From: Mikita Lipski mikita.lipski@amd.com
[why] Validate mst topology and the number of VCPI slots available for a new state. Fail if topology has no more bandwidth for a new state. [how] Pass the atomic state to drm_dp_mst_atomic_check to verify if the new topology is possible.
Cc: Lyude Paul lyude@redhat.com Signed-off-by: Mikita Lipski mikita.lipski@amd.com --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 +++++ 1 file changed, 5 insertions(+)
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 d700b962d338..39c239a08633 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7485,6 +7485,11 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev, if (ret) goto fail;
+ /* Perform validation of MST topology in the state*/ + ret = drm_dp_mst_atomic_check(state); + if (ret) + goto fail; + if (state->legacy_cursor_update) { /* * This is a fast cursor update coming from the plane update