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drm/amd/display: fix single link black screen

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

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2017-06-05 16:54:33 -04:00 committed by Alex Deucher
parent fc82c5cb30
commit 909e8c9e41
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -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;