[PATCH 05/31] drm/amd/display: Keep DVI_SINGLE_LINK signal if low clk

[Harry Wentland]

If user is using DVI->HDMI dongle dual link signal might pose a
problem. Keep single link signal type if clk is lower than
max tmds clk.

Change-Id: I6ad1009bb195e0d1ba91a9801c6125778419f739
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

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 ae8b221c85aa..9588217e0220 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1283,9 +1283,12 @@ static void update_stream_signal(struct core_stream *stream)
 		stream->signal = stream->public.output_signal;
 	}
 
-	if (stream->signal == SIGNAL_TYPE_DVI_SINGLE_LINK &&
-		stream->public.timing.pix_clk_khz > TMDS_MAX_PIXEL_CLOCK_IN_KHZ)
-		stream->signal = SIGNAL_TYPE_DVI_DUAL_LINK;
+	if (dc_is_dvi_signal(stream->signal)) {
+		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;
+	}
 }
 
 bool resource_is_stream_unchanged(
-- 
2.11.0