diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 32 |
1 files changed, 32 insertions, 0 deletions
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 f3ce37664143..2e74ccf7df5b 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 @@ -56,6 +56,8 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, ssize_t result = 0; struct aux_payload payload; enum aux_return_code_type operation_result; + struct amdgpu_device *adev; + struct ddc_service *ddc; if (WARN_ON(msg->size > 16)) return -E2BIG; @@ -74,6 +76,21 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload, &operation_result); + /* + * w/a on certain intel platform where hpd is unexpected to pull low during + * 1st sideband message transaction by return AUX_RET_ERROR_HPD_DISCON + * aux transaction is succuess in such case, therefore bypass the error + */ + ddc = TO_DM_AUX(aux)->ddc_service; + adev = ddc->ctx->driver_context; + if (adev->dm.aux_hpd_discon_quirk) { + if (msg->address == DP_SIDEBAND_MSG_DOWN_REQ_BASE && + operation_result == AUX_RET_ERROR_HPD_DISCON) { + result = 0; + operation_result = AUX_RET_SUCCESS; + } + } + if (payload.write && result >= 0) result = msg->size; @@ -160,7 +177,10 @@ amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector) dc_sink_release(dc_sink); aconnector->dc_sink = NULL; + aconnector->edid = NULL; } + + aconnector->mst_status = MST_STATUS_DEFAULT; drm_modeset_unlock(&root->mst_mgr.base.lock); } @@ -261,6 +281,9 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector) edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); if (!edid) { + amdgpu_dm_set_mst_status(&aconnector->mst_status, + MST_REMOTE_EDID, false); + drm_connector_update_edid_property( &aconnector->base, NULL); @@ -291,6 +314,8 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector) } aconnector->edid = edid; + amdgpu_dm_set_mst_status(&aconnector->mst_status, + MST_REMOTE_EDID, true); } if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) { @@ -411,6 +436,11 @@ dm_dp_mst_detect(struct drm_connector *connector, dc_sink_release(aconnector->dc_sink); aconnector->dc_sink = NULL; + aconnector->edid = NULL; + + amdgpu_dm_set_mst_status(&aconnector->mst_status, + MST_REMOTE_EDID | MST_ALLOCATE_NEW_PAYLOAD | MST_CLEAR_ALLOCATED_PAYLOAD, + false); } return connection_status; @@ -507,6 +537,8 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, connector = &aconnector->base; aconnector->port = port; aconnector->mst_port = master; + amdgpu_dm_set_mst_status(&aconnector->mst_status, + MST_PROBE, true); if (drm_connector_init( dev, |