diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0655-drm-amd-display-Disable-4k-60-HDMI-on-DCE11.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0655-drm-amd-display-Disable-4k-60-HDMI-on-DCE11.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0655-drm-amd-display-Disable-4k-60-HDMI-on-DCE11.patch b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0655-drm-amd-display-Disable-4k-60-HDMI-on-DCE11.patch new file mode 100644 index 00000000..7978e156 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0655-drm-amd-display-Disable-4k-60-HDMI-on-DCE11.patch @@ -0,0 +1,40 @@ +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 + |