diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 37 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 3 |
2 files changed, 29 insertions, 11 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 3cd84dcb266b..b2d859f32d54 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -4407,24 +4407,39 @@ void dpcd_set_source_specific_data(struct dc_link *link) { if (!link->dc->vendor_signature.is_valid) { enum dc_status result_write_min_hblank = DC_NOT_SUPPORTED; - struct dpcd_amd_signature amd_signature; - amd_signature.AMD_IEEE_TxSignature_byte1 = 0x0; - amd_signature.AMD_IEEE_TxSignature_byte2 = 0x0; - amd_signature.AMD_IEEE_TxSignature_byte3 = 0x1A; - amd_signature.device_id_byte1 = + struct dpcd_amd_signature amd_signature = {0}; + struct dpcd_amd_device_id amd_device_id = {0}; + + amd_device_id.device_id_byte1 = (uint8_t)(link->ctx->asic_id.chip_id); - amd_signature.device_id_byte2 = + amd_device_id.device_id_byte2 = (uint8_t)(link->ctx->asic_id.chip_id >> 8); - memset(&amd_signature.zero, 0, 4); - amd_signature.dce_version = + amd_device_id.dce_version = (uint8_t)(link->ctx->dce_version); - amd_signature.dal_version_byte1 = 0x0; // needed? where to get? - amd_signature.dal_version_byte2 = 0x0; // needed? where to get? + amd_device_id.dal_version_byte1 = 0x0; // needed? where to get? + amd_device_id.dal_version_byte2 = 0x0; // needed? where to get? - core_link_write_dpcd(link, DP_SOURCE_OUI, + core_link_read_dpcd(link, DP_SOURCE_OUI, (uint8_t *)(&amd_signature), sizeof(amd_signature)); + if (!((amd_signature.AMD_IEEE_TxSignature_byte1 == 0x0) && + (amd_signature.AMD_IEEE_TxSignature_byte2 == 0x0) && + (amd_signature.AMD_IEEE_TxSignature_byte3 == 0x1A))) { + + amd_signature.AMD_IEEE_TxSignature_byte1 = 0x0; + amd_signature.AMD_IEEE_TxSignature_byte2 = 0x0; + amd_signature.AMD_IEEE_TxSignature_byte3 = 0x1A; + + core_link_write_dpcd(link, DP_SOURCE_OUI, + (uint8_t *)(&amd_signature), + sizeof(amd_signature)); + } + + core_link_write_dpcd(link, DP_SOURCE_OUI+0x03, + (uint8_t *)(&amd_device_id), + sizeof(amd_device_id)); + if (link->ctx->dce_version >= DCN_VERSION_2_0 && link->dc->caps.min_horizontal_blanking_period != 0) { 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 80a2191a3115..cc6fb838420e 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -451,6 +451,9 @@ struct dpcd_amd_signature { uint8_t AMD_IEEE_TxSignature_byte1; uint8_t AMD_IEEE_TxSignature_byte2; uint8_t AMD_IEEE_TxSignature_byte3; +}; + +struct dpcd_amd_device_id { uint8_t device_id_byte1; uint8_t device_id_byte2; uint8_t zero[4]; |