diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 118 |
2 files changed, 64 insertions, 60 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 3154b3dfd804..00dc59a51ccd 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -331,10 +331,8 @@ typedef struct drm_i915_private { uint32_t last_instdone1; unsigned long cfb_size; - unsigned long cfb_pitch; - unsigned long cfb_offset; - int cfb_fence; - int cfb_plane; + unsigned int cfb_fb; + enum plane cfb_plane; int cfb_y; struct intel_fbc_work *fbc_work; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index df2839c59b74..b5b15bda71d9 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1414,27 +1414,17 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) 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; - if (fb->pitch == dev_priv->cfb_pitch && - obj->fence_reg == dev_priv->cfb_fence && - intel_crtc->plane == dev_priv->cfb_plane && - I915_READ(FBC_CONTROL) & FBC_CTL_EN) - return; - - i8xx_disable_fbc(dev); - - dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; - - if (fb->pitch < dev_priv->cfb_pitch) - dev_priv->cfb_pitch = fb->pitch; + cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; + if (fb->pitch < cfb_pitch) + cfb_pitch = fb->pitch; /* FBC_CTL wants 64B units */ - dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1; - dev_priv->cfb_fence = obj->fence_reg; - dev_priv->cfb_plane = intel_crtc->plane; - plane = dev_priv->cfb_plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; + 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++) @@ -1450,13 +1440,13 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) 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 |= (dev_priv->cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; + fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT; - fbc_ctl |= dev_priv->cfb_fence; + fbc_ctl |= obj->fence_reg; I915_WRITE(FBC_CONTROL, fbc_ctl); - DRM_DEBUG_KMS("enabled FBC, pitch %ld, yoff %d, plane %d, ", - dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane); + 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) @@ -1478,23 +1468,8 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) unsigned long stall_watermark = 200; u32 dpfc_ctl; - dpfc_ctl = I915_READ(DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - if (dev_priv->cfb_fence == obj->fence_reg && - dev_priv->cfb_plane == intel_crtc->plane && - dev_priv->cfb_y == crtc->y) - return; - - I915_WRITE(DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); - intel_wait_for_vblank(dev, intel_crtc->pipe); - } - - dev_priv->cfb_fence = obj->fence_reg; - dev_priv->cfb_plane = intel_crtc->plane; - dev_priv->cfb_y = crtc->y; - dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; - dpfc_ctl |= DPFC_CTL_FENCE_EN | dev_priv->cfb_fence; + 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 | @@ -1563,27 +1538,11 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) u32 dpfc_ctl; dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - if (dev_priv->cfb_fence == obj->fence_reg && - dev_priv->cfb_plane == intel_crtc->plane && - dev_priv->cfb_offset == obj->gtt_offset && - dev_priv->cfb_y == crtc->y) - return; - - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); - intel_wait_for_vblank(dev, intel_crtc->pipe); - } - - dev_priv->cfb_fence = obj->fence_reg; - dev_priv->cfb_plane = intel_crtc->plane; - dev_priv->cfb_offset = obj->gtt_offset; - dev_priv->cfb_y = crtc->y; - 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 | dev_priv->cfb_fence); + 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 | @@ -1596,7 +1555,7 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) if (IS_GEN6(dev)) { I915_WRITE(SNB_DPFC_CTL_SA, - SNB_CPU_FENCE_ENABLE | dev_priv->cfb_fence); + SNB_CPU_FENCE_ENABLE | obj->fence_reg); I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); sandybridge_blit_fbc_update(dev); } @@ -1649,10 +1608,15 @@ static void intel_fbc_work_fn(struct work_struct *__work) /* Double check that we haven't switched fb without cancelling * the prior work. */ - if (work->crtc->fb == work->fb) + 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); @@ -1710,7 +1674,10 @@ static void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval) 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. + * 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 @@ -1730,6 +1697,7 @@ void intel_disable_fbc(struct drm_device *dev) return; dev_priv->display.disable_fbc(dev); + dev_priv->cfb_plane = -1; } /** @@ -1843,6 +1811,44 @@ static void intel_update_fbc(struct drm_device *dev) 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; |