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>

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 4499b12..158bdca 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -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) {

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 644e80b..8593394 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -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');
        }

diff --git a/drivers/gpu/drm/msm/msm_fb.c b/drivers/gpu/drm/msm/msm_fb.c
index a474d6c..17e0c9e 100644 (file)
--- a/drivers/gpu/drm/msm/msm_fb.c
+++ b/drivers/gpu/drm/msm/msm_fb.c
@@ -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: ",

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 8e6b18c..2be88eb 100644 (file)
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -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);

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 6f43f94..1c99ee0 100644 (file)
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -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) \