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| author | Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> | 2016-12-07 14:10:05 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 17:04:38 -0400 |
| commit | 922aa1e15e03ee2b32f50cd8a9d2c8376a19d22c (patch) | |
| tree | 3a6bda92474a208ec6e2839c6526e65f72225485 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | f4c07f88cc30e77d2431b5bcf95a05e0ee6f3482 (diff) | |
| download | lwn-922aa1e15e03ee2b32f50cd8a9d2c8376a19d22c.tar.gz lwn-922aa1e15e03ee2b32f50cd8a9d2c8376a19d22c.zip | |
drm/amd/display: Fix refcount over dc_sink.
Retain a dc_sink pointer until a new physical pointer
arrives in case of new display connected.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 |
1 files changed, 11 insertions, 1 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 396dbd661183..e5ba23253814 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -737,9 +737,17 @@ void amdgpu_dm_update_connector_after_detect( mutex_lock(&dev->mode_config.mutex); if (sink) { - if (aconnector->dc_sink) + if (aconnector->dc_sink) { amdgpu_dm_remove_sink_from_freesync_module( connector); + /* retain and release bellow are used for + * bump up refcount for sink because the link don't point + * to it anymore after disconnect so on next crtc to connector + * reshuffle by UMD we will get into unwanted dc_sink release + */ + if (aconnector->dc_sink != aconnector->dc_em_sink) + dc_sink_release(aconnector->dc_sink); + } aconnector->dc_sink = sink; amdgpu_dm_add_sink_to_freesync_module( connector, aconnector->edid); @@ -747,6 +755,8 @@ void amdgpu_dm_update_connector_after_detect( amdgpu_dm_remove_sink_from_freesync_module(connector); if (!aconnector->dc_sink) aconnector->dc_sink = aconnector->dc_em_sink; + else if (aconnector->dc_sink != aconnector->dc_em_sink) + dc_sink_retain(aconnector->dc_sink); } mutex_unlock(&dev->mode_config.mutex); |