drm_privacy_screen_consumer.h

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/* SPDX-License-Identifier: MIT */
/*
 * Copyright (C) 2020 Red Hat, Inc.
 *
 * Authors:
 * Hans de Goede <hdegoede@redhat.com>
 */
 
#ifndef __DRM_PRIVACY_SCREEN_CONSUMER_H__
#define __DRM_PRIVACY_SCREEN_CONSUMER_H__
 
#include <linux/device.h>
#include <drm/drm_connector.h>
 
struct drm_privacy_screen;
 
#if IS_ENABLED(CONFIG_DRM_PRIVACY_SCREEN)
struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
                          const char *con_id);
void drm_privacy_screen_put(struct drm_privacy_screen *priv);
 
int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
                    enum drm_privacy_screen_status sw_state);
void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
                  enum drm_privacy_screen_status *sw_state_ret,
                  enum drm_privacy_screen_status *hw_state_ret);
 
int drm_privacy_screen_register_notifier(struct drm_privacy_screen *priv,
                     struct notifier_block *nb);
int drm_privacy_screen_unregister_notifier(struct drm_privacy_screen *priv,
                       struct notifier_block *nb);
#else
static inline struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
                                const char *con_id)
{
    return ERR_PTR(-ENODEV);
}
static inline void drm_privacy_screen_put(struct drm_privacy_screen *priv)
{
}
static inline int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
                          enum drm_privacy_screen_status sw_state)
{
    return -ENODEV;
}
static inline void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
                        enum drm_privacy_screen_status *sw_state_ret,
                        enum drm_privacy_screen_status *hw_state_ret)
{
    *sw_state_ret = PRIVACY_SCREEN_DISABLED;
    *hw_state_ret = PRIVACY_SCREEN_DISABLED;
}
static inline int drm_privacy_screen_register_notifier(struct drm_privacy_screen *priv,
                               struct notifier_block *nb)
{
    return -ENODEV;
}
static inline int drm_privacy_screen_unregister_notifier(struct drm_privacy_screen *priv,
                             struct notifier_block *nb)
{
    return -ENODEV;
}
#endif
 
#endif