1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 v4l2 common internal API header
4
5 This header contains internal shared ioctl definitions for use by the
6 internal low-level v4l2 drivers.
7 Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
8 define,
9
10 Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
11
12 */
13
14 #ifndef V4L2_COMMON_H_
15 #define V4L2_COMMON_H_
16
17 #include <linux/time.h>
18 #include <media/v4l2-dev.h>
19
20 /* Common printk constructs for v4l-i2c drivers. These macros create a unique
21 prefix consisting of the driver name, the adapter number and the i2c
22 address. */
23 #define v4l_printk(level, name, adapter, addr, fmt, arg...) \
24 printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)
25
26 #define v4l_client_printk(level, client, fmt, arg...) \
27 v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \
28 (client)->addr, fmt , ## arg)
29
30 #define v4l_err(client, fmt, arg...) \
31 v4l_client_printk(KERN_ERR, client, fmt , ## arg)
32
33 #define v4l_warn(client, fmt, arg...) \
34 v4l_client_printk(KERN_WARNING, client, fmt , ## arg)
35
36 #define v4l_info(client, fmt, arg...) \
37 v4l_client_printk(KERN_INFO, client, fmt , ## arg)
38
39 /* These three macros assume that the debug level is set with a module
40 parameter called 'debug'. */
41 #define v4l_dbg(level, debug, client, fmt, arg...) \
42 do { \
43 if (debug >= (level)) \
44 v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
45 } while (0)
46
47 /* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */
48 #define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \
49 do { \
50 if (__debug >= (__level)) \
51 dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \
52 } while (0)
53
54 /* ------------------------------------------------------------------------- */
55
56 /* These printk constructs can be used with v4l2_device and v4l2_subdev */
57 #define v4l2_printk(level, dev, fmt, arg...) \
58 printk(level "%s: " fmt, (dev)->name , ## arg)
59
60 #define v4l2_err(dev, fmt, arg...) \
61 v4l2_printk(KERN_ERR, dev, fmt , ## arg)
62
63 #define v4l2_warn(dev, fmt, arg...) \
64 v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
65
66 #define v4l2_info(dev, fmt, arg...) \
67 v4l2_printk(KERN_INFO, dev, fmt , ## arg)
68
69 /* These three macros assume that the debug level is set with a module
70 parameter called 'debug'. */
71 #define v4l2_dbg(level, debug, dev, fmt, arg...) \
72 do { \
73 if (debug >= (level)) \
74 v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
75 } while (0)
76
77 /**
78 * v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl
79 *
80 * @qctrl: pointer to the &struct v4l2_queryctrl to be filled
81 * @min: minimum value for the control
82 * @max: maximum value for the control
83 * @step: control step
84 * @def: default value for the control
85 *
86 * Fills the &struct v4l2_queryctrl fields for the query control.
87 *
88 * .. note::
89 *
90 * This function assumes that the @qctrl->id field is filled.
91 *
92 * Returns -EINVAL if the control is not known by the V4L2 core, 0 on success.
93 */
94
95 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
96 s32 min, s32 max, s32 step, s32 def);
97
98 /* ------------------------------------------------------------------------- */
99
100 struct v4l2_device;
101 struct v4l2_subdev;
102 struct v4l2_subdev_ops;
103
104 /* I2C Helper functions */
105 #include <linux/i2c.h>
106
107 /**
108 * enum v4l2_i2c_tuner_type - specifies the range of tuner address that
109 * should be used when seeking for I2C devices.
110 *
111 * @ADDRS_RADIO: Radio tuner addresses.
112 * Represent the following I2C addresses:
113 * 0x10 (if compiled with tea5761 support)
114 * and 0x60.
115 * @ADDRS_DEMOD: Demod tuner addresses.
116 * Represent the following I2C addresses:
117 * 0x42, 0x43, 0x4a and 0x4b.
118 * @ADDRS_TV: TV tuner addresses.
119 * Represent the following I2C addresses:
120 * 0x42, 0x43, 0x4a, 0x4b, 0x60, 0x61, 0x62,
121 * 0x63 and 0x64.
122 * @ADDRS_TV_WITH_DEMOD: TV tuner addresses if demod is present, this
123 * excludes addresses used by the demodulator
124 * from the list of candidates.
125 * Represent the following I2C addresses:
126 * 0x60, 0x61, 0x62, 0x63 and 0x64.
127 *
128 * NOTE: All I2C addresses above use the 7-bit notation.
129 */
130 enum v4l2_i2c_tuner_type {
131 ADDRS_RADIO,
132 ADDRS_DEMOD,
133 ADDRS_TV,
134 ADDRS_TV_WITH_DEMOD,
135 };
136
137 #if defined(CONFIG_VIDEO_V4L2_I2C)
138
139 /**
140 * v4l2_i2c_new_subdev - Load an i2c module and return an initialized
141 * &struct v4l2_subdev.
142 *
143 * @v4l2_dev: pointer to &struct v4l2_device
144 * @adapter: pointer to struct i2c_adapter
145 * @client_type: name of the chip that's on the adapter.
146 * @addr: I2C address. If zero, it will use @probe_addrs
147 * @probe_addrs: array with a list of address. The last entry at such
148 * array should be %I2C_CLIENT_END.
149 *
150 * returns a &struct v4l2_subdev pointer.
151 */
152 struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
153 struct i2c_adapter *adapter, const char *client_type,
154 u8 addr, const unsigned short *probe_addrs);
155
156 /**
157 * v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
158 * &struct v4l2_subdev.
159 *
160 * @v4l2_dev: pointer to &struct v4l2_device
161 * @adapter: pointer to struct i2c_adapter
162 * @info: pointer to struct i2c_board_info used to replace the irq,
163 * platform_data and addr arguments.
164 * @probe_addrs: array with a list of address. The last entry at such
165 * array should be %I2C_CLIENT_END.
166 *
167 * returns a &struct v4l2_subdev pointer.
168 */
169 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
170 struct i2c_adapter *adapter, struct i2c_board_info *info,
171 const unsigned short *probe_addrs);
172
173 /**
174 * v4l2_i2c_subdev_set_name - Set name for an I²C sub-device
175 *
176 * @sd: pointer to &struct v4l2_subdev
177 * @client: pointer to struct i2c_client
178 * @devname: the name of the device; if NULL, the I²C device's name will be used
179 * @postfix: sub-device specific string to put right after the I²C device name;
180 * may be NULL
181 */
182 void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
183 const char *devname, const char *postfix);
184
185 /**
186 * v4l2_i2c_subdev_init - Initializes a &struct v4l2_subdev with data from
187 * an i2c_client struct.
188 *
189 * @sd: pointer to &struct v4l2_subdev
190 * @client: pointer to struct i2c_client
191 * @ops: pointer to &struct v4l2_subdev_ops
192 */
193 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
194 const struct v4l2_subdev_ops *ops);
195
196 /**
197 * v4l2_i2c_subdev_addr - returns i2c client address of &struct v4l2_subdev.
198 *
199 * @sd: pointer to &struct v4l2_subdev
200 *
201 * Returns the address of an I2C sub-device
202 */
203 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
204
205 /**
206 * v4l2_i2c_tuner_addrs - Return a list of I2C tuner addresses to probe.
207 *
208 * @type: type of the tuner to seek, as defined by
209 * &enum v4l2_i2c_tuner_type.
210 *
211 * NOTE: Use only if the tuner addresses are unknown.
212 */
213 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
214
215 /**
216 * v4l2_i2c_subdev_unregister - Unregister a v4l2_subdev
217 *
218 * @sd: pointer to &struct v4l2_subdev
219 */
220 void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd);
221
222 #else
223
224 static inline struct v4l2_subdev *
v4l2_i2c_new_subdev(struct v4l2_device * v4l2_dev,struct i2c_adapter * adapter,const char * client_type,u8 addr,const unsigned short * probe_addrs)225 v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
226 struct i2c_adapter *adapter, const char *client_type,
227 u8 addr, const unsigned short *probe_addrs)
228 {
229 return NULL;
230 }
231
232 static inline struct v4l2_subdev *
v4l2_i2c_new_subdev_board(struct v4l2_device * v4l2_dev,struct i2c_adapter * adapter,struct i2c_board_info * info,const unsigned short * probe_addrs)233 v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
234 struct i2c_adapter *adapter, struct i2c_board_info *info,
235 const unsigned short *probe_addrs)
236 {
237 return NULL;
238 }
239
240 static inline void
v4l2_i2c_subdev_set_name(struct v4l2_subdev * sd,struct i2c_client * client,const char * devname,const char * postfix)241 v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client,
242 const char *devname, const char *postfix)
243 {}
244
245 static inline void
v4l2_i2c_subdev_init(struct v4l2_subdev * sd,struct i2c_client * client,const struct v4l2_subdev_ops * ops)246 v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
247 const struct v4l2_subdev_ops *ops)
248 {}
249
v4l2_i2c_subdev_addr(struct v4l2_subdev * sd)250 static inline unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
251 {
252 return I2C_CLIENT_END;
253 }
254
255 static inline const unsigned short *
v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)256 v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
257 {
258 return NULL;
259 }
260
v4l2_i2c_subdev_unregister(struct v4l2_subdev * sd)261 static inline void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd)
262 {}
263
264 #endif
265
266 /* ------------------------------------------------------------------------- */
267
268 /* SPI Helper functions */
269
270 #include <linux/spi/spi.h>
271
272 #if defined(CONFIG_SPI)
273
274 /**
275 * v4l2_spi_new_subdev - Load an spi module and return an initialized
276 * &struct v4l2_subdev.
277 *
278 *
279 * @v4l2_dev: pointer to &struct v4l2_device.
280 * @master: pointer to struct spi_master.
281 * @info: pointer to struct spi_board_info.
282 *
283 * returns a &struct v4l2_subdev pointer.
284 */
285 struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
286 struct spi_master *master, struct spi_board_info *info);
287
288 /**
289 * v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an
290 * spi_device struct.
291 *
292 * @sd: pointer to &struct v4l2_subdev
293 * @spi: pointer to struct spi_device.
294 * @ops: pointer to &struct v4l2_subdev_ops
295 */
296 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
297 const struct v4l2_subdev_ops *ops);
298
299 /**
300 * v4l2_spi_subdev_unregister - Unregister a v4l2_subdev
301 *
302 * @sd: pointer to &struct v4l2_subdev
303 */
304 void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd);
305
306 #else
307
308 static inline struct v4l2_subdev *
v4l2_spi_new_subdev(struct v4l2_device * v4l2_dev,struct spi_master * master,struct spi_board_info * info)309 v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
310 struct spi_master *master, struct spi_board_info *info)
311 {
312 return NULL;
313 }
314
315 static inline void
v4l2_spi_subdev_init(struct v4l2_subdev * sd,struct spi_device * spi,const struct v4l2_subdev_ops * ops)316 v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
317 const struct v4l2_subdev_ops *ops)
318 {}
319
v4l2_spi_subdev_unregister(struct v4l2_subdev * sd)320 static inline void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd)
321 {}
322 #endif
323
324 /* ------------------------------------------------------------------------- */
325
326 /*
327 * FIXME: these remaining ioctls/structs should be removed as well, but they
328 * are still used in tuner-simple.c (TUNER_SET_CONFIG) and cx18/ivtv (RESET).
329 * To remove these ioctls some more cleanup is needed in those modules.
330 *
331 * It doesn't make much sense on documenting them, as what we really want is
332 * to get rid of them.
333 */
334
335 /* s_config */
336 struct v4l2_priv_tun_config {
337 int tuner;
338 void *priv;
339 };
340 #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
341
342 #define VIDIOC_INT_RESET _IOW ('d', 102, u32)
343
344 /* ------------------------------------------------------------------------- */
345
346 /* Miscellaneous helper functions */
347
348 /**
349 * v4l_bound_align_image - adjust video dimensions according to
350 * a given constraints.
351 *
352 * @width: pointer to width that will be adjusted if needed.
353 * @wmin: minimum width.
354 * @wmax: maximum width.
355 * @walign: least significant bit on width.
356 * @height: pointer to height that will be adjusted if needed.
357 * @hmin: minimum height.
358 * @hmax: maximum height.
359 * @halign: least significant bit on height.
360 * @salign: least significant bit for the image size (e. g.
361 * :math:`width * height`).
362 *
363 * Clip an image to have @width between @wmin and @wmax, and @height between
364 * @hmin and @hmax, inclusive.
365 *
366 * Additionally, the @width will be a multiple of :math:`2^{walign}`,
367 * the @height will be a multiple of :math:`2^{halign}`, and the overall
368 * size :math:`width * height` will be a multiple of :math:`2^{salign}`.
369 *
370 * .. note::
371 *
372 * #. The clipping rectangle may be shrunk or enlarged to fit the alignment
373 * constraints.
374 * #. @wmax must not be smaller than @wmin.
375 * #. @hmax must not be smaller than @hmin.
376 * #. The alignments must not be so high there are no possible image
377 * sizes within the allowed bounds.
378 * #. @wmin and @hmin must be at least 1 (don't use 0).
379 * #. For @walign, @halign and @salign, if you don't care about a certain
380 * alignment, specify ``0``, as :math:`2^0 = 1` and one byte alignment
381 * is equivalent to no alignment.
382 * #. If you only want to adjust downward, specify a maximum that's the
383 * same as the initial value.
384 */
385 void v4l_bound_align_image(unsigned int *width, unsigned int wmin,
386 unsigned int wmax, unsigned int walign,
387 unsigned int *height, unsigned int hmin,
388 unsigned int hmax, unsigned int halign,
389 unsigned int salign);
390
391 /**
392 * v4l2_find_nearest_size - Find the nearest size among a discrete
393 * set of resolutions contained in an array of a driver specific struct.
394 *
395 * @array: a driver specific array of image sizes
396 * @array_size: the length of the driver specific array of image sizes
397 * @width_field: the name of the width field in the driver specific struct
398 * @height_field: the name of the height field in the driver specific struct
399 * @width: desired width.
400 * @height: desired height.
401 *
402 * Finds the closest resolution to minimize the width and height differences
403 * between what requested and the supported resolutions. The size of the width
404 * and height fields in the driver specific must equal to that of u32, i.e. four
405 * bytes.
406 *
407 * Returns the best match or NULL if the length of the array is zero.
408 */
409 #define v4l2_find_nearest_size(array, array_size, width_field, height_field, \
410 width, height) \
411 ({ \
412 BUILD_BUG_ON(sizeof((array)->width_field) != sizeof(u32) || \
413 sizeof((array)->height_field) != sizeof(u32)); \
414 (typeof(&(array)[0]))__v4l2_find_nearest_size( \
415 (array), array_size, sizeof(*(array)), \
416 offsetof(typeof(*(array)), width_field), \
417 offsetof(typeof(*(array)), height_field), \
418 width, height); \
419 })
420 const void *
421 __v4l2_find_nearest_size(const void *array, size_t array_size,
422 size_t entry_size, size_t width_offset,
423 size_t height_offset, s32 width, s32 height);
424
425 /**
426 * v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by
427 * calling the g_frame_interval op of the given subdev. It only works
428 * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
429 * function name.
430 *
431 * @vdev: the struct video_device pointer. Used to determine the device caps.
432 * @sd: the sub-device pointer.
433 * @a: the VIDIOC_G_PARM argument.
434 */
435 int v4l2_g_parm_cap(struct video_device *vdev,
436 struct v4l2_subdev *sd, struct v4l2_streamparm *a);
437
438 /**
439 * v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by
440 * calling the s_frame_interval op of the given subdev. It only works
441 * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
442 * function name.
443 *
444 * @vdev: the struct video_device pointer. Used to determine the device caps.
445 * @sd: the sub-device pointer.
446 * @a: the VIDIOC_S_PARM argument.
447 */
448 int v4l2_s_parm_cap(struct video_device *vdev,
449 struct v4l2_subdev *sd, struct v4l2_streamparm *a);
450
451 /* Compare two v4l2_fract structs */
452 #define V4L2_FRACT_COMPARE(a, OP, b) \
453 ((u64)(a).numerator * (b).denominator OP \
454 (u64)(b).numerator * (a).denominator)
455
456 /* ------------------------------------------------------------------------- */
457
458 /* Pixel format and FourCC helpers */
459
460 /**
461 * enum v4l2_pixel_encoding - specifies the pixel encoding value
462 *
463 * @V4L2_PIXEL_ENC_UNKNOWN: Pixel encoding is unknown/un-initialized
464 * @V4L2_PIXEL_ENC_YUV: Pixel encoding is YUV
465 * @V4L2_PIXEL_ENC_RGB: Pixel encoding is RGB
466 * @V4L2_PIXEL_ENC_BAYER: Pixel encoding is Bayer
467 */
468 enum v4l2_pixel_encoding {
469 V4L2_PIXEL_ENC_UNKNOWN = 0,
470 V4L2_PIXEL_ENC_YUV = 1,
471 V4L2_PIXEL_ENC_RGB = 2,
472 V4L2_PIXEL_ENC_BAYER = 3,
473 };
474
475 /**
476 * struct v4l2_format_info - information about a V4L2 format
477 * @format: 4CC format identifier (V4L2_PIX_FMT_*)
478 * @pixel_enc: Pixel encoding (see enum v4l2_pixel_encoding above)
479 * @mem_planes: Number of memory planes, which includes the alpha plane (1 to 4).
480 * @comp_planes: Number of component planes, which includes the alpha plane (1 to 4).
481 * @bpp: Array of per-plane bytes per pixel
482 * @hdiv: Horizontal chroma subsampling factor
483 * @vdiv: Vertical chroma subsampling factor
484 * @block_w: Per-plane macroblock pixel width (optional)
485 * @block_h: Per-plane macroblock pixel height (optional)
486 */
487 struct v4l2_format_info {
488 u32 format;
489 u8 pixel_enc;
490 u8 mem_planes;
491 u8 comp_planes;
492 u8 bpp[4];
493 u8 hdiv;
494 u8 vdiv;
495 u8 block_w[4];
496 u8 block_h[4];
497 };
498
v4l2_is_format_rgb(const struct v4l2_format_info * f)499 static inline bool v4l2_is_format_rgb(const struct v4l2_format_info *f)
500 {
501 return f && f->pixel_enc == V4L2_PIXEL_ENC_RGB;
502 }
503
v4l2_is_format_yuv(const struct v4l2_format_info * f)504 static inline bool v4l2_is_format_yuv(const struct v4l2_format_info *f)
505 {
506 return f && f->pixel_enc == V4L2_PIXEL_ENC_YUV;
507 }
508
v4l2_is_format_bayer(const struct v4l2_format_info * f)509 static inline bool v4l2_is_format_bayer(const struct v4l2_format_info *f)
510 {
511 return f && f->pixel_enc == V4L2_PIXEL_ENC_BAYER;
512 }
513
514 const struct v4l2_format_info *v4l2_format_info(u32 format);
515 void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
516 const struct v4l2_frmsize_stepwise *frmsize);
517 int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
518 u32 width, u32 height);
519 int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
520 u32 width, u32 height);
521
v4l2_buffer_get_timestamp(const struct v4l2_buffer * buf)522 static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf)
523 {
524 /*
525 * When the timestamp comes from 32-bit user space, there may be
526 * uninitialized data in tv_usec, so cast it to u32.
527 * Otherwise allow invalid input for backwards compatibility.
528 */
529 return buf->timestamp.tv_sec * NSEC_PER_SEC +
530 (u32)buf->timestamp.tv_usec * NSEC_PER_USEC;
531 }
532
v4l2_buffer_set_timestamp(struct v4l2_buffer * buf,u64 timestamp)533 static inline void v4l2_buffer_set_timestamp(struct v4l2_buffer *buf,
534 u64 timestamp)
535 {
536 struct timespec64 ts = ns_to_timespec64(timestamp);
537
538 buf->timestamp.tv_sec = ts.tv_sec;
539 buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
540 }
541
v4l2_is_colorspace_valid(__u32 colorspace)542 static inline bool v4l2_is_colorspace_valid(__u32 colorspace)
543 {
544 return colorspace > V4L2_COLORSPACE_DEFAULT &&
545 colorspace <= V4L2_COLORSPACE_DCI_P3;
546 }
547
v4l2_is_xfer_func_valid(__u32 xfer_func)548 static inline bool v4l2_is_xfer_func_valid(__u32 xfer_func)
549 {
550 return xfer_func > V4L2_XFER_FUNC_DEFAULT &&
551 xfer_func <= V4L2_XFER_FUNC_SMPTE2084;
552 }
553
v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc)554 static inline bool v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc)
555 {
556 return ycbcr_enc > V4L2_YCBCR_ENC_DEFAULT &&
557 ycbcr_enc <= V4L2_YCBCR_ENC_SMPTE240M;
558 }
559
v4l2_is_hsv_enc_valid(__u8 hsv_enc)560 static inline bool v4l2_is_hsv_enc_valid(__u8 hsv_enc)
561 {
562 return hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256;
563 }
564
v4l2_is_quant_valid(__u8 quantization)565 static inline bool v4l2_is_quant_valid(__u8 quantization)
566 {
567 return quantization == V4L2_QUANTIZATION_FULL_RANGE ||
568 quantization == V4L2_QUANTIZATION_LIM_RANGE;
569 }
570
571 #endif /* V4L2_COMMON_H_ */
572
