From: Charlene Liu <charlene.liu@amd.com>
Date: Mon, 17 Jul 2017 17:46:49 -0400
Subject: drm/amd/display: fix DVI connected to HDMI connector max tmds clock
Git-commit: 83572340097012c91de3f96e52797491c79cfe43
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -830,6 +830,12 @@ bool dce110_link_encoder_validate_dvi_ou
if (crtc_timing->pixel_encoding != PIXEL_ENCODING_RGB)
return false;
+ /*connect DVI via adpater's HDMI connector*/
+ if ((connector_signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
+ connector_signal == SIGNAL_TYPE_HDMI_TYPE_A) &&
+ signal != SIGNAL_TYPE_HDMI_TYPE_A &&
+ crtc_timing->pix_clk_khz > TMDS_MAX_PIXEL_CLOCK)
+ return false;
if (crtc_timing->pix_clk_khz < TMDS_MIN_PIXEL_CLOCK)
return false;