From 21b16878bc48afc8d331cc6331509f1a65d7e3cf Mon Sep 17 00:00:00 2001 From: Harry Wentland Date: Tue, 9 May 2017 10:41:42 -0400 Subject: [PATCH 0400/4131] drm/amd/display: Keep DVI_SINGLE_LINK signal if low clk 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. Signed-off-by: Harry Wentland Signed-off-by: Alex Deucher --- 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 ae8b221..9588217 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( -- 2.7.4