Commit 1fb9d7b9 authored by Harry Wentland's avatar Harry Wentland Committed by Alex Deucher
Browse files

drm/amd/display: Create fake sink and stream for writeback connector 



[WHAT]
Writeback connectors don't have a physical sink but DC still
needs a sink to function. Create a fake sink and stream for
writeback connectors

Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ff73d4cd

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+22 −11
Original line number Diff line number Diff line
@@ -5715,13 +5715,13 @@ decide_crtc_timing_for_drm_display_mode(struct drm_display_mode *drm_mode, 
}



static struct dc_sink *

create_fake_sink(struct amdgpu_dm_connector *aconnector)

create_fake_sink(struct dc_link *link)

{

	struct dc_sink_init_data sink_init_data = { 0 };

	struct dc_sink *sink = NULL;



	sink_init_data.link = aconnector->dc_link;

	sink_init_data.sink_signal = aconnector->dc_link->connector_signal;

	sink_init_data.link = link;

	sink_init_data.sink_signal = link->connector_signal;



	sink = dc_sink_create(&sink_init_data);

	if (!sink) {
@@ -6092,6 +6092,7 @@ create_stream_for_sink(struct drm_connector *connector, 
	enum color_transfer_func tf = TRANSFER_FUNC_UNKNOWN;

	struct dsc_dec_dpcd_caps dsc_caps;



	struct dc_link *link = NULL;

	struct dc_sink *sink = NULL;



	drm_mode_init(&mode, drm_mode);
@@ -6105,15 +6106,25 @@ create_stream_for_sink(struct drm_connector *connector, 
	if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) {

		aconnector = NULL;

		aconnector = to_amdgpu_dm_connector(connector);

		if (!aconnector->dc_sink) {

			sink = create_fake_sink(aconnector);

		link = aconnector->dc_link;

	} else {

		struct drm_writeback_connector *wbcon = NULL;

		struct amdgpu_dm_wb_connector *dm_wbcon = NULL;



		wbcon = drm_connector_to_writeback(connector);

		dm_wbcon = to_amdgpu_dm_wb_connector(wbcon);

		link = dm_wbcon->link;

	}



	if (!aconnector || !aconnector->dc_sink) {

		sink = create_fake_sink(link);

		if (!sink)

			return stream;



	} else {

		sink = aconnector->dc_sink;

		dc_sink_retain(sink);

	}

	}



	stream = dc_create_stream_for_sink(sink);