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

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[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: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2023-12-01 06:25:30 -07:00 committed by Alex Deucher
parent ff73d4cdde
commit 1fb9d7b975
1 changed files with 22 additions and 11 deletions
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33
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -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);
@ -6105,14 +6106,24 @@ 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);
if (!sink)
return stream;
} else {
sink = aconnector->dc_sink;
dc_sink_retain(sink);
}
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);