drm/vblank: Pass crtc_id to page_flip_ioctl.

We added crtc_id to the atomic ioctl, but forgot to add it for vblank
and page flip events. Commit bd386e5 ("drm: Reorganize
drm_pending_event to support future event types [v2]") added it to
the vblank event, but page flip event was still missing.

Correct this and add a test for making sure we always set crtc_id correctly.

Fixes: bd386e5 ("drm: Reorganize drm_pending_event to support future event types [v2]")
Fixes: 5db06a8 ("drm: Pass CRTC ID in userspace vblank events")
Cc: Daniel Stone <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Gustavo Padovan <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: [email protected]
Cc: <[email protected]> # v4.12+
Reviewed-by: Daniel Vetter <[email protected]> #irc
Testcase: igt/kms_vblank/crtc_id
Signed-off-by: Maarten Lankhorst <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: mlankhorst

drivers/gpu/drm/drm_plane.c

@@ -1030,6 +1030,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
 		e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
 		e->event.base.length = sizeof(e->event);
 		e->event.vbl.user_data = page_flip->user_data;
+		e->event.vbl.crtc_id = crtc->base.id;
 		ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
 		if (ret) {
 			kfree(e);