Arguments

Description

Check the state object to see if the requested state is physically possible. Only crtcs and planes have check callbacks, so for any additional (global) checking that a driver needs it can simply wrap that around this function. Drivers without such needs can directly use this as their ->atomic_check callback.

This just wraps the two parts of the state checking for planes and modeset

state in the default order

First it calls drm_atomic_helper_check_modeset and then drm_atomic_helper_check_planes. The assumption is that the ->atomic_check functions depend upon an updated adjusted_mode.clock to e.g. properly compute watermarks.

RETURNS Zero for success or -errno