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drm/i915: Make switching to the same CRC source a no-op

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Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-10-15 18:55:31 +01:00 • committed by Daniel Vetter
commit cc3da175b0
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/i915/i915_debugfs.c
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@ -1804,6 +1804,7 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
enum intel_pipe_crc_source source)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
u32 val;
@ -1812,7 +1813,10 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
if (!IS_IVYBRIDGE(dev))
return -ENODEV;
dev_priv->pipe_crc[pipe].source = source;
if (pipe_crc->source == source)
return 0;
pipe_crc->source = source;
switch (source) {
case INTEL_PIPE_CRC_SOURCE_PLANE1: