diff options
| -rw-r--r-- | include/media/v4l2-subdev.h | 166 |
1 files changed, 83 insertions, 83 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 8b08f6640dee..61024a74ce38 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1311,89 +1311,6 @@ int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name, */ void v4l2_subdev_cleanup(struct v4l2_subdev *sd); -/** - * v4l2_subdev_lock_state() - Locks the subdev state - * @state: The subdevice state - * - * Locks the given subdev state. - * - * The state must be unlocked with v4l2_subdev_unlock_state() after use. - */ -static inline void v4l2_subdev_lock_state(struct v4l2_subdev_state *state) -{ - mutex_lock(state->lock); -} - -/** - * v4l2_subdev_unlock_state() - Unlocks the subdev state - * @state: The subdevice state - * - * Unlocks the given subdev state. - */ -static inline void v4l2_subdev_unlock_state(struct v4l2_subdev_state *state) -{ - mutex_unlock(state->lock); -} - -/** - * v4l2_subdev_get_unlocked_active_state() - Checks that the active subdev state - * is unlocked and returns it - * @sd: The subdevice - * - * Returns the active state for the subdevice, or NULL if the subdev does not - * support active state. If the state is not NULL, calls - * lockdep_assert_not_held() to issue a warning if the state is locked. - * - * This function is to be used e.g. when getting the active state for the sole - * purpose of passing it forward, without accessing the state fields. - */ -static inline struct v4l2_subdev_state * -v4l2_subdev_get_unlocked_active_state(struct v4l2_subdev *sd) -{ - if (sd->active_state) - lockdep_assert_not_held(sd->active_state->lock); - return sd->active_state; -} - -/** - * v4l2_subdev_get_locked_active_state() - Checks that the active subdev state - * is locked and returns it - * - * @sd: The subdevice - * - * Returns the active state for the subdevice, or NULL if the subdev does not - * support active state. If the state is not NULL, calls lockdep_assert_held() - * to issue a warning if the state is not locked. - * - * This function is to be used when the caller knows that the active state is - * already locked. - */ -static inline struct v4l2_subdev_state * -v4l2_subdev_get_locked_active_state(struct v4l2_subdev *sd) -{ - if (sd->active_state) - lockdep_assert_held(sd->active_state->lock); - return sd->active_state; -} - -/** - * v4l2_subdev_lock_and_get_active_state() - Locks and returns the active subdev - * state for the subdevice - * @sd: The subdevice - * - * Returns the locked active state for the subdevice, or NULL if the subdev - * does not support active state. - * - * The state must be unlocked with v4l2_subdev_unlock_state() after use. - */ -static inline struct v4l2_subdev_state * -v4l2_subdev_lock_and_get_active_state(struct v4l2_subdev *sd) -{ - if (sd->active_state) - v4l2_subdev_lock_state(sd->active_state); - return sd->active_state; -} - /* * A macro to generate the macro or function name for sub-devices state access * wrapper macros below. @@ -1739,6 +1656,89 @@ int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable); #endif /* CONFIG_MEDIA_CONTROLLER */ /** + * v4l2_subdev_lock_state() - Locks the subdev state + * @state: The subdevice state + * + * Locks the given subdev state. + * + * The state must be unlocked with v4l2_subdev_unlock_state() after use. + */ +static inline void v4l2_subdev_lock_state(struct v4l2_subdev_state *state) +{ + mutex_lock(state->lock); +} + +/** + * v4l2_subdev_unlock_state() - Unlocks the subdev state + * @state: The subdevice state + * + * Unlocks the given subdev state. + */ +static inline void v4l2_subdev_unlock_state(struct v4l2_subdev_state *state) +{ + mutex_unlock(state->lock); +} + +/** + * v4l2_subdev_get_unlocked_active_state() - Checks that the active subdev state + * is unlocked and returns it + * @sd: The subdevice + * + * Returns the active state for the subdevice, or NULL if the subdev does not + * support active state. If the state is not NULL, calls + * lockdep_assert_not_held() to issue a warning if the state is locked. + * + * This function is to be used e.g. when getting the active state for the sole + * purpose of passing it forward, without accessing the state fields. + */ +static inline struct v4l2_subdev_state * +v4l2_subdev_get_unlocked_active_state(struct v4l2_subdev *sd) +{ + if (sd->active_state) + lockdep_assert_not_held(sd->active_state->lock); + return sd->active_state; +} + +/** + * v4l2_subdev_get_locked_active_state() - Checks that the active subdev state + * is locked and returns it + * + * @sd: The subdevice + * + * Returns the active state for the subdevice, or NULL if the subdev does not + * support active state. If the state is not NULL, calls lockdep_assert_held() + * to issue a warning if the state is not locked. + * + * This function is to be used when the caller knows that the active state is + * already locked. + */ +static inline struct v4l2_subdev_state * +v4l2_subdev_get_locked_active_state(struct v4l2_subdev *sd) +{ + if (sd->active_state) + lockdep_assert_held(sd->active_state->lock); + return sd->active_state; +} + +/** + * v4l2_subdev_lock_and_get_active_state() - Locks and returns the active subdev + * state for the subdevice + * @sd: The subdevice + * + * Returns the locked active state for the subdevice, or NULL if the subdev + * does not support active state. + * + * The state must be unlocked with v4l2_subdev_unlock_state() after use. + */ +static inline struct v4l2_subdev_state * +v4l2_subdev_lock_and_get_active_state(struct v4l2_subdev *sd) +{ + if (sd->active_state) + v4l2_subdev_lock_state(sd->active_state); + return sd->active_state; +} + +/** * v4l2_subdev_init - initializes the sub-device struct * * @sd: pointer to the &struct v4l2_subdev to be initialized |