drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.h

Source file repositories/reference/linux-study-clean/drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.h

File Facts

System
Linux kernel
Corpus path
drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.h
Extension
.h
Size
2732 bytes
Lines
119
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct extron_port {
	struct cec_splitter_port port;
	struct device *dev;
	struct cec_adapter *adap;
	struct video_device vdev;
	struct v4l2_ctrl_handler hdl;
	struct v4l2_ctrl *ctrl_rx_power_present;
	struct v4l2_ctrl *ctrl_tx_hotplug;
	struct v4l2_ctrl *ctrl_tx_edid_present;
	bool is_input;
	char direction;
	char name[26];
	unsigned char edid[MAX_EDID_BLOCKS * 128];
	unsigned char edid_tmp[MAX_EDID_BLOCKS * 128];
	unsigned int edid_blocks;
	bool read_edid;
	struct extron *extron;
	struct work_struct irq_work;
	struct completion cmd_done;
	const char *response;
	unsigned int cmd_error;
	struct cec_msg rx_msg[NUM_MSGS];
	unsigned int rx_msg_cur_idx, rx_msg_num;
	/* protect rx_msg_cur_idx and rx_msg_num */
	spinlock_t msg_lock;
	u32 tx_done_status;
	bool update_phys_addr;
	u16 phys_addr;
	bool cec_was_registered;
	bool disconnected;
	bool update_has_signal;
	bool has_signal;
	bool update_has_edid;
	bool has_edid;
	bool has_4kp30;
	bool has_4kp60;
	bool has_qy;
	bool has_qs;
	u8 est_i, est_ii;

	/* locks access to the video_device */
	struct mutex video_lock;
};

struct extron {
	struct cec_splitter splitter;
	struct device *dev;
	struct serio *serio;
	/* locks access to serio */
	struct mutex serio_lock;
	unsigned int num_ports;
	unsigned int num_in_ports;
	unsigned int num_out_ports;
	char unit_name[32];
	char unit_type[64];
	char unit_fw_version[32];
	char unit_cec_engine_version[32];
	struct extron_port *ports[MAX_PORTS];
	struct cec_splitter_port *splitter_ports[MAX_PORTS];
	struct v4l2_device v4l2_dev;
	bool hpd_never_low;
	struct task_struct *kthread_setup;
	struct delayed_work work_update_edid;

	/* serializes EDID reading */
	struct mutex edid_lock;
	unsigned int edid_bytes_read;
	struct extron_port *edid_port;
	struct completion edid_completion;
	bool edid_reading;
	bool is_ready;

	struct completion cmd_done;
	const char *response;
	unsigned int cmd_error;
	char data[DATA_SIZE];
	unsigned int len;
	char reply[DATA_SIZE];
	char buf[DATA_SIZE];
	unsigned int idx;
};

#endif

Annotation

Implementation Notes