| /* |
| * 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 <linux/cpufreq.h> |
| #include "i915_drv.h" |
| #include "intel_drv.h" |
| #include "../../../platform/x86/intel_ips.h" |
| #include <linux/module.h> |
| |
| /* 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 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(struct work_struct *__work) |
| { |
| struct intel_fbc_work *work = |
| container_of(to_delayed_work(__work), |
| struct intel_fbc_work, work); |
| struct drm_device *dev = work->crtc->dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| mutex_lock(&dev->struct_mutex); |
| 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; |
| } |
| mutex_unlock(&dev->struct_mutex); |
| |
| kfree(work); |
| } |
| |
| 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 (cancel_delayed_work(&dev_priv->fbc_work->work)) |
| /* tasklet was killed before being run, clean up */ |
| kfree(dev_priv->fbc_work); |
| |
| /* 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 = kzalloc(sizeof *work, GFP_KERNEL); |
| if (work == NULL) { |
| dev_priv->display.enable_fbc(crtc, interval); |
| return; |
| } |
| |
| work->crtc = crtc; |
| work->fb = crtc->fb; |
| work->interval = interval; |
| INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); |
| |
| 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. |
| */ |
| schedule_delayed_work(&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 (tmp_crtc->enabled && |
| !to_intel_crtc(tmp_crtc)->primary_disabled && |
| tmp_crtc->fb) { |
| 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 (in_dbg_master()) |
| 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->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->c_m = 0; |
| } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) { |
| dev_priv->c_m = 1; |
| } else { |
| dev_priv->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 (crtc->enabled && crtc->fb) { |
| 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 (crtc->fb == NULL || !crtc->enabled) { |
| *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 (crtc->fb == NULL || !crtc->enabled) |
| 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) is_power_of_2(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; |
| 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; |
| |
| plane_sr = cursor_sr = 0; |
| if (single_plane_enabled(enabled) && |
| g4x_compute_srwm(dev, ffs(enabled) - 1, |
| sr_latency_ns, |
| &valleyview_wm_info, |
| &valleyview_cursor_wm_info, |
| &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); |
| |
| 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) | (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; |
| |
| plane_sr = cursor_sr = 0; |
| 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); |
| |
| 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) | |
| (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 (crtc->enabled && crtc->fb) { |
| planea_wm = intel_calculate_wm(crtc->mode.clock, |
| wm_info, fifo_size, |
| crtc->fb->bits_per_pixel / 8, |
| 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 (crtc->enabled && crtc->fb) { |
| planeb_wm = intel_calculate_wm(crtc->mode.clock, |
| wm_info, fifo_size, |
| crtc->fb->bits_per_pixel / 8, |
| 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), |
| crtc->fb->bits_per_pixel / 8, |
| 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; |
| } |
| |
| if ((dev_priv->num_pipe == 3) && |
| 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 */ |
| 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 |
| 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 (crtc->fb == NULL || !crtc->enabled) { |
| *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; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| 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); |
| mutex_unlock(&dev->struct_mutex); |
| return NULL; |
| } |
| |
| /** |
| * Lock protecting IPS related data structures |
| * - i915_mch_dev |
| * - dev_priv->max_delay |
| * - dev_priv->min_delay |
| * - dev_priv->fmax |
| * - dev_priv->gpu_busy |
| * - dev_priv->gfx_power |
| */ |
| DEFINE_SPINLOCK(mchdev_lock); |
| |
| /* 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; |
| |
| assert_spin_locked(&mchdev_lock); |
| |
| 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; |
| |
| spin_lock_irq(&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->fmax = fmax; /* IPS callback will increase this */ |
| dev_priv->fstart = fstart; |
| |
| dev_priv->max_delay = fstart; |
| dev_priv->min_delay = fmin; |
| dev_priv->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->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) + |
| I915_READ(0x112e0); |
| dev_priv->last_time1 = jiffies_to_msecs(jiffies); |
| dev_priv->last_count2 = I915_READ(0x112f4); |
| getrawmonotonic(&dev_priv->last_time2); |
| |
| spin_unlock_irq(&mchdev_lock); |
| } |
| |
| static void ironlake_disable_drps(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u16 rgvswctl; |
| |
| spin_lock_irq(&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->fstart); |
| mdelay(1); |
| rgvswctl |= MEMCTL_CMD_STS; |
| I915_WRITE(MEMSWCTL, rgvswctl); |
| mdelay(1); |
| |
| spin_unlock_irq(&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); |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| 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); |
| |
| 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. */ |
| |
| spin_lock_irq(&dev_priv->rps.lock); |
| dev_priv->rps.pm_iir = 0; |
| spin_unlock_irq(&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; |
| |
| if (INTEL_INFO(dev)->gen == 5) { |
| #ifdef CONFIG_INTEL_IOMMU |
| /* Disable rc6 on ilk if VT-d is on. */ |
| if (intel_iommu_gfx_mapped) |
| return false; |
| #endif |
| DRM_DEBUG_DRIVER("Ironlake: only RC6 available\n"); |
| return INTEL_RC6_ENABLE; |
| } |
| |
| 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 pcu_mbox, rc6_mask = 0; |
| u32 gtfifodbg; |
| int rc6_mode; |
| int i; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| /* 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, 100000); |
| 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); |
| |
| if (IS_HASWELL(dev)) { |
| 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); |
| } else { |
| I915_WRITE(GEN6_RP_UP_THRESHOLD, 10000); |
| I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 1000000); |
| I915_WRITE(GEN6_RP_UP_EI, 100000); |
| I915_WRITE(GEN6_RP_DOWN_EI, 5000000); |
| } |
| |
| 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)); |
| |
| if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, |
| 500)) |
| DRM_ERROR("timeout waiting for pcode mailbox to become idle\n"); |
| |
| I915_WRITE(GEN6_PCODE_DATA, 0); |
| I915_WRITE(GEN6_PCODE_MAILBOX, |
| GEN6_PCODE_READY | |
| GEN6_PCODE_WRITE_MIN_FREQ_TABLE); |
| if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, |
| 500)) |
| DRM_ERROR("timeout waiting for pcode mailbox to finish\n"); |
| |
| /* Check for overclock support */ |
| if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, |
| 500)) |
| DRM_ERROR("timeout waiting for pcode mailbox to become idle\n"); |
| I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_READ_OC_PARAMS); |
| pcu_mbox = I915_READ(GEN6_PCODE_DATA); |
| if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, |
| 500)) |
| DRM_ERROR("timeout waiting for pcode mailbox to finish\n"); |
| if (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); |
| } |
| |
| gen6_set_rps(dev_priv->dev, (gt_perf_status & 0xff00) >> 8); |
| |
| /* requires MSI enabled */ |
| I915_WRITE(GEN6_PMIER, GEN6_PM_DEFERRED_EVENTS); |
| spin_lock_irq(&dev_priv->rps.lock); |
| WARN_ON(dev_priv->rps.pm_iir != 0); |
| I915_WRITE(GEN6_PMIMR, 0); |
| spin_unlock_irq(&dev_priv->rps.lock); |
| /* enable all PM interrupts */ |
| I915_WRITE(GEN6_PMINTRMSK, 0); |
| |
| 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, ia_freq, max_ia_freq; |
| int scaling_factor = 180; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| 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; |
| |
| /* 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); |
| |
| I915_WRITE(GEN6_PCODE_DATA, |
| (ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT) | |
| gpu_freq); |
| I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | |
| GEN6_PCODE_WRITE_MIN_FREQ_TABLE); |
| if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & |
| GEN6_PCODE_READY) == 0, 10)) { |
| DRM_ERROR("pcode write of freq table timed out\n"); |
| continue; |
| } |
| } |
| } |
| |
| void ironlake_teardown_rc6(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (dev_priv->renderctx) { |
| i915_gem_object_unpin(dev_priv->renderctx); |
| drm_gem_object_unreference(&dev_priv->renderctx->base); |
| dev_priv->renderctx = NULL; |
| } |
| |
| if (dev_priv->pwrctx) { |
| i915_gem_object_unpin(dev_priv->pwrctx); |
| drm_gem_object_unreference(&dev_priv->pwrctx->base); |
| dev_priv->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->renderctx == NULL) |
| dev_priv->renderctx = intel_alloc_context_page(dev); |
| if (!dev_priv->renderctx) |
| return -ENOMEM; |
| |
| if (dev_priv->pwrctx == NULL) |
| dev_priv->pwrctx = intel_alloc_context_page(dev); |
| if (!dev_priv->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]; |
| int ret; |
| |
| /* rc6 disabled by default due to repeated reports of hanging during |
| * boot and resume. |
| */ |
| if (!intel_enable_rc6(dev)) |
| return; |
| |
| WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
| |
| ret = ironlake_setup_rc6(dev); |
| if (ret) |
| return; |
| |
| /* |
| * 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); |
| 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->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_wait_ring_idle(ring); |
| if (ret) { |
| DRM_ERROR("failed to enable ironlake power power savings\n"); |
| ironlake_teardown_rc6(dev); |
| return; |
| } |
| |
| I915_WRITE(PWRCTXA, dev_priv->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 }, |
| }; |
| |
| 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; |
| |
| assert_spin_locked(&mchdev_lock); |
| |
| diff1 = now - dev_priv->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->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->last_count1) { |
| diff = ~0UL - dev_priv->last_count1; |
| diff += total_count; |
| } else { |
| diff = total_count - dev_priv->last_count1; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(cparams); i++) { |
| if (cparams[i].i == dev_priv->c_m && |
| cparams[i].t == dev_priv->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->last_count1 = total_count; |
| dev_priv->last_time1 = now; |
| |
| dev_priv->chipset_power = ret; |
| |
| return ret; |
| } |
| |
| 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(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; |
| |
| assert_spin_locked(&mchdev_lock); |
| |
| getrawmonotonic(&now); |
| diff1 = timespec_sub(now, dev_priv->last_time2); |
| |
| /* 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->last_count2) { |
| diff = ~0UL - dev_priv->last_count2; |
| diff += count; |
| } else { |
| diff = count - dev_priv->last_count2; |
| } |
| |
| dev_priv->last_count2 = count; |
| dev_priv->last_time2 = now; |
| |
| /* More magic constants... */ |
| diff = diff * 1181; |
| diff = div_u64(diff, diffms * 10); |
| dev_priv->gfx_power = diff; |
| } |
| |
| void i915_update_gfx_val(struct drm_i915_private *dev_priv) |
| { |
| if (dev_priv->info->gen != 5) |
| return; |
| |
| spin_lock_irq(&mchdev_lock); |
| |
| __i915_update_gfx_val(dev_priv); |
| |
| spin_unlock_irq(&mchdev_lock); |
| } |
| |
| unsigned long i915_gfx_val(struct drm_i915_private *dev_priv) |
| { |
| unsigned long t, corr, state1, corr2, state2; |
| u32 pxvid, ext_v; |
| |
| assert_spin_locked(&mchdev_lock); |
| |
| 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->corr); |
| |
| state2 = (corr2 * state1) / 10000; |
| state2 /= 100; /* convert to mW */ |
| |
| __i915_update_gfx_val(dev_priv); |
| |
| return dev_priv->gfx_power + state2; |
| } |
| |
| /** |
| * 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; |
| |
| spin_lock_irq(&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: |
| spin_unlock_irq(&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; |
| |
| spin_lock_irq(&mchdev_lock); |
| if (!i915_mch_dev) { |
| ret = false; |
| goto out_unlock; |
| } |
| dev_priv = i915_mch_dev; |
| |
| if (dev_priv->max_delay > dev_priv->fmax) |
| dev_priv->max_delay--; |
| |
| out_unlock: |
| spin_unlock_irq(&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; |
| |
| spin_lock_irq(&mchdev_lock); |
| if (!i915_mch_dev) { |
| ret = false; |
| goto out_unlock; |
| } |
| dev_priv = i915_mch_dev; |
| |
| if (dev_priv->max_delay < dev_priv->min_delay) |
| dev_priv->max_delay++; |
| |
| out_unlock: |
| spin_unlock_irq(&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; |
| |
| spin_lock_irq(&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: |
| spin_unlock_irq(&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; |
| |
| spin_lock_irq(&mchdev_lock); |
| if (!i915_mch_dev) { |
| ret = false; |
| goto out_unlock; |
| } |
| dev_priv = i915_mch_dev; |
| |
| dev_priv->max_delay = dev_priv->fstart; |
| |
| if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart)) |
| ret = false; |
| |
| out_unlock: |
| spin_unlock_irq(&mchdev_lock); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); |
| |
| /** |
| * 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); |
| } |
| } |
| |
| 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. */ |
| spin_lock_irq(&mchdev_lock); |
| i915_mch_dev = dev_priv; |
| spin_unlock_irq(&mchdev_lock); |
| |
| ips_ping_for_i915_load(); |
| } |
| |
| void intel_gpu_ips_teardown(void) |
| { |
| spin_lock_irq(&mchdev_lock); |
| i915_mch_dev = NULL; |
| spin_unlock_irq(&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->corr = (lcfuse & LCFUSE_HIV_MASK); |
| } |
| |
| void intel_disable_gt_powersave(struct drm_device *dev) |
| { |
| if (IS_IRONLAKE_M(dev)) { |
| ironlake_disable_drps(dev); |
| ironlake_disable_rc6(dev); |
| } else if (INTEL_INFO(dev)->gen >= 6 && !IS_VALLEYVIEW(dev)) { |
| gen6_disable_rps(dev); |
| } |
| } |
| |
| void intel_enable_gt_powersave(struct drm_device *dev) |
| { |
| 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)) { |
| gen6_enable_rps(dev); |
| gen6_update_ring_freq(dev); |
| } |
| } |
| |
| static void ironlake_init_clock_gating(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE; |
| |
| /* Required for FBC */ |
| dspclk_gate |= DPFCUNIT_CLOCK_GATE_DISABLE | |
| DPFCRUNIT_CLOCK_GATE_DISABLE | |
| DPFDUNIT_CLOCK_GATE_DISABLE; |
| /* Required for CxSR */ |
| dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE; |
| |
| I915_WRITE(PCH_3DCGDIS0, |
| MARIUNIT_CLOCK_GATE_DISABLE | |
| SVSMUNIT_CLOCK_GATE_DISABLE); |
| I915_WRITE(PCH_3DCGDIS1, |
| VFMUNIT_CLOCK_GATE_DISABLE); |
| |
| I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); |
| |
| /* |
| * 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)); |
| I915_WRITE(ILK_DSPCLK_GATE, |
| (I915_READ(ILK_DSPCLK_GATE) | |
| ILK_DPARB_CLK_GATE)); |
| 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, |
| I915_READ(ILK_DSPCLK_GATE) | |
| ILK_DPFC_DIS1 | |
| ILK_DPFC_DIS2 | |
| ILK_CLK_FBC); |
| } |
| |
| 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); |
| } |
| |
| 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 = VRHUNIT_CLOCK_GATE_DISABLE; |
| |
| I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); |
| |
| I915_WRITE(ILK_DISPLAY_CHICKEN2, |
| I915_READ(ILK_DISPLAY_CHICKEN2) | |
| ILK_ELPIN_409_SELECT); |
| |
| 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_CHICKEN, (0xFFFF << 16) | |
| _3D_CHICKEN_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, |
| I915_READ(ILK_DSPCLK_GATE) | |
| ILK_DPARB_CLK_GATE | |
| ILK_DPFD_CLK_GATE); |
| |
| I915_WRITE(GEN6_MBCTL, I915_READ(GEN6_MBCTL) | |
| GEN6_MBCTL_ENABLE_BOOT_FETCH); |
| |
| for_each_pipe(pipe) { |
| I915_WRITE(DSPCNTR(pipe), |
| I915_READ(DSPCNTR(pipe)) | |
| DISPPLANE_TRICKLE_FEED_DISABLE); |
| intel_flush_display_plane(dev_priv, pipe); |
| } |
| } |
| |
| 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 haswell_init_clock_gating(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| int pipe; |
| uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE; |
| |
| I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); |
| |
| 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); |
| |
| I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); |
| |
| I915_WRITE(IVB_CHICKEN3, |
| CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | |
| CHICKEN3_DGMG_DONE_FIX_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)); |
| |
| /* 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); |
| |
| } |
| |
| static void ivybridge_init_clock_gating(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| int pipe; |
| uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE; |
| uint32_t snpcr; |
| |
| I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); |
| |
| I915_WRITE(WM3_LP_ILK, 0); |
| I915_WRITE(WM2_LP_ILK, 0); |
| I915_WRITE(WM1_LP_ILK, 0); |
| |
| I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); |
| |
| I915_WRITE(IVB_CHICKEN3, |
| CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | |
| CHICKEN3_DGMG_DONE_FIX_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); |
| |
| /* 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); |
| } |
| |
| 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); |
| } |
| |
| static void valleyview_init_clock_gating(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| int pipe; |
| uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE; |
| |
| I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); |
| |
| I915_WRITE(WM3_LP_ILK, 0); |
| I915_WRITE(WM2_LP_ILK, 0); |
| I915_WRITE(WM1_LP_ILK, 0); |
| |
| I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); |
| |
| I915_WRITE(IVB_CHICKEN3, |
| CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | |
| CHICKEN3_DGMG_DONE_FIX_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); |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| 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)); |
| } |
| |
| 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); |
| } |
| |
| 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 cpt_init_clock_gating(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| int pipe; |
| |
| /* |
| * 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); |
| /* Without this, mode sets may fail silently on FDI */ |
| for_each_pipe(pipe) |
| I915_WRITE(TRANS_CHICKEN2(pipe), TRANS_AUTOTRAIN_GEN_STALL_DIS); |
| } |
| |
| 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); |
| |
| if (dev_priv->display.init_pch_clock_gating) |
| dev_priv->display.init_pch_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; |
| |
| mutex_lock(&dev->struct_mutex); |
| |
| 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]); |
| } |
| } |
| |
| mutex_unlock(&dev->struct_mutex); |
| } |
| |
| /* 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 (HAS_PCH_IBX(dev)) |
| dev_priv->display.init_pch_clock_gating = ibx_init_clock_gating; |
| else if (HAS_PCH_CPT(dev)) |
| dev_priv->display.init_pch_clock_gating = cpt_init_clock_gating; |
| |
| 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 = 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 = 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_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_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, 500)) |
| DRM_ERROR("Force wake wait timed out\n"); |
| |
| I915_WRITE_NOTRACE(FORCEWAKE, 1); |
| POSTING_READ(FORCEWAKE); |
| |
| if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1), 500)) |
| DRM_ERROR("Force wake wait timed out\n"); |
| |
| __gen6_gt_wait_for_thread_c0(dev_priv); |
| } |
| |
| 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_us((I915_READ_NOTRACE(forcewake_ack) & 1) == 0, 500)) |
| DRM_ERROR("Force wake wait timed out\n"); |
| |
| I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(1)); |
| POSTING_READ(FORCEWAKE_MT); |
| |
| if (wait_for_atomic_us((I915_READ_NOTRACE(forcewake_ack) & 1), 500)) |
| DRM_ERROR("Force wake wait timed out\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) |
| { |
| unsigned long irqflags; |
| |
| spin_lock_irqsave(&dev_priv->gt_lock, irqflags); |
| if (dev_priv->forcewake_count++ == 0) |
| dev_priv->gt.force_wake_get(dev_priv); |
| spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); |
| } |
| |
| 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); |
| POSTING_READ(FORCEWAKE); |
| 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(1)); |
| POSTING_READ(FORCEWAKE_MT); |
| gen6_gt_check_fifodbg(dev_priv); |
| } |
| |
| /* |
| * see gen6_gt_force_wake_get() |
| */ |
| void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) |
| { |
| unsigned long irqflags; |
| |
| spin_lock_irqsave(&dev_priv->gt_lock, irqflags); |
| if (--dev_priv->forcewake_count == 0) |
| dev_priv->gt.force_wake_put(dev_priv); |
| spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); |
| } |
| |
| 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_get(struct drm_i915_private *dev_priv) |
| { |
| /* Already awake? */ |
| if ((I915_READ(0x130094) & 0xa1) == 0xa1) |
| return; |
| |
| I915_WRITE_NOTRACE(FORCEWAKE_VLV, 0xffffffff); |
| POSTING_READ(FORCEWAKE_VLV); |
| |
| if (wait_for_atomic_us((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & 1), 500)) |
| DRM_ERROR("Force wake wait timed out\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, 0xffff0000); |
| /* FIXME: confirm VLV behavior with Punit folks */ |
| POSTING_READ(FORCEWAKE_VLV); |
| } |
| |
| void intel_gt_init(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| spin_lock_init(&dev_priv->gt_lock); |
| |
| 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 (INTEL_INFO(dev)->gen >= 6) { |
| dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; |
| dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; |
| |
| /* IVB configs may use multi-threaded forcewake */ |
| if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { |
| u32 ecobus; |
| |
| /* A small trick here - if the bios hasn't configured |
| * MT forcewake, and if the device is in RC6, then |
| * force_wake_mt_get will not wake the device and the |
| * ECOBUS read will return zero. Which will be |
| * (correctly) interpreted by the test below as MT |
| * forcewake being disabled. |
| */ |
| mutex_lock(&dev->struct_mutex); |
| __gen6_gt_force_wake_mt_get(dev_priv); |
| ecobus = I915_READ_NOTRACE(ECOBUS); |
| __gen6_gt_force_wake_mt_put(dev_priv); |
| mutex_unlock(&dev->struct_mutex); |
| |
| if (ecobus & FORCEWAKE_MT_ENABLE) { |
| DRM_DEBUG_KMS("Using MT version of forcewake\n"); |
| dev_priv->gt.force_wake_get = |
| __gen6_gt_force_wake_mt_get; |
| dev_priv->gt.force_wake_put = |
| __gen6_gt_force_wake_mt_put; |
| } |
| } |
| } |
| } |
| |