drm/amd/display: When signal type of sink is none, use link type for stream

Signed-off-by: Joshua Aberback <Joshua.Aberback@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index a82f2d6..59770bc 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -984,19 +984,20 @@ static void update_stream_signal(struct core_stream *stream)
 {
        const struct dc_sink *dc_sink = stream->public.sink;
 
-       stream->signal = dc_sink->sink_signal;
-       /* For asic supports dual link DVI, we should adjust signal type
-        * based on timing pixel clock. If pixel clock more than 165Mhz,
-        * signal is dual link, otherwise, single link.
-        */
-       if (dc_sink->sink_signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
-                       dc_sink->sink_signal == SIGNAL_TYPE_DVI_DUAL_LINK) {
-               if (stream->public.timing.pix_clk_khz >
-                                               TMDS_MAX_PIXEL_CLOCK_IN_KHZ)
+       if (dc_sink->sink_signal == SIGNAL_TYPE_NONE)
+               stream->signal = stream->sink->link->public.connector_signal;
+       else if (dc_sink->sink_signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
+                       dc_sink->sink_signal == SIGNAL_TYPE_DVI_DUAL_LINK)
+               /* For asic supports dual link DVI, we should adjust signal type
+                * based on timing pixel clock. If pixel clock more than 165Mhz,
+                * signal is dual link, otherwise, single link.
+                */
+               if (stream->public.timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ)
                        stream->signal = SIGNAL_TYPE_DVI_DUAL_LINK;
                else
                        stream->signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
-       }
+       else
+               stream->signal = dc_sink->sink_signal;
 }
 
 bool resource_is_stream_unchanged(