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| author | Keith Packard <keithp@keithp.com> | 2011-07-28 14:47:14 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-07-28 16:28:35 -0700 |
| commit | d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e (patch) | |
| tree | fca86658c69f3a778e1eb39ca58b983c5b36140e /drivers/gpu | |
| parent | 2704cf5fbd248871a745d210733c6319959d2b0c (diff) | |
| download | talos-op-linux-d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e.tar.gz talos-op-linux-d74362c9e45689d8d7e3d4bcf6681c4358ef4f2e.zip | |
drm/i915: Flush other plane register writes
Writes to the plane control register are buffered in the chip until a
write to the DSPADDR (pre-965) or DSPSURF (post-965) register occurs.
This patch adds flushes in:
intel_enable_plane
gen6_init_clock_gating
ivybridge_init_clock_gating
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a7a7b672c4c2..8f7ed7304269 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1290,6 +1290,17 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv, intel_wait_for_pipe_off(dev_priv->dev, pipe); } +/* + * Plane regs are double buffered, going from enabled->disabled needs a + * trigger in order to latch. The display address reg provides this. + */ +static void intel_flush_display_plane(struct drm_i915_private *dev_priv, + enum plane plane) +{ + I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane))); + I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane))); +} + /** * intel_enable_plane - enable a display plane on a given pipe * @dev_priv: i915 private structure @@ -1313,20 +1324,10 @@ static void intel_enable_plane(struct drm_i915_private *dev_priv, return; I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE); + intel_flush_display_plane(dev_priv, plane); intel_wait_for_vblank(dev_priv->dev, pipe); } -/* - * Plane regs are double buffered, going from enabled->disabled needs a - * trigger in order to latch. The display address reg provides this. - */ -static void intel_flush_display_plane(struct drm_i915_private *dev_priv, - enum plane plane) -{ - I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane))); - I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane))); -} - /** * intel_disable_plane - disable a display plane * @dev_priv: i915 private structure @@ -7418,10 +7419,12 @@ static void gen6_init_clock_gating(struct drm_device *dev) ILK_DPARB_CLK_GATE | ILK_DPFD_CLK_GATE); - for_each_pipe(pipe) + 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 ivybridge_init_clock_gating(struct drm_device *dev) @@ -7438,10 +7441,12 @@ static void ivybridge_init_clock_gating(struct drm_device *dev) I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); - for_each_pipe(pipe) + 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 g4x_init_clock_gating(struct drm_device *dev) |
