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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifndef _V4L2_SUBDEV_H
22 #define _V4L2_SUBDEV_H
24 #include <linux/types.h>
25 #include <linux/v4l2-subdev.h>
26 #include <media/media-entity.h>
27 #include <media/v4l2-async.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-dev.h>
30 #include <media/v4l2-fh.h>
31 #include <media/v4l2-mediabus.h>
33 /* generic v4l2_device notify callback notification values */
34 #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32)
35 #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001
36 #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002
37 #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004
38 #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008
40 #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
41 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
43 #define V4L2_DEVICE_NOTIFY_EVENT _IOW('v', 2, struct v4l2_event)
46 struct v4l2_ctrl_handler;
47 struct v4l2_event_subscription;
50 struct v4l2_subdev_fh;
52 struct v4l2_mbus_frame_desc;
55 struct v4l2_decode_vbi_line {
56 u32 is_second_field; /* Set to 0 for the first (odd) field,
57 set to 1 for the second (even) field. */
58 u8 *p; /* Pointer to the sliced VBI data from the decoder.
59 On exit points to the start of the payload. */
60 u32 line; /* Line number of the sliced VBI data (1-23) */
61 u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
64 /* Sub-devices are devices that are connected somehow to the main bridge
65 device. These devices are usually audio/video muxers/encoders/decoders or
66 sensors and webcam controllers.
68 Usually these devices are controlled through an i2c bus, but other busses
71 The v4l2_subdev struct provides a way of accessing these devices in a
72 generic manner. Most operations that these sub-devices support fall in
73 a few categories: core ops, audio ops, video ops and tuner ops.
75 More categories can be added if needed, although this should remain a
76 limited set (no more than approx. 8 categories).
78 Each category has its own set of ops that subdev drivers can implement.
80 A subdev driver can leave the pointer to the category ops NULL if
81 it does not implement them (e.g. an audio subdev will generally not
82 implement the video category ops). The exception is the core category:
83 this must always be present.
85 These ops are all used internally so it is no problem to change, remove
86 or add ops or move ops from one to another category. Currently these
87 ops are based on the original ioctls, but since ops are not limited to
88 one argument there is room for improvement here once all i2c subdev
89 drivers are converted to use these ops.
92 /* Core ops: it is highly recommended to implement at least these ops:
99 This provides basic debugging support.
101 The ioctl ops is meant for generic ioctl-like commands. Depending on
102 the use-case it might be better to use subdev-specific ops (currently
103 not yet implemented) since ops provide proper type-checking.
106 /* Subdevice external IO pin configuration */
107 #define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */
108 #define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1)
109 #define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2)
110 #define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */
111 #define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */
113 struct v4l2_subdev_io_pin_config {
114 u32 flags; /* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */
115 u8 pin; /* Chip external IO pin to configure */
116 u8 function; /* Internal signal pad/function to route to IO pin */
117 u8 value; /* Initial value for pin - e.g. GPIO output value */
118 u8 strength; /* Pin drive strength */
122 s_io_pin_config: configure one or more chip I/O pins for chips that
123 multiplex different internal signal pads out to IO pins. This function
124 takes a pointer to an array of 'n' pin configuration entries, one for
125 each pin being configured. This function could be called at times
126 other than just subdevice initialization.
128 init: initialize the sensor registers to some sort of reasonable default
129 values. Do not use for new drivers and should be removed in existing
132 load_fw: load firmware.
134 reset: generic reset command. The argument selects which subsystems to
135 reset. Passing 0 will always reset the whole chip. Do not use for new
136 drivers without discussing this first on the linux-media mailinglist.
137 There should be no reason normally to reset a device.
139 s_gpio: set GPIO pins. Very simple right now, might need to be extended with
140 a direction argument if needed.
142 s_power: puts subdevice in power saving mode (on == 0) or normal operation
145 interrupt_service_routine: Called by the bridge chip's interrupt service
146 handler, when an interrupt status has be raised due to this subdev,
147 so that this subdev can handle the details. It may schedule work to be
148 performed later. It must not sleep. *Called from an IRQ context*.
150 struct v4l2_subdev_core_ops {
151 int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
152 int (*log_status)(struct v4l2_subdev *sd);
153 int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
154 struct v4l2_subdev_io_pin_config *pincfg);
155 int (*init)(struct v4l2_subdev *sd, u32 val);
156 int (*load_fw)(struct v4l2_subdev *sd);
157 int (*reset)(struct v4l2_subdev *sd, u32 val);
158 int (*s_gpio)(struct v4l2_subdev *sd, u32 val);
159 int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc);
160 int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
161 int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
162 int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
163 int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
164 int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
165 int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm);
166 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm);
167 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
168 long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
170 long (*compat_ioctl32)(struct v4l2_subdev *sd, unsigned int cmd,
173 #ifdef CONFIG_VIDEO_ADV_DEBUG
174 int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
175 int (*s_register)(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg);
177 int (*s_power)(struct v4l2_subdev *sd, int on);
178 int (*interrupt_service_routine)(struct v4l2_subdev *sd,
179 u32 status, bool *handled);
180 int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
181 struct v4l2_event_subscription *sub);
182 int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
183 struct v4l2_event_subscription *sub);
186 /* s_radio: v4l device was opened in radio mode.
188 g_frequency: freq->type must be filled in. Normally done by video_ioctl2
189 or the bridge driver.
192 s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
195 s_type_addr: sets tuner type and its I2C addr.
197 s_config: sets tda9887 specific stuff, like port1, port2 and qss
199 struct v4l2_subdev_tuner_ops {
200 int (*s_radio)(struct v4l2_subdev *sd);
201 int (*s_frequency)(struct v4l2_subdev *sd, const struct v4l2_frequency *freq);
202 int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
203 int (*enum_freq_bands)(struct v4l2_subdev *sd, struct v4l2_frequency_band *band);
204 int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
205 int (*s_tuner)(struct v4l2_subdev *sd, const struct v4l2_tuner *vt);
206 int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
207 int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm);
208 int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
209 int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
212 /* s_clock_freq: set the frequency (in Hz) of the audio clock output.
213 Used to slave an audio processor to the video decoder, ensuring that
214 audio and video remain synchronized. Usual values for the frequency
215 are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
218 s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
219 way to select I2S clock used by driving digital audio streams at some
220 board designs. Usual values for the frequency are 1024000 and 2048000.
221 If the frequency is not supported, then -EINVAL is returned.
223 s_routing: used to define the input and/or output pins of an audio chip,
224 and any additional configuration data.
225 Never attempt to use user-level input IDs (e.g. Composite, S-Video,
226 Tuner) at this level. An i2c device shouldn't know about whether an
227 input pin is connected to a Composite connector, become on another
228 board or platform it might be connected to something else entirely.
229 The calling driver is responsible for mapping a user-level input to
230 the right pins on the i2c device.
232 struct v4l2_subdev_audio_ops {
233 int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
234 int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
235 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
236 int (*s_stream)(struct v4l2_subdev *sd, int enable);
239 /* Indicates the @length field specifies maximum data length. */
240 #define V4L2_MBUS_FRAME_DESC_FL_LEN_MAX (1U << 0)
242 * Indicates that the format does not have line offsets, i.e. the
243 * receiver should use 1D DMA.
245 #define V4L2_MBUS_FRAME_DESC_FL_BLOB (1U << 1)
248 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure
249 * @flags: V4L2_MBUS_FRAME_DESC_FL_* flags
250 * @pixelcode: media bus pixel code, valid if FRAME_DESC_FL_BLOB is not set
251 * @length: number of octets per frame, valid if V4L2_MBUS_FRAME_DESC_FL_BLOB
254 struct v4l2_mbus_frame_desc_entry {
260 #define V4L2_FRAME_DESC_ENTRY_MAX 4
263 * struct v4l2_mbus_frame_desc - media bus data frame description
264 * @entry: frame descriptors array
265 * @num_entries: number of entries in @entry array
267 struct v4l2_mbus_frame_desc {
268 struct v4l2_mbus_frame_desc_entry entry[V4L2_FRAME_DESC_ENTRY_MAX];
269 unsigned short num_entries;
273 s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
276 g_std_output: get current standard for video OUTPUT devices. This is ignored
277 by video input devices.
279 g_tvnorms: get v4l2_std_id with all standards supported by the video
280 CAPTURE device. This is ignored by video output devices.
282 g_tvnorms_output: get v4l2_std_id with all standards supported by the video
283 OUTPUT device. This is ignored by video capture devices.
285 s_crystal_freq: sets the frequency of the crystal used to generate the
286 clocks in Hz. An extra flags field allows device specific configuration
287 regarding clock frequency dividers, etc. If not used, then set flags
288 to 0. If the frequency is not supported, then -EINVAL is returned.
290 g_input_status: get input status. Same as the status field in the v4l2_input
293 s_routing: see s_routing in audio_ops, except this version is for video
296 s_dv_timings(): Set custom dv timings in the sub device. This is used
297 when sub device is capable of setting detailed timing information
298 in the hardware to generate/detect the video signal.
300 g_dv_timings(): Get custom dv timings in the sub device.
302 enum_mbus_fmt: enumerate pixel formats, provided by a video data source
304 g_mbus_fmt: get the current pixel format, provided by a video data source
306 try_mbus_fmt: try to set a pixel format on a video data source
308 s_mbus_fmt: set a pixel format on a video data source
310 g_mbus_config: get supported mediabus configurations
312 s_mbus_config: set a certain mediabus configuration. This operation is added
313 for compatibility with soc-camera drivers and should not be used by new
316 s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
317 can adjust @size to a lower value and must not write more data to the
318 buffer starting at @data than the original value of @size.
320 struct v4l2_subdev_video_ops {
321 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
322 int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags);
323 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm);
324 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
325 int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
326 int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
327 int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std);
328 int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std);
329 int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
330 int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
331 int (*s_stream)(struct v4l2_subdev *sd, int enable);
332 int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc);
333 int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop);
334 int (*s_crop)(struct v4l2_subdev *sd, const struct v4l2_crop *crop);
335 int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
336 int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
337 int (*g_frame_interval)(struct v4l2_subdev *sd,
338 struct v4l2_subdev_frame_interval *interval);
339 int (*s_frame_interval)(struct v4l2_subdev *sd,
340 struct v4l2_subdev_frame_interval *interval);
341 int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize);
342 int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival);
343 int (*s_dv_timings)(struct v4l2_subdev *sd,
344 struct v4l2_dv_timings *timings);
345 int (*g_dv_timings)(struct v4l2_subdev *sd,
346 struct v4l2_dv_timings *timings);
347 int (*enum_dv_timings)(struct v4l2_subdev *sd,
348 struct v4l2_enum_dv_timings *timings);
349 int (*query_dv_timings)(struct v4l2_subdev *sd,
350 struct v4l2_dv_timings *timings);
351 int (*dv_timings_cap)(struct v4l2_subdev *sd,
352 struct v4l2_dv_timings_cap *cap);
353 int (*enum_mbus_fmt)(struct v4l2_subdev *sd, unsigned int index,
354 enum v4l2_mbus_pixelcode *code);
355 int (*enum_mbus_fsizes)(struct v4l2_subdev *sd,
356 struct v4l2_frmsizeenum *fsize);
357 int (*g_mbus_fmt)(struct v4l2_subdev *sd,
358 struct v4l2_mbus_framefmt *fmt);
359 int (*try_mbus_fmt)(struct v4l2_subdev *sd,
360 struct v4l2_mbus_framefmt *fmt);
361 int (*s_mbus_fmt)(struct v4l2_subdev *sd,
362 struct v4l2_mbus_framefmt *fmt);
363 int (*g_mbus_config)(struct v4l2_subdev *sd,
364 struct v4l2_mbus_config *cfg);
365 int (*s_mbus_config)(struct v4l2_subdev *sd,
366 const struct v4l2_mbus_config *cfg);
367 int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
372 decode_vbi_line: video decoders that support sliced VBI need to implement
373 this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the
374 start of the VBI data that was generated by the decoder. The driver
375 then parses the sliced VBI data and sets the other fields in the
376 struct accordingly. The pointer p is updated to point to the start of
377 the payload which can be copied verbatim into the data field of the
378 v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the
379 type field is set to 0 on return.
381 s_vbi_data: used to generate VBI signals on a video signal.
382 v4l2_sliced_vbi_data is filled with the data packets that should be
383 output. Note that if you set the line field to 0, then that VBI signal
384 is disabled. If no valid VBI data was found, then the type field is
387 g_vbi_data: used to obtain the sliced VBI packet from a readback register.
388 Not all video decoders support this. If no data is available because
389 the readback register contains invalid or erroneous data -EIO is
390 returned. Note that you must fill in the 'id' member and the 'field'
391 member (to determine whether CC data from the first or second field
394 s_raw_fmt: setup the video encoder/decoder for raw VBI.
396 g_sliced_fmt: retrieve the current sliced VBI settings.
398 s_sliced_fmt: setup the sliced VBI settings.
400 struct v4l2_subdev_vbi_ops {
401 int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
402 int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
403 int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
404 int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
405 int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt);
406 int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
407 int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
411 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
412 * @g_skip_top_lines: number of lines at the top of the image to be skipped.
413 * This is needed for some sensors, which always corrupt
414 * several top lines of the output image, or which send their
416 * @g_skip_frames: number of frames to skip at stream start. This is needed for
417 * buggy sensors that generate faulty frames when they are
420 struct v4l2_subdev_sensor_ops {
421 int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
422 int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames);
426 [rt]x_g_parameters: Get the current operating parameters and state of the
427 the IR receiver or transmitter.
429 [rt]x_s_parameters: Set the current operating parameters and state of the
430 the IR receiver or transmitter. It is recommended to call
431 [rt]x_g_parameters first to fill out the current state, and only change
432 the fields that need to be changed. Upon return, the actual device
433 operating parameters and state will be returned. Note that hardware
434 limitations may prevent the actual settings from matching the requested
435 settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
436 was requested. An exception is when the shutdown parameter is true.
437 The last used operational parameters will be returned, but the actual
438 state of the hardware be different to minimize power consumption and
439 processing when shutdown is true.
441 rx_read: Reads received codes or pulse width data.
442 The semantics are similar to a non-blocking read() call.
444 tx_write: Writes codes or pulse width data for transmission.
445 The semantics are similar to a non-blocking write() call.
448 enum v4l2_subdev_ir_mode {
449 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* uses struct ir_raw_event records */
452 struct v4l2_subdev_ir_parameters {
453 /* Either Rx or Tx */
454 unsigned int bytes_per_data_element; /* of data in read or write call */
455 enum v4l2_subdev_ir_mode mode;
458 bool interrupt_enable;
459 bool shutdown; /* true: set hardware to low/no power, false: normal */
461 bool modulation; /* true: uses carrier, false: baseband */
462 u32 max_pulse_width; /* ns, valid only for baseband signal */
463 unsigned int carrier_freq; /* Hz, valid only for modulated signal*/
464 unsigned int duty_cycle; /* percent, valid only for modulated signal*/
465 bool invert_level; /* invert signal level */
468 bool invert_carrier_sense; /* Send 0/space as a carrier burst */
471 u32 noise_filter_min_width; /* ns, min time of a valid pulse */
472 unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */
473 unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */
474 u32 resolution; /* ns */
477 struct v4l2_subdev_ir_ops {
479 int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count,
482 int (*rx_g_parameters)(struct v4l2_subdev *sd,
483 struct v4l2_subdev_ir_parameters *params);
484 int (*rx_s_parameters)(struct v4l2_subdev *sd,
485 struct v4l2_subdev_ir_parameters *params);
488 int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count,
491 int (*tx_g_parameters)(struct v4l2_subdev *sd,
492 struct v4l2_subdev_ir_parameters *params);
493 int (*tx_s_parameters)(struct v4l2_subdev *sd,
494 struct v4l2_subdev_ir_parameters *params);
498 * Used for storing subdev pad information. This structure only needs
499 * to be passed to the pad op if the 'which' field of the main argument
500 * is set to V4L2_SUBDEV_FORMAT_TRY. For V4L2_SUBDEV_FORMAT_ACTIVE it is
503 struct v4l2_subdev_pad_config {
504 struct v4l2_mbus_framefmt try_fmt;
505 struct v4l2_rect try_crop;
506 struct v4l2_rect try_compose;
510 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
511 * @get_frame_desc: get the current low level media bus frame parameters.
512 * @get_frame_desc: set the low level media bus frame parameters, @fd array
513 * may be adjusted by the subdev driver to device capabilities.
515 struct v4l2_subdev_pad_ops {
516 int (*enum_mbus_code)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
517 struct v4l2_subdev_mbus_code_enum *code);
518 int (*enum_frame_size)(struct v4l2_subdev *sd,
519 struct v4l2_subdev_fh *fh,
520 struct v4l2_subdev_frame_size_enum *fse);
521 int (*enum_frame_interval)(struct v4l2_subdev *sd,
522 struct v4l2_subdev_fh *fh,
523 struct v4l2_subdev_frame_interval_enum *fie);
524 int (*get_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
525 struct v4l2_subdev_format *format);
526 int (*set_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
527 struct v4l2_subdev_format *format);
528 int (*set_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
529 struct v4l2_subdev_crop *crop);
530 int (*get_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
531 struct v4l2_subdev_crop *crop);
532 int (*get_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
533 struct v4l2_subdev_selection *sel);
534 int (*set_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
535 struct v4l2_subdev_selection *sel);
536 int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
537 int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
538 int (*dv_timings_cap)(struct v4l2_subdev *sd,
539 struct v4l2_dv_timings_cap *cap);
540 int (*enum_dv_timings)(struct v4l2_subdev *sd,
541 struct v4l2_enum_dv_timings *timings);
542 #ifdef CONFIG_MEDIA_CONTROLLER
543 int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link,
544 struct v4l2_subdev_format *source_fmt,
545 struct v4l2_subdev_format *sink_fmt);
546 #endif /* CONFIG_MEDIA_CONTROLLER */
547 int (*get_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
548 struct v4l2_mbus_frame_desc *fd);
549 int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
550 struct v4l2_mbus_frame_desc *fd);
553 struct v4l2_subdev_ops {
554 const struct v4l2_subdev_core_ops *core;
555 const struct v4l2_subdev_tuner_ops *tuner;
556 const struct v4l2_subdev_audio_ops *audio;
557 const struct v4l2_subdev_video_ops *video;
558 const struct v4l2_subdev_vbi_ops *vbi;
559 const struct v4l2_subdev_ir_ops *ir;
560 const struct v4l2_subdev_sensor_ops *sensor;
561 const struct v4l2_subdev_pad_ops *pad;
565 * Internal ops. Never call this from drivers, only the v4l2 framework can call
568 * registered: called when this subdev is registered. When called the v4l2_dev
569 * field is set to the correct v4l2_device.
571 * unregistered: called when this subdev is unregistered. When called the
572 * v4l2_dev field is still set to the correct v4l2_device.
574 * open: called when the subdev device node is opened by an application.
576 * close: called when the subdev device node is closed.
578 struct v4l2_subdev_internal_ops {
579 int (*registered)(struct v4l2_subdev *sd);
580 void (*unregistered)(struct v4l2_subdev *sd);
581 int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
582 int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
585 #define V4L2_SUBDEV_NAME_SIZE 32
587 /* Set this flag if this subdev is a i2c device. */
588 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
589 /* Set this flag if this subdev is a spi device. */
590 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
591 /* Set this flag if this subdev needs a device node. */
592 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
593 /* Set this flag if this subdev generates events. */
594 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
596 struct regulator_bulk_data;
598 struct v4l2_subdev_platform_data {
599 /* Optional regulators uset to power on/off the subdevice */
600 struct regulator_bulk_data *regulators;
603 /* Per-subdevice data, specific for a certain video host device */
607 /* Each instance of a subdev driver should create this struct, either
608 stand-alone or embedded in a larger struct.
611 #if defined(CONFIG_MEDIA_CONTROLLER)
612 struct media_entity entity;
614 struct list_head list;
615 struct module *owner;
618 struct v4l2_device *v4l2_dev;
619 const struct v4l2_subdev_ops *ops;
620 /* Never call these internal ops from within a driver! */
621 const struct v4l2_subdev_internal_ops *internal_ops;
622 /* The control handler of this subdev. May be NULL. */
623 struct v4l2_ctrl_handler *ctrl_handler;
624 /* name must be unique */
625 char name[V4L2_SUBDEV_NAME_SIZE];
626 /* can be used to group similar subdevs, value is driver-specific */
628 /* pointer to private data */
631 /* subdev device node */
632 struct video_device *devnode;
633 /* pointer to the physical device, if any */
635 /* The device_node of the subdev, usually the same as dev->of_node. */
636 struct device_node *of_node;
637 /* Links this subdev to a global subdev_list or @notifier->done list. */
638 struct list_head async_list;
639 /* Pointer to respective struct v4l2_async_subdev. */
640 struct v4l2_async_subdev *asd;
641 /* Pointer to the managing notifier. */
642 struct v4l2_async_notifier *notifier;
643 /* common part of subdevice platform data */
644 struct v4l2_subdev_platform_data *pdata;
647 #define media_entity_to_v4l2_subdev(ent) \
648 container_of(ent, struct v4l2_subdev, entity)
649 #define vdev_to_v4l2_subdev(vdev) \
650 ((struct v4l2_subdev *)video_get_drvdata(vdev))
653 * Used for storing subdev information per file handle
655 struct v4l2_subdev_fh {
657 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
659 struct v4l2_mbus_framefmt try_fmt;
660 struct v4l2_rect try_crop;
661 struct v4l2_rect try_compose;
666 #define to_v4l2_subdev_fh(fh) \
667 container_of(fh, struct v4l2_subdev_fh, vfh)
669 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
670 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \
671 static inline struct rtype * \
672 v4l2_subdev_get_try_##fun_name(struct v4l2_subdev_fh *fh, \
675 BUG_ON(unlikely(pad >= vdev_to_v4l2_subdev( \
676 fh->vfh.vdev)->entity.num_pads)); \
677 return &fh->pad[pad].field_name; \
680 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, format, try_fmt)
681 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, crop, try_compose)
682 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, compose, try_compose)
685 extern const struct v4l2_file_operations v4l2_subdev_fops;
687 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
692 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
697 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
702 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
704 return sd->host_priv;
707 #ifdef CONFIG_MEDIA_CONTROLLER
708 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
709 struct media_link *link,
710 struct v4l2_subdev_format *source_fmt,
711 struct v4l2_subdev_format *sink_fmt);
712 int v4l2_subdev_link_validate(struct media_link *link);
713 #endif /* CONFIG_MEDIA_CONTROLLER */
714 void v4l2_subdev_init(struct v4l2_subdev *sd,
715 const struct v4l2_subdev_ops *ops);
717 /* Call an ops of a v4l2_subdev, doing the right checks against
720 Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip);
722 #define v4l2_subdev_call(sd, o, f, args...) \
723 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \
724 (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD))
726 /* Send a notification to v4l2_device. */
727 #define v4l2_subdev_notify(sd, notification, arg) \
728 ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \
729 (sd)->v4l2_dev->notify((sd), (notification), (arg)))
731 #define v4l2_subdev_has_op(sd, o, f) \
732 ((sd)->ops->o && (sd)->ops->o->f)