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drm/cma: add debugfs helpers

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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>
This commit is contained in:
Rob Clark 2012-12-10 10:46:43 -06:00
parent 21a245d2d6
commit 6f646095ec
4 changed files with 83 additions and 0 deletions
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53
drivers/gpu/drm/drm_fb_cma_helper.c
View File

@ -180,6 +180,59 @@ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
}
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,

21
drivers/gpu/drm/drm_gem_cma_helper.c
View File

@ -249,3 +249,24 @@ int drm_gem_cma_dumb_destroy(struct drm_file *file_priv,
return drm_gem_handle_delete(file_priv, handle);
}
EXPORT_SYMBOL_GPL(drm_gem_cma_dumb_destroy);
#ifdef CONFIG_DEBUG_FS
void drm_gem_cma_describe(struct drm_gem_cma_object *cma_obj, struct seq_file *m)
{
struct drm_gem_object *obj = &cma_obj->base;
struct drm_device *dev = obj->dev;
uint64_t off = 0;
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
if (obj->map_list.map)
off = (uint64_t)obj->map_list.hash.key;
seq_printf(m, "%2d (%2d) %08llx %08Zx %p %d",
obj->name, obj->refcount.refcount.counter,
off, cma_obj->paddr, cma_obj->vaddr, obj->size);
seq_printf(m, "\n");
}
EXPORT_SYMBOL_GPL(drm_gem_cma_describe);
#endif

5
include/drm/drm_fb_cma_helper.h
View File

@ -23,5 +23,10 @@ struct drm_framebuffer *drm_fb_cma_create(struct drm_device *dev,
struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
unsigned int plane);
#ifdef CONFIG_DEBUG_FS
void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m);
int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg);
#endif
#endif

4
include/drm/drm_gem_cma_helper.h
View File

@ -41,4 +41,8 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
extern const struct vm_operations_struct drm_gem_cma_vm_ops;
#ifdef CONFIG_DEBUG_FS
void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
#endif
#endif /* __DRM_GEM_CMA_HELPER_H__ */