This way we can have some init/fini code on those transitions.
Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 8c750d5..787c50d 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -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) {
--
1.8.3.1
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