From: Charlene Liu <charlene.liu@xxxxxxx>
Don't fall back to dual link DVI mode if the connector
is single Link only.
Change-Id: Ifef1bc5d4e38ab163e13de33fc8494baaf3b1d6b
Signed-off-by: Charlene Liu <charlene.liu at amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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 236c8e9c0f6a..9f6a99f850ec 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;
--
2.11.0
