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;