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 buses
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.
112 * enum v4l2_subdev_io_pin_bits - Subdevice external IO pin configuration
115 * @V4L2_SUBDEV_IO_PIN_DISABLE: disables a pin config. ENABLE assumed.
116 * @V4L2_SUBDEV_IO_PIN_OUTPUT: set it if pin is an output.
117 * @V4L2_SUBDEV_IO_PIN_INPUT: set it if pin is an input.
118 * @V4L2_SUBDEV_IO_PIN_SET_VALUE: to set the output value via
119 * &struct v4l2_subdev_io_pin_config->value.
120 * @V4L2_SUBDEV_IO_PIN_ACTIVE_LOW: pin active is bit 0.
121 * Otherwise, ACTIVE HIGH is assumed.
123 enum v4l2_subdev_io_pin_bits
{
124 V4L2_SUBDEV_IO_PIN_DISABLE
= 0,
125 V4L2_SUBDEV_IO_PIN_OUTPUT
= 1,
126 V4L2_SUBDEV_IO_PIN_INPUT
= 2,
127 V4L2_SUBDEV_IO_PIN_SET_VALUE
= 3,
128 V4L2_SUBDEV_IO_PIN_ACTIVE_LOW
= 4,
132 * struct v4l2_subdev_io_pin_config - Subdevice external IO pin configuration
134 * @flags: bitmask with flags for this pin's config, whose bits are defined by
135 * &enum v4l2_subdev_io_pin_bits.
136 * @pin: Chip external IO pin to configure
137 * @function: Internal signal pad/function to route to IO pin
138 * @value: Initial value for pin - e.g. GPIO output value
139 * @strength: Pin drive strength
141 struct v4l2_subdev_io_pin_config
{
150 * struct v4l2_subdev_core_ops - Define core ops callbacks for subdevs
152 * @log_status: callback for VIDIOC_LOG_STATUS() ioctl handler code.
154 * @s_io_pin_config: configure one or more chip I/O pins for chips that
155 * multiplex different internal signal pads out to IO pins. This function
156 * takes a pointer to an array of 'n' pin configuration entries, one for
157 * each pin being configured. This function could be called at times
158 * other than just subdevice initialization.
160 * @init: initialize the sensor registers to some sort of reasonable default
161 * values. Do not use for new drivers and should be removed in existing
164 * @load_fw: load firmware.
166 * @reset: generic reset command. The argument selects which subsystems to
167 * reset. Passing 0 will always reset the whole chip. Do not use for new
168 * drivers without discussing this first on the linux-media mailinglist.
169 * There should be no reason normally to reset a device.
171 * @s_gpio: set GPIO pins. Very simple right now, might need to be extended with
172 * a direction argument if needed.
174 * @ioctl: called at the end of ioctl() syscall handler at the V4L2 core.
175 * used to provide support for private ioctls used on the driver.
177 * @compat_ioctl32: called when a 32 bits application uses a 64 bits Kernel,
178 * in order to fix data passed from/to userspace.
180 * @g_register: callback for VIDIOC_DBG_G_REGISTER() ioctl handler code.
182 * @s_register: callback for VIDIOC_DBG_S_REGISTER() ioctl handler code.
184 * @s_power: puts subdevice in power saving mode (on == 0) or normal operation
187 * @interrupt_service_routine: Called by the bridge chip's interrupt service
188 * handler, when an interrupt status has be raised due to this subdev,
189 * so that this subdev can handle the details. It may schedule work to be
190 * performed later. It must not sleep. **Called from an IRQ context**.
192 * @subscribe_event: used by the drivers to request the control framework that
193 * for it to be warned when the value of a control changes.
195 * @unsubscribe_event: remove event subscription from the control framework.
197 struct v4l2_subdev_core_ops
{
198 int (*log_status
)(struct v4l2_subdev
*sd
);
199 int (*s_io_pin_config
)(struct v4l2_subdev
*sd
, size_t n
,
200 struct v4l2_subdev_io_pin_config
*pincfg
);
201 int (*init
)(struct v4l2_subdev
*sd
, u32 val
);
202 int (*load_fw
)(struct v4l2_subdev
*sd
);
203 int (*reset
)(struct v4l2_subdev
*sd
, u32 val
);
204 int (*s_gpio
)(struct v4l2_subdev
*sd
, u32 val
);
205 long (*ioctl
)(struct v4l2_subdev
*sd
, unsigned int cmd
, void *arg
);
207 long (*compat_ioctl32
)(struct v4l2_subdev
*sd
, unsigned int cmd
,
210 #ifdef CONFIG_VIDEO_ADV_DEBUG
211 int (*g_register
)(struct v4l2_subdev
*sd
, struct v4l2_dbg_register
*reg
);
212 int (*s_register
)(struct v4l2_subdev
*sd
, const struct v4l2_dbg_register
*reg
);
214 int (*s_power
)(struct v4l2_subdev
*sd
, int on
);
215 int (*interrupt_service_routine
)(struct v4l2_subdev
*sd
,
216 u32 status
, bool *handled
);
217 int (*subscribe_event
)(struct v4l2_subdev
*sd
, struct v4l2_fh
*fh
,
218 struct v4l2_event_subscription
*sub
);
219 int (*unsubscribe_event
)(struct v4l2_subdev
*sd
, struct v4l2_fh
*fh
,
220 struct v4l2_event_subscription
*sub
);
224 * struct v4l2_subdev_tuner_ops - Callbacks used when v4l device was opened
227 * @standby: puts the tuner in standby mode. It will be woken up
228 * automatically the next time it is used.
230 * @s_radio: callback that switches the tuner to radio mode.
231 * drivers should explicitly call it when a tuner ops should
232 * operate on radio mode, before being able to handle it.
233 * Used on devices that have both AM/FM radio receiver and TV.
235 * @s_frequency: callback for VIDIOC_S_FREQUENCY() ioctl handler code.
237 * @g_frequency: callback for VIDIOC_G_FREQUENCY() ioctl handler code.
238 * freq->type must be filled in. Normally done by video_ioctl2()
239 * or the bridge driver.
241 * @enum_freq_bands: callback for VIDIOC_ENUM_FREQ_BANDS() ioctl handler code.
243 * @g_tuner: callback for VIDIOC_G_TUNER() ioctl handler code.
245 * @s_tuner: callback for VIDIOC_S_TUNER() ioctl handler code. @vt->type must be
246 * filled in. Normally done by video_ioctl2 or the
249 * @g_modulator: callback for VIDIOC_G_MODULATOR() ioctl handler code.
251 * @s_modulator: callback for VIDIOC_S_MODULATOR() ioctl handler code.
253 * @s_type_addr: sets tuner type and its I2C addr.
255 * @s_config: sets tda9887 specific stuff, like port1, port2 and qss
259 * On devices that have both AM/FM and TV, it is up to the driver
260 * to explicitly call s_radio when the tuner should be switched to
261 * radio mode, before handling other &struct v4l2_subdev_tuner_ops
262 * that would require it. An example of such usage is::
264 * static void s_frequency(void *priv, const struct v4l2_frequency *f)
267 * if (f.type == V4L2_TUNER_RADIO)
268 * v4l2_device_call_all(v4l2_dev, 0, tuner, s_radio);
270 * v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency);
273 struct v4l2_subdev_tuner_ops
{
274 int (*standby
)(struct v4l2_subdev
*sd
);
275 int (*s_radio
)(struct v4l2_subdev
*sd
);
276 int (*s_frequency
)(struct v4l2_subdev
*sd
, const struct v4l2_frequency
*freq
);
277 int (*g_frequency
)(struct v4l2_subdev
*sd
, struct v4l2_frequency
*freq
);
278 int (*enum_freq_bands
)(struct v4l2_subdev
*sd
, struct v4l2_frequency_band
*band
);
279 int (*g_tuner
)(struct v4l2_subdev
*sd
, struct v4l2_tuner
*vt
);
280 int (*s_tuner
)(struct v4l2_subdev
*sd
, const struct v4l2_tuner
*vt
);
281 int (*g_modulator
)(struct v4l2_subdev
*sd
, struct v4l2_modulator
*vm
);
282 int (*s_modulator
)(struct v4l2_subdev
*sd
, const struct v4l2_modulator
*vm
);
283 int (*s_type_addr
)(struct v4l2_subdev
*sd
, struct tuner_setup
*type
);
284 int (*s_config
)(struct v4l2_subdev
*sd
, const struct v4l2_priv_tun_config
*config
);
288 * struct v4l2_subdev_audio_ops - Callbacks used for audio-related settings
290 * @s_clock_freq: set the frequency (in Hz) of the audio clock output.
291 * Used to slave an audio processor to the video decoder, ensuring that
292 * audio and video remain synchronized. Usual values for the frequency
293 * are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
294 * -EINVAL is returned.
296 * @s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
297 * way to select I2S clock used by driving digital audio streams at some
298 * board designs. Usual values for the frequency are 1024000 and 2048000.
299 * If the frequency is not supported, then %-EINVAL is returned.
301 * @s_routing: used to define the input and/or output pins of an audio chip,
302 * and any additional configuration data.
303 * Never attempt to use user-level input IDs (e.g. Composite, S-Video,
304 * Tuner) at this level. An i2c device shouldn't know about whether an
305 * input pin is connected to a Composite connector, become on another
306 * board or platform it might be connected to something else entirely.
307 * The calling driver is responsible for mapping a user-level input to
308 * the right pins on the i2c device.
310 * @s_stream: used to notify the audio code that stream will start or has
313 struct v4l2_subdev_audio_ops
{
314 int (*s_clock_freq
)(struct v4l2_subdev
*sd
, u32 freq
);
315 int (*s_i2s_clock_freq
)(struct v4l2_subdev
*sd
, u32 freq
);
316 int (*s_routing
)(struct v4l2_subdev
*sd
, u32 input
, u32 output
, u32 config
);
317 int (*s_stream
)(struct v4l2_subdev
*sd
, int enable
);
321 * enum v4l2_mbus_frame_desc_entry - media bus frame description flags
323 * @V4L2_MBUS_FRAME_DESC_FL_LEN_MAX:
324 * Indicates that &struct v4l2_mbus_frame_desc_entry->length field
325 * specifies maximum data length.
326 * @V4L2_MBUS_FRAME_DESC_FL_BLOB:
327 * Indicates that the format does not have line offsets, i.e.
328 * the receiver should use 1D DMA.
330 enum v4l2_mbus_frame_desc_flags
{
331 V4L2_MBUS_FRAME_DESC_FL_LEN_MAX
= BIT(0),
332 V4L2_MBUS_FRAME_DESC_FL_BLOB
= BIT(1),
336 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure
338 * @flags: bitmask flags, as defined by &enum v4l2_mbus_frame_desc_flags.
339 * @pixelcode: media bus pixel code, valid if @flags
340 * %FRAME_DESC_FL_BLOB is not set.
341 * @length: number of octets per frame, valid if @flags
342 * %V4L2_MBUS_FRAME_DESC_FL_LEN_MAX is set.
344 struct v4l2_mbus_frame_desc_entry
{
345 enum v4l2_mbus_frame_desc_flags flags
;
350 #define V4L2_FRAME_DESC_ENTRY_MAX 4
353 * struct v4l2_mbus_frame_desc - media bus data frame description
354 * @entry: frame descriptors array
355 * @num_entries: number of entries in @entry array
357 struct v4l2_mbus_frame_desc
{
358 struct v4l2_mbus_frame_desc_entry entry
[V4L2_FRAME_DESC_ENTRY_MAX
];
359 unsigned short num_entries
;
363 * struct v4l2_subdev_video_ops - Callbacks used when v4l device was opened
366 * @s_routing: see s_routing in audio_ops, except this version is for video
369 * @s_crystal_freq: sets the frequency of the crystal used to generate the
370 * clocks in Hz. An extra flags field allows device specific configuration
371 * regarding clock frequency dividers, etc. If not used, then set flags
372 * to 0. If the frequency is not supported, then -EINVAL is returned.
374 * @g_std: callback for VIDIOC_G_STD() ioctl handler code.
376 * @s_std: callback for VIDIOC_S_STD() ioctl handler code.
378 * @s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
379 * video input devices.
381 * @g_std_output: get current standard for video OUTPUT devices. This is ignored
382 * by video input devices.
384 * @querystd: callback for VIDIOC_QUERYSTD() ioctl handler code.
386 * @g_tvnorms: get &v4l2_std_id with all standards supported by the video
387 * CAPTURE device. This is ignored by video output devices.
389 * @g_tvnorms_output: get v4l2_std_id with all standards supported by the video
390 * OUTPUT device. This is ignored by video capture devices.
392 * @g_input_status: get input status. Same as the status field in the
393 * &struct &v4l2_input
395 * @s_stream: used to notify the driver that a video stream will start or has
398 * @g_pixelaspect: callback to return the pixelaspect ratio.
400 * @g_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
401 * ioctl handler code.
403 * @s_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
404 * ioctl handler code.
406 * @s_dv_timings: Set custom dv timings in the sub device. This is used
407 * when sub device is capable of setting detailed timing information
408 * in the hardware to generate/detect the video signal.
410 * @g_dv_timings: Get custom dv timings in the sub device.
412 * @query_dv_timings: callback for VIDIOC_QUERY_DV_TIMINGS() ioctl handler code.
414 * @g_mbus_config: get supported mediabus configurations
416 * @s_mbus_config: set a certain mediabus configuration. This operation is added
417 * for compatibility with soc-camera drivers and should not be used by new
420 * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
421 * can adjust @size to a lower value and must not write more data to the
422 * buffer starting at @data than the original value of @size.
424 struct v4l2_subdev_video_ops
{
425 int (*s_routing
)(struct v4l2_subdev
*sd
, u32 input
, u32 output
, u32 config
);
426 int (*s_crystal_freq
)(struct v4l2_subdev
*sd
, u32 freq
, u32 flags
);
427 int (*g_std
)(struct v4l2_subdev
*sd
, v4l2_std_id
*norm
);
428 int (*s_std
)(struct v4l2_subdev
*sd
, v4l2_std_id norm
);
429 int (*s_std_output
)(struct v4l2_subdev
*sd
, v4l2_std_id std
);
430 int (*g_std_output
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
431 int (*querystd
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
432 int (*g_tvnorms
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
433 int (*g_tvnorms_output
)(struct v4l2_subdev
*sd
, v4l2_std_id
*std
);
434 int (*g_input_status
)(struct v4l2_subdev
*sd
, u32
*status
);
435 int (*s_stream
)(struct v4l2_subdev
*sd
, int enable
);
436 int (*g_pixelaspect
)(struct v4l2_subdev
*sd
, struct v4l2_fract
*aspect
);
437 int (*g_frame_interval
)(struct v4l2_subdev
*sd
,
438 struct v4l2_subdev_frame_interval
*interval
);
439 int (*s_frame_interval
)(struct v4l2_subdev
*sd
,
440 struct v4l2_subdev_frame_interval
*interval
);
441 int (*s_dv_timings
)(struct v4l2_subdev
*sd
,
442 struct v4l2_dv_timings
*timings
);
443 int (*g_dv_timings
)(struct v4l2_subdev
*sd
,
444 struct v4l2_dv_timings
*timings
);
445 int (*query_dv_timings
)(struct v4l2_subdev
*sd
,
446 struct v4l2_dv_timings
*timings
);
447 int (*g_mbus_config
)(struct v4l2_subdev
*sd
,
448 struct v4l2_mbus_config
*cfg
);
449 int (*s_mbus_config
)(struct v4l2_subdev
*sd
,
450 const struct v4l2_mbus_config
*cfg
);
451 int (*s_rx_buffer
)(struct v4l2_subdev
*sd
, void *buf
,
456 * struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened
457 * in video mode via the vbi device node.
459 * @decode_vbi_line: video decoders that support sliced VBI need to implement
460 * this ioctl. Field p of the &struct v4l2_decode_vbi_line is set to the
461 * start of the VBI data that was generated by the decoder. The driver
462 * then parses the sliced VBI data and sets the other fields in the
463 * struct accordingly. The pointer p is updated to point to the start of
464 * the payload which can be copied verbatim into the data field of the
465 * &struct v4l2_sliced_vbi_data. If no valid VBI data was found, then the
466 * type field is set to 0 on return.
468 * @s_vbi_data: used to generate VBI signals on a video signal.
469 * &struct v4l2_sliced_vbi_data is filled with the data packets that
470 * should be output. Note that if you set the line field to 0, then that
471 * VBI signal is disabled. If no valid VBI data was found, then the type
472 * field is set to 0 on return.
474 * @g_vbi_data: used to obtain the sliced VBI packet from a readback register.
475 * Not all video decoders support this. If no data is available because
476 * the readback register contains invalid or erroneous data %-EIO is
477 * returned. Note that you must fill in the 'id' member and the 'field'
478 * member (to determine whether CC data from the first or second field
479 * should be obtained).
481 * @g_sliced_vbi_cap: callback for VIDIOC_G_SLICED_VBI_CAP() ioctl handler
484 * @s_raw_fmt: setup the video encoder/decoder for raw VBI.
486 * @g_sliced_fmt: retrieve the current sliced VBI settings.
488 * @s_sliced_fmt: setup the sliced VBI settings.
490 struct v4l2_subdev_vbi_ops
{
491 int (*decode_vbi_line
)(struct v4l2_subdev
*sd
, struct v4l2_decode_vbi_line
*vbi_line
);
492 int (*s_vbi_data
)(struct v4l2_subdev
*sd
, const struct v4l2_sliced_vbi_data
*vbi_data
);
493 int (*g_vbi_data
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_data
*vbi_data
);
494 int (*g_sliced_vbi_cap
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_cap
*cap
);
495 int (*s_raw_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_vbi_format
*fmt
);
496 int (*g_sliced_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_format
*fmt
);
497 int (*s_sliced_fmt
)(struct v4l2_subdev
*sd
, struct v4l2_sliced_vbi_format
*fmt
);
501 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
502 * @g_skip_top_lines: number of lines at the top of the image to be skipped.
503 * This is needed for some sensors, which always corrupt
504 * several top lines of the output image, or which send their
506 * @g_skip_frames: number of frames to skip at stream start. This is needed for
507 * buggy sensors that generate faulty frames when they are
510 struct v4l2_subdev_sensor_ops
{
511 int (*g_skip_top_lines
)(struct v4l2_subdev
*sd
, u32
*lines
);
512 int (*g_skip_frames
)(struct v4l2_subdev
*sd
, u32
*frames
);
516 * enum v4l2_subdev_ir_mode- describes the type of IR supported
518 * @V4L2_SUBDEV_IR_MODE_PULSE_WIDTH: IR uses struct ir_raw_event records
520 enum v4l2_subdev_ir_mode
{
521 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH
,
525 * struct v4l2_subdev_ir_parameters - Parameters for IR TX or TX
527 * @bytes_per_data_element: bytes per data element of data in read or
529 * @mode: IR mode as defined by &enum v4l2_subdev_ir_mode.
530 * @enable: device is active if true
531 * @interrupt_enable: IR interrupts are enabled if true
532 * @shutdown: if true: set hardware to low/no power, false: normal mode
534 * @modulation: if true, it uses carrier, if false: baseband
535 * @max_pulse_width: maximum pulse width in ns, valid only for baseband signal
536 * @carrier_freq: carrier frequency in Hz, valid only for modulated signal
537 * @duty_cycle: duty cycle percentage, valid only for modulated signal
538 * @invert_level: invert signal level
540 * @invert_carrier_sense: Send 0/space as a carrier burst. used only in TX.
542 * @noise_filter_min_width: min time of a valid pulse, in ns. Used only for RX.
543 * @carrier_range_lower: Lower carrier range, in Hz, valid only for modulated
544 * signal. Used only for RX.
545 * @carrier_range_upper: Upper carrier range, in Hz, valid only for modulated
546 * signal. Used only for RX.
547 * @resolution: The receive resolution, in ns . Used only for RX.
549 struct v4l2_subdev_ir_parameters
{
550 unsigned int bytes_per_data_element
;
551 enum v4l2_subdev_ir_mode mode
;
554 bool interrupt_enable
;
559 unsigned int carrier_freq
;
560 unsigned int duty_cycle
;
564 bool invert_carrier_sense
;
567 u32 noise_filter_min_width
;
568 unsigned int carrier_range_lower
;
569 unsigned int carrier_range_upper
;
574 * struct v4l2_subdev_ir_ops - operations for IR subdevices
576 * @rx_read: Reads received codes or pulse width data.
577 * The semantics are similar to a non-blocking read() call.
578 * @rx_g_parameters: Get the current operating parameters and state of the
580 * @rx_s_parameters: Set the current operating parameters and state of the
581 * the IR receiver. It is recommended to call
582 * [rt]x_g_parameters first to fill out the current state, and only change
583 * the fields that need to be changed. Upon return, the actual device
584 * operating parameters and state will be returned. Note that hardware
585 * limitations may prevent the actual settings from matching the requested
586 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
587 * was requested. An exception is when the shutdown parameter is true.
588 * The last used operational parameters will be returned, but the actual
589 * state of the hardware be different to minimize power consumption and
590 * processing when shutdown is true.
592 * @tx_write: Writes codes or pulse width data for transmission.
593 * The semantics are similar to a non-blocking write() call.
594 * @tx_g_parameters: Get the current operating parameters and state of the
595 * the IR transmitter.
596 * @tx_s_parameters: Set the current operating parameters and state of the
597 * the IR transmitter. It is recommended to call
598 * [rt]x_g_parameters first to fill out the current state, and only change
599 * the fields that need to be changed. Upon return, the actual device
600 * operating parameters and state will be returned. Note that hardware
601 * limitations may prevent the actual settings from matching the requested
602 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
603 * was requested. An exception is when the shutdown parameter is true.
604 * The last used operational parameters will be returned, but the actual
605 * state of the hardware be different to minimize power consumption and
606 * processing when shutdown is true.
608 struct v4l2_subdev_ir_ops
{
610 int (*rx_read
)(struct v4l2_subdev
*sd
, u8
*buf
, size_t count
,
613 int (*rx_g_parameters
)(struct v4l2_subdev
*sd
,
614 struct v4l2_subdev_ir_parameters
*params
);
615 int (*rx_s_parameters
)(struct v4l2_subdev
*sd
,
616 struct v4l2_subdev_ir_parameters
*params
);
619 int (*tx_write
)(struct v4l2_subdev
*sd
, u8
*buf
, size_t count
,
622 int (*tx_g_parameters
)(struct v4l2_subdev
*sd
,
623 struct v4l2_subdev_ir_parameters
*params
);
624 int (*tx_s_parameters
)(struct v4l2_subdev
*sd
,
625 struct v4l2_subdev_ir_parameters
*params
);
629 * struct v4l2_subdev_pad_config - Used for storing subdev pad information.
631 * @try_fmt: &struct v4l2_mbus_framefmt
632 * @try_crop: &struct v4l2_rect to be used for crop
633 * @try_compose: &struct v4l2_rect to be used for compose
635 * This structure only needs to be passed to the pad op if the 'which' field
636 * of the main argument is set to %V4L2_SUBDEV_FORMAT_TRY. For
637 * %V4L2_SUBDEV_FORMAT_ACTIVE it is safe to pass %NULL.
639 struct v4l2_subdev_pad_config
{
640 struct v4l2_mbus_framefmt try_fmt
;
641 struct v4l2_rect try_crop
;
642 struct v4l2_rect try_compose
;
646 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
648 * @init_cfg: initialize the pad config to default values
649 * @enum_mbus_code: callback for VIDIOC_SUBDEV_ENUM_MBUS_CODE() ioctl handler
651 * @enum_frame_size: callback for VIDIOC_SUBDEV_ENUM_FRAME_SIZE() ioctl handler
654 * @enum_frame_interval: callback for VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL() ioctl
657 * @get_fmt: callback for VIDIOC_SUBDEV_G_FMT() ioctl handler code.
659 * @set_fmt: callback for VIDIOC_SUBDEV_S_FMT() ioctl handler code.
661 * @get_selection: callback for VIDIOC_SUBDEV_G_SELECTION() ioctl handler code.
663 * @set_selection: callback for VIDIOC_SUBDEV_S_SELECTION() ioctl handler code.
665 * @get_edid: callback for VIDIOC_SUBDEV_G_EDID() ioctl handler code.
667 * @set_edid: callback for VIDIOC_SUBDEV_S_EDID() ioctl handler code.
669 * @dv_timings_cap: callback for VIDIOC_SUBDEV_DV_TIMINGS_CAP() ioctl handler
672 * @enum_dv_timings: callback for VIDIOC_SUBDEV_ENUM_DV_TIMINGS() ioctl handler
675 * @link_validate: used by the media controller code to check if the links
676 * that belongs to a pipeline can be used for stream.
678 * @get_frame_desc: get the current low level media bus frame parameters.
680 * @set_frame_desc: set the low level media bus frame parameters, @fd array
681 * may be adjusted by the subdev driver to device capabilities.
683 struct v4l2_subdev_pad_ops
{
684 int (*init_cfg
)(struct v4l2_subdev
*sd
,
685 struct v4l2_subdev_pad_config
*cfg
);
686 int (*enum_mbus_code
)(struct v4l2_subdev
*sd
,
687 struct v4l2_subdev_pad_config
*cfg
,
688 struct v4l2_subdev_mbus_code_enum
*code
);
689 int (*enum_frame_size
)(struct v4l2_subdev
*sd
,
690 struct v4l2_subdev_pad_config
*cfg
,
691 struct v4l2_subdev_frame_size_enum
*fse
);
692 int (*enum_frame_interval
)(struct v4l2_subdev
*sd
,
693 struct v4l2_subdev_pad_config
*cfg
,
694 struct v4l2_subdev_frame_interval_enum
*fie
);
695 int (*get_fmt
)(struct v4l2_subdev
*sd
,
696 struct v4l2_subdev_pad_config
*cfg
,
697 struct v4l2_subdev_format
*format
);
698 int (*set_fmt
)(struct v4l2_subdev
*sd
,
699 struct v4l2_subdev_pad_config
*cfg
,
700 struct v4l2_subdev_format
*format
);
701 int (*get_selection
)(struct v4l2_subdev
*sd
,
702 struct v4l2_subdev_pad_config
*cfg
,
703 struct v4l2_subdev_selection
*sel
);
704 int (*set_selection
)(struct v4l2_subdev
*sd
,
705 struct v4l2_subdev_pad_config
*cfg
,
706 struct v4l2_subdev_selection
*sel
);
707 int (*get_edid
)(struct v4l2_subdev
*sd
, struct v4l2_edid
*edid
);
708 int (*set_edid
)(struct v4l2_subdev
*sd
, struct v4l2_edid
*edid
);
709 int (*dv_timings_cap
)(struct v4l2_subdev
*sd
,
710 struct v4l2_dv_timings_cap
*cap
);
711 int (*enum_dv_timings
)(struct v4l2_subdev
*sd
,
712 struct v4l2_enum_dv_timings
*timings
);
713 #ifdef CONFIG_MEDIA_CONTROLLER
714 int (*link_validate
)(struct v4l2_subdev
*sd
, struct media_link
*link
,
715 struct v4l2_subdev_format
*source_fmt
,
716 struct v4l2_subdev_format
*sink_fmt
);
717 #endif /* CONFIG_MEDIA_CONTROLLER */
718 int (*get_frame_desc
)(struct v4l2_subdev
*sd
, unsigned int pad
,
719 struct v4l2_mbus_frame_desc
*fd
);
720 int (*set_frame_desc
)(struct v4l2_subdev
*sd
, unsigned int pad
,
721 struct v4l2_mbus_frame_desc
*fd
);
725 * struct v4l2_subdev_ops - Subdev operations
727 * @core: pointer to &struct v4l2_subdev_core_ops. Can be %NULL
728 * @tuner: pointer to &struct v4l2_subdev_tuner_ops. Can be %NULL
729 * @audio: pointer to &struct v4l2_subdev_audio_ops. Can be %NULL
730 * @video: pointer to &struct v4l2_subdev_video_ops. Can be %NULL
731 * @vbi: pointer to &struct v4l2_subdev_vbi_ops. Can be %NULL
732 * @ir: pointer to &struct v4l2_subdev_ir_ops. Can be %NULL
733 * @sensor: pointer to &struct v4l2_subdev_sensor_ops. Can be %NULL
734 * @pad: pointer to &struct v4l2_subdev_pad_ops. Can be %NULL
736 struct v4l2_subdev_ops
{
737 const struct v4l2_subdev_core_ops
*core
;
738 const struct v4l2_subdev_tuner_ops
*tuner
;
739 const struct v4l2_subdev_audio_ops
*audio
;
740 const struct v4l2_subdev_video_ops
*video
;
741 const struct v4l2_subdev_vbi_ops
*vbi
;
742 const struct v4l2_subdev_ir_ops
*ir
;
743 const struct v4l2_subdev_sensor_ops
*sensor
;
744 const struct v4l2_subdev_pad_ops
*pad
;
748 * struct v4l2_subdev_internal_ops - V4L2 subdev internal ops
750 * @registered: called when this subdev is registered. When called the v4l2_dev
751 * field is set to the correct v4l2_device.
753 * @unregistered: called when this subdev is unregistered. When called the
754 * v4l2_dev field is still set to the correct v4l2_device.
756 * @open: called when the subdev device node is opened by an application.
758 * @close: called when the subdev device node is closed.
761 * Never call this from drivers, only the v4l2 framework can call
764 struct v4l2_subdev_internal_ops
{
765 int (*registered
)(struct v4l2_subdev
*sd
);
766 void (*unregistered
)(struct v4l2_subdev
*sd
);
767 int (*open
)(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
);
768 int (*close
)(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
);
771 #define V4L2_SUBDEV_NAME_SIZE 32
773 /* Set this flag if this subdev is a i2c device. */
774 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
775 /* Set this flag if this subdev is a spi device. */
776 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
777 /* Set this flag if this subdev needs a device node. */
778 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
780 * Set this flag if this subdev generates events.
781 * Note controls can send events, thus drivers exposing controls
782 * should set this flag.
784 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
786 struct regulator_bulk_data
;
789 * struct v4l2_subdev_platform_data - regulators config struct
791 * @regulators: Optional regulators used to power on/off the subdevice
792 * @num_regulators: Number of regululators
793 * @host_priv: Per-subdevice data, specific for a certain video host device
795 struct v4l2_subdev_platform_data
{
796 struct regulator_bulk_data
*regulators
;
803 * struct v4l2_subdev - describes a V4L2 sub-device
805 * @entity: pointer to &struct media_entity
806 * @list: List of sub-devices
807 * @owner: The owner is the same as the driver's &struct device owner.
808 * @owner_v4l2_dev: true if the &sd->owner matches the owner of @v4l2_dev->dev
809 * owner. Initialized by v4l2_device_register_subdev().
810 * @flags: subdev flags. Can be:
811 * %V4L2_SUBDEV_FL_IS_I2C - Set this flag if this subdev is a i2c device;
812 * %V4L2_SUBDEV_FL_IS_SPI - Set this flag if this subdev is a spi device;
813 * %V4L2_SUBDEV_FL_HAS_DEVNODE - Set this flag if this subdev needs a
815 * %V4L2_SUBDEV_FL_HAS_EVENTS - Set this flag if this subdev generates
818 * @v4l2_dev: pointer to struct &v4l2_device
819 * @ops: pointer to struct &v4l2_subdev_ops
820 * @internal_ops: pointer to struct &v4l2_subdev_internal_ops.
821 * Never call these internal ops from within a driver!
822 * @ctrl_handler: The control handler of this subdev. May be NULL.
823 * @name: Name of the sub-device. Please notice that the name must be unique.
824 * @grp_id: can be used to group similar subdevs. Value is driver-specific
825 * @dev_priv: pointer to private data
826 * @host_priv: pointer to private data used by the device where the subdev
828 * @devnode: subdev device node
829 * @dev: pointer to the physical device, if any
830 * @fwnode: The fwnode_handle of the subdev, usually the same as
831 * either dev->of_node->fwnode or dev->fwnode (whichever is non-NULL).
832 * @async_list: Links this subdev to a global subdev_list or @notifier->done
834 * @asd: Pointer to respective &struct v4l2_async_subdev.
835 * @notifier: Pointer to the managing notifier.
836 * @subdev_notifier: A sub-device notifier implicitly registered for the sub-
837 * device using v4l2_device_register_sensor_subdev().
838 * @pdata: common part of subdevice platform data
840 * Each instance of a subdev driver should create this struct, either
841 * stand-alone or embedded in a larger struct.
843 * This structure should be initialized by v4l2_subdev_init() or one of
844 * its variants: v4l2_spi_subdev_init(), v4l2_i2c_subdev_init().
847 #if defined(CONFIG_MEDIA_CONTROLLER)
848 struct media_entity entity
;
850 struct list_head list
;
851 struct module
*owner
;
854 struct v4l2_device
*v4l2_dev
;
855 const struct v4l2_subdev_ops
*ops
;
856 const struct v4l2_subdev_internal_ops
*internal_ops
;
857 struct v4l2_ctrl_handler
*ctrl_handler
;
858 char name
[V4L2_SUBDEV_NAME_SIZE
];
862 struct video_device
*devnode
;
864 struct fwnode_handle
*fwnode
;
865 struct list_head async_list
;
866 struct v4l2_async_subdev
*asd
;
867 struct v4l2_async_notifier
*notifier
;
868 struct v4l2_async_notifier
*subdev_notifier
;
869 struct v4l2_subdev_platform_data
*pdata
;
874 * media_entity_to_v4l2_subdev - Returns a &struct v4l2_subdev from
875 * the &struct media_entity embedded in it.
877 * @ent: pointer to &struct media_entity.
879 #define media_entity_to_v4l2_subdev(ent) \
881 typeof(ent) __me_sd_ent = (ent); \
884 container_of(__me_sd_ent, struct v4l2_subdev, entity) : \
889 * vdev_to_v4l2_subdev - Returns a &struct v4l2_subdev from
890 * the &struct video_device embedded on it.
892 * @vdev: pointer to &struct video_device
894 #define vdev_to_v4l2_subdev(vdev) \
895 ((struct v4l2_subdev *)video_get_drvdata(vdev))
898 * struct v4l2_subdev_fh - Used for storing subdev information per file handle
900 * @vfh: pointer to &struct v4l2_fh
901 * @pad: pointer to &struct v4l2_subdev_pad_config
903 struct v4l2_subdev_fh
{
905 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
906 struct v4l2_subdev_pad_config
*pad
;
911 * to_v4l2_subdev_fh - Returns a &struct v4l2_subdev_fh from
912 * the &struct v4l2_fh embedded on it.
914 * @fh: pointer to &struct v4l2_fh
916 #define to_v4l2_subdev_fh(fh) \
917 container_of(fh, struct v4l2_subdev_fh, vfh)
919 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
922 * v4l2_subdev_get_try_format - ancillary routine to call
923 * &struct v4l2_subdev_pad_config->try_fmt
925 * @sd: pointer to &struct v4l2_subdev
926 * @cfg: pointer to &struct v4l2_subdev_pad_config array.
927 * @pad: index of the pad in the @cfg array.
929 static inline struct v4l2_mbus_framefmt
930 *v4l2_subdev_get_try_format(struct v4l2_subdev
*sd
,
931 struct v4l2_subdev_pad_config
*cfg
,
934 if (WARN_ON(pad
>= sd
->entity
.num_pads
))
936 return &cfg
[pad
].try_fmt
;
940 * v4l2_subdev_get_try_crop - ancillary routine to call
941 * &struct v4l2_subdev_pad_config->try_crop
943 * @sd: pointer to &struct v4l2_subdev
944 * @cfg: pointer to &struct v4l2_subdev_pad_config array.
945 * @pad: index of the pad in the @cfg array.
947 static inline struct v4l2_rect
948 *v4l2_subdev_get_try_crop(struct v4l2_subdev
*sd
,
949 struct v4l2_subdev_pad_config
*cfg
,
952 if (WARN_ON(pad
>= sd
->entity
.num_pads
))
954 return &cfg
[pad
].try_crop
;
958 * v4l2_subdev_get_try_crop - ancillary routine to call
959 * &struct v4l2_subdev_pad_config->try_compose
961 * @sd: pointer to &struct v4l2_subdev
962 * @cfg: pointer to &struct v4l2_subdev_pad_config array.
963 * @pad: index of the pad in the @cfg array.
965 static inline struct v4l2_rect
966 *v4l2_subdev_get_try_compose(struct v4l2_subdev
*sd
,
967 struct v4l2_subdev_pad_config
*cfg
,
970 if (WARN_ON(pad
>= sd
->entity
.num_pads
))
972 return &cfg
[pad
].try_compose
;
976 extern const struct v4l2_file_operations v4l2_subdev_fops
;
979 * v4l2_set_subdevdata - Sets V4L2 dev private device data
981 * @sd: pointer to &struct v4l2_subdev
982 * @p: pointer to the private device data to be stored.
984 static inline void v4l2_set_subdevdata(struct v4l2_subdev
*sd
, void *p
)
990 * v4l2_get_subdevdata - Gets V4L2 dev private device data
992 * @sd: pointer to &struct v4l2_subdev
994 * Returns the pointer to the private device data to be stored.
996 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev
*sd
)
1002 * v4l2_set_subdev_hostdata - Sets V4L2 dev private host data
1004 * @sd: pointer to &struct v4l2_subdev
1005 * @p: pointer to the private data to be stored.
1007 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev
*sd
, void *p
)
1013 * v4l2_get_subdev_hostdata - Gets V4L2 dev private data
1015 * @sd: pointer to &struct v4l2_subdev
1017 * Returns the pointer to the private host data to be stored.
1019 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev
*sd
)
1021 return sd
->host_priv
;
1024 #ifdef CONFIG_MEDIA_CONTROLLER
1027 * v4l2_subdev_link_validate_default - validates a media link
1029 * @sd: pointer to &struct v4l2_subdev
1030 * @link: pointer to &struct media_link
1031 * @source_fmt: pointer to &struct v4l2_subdev_format
1032 * @sink_fmt: pointer to &struct v4l2_subdev_format
1034 * This function ensures that width, height and the media bus pixel
1035 * code are equal on both source and sink of the link.
1037 int v4l2_subdev_link_validate_default(struct v4l2_subdev
*sd
,
1038 struct media_link
*link
,
1039 struct v4l2_subdev_format
*source_fmt
,
1040 struct v4l2_subdev_format
*sink_fmt
);
1043 * v4l2_subdev_link_validate - validates a media link
1045 * @link: pointer to &struct media_link
1047 * This function calls the subdev's link_validate ops to validate
1048 * if a media link is valid for streaming. It also internally
1049 * calls v4l2_subdev_link_validate_default() to ensure that
1050 * width, height and the media bus pixel code are equal on both
1051 * source and sink of the link.
1053 int v4l2_subdev_link_validate(struct media_link
*link
);
1056 * v4l2_subdev_alloc_pad_config - Allocates memory for pad config
1058 * @sd: pointer to struct v4l2_subdev
1061 v4l2_subdev_pad_config
*v4l2_subdev_alloc_pad_config(struct v4l2_subdev
*sd
);
1064 * v4l2_subdev_free_pad_config - Frees memory allocated by
1065 * v4l2_subdev_alloc_pad_config().
1067 * @cfg: pointer to &struct v4l2_subdev_pad_config
1069 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config
*cfg
);
1070 #endif /* CONFIG_MEDIA_CONTROLLER */
1073 * v4l2_subdev_init - initializes the sub-device struct
1075 * @sd: pointer to the &struct v4l2_subdev to be initialized
1076 * @ops: pointer to &struct v4l2_subdev_ops.
1078 void v4l2_subdev_init(struct v4l2_subdev
*sd
,
1079 const struct v4l2_subdev_ops
*ops
);
1082 * v4l2_subdev_call - call an operation of a v4l2_subdev.
1084 * @sd: pointer to the &struct v4l2_subdev
1085 * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
1086 * Each element there groups a set of callbacks functions.
1087 * @f: callback function that will be called if @cond matches.
1088 * The callback functions are defined in groups, according to
1089 * each element at &struct v4l2_subdev_ops.
1090 * @args...: arguments for @f.
1092 * Example: err = v4l2_subdev_call(sd, video, s_std, norm);
1094 #define v4l2_subdev_call(sd, o, f, args...) \
1096 struct v4l2_subdev *__sd = (sd); \
1099 __result = -ENODEV; \
1100 else if (!(__sd->ops->o && __sd->ops->o->f)) \
1101 __result = -ENOIOCTLCMD; \
1103 __result = __sd->ops->o->f(__sd, ##args); \
1108 * v4l2_subdev_has_op - Checks if a subdev defines a certain operation.
1110 * @sd: pointer to the &struct v4l2_subdev
1111 * @o: The group of callback functions in &struct v4l2_subdev_ops
1112 * which @f is a part of.
1113 * @f: callback function to be checked for its existence.
1115 #define v4l2_subdev_has_op(sd, o, f) \
1116 ((sd)->ops->o && (sd)->ops->o->f)
1119 * v4l2_subdev_notify_event() - Delivers event notification for subdevice
1120 * @sd: The subdev for which to deliver the event
1121 * @ev: The event to deliver
1123 * Will deliver the specified event to all userspace event listeners which are
1124 * subscribed to the v42l subdev event queue as well as to the bridge driver
1125 * using the notify callback. The notification type for the notify callback
1126 * will be %V4L2_DEVICE_NOTIFY_EVENT.
1128 void v4l2_subdev_notify_event(struct v4l2_subdev
*sd
,
1129 const struct v4l2_event
*ev
);