From: Charlene Liu Date: Mon, 5 Jun 2017 20:54:33 +0000 (-0400) Subject: drm/amd/display: fix single link black screen X-Git-Tag: v5.15~9960^2~23^2~430 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=909e8c9e417945f313b68ed6c5a559fe5266be8b;p=platform%2Fkernel%2Flinux-starfive.git 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: Charlene Liu Reviewed-by: Dmytro Laktyushkin Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- 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 e4a6636..b7f31b9 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -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;