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: Thierry Reding thierry.reding@avionic-design.de --- drivers/gpu/drm/tegra/drm.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 97485af..181a370 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -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,