drm/cma: add debugfs helpers
Add helper to display fb's which can be used directly in drm_info_list:
static struct drm_info_list foo_debugfs_list[] = {
...
{ "fb", drm_fb_cma_debugfs_show, 0 },
};
to display information about CMA fb objects, as well as a
drm_gem_cma_describe() which can be used if the driver bothers to keep
a list of CMA GEM objects.
Signed-off-by: Rob Clark <robdclark@gmail.com>
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index ef68e34..8044c5e 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -180,6 +180,59 @@
}
EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj);
+#ifdef CONFIG_DEBUG_FS
+/**
+ * drm_fb_cma_describe() - Helper to dump information about a single
+ * CMA framebuffer object
+ */
+void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m)
+{
+ struct drm_fb_cma *fb_cma = to_fb_cma(fb);
+ int i, n = drm_format_num_planes(fb->pixel_format);
+
+ seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
+ (char *)&fb->pixel_format);
+
+ for (i = 0; i < n; i++) {
+ seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
+ i, fb->offsets[i], fb->pitches[i]);
+ drm_gem_cma_describe(fb_cma->obj[i], m);
+ }
+}
+EXPORT_SYMBOL_GPL(drm_fb_cma_describe);
+
+/**
+ * drm_fb_cma_debugfs_show() - Helper to list CMA framebuffer objects
+ * in debugfs.
+ */
+int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct drm_framebuffer *fb;
+ int ret;
+
+ ret = mutex_lock_interruptible(&dev->mode_config.mutex);
+ if (ret)
+ return ret;
+
+ ret = mutex_lock_interruptible(&dev->struct_mutex);
+ if (ret) {
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+ }
+
+ list_for_each_entry(fb, &dev->mode_config.fb_list, head)
+ drm_fb_cma_describe(fb, m);
+
+ mutex_unlock(&dev->struct_mutex);
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(drm_fb_cma_debugfs_show);
+#endif
+
static struct fb_ops drm_fbdev_cma_ops = {
.owner = THIS_MODULE,
.fb_fillrect = sys_fillrect,