From: Alex Deucher Date: Tue, 1 Jul 2025 20:13:17 +0000 (-0400) Subject: drm/amd/display: Use scaling for non-native resolutions on LVDS X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=df2719088b6a8084960ed6e2ddc7066ffc5b558d;p=thirdparty%2Fkernel%2Flinux.git drm/amd/display: Use scaling for non-native resolutions on LVDS [Why] Common resolutions are added to supported modes to enable compatibility scenarios that compositors may use to do things like clone displays. There is no guarantee however that the panel will natively support these modes. [How] If the compositor hasn't enabled scaling but a non-native resolution has been picked for an LVDS panel turn the scaler on anyway. This will ensure compatibility. 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 7a4fca9a61bbe..096b23ad4845d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7901,7 +7901,8 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder, int clock, bpp = 0; bool is_y420 = false; - if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) { + if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) || + (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)) { struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder); struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode; enum drm_mode_status result;