diff options
| author | Dave Airlie <airlied@redhat.com> | 2016-11-07 09:37:09 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2016-11-07 09:37:09 +1000 |
| commit | 7b624ad8fea1be7ff4c22643e212191aa6a2a3c2 (patch) | |
| tree | 41d0357d3259868cd85521c3fb9578cd2fc13831 /include/drm | |
| parent | dc345c46774bc150ab852d2c74ee6542de438d46 (diff) | |
| parent | bc33b0ca11e3df467777a4fa7639ba488c9d4911 (diff) | |
Backmerge tag 'v4.9-rc4' into drm-next
Linux 4.9-rc4
This is needed for nouveau development.
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_plane.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index c5e8a0df1623..0bed92c5dbd8 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -47,8 +47,14 @@ struct drm_crtc; * @src_h: height of visible portion of plane (in 16.16) * @rotation: rotation of the plane * @zpos: priority of the given plane on crtc (optional) + * Note that multiple active planes on the same crtc can have an identical + * zpos value. The rule to solving the conflict is to compare the plane + * object IDs; the plane with a higher ID must be stacked on top of a + * plane with a lower ID. * @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1 - * where N is the number of active planes for given crtc + * where N is the number of active planes for given crtc. Note that + * the driver must call drm_atomic_normalize_zpos() to update this before + * it can be trusted. * @src: clipped source coordinates of the plane (in 16.16) * @dst: clipped destination coordinates of the plane * @visible: visibility of the plane |