commit c32699caeca802cfa3416f798abcff719d1633f7
author Jasdeep Dhillon <jdhillon@amd.com> Wed Jan 25 10:50:19 2023 -0500
committer Alex Deucher <alexander.deucher@amd.com> Tue Feb 28 14:29:35 2023 -0500
tree 4a5a821d97af21e8592e7a0f05f0e6b5d2932673
parent c69fc3d0de6ca79d946a2715f8745a1eae69c3d8

drm/amd/display: Updating Video Format Fall Back Policy.

[WHY]
Adding 1920x1080 as fail safe mode for
Video Format Fall Back Policy.

Reviewed-by: Jerry Zuo <Jerry.Zuo@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Jasdeep Dhillon <jdhillon@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 9534bb8..cfbde4f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7160,12 +7160,17 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
 			to_amdgpu_dm_connector(connector);
 	struct drm_encoder *encoder;
 	struct edid *edid = amdgpu_dm_connector->edid;
+	struct dc_link_settings *verified_link_cap =
+			&amdgpu_dm_connector->dc_link->verified_link_cap;
 
 	encoder = amdgpu_dm_connector_to_encoder(connector);
 
 	if (!drm_edid_is_valid(edid)) {
 		amdgpu_dm_connector->num_modes =
 				drm_add_modes_noedid(connector, 640, 480);
+		if (link_dp_get_encoding_format(verified_link_cap) == DP_128b_132b_ENCODING)
+			amdgpu_dm_connector->num_modes +=
+				drm_add_modes_noedid(connector, 1920, 1080);
 	} else {
 		amdgpu_dm_connector_ddc_get_modes(connector, edid);
 		amdgpu_dm_connector_add_common_modes(encoder, connector);