From 64827cadcce3023521b687b7db75c7bc388ca201 Mon Sep 17 00:00:00 2001 From: Samson Tam Date: Fri, 12 Apr 2019 18:23:11 -0400 Subject: drm/amd/display: block passive dongle EDID Emulation for USB-C ports [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 Reviewed-by: Tony Cheng Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c') diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c index fd5266a58297..12bc7ee66b18 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c @@ -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; } -- cgit v1.2.3