drm/i915: Use generic vblank wait

This has the upside that it will no longer steal interrupts from the
interrupt handler on pre-g4x. Furthermore this will now scream properly
on all platforms if we don't have hw counters enabled.

v2: Adjust to the new names.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 007f465..474e615 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -892,18 +892,6 @@ enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
        return intel_crtc->config.cpu_transcoder;
 }
 
-static void g4x_wait_for_vblank(struct drm_device *dev, int pipe)
-{
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       u32 frame, frame_reg = PIPE_FRMCOUNT_GM45(pipe);
-
-       frame = I915_READ(frame_reg);
-
-       if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50))
-               WARN(1, "vblank wait on pipe %c timed out\n",
-                    pipe_name(pipe));
-}
-
 /**
  * intel_wait_for_vblank - wait for vblank on a given pipe
  * @dev: drm device
@@ -914,36 +902,7 @@ static void g4x_wait_for_vblank(struct drm_device *dev, int pipe)
  */
 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 (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
-               g4x_wait_for_vblank(dev, pipe);
-               return;
-       }
-
-       /* Clear existing vblank status. Note this will clear any other
-        * sticky status fields as well.
-        *
-        * This races with i915_driver_irq_handler() with the result
-        * that either function could miss a vblank event.  Here it is not
-        * fatal, as we will either wait upon the next vblank interrupt or
-        * timeout.  Generally speaking intel_wait_for_vblank() is only
-        * called during modeset at which time the GPU should be idle and
-        * should *not* be performing page flips and thus not waiting on
-        * vblanks...
-        * Currently, the result of us stealing a vblank from the irq
-        * handler is that a single frame will be skipped during swapbuffers.
-        */
-       I915_WRITE(pipestat_reg,
-                  I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
-
-       /* Wait for vblank interrupt bit to set */
-       if (wait_for(I915_READ(pipestat_reg) &
-                    PIPE_VBLANK_INTERRUPT_STATUS,
-                    50))
-               DRM_DEBUG_KMS("vblank wait on pipe %c timed out\n",
-                             pipe_name(pipe));
+       drm_wait_one_vblank(dev, pipe);
 }
 
 static bool pipe_dsl_stopped(struct drm_device *dev, enum pipe pipe)