[PATCH v6 2/5] drm: move debugfs functionality from drm_drv.c to drm_debugfs.c
Christian König
christian.koenig at amd.com
Mon Jun 30 11:41:59 UTC 2025
On 27.06.25 11:49, Sunil Khatri wrote:
> move the debugfs functions from drm_drv.c to drm_debugfs.c
>
> move this root node to the debugfs for easily handling
> of future requirements to add more information in the
> root directory and one of which is planned to have
> directories for each client in the root directory
> which is dri.
>
> Suggested-by: Christian König <christian.koenig at amd.com>
> Signed-off-by: Sunil Khatri <sunil.khatri at amd.com>
> ---
> drivers/gpu/drm/drm_debugfs.c | 33 +++++++++++++++++++++++++++------
> drivers/gpu/drm/drm_drv.c | 19 +++++--------------
> drivers/gpu/drm/drm_internal.h | 6 ++----
> include/drm/drm_drv.h | 19 +++++++++++++++++--
> 4 files changed, 51 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
> index 2d43bda82887..5807dd64d28a 100644
> --- a/drivers/gpu/drm/drm_debugfs.c
> +++ b/drivers/gpu/drm/drm_debugfs.c
> @@ -44,6 +44,9 @@
> #include "drm_crtc_internal.h"
> #include "drm_internal.h"
>
> +static struct dentry *accel_debugfs_root;
> +static struct dentry *drm_debugfs_root;
> +
> /***************************************************
> * Initialization, etc.
> **************************************************/
> @@ -286,16 +289,35 @@ int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
> }
> EXPORT_SYMBOL(drm_debugfs_remove_files);
>
> +void drm_debugfs_init_root(void)
> +{
> + drm_debugfs_root = debugfs_create_dir("dri", NULL);
> + accel_debugfs_root = debugfs_create_dir("accel", NULL);
> +}
> +
> +void drm_debugfs_remove_root(void)
> +{
> + debugfs_remove(drm_debugfs_root);
> +}
> +
> +void drm_debugfs_remove_accel_root(void)
> +{
> + debugfs_remove(accel_debugfs_root);
> +}
Those two can be removed together as well I think, apart from that the patch looks good to me.
Regards,
Christian.
> +
> +
> /**
> * drm_debugfs_dev_init - create debugfs directory for the device
> * @dev: the device which we want to create the directory for
> - * @root: the parent directory depending on the device type
> *
> * Creates the debugfs directory for the device under the given root directory.
> */
> -void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
> +void drm_debugfs_dev_init(struct drm_device *dev)
> {
> - dev->debugfs_root = debugfs_create_dir(dev->unique, root);
> + if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL))
> + dev->debugfs_root = debugfs_create_dir(dev->unique, accel_debugfs_root);
> + else
> + dev->debugfs_root = debugfs_create_dir(dev->unique, drm_debugfs_root);
> }
>
> /**
> @@ -322,14 +344,13 @@ void drm_debugfs_dev_register(struct drm_device *dev)
> drm_atomic_debugfs_init(dev);
> }
>
> -int drm_debugfs_register(struct drm_minor *minor, int minor_id,
> - struct dentry *root)
> +int drm_debugfs_register(struct drm_minor *minor, int minor_id)
> {
> struct drm_device *dev = minor->dev;
> char name[64];
>
> sprintf(name, "%d", minor_id);
> - minor->debugfs_symlink = debugfs_create_symlink(name, root,
> + minor->debugfs_symlink = debugfs_create_symlink(name, drm_debugfs_root,
> dev->unique);
>
> /* TODO: Only for compatibility with drivers */
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 5d57b622f9aa..68f50d915153 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -69,9 +69,6 @@ DEFINE_XARRAY_ALLOC(drm_minors_xa);
> */
> static bool drm_core_init_complete;
>
> -static struct dentry *drm_debugfs_root;
> -static struct dentry *accel_debugfs_root;
> -
> DEFINE_STATIC_SRCU(drm_unplug_srcu);
>
> /*
> @@ -184,8 +181,7 @@ static int drm_minor_register(struct drm_device *dev, enum drm_minor_type type)
> return 0;
>
> if (minor->type != DRM_MINOR_ACCEL) {
> - ret = drm_debugfs_register(minor, minor->index,
> - drm_debugfs_root);
> + ret = drm_debugfs_register(minor, minor->index);
> if (ret) {
> DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
> goto err_debugfs;
> @@ -752,10 +748,7 @@ static int drm_dev_init(struct drm_device *dev,
> goto err;
> }
>
> - if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL))
> - drm_debugfs_dev_init(dev, accel_debugfs_root);
> - else
> - drm_debugfs_dev_init(dev, drm_debugfs_root);
> + drm_debugfs_dev_init(dev);
>
> return 0;
>
> @@ -1167,10 +1160,10 @@ static void drm_core_exit(void)
> {
> drm_privacy_screen_lookup_exit();
> drm_panic_exit();
> - debugfs_remove(accel_debugfs_root);
> + drm_debugfs_remove_accel_root();
> accel_core_exit();
> unregister_chrdev(DRM_MAJOR, "drm");
> - debugfs_remove(drm_debugfs_root);
> + drm_debugfs_remove_root();
> drm_sysfs_destroy();
> WARN_ON(!xa_empty(&drm_minors_xa));
> drm_connector_ida_destroy();
> @@ -1189,14 +1182,12 @@ static int __init drm_core_init(void)
> goto error;
> }
>
> - drm_debugfs_root = debugfs_create_dir("dri", NULL);
> + drm_debugfs_init_root();
>
> ret = register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops);
> if (ret < 0)
> goto error;
>
> - accel_debugfs_root = debugfs_create_dir("accel", NULL);
> -
> ret = accel_core_init();
> if (ret < 0)
> goto error;
> diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
> index b2b6a8e49dda..d2d8e72f32d9 100644
> --- a/drivers/gpu/drm/drm_internal.h
> +++ b/drivers/gpu/drm/drm_internal.h
> @@ -186,8 +186,7 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
> #if defined(CONFIG_DEBUG_FS)
> void drm_debugfs_dev_fini(struct drm_device *dev);
> void drm_debugfs_dev_register(struct drm_device *dev);
> -int drm_debugfs_register(struct drm_minor *minor, int minor_id,
> - struct dentry *root);
> +int drm_debugfs_register(struct drm_minor *minor, int minor_id);
> void drm_debugfs_unregister(struct drm_minor *minor);
> void drm_debugfs_connector_add(struct drm_connector *connector);
> void drm_debugfs_connector_remove(struct drm_connector *connector);
> @@ -205,8 +204,7 @@ static inline void drm_debugfs_dev_register(struct drm_device *dev)
> {
> }
>
> -static inline int drm_debugfs_register(struct drm_minor *minor, int minor_id,
> - struct dentry *root)
> +static inline int drm_debugfs_register(struct drm_minor *minor, int minor_id)
> {
> return 0;
> }
> diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
> index a43d707b5f36..a02bf4885b79 100644
> --- a/include/drm/drm_drv.h
> +++ b/include/drm/drm_drv.h
> @@ -566,9 +566,24 @@ static inline bool drm_firmware_drivers_only(void)
> }
>
> #if defined(CONFIG_DEBUG_FS)
> -void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root);
> +void drm_debugfs_dev_init(struct drm_device *dev);
> +void drm_debugfs_init_root(void);
> +void drm_debugfs_remove_root(void);
> +void drm_debugfs_remove_accel_root(void);
> #else
> -static inline void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
> +static inline void drm_debugfs_dev_init(struct drm_device *dev)
> +{
> +}
> +
> +static inline void drm_debugfs_init_root(void)
> +{
> +}
> +
> +static inline void drm_debugfs_remove_root(void)
> +{
> +}
> +
> +static inline void drm_debugfs_remove_accel_root(void)
> {
> }
> #endif
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