From: Paulo Zanoni Date: Fri, 4 May 2012 20:18:15 +0000 (-0300) Subject: drm/i915: implement ironlake_wait_for_vblank X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a928d536c09eb071d114aa94bc60d002e7c8f92b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: implement ironlake_wait_for_vblank intel_wait_for_vblank uses PIPESTAT, which does not exist on Ironlake and newer, so now we use PIPEFRAME. Signed-off-by: Paulo Zanoni [danvet: Ditch the check for disable pipe from the new ilk wait for vblank function to keep it consisten with existing behaviour.] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ae3f4454928e..b322bde98675 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -784,6 +784,17 @@ intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc, return true; } +static void ironlake_wait_for_vblank(struct drm_device *dev, int pipe) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 frame, frame_reg = PIPEFRAME(pipe); + + frame = I915_READ(frame_reg); + + if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50)) + DRM_DEBUG_KMS("vblank wait timed out\n"); +} + /** * intel_wait_for_vblank - wait for vblank on a given pipe * @dev: drm device @@ -797,6 +808,11 @@ void intel_wait_for_vblank(struct drm_device *dev, int pipe) struct drm_i915_private *dev_priv = dev->dev_private; int pipestat_reg = PIPESTAT(pipe); + if (INTEL_INFO(dev)->gen >= 5) { + ironlake_wait_for_vblank(dev, pipe); + return; + } + /* Clear existing vblank status. Note this will clear any other * sticky status fields as well. *