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drm/amd/display: Trigger modesets on MST DSC connectors

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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>
This commit is contained in:
Mikita Lipski 2019-11-12 09:14:15 -05:00 committed by Alex Deucher
parent 8ec046716c
commit 44be939ff7
1 changed files with 33 additions and 0 deletions
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33
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -7893,6 +7893,29 @@ cleanup:
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->mst_port)
aconnector = NULL;
else
break;
}
if (!aconnector)
return 0;
return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_port->mst_mgr);
}
/**
* amdgpu_dm_atomic_check() - Atomic check implementation for AMDgpu DM.
* @dev: The DRM device
@ -7945,6 +7968,16 @@ 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 &&