From: Mikita Lipski <mikita.lipski@xxxxxxx>
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 at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <harry.wentland at amd.com>
---
.../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
