From 02dcb4b9a131290e2fe0c760cf840a294405bc80 Mon Sep 17 00:00:00 2001 From: "Jerry (Fangzhi) Zuo" Date: Wed, 29 Apr 2020 13:42:16 -0400 Subject: [PATCH] drm/amd/display: Add dm support for DP 1.4 Compliance edid corruption test It works together with drm framework "drm: Add support for DP 1.4 Compliance edid corruption test" Add the edid validity check scenario when edid base block is read back with error. Send back real edid checksum and enable fail-safe mode in DC. Signed-off-by: Jerry (Fangzhi) Zuo Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 40 ++++++------------- 1 file changed, 13 insertions(+), 27 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 c407f06cd1f50..b086d5c906e0f 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 @@ -554,6 +554,7 @@ enum dc_edid_status dm_helpers_read_local_edid( struct dc_sink *sink) { struct amdgpu_dm_connector *aconnector = link->priv; + struct drm_connector *connector = &aconnector->base; struct i2c_adapter *ddc; int retry = 3; enum dc_edid_status edid_status; @@ -571,6 +572,15 @@ enum dc_edid_status dm_helpers_read_local_edid( edid = drm_get_edid(&aconnector->base, ddc); + /* DP Compliance Test 4.2.2.6 */ + if (link->aux_mode && connector->edid_corrupt) + drm_dp_send_real_edid_checksum(&aconnector->dm_dp_aux.aux, connector->real_edid_checksum); + + if (!edid && connector->edid_corrupt) { + connector->edid_corrupt = false; + return EDID_BAD_CHECKSUM; + } + if (!edid) return EDID_NO_RESPONSE; @@ -605,34 +615,10 @@ 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)); - - } + /* 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]); return edid_status; } -- 2.39.5