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Commit e450fcc6 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: Add list of framebuffers to debugfs 



This list is most useful to inspect whether framebuffer reference
counting works as expected. The code is loosely based on the i915
implementation.

Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
parent 84ff6b27

drivers/gpu/drm/tegra/drm.c

+44 −0
Original line number Diff line number Diff line
@@ -143,6 +143,45 @@ static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file) 
		tegra_dc_cancel_page_flip(crtc, file);

}



#ifdef CONFIG_DEBUG_FS

static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)

{

	struct drm_info_node *node = (struct drm_info_node *)s->private;

	struct drm_device *drm = node->minor->dev;

	struct drm_framebuffer *fb;



	mutex_lock(&drm->mode_config.fb_lock);



	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {

		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));

	}



	mutex_unlock(&drm->mode_config.fb_lock);



	return 0;

}



static struct drm_info_list tegra_debugfs_list[] = {

	{ "framebuffers", tegra_debugfs_framebuffers, 0 },

};



static int tegra_debugfs_init(struct drm_minor *minor)

{

	return drm_debugfs_create_files(tegra_debugfs_list,

					ARRAY_SIZE(tegra_debugfs_list),

					minor->debugfs_root, minor);

}



static void tegra_debugfs_cleanup(struct drm_minor *minor)

{

	drm_debugfs_remove_files(tegra_debugfs_list,

				 ARRAY_SIZE(tegra_debugfs_list), minor);

}

#endif



struct drm_driver tegra_drm_driver = {

	.driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,

	.load = tegra_drm_load,
@@ -155,6 +194,11 @@ struct drm_driver tegra_drm_driver = { 
	.enable_vblank = tegra_drm_enable_vblank,

	.disable_vblank = tegra_drm_disable_vblank,



#if defined(CONFIG_DEBUG_FS)

	.debugfs_init = tegra_debugfs_init,

	.debugfs_cleanup = tegra_debugfs_cleanup,

#endif



	.gem_free_object = drm_gem_cma_free_object,

	.gem_vm_ops = &drm_gem_cma_vm_ops,

	.dumb_create = drm_gem_cma_dumb_create,