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drm/mode: introduce wrapper to read framebuffer refcount. 

Avoids drivers knowing where the kref is stored.

[airlied: add kerneldoc]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2016-04-15 15:10:35 +10:00
parent 19ab3f8bb4
commit 747a598ffa
5 changed files with 16 additions and 5 deletions
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2
drivers/gpu/drm/drm_crtc.c
View File

@ -612,7 +612,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
* in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
* in this manner.
*/
if (atomic_read(&fb->refcount.refcount) > 1) {
if (drm_framebuffer_read_refcount(fb) > 1) {
drm_modeset_lock_all(dev);
/* remove from any CRTC */
drm_for_each_crtc(crtc, dev) {

4
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1917,7 +1917,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
fbdev_fb->base.depth,
fbdev_fb->base.bits_per_pixel,
fbdev_fb->base.modifier[0],
atomic_read(&fbdev_fb->base.refcount.refcount));
drm_framebuffer_read_refcount(&fbdev_fb->base));
describe_obj(m, fbdev_fb->obj);
seq_putc(m, '\n');
}
@ -1935,7 +1935,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
fb->base.depth,
fb->base.bits_per_pixel,
fb->base.modifier[0],
atomic_read(&fb->base.refcount.refcount));
drm_framebuffer_read_refcount(&fb->base));
describe_obj(m, fb->obj);
seq_putc(m, '\n');
}

2
drivers/gpu/drm/msm/msm_fb.c
View File

@ -77,7 +77,7 @@ void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
fb->width, fb->height, (char *)&fb->pixel_format,
fb->refcount.refcount.counter, fb->base.id);
drm_framebuffer_read_refcount(fb), fb->base.id);
for (i = 0; i < n; i++) {
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",

2
drivers/gpu/drm/tegra/drm.c
View File

@ -878,7 +878,7 @@ static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
fb->base.id, fb->width, fb->height, fb->depth,
fb->bits_per_pixel,
atomic_read(&fb->refcount.refcount));
drm_framebuffer_read_refcount(fb));
}
mutex_unlock(&drm->mode_config.fb_lock);

11
include/drm/drm_crtc.h
View File

@ -2605,6 +2605,17 @@ static inline uint32_t drm_color_lut_extract(uint32_t user_input,
return clamp_val(val, 0, max);
}
/**
* drm_framebuffer_read_refcount - read the framebuffer reference count.
* @fb: framebuffer
*
* This functions returns the framebuffer's reference count.
*/
static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
{
return atomic_read(&fb->refcount.refcount);
}
/* Plane list iterator for legacy (overlay only) planes. */
#define drm_for_each_legacy_plane(plane, dev) \
list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \