diff options
| author | Shirish S <Shirish.S@amd.com> | 2018-03-07 08:40:03 +0530 |
|---|---|---|
| committer | Harry Wentland <harry.wentland@amd.com> | 2018-03-07 15:34:59 -0500 |
| commit | 55de2923847c3318459758931ff175996facce69 (patch) | |
| tree | 48862ec0a00bfea6d782c779ffe65ffc3baeac98 /include/drm/drm_atomic.h | |
| parent | 100bc0d9963b506d4f1f0936c1d8ed17d214ef30 (diff) | |
| download | linux-55de2923847c3318459758931ff175996facce69.tar.bz2 | |
drm/atomic: Add new reverse iterator over all plane state (V2)
Add reverse iterator for_each_oldnew_plane_in_state_reverse to
compliment the for_each_oldnew_plane_in_state way or reading plane
states.
The plane states are required to be read in reverse order for
amd drivers, cause the z order convention followed in linux is
opposite to how the planes are supposed to be presented to DC
engine, which is in common to both windows and linux.
V2: fix compile time errors due to -Werror flag.
Signed-off-by: Shirish S <shirish.s@amd.com>
Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1520392203-6885-1-git-send-email-shirish.s@amd.com
Diffstat (limited to 'include/drm/drm_atomic.h')
| -rw-r--r-- | include/drm/drm_atomic.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index cf13842a6dbd..3fe8dde320e5 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -754,6 +754,28 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p); (new_plane_state) = (__state)->planes[__i].new_state, 1)) /** + * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic + * update in reverse order + * @__state: &struct drm_atomic_state pointer + * @plane: &struct drm_plane iteration cursor + * @old_plane_state: &struct drm_plane_state iteration cursor for the old state + * @new_plane_state: &struct drm_plane_state iteration cursor for the new state + * @__i: int iteration cursor, for macro-internal use + * + * This iterates over all planes in an atomic update in reverse order, + * tracking both old and new state. This is useful in places where the + * state delta needs to be considered, for example in atomic check functions. + */ +#define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \ + for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \ + (__i) >= 0; \ + (__i)--) \ + for_each_if ((__state)->planes[__i].ptr && \ + ((plane) = (__state)->planes[__i].ptr, \ + (old_plane_state) = (__state)->planes[__i].old_state,\ + (new_plane_state) = (__state)->planes[__i].new_state, 1)) + +/** * for_each_old_plane_in_state - iterate over all planes in an atomic update * @__state: &struct drm_atomic_state pointer * @plane: &struct drm_plane iteration cursor |