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
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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;
48 struct v4l2_event_subscription;
51 struct v4l2_subdev_fh;
53 struct v4l2_mbus_frame_desc;
56 struct v4l2_decode_vbi_line {
57 u32 is_second_field; /* Set to 0 for the first (odd) field,
58 set to 1 for the second (even) field. */
59 u8 *p; /* Pointer to the sliced VBI data from the decoder.
60 On exit points to the start of the payload. */
61 u32 line; /* Line number of the sliced VBI data (1-23) */
62 u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
65 /* Sub-devices are devices that are connected somehow to the main bridge
66 device. These devices are usually audio/video muxers/encoders/decoders or
67 sensors and webcam controllers.
69 Usually these devices are controlled through an i2c bus, but other busses
72 The v4l2_subdev struct provides a way of accessing these devices in a
73 generic manner. Most operations that these sub-devices support fall in
74 a few categories: core ops, audio ops, video ops and tuner ops.
76 More categories can be added if needed, although this should remain a
77 limited set (no more than approx. 8 categories).
79 Each category has its own set of ops that subdev drivers can implement.
81 A subdev driver can leave the pointer to the category ops NULL if
82 it does not implement them (e.g. an audio subdev will generally not
83 implement the video category ops). The exception is the core category:
84 this must always be present.
86 These ops are all used internally so it is no problem to change, remove
87 or add ops or move ops from one to another category. Currently these
88 ops are based on the original ioctls, but since ops are not limited to
89 one argument there is room for improvement here once all i2c subdev
90 drivers are converted to use these ops.
93 /* 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 * struct v4l2_subdev_core_ops - Define ops callbacks for subdevs
124 * @s_io_pin_config: configure one or more chip I/O pins for chips that
125 * multiplex different internal signal pads out to IO pins. This function
126 * takes a pointer to an array of 'n' pin configuration entries, one for
127 * each pin being configured. This function could be called at times
128 * other than just subdevice initialization.
130 * @init: initialize the sensor registers to some sort of reasonable default
131 * values. Do not use for new drivers and should be removed in existing
134 * @load_fw: load firmware.
136 * @reset: generic reset command. The argument selects which subsystems to
137 * reset. Passing 0 will always reset the whole chip. Do not use for new
138 * drivers without discussing this first on the linux-media mailinglist.
139 * There should be no reason normally to reset a device.
141 * @s_gpio: set GPIO pins. Very simple right now, might need to be extended with
142 * a direction argument if needed.
144 * @s_power: puts subdevice in power saving mode (on == 0) or normal operation
147 * @interrupt_service_routine: Called by the bridge chip's interrupt service
148 * handler, when an interrupt status has be raised due to this subdev,
149 * so that this subdev can handle the details. It may schedule work to be
150 * performed later. It must not sleep. *Called from an IRQ context*.
152 struct v4l2_subdev_core_ops {
153 int (*log_status)(struct v4l2_subdev *sd);
154 int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
155 struct v4l2_subdev_io_pin_config *pincfg);
156 int (*init)(struct v4l2_subdev *sd, u32 val);
157 int (*load_fw)(struct v4l2_subdev *sd);
158 int (*reset)(struct v4l2_subdev *sd, u32 val);
159 int (*s_gpio)(struct v4l2_subdev *sd, u32 val);
160 int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc);
161 int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
162 int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
163 int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
164 int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
165 int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
166 int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm);
167 long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
169 long (*compat_ioctl32)(struct v4l2_subdev *sd, unsigned int cmd,
172 #ifdef CONFIG_VIDEO_ADV_DEBUG
173 int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
174 int (*s_register)(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg);
176 int (*s_power)(struct v4l2_subdev *sd, int on);
177 int (*interrupt_service_routine)(struct v4l2_subdev *sd,
178 u32 status, bool *handled);
179 int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
180 struct v4l2_event_subscription *sub);
181 int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
182 struct v4l2_event_subscription *sub);
186 * struct s_radio - Callbacks used when 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.
191 * @s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
194 * @s_type_addr: sets tuner type and its I2C addr.
195 * @s_config: sets tda9887 specific stuff, like port1, port2 and qss
197 struct v4l2_subdev_tuner_ops {
198 int (*s_radio)(struct v4l2_subdev *sd);
199 int (*s_frequency)(struct v4l2_subdev *sd, const struct v4l2_frequency *freq);
200 int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
201 int (*enum_freq_bands)(struct v4l2_subdev *sd, struct v4l2_frequency_band *band);
202 int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
203 int (*s_tuner)(struct v4l2_subdev *sd, const struct v4l2_tuner *vt);
204 int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
205 int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm);
206 int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
207 int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
211 * struct v4l2_subdev_audio_ops - Callbacks used for audio-related settings
213 * @s_clock_freq: set the frequency (in Hz) of the audio clock output.
214 * Used to slave an audio processor to the video decoder, ensuring that
215 * audio and video remain synchronized. Usual values for the frequency
216 * are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
217 * -EINVAL is returned.
219 * @s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
220 * way to select I2S clock used by driving digital audio streams at some
221 * board designs. Usual values for the frequency are 1024000 and 2048000.
222 * If the frequency is not supported, then -EINVAL is returned.
224 * @s_routing: used to define the input and/or output pins of an audio chip,
225 * and any additional configuration data.
226 * Never attempt to use user-level input IDs (e.g. Composite, S-Video,
227 * Tuner) at this level. An i2c device shouldn't know about whether an
228 * input pin is connected to a Composite connector, become on another
229 * board or platform it might be connected to something else entirely.
230 * The calling driver is responsible for mapping a user-level input to
231 * the right pins on the i2c device.
233 struct v4l2_subdev_audio_ops {
234 int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
235 int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
236 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
237 int (*s_stream)(struct v4l2_subdev *sd, int enable);
240 /* Indicates the @length field specifies maximum data length. */
241 #define V4L2_MBUS_FRAME_DESC_FL_LEN_MAX (1U << 0)
243 * Indicates that the format does not have line offsets, i.e. the
244 * receiver should use 1D DMA.
246 #define V4L2_MBUS_FRAME_DESC_FL_BLOB (1U << 1)
249 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure
251 * @flags: V4L2_MBUS_FRAME_DESC_FL_* flags
252 * @pixelcode: media bus pixel code, valid if FRAME_DESC_FL_BLOB is not set
253 * @length: number of octets per frame, valid if V4L2_MBUS_FRAME_DESC_FL_BLOB
256 struct v4l2_mbus_frame_desc_entry {
262 #define V4L2_FRAME_DESC_ENTRY_MAX 4
265 * struct v4l2_mbus_frame_desc - media bus data frame description
266 * @entry: frame descriptors array
267 * @num_entries: number of entries in @entry array
269 struct v4l2_mbus_frame_desc {
270 struct v4l2_mbus_frame_desc_entry entry[V4L2_FRAME_DESC_ENTRY_MAX];
271 unsigned short num_entries;
275 * struct v4l2_subdev_video_ops - Callbacks used when v4l device was opened
277 * @s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
278 * video input devices.
280 * @g_std_output: get current standard for video OUTPUT devices. This is ignored
281 * by video input devices.
283 * @g_tvnorms: get v4l2_std_id with all standards supported by the video
284 * CAPTURE device. This is ignored by video output devices.
286 * @g_tvnorms_output: get v4l2_std_id with all standards supported by the video
287 * OUTPUT device. This is ignored by video capture devices.
289 * @s_crystal_freq: sets the frequency of the crystal used to generate the
290 * clocks in Hz. An extra flags field allows device specific configuration
291 * regarding clock frequency dividers, etc. If not used, then set flags
292 * to 0. If the frequency is not supported, then -EINVAL is returned.
294 * @g_input_status: get input status. Same as the status field in the v4l2_input
297 * @s_routing: see s_routing in audio_ops, except this version is for video
300 * @s_dv_timings(): Set custom dv timings in the sub device. This is used
301 * when sub device is capable of setting detailed timing information
302 * in the hardware to generate/detect the video signal.
304 * @g_dv_timings(): Get custom dv timings in the sub device.
305 * @g_mbus_config: get supported mediabus configurations
307 * @s_mbus_config: set a certain mediabus configuration. This operation is added
308 * for compatibility with soc-camera drivers and should not be used by new
311 * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
312 * can adjust @size to a lower value and must not write more data to the
313 * buffer starting at @data than the original value of @size.
315 struct v4l2_subdev_video_ops {
316 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
317 int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags);
318 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm);
319 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
320 int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
321 int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
322 int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std);
323 int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std);
324 int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
325 int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
326 int (*s_stream)(struct v4l2_subdev *sd, int enable);
327 int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc);
328 int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop);
329 int (*s_crop)(struct v4l2_subdev *sd, const struct v4l2_crop *crop);
330 int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
331 int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
332 int (*g_frame_interval)(struct v4l2_subdev *sd,
333 struct v4l2_subdev_frame_interval *interval);
334 int (*s_frame_interval)(struct v4l2_subdev *sd,
335 struct v4l2_subdev_frame_interval *interval);
336 int (*s_dv_timings)(struct v4l2_subdev *sd,
337 struct v4l2_dv_timings *timings);
338 int (*g_dv_timings)(struct v4l2_subdev *sd,
339 struct v4l2_dv_timings *timings);
340 int (*query_dv_timings)(struct v4l2_subdev *sd,
341 struct v4l2_dv_timings *timings);
342 int (*g_mbus_config)(struct v4l2_subdev *sd,
343 struct v4l2_mbus_config *cfg);
344 int (*s_mbus_config)(struct v4l2_subdev *sd,
345 const struct v4l2_mbus_config *cfg);
346 int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
351 * struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened
352 * in video mode via the vbi device node.
354 * @decode_vbi_line: video decoders that support sliced VBI need to implement
355 * this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the
356 * start of the VBI data that was generated by the decoder. The driver
357 * then parses the sliced VBI data and sets the other fields in the
358 * struct accordingly. The pointer p is updated to point to the start of
359 * the payload which can be copied verbatim into the data field of the
360 * v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the
361 * type field is set to 0 on return.
363 * @s_vbi_data: used to generate VBI signals on a video signal.
364 * v4l2_sliced_vbi_data is filled with the data packets that should be
365 * output. Note that if you set the line field to 0, then that VBI signal
366 * is disabled. If no valid VBI data was found, then the type field is
367 * set to 0 on return.
369 * @g_vbi_data: used to obtain the sliced VBI packet from a readback register.
370 * Not all video decoders support this. If no data is available because
371 * the readback register contains invalid or erroneous data -EIO is
372 * returned. Note that you must fill in the 'id' member and the 'field'
373 * member (to determine whether CC data from the first or second field
374 * should be obtained).
376 * @s_raw_fmt: setup the video encoder/decoder for raw VBI.
378 * @g_sliced_fmt: retrieve the current sliced VBI settings.
380 * @s_sliced_fmt: setup the sliced VBI settings.
382 struct v4l2_subdev_vbi_ops {
383 int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
384 int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
385 int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
386 int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
387 int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt);
388 int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
389 int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
393 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
394 * @g_skip_top_lines: number of lines at the top of the image to be skipped.
395 * This is needed for some sensors, which always corrupt
396 * several top lines of the output image, or which send their
398 * @g_skip_frames: number of frames to skip at stream start. This is needed for
399 * buggy sensors that generate faulty frames when they are
402 struct v4l2_subdev_sensor_ops {
403 int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
404 int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames);
408 [rt]x_g_parameters: Get the current operating parameters and state of the
409 the IR receiver or transmitter.
411 [rt]x_s_parameters: Set the current operating parameters and state of the
412 the IR receiver or transmitter. It is recommended to call
413 [rt]x_g_parameters first to fill out the current state, and only change
414 the fields that need to be changed. Upon return, the actual device
415 operating parameters and state will be returned. Note that hardware
416 limitations may prevent the actual settings from matching the requested
417 settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
418 was requested. An exception is when the shutdown parameter is true.
419 The last used operational parameters will be returned, but the actual
420 state of the hardware be different to minimize power consumption and
421 processing when shutdown is true.
423 rx_read: Reads received codes or pulse width data.
424 The semantics are similar to a non-blocking read() call.
426 tx_write: Writes codes or pulse width data for transmission.
427 The semantics are similar to a non-blocking write() call.
430 enum v4l2_subdev_ir_mode {
431 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* uses struct ir_raw_event records */
434 struct v4l2_subdev_ir_parameters {
435 /* Either Rx or Tx */
436 unsigned int bytes_per_data_element; /* of data in read or write call */
437 enum v4l2_subdev_ir_mode mode;
440 bool interrupt_enable;
441 bool shutdown; /* true: set hardware to low/no power, false: normal */
443 bool modulation; /* true: uses carrier, false: baseband */
444 u32 max_pulse_width; /* ns, valid only for baseband signal */
445 unsigned int carrier_freq; /* Hz, valid only for modulated signal*/
446 unsigned int duty_cycle; /* percent, valid only for modulated signal*/
447 bool invert_level; /* invert signal level */
450 bool invert_carrier_sense; /* Send 0/space as a carrier burst */
453 u32 noise_filter_min_width; /* ns, min time of a valid pulse */
454 unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */
455 unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */
456 u32 resolution; /* ns */
459 struct v4l2_subdev_ir_ops {
461 int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count,
464 int (*rx_g_parameters)(struct v4l2_subdev *sd,
465 struct v4l2_subdev_ir_parameters *params);
466 int (*rx_s_parameters)(struct v4l2_subdev *sd,
467 struct v4l2_subdev_ir_parameters *params);
470 int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count,
473 int (*tx_g_parameters)(struct v4l2_subdev *sd,
474 struct v4l2_subdev_ir_parameters *params);
475 int (*tx_s_parameters)(struct v4l2_subdev *sd,
476 struct v4l2_subdev_ir_parameters *params);
480 * Used for storing subdev pad information. This structure only needs
481 * to be passed to the pad op if the 'which' field of the main argument
482 * is set to V4L2_SUBDEV_FORMAT_TRY. For V4L2_SUBDEV_FORMAT_ACTIVE it is
485 struct v4l2_subdev_pad_config {
486 struct v4l2_mbus_framefmt try_fmt;
487 struct v4l2_rect try_crop;
488 struct v4l2_rect try_compose;
492 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
493 * @get_frame_desc: get the current low level media bus frame parameters.
494 * @get_frame_desc: set the low level media bus frame parameters, @fd array
495 * may be adjusted by the subdev driver to device capabilities.
497 struct v4l2_subdev_pad_ops {
498 int (*enum_mbus_code)(struct v4l2_subdev *sd,
499 struct v4l2_subdev_pad_config *cfg,
500 struct v4l2_subdev_mbus_code_enum *code);
501 int (*enum_frame_size)(struct v4l2_subdev *sd,
502 struct v4l2_subdev_pad_config *cfg,
503 struct v4l2_subdev_frame_size_enum *fse);
504 int (*enum_frame_interval)(struct v4l2_subdev *sd,
505 struct v4l2_subdev_pad_config *cfg,
506 struct v4l2_subdev_frame_interval_enum *fie);
507 int (*get_fmt)(struct v4l2_subdev *sd,
508 struct v4l2_subdev_pad_config *cfg,
509 struct v4l2_subdev_format *format);
510 int (*set_fmt)(struct v4l2_subdev *sd,
511 struct v4l2_subdev_pad_config *cfg,
512 struct v4l2_subdev_format *format);
513 int (*get_selection)(struct v4l2_subdev *sd,
514 struct v4l2_subdev_pad_config *cfg,
515 struct v4l2_subdev_selection *sel);
516 int (*set_selection)(struct v4l2_subdev *sd,
517 struct v4l2_subdev_pad_config *cfg,
518 struct v4l2_subdev_selection *sel);
519 int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
520 int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
521 int (*dv_timings_cap)(struct v4l2_subdev *sd,
522 struct v4l2_dv_timings_cap *cap);
523 int (*enum_dv_timings)(struct v4l2_subdev *sd,
524 struct v4l2_enum_dv_timings *timings);
525 #ifdef CONFIG_MEDIA_CONTROLLER
526 int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link,
527 struct v4l2_subdev_format *source_fmt,
528 struct v4l2_subdev_format *sink_fmt);
529 #endif /* CONFIG_MEDIA_CONTROLLER */
530 int (*get_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
531 struct v4l2_mbus_frame_desc *fd);
532 int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
533 struct v4l2_mbus_frame_desc *fd);
536 struct v4l2_subdev_ops {
537 const struct v4l2_subdev_core_ops *core;
538 const struct v4l2_subdev_tuner_ops *tuner;
539 const struct v4l2_subdev_audio_ops *audio;
540 const struct v4l2_subdev_video_ops *video;
541 const struct v4l2_subdev_vbi_ops *vbi;
542 const struct v4l2_subdev_ir_ops *ir;
543 const struct v4l2_subdev_sensor_ops *sensor;
544 const struct v4l2_subdev_pad_ops *pad;
548 * Internal ops. Never call this from drivers, only the v4l2 framework can call
551 * registered: called when this subdev is registered. When called the v4l2_dev
552 * field is set to the correct v4l2_device.
554 * unregistered: called when this subdev is unregistered. When called the
555 * v4l2_dev field is still set to the correct v4l2_device.
557 * open: called when the subdev device node is opened by an application.
559 * close: called when the subdev device node is closed.
561 struct v4l2_subdev_internal_ops {
562 int (*registered)(struct v4l2_subdev *sd);
563 void (*unregistered)(struct v4l2_subdev *sd);
564 int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
565 int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
568 #define V4L2_SUBDEV_NAME_SIZE 32
570 /* Set this flag if this subdev is a i2c device. */
571 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
572 /* Set this flag if this subdev is a spi device. */
573 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
574 /* Set this flag if this subdev needs a device node. */
575 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
576 /* Set this flag if this subdev generates events. */
577 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
579 struct regulator_bulk_data;
581 struct v4l2_subdev_platform_data {
582 /* Optional regulators uset to power on/off the subdevice */
583 struct regulator_bulk_data *regulators;
586 /* Per-subdevice data, specific for a certain video host device */
590 /* Each instance of a subdev driver should create this struct, either
591 stand-alone or embedded in a larger struct.
594 #if defined(CONFIG_MEDIA_CONTROLLER)
595 struct media_entity entity;
597 struct list_head list;
598 struct module *owner;
601 struct v4l2_device *v4l2_dev;
602 const struct v4l2_subdev_ops *ops;
603 /* Never call these internal ops from within a driver! */
604 const struct v4l2_subdev_internal_ops *internal_ops;
605 /* The control handler of this subdev. May be NULL. */
606 struct v4l2_ctrl_handler *ctrl_handler;
607 /* name must be unique */
608 char name[V4L2_SUBDEV_NAME_SIZE];
609 /* can be used to group similar subdevs, value is driver-specific */
611 /* pointer to private data */
614 /* subdev device node */
615 struct video_device *devnode;
616 /* pointer to the physical device, if any */
618 /* The device_node of the subdev, usually the same as dev->of_node. */
619 struct device_node *of_node;
620 /* Links this subdev to a global subdev_list or @notifier->done list. */
621 struct list_head async_list;
622 /* Pointer to respective struct v4l2_async_subdev. */
623 struct v4l2_async_subdev *asd;
624 /* Pointer to the managing notifier. */
625 struct v4l2_async_notifier *notifier;
626 /* common part of subdevice platform data */
627 struct v4l2_subdev_platform_data *pdata;
630 #define media_entity_to_v4l2_subdev(ent) \
631 container_of(ent, struct v4l2_subdev, entity)
632 #define vdev_to_v4l2_subdev(vdev) \
633 ((struct v4l2_subdev *)video_get_drvdata(vdev))
636 * Used for storing subdev information per file handle
638 struct v4l2_subdev_fh {
640 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
641 struct v4l2_subdev_pad_config *pad;
645 #define to_v4l2_subdev_fh(fh) \
646 container_of(fh, struct v4l2_subdev_fh, vfh)
648 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
649 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \
650 static inline struct rtype * \
651 fun_name(struct v4l2_subdev *sd, \
652 struct v4l2_subdev_pad_config *cfg, \
655 BUG_ON(pad >= sd->entity.num_pads); \
656 return &cfg[pad].field_name; \
659 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, v4l2_subdev_get_try_format, try_fmt)
660 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, v4l2_subdev_get_try_crop, try_crop)
661 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, v4l2_subdev_get_try_compose, try_compose)
664 extern const struct v4l2_file_operations v4l2_subdev_fops;
666 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
671 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
676 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
681 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
683 return sd->host_priv;
686 #ifdef CONFIG_MEDIA_CONTROLLER
687 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
688 struct media_link *link,
689 struct v4l2_subdev_format *source_fmt,
690 struct v4l2_subdev_format *sink_fmt);
691 int v4l2_subdev_link_validate(struct media_link *link);
692 #endif /* CONFIG_MEDIA_CONTROLLER */
693 void v4l2_subdev_init(struct v4l2_subdev *sd,
694 const struct v4l2_subdev_ops *ops);
696 /* Call an ops of a v4l2_subdev, doing the right checks against
699 Example: err = v4l2_subdev_call(sd, video, s_std, norm);
701 #define v4l2_subdev_call(sd, o, f, args...) \
702 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \
703 (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD))
705 #define v4l2_subdev_has_op(sd, o, f) \
706 ((sd)->ops->o && (sd)->ops->o->f)
708 void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
709 const struct v4l2_event *ev);