include/media/v4l2-common.h

   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 *
 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 *
 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
 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
 246 v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 247                      const struct v4l2_subdev_ops *ops)
 248 {}
 249
 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 *
 256 v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
 257 {
 258         return NULL;
 259 }
 260
 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 *
 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
 316 v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
 317                      const struct v4l2_subdev_ops *ops)
 318 {}
 319
 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
 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
 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
 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
 522 /**
 523  * v4l2_get_link_rate - Get link rate from transmitter
 524  *
 525  * @handler: The transmitter's control handler
 526  * @mul: The multiplier between pixel rate and link frequency. Bits per pixel on
 527  *       D-PHY, samples per clock on parallel. 0 otherwise.
 528  * @div: The divisor between pixel rate and link frequency. Number of data lanes
 529  *       times two on D-PHY, 1 on parallel. 0 otherwise.
 530  *
 531  * This function is intended for obtaining the link frequency from the
 532  * transmitter sub-devices. It returns the link rate, either from the
 533  * V4L2_CID_LINK_FREQ control implemented by the transmitter, or value
 534  * calculated based on the V4L2_CID_PIXEL_RATE implemented by the transmitter.
 535  *
 536  * Returns link frequency on success, otherwise a negative error code:
 537  *      -ENOENT: Link frequency or pixel rate control not found
 538  *      -EINVAL: Invalid link frequency value
 539  */
 540 s64 v4l2_get_link_rate(struct v4l2_ctrl_handler *handler, unsigned int mul,
 541                        unsigned int div);
 542
 543 static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf)
 544 {
 545         /*
 546          * When the timestamp comes from 32-bit user space, there may be
 547          * uninitialized data in tv_usec, so cast it to u32.
 548          * Otherwise allow invalid input for backwards compatibility.
 549          */
 550         return buf->timestamp.tv_sec * NSEC_PER_SEC +
 551                 (u32)buf->timestamp.tv_usec * NSEC_PER_USEC;
 552 }
 553
 554 static inline void v4l2_buffer_set_timestamp(struct v4l2_buffer *buf,
 555                                              u64 timestamp)
 556 {
 557         struct timespec64 ts = ns_to_timespec64(timestamp);
 558
 559         buf->timestamp.tv_sec  = ts.tv_sec;
 560         buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 561 }
 562
 563 static inline bool v4l2_is_colorspace_valid(__u32 colorspace)
 564 {
 565         return colorspace > V4L2_COLORSPACE_DEFAULT &&
 566                colorspace <= V4L2_COLORSPACE_DCI_P3;
 567 }
 568
 569 static inline bool v4l2_is_xfer_func_valid(__u32 xfer_func)
 570 {
 571         return xfer_func > V4L2_XFER_FUNC_DEFAULT &&
 572                xfer_func <= V4L2_XFER_FUNC_SMPTE2084;
 573 }
 574
 575 static inline bool v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc)
 576 {
 577         return ycbcr_enc > V4L2_YCBCR_ENC_DEFAULT &&
 578                ycbcr_enc <= V4L2_YCBCR_ENC_SMPTE240M;
 579 }
 580
 581 static inline bool v4l2_is_hsv_enc_valid(__u8 hsv_enc)
 582 {
 583         return hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256;
 584 }
 585
 586 static inline bool v4l2_is_quant_valid(__u8 quantization)
 587 {
 588         return quantization == V4L2_QUANTIZATION_FULL_RANGE ||
 589                quantization == V4L2_QUANTIZATION_LIM_RANGE;
 590 }
 591
 592 #endif /* V4L2_COMMON_H_ */