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drm/amd/display: Disable 4k 60 HDMI on DCE11

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[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>
This commit is contained in:
David Francis
2018-09-25 11:23:31 -04:00
committed by Alex Deucher
parent 7179d24040
commit 1a0e348e56
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
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@@ -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
};