drm/amd/display: Add dsc pre-validation in atomic check

[Why]
The previous change:
"Add affected crtcs to atomic state for dsc mst unplug"
forces modeset on all added crctc regardless whether timing changed or not.
Per our implementation of dsc we need modeset only if timing changed.
Otherwise dsc can be programmed incorrectly leading to dsc engine hang.

[How]
During atomic_check pre-compute dsc params.
Only set mode_changed if timing is changed.

Reviewed-by: Hersen Wu <hersenwu@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 28a2b9d476b4..6a908d736d6a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -737,4 +737,16 @@ int amdgpu_dm_process_dmub_aux_transfer_sync(bool is_cmd_aux,
 
 bool check_seamless_boot_capability(struct amdgpu_device *adev);
 
+struct dc_stream_state *
+	create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
+					const struct drm_display_mode *drm_mode,
+					const struct dm_connector_state *dm_state,
+					const struct dc_stream_state *old_stream);
+
+int dm_atomic_get_state(struct drm_atomic_state *state,
+			struct dm_atomic_state **dm_state);
+
+struct amdgpu_dm_connector *
+amdgpu_dm_find_first_crtc_matching_connector(struct drm_atomic_state *state,
+					     struct drm_crtc *crtc);
 #endif /* __AMDGPU_DM_H__ */