From: Alex Deucher Date: Tue, 1 Jul 2025 20:09:19 +0000 (-0400) Subject: drm/amd/display: Disable common modes for LVDS X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6d396e7ac1ce36079147933aa77ea977b03a8a9d;p=thirdparty%2Flinux.git drm/amd/display: Disable common modes for LVDS [Why] Common modes are added to LVDS for compatibility in clone mode, but not all panels support them. Non-native modes were disabled in the past but this caused problems because compositors didn't use scaling for non native modes. Now non-native modes on LVDS will enable the scaler by default. [How] Check the connector type. If the connector is LVDS avoid adding common modes. Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- 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 3dd4f9e9931d2..7a4fca9a61bbe 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8374,7 +8374,8 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector) drm_add_modes_noedid(connector, 1920, 1080); } else { amdgpu_dm_connector_ddc_get_modes(connector, drm_edid); - if (encoder && connector->connector_type != DRM_MODE_CONNECTOR_eDP) + if (encoder && (connector->connector_type != DRM_MODE_CONNECTOR_eDP) && + (connector->connector_type != DRM_MODE_CONNECTOR_LVDS)) amdgpu_dm_connector_add_common_modes(encoder, connector); amdgpu_dm_connector_add_freesync_modes(connector, drm_edid); }