Hook this into amdgpu's atomic check for their connectors so they never get modesets on no-longer-present MST connectors. We'll also expand on this later once we add DP MST fallback retraining support.
As well, turns out that the only atomic DRM driver without the ->best_encoder() bug is amdgpu. Congrats AMD! Signed-off-by: Lyude Paul <ly...@redhat.com> --- .../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index 9a300732ba37..d011a39f17b2 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -294,10 +294,22 @@ static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector) return &amdgpu_dm_connector->mst_encoder->base; } +static int +amdgpu_dm_mst_connector_atomic_check(struct drm_connector *connector, + struct drm_connector_state *new_cstate) +{ + struct amdgpu_dm_connector *aconnector = + to_amdgpu_dm_connector(connector); + + return drm_dp_mst_connector_atomic_check(connector, new_cstate, + &aconnector->mst_mgr); +} + static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = { .get_modes = dm_dp_mst_get_modes, .mode_valid = amdgpu_dm_connector_mode_valid, .best_encoder = dm_mst_best_encoder, + .atomic_check = amdgpu_dm_mst_connector_atomic_check, }; static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder) -- 2.17.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel