drivers/media/v4l2-core/v4l2-common.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      Video for Linux Two
   4  *
   5  *      A generic video device interface for the LINUX operating system
   6  *      using a set of device structures/vectors for low level operations.
   7  *
   8  *      This file replaces the videodev.c file that comes with the
   9  *      regular kernel distribution.
  10  *
  11  * Author:      Bill Dirks <bill@thedirks.org>
  12  *              based on code by Alan Cox, <alan@cymru.net>
  13  */
  14
  15 /*
  16  * Video capture interface for Linux
  17  *
  18  *      A generic video device interface for the LINUX operating system
  19  *      using a set of device structures/vectors for low level operations.
  20  *
  21  * Author:      Alan Cox, <alan@lxorguk.ukuu.org.uk>
  22  *
  23  * Fixes:
  24  */
  25
  26 /*
  27  * Video4linux 1/2 integration by Justin Schoeman
  28  * <justin@suntiger.ee.up.ac.za>
  29  * 2.4 PROCFS support ported from 2.4 kernels by
  30  *  Iñaki García Etxebarria <garetxe@euskalnet.net>
  31  * Makefile fix by "W. Michael Petullo" <mike@flyn.org>
  32  * 2.4 devfs support ported from 2.4 kernels by
  33  *  Dan Merillat <dan@merillat.org>
  34  * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
  35  */
  36
  37 #include <linux/module.h>
  38 #include <linux/types.h>
  39 #include <linux/kernel.h>
  40 #include <linux/mm.h>
  41 #include <linux/string.h>
  42 #include <linux/errno.h>
  43 #include <linux/uaccess.h>
  44 #include <asm/io.h>
  45 #include <asm/div64.h>
  46 #include <media/v4l2-common.h>
  47 #include <media/v4l2-device.h>
  48 #include <media/v4l2-ctrls.h>
  49
  50 #include <linux/videodev2.h>
  51
  52 /*
  53  *
  54  *      V 4 L 2   D R I V E R   H E L P E R   A P I
  55  *
  56  */
  57
  58 /*
  59  *  Video Standard Operations (contributed by Michael Schimek)
  60  */
  61
  62 /* Helper functions for control handling                             */
  63
  64 /* Fill in a struct v4l2_queryctrl */
  65 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
  66 {
  67         const char *name;
  68         s64 min = _min;
  69         s64 max = _max;
  70         u64 step = _step;
  71         s64 def = _def;
  72
  73         v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
  74                        &min, &max, &step, &def, &qctrl->flags);
  75
  76         if (name == NULL)
  77                 return -EINVAL;
  78
  79         qctrl->minimum = min;
  80         qctrl->maximum = max;
  81         qctrl->step = step;
  82         qctrl->default_value = def;
  83         qctrl->reserved[0] = qctrl->reserved[1] = 0;
  84         strscpy(qctrl->name, name, sizeof(qctrl->name));
  85         return 0;
  86 }
  87 EXPORT_SYMBOL(v4l2_ctrl_query_fill);
  88
  89 /* Clamp x to be between min and max, aligned to a multiple of 2^align.  min
  90  * and max don't have to be aligned, but there must be at least one valid
  91  * value.  E.g., min=17,max=31,align=4 is not allowed as there are no multiples
  92  * of 16 between 17 and 31.  */
  93 static unsigned int clamp_align(unsigned int x, unsigned int min,
  94                                 unsigned int max, unsigned int align)
  95 {
  96         /* Bits that must be zero to be aligned */
  97         unsigned int mask = ~((1 << align) - 1);
  98
  99         /* Clamp to aligned min and max */
 100         x = clamp(x, (min + ~mask) & mask, max & mask);
 101
 102         /* Round to nearest aligned value */
 103         if (align)
 104                 x = (x + (1 << (align - 1))) & mask;
 105
 106         return x;
 107 }
 108
 109 static unsigned int clamp_roundup(unsigned int x, unsigned int min,
 110                                    unsigned int max, unsigned int alignment)
 111 {
 112         x = clamp(x, min, max);
 113         if (alignment)
 114                 x = round_up(x, alignment);
 115
 116         return x;
 117 }
 118
 119 void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
 120                            unsigned int walign,
 121                            u32 *h, unsigned int hmin, unsigned int hmax,
 122                            unsigned int halign, unsigned int salign)
 123 {
 124         *w = clamp_align(*w, wmin, wmax, walign);
 125         *h = clamp_align(*h, hmin, hmax, halign);
 126
 127         /* Usually we don't need to align the size and are done now. */
 128         if (!salign)
 129                 return;
 130
 131         /* How much alignment do we have? */
 132         walign = __ffs(*w);
 133         halign = __ffs(*h);
 134         /* Enough to satisfy the image alignment? */
 135         if (walign + halign < salign) {
 136                 /* Max walign where there is still a valid width */
 137                 unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
 138                 /* Max halign where there is still a valid height */
 139                 unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
 140
 141                 /* up the smaller alignment until we have enough */
 142                 do {
 143                         if (halign >= hmaxa ||
 144                             (walign <= halign && walign < wmaxa)) {
 145                                 *w = clamp_align(*w, wmin, wmax, walign + 1);
 146                                 walign = __ffs(*w);
 147                         } else {
 148                                 *h = clamp_align(*h, hmin, hmax, halign + 1);
 149                                 halign = __ffs(*h);
 150                         }
 151                 } while (halign + walign < salign);
 152         }
 153 }
 154 EXPORT_SYMBOL_GPL(v4l_bound_align_image);
 155
 156 const void *
 157 __v4l2_find_nearest_size(const void *array, size_t array_size,
 158                          size_t entry_size, size_t width_offset,
 159                          size_t height_offset, s32 width, s32 height)
 160 {
 161         u32 error, min_error = U32_MAX;
 162         const void *best = NULL;
 163         unsigned int i;
 164
 165         if (!array)
 166                 return NULL;
 167
 168         for (i = 0; i < array_size; i++, array += entry_size) {
 169                 const u32 *entry_width = array + width_offset;
 170                 const u32 *entry_height = array + height_offset;
 171
 172                 error = abs(*entry_width - width) + abs(*entry_height - height);
 173                 if (error > min_error)
 174                         continue;
 175
 176                 min_error = error;
 177                 best = array;
 178                 if (!error)
 179                         break;
 180         }
 181
 182         return best;
 183 }
 184 EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
 185
 186 int v4l2_g_parm_cap(struct video_device *vdev,
 187                     struct v4l2_subdev *sd, struct v4l2_streamparm *a)
 188 {
 189         struct v4l2_subdev_frame_interval ival = { 0 };
 190         int ret;
 191
 192         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 193             a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 194                 return -EINVAL;
 195
 196         if (vdev->device_caps & V4L2_CAP_READWRITE)
 197                 a->parm.capture.readbuffers = 2;
 198         if (v4l2_subdev_has_op(sd, video, g_frame_interval))
 199                 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 200         ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
 201         if (!ret)
 202                 a->parm.capture.timeperframe = ival.interval;
 203         return ret;
 204 }
 205 EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
 206
 207 int v4l2_s_parm_cap(struct video_device *vdev,
 208                     struct v4l2_subdev *sd, struct v4l2_streamparm *a)
 209 {
 210         struct v4l2_subdev_frame_interval ival = {
 211                 .interval = a->parm.capture.timeperframe
 212         };
 213         int ret;
 214
 215         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 216             a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 217                 return -EINVAL;
 218
 219         memset(&a->parm, 0, sizeof(a->parm));
 220         if (vdev->device_caps & V4L2_CAP_READWRITE)
 221                 a->parm.capture.readbuffers = 2;
 222         else
 223                 a->parm.capture.readbuffers = 0;
 224
 225         if (v4l2_subdev_has_op(sd, video, g_frame_interval))
 226                 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 227         ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
 228         if (!ret)
 229                 a->parm.capture.timeperframe = ival.interval;
 230         return ret;
 231 }
 232 EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
 233
 234 const struct v4l2_format_info *v4l2_format_info(u32 format)
 235 {
 236         static const struct v4l2_format_info formats[] = {
 237                 /* RGB formats */
 238                 { .format = V4L2_PIX_FMT_BGR24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 239                 { .format = V4L2_PIX_FMT_RGB24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 240                 { .format = V4L2_PIX_FMT_HSV24,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 241                 { .format = V4L2_PIX_FMT_BGR32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 242                 { .format = V4L2_PIX_FMT_XBGR32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 243                 { .format = V4L2_PIX_FMT_BGRX32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 244                 { .format = V4L2_PIX_FMT_RGB32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 245                 { .format = V4L2_PIX_FMT_XRGB32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 246                 { .format = V4L2_PIX_FMT_RGBX32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 247                 { .format = V4L2_PIX_FMT_HSV32,   .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 248                 { .format = V4L2_PIX_FMT_ARGB32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 249                 { .format = V4L2_PIX_FMT_RGBA32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 250                 { .format = V4L2_PIX_FMT_ABGR32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 251                 { .format = V4L2_PIX_FMT_BGRA32,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 252                 { .format = V4L2_PIX_FMT_RGB565,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 253                 { .format = V4L2_PIX_FMT_RGB555,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 254                 { .format = V4L2_PIX_FMT_BGR666,  .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 255
 256                 /* YUV packed formats */
 257                 { .format = V4L2_PIX_FMT_YUYV,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 258                 { .format = V4L2_PIX_FMT_YVYU,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 259                 { .format = V4L2_PIX_FMT_UYVY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 260                 { .format = V4L2_PIX_FMT_VYUY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 261
 262                 /* YUV planar formats */
 263                 { .format = V4L2_PIX_FMT_NV12,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 264                 { .format = V4L2_PIX_FMT_NV21,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 265                 { .format = V4L2_PIX_FMT_NV16,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 266                 { .format = V4L2_PIX_FMT_NV61,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 267                 { .format = V4L2_PIX_FMT_NV24,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 268                 { .format = V4L2_PIX_FMT_NV42,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 269
 270                 { .format = V4L2_PIX_FMT_YUV410,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
 271                 { .format = V4L2_PIX_FMT_YVU410,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
 272                 { .format = V4L2_PIX_FMT_YUV411P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 1 },
 273                 { .format = V4L2_PIX_FMT_YUV420,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
 274                 { .format = V4L2_PIX_FMT_YVU420,  .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
 275                 { .format = V4L2_PIX_FMT_YUV422P, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
 276                 { .format = V4L2_PIX_FMT_GREY,    .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 277
 278                 /* YUV planar formats, non contiguous variant */
 279                 { .format = V4L2_PIX_FMT_YUV420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
 280                 { .format = V4L2_PIX_FMT_YVU420M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
 281                 { .format = V4L2_PIX_FMT_YUV422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
 282                 { .format = V4L2_PIX_FMT_YVU422M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
 283                 { .format = V4L2_PIX_FMT_YUV444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
 284                 { .format = V4L2_PIX_FMT_YVU444M, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
 285
 286                 { .format = V4L2_PIX_FMT_NV12M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 287                 { .format = V4L2_PIX_FMT_NV21M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
 288                 { .format = V4L2_PIX_FMT_NV16M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 289                 { .format = V4L2_PIX_FMT_NV61M,   .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
 290
 291                 /* Bayer RGB formats */
 292                 { .format = V4L2_PIX_FMT_SBGGR8,        .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 293                 { .format = V4L2_PIX_FMT_SGBRG8,        .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 294                 { .format = V4L2_PIX_FMT_SGRBG8,        .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 295                 { .format = V4L2_PIX_FMT_SRGGB8,        .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 296                 { .format = V4L2_PIX_FMT_SBGGR10,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 297                 { .format = V4L2_PIX_FMT_SGBRG10,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 298                 { .format = V4L2_PIX_FMT_SGRBG10,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 299                 { .format = V4L2_PIX_FMT_SRGGB10,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 300                 { .format = V4L2_PIX_FMT_SBGGR10ALAW8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 301                 { .format = V4L2_PIX_FMT_SGBRG10ALAW8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 302                 { .format = V4L2_PIX_FMT_SGRBG10ALAW8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 303                 { .format = V4L2_PIX_FMT_SRGGB10ALAW8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 304                 { .format = V4L2_PIX_FMT_SBGGR10DPCM8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 305                 { .format = V4L2_PIX_FMT_SGBRG10DPCM8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 306                 { .format = V4L2_PIX_FMT_SGRBG10DPCM8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 307                 { .format = V4L2_PIX_FMT_SRGGB10DPCM8,  .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 308                 { .format = V4L2_PIX_FMT_SBGGR12,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 309                 { .format = V4L2_PIX_FMT_SGBRG12,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 310                 { .format = V4L2_PIX_FMT_SGRBG12,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 311                 { .format = V4L2_PIX_FMT_SRGGB12,       .pixel_enc = V4L2_PIXEL_ENC_BAYER, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
 312         };
 313         unsigned int i;
 314
 315         for (i = 0; i < ARRAY_SIZE(formats); ++i)
 316                 if (formats[i].format == format)
 317                         return &formats[i];
 318         return NULL;
 319 }
 320 EXPORT_SYMBOL(v4l2_format_info);
 321
 322 static inline unsigned int v4l2_format_block_width(const struct v4l2_format_info *info, int plane)
 323 {
 324         if (!info->block_w[plane])
 325                 return 1;
 326         return info->block_w[plane];
 327 }
 328
 329 static inline unsigned int v4l2_format_block_height(const struct v4l2_format_info *info, int plane)
 330 {
 331         if (!info->block_h[plane])
 332                 return 1;
 333         return info->block_h[plane];
 334 }
 335
 336 void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
 337                                     const struct v4l2_frmsize_stepwise *frmsize)
 338 {
 339         if (!frmsize)
 340                 return;
 341
 342         /*
 343          * Clamp width/height to meet min/max constraints and round it up to
 344          * macroblock alignment.
 345          */
 346         *width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
 347                                frmsize->step_width);
 348         *height = clamp_roundup(*height, frmsize->min_height, frmsize->max_height,
 349                                 frmsize->step_height);
 350 }
 351 EXPORT_SYMBOL_GPL(v4l2_apply_frmsize_constraints);
 352
 353 int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
 354                         u32 pixelformat, u32 width, u32 height)
 355 {
 356         const struct v4l2_format_info *info;
 357         struct v4l2_plane_pix_format *plane;
 358         int i;
 359
 360         info = v4l2_format_info(pixelformat);
 361         if (!info)
 362                 return -EINVAL;
 363
 364         pixfmt->width = width;
 365         pixfmt->height = height;
 366         pixfmt->pixelformat = pixelformat;
 367         pixfmt->num_planes = info->mem_planes;
 368
 369         if (info->mem_planes == 1) {
 370                 plane = &pixfmt->plane_fmt[0];
 371                 plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
 372                 plane->sizeimage = 0;
 373
 374                 for (i = 0; i < info->comp_planes; i++) {
 375                         unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
 376                         unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
 377                         unsigned int aligned_width;
 378                         unsigned int aligned_height;
 379
 380                         aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
 381                         aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
 382
 383                         plane->sizeimage += info->bpp[i] *
 384                                 DIV_ROUND_UP(aligned_width, hdiv) *
 385                                 DIV_ROUND_UP(aligned_height, vdiv);
 386                 }
 387         } else {
 388                 for (i = 0; i < info->comp_planes; i++) {
 389                         unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
 390                         unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
 391                         unsigned int aligned_width;
 392                         unsigned int aligned_height;
 393
 394                         aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
 395                         aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
 396
 397                         plane = &pixfmt->plane_fmt[i];
 398                         plane->bytesperline =
 399                                 info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
 400                         plane->sizeimage =
 401                                 plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
 402                 }
 403         }
 404         return 0;
 405 }
 406 EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
 407
 408 int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
 409                      u32 width, u32 height)
 410 {
 411         const struct v4l2_format_info *info;
 412         int i;
 413
 414         info = v4l2_format_info(pixelformat);
 415         if (!info)
 416                 return -EINVAL;
 417
 418         /* Single planar API cannot be used for multi plane formats. */
 419         if (info->mem_planes > 1)
 420                 return -EINVAL;
 421
 422         pixfmt->width = width;
 423         pixfmt->height = height;
 424         pixfmt->pixelformat = pixelformat;
 425         pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
 426         pixfmt->sizeimage = 0;
 427
 428         for (i = 0; i < info->comp_planes; i++) {
 429                 unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
 430                 unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
 431                 unsigned int aligned_width;
 432                 unsigned int aligned_height;
 433
 434                 aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
 435                 aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
 436
 437                 pixfmt->sizeimage += info->bpp[i] *
 438                         DIV_ROUND_UP(aligned_width, hdiv) *
 439                         DIV_ROUND_UP(aligned_height, vdiv);
 440         }
 441         return 0;
 442 }
 443 EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
 444
 445 s64 v4l2_get_link_rate(struct v4l2_ctrl_handler *handler, unsigned int mul,
 446                        unsigned int div)
 447 {
 448         struct v4l2_ctrl *ctrl;
 449         s64 freq;
 450
 451         ctrl = v4l2_ctrl_find(handler, V4L2_CID_LINK_FREQ);
 452         if (ctrl) {
 453                 struct v4l2_querymenu qm = { .id = V4L2_CID_LINK_FREQ };
 454                 int ret;
 455
 456                 qm.index = v4l2_ctrl_g_ctrl(ctrl);
 457
 458                 ret = v4l2_querymenu(handler, &qm);
 459                 if (ret)
 460                         return -ENOENT;
 461
 462                 freq = qm.value;
 463         } else {
 464                 if (!mul || !div)
 465                         return -ENOENT;
 466
 467                 ctrl = v4l2_ctrl_find(handler, V4L2_CID_PIXEL_RATE);
 468                 if (!ctrl)
 469                         return -ENOENT;
 470
 471                 freq = div_u64(v4l2_ctrl_g_ctrl_int64(ctrl) * mul, div);
 472         }
 473
 474         return freq > 0 ? freq : -EINVAL;
 475 }
 476 EXPORT_SYMBOL_GPL(v4l2_get_link_rate);