drm/client: Make client support optional

Only build client code if DRM_CLIENT has been selected. Automatially
do so if one of the default clients has been enabled. If client support
has been disabled, the helpers for client-related events are empty and
the regular client functions are not present.

Amdgpu has an internal DRM client, so it has to select DRM_CLIENT by
itself unconditionally.

v3:
- provide empty drm_client_debugfs_init() if DRM_CLIENT=n (kernel
  test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Xinhui Pan <Xinhui.Pan@amd.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241014085740.582287-12-tzimmermann@suse.de

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 1705bfc90b1e..b2b6a8e49dda 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -48,6 +48,14 @@ struct drm_prime_file_private;
 struct drm_printer;
 struct drm_vblank_crtc;
 
+/* drm_client_event.c */
+#if defined(CONFIG_DRM_CLIENT)
+void drm_client_debugfs_init(struct drm_device *dev);
+#else
+static inline void drm_client_debugfs_init(struct drm_device *dev)
+{ }
+#endif
+
 /* drm_file.c */
 extern struct mutex drm_global_mutex;
 bool drm_dev_needs_global_mutex(struct drm_device *dev);