From: Mikita Lipski <mikita.lip...@amd.com>
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 <ly...@redhat.com>
Signed-off-by: David Francis <david.fran...@amd.com>
Signed-off-by: Mikita Lipski <mikita.lip...@amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 33 +++++++++++++++++++
1 file changed, 33 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 2ac3a2f0b452..909665427110 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7930,6 +7930,29 @@ dm_determine_update_type_for_commit(struct
amdgpu_display_manager *dm,
return ret;
}
+static int add_affected_mst_dsc_crtcs(struct drm_atomic_state *state, struct
drm_crtc *crtc)
+{
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state;
+ struct amdgpu_dm_connector *aconnector = NULL;
+ int i;
+ for_each_new_connector_in_state(state, connector, conn_state, i) {
+ if (conn_state->crtc != crtc)
+ continue;
+
+ aconnector = to_amdgpu_dm_connector(connector);
+ if (!aconnector->port)
+ aconnector = NULL;
+ else
+ break;
+ }
+
+ if (!aconnector)
+ return 0;
+
+ return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_mgr);
+}
+
/**
* amdgpu_dm_atomic_check() - Atomic check implementation for AMDgpu DM.
* @dev: The DRM device
@@ -7982,6 +8005,16 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
if (ret)
goto fail;
+ if (adev->asic_type >= CHIP_NAVI10) {
+ for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
+ if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
+ ret = add_affected_mst_dsc_crtcs(state, crtc);
+ if (ret)
+ goto fail;
+ }
+ }
+ }
+
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
if (!drm_atomic_crtc_needs_modeset(new_crtc_state) &&
!new_crtc_state->color_mgmt_changed &&
--
2.17.1
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