From 1a0e348e5693b7acde02e50319b3237657b7981a Mon Sep 17 00:00:00 2001 From: David Francis Date: Tue, 25 Sep 2018 11:23:31 -0400 Subject: [PATCH] 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 Reviewed-by: Roman Li Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- 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 de190935f0a4..e3624ca24574 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 }; -- 2.30.2