From: Mikita Lipski <[email protected]> Extract edid's checksum and send it back for verification if EDID_TEST is requested.
Also added a flag for EDID checksum write in TEST_RESPONSE structure, and simple spelling fix. Signed-off-by: Mikita Lipski <[email protected]> Reviewed-by: Tony Cheng <[email protected]> Acked-by: Harry Wentland <[email protected]> --- .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 28 +++++++++++++++++++ drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 5 ++-- 2 files changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index bd449351803f..dea49dc9b518 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -497,6 +497,34 @@ 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}; + + 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; } diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h index 90bccd5ccaa2..da93ab43f2d8 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -430,7 +430,7 @@ union test_request { struct { uint8_t LINK_TRAINING :1; uint8_t LINK_TEST_PATTRN :1; - uint8_t EDID_REAT :1; + uint8_t EDID_READ :1; uint8_t PHY_TEST_PATTERN :1; uint8_t AUDIO_TEST_PATTERN :1; uint8_t RESERVED :1; @@ -443,7 +443,8 @@ union test_response { struct { uint8_t ACK :1; uint8_t NO_ACK :1; - uint8_t RESERVED :6; + uint8_t EDID_CHECKSUM_WRITE:1; + uint8_t RESERVED :5; } bits; uint8_t raw; }; -- 2.17.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
