From: Hersen Wu <hersenxs.wu@xxxxxxx>
commit e749dd10e5f292061ad63d2b030194bf7d7d452c upstream.
[Why] most edp support only timings from edid. applying
non-edid timings, especially those timings out of edp
bandwidth, may damage edp.
[How] do not add non-edid timings for edp.
Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Stylon Wang <stylon.wang@xxxxxxx>
Signed-off-by: Hersen Wu <hersenxs.wu@xxxxxxx>
Reviewed-by: Roman Li <roman.li@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7170,7 +7170,13 @@ static int amdgpu_dm_connector_get_modes
drm_add_modes_noedid(connector, 640, 480);
} else {
amdgpu_dm_connector_ddc_get_modes(connector, edid);
- amdgpu_dm_connector_add_common_modes(encoder, connector);
+ /* most eDP supports only timings from its edid,
+ * usually only detailed timings are available
+ * from eDP edid. timings which are not from edid
+ * may damage eDP
+ */
+ if (connector->connector_type != DRM_MODE_CONNECTOR_eDP)
+ amdgpu_dm_connector_add_common_modes(encoder, connector);
amdgpu_dm_connector_add_freesync_modes(connector, edid);
}
amdgpu_dm_fbc_init(connector);
