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drm/i915: Enforce going back to none before changing CRC source

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This way we can have some init/fini code on those transitions.

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 18:55:32 +01:00 committed by Daniel Vetter
parent cc3da175b0
commit ae676fcd2a
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/i915_debugfs.c
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@ -1816,6 +1816,10 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
if (pipe_crc->source == source)
return 0;
/* forbid changing the source without going back to 'none' */
if (pipe_crc->source && source)
return -EINVAL;
pipe_crc->source = source;
switch (source) {