2 * V4L2 sub-device support header.
4 * Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #ifndef _V4L2_SUBDEV_H
18 #define _V4L2_SUBDEV_H
20 #include <linux/types.h>
21 #include <linux/v4l2-subdev.h>
22 #include <media/media-entity.h>
23 #include <media/v4l2-async.h>
24 #include <media/v4l2-common.h>
25 #include <media/v4l2-dev.h>
26 #include <media/v4l2-fh.h>
27 #include <media/v4l2-mediabus.h>
29 /* generic v4l2_device notify callback notification values */
30 #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32)
31 #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001
32 #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002
33 #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004
34 #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008
36 #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
37 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
39 #define V4L2_DEVICE_NOTIFY_EVENT _IOW('v', 2, struct v4l2_event)
42 struct v4l2_ctrl_handler
;
44 struct v4l2_event_subscription
;
47 struct v4l2_subdev_fh
;
49 struct v4l2_mbus_frame_desc
;
52 * struct v4l2_decode_vbi_line - used to decode_vbi_line
54 * @is_second_field: Set to 0 for the first (odd) field;
55 * set to 1 for the second (even) field.
56 * @p: Pointer to the sliced VBI data from the decoder. On exit, points to
57 * the start of the payload.
58 * @line: Line number of the sliced VBI data (1-23)
59 * @type: VBI service type (V4L2_SLICED_*). 0 if no service found
61 struct v4l2_decode_vbi_line
{
69 * Sub-devices are devices that are connected somehow to the main bridge
70 * device. These devices are usually audio/video muxers/encoders/decoders or
71 * sensors and webcam controllers.
73 * Usually these devices are controlled through an i2c bus, but other busses
76 * The v4l2_subdev struct provides a way of accessing these devices in a
77 * generic manner. Most operations that these sub-devices support fall in
78 * a few categories: core ops, audio ops, video ops and tuner ops.
80 * More categories can be added if needed, although this should remain a
81 * limited set (no more than approx. 8 categories).
83 * Each category has its own set of ops that subdev drivers can implement.
85 * A subdev driver can leave the pointer to the category ops NULL if
86 * it does not implement them (e.g. an audio subdev will generally not
87 * implement the video category ops). The exception is the core category:
88 * this must always be present.
90 * These ops are all used internally so it is no problem to change, remove
91 * or add ops or move ops from one to another category. Currently these
92 * ops are based on the original ioctls, but since ops are not limited to
93 * one argument there is room for improvement here once all i2c subdev
94 * drivers are converted to use these ops.
98 * Core ops: it is highly recommended to implement at least these ops:
104 * This provides basic debugging support.
106 * The ioctl ops is meant for generic ioctl-like commands. Depending on
107 * the use-case it might be better to use subdev-specific ops (currently
108 * not yet implemented) since ops provide proper type-checking.
111 /* Subdevice external IO pin configuration */
112 #define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */
113 #define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1)
114 #define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2)
115 #define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */
116 #define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */
119 * struct v4l2_subdev_io_pin_config - Subdevice external IO pin configuration
121 * @flags: bitmask with flags for this pin's config:
122 * %V4L2_SUBDEV_IO_PIN_DISABLE - disables a pin config,
123 * %V4L2_SUBDEV_IO_PIN_OUTPUT - if pin is an output,
124 * %V4L2_SUBDEV_IO_PIN_INPUT - if pin is an input,
125 * %V4L2_SUBDEV_IO_PIN_SET_VALUE - to set the output value via @value
126 * and %V4L2_SUBDEV_IO_PIN_ACTIVE_LOW - if active is 0.
127 * @pin: Chip external IO pin to configure
128 * @function: Internal signal pad/function to route to IO pin
129 * @value: Initial value for pin - e.g. GPIO output value
130 * @strength: Pin drive strength
132 struct v4l2_subdev_io_pin_config
{
141 * struct v4l2_subdev_core_ops - Define core ops callbacks for subdevs
143 * @log_status: callback for %VIDIOC_LOG_STATUS ioctl handler code.
145 * @s_io_pin_config: configure one or more chip I/O pins for chips that
146 * multiplex different internal signal pads out to IO pins. This function
147 * takes a pointer to an array of 'n' pin configuration entries, one for
148 * each pin being configured. This function could be called at times
149 * other than just subdevice initialization.
151 * @init: initialize the sensor registers to some sort of reasonable default
152 * values. Do not use for new drivers and should be removed in existing
155 * @load_fw: load firmware.
157 * @reset: generic reset command. The argument selects which subsystems to
158 * reset. Passing 0 will always reset the whole chip. Do not use for new
159 * drivers without discussing this first on the linux-media mailinglist.
160 * There should be no reason normally to reset a device.
162 * @s_gpio: set GPIO pins. Very simple right now, might need to be extended with
163 * a direction argument if needed.
165 * @ioctl: called at the end of ioctl() syscall handler at the V4L2 core.
166 * used to provide support for private ioctls used on the driver.
168 * @compat_ioctl32: called when a 32 bits application uses a 64 bits Kernel,
169 * in order to fix data passed from/to userspace.
171 * @g_register: callback for %VIDIOC_G_REGISTER ioctl handler code.
173 * @s_register: callback for %VIDIOC_G_REGISTER ioctl handler code.
175 * @s_power: puts subdevice in power saving mode (on == 0) or normal operation
178 * @interrupt_service_routine: Called by the bridge chip's interrupt service
179 * handler, when an interrupt status has be raised due to this subdev,
180 * so that this subdev can handle the details. It may schedule work to be
181 * performed later. It must not sleep. **Called from an IRQ context**.
183 * @subscribe_event: used by the drivers to request the control framework that
184 * for it to be warned when the value of a control changes.
186 * @unsubscribe_event: remove event subscription from the control framework.
188 struct v4l2_subdev_core_ops
{
189 int (*log_status
)(struct v4l2_subdev
*sd
);
190 int (*s_io_pin_config
)(struct v4l2_subdev
*sd
, size_t n
,
191 struct v4l2_subdev_io_pin_config
*pincfg
);
192 int (*init
)(struct v4l2_subdev
*sd
, u32 val
);
193 int (*load_fw
)(struct v4l2_subdev
*sd
);
194 int (*reset
)(struct v4l2_subdev
*sd
, u32 val
);
195 int (*s_gpio
)(struct v4l2_subdev
*sd
, u32 val
);
196 long (*ioctl
)(struct v4l2_subdev
*sd
, unsigned int cmd
, void *arg
);
198 long (*compat_ioctl32
)(struct v4l2_subdev
*sd
, unsigned int cmd
,
201 #ifdef CONFIG_VIDEO_ADV_DEBUG
202 int (*g_register
)(struct v4l2_subdev
*sd
, struct v4l2_dbg_register
*reg
);
203 int (*s_register
)(struct v4l2_subdev
*sd
, const struct v4l2_dbg_register
*reg
);
205 int (*s_power
)(struct v4l2_subdev
*sd
, int on
);
206 int (*interrupt_service_routine
)(struct v4l2_subdev
*sd
,
207 u32 status
, bool *handled
);
208 int (*subscribe_event
)(struct v4l2_subdev
*sd
, struct v4l2_fh
*fh
,
209 struct v4l2_event_subscription
*sub
);
210 int (*unsubscribe_event
)(struct v4l2_subdev
*sd
, struct v4l2_fh
*fh
,
211 struct v4l2_event_subscription
*sub
);
215 * struct v4l2_subdev_tuner_ops - Callbacks used when v4l device was opened
218 * @s_radio: callback for %VIDIOC_S_RADIO ioctl handler code.
220 * @s_frequency: callback for %VIDIOC_S_FREQUENCY ioctl handler code.
222 * @g_frequency: callback for %VIDIOC_G_FREQUENCY ioctl handler code.
223 * freq->type must be filled in. Normally done by video_ioctl2()
224 * or the bridge driver.
226 * @enum_freq_bands: callback for %VIDIOC_ENUM_FREQ_BANDS ioctl handler code.
228 * @g_tuner: callback for %VIDIOC_G_TUNER ioctl handler code.
230 * @s_tuner: callback for %VIDIOC_S_TUNER ioctl handler code. @vt->type must be
231 * filled in. Normally done by video_ioctl2 or the
234 * @g_modulator: callback for %VIDIOC_G_MODULATOR ioctl handler code.
236 * @s_modulator: callback for %VIDIOC_S_MODULATOR ioctl handler code.
238 * @s_type_addr: sets tuner type and its I2C addr.
240 * @s_config: sets tda9887 specific stuff, like port1, port2 and qss
242 struct v4l2_subdev_tuner_ops
{
243 int (*s_radio
)(struct v4l2_subdev
*sd
);
244 int (*s_frequency
)(struct v4l2_subdev
*sd
, const struct v4l2_frequency
*freq
);
245 int (*g_frequency
)(struct v4l2_subdev
*sd
, struct v4l2_frequency
*freq
);
246 int (*enum_freq_bands
)(struct v4l2_subdev
*sd
, struct v4l2_frequency_band
*band
);
247 int (*g_tuner
)(struct v4l2_subdev
*sd
, struct v4l2_tuner
*vt
);
248 int (*s_tuner
)(struct v4l2_subdev
*sd
, const struct v4l2_tuner
*vt
);
249 int (*g_modulator
)(struct v4l2_subdev
*sd
, struct v4l2_modulator
*vm
);
250 int (*s_modulator
)(struct v4l2_subdev
*sd
, const struct v4l2_modulator
*vm
);
251 int (*s_type_addr
)(struct v4l2_subdev
*sd
, struct tuner_setup
*type
);
252 int (*s_config
)(struct v4l2_subdev
*sd
, const struct v4l2_priv_tun_config
*config
);
256 * struct v4l2_subdev_audio_ops - Callbacks used for audio-related settings
258 * @s_clock_freq: set the frequency (in Hz) of the audio clock output.
259 * Used to slave an audio processor to the video decoder, ensuring that
260 * audio and video remain synchronized. Usual values for the frequency
261 * are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
262 * -EINVAL is returned.
264 * @s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
265 * way to select I2S clock used by driving digital audio streams at some
266 * board designs. Usual values for the frequency are 1024000 and 2048000.
267 * If the frequency is not supported, then %-EINVAL is returned.
269 * @s_routing: used to define the input and/or output pins of an audio chip,
270 * and any additional configuration data.
271 * Never attempt to use user-level input IDs (e.g. Composite, S-Video,
272 * Tuner) at this level. An i2c device shouldn't know about whether an
273 * input pin is connected to a Composite connector, become on another
274 * board or platform it might be connected to something else entirely.
275 * The calling driver is responsible for mapping a user-level input to
276 * the right pins on the i2c device.
278 * @s_stream: used to notify the audio code that stream will start or has
281 struct v4l2_subdev_audio_ops
{
282 int (*s_clock_freq
)(struct v4l2_subdev
*sd
, u32 freq
);
283 int (*s_i2s_clock_freq
)(struct v4l2_subdev
*sd
, u32 freq
);
284 int (*s_routing
)(struct v4l2_subdev
*sd
, u32 input
, u32 output
, u32 config
);
285 int (*s_stream
)(struct v4l2_subdev
*sd
, int enable
);
288 /* Indicates the @length field specifies maximum data length. */
289 #define V4L2_MBUS_FRAME_DESC_FL_LEN_MAX (1U << 0)
291 * Indicates that the format does not have line offsets, i.e. the
292 * receiver should use 1D DMA.
294 #define V4L2_MBUS_FRAME_DESC_FL_BLOB (1U << 1)
297 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure
299 * @flags: bitmask flags: %V4L2_MBUS_FRAME_DESC_FL_LEN_MAX and
300 * %V4L2_MBUS_FRAME_DESC_FL_BLOB.
301 * @pixelcode: media bus pixel code, valid if FRAME_DESC_FL_BLOB is not set
302 * @length: number of octets per frame, valid if V4L2_MBUS_FRAME_DESC_FL_BLOB
305 struct v4l2_mbus_frame_desc_entry
{
311 #define V4L2_FRAME_DESC_ENTRY_MAX 4
314 * struct v4l2_mbus_frame_desc - media bus data frame description
315 * @entry: frame descriptors array
316 * @num_entries: number of entries in @entry array
318 struct v4l2_mbus_frame_desc
{
319 struct v4l2_mbus_frame_desc_entry entry
[V4L2_FRAME_DESC_ENTRY_MAX
];
320 unsigned short num_entries
;
324 * struct v4l2_subdev_video_ops - Callbacks used when v4l device was opened
327 * @s_routing: see s_routing in audio_ops, except this version is for video
330 * @s_crystal_freq: sets the frequency of the crystal used to generate the
331 * clocks in Hz. An extra flags field allows device specific configuration
332 * regarding clock frequency dividers, etc. If not used, then set flags
333 * to 0. If the frequency is not supported, then -EINVAL is returned.
335 * @g_std: callback for %VIDIOC_G_STD ioctl handler code.
337 * @s_std: callback for %VIDIOC_S_STD ioctl handler code.
339 * @s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
340 * video input devices.
342 * @g_std_output: get current standard for video OUTPUT devices. This is ignored
343 * by video input devices.
345 * @querystd: callback for %VIDIOC_QUERYSTD ioctl handler code.
347 * @g_tvnorms: get &v4l2_std_id with all standards supported by the video
348 * CAPTURE device. This is ignored by video output devices.
350 * @g_tvnorms_output: get v4l2_std_id with all standards supported by the video
351 * OUTPUT device. This is ignored by video capture devices.
353 * @g_input_status: get input status. Same as the status field in the
354 * &struct &v4l2_input
356 * @s_stream: used to notify the driver that a video stream will start or has
359 * @g_pixelaspect: callback to return the pixelaspect ratio.
361 * @g_parm: callback for %VIDIOC_G_PARM ioctl handler code.
363 * @s_parm: callback for %VIDIOC_S_PARM ioctl handler code.
365 * @g_frame_interval: callback for %VIDIOC_G_FRAMEINTERVAL ioctl handler code.
367 * @s_frame_interval: callback for %VIDIOC_S_FRAMEINTERVAL ioctl handler code.
369 * @s_dv_timings: Set custom dv timings in the sub device. This is used
370 * when sub device is capable of setting detailed timing information
371 * in the hardware to generate/detect the video signal.
373 * @g_dv_timings: Get custom dv timings in the sub device.
375 * @query_dv_timings: callback for %VIDIOC_QUERY_DV_TIMINGS ioctl handler code.
377 * @g_mbus_config: get supported mediabus configurations
379 * @s_mbus_config: set a certain mediabus configuration. This operation is added
380 * for compatibility with soc-camera drivers and should not be used by new
383 * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
384 * can adjust @size to a lower value and must not write more data to the
385 * buffer starting at @data than the original value of @size.
387 struct v4l2_subdev_video_ops
{
388 int (*s_routing
)(struct v4l2_subdev
*sd
, u32 input
, u32 output
, u32 config
);
389 int (*s_crystal_freq
)(struct v4l2_subdev
*sd
, u32 freq
, u32 flags
);
390 int (*g_std
)(struct v4l2_subdev
*sd
, v4l2_std_id
*norm
);
391 int (*s_std
)(struct v4l2_subdev
*sd
, v4l2_std_id norm
);
392 int (*s_std_output
)(struct v4l2_subdev
*sd
, v4l2_std_id std
);
393 int (*g_std_output
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
394 int (*querystd
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
395 int (*g_tvnorms
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
396 int (*g_tvnorms_output
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
397 int (*g_input_status
)(struct v4l2_subdev
*sd
, u32
*status
);
398 int (*s_stream
)(struct v4l2_subdev
*sd
, int enable
);
399 int (*g_pixelaspect
)(struct v4l2_subdev
*sd
, struct v4l2_fract
*aspect
);
400 int (*g_parm
)(struct v4l2_subdev
*sd
, struct v4l2_streamparm
*param
);
401 int (*s_parm
)(struct v4l2_subdev
*sd
, struct v4l2_streamparm
*param
);
402 int (*g_frame_interval
)(struct v4l2_subdev
*sd
,
403 struct v4l2_subdev_frame_interval
*interval
);
404 int (*s_frame_interval
)(struct v4l2_subdev
*sd
,
405 struct v4l2_subdev_frame_interval
*interval
);
406 int (*s_dv_timings
)(struct v4l2_subdev
*sd
,
407 struct v4l2_dv_timings
*timings
);
408 int (*g_dv_timings
)(struct v4l2_subdev
*sd
,
409 struct v4l2_dv_timings
*timings
);
410 int (*query_dv_timings
)(struct v4l2_subdev
*sd
,
411 struct v4l2_dv_timings
*timings
);
412 int (*g_mbus_config
)(struct v4l2_subdev
*sd
,
413 struct v4l2_mbus_config
*cfg
);
414 int (*s_mbus_config
)(struct v4l2_subdev
*sd
,
415 const struct v4l2_mbus_config
*cfg
);
416 int (*s_rx_buffer
)(struct v4l2_subdev
*sd
, void *buf
,
421 * struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened
422 * in video mode via the vbi device node.
424 * @decode_vbi_line: video decoders that support sliced VBI need to implement
425 * this ioctl. Field p of the &struct v4l2_decode_vbi_line is set to the
426 * start of the VBI data that was generated by the decoder. The driver
427 * then parses the sliced VBI data and sets the other fields in the
428 * struct accordingly. The pointer p is updated to point to the start of
429 * the payload which can be copied verbatim into the data field of the
430 * &struct v4l2_sliced_vbi_data. If no valid VBI data was found, then the
431 * type field is set to 0 on return.
433 * @s_vbi_data: used to generate VBI signals on a video signal.
434 * &struct v4l2_sliced_vbi_data is filled with the data packets that
435 * should be output. Note that if you set the line field to 0, then that
436 * VBI signal is disabled. If no valid VBI data was found, then the type
437 * field is set to 0 on return.
439 * @g_vbi_data: used to obtain the sliced VBI packet from a readback register.
440 * Not all video decoders support this. If no data is available because
441 * the readback register contains invalid or erroneous data %-EIO is
442 * returned. Note that you must fill in the 'id' member and the 'field'
443 * member (to determine whether CC data from the first or second field
444 * should be obtained).
446 * @g_sliced_vbi_cap: callback for %VIDIOC_SLICED_VBI_CAP ioctl handler code.
448 * @s_raw_fmt: setup the video encoder/decoder for raw VBI.
450 * @g_sliced_fmt: retrieve the current sliced VBI settings.
452 * @s_sliced_fmt: setup the sliced VBI settings.
454 struct v4l2_subdev_vbi_ops
{
455 int (*decode_vbi_line
)(struct v4l2_subdev
*sd
, struct v4l2_decode_vbi_line
*vbi_line
);
456 int (*s_vbi_data
)(struct v4l2_subdev
*sd
, const struct v4l2_sliced_vbi_data
*vbi_data
);
457 int (*g_vbi_data
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_data
*vbi_data
);
458 int (*g_sliced_vbi_cap
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_cap
*cap
);
459 int (*s_raw_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_vbi_format
*fmt
);
460 int (*g_sliced_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_format
*fmt
);
461 int (*s_sliced_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_format
*fmt
);
465 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
466 * @g_skip_top_lines: number of lines at the top of the image to be skipped.
467 * This is needed for some sensors, which always corrupt
468 * several top lines of the output image, or which send their
470 * @g_skip_frames: number of frames to skip at stream start. This is needed for
471 * buggy sensors that generate faulty frames when they are
474 struct v4l2_subdev_sensor_ops
{
475 int (*g_skip_top_lines
)(struct v4l2_subdev
*sd
, u32
*lines
);
476 int (*g_skip_frames
)(struct v4l2_subdev
*sd
, u32
*frames
);
480 * enum v4l2_subdev_ir_mode- describes the type of IR supported
482 * @V4L2_SUBDEV_IR_MODE_PULSE_WIDTH: IR uses struct ir_raw_event records
484 enum v4l2_subdev_ir_mode
{
485 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH
,
489 * struct v4l2_subdev_ir_parameters - Parameters for IR TX or TX
491 * @bytes_per_data_element: bytes per data element of data in read or
493 * @mode: IR mode as defined by &enum v4l2_subdev_ir_mode.
494 * @enable: device is active if true
495 * @interrupt_enable: IR interrupts are enabled if true
496 * @shutdown: if true: set hardware to low/no power, false: normal mode
498 * @modulation: if true, it uses carrier, if false: baseband
499 * @max_pulse_width: maximum pulse width in ns, valid only for baseband signal
500 * @carrier_freq: carrier frequency in Hz, valid only for modulated signal
501 * @duty_cycle: duty cycle percentage, valid only for modulated signal
502 * @invert_level: invert signal level
504 * @invert_carrier_sense: Send 0/space as a carrier burst. used only in TX.
506 * @noise_filter_min_width: min time of a valid pulse, in ns. Used only for RX.
507 * @carrier_range_lower: Lower carrier range, in Hz, valid only for modulated
508 * signal. Used only for RX.
509 * @carrier_range_upper: Upper carrier range, in Hz, valid only for modulated
510 * signal. Used only for RX.
511 * @resolution: The receive resolution, in ns . Used only for RX.
513 struct v4l2_subdev_ir_parameters
{
514 unsigned int bytes_per_data_element
;
515 enum v4l2_subdev_ir_mode mode
;
518 bool interrupt_enable
;
523 unsigned int carrier_freq
;
524 unsigned int duty_cycle
;
528 bool invert_carrier_sense
;
531 u32 noise_filter_min_width
;
532 unsigned int carrier_range_lower
;
533 unsigned int carrier_range_upper
;
538 * struct v4l2_subdev_ir_ops - operations for IR subdevices
540 * @rx_read: Reads received codes or pulse width data.
541 * The semantics are similar to a non-blocking read() call.
542 * @rx_g_parameters: Get the current operating parameters and state of the
544 * @rx_s_parameters: Set the current operating parameters and state of the
545 * the IR receiver. It is recommended to call
546 * [rt]x_g_parameters first to fill out the current state, and only change
547 * the fields that need to be changed. Upon return, the actual device
548 * operating parameters and state will be returned. Note that hardware
549 * limitations may prevent the actual settings from matching the requested
550 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
551 * was requested. An exception is when the shutdown parameter is true.
552 * The last used operational parameters will be returned, but the actual
553 * state of the hardware be different to minimize power consumption and
554 * processing when shutdown is true.
556 * @tx_write: Writes codes or pulse width data for transmission.
557 * The semantics are similar to a non-blocking write() call.
558 * @tx_g_parameters: Get the current operating parameters and state of the
559 * the IR transmitter.
560 * @tx_s_parameters: Set the current operating parameters and state of the
561 * the IR transmitter. It is recommended to call
562 * [rt]x_g_parameters first to fill out the current state, and only change
563 * the fields that need to be changed. Upon return, the actual device
564 * operating parameters and state will be returned. Note that hardware
565 * limitations may prevent the actual settings from matching the requested
566 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
567 * was requested. An exception is when the shutdown parameter is true.
568 * The last used operational parameters will be returned, but the actual
569 * state of the hardware be different to minimize power consumption and
570 * processing when shutdown is true.
572 struct v4l2_subdev_ir_ops
{
574 int (*rx_read
)(struct v4l2_subdev
*sd
, u8
*buf
, size_t count
,
577 int (*rx_g_parameters
)(struct v4l2_subdev
*sd
,
578 struct v4l2_subdev_ir_parameters
*params
);
579 int (*rx_s_parameters
)(struct v4l2_subdev
*sd
,
580 struct v4l2_subdev_ir_parameters
*params
);
583 int (*tx_write
)(struct v4l2_subdev
*sd
, u8
*buf
, size_t count
,
586 int (*tx_g_parameters
)(struct v4l2_subdev
*sd
,
587 struct v4l2_subdev_ir_parameters
*params
);
588 int (*tx_s_parameters
)(struct v4l2_subdev
*sd
,
589 struct v4l2_subdev_ir_parameters
*params
);
593 * struct v4l2_subdev_pad_config - Used for storing subdev pad information.
595 * @try_fmt: pointer to &struct v4l2_mbus_framefmt
596 * @try_crop: pointer to &struct v4l2_rect to be used for crop
597 * @try_compose: pointer to &struct v4l2_rect to be used for compose
599 * This structure only needs to be passed to the pad op if the 'which' field
600 * of the main argument is set to %V4L2_SUBDEV_FORMAT_TRY. For
601 * %V4L2_SUBDEV_FORMAT_ACTIVE it is safe to pass %NULL.
603 struct v4l2_subdev_pad_config
{
604 struct v4l2_mbus_framefmt try_fmt
;
605 struct v4l2_rect try_crop
;
606 struct v4l2_rect try_compose
;
610 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
612 * @init_cfg: initialize the pad config to default values
613 * @enum_mbus_code: callback for %VIDIOC_SUBDEV_ENUM_MBUS_CODE ioctl handler
615 * @enum_frame_size: callback for %VIDIOC_SUBDEV_ENUM_FRAME_SIZE ioctl handler
618 * @enum_frame_interval: callback for %VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL ioctl
621 * @get_fmt: callback for %VIDIOC_SUBDEV_G_FMT ioctl handler code.
623 * @set_fmt: callback for %VIDIOC_SUBDEV_S_FMT ioctl handler code.
625 * @get_selection: callback for %VIDIOC_SUBDEV_G_SELECTION ioctl handler code.
627 * @set_selection: callback for %VIDIOC_SUBDEV_S_SELECTION ioctl handler code.
629 * @get_edid: callback for %VIDIOC_SUBDEV_G_EDID ioctl handler code.
631 * @set_edid: callback for %VIDIOC_SUBDEV_S_EDID ioctl handler code.
633 * @dv_timings_cap: callback for %VIDIOC_SUBDEV_DV_TIMINGS_CAP ioctl handler
636 * @enum_dv_timings: callback for %VIDIOC_SUBDEV_ENUM_DV_TIMINGS ioctl handler
639 * @link_validate: used by the media controller code to check if the links
640 * that belongs to a pipeline can be used for stream.
642 * @get_frame_desc: get the current low level media bus frame parameters.
644 * @set_frame_desc: set the low level media bus frame parameters, @fd array
645 * may be adjusted by the subdev driver to device capabilities.
647 struct v4l2_subdev_pad_ops
{
648 int (*init_cfg
)(struct v4l2_subdev
*sd
,
649 struct v4l2_subdev_pad_config
*cfg
);
650 int (*enum_mbus_code
)(struct v4l2_subdev
*sd
,
651 struct v4l2_subdev_pad_config
*cfg
,
652 struct v4l2_subdev_mbus_code_enum
*code
);
653 int (*enum_frame_size
)(struct v4l2_subdev
*sd
,
654 struct v4l2_subdev_pad_config
*cfg
,
655 struct v4l2_subdev_frame_size_enum
*fse
);
656 int (*enum_frame_interval
)(struct v4l2_subdev
*sd
,
657 struct v4l2_subdev_pad_config
*cfg
,
658 struct v4l2_subdev_frame_interval_enum
*fie
);
659 int (*get_fmt
)(struct v4l2_subdev
*sd
,
660 struct v4l2_subdev_pad_config
*cfg
,
661 struct v4l2_subdev_format
*format
);
662 int (*set_fmt
)(struct v4l2_subdev
*sd
,
663 struct v4l2_subdev_pad_config
*cfg
,
664 struct v4l2_subdev_format
*format
);
665 int (*get_selection
)(struct v4l2_subdev
*sd
,
666 struct v4l2_subdev_pad_config
*cfg
,
667 struct v4l2_subdev_selection
*sel
);
668 int (*set_selection
)(struct v4l2_subdev
*sd
,
669 struct v4l2_subdev_pad_config
*cfg
,
670 struct v4l2_subdev_selection
*sel
);
671 int (*get_edid
)(struct v4l2_subdev
*sd
, struct v4l2_edid
*edid
);
672 int (*set_edid
)(struct v4l2_subdev
*sd
, struct v4l2_edid
*edid
);
673 int (*dv_timings_cap
)(struct v4l2_subdev
*sd
,
674 struct v4l2_dv_timings_cap
*cap
);
675 int (*enum_dv_timings
)(struct v4l2_subdev
*sd
,
676 struct v4l2_enum_dv_timings
*timings
);
677 #ifdef CONFIG_MEDIA_CONTROLLER
678 int (*link_validate
)(struct v4l2_subdev
*sd
, struct media_link
*link
,
679 struct v4l2_subdev_format
*source_fmt
,
680 struct v4l2_subdev_format
*sink_fmt
);
681 #endif /* CONFIG_MEDIA_CONTROLLER */
682 int (*get_frame_desc
)(struct v4l2_subdev
*sd
, unsigned int pad
,
683 struct v4l2_mbus_frame_desc
*fd
);
684 int (*set_frame_desc
)(struct v4l2_subdev
*sd
, unsigned int pad
,
685 struct v4l2_mbus_frame_desc
*fd
);
689 * struct v4l2_subdev_ops - Subdev operations
691 * @core: pointer to &struct v4l2_subdev_core_ops. Can be %NULL
692 * @tuner: pointer to &struct v4l2_subdev_tuner_ops. Can be %NULL
693 * @audio: pointer to &struct v4l2_subdev_audio_ops. Can be %NULL
694 * @video: pointer to &struct v4l2_subdev_video_ops. Can be %NULL
695 * @vbi: pointer to &struct v4l2_subdev_vbi_ops. Can be %NULL
696 * @ir: pointer to &struct v4l2_subdev_ir_ops. Can be %NULL
697 * @sensor: pointer to &struct v4l2_subdev_sensor_ops. Can be %NULL
698 * @pad: pointer to &struct v4l2_subdev_pad_ops. Can be %NULL
700 struct v4l2_subdev_ops
{
701 const struct v4l2_subdev_core_ops
*core
;
702 const struct v4l2_subdev_tuner_ops
*tuner
;
703 const struct v4l2_subdev_audio_ops
*audio
;
704 const struct v4l2_subdev_video_ops
*video
;
705 const struct v4l2_subdev_vbi_ops
*vbi
;
706 const struct v4l2_subdev_ir_ops
*ir
;
707 const struct v4l2_subdev_sensor_ops
*sensor
;
708 const struct v4l2_subdev_pad_ops
*pad
;
712 * struct v4l2_subdev_internal_ops - V4L2 subdev internal ops
714 * @registered: called when this subdev is registered. When called the v4l2_dev
715 * field is set to the correct v4l2_device.
717 * @unregistered: called when this subdev is unregistered. When called the
718 * v4l2_dev field is still set to the correct v4l2_device.
720 * @open: called when the subdev device node is opened by an application.
722 * @close: called when the subdev device node is closed.
725 * Never call this from drivers, only the v4l2 framework can call
728 struct v4l2_subdev_internal_ops
{
729 int (*registered
)(struct v4l2_subdev
*sd
);
730 void (*unregistered
)(struct v4l2_subdev
*sd
);
731 int (*open
)(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
);
732 int (*close
)(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
);
735 #define V4L2_SUBDEV_NAME_SIZE 32
737 /* Set this flag if this subdev is a i2c device. */
738 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
739 /* Set this flag if this subdev is a spi device. */
740 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
741 /* Set this flag if this subdev needs a device node. */
742 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
743 /* Set this flag if this subdev generates events. */
744 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
746 struct regulator_bulk_data
;
749 * struct v4l2_subdev_platform_data - regulators config struct
751 * @regulators: Optional regulators used to power on/off the subdevice
752 * @num_regulators: Number of regululators
753 * @host_priv: Per-subdevice data, specific for a certain video host device
755 struct v4l2_subdev_platform_data
{
756 struct regulator_bulk_data
*regulators
;
763 * struct v4l2_subdev - describes a V4L2 sub-device
765 * @entity: pointer to &struct media_entity
766 * @list: List of sub-devices
767 * @owner: The owner is the same as the driver's &struct device owner.
768 * @owner_v4l2_dev: true if the &sd->owner matches the owner of @v4l2_dev->dev
769 * ownner. Initialized by v4l2_device_register_subdev().
770 * @flags: subdev flags. Can be:
771 * %V4L2_SUBDEV_FL_IS_I2C - Set this flag if this subdev is a i2c device;
772 * %V4L2_SUBDEV_FL_IS_SPI - Set this flag if this subdev is a spi device;
773 * %V4L2_SUBDEV_FL_HAS_DEVNODE - Set this flag if this subdev needs a
775 * %V4L2_SUBDEV_FL_HAS_EVENTS - Set this flag if this subdev generates
778 * @v4l2_dev: pointer to struct &v4l2_device
779 * @ops: pointer to struct &v4l2_subdev_ops
780 * @internal_ops: pointer to struct &v4l2_subdev_internal_ops.
781 * Never call these internal ops from within a driver!
782 * @ctrl_handler: The control handler of this subdev. May be NULL.
783 * @name: Name of the sub-device. Please notice that the name must be unique.
784 * @grp_id: can be used to group similar subdevs. Value is driver-specific
785 * @dev_priv: pointer to private data
786 * @host_priv: pointer to private data used by the device where the subdev
788 * @devnode: subdev device node
789 * @dev: pointer to the physical device, if any
790 * @of_node: The device_node of the subdev, usually the same as dev->of_node.
791 * @async_list: Links this subdev to a global subdev_list or @notifier->done
793 * @asd: Pointer to respective &struct v4l2_async_subdev.
794 * @notifier: Pointer to the managing notifier.
795 * @pdata: common part of subdevice platform data
797 * Each instance of a subdev driver should create this struct, either
798 * stand-alone or embedded in a larger struct.
800 * This structure should be initialized by v4l2_subdev_init() or one of
801 * its variants: v4l2_spi_subdev_init(), v4l2_i2c_subdev_init().
804 #if defined(CONFIG_MEDIA_CONTROLLER)
805 struct media_entity entity
;
807 struct list_head list
;
808 struct module
*owner
;
811 struct v4l2_device
*v4l2_dev
;
812 const struct v4l2_subdev_ops
*ops
;
813 const struct v4l2_subdev_internal_ops
*internal_ops
;
814 struct v4l2_ctrl_handler
*ctrl_handler
;
815 char name
[V4L2_SUBDEV_NAME_SIZE
];
819 struct video_device
*devnode
;
821 struct device_node
*of_node
;
822 struct list_head async_list
;
823 struct v4l2_async_subdev
*asd
;
824 struct v4l2_async_notifier
*notifier
;
825 struct v4l2_subdev_platform_data
*pdata
;
828 #define media_entity_to_v4l2_subdev(ent) \
829 container_of(ent, struct v4l2_subdev, entity)
830 #define vdev_to_v4l2_subdev(vdev) \
831 ((struct v4l2_subdev *)video_get_drvdata(vdev))
834 * struct v4l2_subdev_fh - Used for storing subdev information per file handle
836 * @vfh: pointer to struct v4l2_fh
837 * @pad: pointer to v4l2_subdev_pad_config
839 struct v4l2_subdev_fh
{
841 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
842 struct v4l2_subdev_pad_config
*pad
;
846 #define to_v4l2_subdev_fh(fh) \
847 container_of(fh, struct v4l2_subdev_fh, vfh)
849 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
850 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \
851 static inline struct rtype * \
852 fun_name(struct v4l2_subdev *sd, \
853 struct v4l2_subdev_pad_config *cfg, \
856 BUG_ON(pad >= sd->entity.num_pads); \
857 return &cfg[pad].field_name; \
860 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt
, v4l2_subdev_get_try_format
, try_fmt
)
861 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect
, v4l2_subdev_get_try_crop
, try_crop
)
862 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect
, v4l2_subdev_get_try_compose
, try_compose
)
865 extern const struct v4l2_file_operations v4l2_subdev_fops
;
868 * v4l2_set_subdevdata - Sets V4L2 dev private device data
870 * @sd: pointer to &struct v4l2_subdev
871 * @p: pointer to the private device data to be stored.
873 static inline void v4l2_set_subdevdata(struct v4l2_subdev
*sd
, void *p
)
879 * v4l2_get_subdevdata - Gets V4L2 dev private device data
881 * @sd: pointer to &struct v4l2_subdev
883 * Returns the pointer to the private device data to be stored.
885 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev
*sd
)
891 * v4l2_set_subdev_hostdata - Sets V4L2 dev private host data
893 * @sd: pointer to &struct v4l2_subdev
894 * @p: pointer to the private data to be stored.
896 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev
*sd
, void *p
)
902 * v4l2_get_subdev_hostdata - Gets V4L2 dev private data
904 * @sd: pointer to &struct v4l2_subdev
906 * Returns the pointer to the private host data to be stored.
908 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev
*sd
)
910 return sd
->host_priv
;
913 #ifdef CONFIG_MEDIA_CONTROLLER
916 * v4l2_subdev_link_validate_default - validates a media link
918 * @sd: pointer to &struct v4l2_subdev
919 * @link: pointer to &struct media_link
920 * @source_fmt: pointer to &struct v4l2_subdev_format
921 * @sink_fmt: pointer to &struct v4l2_subdev_format
923 * This function ensures that width, height and the media bus pixel
924 * code are equal on both source and sink of the link.
926 int v4l2_subdev_link_validate_default(struct v4l2_subdev
*sd
,
927 struct media_link
*link
,
928 struct v4l2_subdev_format
*source_fmt
,
929 struct v4l2_subdev_format
*sink_fmt
);
932 * v4l2_subdev_link_validate - validates a media link
934 * @link: pointer to &struct media_link
936 * This function calls the subdev's link_validate ops to validate
937 * if a media link is valid for streaming. It also internally
938 * calls v4l2_subdev_link_validate_default() to ensure that
939 * width, height and the media bus pixel code are equal on both
940 * source and sink of the link.
942 int v4l2_subdev_link_validate(struct media_link
*link
);
945 * v4l2_subdev_alloc_pad_config - Allocates memory for pad config
947 * @sd: pointer to struct v4l2_subdev
950 v4l2_subdev_pad_config
*v4l2_subdev_alloc_pad_config(struct v4l2_subdev
*sd
);
953 * v4l2_subdev_free_pad_config - Frees memory allocated by
954 * v4l2_subdev_alloc_pad_config().
956 * @cfg: pointer to &struct v4l2_subdev_pad_config
958 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config
*cfg
);
959 #endif /* CONFIG_MEDIA_CONTROLLER */
962 * v4l2_subdev_init - initializes the sub-device struct
964 * @sd: pointer to the &struct v4l2_subdev to be initialized
965 * @ops: pointer to &struct v4l2_subdev_ops.
967 void v4l2_subdev_init(struct v4l2_subdev
*sd
,
968 const struct v4l2_subdev_ops
*ops
);
971 * Call an ops of a v4l2_subdev, doing the right checks against
974 * Example: err = v4l2_subdev_call(sd, video, s_std, norm);
976 #define v4l2_subdev_call(sd, o, f, args...) \
977 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \
978 (sd)->ops->o->f((sd), ##args) : -ENOIOCTLCMD))
980 #define v4l2_subdev_has_op(sd, o, f) \
981 ((sd)->ops->o && (sd)->ops->o->f)
984 * v4l2_subdev_notify_event() - Delivers event notification for subdevice
985 * @sd: The subdev for which to deliver the event
986 * @ev: The event to deliver
988 * Will deliver the specified event to all userspace event listeners which are
989 * subscribed to the v42l subdev event queue as well as to the bridge driver
990 * using the notify callback. The notification type for the notify callback
991 * will be %V4L2_DEVICE_NOTIFY_EVENT.
993 void v4l2_subdev_notify_event(struct v4l2_subdev
*sd
,
994 const struct v4l2_event
*ev
);