drm: Add CrtcGetSequence and CrtcQueueSequence IOCTLs [v2]

These provide a crtc-id based interface to get the current sequence
(frame) number and to queue an event to be delivered at a specific sequence.

v2: Remove FIRST_PIXEL_OUT flag. This has been removed from the
    proposed kernel API

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/xf86drmMode.c b/xf86drmMode.c
index eddad8c4..15957ffc 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -889,6 +889,7 @@ int drmHandleEvent(int fd, drmEventContextPtr evctx)
         int len, i;
         struct drm_event *e;
         struct drm_event_vblank *vblank;
+        struct drm_event_crtc_sequence *seq;
         void *user_data;
 
         /* The DRM read semantics guarantees that we always get only
@@ -933,6 +934,14 @@ int drmHandleEvent(int fd, drmEventContextPtr evctx)
                                                          vblank->tv_usec,
                                                          user_data);
                         break;
+                case DRM_EVENT_CRTC_SEQUENCE:
+                        seq = (struct drm_event_crtc_sequence *) e;
+                        if (evctx->version >= 4 && evctx->sequence_handler)
+                                evctx->sequence_handler(fd,
+                                                        seq->sequence,
+                                                        seq->time_ns,
+                                                        seq->user_data);
+                        break;
                 default:
                         break;
                 }