Commit 2a66c0c9 authored by Mikita Lipski's avatar Mikita Lipski Committed by Alex Deucher
Browse files

drm/amd/display: Write TEST_EDID_CHECKSUM_WRITE for EDID tests 



Extract edid's checksum and send it back for verification if EDID_TEST
is requested.

Signed-off-by: default avatarMikita Lipski <mikita.lipski@amd.com>
Acked-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 08c73e89

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

+27 −3
Original line number Diff line number Diff line
@@ -885,10 +885,34 @@ enum dc_edid_status dm_helpers_read_local_edid( 
		DRM_ERROR("EDID err: %d, on connector: %s",

				edid_status,

				aconnector->base.name);

	if (link->aux_mode) {

		union test_request test_request = {0};

		union test_response test_response = {0};



	/* DP Compliance Test 4.2.2.3 */

	if (link->aux_mode)

		drm_dp_send_real_edid_checksum(&aconnector->dm_dp_aux.aux, sink->dc_edid.raw_edid[sink->dc_edid.length-1]);

		dm_helpers_dp_read_dpcd(ctx,

					link,

					DP_TEST_REQUEST,

					&test_request.raw,

					sizeof(union test_request));



		if (!test_request.bits.EDID_READ)

			return edid_status;



		test_response.bits.EDID_CHECKSUM_WRITE = 1;



		dm_helpers_dp_write_dpcd(ctx,

					link,

					DP_TEST_EDID_CHECKSUM,

					&sink->dc_edid.raw_edid[sink->dc_edid.length-1],

					1);



		dm_helpers_dp_write_dpcd(ctx,

					link,

					DP_TEST_RESPONSE,

					&test_response.raw,

					sizeof(test_response));



	}



	return edid_status;

}