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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.

Also added a flag for EDID checksum write in TEST_RESPONSE structure,
and simple spelling fix.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@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 3b070c60ea
commit 6e0ef9d85b
2 changed files with 31 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@ -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;
}

5
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@ -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;
};