include/media/cec.h

Source file repositories/reference/linux-study-clean/include/media/cec.h

File Facts

System
Linux kernel
Corpus path
include/media/cec.h
Extension
.h
Size
18307 bytes
Lines
598
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cec_devnode {
	/* sysfs */
	struct device dev;
	struct cdev cdev;

	/* device info */
	int minor;
	/* serialize open/release and registration */
	struct mutex lock;
	bool registered;
	bool unregistered;
	/* protect access to fhs */
	struct mutex lock_fhs;
	struct list_head fhs;
};

struct cec_adapter;
struct cec_data;
struct cec_pin;
struct cec_notifier;

struct cec_data {
	struct list_head list;
	struct list_head xfer_list;
	struct cec_adapter *adap;
	struct cec_msg msg;
	u8 match_len;
	u8 match_reply[5];
	struct cec_fh *fh;
	struct delayed_work work;
	struct completion c;
	u8 attempts;
	bool blocking;
	bool completed;
};

struct cec_msg_entry {
	struct list_head	list;
	struct cec_msg		msg;
};

struct cec_event_entry {
	struct list_head	list;
	struct cec_event	ev;
};

#define CEC_NUM_CORE_EVENTS 2
#define CEC_NUM_EVENTS CEC_EVENT_PIN_5V_HIGH

struct cec_fh {
	struct list_head	list;
	struct list_head	xfer_list;
	struct cec_adapter	*adap;
	u8			mode_initiator;
	u8			mode_follower;

	/* Events */
	wait_queue_head_t	wait;
	struct mutex		lock;
	struct list_head	events[CEC_NUM_EVENTS]; /* queued events */
	u16			queued_events[CEC_NUM_EVENTS];
	unsigned int		total_queued_events;
	struct cec_event_entry	core_events[CEC_NUM_CORE_EVENTS];
	struct list_head	msgs; /* queued messages */
	unsigned int		queued_msgs;
};

#define CEC_SIGNAL_FREE_TIME_RETRY		3
#define CEC_SIGNAL_FREE_TIME_NEW_INITIATOR	5
#define CEC_SIGNAL_FREE_TIME_NEXT_XFER		7

/* The nominal data bit period is 2.4 ms */
#define CEC_FREE_TIME_TO_USEC(ft)		((ft) * 2400)

struct cec_adap_ops {
	/* Low-level callbacks, called with adap->lock held */
	int (*adap_enable)(struct cec_adapter *adap, bool enable);
	int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
	int (*adap_monitor_pin_enable)(struct cec_adapter *adap, bool enable);
	int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
	void (*adap_unconfigured)(struct cec_adapter *adap);
	int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
			     u32 signal_free_time, struct cec_msg *msg);
	void (*adap_nb_transmit_canceled)(struct cec_adapter *adap,
					  const struct cec_msg *msg);
	void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
	void (*adap_free)(struct cec_adapter *adap);

	/* Error injection callbacks, called without adap->lock held */
	int (*error_inj_show)(struct cec_adapter *adap, struct seq_file *sf);

Annotation

Implementation Notes