From: Harry Wentland <harry.wentland@amd.com>
Date: Tue, 9 May 2017 10:41:42 -0400
Subject: drm/amd/display: Keep DVI_SINGLE_LINK signal if low clk
Git-commit: 56dcade33fd3c1681a43ebc250523249be3adbb0
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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 <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- 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
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(