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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 f5ce9f3cba
commit 64827cadcc
4 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
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@@ -1313,6 +1313,8 @@ static enum bp_result bios_parser_get_encoder_cap_info(
ATOM_ENCODER_CAP_RECORD_HBR3_EN) ? 1 : 0;
info->HDMI_6GB_EN = (record->encodercaps &
ATOM_ENCODER_CAP_RECORD_HDMI6Gbps_EN) ? 1 : 0;
info->DP_IS_USB_C = (record->encodercaps &
ATOM_ENCODER_CAP_RECORD_USB_C_TYPE) ? 1 : 0;
return BP_RESULT_OK;
}