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drm/amd/display: Write TEST_EDID_CHECKSUM_WRITE for EDID tests

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

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mikita Lipski 2018-05-17 15:44:20 -04:00 committed by Alex Deucher
parent 08c73e8968
commit 2a66c0c9d2
1 changed files with 27 additions and 3 deletions
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30
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@ -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;
}