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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
View File

@ -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;
}

2
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_link_encoder.c
View File

@ -726,6 +726,8 @@ void dcn10_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__,

1
drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h
View File

@ -59,6 +59,7 @@ struct encoder_feature_support {
uint32_t IS_TPS3_CAPABLE:1;
uint32_t IS_TPS4_CAPABLE:1;
uint32_t HDMI_6GB_EN:1;
uint32_t DP_IS_USB_C:1;
} bits;
uint32_t raw;
} flags;

3
drivers/gpu/drm/amd/display/include/bios_parser_types.h
View File

@ -307,7 +307,8 @@ struct bp_encoder_cap_info {
uint32_t DP_HBR2_EN:1;
uint32_t DP_HBR3_EN:1;
uint32_t HDMI_6GB_EN:1;
uint32_t RESERVED:30;
uint32_t DP_IS_USB_C:1;
uint32_t RESERVED:27;
};
#endif /*__DAL_BIOS_PARSER_TYPES_H__ */