From: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
[Why]
During any modeset the CRTC stream is removed and a new stream is added.
This new stream doesn't carry over CRC capture state if it was
previously set.
[How]
Re-program the stream for CRC capture. The existing DRM callback can
be re-used here for the most part - the only modification needed is
additional locking now that it's called from within commit tail.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Reviewed-by: Harry Wentland <Harry.Wentland@xxxxxxx>
Reviewed-by: Sun peng Li <Sunpeng.Li@xxxxxxx>
Acked-by: Leo Li <sunpeng.li@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++++---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c | 8 +++++++-
2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 68355ed..95ec8d8 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5026,10 +5026,13 @@ static int amdgpu_dm_atomic_commit(struct drm_device *dev,
if (drm_atomic_crtc_needs_modeset(new_crtc_state)
&& dm_old_crtc_state->stream) {
/*
- * CRC capture was enabled but not disabled.
- * Release the vblank reference.
+ * If the stream is removed and CRC capture was
+ * enabled on the CRTC the extra vblank reference
+ * needs to be dropped since CRC capture will be
+ * disabled.
*/
- if (dm_new_crtc_state->crc_enabled) {
+ if (!dm_new_crtc_state->stream
+ && dm_new_crtc_state->crc_enabled) {
drm_crtc_vblank_put(crtc);
dm_new_crtc_state->crc_enabled = false;
}
@@ -5267,6 +5270,10 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
continue;
manage_dm_interrupts(adev, acrtc, true);
+
+ /* The stream has changed so CRC capture needs to re-enabled. */
+ if (dm_new_crtc_state->crc_enabled)
+ amdgpu_dm_crtc_set_crc_source(crtc, "auto");
}
/* update planes when needed per crtc*/
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
index 26b6511..a10e3a5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c
@@ -64,6 +64,7 @@ amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
{
+ struct amdgpu_device *adev = crtc->dev->dev_private;
struct dm_crtc_state *crtc_state = to_dm_crtc_state(crtc->state);
struct dc_stream_state *stream_state = crtc_state->stream;
bool enable;
@@ -83,15 +84,20 @@ int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name)
enable = (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO);
+ mutex_lock(&adev->dm.dc_lock);
if (!dc_stream_configure_crc(stream_state->ctx->dc, stream_state,
- enable, enable))
+ enable, enable)) {
+ mutex_unlock(&adev->dm.dc_lock);
return -EINVAL;
+ }
/* When enabling CRC, we should also disable dithering. */
dc_stream_set_dither_option(stream_state,
enable ? DITHER_OPTION_TRUN8
: DITHER_OPTION_DEFAULT);
+ mutex_unlock(&adev->dm.dc_lock);
+
/*
* Reading the CRC requires the vblank interrupt handler to be
* enabled. Keep a reference until CRC capture stops.
--
2.7.4
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