Commit 4b584369 authored by Damien Lespiau's avatar Damien Lespiau Committed by Daniel Vetter

drm/i915: Empty the circular buffer when asked for a new source

So we don't read out stale CRCs from a previous run left in the buffer.
Signed-off-by: default avatarDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent ae676fcd
...@@ -1820,6 +1820,12 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe, ...@@ -1820,6 +1820,12 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
if (pipe_crc->source && source) if (pipe_crc->source && source)
return -EINVAL; return -EINVAL;
/* none -> real source transition */
if (source) {
atomic_set(&pipe_crc->head, 0);
atomic_set(&pipe_crc->tail, 0);
}
pipe_crc->source = source; pipe_crc->source = source;
switch (source) { switch (source) {
......
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