Commit 909e8c9e authored by Charlene Liu's avatar Charlene Liu Committed by Alex Deucher
Browse files

drm/amd/display: fix single link black screen 



Don't fall back to dual link DVI mode if the connector
is single Link only.

Signed-off-by: default avatarCharlene Liu <charlene.liu@amd.com>
Reviewed-by: default avatarDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent fc82c5cb

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

+3 −1
Original line number Diff line number Diff line
@@ -1204,6 +1204,7 @@ bool resource_validate_attach_surfaces( 


/* Maximum TMDS single link pixel clock 165MHz */

#define TMDS_MAX_PIXEL_CLOCK_IN_KHZ 165000

#define TMDS_MAX_PIXEL_CLOCK_IN_KHZ_UPMOST 297000



static void set_stream_engine_in_use(

		struct resource_context *res_ctx,
@@ -1331,7 +1332,8 @@ static void update_stream_signal(struct core_stream *stream) 
	}



	if (dc_is_dvi_signal(stream->signal)) {

		if (stream->public.timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ)

		if (stream->public.timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ_UPMOST &&

			stream->public.sink->sink_signal != SIGNAL_TYPE_DVI_SINGLE_LINK)

			stream->signal = SIGNAL_TYPE_DVI_DUAL_LINK;

		else

			stream->signal = SIGNAL_TYPE_DVI_SINGLE_LINK;