include/drm/drm_privacy_screen_consumer.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright (C) 2020 Red Hat, Inc.
   4  *
   5  * Authors:
   6  * Hans de Goede <hdegoede@redhat.com>
   7  */
   8
   9 #ifndef __DRM_PRIVACY_SCREEN_CONSUMER_H__
  10 #define __DRM_PRIVACY_SCREEN_CONSUMER_H__
  11
  12 #include <linux/device.h>
  13 #include <drm/drm_connector.h>
  14
  15 struct drm_privacy_screen;
  16
  17 #if IS_ENABLED(CONFIG_DRM_PRIVACY_SCREEN)
  18 struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
  19                                                   const char *con_id);
  20 void drm_privacy_screen_put(struct drm_privacy_screen *priv);
  21
  22 int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
  23                                     enum drm_privacy_screen_status sw_state);
  24 void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
  25                                   enum drm_privacy_screen_status *sw_state_ret,
  26                                   enum drm_privacy_screen_status *hw_state_ret);
  27
  28 int drm_privacy_screen_register_notifier(struct drm_privacy_screen *priv,
  29                                          struct notifier_block *nb);
  30 int drm_privacy_screen_unregister_notifier(struct drm_privacy_screen *priv,
  31                                            struct notifier_block *nb);
  32 #else
  33 static inline struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
  34                                                                 const char *con_id)
  35 {
  36         return ERR_PTR(-ENODEV);
  37 }
  38 static inline void drm_privacy_screen_put(struct drm_privacy_screen *priv)
  39 {
  40 }
  41 static inline int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
  42                                                   enum drm_privacy_screen_status sw_state)
  43 {
  44         return -ENODEV;
  45 }
  46 static inline void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
  47                                                 enum drm_privacy_screen_status *sw_state_ret,
  48                                                 enum drm_privacy_screen_status *hw_state_ret)
  49 {
  50         *sw_state_ret = PRIVACY_SCREEN_DISABLED;
  51         *hw_state_ret = PRIVACY_SCREEN_DISABLED;
  52 }
  53 static inline int drm_privacy_screen_register_notifier(struct drm_privacy_screen *priv,
  54                                                        struct notifier_block *nb)
  55 {
  56         return -ENODEV;
  57 }
  58 static inline int drm_privacy_screen_unregister_notifier(struct drm_privacy_screen *priv,
  59                                                          struct notifier_block *nb)
  60 {
  61         return -ENODEV;
  62 }
  63 #endif
  64
  65 #endif