This will cause drm_atomic_helper_page_flip and drm_mode_atomic_ioctl to fail with -EINVAL if a event is requested on a inactive crtc.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com --- diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index d719ce0b10a0..679577e8e02d 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -476,6 +476,12 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc, return -EINVAL; }
+ if (!state->active && state->event) { + DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event and not active\n", + crtc->base.id); + return -EINVAL; + } + /* The state->enable vs. state->mode_blob checks can be WARN_ON, * as this is a kernel-internal detail that userspace should never * be able to trigger. */