drm_modeset_lock_crtc — lock crtc with hidden acquire ctx for a plane update
void drm_modeset_lock_crtc ( | struct drm_crtc * crtc, |
struct drm_plane * plane); |
This function locks the given crtc and plane (which should be either the primary or cursor plane) using a hidden acquire context. This is necessary so that drivers internally using the atomic interfaces can grab further locks with the lock acquire context.
Note that plane can be NULL, e.g. when the cursor support hasn't yet been
converted to universal planes yet.