diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_backend.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_backend.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index 7dd24eb03f89..735fea7ead0b 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -449,16 +449,32 @@ static bool sun4i_backend_plane_uses_frontend(struct drm_plane_state *state) { struct sun4i_layer *layer = plane_to_sun4i_layer(state->plane); struct sun4i_backend *backend = layer->backend; + uint32_t format = state->fb->format->format; if (IS_ERR(backend->frontend)) return false; + if (!sun4i_frontend_format_is_supported(format)) + return false; + + if (!sun4i_backend_format_is_supported(format)) + return true; + /* * TODO: The backend alone allows 2x and 4x integer scaling, including * support for an alpha component (which the frontend doesn't support). - * Use the backend directly instead of the frontend in this case. + * Use the backend directly instead of the frontend in this case, with + * another test to return false. + */ + + if (sun4i_backend_plane_uses_scaler(state)) + return true; + + /* + * Here the format is supported by both the frontend and the backend + * and no frontend scaling is required, so use the backend directly. */ - return sun4i_backend_plane_uses_scaler(state); + return false; } static void sun4i_backend_atomic_begin(struct sunxi_engine *engine, |