diff options
Diffstat (limited to 'sys/dev/drm2/i915/intel_pm.c')
| -rw-r--r-- | sys/dev/drm2/i915/intel_pm.c | 4509 |
1 files changed, 0 insertions, 4509 deletions
diff --git a/sys/dev/drm2/i915/intel_pm.c b/sys/dev/drm2/i915/intel_pm.c deleted file mode 100644 index a2c409f15dfe8..0000000000000 --- a/sys/dev/drm2/i915/intel_pm.c +++ /dev/null @@ -1,4509 +0,0 @@ -/* - * Copyright © 2012 Intel Corporation - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. - * - * Authors: - * Eugeni Dodonov <eugeni.dodonov@intel.com> - * - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <dev/drm2/drmP.h> -#include <dev/drm2/i915/i915_drv.h> -#include <dev/drm2/i915/intel_drv.h> -#include <sys/kdb.h> -#include <machine/clock.h> - -#define FORCEWAKE_ACK_TIMEOUT_MS 2 - -/* FBC, or Frame Buffer Compression, is a technique employed to compress the - * framebuffer contents in-memory, aiming at reducing the required bandwidth - * during in-memory transfers and, therefore, reduce the power packet. - * - * The benefits of FBC are mostly visible with solid backgrounds and - * variation-less patterns. - * - * FBC-related functionality can be enabled by the means of the - * i915.i915_enable_fbc parameter - */ - -static bool intel_crtc_active(struct drm_crtc *crtc) -{ - /* Be paranoid as we can arrive here with only partial - * state retrieved from the hardware during setup. - */ - return to_intel_crtc(crtc)->active && crtc->fb && crtc->mode.clock; -} - -static void i8xx_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 fbc_ctl; - - /* Disable compression */ - fbc_ctl = I915_READ(FBC_CONTROL); - if ((fbc_ctl & FBC_CTL_EN) == 0) - return; - - fbc_ctl &= ~FBC_CTL_EN; - I915_WRITE(FBC_CONTROL, fbc_ctl); - - /* Wait for compressing bit to clear */ - if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { - DRM_DEBUG_KMS("FBC idle timed out\n"); - return; - } - - DRM_DEBUG_KMS("disabled FBC\n"); -} - -static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->fb; - struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); - struct drm_i915_gem_object *obj = intel_fb->obj; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int cfb_pitch; - int plane, i; - u32 fbc_ctl, fbc_ctl2; - - cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; - if (fb->pitches[0] < cfb_pitch) - cfb_pitch = fb->pitches[0]; - - /* FBC_CTL wants 64B units */ - cfb_pitch = (cfb_pitch / 64) - 1; - plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; - - /* Clear old tags */ - for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) - I915_WRITE(FBC_TAG + (i * 4), 0); - - /* Set it up... */ - fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; - fbc_ctl2 |= plane; - I915_WRITE(FBC_CONTROL2, fbc_ctl2); - I915_WRITE(FBC_FENCE_OFF, crtc->y); - - /* enable it... */ - fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC; - if (IS_I945GM(dev)) - fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ - fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; - fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT; - fbc_ctl |= obj->fence_reg; - I915_WRITE(FBC_CONTROL, fbc_ctl); - - DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %d, ", - cfb_pitch, crtc->y, intel_crtc->plane); -} - -static bool i8xx_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(FBC_CONTROL) & FBC_CTL_EN; -} - -static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->fb; - struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); - struct drm_i915_gem_object *obj = intel_fb->obj; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; - unsigned long stall_watermark = 200; - u32 dpfc_ctl; - - dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; - dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; - I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY); - - I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | - (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | - (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); - I915_WRITE(DPFC_FENCE_YOFF, crtc->y); - - /* enable it... */ - I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN); - - DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); -} - -static void g4x_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 dpfc_ctl; - - /* Disable compression */ - dpfc_ctl = I915_READ(DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(DPFC_CONTROL, dpfc_ctl); - - DRM_DEBUG_KMS("disabled FBC\n"); - } -} - -static bool g4x_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; -} - -static void sandybridge_blit_fbc_update(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 blt_ecoskpd; - - /* Make sure blitter notifies FBC of writes */ - gen6_gt_force_wake_get(dev_priv); - blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); - blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << - GEN6_BLITTER_LOCK_SHIFT; - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << - GEN6_BLITTER_LOCK_SHIFT); - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - POSTING_READ(GEN6_BLITTER_ECOSKPD); - gen6_gt_force_wake_put(dev_priv); -} - -static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->fb; - struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); - struct drm_i915_gem_object *obj = intel_fb->obj; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; - unsigned long stall_watermark = 200; - u32 dpfc_ctl; - - dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); - dpfc_ctl &= DPFC_RESERVED; - dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X); - /* Set persistent mode for front-buffer rendering, ala X. */ - dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE; - dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg); - I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY); - - I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | - (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | - (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); - I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); - I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID); - /* enable it... */ - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); - - if (IS_GEN6(dev)) { - I915_WRITE(SNB_DPFC_CTL_SA, - SNB_CPU_FENCE_ENABLE | obj->fence_reg); - I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); - sandybridge_blit_fbc_update(dev); - } - - DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); -} - -static void ironlake_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 dpfc_ctl; - - /* Disable compression */ - dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); - - DRM_DEBUG_KMS("disabled FBC\n"); - } -} - -static bool ironlake_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; -} - -bool intel_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!dev_priv->display.fbc_enabled) - return false; - - return dev_priv->display.fbc_enabled(dev); -} - -static void intel_fbc_work_fn(void *arg, int pending) -{ - struct intel_fbc_work *work = arg; - struct drm_device *dev = work->crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - DRM_LOCK(dev); - if (work == dev_priv->fbc_work) { - /* Double check that we haven't switched fb without cancelling - * the prior work. - */ - if (work->crtc->fb == work->fb) { - dev_priv->display.enable_fbc(work->crtc, - work->interval); - - dev_priv->cfb_plane = to_intel_crtc(work->crtc)->plane; - dev_priv->cfb_fb = work->crtc->fb->base.id; - dev_priv->cfb_y = work->crtc->y; - } - - dev_priv->fbc_work = NULL; - } - DRM_UNLOCK(dev); - - free(work, DRM_MEM_KMS); -} - -static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv) -{ - if (dev_priv->fbc_work == NULL) - return; - - DRM_DEBUG_KMS("cancelling pending FBC enable\n"); - - /* Synchronisation is provided by struct_mutex and checking of - * dev_priv->fbc_work, so we can perform the cancellation - * entirely asynchronously. - */ - if (taskqueue_cancel_timeout(dev_priv->wq, &dev_priv->fbc_work->work, - NULL) == 0) - /* tasklet was killed before being run, clean up */ - free(dev_priv->fbc_work, DRM_MEM_KMS); - - /* Mark the work as no longer wanted so that if it does - * wake-up (because the work was already running and waiting - * for our mutex), it will discover that is no longer - * necessary to run. - */ - dev_priv->fbc_work = NULL; -} - -void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval) -{ - struct intel_fbc_work *work; - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!dev_priv->display.enable_fbc) - return; - - intel_cancel_fbc_work(dev_priv); - - work = malloc(sizeof *work, DRM_MEM_KMS, M_WAITOK | M_ZERO); - if (work == NULL) { - dev_priv->display.enable_fbc(crtc, interval); - return; - } - - work->crtc = crtc; - work->fb = crtc->fb; - work->interval = interval; - TIMEOUT_TASK_INIT(dev_priv->wq, &work->work, 0, intel_fbc_work_fn, - work); - - dev_priv->fbc_work = work; - - DRM_DEBUG_KMS("scheduling delayed FBC enable\n"); - - /* Delay the actual enabling to let pageflipping cease and the - * display to settle before starting the compression. Note that - * this delay also serves a second purpose: it allows for a - * vblank to pass after disabling the FBC before we attempt - * to modify the control registers. - * - * A more complicated solution would involve tracking vblanks - * following the termination of the page-flipping sequence - * and indeed performing the enable as a co-routine and not - * waiting synchronously upon the vblank. - */ - taskqueue_enqueue_timeout(dev_priv->wq, &work->work, - msecs_to_jiffies(50)); -} - -void intel_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - intel_cancel_fbc_work(dev_priv); - - if (!dev_priv->display.disable_fbc) - return; - - dev_priv->display.disable_fbc(dev); - dev_priv->cfb_plane = -1; -} - -/** - * intel_update_fbc - enable/disable FBC as needed - * @dev: the drm_device - * - * Set up the framebuffer compression hardware at mode set time. We - * enable it if possible: - * - plane A only (on pre-965) - * - no pixel mulitply/line duplication - * - no alpha buffer discard - * - no dual wide - * - framebuffer <= 2048 in width, 1536 in height - * - * We can't assume that any compression will take place (worst case), - * so the compressed buffer has to be the same size as the uncompressed - * one. It also must reside (along with the line length buffer) in - * stolen memory. - * - * We need to enable/disable FBC on a global basis. - */ -void intel_update_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc = NULL, *tmp_crtc; - struct intel_crtc *intel_crtc; - struct drm_framebuffer *fb; - struct intel_framebuffer *intel_fb; - struct drm_i915_gem_object *obj; - int enable_fbc; - - if (!i915_powersave) - return; - - if (!I915_HAS_FBC(dev)) - return; - - /* - * If FBC is already on, we just have to verify that we can - * keep it that way... - * Need to disable if: - * - more than one pipe is active - * - changing FBC params (stride, fence, mode) - * - new fb is too large to fit in compressed buffer - * - going to an unsupported config (interlace, pixel multiply, etc.) - */ - list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) { - if (intel_crtc_active(tmp_crtc) && - !to_intel_crtc(tmp_crtc)->primary_disabled) { - if (crtc) { - DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); - dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES; - goto out_disable; - } - crtc = tmp_crtc; - } - } - - if (!crtc || crtc->fb == NULL) { - DRM_DEBUG_KMS("no output, disabling\n"); - dev_priv->no_fbc_reason = FBC_NO_OUTPUT; - goto out_disable; - } - - intel_crtc = to_intel_crtc(crtc); - fb = crtc->fb; - intel_fb = to_intel_framebuffer(fb); - obj = intel_fb->obj; - - enable_fbc = i915_enable_fbc; - if (enable_fbc < 0) { - DRM_DEBUG_KMS("fbc set to per-chip default\n"); - enable_fbc = 1; - if (INTEL_INFO(dev)->gen <= 6) - enable_fbc = 0; - } - if (!enable_fbc) { - DRM_DEBUG_KMS("fbc disabled per module param\n"); - dev_priv->no_fbc_reason = FBC_MODULE_PARAM; - goto out_disable; - } - if (intel_fb->obj->base.size > dev_priv->cfb_size) { - DRM_DEBUG_KMS("framebuffer too large, disabling " - "compression\n"); - dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; - goto out_disable; - } - if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) || - (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) { - DRM_DEBUG_KMS("mode incompatible with compression, " - "disabling\n"); - dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE; - goto out_disable; - } - if ((crtc->mode.hdisplay > 2048) || - (crtc->mode.vdisplay > 1536)) { - DRM_DEBUG_KMS("mode too large for compression, disabling\n"); - dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE; - goto out_disable; - } - if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) { - DRM_DEBUG_KMS("plane not 0, disabling compression\n"); - dev_priv->no_fbc_reason = FBC_BAD_PLANE; - goto out_disable; - } - - /* The use of a CPU fence is mandatory in order to detect writes - * by the CPU to the scanout and trigger updates to the FBC. - */ - if (obj->tiling_mode != I915_TILING_X || - obj->fence_reg == I915_FENCE_REG_NONE) { - DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); - dev_priv->no_fbc_reason = FBC_NOT_TILED; - goto out_disable; - } - - /* If the kernel debugger is active, always disable compression */ - if (kdb_active) - goto out_disable; - - /* If the scanout has not changed, don't modify the FBC settings. - * Note that we make the fundamental assumption that the fb->obj - * cannot be unpinned (and have its GTT offset and fence revoked) - * without first being decoupled from the scanout and FBC disabled. - */ - if (dev_priv->cfb_plane == intel_crtc->plane && - dev_priv->cfb_fb == fb->base.id && - dev_priv->cfb_y == crtc->y) - return; - - if (intel_fbc_enabled(dev)) { - /* We update FBC along two paths, after changing fb/crtc - * configuration (modeswitching) and after page-flipping - * finishes. For the latter, we know that not only did - * we disable the FBC at the start of the page-flip - * sequence, but also more than one vblank has passed. - * - * For the former case of modeswitching, it is possible - * to switch between two FBC valid configurations - * instantaneously so we do need to disable the FBC - * before we can modify its control registers. We also - * have to wait for the next vblank for that to take - * effect. However, since we delay enabling FBC we can - * assume that a vblank has passed since disabling and - * that we can safely alter the registers in the deferred - * callback. - * - * In the scenario that we go from a valid to invalid - * and then back to valid FBC configuration we have - * no strict enforcement that a vblank occurred since - * disabling the FBC. However, along all current pipe - * disabling paths we do need to wait for a vblank at - * some point. And we wait before enabling FBC anyway. - */ - DRM_DEBUG_KMS("disabling active FBC for update\n"); - intel_disable_fbc(dev); - } - - intel_enable_fbc(crtc, 500); - return; - -out_disable: - /* Multiple disables should be harmless */ - if (intel_fbc_enabled(dev)) { - DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); - intel_disable_fbc(dev); - } -} - -static void i915_pineview_get_mem_freq(struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = dev->dev_private; - u32 tmp; - - tmp = I915_READ(CLKCFG); - - switch (tmp & CLKCFG_FSB_MASK) { - case CLKCFG_FSB_533: - dev_priv->fsb_freq = 533; /* 133*4 */ - break; - case CLKCFG_FSB_800: - dev_priv->fsb_freq = 800; /* 200*4 */ - break; - case CLKCFG_FSB_667: - dev_priv->fsb_freq = 667; /* 167*4 */ - break; - case CLKCFG_FSB_400: - dev_priv->fsb_freq = 400; /* 100*4 */ - break; - } - - switch (tmp & CLKCFG_MEM_MASK) { - case CLKCFG_MEM_533: - dev_priv->mem_freq = 533; - break; - case CLKCFG_MEM_667: - dev_priv->mem_freq = 667; - break; - case CLKCFG_MEM_800: - dev_priv->mem_freq = 800; - break; - } - - /* detect pineview DDR3 setting */ - tmp = I915_READ(CSHRDDR3CTL); - dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0; -} - -static void i915_ironlake_get_mem_freq(struct drm_device *dev) -{ - drm_i915_private_t *dev_priv = dev->dev_private; - u16 ddrpll, csipll; - - ddrpll = I915_READ16(DDRMPLL1); - csipll = I915_READ16(CSIPLL0); - - switch (ddrpll & 0xff) { - case 0xc: - dev_priv->mem_freq = 800; - break; - case 0x10: - dev_priv->mem_freq = 1066; - break; - case 0x14: - dev_priv->mem_freq = 1333; - break; - case 0x18: - dev_priv->mem_freq = 1600; - break; - default: - DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n", - ddrpll & 0xff); - dev_priv->mem_freq = 0; - break; - } - - dev_priv->ips.r_t = dev_priv->mem_freq; - - switch (csipll & 0x3ff) { - case 0x00c: - dev_priv->fsb_freq = 3200; - break; - case 0x00e: - dev_priv->fsb_freq = 3733; - break; - case 0x010: - dev_priv->fsb_freq = 4266; - break; - case 0x012: - dev_priv->fsb_freq = 4800; - break; - case 0x014: - dev_priv->fsb_freq = 5333; - break; - case 0x016: - dev_priv->fsb_freq = 5866; - break; - case 0x018: - dev_priv->fsb_freq = 6400; - break; - default: - DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n", - csipll & 0x3ff); - dev_priv->fsb_freq = 0; - break; - } - - if (dev_priv->fsb_freq == 3200) { - dev_priv->ips.c_m = 0; - } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) { - dev_priv->ips.c_m = 1; - } else { - dev_priv->ips.c_m = 2; - } -} - -static const struct cxsr_latency cxsr_latency_table[] = { - {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */ - {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */ - {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */ - {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */ - {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */ - - {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */ - {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */ - {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */ - {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */ - {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */ - - {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */ - {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */ - {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */ - {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */ - {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */ - - {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */ - {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */ - {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */ - {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */ - {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */ - - {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */ - {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */ - {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */ - {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */ - {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */ - - {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */ - {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */ - {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */ - {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */ - {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */ -}; - -static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop, - int is_ddr3, - int fsb, - int mem) -{ - const struct cxsr_latency *latency; - int i; - - if (fsb == 0 || mem == 0) - return NULL; - - for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) { - latency = &cxsr_latency_table[i]; - if (is_desktop == latency->is_desktop && - is_ddr3 == latency->is_ddr3 && - fsb == latency->fsb_freq && mem == latency->mem_freq) - return latency; - } - - DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); - - return NULL; -} - -static void pineview_disable_cxsr(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - /* deactivate cxsr */ - I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN); -} - -/* - * Latency for FIFO fetches is dependent on several factors: - * - memory configuration (speed, channels) - * - chipset - * - current MCH state - * It can be fairly high in some situations, so here we assume a fairly - * pessimal value. It's a tradeoff between extra memory fetches (if we - * set this value too high, the FIFO will fetch frequently to stay full) - * and power consumption (set it too low to save power and we might see - * FIFO underruns and display "flicker"). - * - * A value of 5us seems to be a good balance; safe for very low end - * platforms but not overly aggressive on lower latency configs. - */ -static const int latency_ns = 5000; - -static int i9xx_get_fifo_size(struct drm_device *dev, int plane) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dsparb = I915_READ(DSPARB); - int size; - - size = dsparb & 0x7f; - if (plane) - size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size; - - DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, - plane ? "B" : "A", size); - - return size; -} - -static int i85x_get_fifo_size(struct drm_device *dev, int plane) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dsparb = I915_READ(DSPARB); - int size; - - size = dsparb & 0x1ff; - if (plane) - size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size; - size >>= 1; /* Convert to cachelines */ - - DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, - plane ? "B" : "A", size); - - return size; -} - -static int i845_get_fifo_size(struct drm_device *dev, int plane) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dsparb = I915_READ(DSPARB); - int size; - - size = dsparb & 0x7f; - size >>= 2; /* Convert to cachelines */ - - DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, - plane ? "B" : "A", - size); - - return size; -} - -static int i830_get_fifo_size(struct drm_device *dev, int plane) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dsparb = I915_READ(DSPARB); - int size; - - size = dsparb & 0x7f; - size >>= 1; /* Convert to cachelines */ - - DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, - plane ? "B" : "A", size); - - return size; -} - -/* Pineview has different values for various configs */ -static const struct intel_watermark_params pineview_display_wm = { - PINEVIEW_DISPLAY_FIFO, - PINEVIEW_MAX_WM, - PINEVIEW_DFT_WM, - PINEVIEW_GUARD_WM, - PINEVIEW_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params pineview_display_hplloff_wm = { - PINEVIEW_DISPLAY_FIFO, - PINEVIEW_MAX_WM, - PINEVIEW_DFT_HPLLOFF_WM, - PINEVIEW_GUARD_WM, - PINEVIEW_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params pineview_cursor_wm = { - PINEVIEW_CURSOR_FIFO, - PINEVIEW_CURSOR_MAX_WM, - PINEVIEW_CURSOR_DFT_WM, - PINEVIEW_CURSOR_GUARD_WM, - PINEVIEW_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params pineview_cursor_hplloff_wm = { - PINEVIEW_CURSOR_FIFO, - PINEVIEW_CURSOR_MAX_WM, - PINEVIEW_CURSOR_DFT_WM, - PINEVIEW_CURSOR_GUARD_WM, - PINEVIEW_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params g4x_wm_info = { - G4X_FIFO_SIZE, - G4X_MAX_WM, - G4X_MAX_WM, - 2, - G4X_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params g4x_cursor_wm_info = { - I965_CURSOR_FIFO, - I965_CURSOR_MAX_WM, - I965_CURSOR_DFT_WM, - 2, - G4X_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params valleyview_wm_info = { - VALLEYVIEW_FIFO_SIZE, - VALLEYVIEW_MAX_WM, - VALLEYVIEW_MAX_WM, - 2, - G4X_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params valleyview_cursor_wm_info = { - I965_CURSOR_FIFO, - VALLEYVIEW_CURSOR_MAX_WM, - I965_CURSOR_DFT_WM, - 2, - G4X_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params i965_cursor_wm_info = { - I965_CURSOR_FIFO, - I965_CURSOR_MAX_WM, - I965_CURSOR_DFT_WM, - 2, - I915_FIFO_LINE_SIZE, -}; -static const struct intel_watermark_params i945_wm_info = { - I945_FIFO_SIZE, - I915_MAX_WM, - 1, - 2, - I915_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params i915_wm_info = { - I915_FIFO_SIZE, - I915_MAX_WM, - 1, - 2, - I915_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params i855_wm_info = { - I855GM_FIFO_SIZE, - I915_MAX_WM, - 1, - 2, - I830_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params i830_wm_info = { - I830_FIFO_SIZE, - I915_MAX_WM, - 1, - 2, - I830_FIFO_LINE_SIZE -}; - -static const struct intel_watermark_params ironlake_display_wm_info = { - ILK_DISPLAY_FIFO, - ILK_DISPLAY_MAXWM, - ILK_DISPLAY_DFTWM, - 2, - ILK_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params ironlake_cursor_wm_info = { - ILK_CURSOR_FIFO, - ILK_CURSOR_MAXWM, - ILK_CURSOR_DFTWM, - 2, - ILK_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params ironlake_display_srwm_info = { - ILK_DISPLAY_SR_FIFO, - ILK_DISPLAY_MAX_SRWM, - ILK_DISPLAY_DFT_SRWM, - 2, - ILK_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params ironlake_cursor_srwm_info = { - ILK_CURSOR_SR_FIFO, - ILK_CURSOR_MAX_SRWM, - ILK_CURSOR_DFT_SRWM, - 2, - ILK_FIFO_LINE_SIZE -}; - -static const struct intel_watermark_params sandybridge_display_wm_info = { - SNB_DISPLAY_FIFO, - SNB_DISPLAY_MAXWM, - SNB_DISPLAY_DFTWM, - 2, - SNB_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params sandybridge_cursor_wm_info = { - SNB_CURSOR_FIFO, - SNB_CURSOR_MAXWM, - SNB_CURSOR_DFTWM, - 2, - SNB_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params sandybridge_display_srwm_info = { - SNB_DISPLAY_SR_FIFO, - SNB_DISPLAY_MAX_SRWM, - SNB_DISPLAY_DFT_SRWM, - 2, - SNB_FIFO_LINE_SIZE -}; -static const struct intel_watermark_params sandybridge_cursor_srwm_info = { - SNB_CURSOR_SR_FIFO, - SNB_CURSOR_MAX_SRWM, - SNB_CURSOR_DFT_SRWM, - 2, - SNB_FIFO_LINE_SIZE -}; - - -/** - * intel_calculate_wm - calculate watermark level - * @clock_in_khz: pixel clock - * @wm: chip FIFO params - * @pixel_size: display pixel size - * @latency_ns: memory latency for the platform - * - * Calculate the watermark level (the level at which the display plane will - * start fetching from memory again). Each chip has a different display - * FIFO size and allocation, so the caller needs to figure that out and pass - * in the correct intel_watermark_params structure. - * - * As the pixel clock runs, the FIFO will be drained at a rate that depends - * on the pixel size. When it reaches the watermark level, it'll start - * fetching FIFO line sized based chunks from memory until the FIFO fills - * past the watermark point. If the FIFO drains completely, a FIFO underrun - * will occur, and a display engine hang could result. - */ -static unsigned long intel_calculate_wm(unsigned long clock_in_khz, - const struct intel_watermark_params *wm, - int fifo_size, - int pixel_size, - unsigned long latency_ns) -{ - long entries_required, wm_size; - - /* - * Note: we need to make sure we don't overflow for various clock & - * latency values. - * clocks go from a few thousand to several hundred thousand. - * latency is usually a few thousand - */ - entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) / - 1000; - entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size); - - DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required); - - wm_size = fifo_size - (entries_required + wm->guard_size); - - DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size); - - /* Don't promote wm_size to unsigned... */ - if (wm_size > (long)wm->max_wm) - wm_size = wm->max_wm; - if (wm_size <= 0) - wm_size = wm->default_wm; - return wm_size; -} - -static struct drm_crtc *single_enabled_crtc(struct drm_device *dev) -{ - struct drm_crtc *crtc, *enabled = NULL; - - list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { - if (intel_crtc_active(crtc)) { - if (enabled) - return NULL; - enabled = crtc; - } - } - - return enabled; -} - -static void pineview_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc; - const struct cxsr_latency *latency; - u32 reg; - unsigned long wm; - - latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3, - dev_priv->fsb_freq, dev_priv->mem_freq); - if (!latency) { - DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); - pineview_disable_cxsr(dev); - return; - } - - crtc = single_enabled_crtc(dev); - if (crtc) { - int clock = crtc->mode.clock; - int pixel_size = crtc->fb->bits_per_pixel / 8; - - /* Display SR */ - wm = intel_calculate_wm(clock, &pineview_display_wm, - pineview_display_wm.fifo_size, - pixel_size, latency->display_sr); - reg = I915_READ(DSPFW1); - reg &= ~DSPFW_SR_MASK; - reg |= wm << DSPFW_SR_SHIFT; - I915_WRITE(DSPFW1, reg); - DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg); - - /* cursor SR */ - wm = intel_calculate_wm(clock, &pineview_cursor_wm, - pineview_display_wm.fifo_size, - pixel_size, latency->cursor_sr); - reg = I915_READ(DSPFW3); - reg &= ~DSPFW_CURSOR_SR_MASK; - reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT; - I915_WRITE(DSPFW3, reg); - - /* Display HPLL off SR */ - wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm, - pineview_display_hplloff_wm.fifo_size, - pixel_size, latency->display_hpll_disable); - reg = I915_READ(DSPFW3); - reg &= ~DSPFW_HPLL_SR_MASK; - reg |= wm & DSPFW_HPLL_SR_MASK; - I915_WRITE(DSPFW3, reg); - - /* cursor HPLL off SR */ - wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm, - pineview_display_hplloff_wm.fifo_size, - pixel_size, latency->cursor_hpll_disable); - reg = I915_READ(DSPFW3); - reg &= ~DSPFW_HPLL_CURSOR_MASK; - reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT; - I915_WRITE(DSPFW3, reg); - DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg); - - /* activate cxsr */ - I915_WRITE(DSPFW3, - I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN); - DRM_DEBUG_KMS("Self-refresh is enabled\n"); - } else { - pineview_disable_cxsr(dev); - DRM_DEBUG_KMS("Self-refresh is disabled\n"); - } -} - -static bool g4x_compute_wm0(struct drm_device *dev, - int plane, - const struct intel_watermark_params *display, - int display_latency_ns, - const struct intel_watermark_params *cursor, - int cursor_latency_ns, - int *plane_wm, - int *cursor_wm) -{ - struct drm_crtc *crtc; - int htotal, hdisplay, clock, pixel_size; - int line_time_us, line_count; - int entries, tlb_miss; - - crtc = intel_get_crtc_for_plane(dev, plane); - if (!intel_crtc_active(crtc)) { - *cursor_wm = cursor->guard_size; - *plane_wm = display->guard_size; - return false; - } - - htotal = crtc->mode.htotal; - hdisplay = crtc->mode.hdisplay; - clock = crtc->mode.clock; - pixel_size = crtc->fb->bits_per_pixel / 8; - - /* Use the small buffer method to calculate plane watermark */ - entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; - tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8; - if (tlb_miss > 0) - entries += tlb_miss; - entries = DIV_ROUND_UP(entries, display->cacheline_size); - *plane_wm = entries + display->guard_size; - if (*plane_wm > (int)display->max_wm) - *plane_wm = display->max_wm; - - /* Use the large buffer method to calculate cursor watermark */ - line_time_us = ((htotal * 1000) / clock); - line_count = (cursor_latency_ns / line_time_us + 1000) / 1000; - entries = line_count * 64 * pixel_size; - tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8; - if (tlb_miss > 0) - entries += tlb_miss; - entries = DIV_ROUND_UP(entries, cursor->cacheline_size); - *cursor_wm = entries + cursor->guard_size; - if (*cursor_wm > (int)cursor->max_wm) - *cursor_wm = (int)cursor->max_wm; - - return true; -} - -/* - * Check the wm result. - * - * If any calculated watermark values is larger than the maximum value that - * can be programmed into the associated watermark register, that watermark - * must be disabled. - */ -static bool g4x_check_srwm(struct drm_device *dev, - int display_wm, int cursor_wm, - const struct intel_watermark_params *display, - const struct intel_watermark_params *cursor) -{ - DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n", - display_wm, cursor_wm); - - if (display_wm > display->max_wm) { - DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n", - display_wm, display->max_wm); - return false; - } - - if (cursor_wm > cursor->max_wm) { - DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n", - cursor_wm, cursor->max_wm); - return false; - } - - if (!(display_wm || cursor_wm)) { - DRM_DEBUG_KMS("SR latency is 0, disabling\n"); - return false; - } - - return true; -} - -static bool g4x_compute_srwm(struct drm_device *dev, - int plane, - int latency_ns, - const struct intel_watermark_params *display, - const struct intel_watermark_params *cursor, - int *display_wm, int *cursor_wm) -{ - struct drm_crtc *crtc; - int hdisplay, htotal, pixel_size, clock; - unsigned long line_time_us; - int line_count, line_size; - int small, large; - int entries; - - if (!latency_ns) { - *display_wm = *cursor_wm = 0; - return false; - } - - crtc = intel_get_crtc_for_plane(dev, plane); - hdisplay = crtc->mode.hdisplay; - htotal = crtc->mode.htotal; - clock = crtc->mode.clock; - pixel_size = crtc->fb->bits_per_pixel / 8; - - line_time_us = (htotal * 1000) / clock; - line_count = (latency_ns / line_time_us + 1000) / 1000; - line_size = hdisplay * pixel_size; - - /* Use the minimum of the small and large buffer method for primary */ - small = ((clock * pixel_size / 1000) * latency_ns) / 1000; - large = line_count * line_size; - - entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); - *display_wm = entries + display->guard_size; - - /* calculate the self-refresh watermark for display cursor */ - entries = line_count * pixel_size * 64; - entries = DIV_ROUND_UP(entries, cursor->cacheline_size); - *cursor_wm = entries + cursor->guard_size; - - return g4x_check_srwm(dev, - *display_wm, *cursor_wm, - display, cursor); -} - -static bool vlv_compute_drain_latency(struct drm_device *dev, - int plane, - int *plane_prec_mult, - int *plane_dl, - int *cursor_prec_mult, - int *cursor_dl) -{ - struct drm_crtc *crtc; - int clock, pixel_size; - int entries; - - crtc = intel_get_crtc_for_plane(dev, plane); - if (!intel_crtc_active(crtc)) - return false; - - clock = crtc->mode.clock; /* VESA DOT Clock */ - pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */ - - entries = (clock / 1000) * pixel_size; - *plane_prec_mult = (entries > 256) ? - DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; - *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) * - pixel_size); - - entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */ - *cursor_prec_mult = (entries > 256) ? - DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; - *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4); - - return true; -} - -/* - * Update drain latency registers of memory arbiter - * - * Valleyview SoC has a new memory arbiter and needs drain latency registers - * to be programmed. Each plane has a drain latency multiplier and a drain - * latency value. - */ - -static void vlv_update_drain_latency(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int planea_prec, planea_dl, planeb_prec, planeb_dl; - int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl; - int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is - either 16 or 32 */ - - /* For plane A, Cursor A */ - if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl, - &cursor_prec_mult, &cursora_dl)) { - cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? - DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16; - planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? - DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16; - - I915_WRITE(VLV_DDL1, cursora_prec | - (cursora_dl << DDL_CURSORA_SHIFT) | - planea_prec | planea_dl); - } - - /* For plane B, Cursor B */ - if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl, - &cursor_prec_mult, &cursorb_dl)) { - cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? - DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16; - planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? - DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16; - - I915_WRITE(VLV_DDL2, cursorb_prec | - (cursorb_dl << DDL_CURSORB_SHIFT) | - planeb_prec | planeb_dl); - } -} - -#define single_plane_enabled(mask) ((mask) != 0 && powerof2(mask)) - -static void valleyview_update_wm(struct drm_device *dev) -{ - static const int sr_latency_ns = 12000; - struct drm_i915_private *dev_priv = dev->dev_private; - int planea_wm, planeb_wm, cursora_wm, cursorb_wm; - int plane_sr, cursor_sr; - int ignore_plane_sr, ignore_cursor_sr; - unsigned int enabled = 0; - - vlv_update_drain_latency(dev); - - if (g4x_compute_wm0(dev, 0, - &valleyview_wm_info, latency_ns, - &valleyview_cursor_wm_info, latency_ns, - &planea_wm, &cursora_wm)) - enabled |= 1; - - if (g4x_compute_wm0(dev, 1, - &valleyview_wm_info, latency_ns, - &valleyview_cursor_wm_info, latency_ns, - &planeb_wm, &cursorb_wm)) - enabled |= 2; - - if (single_plane_enabled(enabled) && - g4x_compute_srwm(dev, ffs(enabled) - 1, - sr_latency_ns, - &valleyview_wm_info, - &valleyview_cursor_wm_info, - &plane_sr, &ignore_cursor_sr) && - g4x_compute_srwm(dev, ffs(enabled) - 1, - 2*sr_latency_ns, - &valleyview_wm_info, - &valleyview_cursor_wm_info, - &ignore_plane_sr, &cursor_sr)) { - I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN); - } else { - I915_WRITE(FW_BLC_SELF_VLV, - I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN); - plane_sr = cursor_sr = 0; - } - - DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", - planea_wm, cursora_wm, - planeb_wm, cursorb_wm, - plane_sr, cursor_sr); - - I915_WRITE(DSPFW1, - (plane_sr << DSPFW_SR_SHIFT) | - (cursorb_wm << DSPFW_CURSORB_SHIFT) | - (planeb_wm << DSPFW_PLANEB_SHIFT) | - planea_wm); - I915_WRITE(DSPFW2, - (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | - (cursora_wm << DSPFW_CURSORA_SHIFT)); - I915_WRITE(DSPFW3, - (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) | - (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); -} - -static void g4x_update_wm(struct drm_device *dev) -{ - static const int sr_latency_ns = 12000; - struct drm_i915_private *dev_priv = dev->dev_private; - int planea_wm, planeb_wm, cursora_wm, cursorb_wm; - int plane_sr, cursor_sr; - unsigned int enabled = 0; - - if (g4x_compute_wm0(dev, 0, - &g4x_wm_info, latency_ns, - &g4x_cursor_wm_info, latency_ns, - &planea_wm, &cursora_wm)) - enabled |= 1; - - if (g4x_compute_wm0(dev, 1, - &g4x_wm_info, latency_ns, - &g4x_cursor_wm_info, latency_ns, - &planeb_wm, &cursorb_wm)) - enabled |= 2; - - if (single_plane_enabled(enabled) && - g4x_compute_srwm(dev, ffs(enabled) - 1, - sr_latency_ns, - &g4x_wm_info, - &g4x_cursor_wm_info, - &plane_sr, &cursor_sr)) { - I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); - } else { - I915_WRITE(FW_BLC_SELF, - I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN); - plane_sr = cursor_sr = 0; - } - - DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", - planea_wm, cursora_wm, - planeb_wm, cursorb_wm, - plane_sr, cursor_sr); - - I915_WRITE(DSPFW1, - (plane_sr << DSPFW_SR_SHIFT) | - (cursorb_wm << DSPFW_CURSORB_SHIFT) | - (planeb_wm << DSPFW_PLANEB_SHIFT) | - planea_wm); - I915_WRITE(DSPFW2, - (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | - (cursora_wm << DSPFW_CURSORA_SHIFT)); - /* HPLL off in SR has some issues on G4x... disable it */ - I915_WRITE(DSPFW3, - (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) | - (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); -} - -static void i965_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc; - int srwm = 1; - int cursor_sr = 16; - - /* Calc sr entries for one plane configs */ - crtc = single_enabled_crtc(dev); - if (crtc) { - /* self-refresh has much higher latency */ - static const int sr_latency_ns = 12000; - int clock = crtc->mode.clock; - int htotal = crtc->mode.htotal; - int hdisplay = crtc->mode.hdisplay; - int pixel_size = crtc->fb->bits_per_pixel / 8; - unsigned long line_time_us; - int entries; - - line_time_us = ((htotal * 1000) / clock); - - /* Use ns/us then divide to preserve precision */ - entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * - pixel_size * hdisplay; - entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); - srwm = I965_FIFO_SIZE - entries; - if (srwm < 0) - srwm = 1; - srwm &= 0x1ff; - DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n", - entries, srwm); - - entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * - pixel_size * 64; - entries = DIV_ROUND_UP(entries, - i965_cursor_wm_info.cacheline_size); - cursor_sr = i965_cursor_wm_info.fifo_size - - (entries + i965_cursor_wm_info.guard_size); - - if (cursor_sr > i965_cursor_wm_info.max_wm) - cursor_sr = i965_cursor_wm_info.max_wm; - - DRM_DEBUG_KMS("self-refresh watermark: display plane %d " - "cursor %d\n", srwm, cursor_sr); - - if (IS_CRESTLINE(dev)) - I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); - } else { - /* Turn off self refresh if both pipes are enabled */ - if (IS_CRESTLINE(dev)) - I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF) - & ~FW_BLC_SELF_EN); - } - - DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", - srwm); - - /* 965 has limitations... */ - I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | - (8 << 16) | (8 << 8) | (8 << 0)); - I915_WRITE(DSPFW2, (8 << 8) | (8 << 0)); - /* update cursor SR watermark */ - I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); -} - -static void i9xx_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - const struct intel_watermark_params *wm_info; - uint32_t fwater_lo; - uint32_t fwater_hi; - int cwm, srwm = 1; - int fifo_size; - int planea_wm, planeb_wm; - struct drm_crtc *crtc, *enabled = NULL; - - if (IS_I945GM(dev)) - wm_info = &i945_wm_info; - else if (!IS_GEN2(dev)) - wm_info = &i915_wm_info; - else - wm_info = &i855_wm_info; - - fifo_size = dev_priv->display.get_fifo_size(dev, 0); - crtc = intel_get_crtc_for_plane(dev, 0); - if (intel_crtc_active(crtc)) { - int cpp = crtc->fb->bits_per_pixel / 8; - if (IS_GEN2(dev)) - cpp = 4; - - planea_wm = intel_calculate_wm(crtc->mode.clock, - wm_info, fifo_size, cpp, - latency_ns); - enabled = crtc; - } else - planea_wm = fifo_size - wm_info->guard_size; - - fifo_size = dev_priv->display.get_fifo_size(dev, 1); - crtc = intel_get_crtc_for_plane(dev, 1); - if (intel_crtc_active(crtc)) { - int cpp = crtc->fb->bits_per_pixel / 8; - if (IS_GEN2(dev)) - cpp = 4; - - planeb_wm = intel_calculate_wm(crtc->mode.clock, - wm_info, fifo_size, cpp, - latency_ns); - if (enabled == NULL) - enabled = crtc; - else - enabled = NULL; - } else - planeb_wm = fifo_size - wm_info->guard_size; - - DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm); - - /* - * Overlay gets an aggressive default since video jitter is bad. - */ - cwm = 2; - - /* Play safe and disable self-refresh before adjusting watermarks. */ - if (IS_I945G(dev) || IS_I945GM(dev)) - I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0); - else if (IS_I915GM(dev)) - I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN); - - /* Calc sr entries for one plane configs */ - if (HAS_FW_BLC(dev) && enabled) { - /* self-refresh has much higher latency */ - static const int sr_latency_ns = 6000; - int clock = enabled->mode.clock; - int htotal = enabled->mode.htotal; - int hdisplay = enabled->mode.hdisplay; - int pixel_size = enabled->fb->bits_per_pixel / 8; - unsigned long line_time_us; - int entries; - - line_time_us = (htotal * 1000) / clock; - - /* Use ns/us then divide to preserve precision */ - entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * - pixel_size * hdisplay; - entries = DIV_ROUND_UP(entries, wm_info->cacheline_size); - DRM_DEBUG_KMS("self-refresh entries: %d\n", entries); - srwm = wm_info->fifo_size - entries; - if (srwm < 0) - srwm = 1; - - if (IS_I945G(dev) || IS_I945GM(dev)) - I915_WRITE(FW_BLC_SELF, - FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); - else if (IS_I915GM(dev)) - I915_WRITE(FW_BLC_SELF, srwm & 0x3f); - } - - DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n", - planea_wm, planeb_wm, cwm, srwm); - - fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f); - fwater_hi = (cwm & 0x1f); - - /* Set request length to 8 cachelines per fetch */ - fwater_lo = fwater_lo | (1 << 24) | (1 << 8); - fwater_hi = fwater_hi | (1 << 8); - - I915_WRITE(FW_BLC, fwater_lo); - I915_WRITE(FW_BLC2, fwater_hi); - - if (HAS_FW_BLC(dev)) { - if (enabled) { - if (IS_I945G(dev) || IS_I945GM(dev)) - I915_WRITE(FW_BLC_SELF, - FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); - else if (IS_I915GM(dev)) - I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN); - DRM_DEBUG_KMS("memory self refresh enabled\n"); - } else - DRM_DEBUG_KMS("memory self refresh disabled\n"); - } -} - -static void i830_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc; - uint32_t fwater_lo; - int planea_wm; - - crtc = single_enabled_crtc(dev); - if (crtc == NULL) - return; - - planea_wm = intel_calculate_wm(crtc->mode.clock, &i830_wm_info, - dev_priv->display.get_fifo_size(dev, 0), - 4, latency_ns); - fwater_lo = I915_READ(FW_BLC) & ~0xfff; - fwater_lo |= (3<<8) | planea_wm; - - DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm); - - I915_WRITE(FW_BLC, fwater_lo); -} - -#define ILK_LP0_PLANE_LATENCY 700 -#define ILK_LP0_CURSOR_LATENCY 1300 - -/* - * Check the wm result. - * - * If any calculated watermark values is larger than the maximum value that - * can be programmed into the associated watermark register, that watermark - * must be disabled. - */ -static bool ironlake_check_srwm(struct drm_device *dev, int level, - int fbc_wm, int display_wm, int cursor_wm, - const struct intel_watermark_params *display, - const struct intel_watermark_params *cursor) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d," - " cursor %d\n", level, display_wm, fbc_wm, cursor_wm); - - if (fbc_wm > SNB_FBC_MAX_SRWM) { - DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n", - fbc_wm, SNB_FBC_MAX_SRWM, level); - - /* fbc has it's own way to disable FBC WM */ - I915_WRITE(DISP_ARB_CTL, - I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); - return false; - } - - if (display_wm > display->max_wm) { - DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n", - display_wm, SNB_DISPLAY_MAX_SRWM, level); - return false; - } - - if (cursor_wm > cursor->max_wm) { - DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n", - cursor_wm, SNB_CURSOR_MAX_SRWM, level); - return false; - } - - if (!(fbc_wm || display_wm || cursor_wm)) { - DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level); - return false; - } - - return true; -} - -/* - * Compute watermark values of WM[1-3], - */ -static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane, - int latency_ns, - const struct intel_watermark_params *display, - const struct intel_watermark_params *cursor, - int *fbc_wm, int *display_wm, int *cursor_wm) -{ - struct drm_crtc *crtc; - unsigned long line_time_us; - int hdisplay, htotal, pixel_size, clock; - int line_count, line_size; - int small, large; - int entries; - - if (!latency_ns) { - *fbc_wm = *display_wm = *cursor_wm = 0; - return false; - } - - crtc = intel_get_crtc_for_plane(dev, plane); - hdisplay = crtc->mode.hdisplay; - htotal = crtc->mode.htotal; - clock = crtc->mode.clock; - pixel_size = crtc->fb->bits_per_pixel / 8; - - line_time_us = (htotal * 1000) / clock; - line_count = (latency_ns / line_time_us + 1000) / 1000; - line_size = hdisplay * pixel_size; - - /* Use the minimum of the small and large buffer method for primary */ - small = ((clock * pixel_size / 1000) * latency_ns) / 1000; - large = line_count * line_size; - - entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); - *display_wm = entries + display->guard_size; - - /* - * Spec says: - * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2 - */ - *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2; - - /* calculate the self-refresh watermark for display cursor */ - entries = line_count * pixel_size * 64; - entries = DIV_ROUND_UP(entries, cursor->cacheline_size); - *cursor_wm = entries + cursor->guard_size; - - return ironlake_check_srwm(dev, level, - *fbc_wm, *display_wm, *cursor_wm, - display, cursor); -} - -static void ironlake_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int fbc_wm, plane_wm, cursor_wm; - unsigned int enabled; - - enabled = 0; - if (g4x_compute_wm0(dev, 0, - &ironlake_display_wm_info, - ILK_LP0_PLANE_LATENCY, - &ironlake_cursor_wm_info, - ILK_LP0_CURSOR_LATENCY, - &plane_wm, &cursor_wm)) { - I915_WRITE(WM0_PIPEA_ILK, - (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); - DRM_DEBUG_KMS("FIFO watermarks For pipe A -" - " plane %d, " "cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 1; - } - - if (g4x_compute_wm0(dev, 1, - &ironlake_display_wm_info, - ILK_LP0_PLANE_LATENCY, - &ironlake_cursor_wm_info, - ILK_LP0_CURSOR_LATENCY, - &plane_wm, &cursor_wm)) { - I915_WRITE(WM0_PIPEB_ILK, - (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm); - DRM_DEBUG_KMS("FIFO watermarks For pipe B -" - " plane %d, cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 2; - } - - /* - * Calculate and update the self-refresh watermark only when one - * display plane is used. - */ - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - if (!single_plane_enabled(enabled)) - return; - enabled = ffs(enabled) - 1; - - /* WM1 */ - if (!ironlake_compute_srwm(dev, 1, enabled, - ILK_READ_WM1_LATENCY() * 500, - &ironlake_display_srwm_info, - &ironlake_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM1_LP_ILK, - WM1_LP_SR_EN | - (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* WM2 */ - if (!ironlake_compute_srwm(dev, 2, enabled, - ILK_READ_WM2_LATENCY() * 500, - &ironlake_display_srwm_info, - &ironlake_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM2_LP_ILK, - WM2_LP_EN | - (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* - * WM3 is unsupported on ILK, probably because we don't have latency - * data for that power state - */ -} - -static void sandybridge_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ - u32 val; - int fbc_wm, plane_wm, cursor_wm; - unsigned int enabled; - - enabled = 0; - if (g4x_compute_wm0(dev, 0, - &sandybridge_display_wm_info, latency, - &sandybridge_cursor_wm_info, latency, - &plane_wm, &cursor_wm)) { - val = I915_READ(WM0_PIPEA_ILK); - val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); - I915_WRITE(WM0_PIPEA_ILK, val | - ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); - DRM_DEBUG_KMS("FIFO watermarks For pipe A -" - " plane %d, " "cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 1; - } - - if (g4x_compute_wm0(dev, 1, - &sandybridge_display_wm_info, latency, - &sandybridge_cursor_wm_info, latency, - &plane_wm, &cursor_wm)) { - val = I915_READ(WM0_PIPEB_ILK); - val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); - I915_WRITE(WM0_PIPEB_ILK, val | - ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); - DRM_DEBUG_KMS("FIFO watermarks For pipe B -" - " plane %d, cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 2; - } - - /* - * Calculate and update the self-refresh watermark only when one - * display plane is used. - * - * SNB support 3 levels of watermark. - * - * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, - * and disabled in the descending order - * - */ - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - if (!single_plane_enabled(enabled) || - dev_priv->sprite_scaling_enabled) - return; - enabled = ffs(enabled) - 1; - - /* WM1 */ - if (!ironlake_compute_srwm(dev, 1, enabled, - SNB_READ_WM1_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM1_LP_ILK, - WM1_LP_SR_EN | - (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* WM2 */ - if (!ironlake_compute_srwm(dev, 2, enabled, - SNB_READ_WM2_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM2_LP_ILK, - WM2_LP_EN | - (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* WM3 */ - if (!ironlake_compute_srwm(dev, 3, enabled, - SNB_READ_WM3_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM3_LP_ILK, - WM3_LP_EN | - (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); -} - -static void ivybridge_update_wm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ - u32 val; - int fbc_wm, plane_wm, cursor_wm; - int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm; - unsigned int enabled; - - enabled = 0; - if (g4x_compute_wm0(dev, 0, - &sandybridge_display_wm_info, latency, - &sandybridge_cursor_wm_info, latency, - &plane_wm, &cursor_wm)) { - val = I915_READ(WM0_PIPEA_ILK); - val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); - I915_WRITE(WM0_PIPEA_ILK, val | - ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); - DRM_DEBUG_KMS("FIFO watermarks For pipe A -" - " plane %d, " "cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 1; - } - - if (g4x_compute_wm0(dev, 1, - &sandybridge_display_wm_info, latency, - &sandybridge_cursor_wm_info, latency, - &plane_wm, &cursor_wm)) { - val = I915_READ(WM0_PIPEB_ILK); - val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); - I915_WRITE(WM0_PIPEB_ILK, val | - ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); - DRM_DEBUG_KMS("FIFO watermarks For pipe B -" - " plane %d, cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 2; - } - - if (g4x_compute_wm0(dev, 2, - &sandybridge_display_wm_info, latency, - &sandybridge_cursor_wm_info, latency, - &plane_wm, &cursor_wm)) { - val = I915_READ(WM0_PIPEC_IVB); - val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK); - I915_WRITE(WM0_PIPEC_IVB, val | - ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm)); - DRM_DEBUG_KMS("FIFO watermarks For pipe C -" - " plane %d, cursor: %d\n", - plane_wm, cursor_wm); - enabled |= 3; - } - - /* - * Calculate and update the self-refresh watermark only when one - * display plane is used. - * - * SNB support 3 levels of watermark. - * - * WM1/WM2/WM2 watermarks have to be enabled in the ascending order, - * and disabled in the descending order - * - */ - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - if (!single_plane_enabled(enabled) || - dev_priv->sprite_scaling_enabled) - return; - enabled = ffs(enabled) - 1; - - /* WM1 */ - if (!ironlake_compute_srwm(dev, 1, enabled, - SNB_READ_WM1_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM1_LP_ILK, - WM1_LP_SR_EN | - (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* WM2 */ - if (!ironlake_compute_srwm(dev, 2, enabled, - SNB_READ_WM2_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM2_LP_ILK, - WM2_LP_EN | - (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); - - /* WM3, note we have to correct the cursor latency */ - if (!ironlake_compute_srwm(dev, 3, enabled, - SNB_READ_WM3_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &fbc_wm, &plane_wm, &ignore_cursor_wm) || - !ironlake_compute_srwm(dev, 3, enabled, - 2 * SNB_READ_WM3_LATENCY() * 500, - &sandybridge_display_srwm_info, - &sandybridge_cursor_srwm_info, - &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm)) - return; - - I915_WRITE(WM3_LP_ILK, - WM3_LP_EN | - (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) | - (fbc_wm << WM1_LP_FBC_SHIFT) | - (plane_wm << WM1_LP_SR_SHIFT) | - cursor_wm); -} - -static void -haswell_update_linetime_wm(struct drm_device *dev, int pipe, - struct drm_display_mode *mode) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 temp; - - temp = I915_READ(PIPE_WM_LINETIME(pipe)); - temp &= ~PIPE_WM_LINETIME_MASK; - - /* The WM are computed with base on how long it takes to fill a single - * row at the given clock rate, multiplied by 8. - * */ - temp |= PIPE_WM_LINETIME_TIME( - ((mode->crtc_hdisplay * 1000) / mode->clock) * 8); - - /* IPS watermarks are only used by pipe A, and are ignored by - * pipes B and C. They are calculated similarly to the common - * linetime values, except that we are using CD clock frequency - * in MHz instead of pixel rate for the division. - * - * This is a placeholder for the IPS watermark calculation code. - */ - - I915_WRITE(PIPE_WM_LINETIME(pipe), temp); -} - -static bool -sandybridge_compute_sprite_wm(struct drm_device *dev, int plane, - uint32_t sprite_width, int pixel_size, - const struct intel_watermark_params *display, - int display_latency_ns, int *sprite_wm) -{ - struct drm_crtc *crtc; - int clock; - int entries, tlb_miss; - - crtc = intel_get_crtc_for_plane(dev, plane); - if (!intel_crtc_active(crtc)) { - *sprite_wm = display->guard_size; - return false; - } - - clock = crtc->mode.clock; - - /* Use the small buffer method to calculate the sprite watermark */ - entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; - tlb_miss = display->fifo_size*display->cacheline_size - - sprite_width * 8; - if (tlb_miss > 0) - entries += tlb_miss; - entries = DIV_ROUND_UP(entries, display->cacheline_size); - *sprite_wm = entries + display->guard_size; - if (*sprite_wm > (int)display->max_wm) - *sprite_wm = display->max_wm; - - return true; -} - -static bool -sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane, - uint32_t sprite_width, int pixel_size, - const struct intel_watermark_params *display, - int latency_ns, int *sprite_wm) -{ - struct drm_crtc *crtc; - unsigned long line_time_us; - int clock; - int line_count, line_size; - int small, large; - int entries; - - if (!latency_ns) { - *sprite_wm = 0; - return false; - } - - crtc = intel_get_crtc_for_plane(dev, plane); - clock = crtc->mode.clock; - if (!clock) { - *sprite_wm = 0; - return false; - } - - line_time_us = (sprite_width * 1000) / clock; - if (!line_time_us) { - *sprite_wm = 0; - return false; - } - - line_count = (latency_ns / line_time_us + 1000) / 1000; - line_size = sprite_width * pixel_size; - - /* Use the minimum of the small and large buffer method for primary */ - small = ((clock * pixel_size / 1000) * latency_ns) / 1000; - large = line_count * line_size; - - entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); - *sprite_wm = entries + display->guard_size; - - return *sprite_wm > 0x3ff ? false : true; -} - -static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe, - uint32_t sprite_width, int pixel_size) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */ - u32 val; - int sprite_wm, reg; - int ret; - - switch (pipe) { - case 0: - reg = WM0_PIPEA_ILK; - break; - case 1: - reg = WM0_PIPEB_ILK; - break; - case 2: - reg = WM0_PIPEC_IVB; - break; - default: - return; /* bad pipe */ - } - - ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size, - &sandybridge_display_wm_info, - latency, &sprite_wm); - if (!ret) { - DRM_DEBUG_KMS("failed to compute sprite wm for pipe %d\n", - pipe); - return; - } - - val = I915_READ(reg); - val &= ~WM0_PIPE_SPRITE_MASK; - I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT)); - DRM_DEBUG_KMS("sprite watermarks For pipe %d - %d\n", pipe, sprite_wm); - - - ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, - pixel_size, - &sandybridge_display_srwm_info, - SNB_READ_WM1_LATENCY() * 500, - &sprite_wm); - if (!ret) { - DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %d\n", - pipe); - return; - } - I915_WRITE(WM1S_LP_ILK, sprite_wm); - - /* Only IVB has two more LP watermarks for sprite */ - if (!IS_IVYBRIDGE(dev)) - return; - - ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, - pixel_size, - &sandybridge_display_srwm_info, - SNB_READ_WM2_LATENCY() * 500, - &sprite_wm); - if (!ret) { - DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %d\n", - pipe); - return; - } - I915_WRITE(WM2S_LP_IVB, sprite_wm); - - ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width, - pixel_size, - &sandybridge_display_srwm_info, - SNB_READ_WM3_LATENCY() * 500, - &sprite_wm); - if (!ret) { - DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %d\n", - pipe); - return; - } - I915_WRITE(WM3S_LP_IVB, sprite_wm); -} - -/** - * intel_update_watermarks - update FIFO watermark values based on current modes - * - * Calculate watermark values for the various WM regs based on current mode - * and plane configuration. - * - * There are several cases to deal with here: - * - normal (i.e. non-self-refresh) - * - self-refresh (SR) mode - * - lines are large relative to FIFO size (buffer can hold up to 2) - * - lines are small relative to FIFO size (buffer can hold more than 2 - * lines), so need to account for TLB latency - * - * The normal calculation is: - * watermark = dotclock * bytes per pixel * latency - * where latency is platform & configuration dependent (we assume pessimal - * values here). - * - * The SR calculation is: - * watermark = (trunc(latency/line time)+1) * surface width * - * bytes per pixel - * where - * line time = htotal / dotclock - * surface width = hdisplay for normal plane and 64 for cursor - * and latency is assumed to be high, as above. - * - * The final value programmed to the register should always be rounded up, - * and include an extra 2 entries to account for clock crossings. - * - * We don't use the sprite, so we can ignore that. And on Crestline we have - * to set the non-SR watermarks to 8. - */ -void intel_update_watermarks(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->display.update_wm) - dev_priv->display.update_wm(dev); -} - -void intel_update_linetime_watermarks(struct drm_device *dev, - int pipe, struct drm_display_mode *mode) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->display.update_linetime_wm) - dev_priv->display.update_linetime_wm(dev, pipe, mode); -} - -void intel_update_sprite_watermarks(struct drm_device *dev, int pipe, - uint32_t sprite_width, int pixel_size) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->display.update_sprite_wm) - dev_priv->display.update_sprite_wm(dev, pipe, sprite_width, - pixel_size); -} - -static struct drm_i915_gem_object * -intel_alloc_context_page(struct drm_device *dev) -{ - struct drm_i915_gem_object *ctx; - int ret; - - DRM_LOCK_ASSERT(dev); - - ctx = i915_gem_alloc_object(dev, 4096); - if (!ctx) { - DRM_DEBUG("failed to alloc power context, RC6 disabled\n"); - return NULL; - } - - ret = i915_gem_object_pin(ctx, 4096, true, false); - if (ret) { - DRM_ERROR("failed to pin power context: %d\n", ret); - goto err_unref; - } - - ret = i915_gem_object_set_to_gtt_domain(ctx, 1); - if (ret) { - DRM_ERROR("failed to set-domain on power context: %d\n", ret); - goto err_unpin; - } - - return ctx; - -err_unpin: - i915_gem_object_unpin(ctx); -err_unref: - drm_gem_object_unreference(&ctx->base); - DRM_UNLOCK(dev); - return NULL; -} - -/** - * Lock protecting IPS related data structures - */ -struct mtx mchdev_lock; -MTX_SYSINIT(mchdev, &mchdev_lock, "mchdev", MTX_DEF); - -/* Global for IPS driver to get at the current i915 device. Protected by - * mchdev_lock. */ -static struct drm_i915_private *i915_mch_dev; - -bool ironlake_set_drps(struct drm_device *dev, u8 val) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u16 rgvswctl; - - mtx_assert(&mchdev_lock, MA_OWNED); - - rgvswctl = I915_READ16(MEMSWCTL); - if (rgvswctl & MEMCTL_CMD_STS) { - DRM_DEBUG("gpu busy, RCS change rejected\n"); - return false; /* still busy with another command */ - } - - rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | - (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; - I915_WRITE16(MEMSWCTL, rgvswctl); - POSTING_READ16(MEMSWCTL); - - rgvswctl |= MEMCTL_CMD_STS; - I915_WRITE16(MEMSWCTL, rgvswctl); - - return true; -} - -static void ironlake_enable_drps(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 rgvmodectl = I915_READ(MEMMODECTL); - u8 fmax, fmin, fstart, vstart; - - mtx_lock(&mchdev_lock); - - /* Enable temp reporting */ - I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN); - I915_WRITE16(TSC1, I915_READ(TSC1) | TSE); - - /* 100ms RC evaluation intervals */ - I915_WRITE(RCUPEI, 100000); - I915_WRITE(RCDNEI, 100000); - - /* Set max/min thresholds to 90ms and 80ms respectively */ - I915_WRITE(RCBMAXAVG, 90000); - I915_WRITE(RCBMINAVG, 80000); - - I915_WRITE(MEMIHYST, 1); - - /* Set up min, max, and cur for interrupt handling */ - fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT; - fmin = (rgvmodectl & MEMMODE_FMIN_MASK); - fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >> - MEMMODE_FSTART_SHIFT; - - vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >> - PXVFREQ_PX_SHIFT; - - dev_priv->ips.fmax = fmax; /* IPS callback will increase this */ - dev_priv->ips.fstart = fstart; - - dev_priv->ips.max_delay = fstart; - dev_priv->ips.min_delay = fmin; - dev_priv->ips.cur_delay = fstart; - - DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n", - fmax, fmin, fstart); - - I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN); - - /* - * Interrupts will be enabled in ironlake_irq_postinstall - */ - - I915_WRITE(VIDSTART, vstart); - POSTING_READ(VIDSTART); - - rgvmodectl |= MEMMODE_SWMODE_EN; - I915_WRITE(MEMMODECTL, rgvmodectl); - - if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10)) - DRM_ERROR("stuck trying to change perf mode\n"); - mdelay(1); - - ironlake_set_drps(dev, fstart); - - dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) + - I915_READ(0x112e0); - dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies); - dev_priv->ips.last_count2 = I915_READ(0x112f4); - getrawmonotonic(&dev_priv->ips.last_time2); - - mtx_unlock(&mchdev_lock); -} - -static void ironlake_disable_drps(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u16 rgvswctl; - - mtx_lock(&mchdev_lock); - - rgvswctl = I915_READ16(MEMSWCTL); - - /* Ack interrupts, disable EFC interrupt */ - I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN); - I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG); - I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT); - I915_WRITE(DEIIR, DE_PCU_EVENT); - I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT); - - /* Go back to the starting frequency */ - ironlake_set_drps(dev, dev_priv->ips.fstart); - mdelay(1); - rgvswctl |= MEMCTL_CMD_STS; - I915_WRITE(MEMSWCTL, rgvswctl); - mdelay(1); - - mtx_unlock(&mchdev_lock); -} - -/* There's a funny hw issue where the hw returns all 0 when reading from - * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value - * ourselves, instead of doing a rmw cycle (which might result in us clearing - * all limits and the gpu stuck at whatever frequency it is at atm). - */ -static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 *val) -{ - u32 limits; - - limits = 0; - - if (*val >= dev_priv->rps.max_delay) - *val = dev_priv->rps.max_delay; - limits |= dev_priv->rps.max_delay << 24; - - /* Only set the down limit when we've reached the lowest level to avoid - * getting more interrupts, otherwise leave this clear. This prevents a - * race in the hw when coming out of rc6: There's a tiny window where - * the hw runs at the minimal clock before selecting the desired - * frequency, if the down threshold expires in that window we will not - * receive a down interrupt. */ - if (*val <= dev_priv->rps.min_delay) { - *val = dev_priv->rps.min_delay; - limits |= dev_priv->rps.min_delay << 16; - } - - return limits; -} - -void gen6_set_rps(struct drm_device *dev, u8 val) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 limits = gen6_rps_limits(dev_priv, &val); - - sx_assert(&dev_priv->rps.hw_lock, SA_XLOCKED); - WARN_ON(val > dev_priv->rps.max_delay); - WARN_ON(val < dev_priv->rps.min_delay); - - if (val == dev_priv->rps.cur_delay) - return; - - I915_WRITE(GEN6_RPNSWREQ, - GEN6_FREQUENCY(val) | - GEN6_OFFSET(0) | - GEN6_AGGRESSIVE_TURBO); - - /* Make sure we continue to get interrupts - * until we hit the minimum or maximum frequencies. - */ - I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits); - - POSTING_READ(GEN6_RPNSWREQ); - - dev_priv->rps.cur_delay = val; -} - -static void gen6_disable_rps(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - I915_WRITE(GEN6_RC_CONTROL, 0); - I915_WRITE(GEN6_RPNSWREQ, 1 << 31); - I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); - I915_WRITE(GEN6_PMIER, 0); - /* Complete PM interrupt masking here doesn't race with the rps work - * item again unmasking PM interrupts because that is using a different - * register (PMIMR) to mask PM interrupts. The only risk is in leaving - * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ - - mtx_lock(&dev_priv->rps.lock); - dev_priv->rps.pm_iir = 0; - mtx_unlock(&dev_priv->rps.lock); - - I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR)); -} - -int intel_enable_rc6(const struct drm_device *dev) -{ - /* Respect the kernel parameter if it is set */ - if (i915_enable_rc6 >= 0) - return i915_enable_rc6; - - /* Disable RC6 on Ironlake */ - if (INTEL_INFO(dev)->gen == 5) - return 0; - - if (IS_HASWELL(dev)) { - DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); - return INTEL_RC6_ENABLE; - } - - /* snb/ivb have more than one rc6 state. */ - if (INTEL_INFO(dev)->gen == 6) { - DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); - return INTEL_RC6_ENABLE; - } - - DRM_DEBUG_DRIVER("RC6 and deep RC6 enabled\n"); - return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); -} - -static void gen6_enable_rps(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_ring_buffer *ring; - u32 rp_state_cap; - u32 gt_perf_status; - u32 rc6vids, pcu_mbox, rc6_mask = 0; - u32 gtfifodbg; - int rc6_mode; - int i, ret; - - sx_assert(&dev_priv->rps.hw_lock, SA_XLOCKED); - - /* Here begins a magic sequence of register writes to enable - * auto-downclocking. - * - * Perhaps there might be some value in exposing these to - * userspace... - */ - I915_WRITE(GEN6_RC_STATE, 0); - - /* Clear the DBG now so we don't confuse earlier errors */ - if ((gtfifodbg = I915_READ(GTFIFODBG))) { - DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg); - I915_WRITE(GTFIFODBG, gtfifodbg); - } - - gen6_gt_force_wake_get(dev_priv); - - rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); - gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS); - - /* In units of 100MHz */ - dev_priv->rps.max_delay = rp_state_cap & 0xff; - dev_priv->rps.min_delay = (rp_state_cap & 0xff0000) >> 16; - dev_priv->rps.cur_delay = 0; - - /* disable the counters and set deterministic thresholds */ - I915_WRITE(GEN6_RC_CONTROL, 0); - - I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16); - I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30); - I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30); - I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); - I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); - - for_each_ring(ring, dev_priv, i) - I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); - - I915_WRITE(GEN6_RC_SLEEP, 0); - I915_WRITE(GEN6_RC1e_THRESHOLD, 1000); - I915_WRITE(GEN6_RC6_THRESHOLD, 50000); - I915_WRITE(GEN6_RC6p_THRESHOLD, 150000); - I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */ - - /* Check if we are enabling RC6 */ - rc6_mode = intel_enable_rc6(dev_priv->dev); - if (rc6_mode & INTEL_RC6_ENABLE) - rc6_mask |= GEN6_RC_CTL_RC6_ENABLE; - - /* We don't use those on Haswell */ - if (!IS_HASWELL(dev)) { - if (rc6_mode & INTEL_RC6p_ENABLE) - rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE; - - if (rc6_mode & INTEL_RC6pp_ENABLE) - rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE; - } - - DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", - (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", - (rc6_mask & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", - (rc6_mask & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); - - I915_WRITE(GEN6_RC_CONTROL, - rc6_mask | - GEN6_RC_CTL_EI_MODE(1) | - GEN6_RC_CTL_HW_ENABLE); - - I915_WRITE(GEN6_RPNSWREQ, - GEN6_FREQUENCY(10) | - GEN6_OFFSET(0) | - GEN6_AGGRESSIVE_TURBO); - I915_WRITE(GEN6_RC_VIDEO_FREQ, - GEN6_FREQUENCY(12)); - - I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000); - I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, - dev_priv->rps.max_delay << 24 | - dev_priv->rps.min_delay << 16); - - I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400); - I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000); - I915_WRITE(GEN6_RP_UP_EI, 66000); - I915_WRITE(GEN6_RP_DOWN_EI, 350000); - - I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); - I915_WRITE(GEN6_RP_CONTROL, - GEN6_RP_MEDIA_TURBO | - GEN6_RP_MEDIA_HW_NORMAL_MODE | - GEN6_RP_MEDIA_IS_GFX | - GEN6_RP_ENABLE | - GEN6_RP_UP_BUSY_AVG | - (IS_HASWELL(dev) ? GEN7_RP_DOWN_IDLE_AVG : GEN6_RP_DOWN_IDLE_CONT)); - - ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0); - if (!ret) { - pcu_mbox = 0; - ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox); - if (ret && pcu_mbox & (1<<31)) { /* OC supported */ - dev_priv->rps.max_delay = pcu_mbox & 0xff; - DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 50); - } - } else { - DRM_DEBUG_DRIVER("Failed to set the min frequency\n"); - } - - gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8); - - /* requires MSI enabled */ - I915_WRITE(GEN6_PMIER, GEN6_PM_DEFERRED_EVENTS); - mtx_lock(&dev_priv->rps.lock); - WARN_ON(dev_priv->rps.pm_iir != 0); - I915_WRITE(GEN6_PMIMR, 0); - mtx_unlock(&dev_priv->rps.lock); - /* enable all PM interrupts */ - I915_WRITE(GEN6_PMINTRMSK, 0); - - rc6vids = 0; - ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids); - if (IS_GEN6(dev) && ret) { - DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n"); - } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) { - DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n", - GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450); - rc6vids &= 0xffff00; - rc6vids |= GEN6_ENCODE_RC6_VID(450); - ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids); - if (ret) - DRM_ERROR("Couldn't fix incorrect rc6 voltage\n"); - } - - gen6_gt_force_wake_put(dev_priv); -} - -static void gen6_update_ring_freq(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int min_freq = 15; - int gpu_freq; - unsigned int ia_freq, max_ia_freq; - int scaling_factor = 180; - - sx_assert(&dev_priv->rps.hw_lock, SA_XLOCKED); - -#ifdef FREEBSD_WIP - max_ia_freq = cpufreq_quick_get_max(0); - /* - * Default to measured freq if none found, PCU will ensure we don't go - * over - */ - if (!max_ia_freq) - max_ia_freq = tsc_khz; -#else - uint64_t freq; - freq = atomic_load_acq_64(&tsc_freq); - max_ia_freq = freq / 1000; -#endif /* FREEBSD_WIP */ - - /* Convert from kHz to MHz */ - max_ia_freq /= 1000; - - /* - * For each potential GPU frequency, load a ring frequency we'd like - * to use for memory access. We do this by specifying the IA frequency - * the PCU should use as a reference to determine the ring frequency. - */ - for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay; - gpu_freq--) { - int diff = dev_priv->rps.max_delay - gpu_freq; - - /* - * For GPU frequencies less than 750MHz, just use the lowest - * ring freq. - */ - if (gpu_freq < min_freq) - ia_freq = 800; - else - ia_freq = max_ia_freq - ((diff * scaling_factor) / 2); - ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100); - ia_freq <<= GEN6_PCODE_FREQ_IA_RATIO_SHIFT; - - sandybridge_pcode_write(dev_priv, - GEN6_PCODE_WRITE_MIN_FREQ_TABLE, - ia_freq | gpu_freq); - } -} - -void ironlake_teardown_rc6(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->ips.renderctx) { - i915_gem_object_unpin(dev_priv->ips.renderctx); - drm_gem_object_unreference(&dev_priv->ips.renderctx->base); - dev_priv->ips.renderctx = NULL; - } - - if (dev_priv->ips.pwrctx) { - i915_gem_object_unpin(dev_priv->ips.pwrctx); - drm_gem_object_unreference(&dev_priv->ips.pwrctx->base); - dev_priv->ips.pwrctx = NULL; - } -} - -static void ironlake_disable_rc6(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (I915_READ(PWRCTXA)) { - /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */ - I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT); - wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON), - 50); - - I915_WRITE(PWRCTXA, 0); - POSTING_READ(PWRCTXA); - - I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); - POSTING_READ(RSTDBYCTL); - } -} - -static int ironlake_setup_rc6(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->ips.renderctx == NULL) - dev_priv->ips.renderctx = intel_alloc_context_page(dev); - if (!dev_priv->ips.renderctx) - return -ENOMEM; - - if (dev_priv->ips.pwrctx == NULL) - dev_priv->ips.pwrctx = intel_alloc_context_page(dev); - if (!dev_priv->ips.pwrctx) { - ironlake_teardown_rc6(dev); - return -ENOMEM; - } - - return 0; -} - -static void ironlake_enable_rc6(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; - bool was_interruptible; - int ret; - - /* rc6 disabled by default due to repeated reports of hanging during - * boot and resume. - */ - if (!intel_enable_rc6(dev)) - return; - - DRM_LOCK_ASSERT(dev); - - ret = ironlake_setup_rc6(dev); - if (ret) - return; - - was_interruptible = dev_priv->mm.interruptible; - dev_priv->mm.interruptible = false; - - /* - * GPU can automatically power down the render unit if given a page - * to save state. - */ - ret = intel_ring_begin(ring, 6); - if (ret) { - ironlake_teardown_rc6(dev); - dev_priv->mm.interruptible = was_interruptible; - return; - } - - intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN); - intel_ring_emit(ring, MI_SET_CONTEXT); - intel_ring_emit(ring, dev_priv->ips.renderctx->gtt_offset | - MI_MM_SPACE_GTT | - MI_SAVE_EXT_STATE_EN | - MI_RESTORE_EXT_STATE_EN | - MI_RESTORE_INHIBIT); - intel_ring_emit(ring, MI_SUSPEND_FLUSH); - intel_ring_emit(ring, MI_NOOP); - intel_ring_emit(ring, MI_FLUSH); - intel_ring_advance(ring); - - /* - * Wait for the command parser to advance past MI_SET_CONTEXT. The HW - * does an implicit flush, combined with MI_FLUSH above, it should be - * safe to assume that renderctx is valid - */ - ret = intel_ring_idle(ring); - dev_priv->mm.interruptible = was_interruptible; - if (ret) { - DRM_ERROR("failed to enable ironlake power power savings\n"); - ironlake_teardown_rc6(dev); - return; - } - - I915_WRITE(PWRCTXA, dev_priv->ips.pwrctx->gtt_offset | PWRCTX_EN); - I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); -} - -static unsigned long intel_pxfreq(u32 vidfreq) -{ - unsigned long freq; - int div = (vidfreq & 0x3f0000) >> 16; - int post = (vidfreq & 0x3000) >> 12; - int pre = (vidfreq & 0x7); - - if (!pre) - return 0; - - freq = ((div * 133333) / ((1<<post) * pre)); - - return freq; -} - -static const struct cparams { - u16 i; - u16 t; - u16 m; - u16 c; -} cparams[] = { - { 1, 1333, 301, 28664 }, - { 1, 1066, 294, 24460 }, - { 1, 800, 294, 25192 }, - { 0, 1333, 276, 27605 }, - { 0, 1066, 276, 27605 }, - { 0, 800, 231, 23784 }, -}; - -static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv) -{ - u64 total_count, diff, ret; - u32 count1, count2, count3, m = 0, c = 0; - unsigned long now = jiffies_to_msecs(jiffies), diff1; - int i; - - mtx_assert(&mchdev_lock, MA_OWNED); - - diff1 = now - dev_priv->ips.last_time1; - - /* Prevent division-by-zero if we are asking too fast. - * Also, we don't get interesting results if we are polling - * faster than once in 10ms, so just return the saved value - * in such cases. - */ - if (diff1 <= 10) - return dev_priv->ips.chipset_power; - - count1 = I915_READ(DMIEC); - count2 = I915_READ(DDREC); - count3 = I915_READ(CSIEC); - - total_count = count1 + count2 + count3; - - /* FIXME: handle per-counter overflow */ - if (total_count < dev_priv->ips.last_count1) { - diff = ~0UL - dev_priv->ips.last_count1; - diff += total_count; - } else { - diff = total_count - dev_priv->ips.last_count1; - } - - for (i = 0; i < ARRAY_SIZE(cparams); i++) { - if (cparams[i].i == dev_priv->ips.c_m && - cparams[i].t == dev_priv->ips.r_t) { - m = cparams[i].m; - c = cparams[i].c; - break; - } - } - - diff = div_u64(diff, diff1); - ret = ((m * diff) + c); - ret = div_u64(ret, 10); - - dev_priv->ips.last_count1 = total_count; - dev_priv->ips.last_time1 = now; - - dev_priv->ips.chipset_power = ret; - - return ret; -} - -unsigned long i915_chipset_val(struct drm_i915_private *dev_priv) -{ - unsigned long val; - - if (dev_priv->info->gen != 5) - return 0; - - mtx_lock(&mchdev_lock); - - val = __i915_chipset_val(dev_priv); - - mtx_unlock(&mchdev_lock); - - return val; -} - -unsigned long i915_mch_val(struct drm_i915_private *dev_priv) -{ - unsigned long m, x, b; - u32 tsfs; - - tsfs = I915_READ(TSFS); - - m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT); - x = I915_READ8(I915_TR1); - - b = tsfs & TSFS_INTR_MASK; - - return ((m * x) / 127) - b; -} - -static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid) -{ - static const struct v_table { - u16 vd; /* in .1 mil */ - u16 vm; /* in .1 mil */ - } v_table[] = { - { 0, 0, }, - { 375, 0, }, - { 500, 0, }, - { 625, 0, }, - { 750, 0, }, - { 875, 0, }, - { 1000, 0, }, - { 1125, 0, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4125, 3000, }, - { 4250, 3125, }, - { 4375, 3250, }, - { 4500, 3375, }, - { 4625, 3500, }, - { 4750, 3625, }, - { 4875, 3750, }, - { 5000, 3875, }, - { 5125, 4000, }, - { 5250, 4125, }, - { 5375, 4250, }, - { 5500, 4375, }, - { 5625, 4500, }, - { 5750, 4625, }, - { 5875, 4750, }, - { 6000, 4875, }, - { 6125, 5000, }, - { 6250, 5125, }, - { 6375, 5250, }, - { 6500, 5375, }, - { 6625, 5500, }, - { 6750, 5625, }, - { 6875, 5750, }, - { 7000, 5875, }, - { 7125, 6000, }, - { 7250, 6125, }, - { 7375, 6250, }, - { 7500, 6375, }, - { 7625, 6500, }, - { 7750, 6625, }, - { 7875, 6750, }, - { 8000, 6875, }, - { 8125, 7000, }, - { 8250, 7125, }, - { 8375, 7250, }, - { 8500, 7375, }, - { 8625, 7500, }, - { 8750, 7625, }, - { 8875, 7750, }, - { 9000, 7875, }, - { 9125, 8000, }, - { 9250, 8125, }, - { 9375, 8250, }, - { 9500, 8375, }, - { 9625, 8500, }, - { 9750, 8625, }, - { 9875, 8750, }, - { 10000, 8875, }, - { 10125, 9000, }, - { 10250, 9125, }, - { 10375, 9250, }, - { 10500, 9375, }, - { 10625, 9500, }, - { 10750, 9625, }, - { 10875, 9750, }, - { 11000, 9875, }, - { 11125, 10000, }, - { 11250, 10125, }, - { 11375, 10250, }, - { 11500, 10375, }, - { 11625, 10500, }, - { 11750, 10625, }, - { 11875, 10750, }, - { 12000, 10875, }, - { 12125, 11000, }, - { 12250, 11125, }, - { 12375, 11250, }, - { 12500, 11375, }, - { 12625, 11500, }, - { 12750, 11625, }, - { 12875, 11750, }, - { 13000, 11875, }, - { 13125, 12000, }, - { 13250, 12125, }, - { 13375, 12250, }, - { 13500, 12375, }, - { 13625, 12500, }, - { 13750, 12625, }, - { 13875, 12750, }, - { 14000, 12875, }, - { 14125, 13000, }, - { 14250, 13125, }, - { 14375, 13250, }, - { 14500, 13375, }, - { 14625, 13500, }, - { 14750, 13625, }, - { 14875, 13750, }, - { 15000, 13875, }, - { 15125, 14000, }, - { 15250, 14125, }, - { 15375, 14250, }, - { 15500, 14375, }, - { 15625, 14500, }, - { 15750, 14625, }, - { 15875, 14750, }, - { 16000, 14875, }, - { 16125, 15000, }, - }; - if (dev_priv->info->is_mobile) - return v_table[pxvid].vm; - else - return v_table[pxvid].vd; -} - -static void __i915_update_gfx_val(struct drm_i915_private *dev_priv) -{ - struct timespec now, diff1; - u64 diff; - unsigned long diffms; - u32 count; - - mtx_assert(&mchdev_lock, MA_OWNED); - - nanotime(&now); - timespecsub(&now, &dev_priv->ips.last_time2, &diff1); - - /* Don't divide by 0 */ - diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000; - if (!diffms) - return; - - count = I915_READ(GFXEC); - - if (count < dev_priv->ips.last_count2) { - diff = ~0UL - dev_priv->ips.last_count2; - diff += count; - } else { - diff = count - dev_priv->ips.last_count2; - } - - dev_priv->ips.last_count2 = count; - dev_priv->ips.last_time2 = now; - - /* More magic constants... */ - diff = diff * 1181; - diff = div_u64(diff, diffms * 10); - dev_priv->ips.gfx_power = diff; -} - -void i915_update_gfx_val(struct drm_i915_private *dev_priv) -{ - if (dev_priv->info->gen != 5) - return; - - mtx_lock(&mchdev_lock); - - __i915_update_gfx_val(dev_priv); - - mtx_unlock(&mchdev_lock); -} - -static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv) -{ - unsigned long t, corr, state1, corr2, state2; - u32 pxvid, ext_v; - - mtx_assert(&mchdev_lock, MA_OWNED); - - pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4)); - pxvid = (pxvid >> 24) & 0x7f; - ext_v = pvid_to_extvid(dev_priv, pxvid); - - state1 = ext_v; - - t = i915_mch_val(dev_priv); - - /* Revel in the empirically derived constants */ - - /* Correction factor in 1/100000 units */ - if (t > 80) - corr = ((t * 2349) + 135940); - else if (t >= 50) - corr = ((t * 964) + 29317); - else /* < 50 */ - corr = ((t * 301) + 1004); - - corr = corr * ((150142 * state1) / 10000 - 78642); - corr /= 100000; - corr2 = (corr * dev_priv->ips.corr); - - state2 = (corr2 * state1) / 10000; - state2 /= 100; /* convert to mW */ - - __i915_update_gfx_val(dev_priv); - - return dev_priv->ips.gfx_power + state2; -} - -unsigned long i915_gfx_val(struct drm_i915_private *dev_priv) -{ - unsigned long val; - - if (dev_priv->info->gen != 5) - return 0; - - mtx_lock(&mchdev_lock); - - val = __i915_gfx_val(dev_priv); - - mtx_unlock(&mchdev_lock); - - return val; -} - -/** - * i915_read_mch_val - return value for IPS use - * - * Calculate and return a value for the IPS driver to use when deciding whether - * we have thermal and power headroom to increase CPU or GPU power budget. - */ -unsigned long i915_read_mch_val(void) -{ - struct drm_i915_private *dev_priv; - unsigned long chipset_val, graphics_val, ret = 0; - - mtx_lock(&mchdev_lock); - if (!i915_mch_dev) - goto out_unlock; - dev_priv = i915_mch_dev; - - chipset_val = __i915_chipset_val(dev_priv); - graphics_val = __i915_gfx_val(dev_priv); - - ret = chipset_val + graphics_val; - -out_unlock: - mtx_unlock(&mchdev_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(i915_read_mch_val); - -/** - * i915_gpu_raise - raise GPU frequency limit - * - * Raise the limit; IPS indicates we have thermal headroom. - */ -bool i915_gpu_raise(void) -{ - struct drm_i915_private *dev_priv; - bool ret = true; - - mtx_lock(&mchdev_lock); - if (!i915_mch_dev) { - ret = false; - goto out_unlock; - } - dev_priv = i915_mch_dev; - - if (dev_priv->ips.max_delay > dev_priv->ips.fmax) - dev_priv->ips.max_delay--; - -out_unlock: - mtx_unlock(&mchdev_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(i915_gpu_raise); - -/** - * i915_gpu_lower - lower GPU frequency limit - * - * IPS indicates we're close to a thermal limit, so throttle back the GPU - * frequency maximum. - */ -bool i915_gpu_lower(void) -{ - struct drm_i915_private *dev_priv; - bool ret = true; - - mtx_lock(&mchdev_lock); - if (!i915_mch_dev) { - ret = false; - goto out_unlock; - } - dev_priv = i915_mch_dev; - - if (dev_priv->ips.max_delay < dev_priv->ips.min_delay) - dev_priv->ips.max_delay++; - -out_unlock: - mtx_unlock(&mchdev_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(i915_gpu_lower); - -/** - * i915_gpu_busy - indicate GPU business to IPS - * - * Tell the IPS driver whether or not the GPU is busy. - */ -bool i915_gpu_busy(void) -{ - struct drm_i915_private *dev_priv; - struct intel_ring_buffer *ring; - bool ret = false; - int i; - - mtx_lock(&mchdev_lock); - if (!i915_mch_dev) - goto out_unlock; - dev_priv = i915_mch_dev; - - for_each_ring(ring, dev_priv, i) - ret |= !list_empty(&ring->request_list); - -out_unlock: - mtx_unlock(&mchdev_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(i915_gpu_busy); - -/** - * i915_gpu_turbo_disable - disable graphics turbo - * - * Disable graphics turbo by resetting the max frequency and setting the - * current frequency to the default. - */ -bool i915_gpu_turbo_disable(void) -{ - struct drm_i915_private *dev_priv; - bool ret = true; - - mtx_lock(&mchdev_lock); - if (!i915_mch_dev) { - ret = false; - goto out_unlock; - } - dev_priv = i915_mch_dev; - - dev_priv->ips.max_delay = dev_priv->ips.fstart; - - if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart)) - ret = false; - -out_unlock: - mtx_unlock(&mchdev_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); - -#ifdef FREEBSD_WIP -/** - * Tells the intel_ips driver that the i915 driver is now loaded, if - * IPS got loaded first. - * - * This awkward dance is so that neither module has to depend on the - * other in order for IPS to do the appropriate communication of - * GPU turbo limits to i915. - */ -static void -ips_ping_for_i915_load(void) -{ - void (*link)(void); - - link = symbol_get(ips_link_to_i915_driver); - if (link) { - link(); - symbol_put(ips_link_to_i915_driver); - } -} -#endif /* FREEBSD_WIP */ - -void intel_gpu_ips_init(struct drm_i915_private *dev_priv) -{ - /* We only register the i915 ips part with intel-ips once everything is - * set up, to avoid intel-ips sneaking in and reading bogus values. */ - mtx_lock(&mchdev_lock); - i915_mch_dev = dev_priv; - mtx_unlock(&mchdev_lock); - -#ifdef FREEBSD_WIP - ips_ping_for_i915_load(); -#endif /* FREEBSD_WIP */ -} - -void intel_gpu_ips_teardown(void) -{ - mtx_lock(&mchdev_lock); - i915_mch_dev = NULL; - mtx_unlock(&mchdev_lock); -} -static void intel_init_emon(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 lcfuse; - u8 pxw[16]; - int i; - - /* Disable to program */ - I915_WRITE(ECR, 0); - POSTING_READ(ECR); - - /* Program energy weights for various events */ - I915_WRITE(SDEW, 0x15040d00); - I915_WRITE(CSIEW0, 0x007f0000); - I915_WRITE(CSIEW1, 0x1e220004); - I915_WRITE(CSIEW2, 0x04000004); - - for (i = 0; i < 5; i++) - I915_WRITE(PEW + (i * 4), 0); - for (i = 0; i < 3; i++) - I915_WRITE(DEW + (i * 4), 0); - - /* Program P-state weights to account for frequency power adjustment */ - for (i = 0; i < 16; i++) { - u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4)); - unsigned long freq = intel_pxfreq(pxvidfreq); - unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >> - PXVFREQ_PX_SHIFT; - unsigned long val; - - val = vid * vid; - val *= (freq / 1000); - val *= 255; - val /= (127*127*900); - if (val > 0xff) - DRM_ERROR("bad pxval: %ld\n", val); - pxw[i] = val; - } - /* Render standby states get 0 weight */ - pxw[14] = 0; - pxw[15] = 0; - - for (i = 0; i < 4; i++) { - u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) | - (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]); - I915_WRITE(PXW + (i * 4), val); - } - - /* Adjust magic regs to magic values (more experimental results) */ - I915_WRITE(OGW0, 0); - I915_WRITE(OGW1, 0); - I915_WRITE(EG0, 0x00007f00); - I915_WRITE(EG1, 0x0000000e); - I915_WRITE(EG2, 0x000e0000); - I915_WRITE(EG3, 0x68000300); - I915_WRITE(EG4, 0x42000000); - I915_WRITE(EG5, 0x00140031); - I915_WRITE(EG6, 0); - I915_WRITE(EG7, 0); - - for (i = 0; i < 8; i++) - I915_WRITE(PXWL + (i * 4), 0); - - /* Enable PMON + select events */ - I915_WRITE(ECR, 0x80000019); - - lcfuse = I915_READ(LCFUSE02); - - dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK); -} - -void intel_disable_gt_powersave(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (IS_IRONLAKE_M(dev)) { - ironlake_disable_drps(dev); - ironlake_disable_rc6(dev); - } else if (INTEL_INFO(dev)->gen >= 6 && !IS_VALLEYVIEW(dev)) { - taskqueue_cancel_timeout(dev_priv->wq, &dev_priv->rps.delayed_resume_work, NULL); - sx_xlock(&dev_priv->rps.hw_lock); - gen6_disable_rps(dev); - sx_xunlock(&dev_priv->rps.hw_lock); - } -} - -static void intel_gen6_powersave_work(void *arg, int pending) -{ - struct drm_i915_private *dev_priv = arg; - struct drm_device *dev = dev_priv->dev; - - sx_xlock(&dev_priv->rps.hw_lock); - gen6_enable_rps(dev); - gen6_update_ring_freq(dev); - sx_xunlock(&dev_priv->rps.hw_lock); -} - -void intel_enable_gt_powersave(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (IS_IRONLAKE_M(dev)) { - ironlake_enable_drps(dev); - ironlake_enable_rc6(dev); - intel_init_emon(dev); - } else if ((IS_GEN6(dev) || IS_GEN7(dev)) && !IS_VALLEYVIEW(dev)) { - /* - * PCU communication is slow and this doesn't need to be - * done at any specific time, so do this out of our fast path - * to make resume and init faster. - */ - taskqueue_enqueue_timeout(dev_priv->wq, &dev_priv->rps.delayed_resume_work, - round_jiffies_up_relative(HZ)); - } -} - -static void ibx_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - /* - * On Ibex Peak and Cougar Point, we need to disable clock - * gating for the panel power sequencer or it will fail to - * start up when no ports are active. - */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); -} - -static void ironlake_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; - - /* Required for FBC */ - dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE | - ILK_DPFCUNIT_CLOCK_GATE_DISABLE | - ILK_DPFDUNIT_CLOCK_GATE_ENABLE; - - I915_WRITE(PCH_3DCGDIS0, - MARIUNIT_CLOCK_GATE_DISABLE | - SVSMUNIT_CLOCK_GATE_DISABLE); - I915_WRITE(PCH_3DCGDIS1, - VFMUNIT_CLOCK_GATE_DISABLE); - - /* - * According to the spec the following bits should be set in - * order to enable memory self-refresh - * The bit 22/21 of 0x42004 - * The bit 5 of 0x42020 - * The bit 15 of 0x45000 - */ - I915_WRITE(ILK_DISPLAY_CHICKEN2, - (I915_READ(ILK_DISPLAY_CHICKEN2) | - ILK_DPARB_GATE | ILK_VSDPFD_FULL)); - dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE; - I915_WRITE(DISP_ARB_CTL, - (I915_READ(DISP_ARB_CTL) | - DISP_FBC_WM_DIS)); - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - /* - * Based on the document from hardware guys the following bits - * should be set unconditionally in order to enable FBC. - * The bit 22 of 0x42000 - * The bit 22 of 0x42004 - * The bit 7,8,9 of 0x42020. - */ - if (IS_IRONLAKE_M(dev)) { - I915_WRITE(ILK_DISPLAY_CHICKEN1, - I915_READ(ILK_DISPLAY_CHICKEN1) | - ILK_FBCQ_DIS); - I915_WRITE(ILK_DISPLAY_CHICKEN2, - I915_READ(ILK_DISPLAY_CHICKEN2) | - ILK_DPARB_GATE); - } - - I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); - - I915_WRITE(ILK_DISPLAY_CHICKEN2, - I915_READ(ILK_DISPLAY_CHICKEN2) | - ILK_ELPIN_409_SELECT); - I915_WRITE(_3D_CHICKEN2, - _3D_CHICKEN2_WM_READ_PIPELINED << 16 | - _3D_CHICKEN2_WM_READ_PIPELINED); - - /* WaDisableRenderCachePipelinedFlush */ - I915_WRITE(CACHE_MODE_0, - _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); - - ibx_init_clock_gating(dev); -} - -static void cpt_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int pipe; - uint32_t val; - - /* - * On Ibex Peak and Cougar Point, we need to disable clock - * gating for the panel power sequencer or it will fail to - * start up when no ports are active. - */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); - I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | - DPLS_EDP_PPS_FIX_DIS); - /* The below fixes the weird display corruption, a few pixels shifted - * downward, on (only) LVDS of some HP laptops with IVY. - */ - for_each_pipe(pipe) { - val = TRANS_CHICKEN2_TIMING_OVERRIDE; - if (dev_priv->fdi_rx_polarity_inverted) - val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED; - I915_WRITE(TRANS_CHICKEN2(pipe), val); - } - /* WADP0ClockGatingDisable */ - for_each_pipe(pipe) { - I915_WRITE(TRANS_CHICKEN1(pipe), - TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); - } -} - -static void gen6_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int pipe; - uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; - - I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); - - I915_WRITE(ILK_DISPLAY_CHICKEN2, - I915_READ(ILK_DISPLAY_CHICKEN2) | - ILK_ELPIN_409_SELECT); - - /* WaDisableHiZPlanesWhenMSAAEnabled */ - I915_WRITE(_3D_CHICKEN, - _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB)); - - /* WaSetupGtModeTdRowDispatch */ - if (IS_SNB_GT1(dev)) - I915_WRITE(GEN6_GT_MODE, - _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE)); - - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - I915_WRITE(CACHE_MODE_0, - _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); - - I915_WRITE(GEN6_UCGCTL1, - I915_READ(GEN6_UCGCTL1) | - GEN6_BLBUNIT_CLOCK_GATE_DISABLE | - GEN6_CSUNIT_CLOCK_GATE_DISABLE); - - /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock - * gating disable must be set. Failure to set it results in - * flickering pixels due to Z write ordering failures after - * some amount of runtime in the Mesa "fire" demo, and Unigine - * Sanctuary and Tropics, and apparently anything else with - * alpha test or pixel discard. - * - * According to the spec, bit 11 (RCCUNIT) must also be set, - * but we didn't debug actual testcases to find it out. - * - * Also apply WaDisableVDSUnitClockGating and - * WaDisableRCPBUnitClockGating. - */ - I915_WRITE(GEN6_UCGCTL2, - GEN7_VDSUNIT_CLOCK_GATE_DISABLE | - GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | - GEN6_RCCUNIT_CLOCK_GATE_DISABLE); - - /* Bspec says we need to always set all mask bits. */ - I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) | - _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL); - - /* - * According to the spec the following bits should be - * set in order to enable memory self-refresh and fbc: - * The bit21 and bit22 of 0x42000 - * The bit21 and bit22 of 0x42004 - * The bit5 and bit7 of 0x42020 - * The bit14 of 0x70180 - * The bit14 of 0x71180 - */ - I915_WRITE(ILK_DISPLAY_CHICKEN1, - I915_READ(ILK_DISPLAY_CHICKEN1) | - ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS); - I915_WRITE(ILK_DISPLAY_CHICKEN2, - I915_READ(ILK_DISPLAY_CHICKEN2) | - ILK_DPARB_GATE | ILK_VSDPFD_FULL); - I915_WRITE(ILK_DSPCLK_GATE_D, - I915_READ(ILK_DSPCLK_GATE_D) | - ILK_DPARBUNIT_CLOCK_GATE_ENABLE | - ILK_DPFDUNIT_CLOCK_GATE_ENABLE); - - -#ifdef FREEBSD_WIP - /* NOTE Linux<->FreeBSD: Disable GEN6_MBCTL write. - * - * This arrived in Linux 3.6 in commit - * b4ae3f22d238617ca11610b29fde16cf8c0bc6e0 and causes significantly - * increased power consumption after kldloading i915kms.ko on FreeBSD - * on (some) Sandy Bridge laptops. A Thinkpad X220 reported about 11W - * after booting while idle at the vt(4) console and about double that - * after loading the driver. - * - * There were reports in Linux of increased consumption after a suspend - * and resume cycle due to that change. - * - * Linux bug reports: - * https://bugs.freedesktop.org/show_bug.cgi?id=54089 - * https://bugzilla.kernel.org/show_bug.cgi?id=58971 - * - * This suspend and resume issue is reportedly fixed in Linux with - * commits 7dcd2677ea912573d9ed4bcd629b0023b2d11505 and - * 7dcd2677ea912573d9ed4bcd629b0023b2d11505 (Linux 3.11). However, I - * found that those changes did not help on FreeBSD, where increased - * power consumption is observed after loading i915kms.ko without - * suspending and resuming. - * - * This workaround should be removed after updating to a future Linux - * i915 version and verifying normal power consumption on Sandy Bridge. - */ - - /* WaMbcDriverBootEnable */ - I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | - GEN6_MBCTL_ENABLE_BOOT_FETCH); -#endif /* FREEBSD_WIP */ - - for_each_pipe(pipe) { - I915_WRITE(DSPCNTR(pipe), - I915_READ(DSPCNTR(pipe)) | - DISPPLANE_TRICKLE_FEED_DISABLE); - intel_flush_display_plane(dev_priv, pipe); - } - - /* The default value should be 0x200 according to docs, but the two - * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */ - I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff)); - I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI)); - - cpt_init_clock_gating(dev); -} - -static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv) -{ - uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE); - - reg &= ~GEN7_FF_SCHED_MASK; - reg |= GEN7_FF_TS_SCHED_HW; - reg |= GEN7_FF_VS_SCHED_HW; - reg |= GEN7_FF_DS_SCHED_HW; - - I915_WRITE(GEN7_FF_THREAD_MODE, reg); -} - -static void lpt_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - /* - * TODO: this bit should only be enabled when really needed, then - * disabled when not needed anymore in order to save power. - */ - if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) - I915_WRITE(SOUTH_DSPCLK_GATE_D, - I915_READ(SOUTH_DSPCLK_GATE_D) | - PCH_LP_PARTITION_LEVEL_DISABLE); -} - -static void haswell_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int pipe; - - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - /* According to the spec, bit 13 (RCZUNIT) must be set on IVB. - * This implements the WaDisableRCZUnitClockGating workaround. - */ - I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); - - /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ - I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, - GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); - - /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ - I915_WRITE(GEN7_L3CNTLREG1, - GEN7_WA_FOR_GEN7_L3_CONTROL); - I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, - GEN7_WA_L3_CHICKEN_MODE); - - /* This is required by WaCatErrorRejectionIssue */ - I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, - I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | - GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); - - for_each_pipe(pipe) { - I915_WRITE(DSPCNTR(pipe), - I915_READ(DSPCNTR(pipe)) | - DISPPLANE_TRICKLE_FEED_DISABLE); - intel_flush_display_plane(dev_priv, pipe); - } - - gen7_setup_fixed_func_scheduler(dev_priv); - - /* WaDisable4x2SubspanOptimization */ - I915_WRITE(CACHE_MODE_1, - _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); - - /* WaMbcDriverBootEnable */ - I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | - GEN6_MBCTL_ENABLE_BOOT_FETCH); - - /* XXX: This is a workaround for early silicon revisions and should be - * removed later. - */ - I915_WRITE(WM_DBG, - I915_READ(WM_DBG) | - WM_DBG_DISALLOW_MULTIPLE_LP | - WM_DBG_DISALLOW_SPRITE | - WM_DBG_DISALLOW_MAXFIFO); - - lpt_init_clock_gating(dev); -} - -static void ivybridge_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int pipe; - uint32_t snpcr; - - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); - - /* WaDisableEarlyCull */ - I915_WRITE(_3D_CHICKEN3, - _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); - - /* WaDisableBackToBackFlipFix */ - I915_WRITE(IVB_CHICKEN3, - CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | - CHICKEN3_DGMG_DONE_FIX_DISABLE); - - /* WaDisablePSDDualDispatchEnable */ - if (IS_IVB_GT1(dev)) - I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, - _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); - else - I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2, - _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); - - /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ - I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, - GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); - - /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ - I915_WRITE(GEN7_L3CNTLREG1, - GEN7_WA_FOR_GEN7_L3_CONTROL); - I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, - GEN7_WA_L3_CHICKEN_MODE); - if (IS_IVB_GT1(dev)) - I915_WRITE(GEN7_ROW_CHICKEN2, - _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); - else - I915_WRITE(GEN7_ROW_CHICKEN2_GT2, - _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); - - - /* WaForceL3Serialization */ - I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & - ~L3SQ_URB_READ_CAM_MATCH_DISABLE); - - /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock - * gating disable must be set. Failure to set it results in - * flickering pixels due to Z write ordering failures after - * some amount of runtime in the Mesa "fire" demo, and Unigine - * Sanctuary and Tropics, and apparently anything else with - * alpha test or pixel discard. - * - * According to the spec, bit 11 (RCCUNIT) must also be set, - * but we didn't debug actual testcases to find it out. - * - * According to the spec, bit 13 (RCZUNIT) must be set on IVB. - * This implements the WaDisableRCZUnitClockGating workaround. - */ - I915_WRITE(GEN6_UCGCTL2, - GEN6_RCZUNIT_CLOCK_GATE_DISABLE | - GEN6_RCCUNIT_CLOCK_GATE_DISABLE); - - /* This is required by WaCatErrorRejectionIssue */ - I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, - I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | - GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); - - for_each_pipe(pipe) { - I915_WRITE(DSPCNTR(pipe), - I915_READ(DSPCNTR(pipe)) | - DISPPLANE_TRICKLE_FEED_DISABLE); - intel_flush_display_plane(dev_priv, pipe); - } - - /* WaMbcDriverBootEnable */ - I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | - GEN6_MBCTL_ENABLE_BOOT_FETCH); - - gen7_setup_fixed_func_scheduler(dev_priv); - - /* WaDisable4x2SubspanOptimization */ - I915_WRITE(CACHE_MODE_1, - _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); - - snpcr = I915_READ(GEN6_MBCUNIT_SNPCR); - snpcr &= ~GEN6_MBC_SNPCR_MASK; - snpcr |= GEN6_MBC_SNPCR_MED; - I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr); - - cpt_init_clock_gating(dev); -} - -static void valleyview_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - int pipe; - - I915_WRITE(WM3_LP_ILK, 0); - I915_WRITE(WM2_LP_ILK, 0); - I915_WRITE(WM1_LP_ILK, 0); - - I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); - - /* WaDisableEarlyCull */ - I915_WRITE(_3D_CHICKEN3, - _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); - - /* WaDisableBackToBackFlipFix */ - I915_WRITE(IVB_CHICKEN3, - CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | - CHICKEN3_DGMG_DONE_FIX_DISABLE); - - I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, - _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); - - /* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */ - I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, - GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); - - /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ - I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS); - I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); - - /* WaForceL3Serialization */ - I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & - ~L3SQ_URB_READ_CAM_MATCH_DISABLE); - - /* WaDisableDopClockGating */ - I915_WRITE(GEN7_ROW_CHICKEN2, - _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); - - /* WaForceL3Serialization */ - I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & - ~L3SQ_URB_READ_CAM_MATCH_DISABLE); - - /* This is required by WaCatErrorRejectionIssue */ - I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, - I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | - GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); - - /* WaMbcDriverBootEnable */ - I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | - GEN6_MBCTL_ENABLE_BOOT_FETCH); - - - /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock - * gating disable must be set. Failure to set it results in - * flickering pixels due to Z write ordering failures after - * some amount of runtime in the Mesa "fire" demo, and Unigine - * Sanctuary and Tropics, and apparently anything else with - * alpha test or pixel discard. - * - * According to the spec, bit 11 (RCCUNIT) must also be set, - * but we didn't debug actual testcases to find it out. - * - * According to the spec, bit 13 (RCZUNIT) must be set on IVB. - * This implements the WaDisableRCZUnitClockGating workaround. - * - * Also apply WaDisableVDSUnitClockGating and - * WaDisableRCPBUnitClockGating. - */ - I915_WRITE(GEN6_UCGCTL2, - GEN7_VDSUNIT_CLOCK_GATE_DISABLE | - GEN7_TDLUNIT_CLOCK_GATE_DISABLE | - GEN6_RCZUNIT_CLOCK_GATE_DISABLE | - GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | - GEN6_RCCUNIT_CLOCK_GATE_DISABLE); - - I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE); - - for_each_pipe(pipe) { - I915_WRITE(DSPCNTR(pipe), - I915_READ(DSPCNTR(pipe)) | - DISPPLANE_TRICKLE_FEED_DISABLE); - intel_flush_display_plane(dev_priv, pipe); - } - - I915_WRITE(CACHE_MODE_1, - _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); - - /* - * On ValleyView, the GUnit needs to signal the GT - * when flip and other events complete. So enable - * all the GUnit->GT interrupts here - */ - I915_WRITE(VLV_DPFLIPSTAT, PIPEB_LINE_COMPARE_INT_EN | - PIPEB_HLINE_INT_EN | PIPEB_VBLANK_INT_EN | - SPRITED_FLIPDONE_INT_EN | SPRITEC_FLIPDONE_INT_EN | - PLANEB_FLIPDONE_INT_EN | PIPEA_LINE_COMPARE_INT_EN | - PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN | - SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN | - PLANEA_FLIPDONE_INT_EN); - - /* - * WaDisableVLVClockGating_VBIIssue - * Disable clock gating on th GCFG unit to prevent a delay - * in the reporting of vblank events. - */ - I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS); -} - -static void g4x_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t dspclk_gate; - - I915_WRITE(RENCLK_GATE_D1, 0); - I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE | - GS_UNIT_CLOCK_GATE_DISABLE | - CL_UNIT_CLOCK_GATE_DISABLE); - I915_WRITE(RAMCLK_GATE_D, 0); - dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE | - OVRUNIT_CLOCK_GATE_DISABLE | - OVCUNIT_CLOCK_GATE_DISABLE; - if (IS_GM45(dev)) - dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE; - I915_WRITE(DSPCLK_GATE_D, dspclk_gate); - - /* WaDisableRenderCachePipelinedFlush */ - I915_WRITE(CACHE_MODE_0, - _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); -} - -static void crestline_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE); - I915_WRITE(RENCLK_GATE_D2, 0); - I915_WRITE(DSPCLK_GATE_D, 0); - I915_WRITE(RAMCLK_GATE_D, 0); - I915_WRITE16(DEUC, 0); -} - -static void broadwater_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE | - I965_RCC_CLOCK_GATE_DISABLE | - I965_RCPB_CLOCK_GATE_DISABLE | - I965_ISC_CLOCK_GATE_DISABLE | - I965_FBC_CLOCK_GATE_DISABLE); - I915_WRITE(RENCLK_GATE_D2, 0); -} - -static void gen3_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 dstate = I915_READ(D_STATE); - - dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | - DSTATE_DOT_CLOCK_GATING; - I915_WRITE(D_STATE, dstate); - - if (IS_PINEVIEW(dev)) - I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); - - /* IIR "flip pending" means done if this bit is set */ - I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE)); -} - -static void i85x_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE); -} - -static void i830_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); -} - -void intel_init_clock_gating(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - dev_priv->display.init_clock_gating(dev); -} - -/* Starting with Haswell, we have different power wells for - * different parts of the GPU. This attempts to enable them all. - */ -void intel_init_power_wells(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long power_wells[] = { - HSW_PWR_WELL_CTL1, - HSW_PWR_WELL_CTL2, - HSW_PWR_WELL_CTL4 - }; - int i; - - if (!IS_HASWELL(dev)) - return; - - DRM_LOCK(dev); - - for (i = 0; i < ARRAY_SIZE(power_wells); i++) { - int well = I915_READ(power_wells[i]); - - if ((well & HSW_PWR_WELL_STATE) == 0) { - I915_WRITE(power_wells[i], well & HSW_PWR_WELL_ENABLE); - if (wait_for((I915_READ(power_wells[i]) & HSW_PWR_WELL_STATE), 20)) - DRM_ERROR("Error enabling power well %lx\n", power_wells[i]); - } - } - - DRM_UNLOCK(dev); -} - -/* Set up chip specific power management-related functions */ -void intel_init_pm(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (I915_HAS_FBC(dev)) { - if (HAS_PCH_SPLIT(dev)) { - dev_priv->display.fbc_enabled = ironlake_fbc_enabled; - dev_priv->display.enable_fbc = ironlake_enable_fbc; - dev_priv->display.disable_fbc = ironlake_disable_fbc; - } else if (IS_GM45(dev)) { - dev_priv->display.fbc_enabled = g4x_fbc_enabled; - dev_priv->display.enable_fbc = g4x_enable_fbc; - dev_priv->display.disable_fbc = g4x_disable_fbc; - } else if (IS_CRESTLINE(dev)) { - dev_priv->display.fbc_enabled = i8xx_fbc_enabled; - dev_priv->display.enable_fbc = i8xx_enable_fbc; - dev_priv->display.disable_fbc = i8xx_disable_fbc; - } - /* 855GM needs testing */ - } - - /* For cxsr */ - if (IS_PINEVIEW(dev)) - i915_pineview_get_mem_freq(dev); - else if (IS_GEN5(dev)) - i915_ironlake_get_mem_freq(dev); - - /* For FIFO watermark updates */ - if (HAS_PCH_SPLIT(dev)) { - if (IS_GEN5(dev)) { - if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK) - dev_priv->display.update_wm = ironlake_update_wm; - else { - DRM_DEBUG_KMS("Failed to get proper latency. " - "Disable CxSR\n"); - dev_priv->display.update_wm = NULL; - } - dev_priv->display.init_clock_gating = ironlake_init_clock_gating; - } else if (IS_GEN6(dev)) { - if (SNB_READ_WM0_LATENCY()) { - dev_priv->display.update_wm = sandybridge_update_wm; - dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; - } else { - DRM_DEBUG_KMS("Failed to read display plane latency. " - "Disable CxSR\n"); - dev_priv->display.update_wm = NULL; - } - dev_priv->display.init_clock_gating = gen6_init_clock_gating; - } else if (IS_IVYBRIDGE(dev)) { - /* FIXME: detect B0+ stepping and use auto training */ - if (SNB_READ_WM0_LATENCY()) { - dev_priv->display.update_wm = ivybridge_update_wm; - dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; - } else { - DRM_DEBUG_KMS("Failed to read display plane latency. " - "Disable CxSR\n"); - dev_priv->display.update_wm = NULL; - } - dev_priv->display.init_clock_gating = ivybridge_init_clock_gating; - } else if (IS_HASWELL(dev)) { - if (SNB_READ_WM0_LATENCY()) { - dev_priv->display.update_wm = sandybridge_update_wm; - dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm; - dev_priv->display.update_linetime_wm = haswell_update_linetime_wm; - } else { - DRM_DEBUG_KMS("Failed to read display plane latency. " - "Disable CxSR\n"); - dev_priv->display.update_wm = NULL; - } - dev_priv->display.init_clock_gating = haswell_init_clock_gating; - } else - dev_priv->display.update_wm = NULL; - } else if (IS_VALLEYVIEW(dev)) { - dev_priv->display.update_wm = valleyview_update_wm; - dev_priv->display.init_clock_gating = - valleyview_init_clock_gating; - } else if (IS_PINEVIEW(dev)) { - if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev), - dev_priv->is_ddr3, - dev_priv->fsb_freq, - dev_priv->mem_freq)) { - DRM_INFO("failed to find known CxSR latency " - "(found ddr%s fsb freq %d, mem freq %d), " - "disabling CxSR\n", - (dev_priv->is_ddr3 == 1) ? "3" : "2", - dev_priv->fsb_freq, dev_priv->mem_freq); - /* Disable CxSR and never update its watermark again */ - pineview_disable_cxsr(dev); - dev_priv->display.update_wm = NULL; - } else - dev_priv->display.update_wm = pineview_update_wm; - dev_priv->display.init_clock_gating = gen3_init_clock_gating; - } else if (IS_G4X(dev)) { - dev_priv->display.update_wm = g4x_update_wm; - dev_priv->display.init_clock_gating = g4x_init_clock_gating; - } else if (IS_GEN4(dev)) { - dev_priv->display.update_wm = i965_update_wm; - if (IS_CRESTLINE(dev)) - dev_priv->display.init_clock_gating = crestline_init_clock_gating; - else if (IS_BROADWATER(dev)) - dev_priv->display.init_clock_gating = broadwater_init_clock_gating; - } else if (IS_GEN3(dev)) { - dev_priv->display.update_wm = i9xx_update_wm; - dev_priv->display.get_fifo_size = i9xx_get_fifo_size; - dev_priv->display.init_clock_gating = gen3_init_clock_gating; - } else if (IS_I865G(dev)) { - dev_priv->display.update_wm = i830_update_wm; - dev_priv->display.init_clock_gating = i85x_init_clock_gating; - dev_priv->display.get_fifo_size = i830_get_fifo_size; - } else if (IS_I85X(dev)) { - dev_priv->display.update_wm = i9xx_update_wm; - dev_priv->display.get_fifo_size = i85x_get_fifo_size; - dev_priv->display.init_clock_gating = i85x_init_clock_gating; - } else { - dev_priv->display.update_wm = i830_update_wm; - dev_priv->display.init_clock_gating = i830_init_clock_gating; - if (IS_845G(dev)) - dev_priv->display.get_fifo_size = i845_get_fifo_size; - else - dev_priv->display.get_fifo_size = i830_get_fifo_size; - } -} - -static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv) -{ - u32 gt_thread_status_mask; - - if (IS_HASWELL(dev_priv->dev)) - gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW; - else - gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK; - - /* w/a for a sporadic read returning 0 by waiting for the GT - * thread to wake up. - */ - if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500)) - DRM_ERROR("GT thread status wait timed out\n"); -} - -static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE, 0); - POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ -} - -static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) -{ - u32 forcewake_ack; - - if (IS_HASWELL(dev_priv->dev)) - forcewake_ack = FORCEWAKE_ACK_HSW; - else - forcewake_ack = FORCEWAKE_ACK; - - if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); - - I915_WRITE_NOTRACE(FORCEWAKE, FORCEWAKE_KERNEL); - POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */ - - if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); - - __gen6_gt_wait_for_thread_c0(dev_priv); -} - -static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff)); - /* something from same cacheline, but !FORCEWAKE_MT */ - POSTING_READ(ECOBUS); -} - -static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv) -{ - u32 forcewake_ack; - - if (IS_HASWELL(dev_priv->dev)) - forcewake_ack = FORCEWAKE_ACK_HSW; - else - forcewake_ack = FORCEWAKE_MT_ACK; - - if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); - - I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); - /* something from same cacheline, but !FORCEWAKE_MT */ - POSTING_READ(ECOBUS); - - if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & 1), - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); - - __gen6_gt_wait_for_thread_c0(dev_priv); -} - -/* - * Generally this is called implicitly by the register read function. However, - * if some sequence requires the GT to not power down then this function should - * be called at the beginning of the sequence followed by a call to - * gen6_gt_force_wake_put() at the end of the sequence. - */ -void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) -{ - - mtx_lock(&dev_priv->gt_lock); - if (dev_priv->forcewake_count++ == 0) - dev_priv->gt.force_wake_get(dev_priv); - mtx_unlock(&dev_priv->gt_lock); -} - -void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv) -{ - u32 gtfifodbg; - gtfifodbg = I915_READ_NOTRACE(GTFIFODBG); - if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK, - "MMIO read or write has been dropped %x\n", gtfifodbg)) - I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK); -} - -static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE, 0); - /* something from same cacheline, but !FORCEWAKE */ - POSTING_READ(ECOBUS); - gen6_gt_check_fifodbg(dev_priv); -} - -static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); - /* something from same cacheline, but !FORCEWAKE_MT */ - POSTING_READ(ECOBUS); - gen6_gt_check_fifodbg(dev_priv); -} - -/* - * see gen6_gt_force_wake_get() - */ -void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) -{ - - mtx_lock(&dev_priv->gt_lock); - if (--dev_priv->forcewake_count == 0) - dev_priv->gt.force_wake_put(dev_priv); - mtx_unlock(&dev_priv->gt_lock); -} - -int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) -{ - int ret = 0; - - if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) { - int loop = 500; - u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); - while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { - udelay(10); - fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); - } - if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES)) - ++ret; - dev_priv->gt_fifo_count = fifo; - } - dev_priv->gt_fifo_count--; - - return ret; -} - -static void vlv_force_wake_reset(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff)); - /* something from same cacheline, but !FORCEWAKE_VLV */ - POSTING_READ(FORCEWAKE_ACK_VLV); -} - -static void vlv_force_wake_get(struct drm_i915_private *dev_priv) -{ - if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1) == 0, - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n"); - - I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL)); - - if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), - FORCEWAKE_ACK_TIMEOUT_MS)) - DRM_ERROR("Timed out waiting for forcewake to ack request.\n"); - - __gen6_gt_wait_for_thread_c0(dev_priv); -} - -static void vlv_force_wake_put(struct drm_i915_private *dev_priv) -{ - I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL)); - /* something from same cacheline, but !FORCEWAKE_VLV */ - POSTING_READ(FORCEWAKE_ACK_VLV); - gen6_gt_check_fifodbg(dev_priv); -} - -void intel_gt_reset(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (IS_VALLEYVIEW(dev)) { - vlv_force_wake_reset(dev_priv); - } else if (INTEL_INFO(dev)->gen >= 6) { - __gen6_gt_force_wake_reset(dev_priv); - if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) - __gen6_gt_force_wake_mt_reset(dev_priv); - } -} - -void intel_gt_init(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - mtx_init(&dev_priv->gt_lock, "i915_gt_lock", NULL, MTX_DEF); - - intel_gt_reset(dev); - - if (IS_VALLEYVIEW(dev)) { - dev_priv->gt.force_wake_get = vlv_force_wake_get; - dev_priv->gt.force_wake_put = vlv_force_wake_put; - } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { - dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; - dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; - } else if (IS_GEN6(dev)) { - dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; - dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; - } - TIMEOUT_TASK_INIT(dev_priv->wq, &dev_priv->rps.delayed_resume_work, 0, - intel_gen6_powersave_work, dev_priv); -} - -int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val) -{ - sx_assert(&dev_priv->rps.hw_lock, SA_XLOCKED); - - if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { - DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n"); - return -EAGAIN; - } - - I915_WRITE(GEN6_PCODE_DATA, *val); - I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); - - if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, - 500)) { - DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox); - return -ETIMEDOUT; - } - - *val = I915_READ(GEN6_PCODE_DATA); - I915_WRITE(GEN6_PCODE_DATA, 0); - - return 0; -} - -int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val) -{ - sx_assert(&dev_priv->rps.hw_lock, SA_XLOCKED); - - if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { - DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n"); - return -EAGAIN; - } - - I915_WRITE(GEN6_PCODE_DATA, val); - I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); - - if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, - 500)) { - DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox); - return -ETIMEDOUT; - } - - I915_WRITE(GEN6_PCODE_DATA, 0); - - return 0; -} |