drm/amd/display: Trigger modesets on MST DSC connectors
Whenever a connector on an MST network is attached, detached, or undergoes a modeset, the DSC configs for each stream on that topology will be recalculated. This can change their required bandwidth, requiring a full reprogramming, as though a modeset was performed, even if that stream did not change timing. Therefore, whenever a crtc has drm_atomic_crtc_needs_modeset, for each crtc that shares a MST topology with that stream and supports DSC, add that crtc (and all affected connectors and planes) to the atomic state and set mode_changed on its state v2: Do this check only on Navi and before adding connectors and planes on modesetting crtcs v3: Call the drm_dp_mst_add_affected_dsc_crtcs() to update all affected CRTCs Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: David Francis <David.Francis@amd.com> Signed-off-by: Mikita Lipski <mikita.lipski@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -7893,6 +7893,29 @@ cleanup:
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return ret;
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}
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static int add_affected_mst_dsc_crtcs(struct drm_atomic_state *state, struct drm_crtc *crtc)
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{
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struct drm_connector *connector;
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struct drm_connector_state *conn_state;
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struct amdgpu_dm_connector *aconnector = NULL;
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int i;
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for_each_new_connector_in_state(state, connector, conn_state, i) {
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if (conn_state->crtc != crtc)
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continue;
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aconnector = to_amdgpu_dm_connector(connector);
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if (!aconnector->port || !aconnector->mst_port)
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aconnector = NULL;
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else
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break;
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}
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if (!aconnector)
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return 0;
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return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_port->mst_mgr);
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}
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/**
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* amdgpu_dm_atomic_check() - Atomic check implementation for AMDgpu DM.
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* @dev: The DRM device
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@ -7945,6 +7968,16 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
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if (ret)
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goto fail;
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if (adev->asic_type >= CHIP_NAVI10) {
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for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
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if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
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ret = add_affected_mst_dsc_crtcs(state, crtc);
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if (ret)
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goto fail;
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}
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}
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}
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for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
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if (!drm_atomic_crtc_needs_modeset(new_crtc_state) &&
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!new_crtc_state->color_mgmt_changed &&
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