The backend allows integer-only scaling but can handle alpha components, unlike the frontend. It could be useful to add support for this eventually, so add a short TODO comment describing the situation.
Signed-off-by: Paul Kocialkowski <[email protected]> --- drivers/gpu/drm/sun4i/sun4i_backend.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index 67b4bb4f5365..c3444246755b 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -426,6 +426,11 @@ static bool sun4i_backend_plane_uses_frontend(struct drm_plane_state *state) if (IS_ERR(backend->frontend)) return false; + /* + * 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. + */ return sun4i_backend_plane_uses_scaler(state); } -- 2.19.1 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
