Commit 566b4252 authored by Vitaly Prosyak's avatar Vitaly Prosyak Committed by Alex Deucher
Browse files

drm/amd/display: add new active dongle to existent w/a 



[Why & How]
Dongle 0x00E04C power down all internal circuits including
AUX communication preventing reading DPCD table.
Encoder will skip DP RX power down on disable output
to keep receiver powered all the time.

Signed-off-by: default avatarVitaly Prosyak <vitaly.prosyak@amd.com>
Reviewed-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: default avatarVitaly Prosyak <Vitaly.Prosyak@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b356843e

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+1 −0
Original line number Diff line number Diff line
@@ -2721,6 +2721,7 @@ static void dp_wa_power_up_0010FA(struct dc_link *link, uint8_t *dpcd_data, 
		 * keep receiver powered all the time.*/

		case DP_BRANCH_DEVICE_ID_0010FA:

		case DP_BRANCH_DEVICE_ID_0080E1:

		case DP_BRANCH_DEVICE_ID_00E04C:

			link->wa_flags.dp_keep_receiver_powered = true;

			break;

drivers/gpu/drm/amd/display/include/ddc_service_types.h

+2 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ 
#define DP_BRANCH_DEVICE_ID_0022B9 0x0022B9

#define DP_BRANCH_DEVICE_ID_00001A 0x00001A

#define DP_BRANCH_DEVICE_ID_0080E1 0x0080e1

#define DP_BRANCH_DEVICE_ID_90CC24 0x90CC24

#define DP_BRANCH_DEVICE_ID_00E04C 0x00E04C



enum ddc_result {

	DDC_RESULT_UNKNOWN = 0,

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