mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 16:14:13 +08:00
8a12b17055
Add support for privacy-screen consumers to register a notifier to be notified of external (e.g. done by the hw itself on a hotkey press) state changes. Changes in v2: - Drop WARN_ON(mutex_is_locked(&priv->lock)) check in drm_privacy_screen_call_notifier_chain() it may be locked by another thread, which would lead to a false-positive triggering of the check Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-5-hdegoede@redhat.com
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* 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
|