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>
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@ -180,6 +180,59 @@ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
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}
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EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj);
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#ifdef CONFIG_DEBUG_FS
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/**
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* drm_fb_cma_describe() - Helper to dump information about a single
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* CMA framebuffer object
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*/
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void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m)
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{
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struct drm_fb_cma *fb_cma = to_fb_cma(fb);
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int i, n = drm_format_num_planes(fb->pixel_format);
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seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
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(char *)&fb->pixel_format);
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for (i = 0; i < n; i++) {
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seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
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i, fb->offsets[i], fb->pitches[i]);
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drm_gem_cma_describe(fb_cma->obj[i], m);
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}
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}
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EXPORT_SYMBOL_GPL(drm_fb_cma_describe);
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/**
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* drm_fb_cma_debugfs_show() - Helper to list CMA framebuffer objects
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* in debugfs.
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*/
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int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg)
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{
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struct drm_info_node *node = (struct drm_info_node *) m->private;
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struct drm_device *dev = node->minor->dev;
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struct drm_framebuffer *fb;
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int ret;
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ret = mutex_lock_interruptible(&dev->mode_config.mutex);
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if (ret)
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return ret;
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ret = mutex_lock_interruptible(&dev->struct_mutex);
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if (ret) {
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mutex_unlock(&dev->mode_config.mutex);
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return ret;
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}
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list_for_each_entry(fb, &dev->mode_config.fb_list, head)
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drm_fb_cma_describe(fb, m);
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mutex_unlock(&dev->struct_mutex);
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mutex_unlock(&dev->mode_config.mutex);
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return 0;
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}
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EXPORT_SYMBOL_GPL(drm_fb_cma_debugfs_show);
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#endif
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static struct fb_ops drm_fbdev_cma_ops = {
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.owner = THIS_MODULE,
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.fb_fillrect = sys_fillrect,
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@ -249,3 +249,24 @@ int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
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return drm_gem_handle_delete(file_priv, handle);
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}
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EXPORT_SYMBOL_GPL(drm_gem_cma_dumb_destroy);
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#ifdef CONFIG_DEBUG_FS
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void drm_gem_cma_describe(struct drm_gem_cma_object *cma_obj, struct seq_file *m)
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{
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struct drm_gem_object *obj = &cma_obj->base;
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struct drm_device *dev = obj->dev;
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uint64_t off = 0;
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WARN_ON(!mutex_is_locked(&dev->struct_mutex));
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if (obj->map_list.map)
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off = (uint64_t)obj->map_list.hash.key;
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seq_printf(m, "%2d (%2d) %08llx %08Zx %p %d",
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obj->name, obj->refcount.refcount.counter,
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off, cma_obj->paddr, cma_obj->vaddr, obj->size);
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seq_printf(m, "\n");
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}
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EXPORT_SYMBOL_GPL(drm_gem_cma_describe);
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#endif
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@ -23,5 +23,10 @@ struct drm_framebuffer *drm_fb_cma_create(struct drm_device *dev,
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struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
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unsigned int plane);
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#ifdef CONFIG_DEBUG_FS
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void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m);
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int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg);
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#endif
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#endif
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@ -41,4 +41,8 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
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extern const struct vm_operations_struct drm_gem_cma_vm_ops;
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#ifdef CONFIG_DEBUG_FS
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void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
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#endif
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#endif /* __DRM_GEM_CMA_HELPER_H__ */
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