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From eb076cfe0b9da32a52ce24215433ec7b5a1f4c16 Mon Sep 17 00:00:00 2001
From: David Francis <David.Francis@amd.com>
Date: Tue, 25 Sep 2018 11:23:31 -0400
Subject: [PATCH 0655/2940] drm/amd/display: Disable 4k 60 HDMI on DCE11
[Why]
Carrizo and Stoney have severe corruption when trying to power
4k 60 monitors over HDMI connectors that support 4k 60.
Carrizo and Stoney require retimers and redrivers to support 4k 60
over HDMI. This driver does not currently support these. Thus, 4k 60
HDMI (and all other modes requiring over 300MHz) should be disabled.
[How]
Reduce the dce11 HDMI pixel clock cap to 300000kHz.
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
index c5714ebb9cea..1a90e1a38055 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
@@ -568,7 +568,7 @@ static struct input_pixel_processor *dce110_ipp_create(
static const struct encoder_feature_support link_enc_feature = {
.max_hdmi_deep_color = COLOR_DEPTH_121212,
- .max_hdmi_pixel_clock = 594000,
+ .max_hdmi_pixel_clock = 300000,
.flags.bits.IS_HBR2_CAPABLE = true,
.flags.bits.IS_TPS3_CAPABLE = true
};
--
2.17.1
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