From: Mikita Lipski <mikita.lipski@xxxxxxx>
[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@xxxxxxxxxx>
Signed-off-by: Mikita Lipski <mikita.lipski@xxxxxxx>
---
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
--
2.17.1
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