drm_atomic_helper_check_planes — validate state object for planes changes
int drm_atomic_helper_check_planes ( | struct drm_device * dev, |
struct drm_atomic_state * state); |
Check the state object to see if the requested state is physically possible. This does all the plane update related checks using by calling into the ->atomic_check hooks provided by the driver.
It also sets crtc_state->planes_changed to indicate that a crtc has updated planes.
RETURNS Zero for success or -errno