diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-11-25 15:32:30 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-11-29 10:22:08 +0100 |
| commit | 389f78b361fcdc52a9dbb5382c3922d80b52ed9f (patch) | |
| tree | b0d3804f2c02c83be798b028be5aec0a48d8ed59 | |
| parent | b2383fa3592061cda53b1650bf538b1d82add816 (diff) | |
| download | linux-389f78b361fcdc52a9dbb5382c3922d80b52ed9f.tar.bz2 | |
drm: Introduce drm_framebuffer_assign()
In a couple of places currently, and with the intent to add more, we
update a pointer to a framebuffer to hold a new fb reference (evicting
the old).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161125153231.13255-2-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 8 | ||||
| -rw-r--r-- | include/drm/drm_framebuffer.h | 18 |
2 files changed, 20 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 89737e42fa83..19d7bcb88217 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1246,18 +1246,14 @@ void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, struct drm_framebuffer *fb) { - if (plane_state->fb) - drm_framebuffer_unreference(plane_state->fb); - if (fb) - drm_framebuffer_reference(fb); - plane_state->fb = fb; - if (fb) DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n", fb->base.id, plane_state); else DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n", plane_state); + + drm_framebuffer_assign(&plane_state->fb, fb); } EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); diff --git a/include/drm/drm_framebuffer.h b/include/drm/drm_framebuffer.h index b3141a0e609b..1ddfa2928802 100644 --- a/include/drm/drm_framebuffer.h +++ b/include/drm/drm_framebuffer.h @@ -251,6 +251,24 @@ static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb) } /** + * drm_framebuffer_assign - store a reference to the fb + * @p: location to store framebuffer + * @fb: new framebuffer (maybe NULL) + * + * This functions sets the location to store a reference to the framebuffer, + * unreferencing the framebuffer that was previously stored in that location. + */ +static inline void drm_framebuffer_assign(struct drm_framebuffer **p, + struct drm_framebuffer *fb) +{ + if (fb) + drm_framebuffer_reference(fb); + if (*p) + drm_framebuffer_unreference(*p); + *p = fb; +} + +/* * drm_for_each_fb - iterate over all framebuffers * @fb: the loop cursor * @dev: the DRM device |