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drm/amd/display: block passive dongle EDID Emulation for USB-C ports

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[Why]
Emulating passive dongle on USB-C port causes issue on some asics.

[How]
Check for DP_IS_USB_C flag in bios parser and propagate it to
encoder features flags. If DP_IS_USB_C flag is set and it is trying to
emulate passive dongle, then return fail.

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Samson Tam 2019-04-12 18:23:11 -04:00 committed by Alex Deucher
parent 040a4d63bd
commit 796c9ece2e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.c
View File

@ -447,6 +447,8 @@ void dcn20_link_encoder_construct(
enc10->base.features.flags.bits.IS_HBR3_CAPABLE =
bp_cap_info.DP_HBR3_EN;
enc10->base.features.flags.bits.HDMI_6GB_EN = bp_cap_info.HDMI_6GB_EN;
enc10->base.features.flags.bits.DP_IS_USB_C =
bp_cap_info.DP_IS_USB_C;
} else {
DC_LOG_WARNING("%s: Failed to get encoder_cap_info from VBIOS with error code %d!\n",
__func__,