LCOV - code coverage report
Current view: top level - drivers/media/v4l2-core - v4l2-common.c (source / functions) Hit Total Coverage
Test: Real Lines: 0 126 0.0 %
Date: 2020-10-17 15:46:16 Functions: 0 9 0.0 %
Legend: Neither, QEMU, Real, Both Branches: 0 0 -

           Branch data     Line data    Source code
       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/pgtable.h>
      45                 :            : #include <asm/io.h>
      46                 :            : #include <asm/div64.h>
      47                 :            : #include <media/v4l2-common.h>
      48                 :            : #include <media/v4l2-device.h>
      49                 :            : #include <media/v4l2-ctrls.h>
      50                 :            : 
      51                 :            : #include <linux/videodev2.h>
      52                 :            : 
      53                 :            : /*
      54                 :            :  *
      55                 :            :  *      V 4 L 2   D R I V E R   H E L P E R   A P I
      56                 :            :  *
      57                 :            :  */
      58                 :            : 
      59                 :            : /*
      60                 :            :  *  Video Standard Operations (contributed by Michael Schimek)
      61                 :            :  */
      62                 :            : 
      63                 :            : /* Helper functions for control handling                             */
      64                 :            : 
      65                 :            : /* Fill in a struct v4l2_queryctrl */
      66                 :          0 : int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 _min, s32 _max, s32 _step, s32 _def)
      67                 :            : {
      68                 :            :         const char *name;
      69                 :          0 :         s64 min = _min;
      70                 :          0 :         s64 max = _max;
      71                 :          0 :         u64 step = _step;
      72                 :          0 :         s64 def = _def;
      73                 :            : 
      74                 :          0 :         v4l2_ctrl_fill(qctrl->id, &name, &qctrl->type,
      75                 :          0 :                        &min, &max, &step, &def, &qctrl->flags);
      76                 :            : 
      77                 :          0 :         if (name == NULL)
      78                 :            :                 return -EINVAL;
      79                 :            : 
      80                 :          0 :         qctrl->minimum = min;
      81                 :          0 :         qctrl->maximum = max;
      82                 :          0 :         qctrl->step = step;
      83                 :          0 :         qctrl->default_value = def;
      84                 :          0 :         qctrl->reserved[0] = qctrl->reserved[1] = 0;
      85                 :          0 :         strscpy(qctrl->name, name, sizeof(qctrl->name));
      86                 :          0 :         return 0;
      87                 :            : }
      88                 :            : EXPORT_SYMBOL(v4l2_ctrl_query_fill);
      89                 :            : 
      90                 :            : /* Clamp x to be between min and max, aligned to a multiple of 2^align.  min
      91                 :            :  * and max don't have to be aligned, but there must be at least one valid
      92                 :            :  * value.  E.g., min=17,max=31,align=4 is not allowed as there are no multiples
      93                 :            :  * of 16 between 17 and 31.  */
      94                 :            : static unsigned int clamp_align(unsigned int x, unsigned int min,
      95                 :            :                                 unsigned int max, unsigned int align)
      96                 :            : {
      97                 :            :         /* Bits that must be zero to be aligned */
      98                 :          0 :         unsigned int mask = ~((1 << align) - 1);
      99                 :            : 
     100                 :            :         /* Clamp to aligned min and max */
     101                 :          0 :         x = clamp(x, (min + ~mask) & mask, max & mask);
     102                 :            : 
     103                 :            :         /* Round to nearest aligned value */
     104                 :          0 :         if (align)
     105                 :          0 :                 x = (x + (1 << (align - 1))) & mask;
     106                 :            : 
     107                 :            :         return x;
     108                 :            : }
     109                 :            : 
     110                 :            : static unsigned int clamp_roundup(unsigned int x, unsigned int min,
     111                 :            :                                    unsigned int max, unsigned int alignment)
     112                 :            : {
     113                 :          0 :         x = clamp(x, min, max);
     114                 :          0 :         if (alignment)
     115                 :          0 :                 x = round_up(x, alignment);
     116                 :            : 
     117                 :            :         return x;
     118                 :            : }
     119                 :            : 
     120                 :          0 : void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
     121                 :            :                            unsigned int walign,
     122                 :            :                            u32 *h, unsigned int hmin, unsigned int hmax,
     123                 :            :                            unsigned int halign, unsigned int salign)
     124                 :            : {
     125                 :          0 :         *w = clamp_align(*w, wmin, wmax, walign);
     126                 :          0 :         *h = clamp_align(*h, hmin, hmax, halign);
     127                 :            : 
     128                 :            :         /* Usually we don't need to align the size and are done now. */
     129                 :          0 :         if (!salign)
     130                 :          0 :                 return;
     131                 :            : 
     132                 :            :         /* How much alignment do we have? */
     133                 :          0 :         walign = __ffs(*w);
     134                 :            :         halign = __ffs(*h);
     135                 :            :         /* Enough to satisfy the image alignment? */
     136                 :          0 :         if (walign + halign < salign) {
     137                 :            :                 /* Max walign where there is still a valid width */
     138                 :          0 :                 unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
     139                 :            :                 /* Max halign where there is still a valid height */
     140                 :          0 :                 unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
     141                 :            : 
     142                 :            :                 /* up the smaller alignment until we have enough */
     143                 :            :                 do {
     144                 :          0 :                         if (halign >= hmaxa ||
     145                 :          0 :                             (walign <= halign && walign < wmaxa)) {
     146                 :          0 :                                 *w = clamp_align(*w, wmin, wmax, walign + 1);
     147                 :          0 :                                 walign = __ffs(*w);
     148                 :            :                         } else {
     149                 :          0 :                                 *h = clamp_align(*h, hmin, hmax, halign + 1);
     150                 :            :                                 halign = __ffs(*h);
     151                 :            :                         }
     152                 :          0 :                 } while (halign + walign < salign);
     153                 :            :         }
     154                 :            : }
     155                 :            : EXPORT_SYMBOL_GPL(v4l_bound_align_image);
     156                 :            : 
     157                 :            : const void *
     158                 :          0 : __v4l2_find_nearest_size(const void *array, size_t array_size,
     159                 :            :                          size_t entry_size, size_t width_offset,
     160                 :            :                          size_t height_offset, s32 width, s32 height)
     161                 :            : {
     162                 :            :         u32 error, min_error = U32_MAX;
     163                 :            :         const void *best = NULL;
     164                 :            :         unsigned int i;
     165                 :            : 
     166                 :          0 :         if (!array)
     167                 :            :                 return NULL;
     168                 :            : 
     169                 :          0 :         for (i = 0; i < array_size; i++, array += entry_size) {
     170                 :          0 :                 const u32 *entry_width = array + width_offset;
     171                 :          0 :                 const u32 *entry_height = array + height_offset;
     172                 :            : 
     173                 :          0 :                 error = abs(*entry_width - width) + abs(*entry_height - height);
     174                 :          0 :                 if (error > min_error)
     175                 :          0 :                         continue;
     176                 :            : 
     177                 :            :                 min_error = error;
     178                 :            :                 best = array;
     179                 :          0 :                 if (!error)
     180                 :            :                         break;
     181                 :            :         }
     182                 :            : 
     183                 :          0 :         return best;
     184                 :            : }
     185                 :            : EXPORT_SYMBOL_GPL(__v4l2_find_nearest_size);
     186                 :            : 
     187                 :          0 : int v4l2_g_parm_cap(struct video_device *vdev,
     188                 :            :                     struct v4l2_subdev *sd, struct v4l2_streamparm *a)
     189                 :            : {
     190                 :          0 :         struct v4l2_subdev_frame_interval ival = { 0 };
     191                 :            :         int ret;
     192                 :            : 
     193                 :          0 :         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
     194                 :            :             a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
     195                 :            :                 return -EINVAL;
     196                 :            : 
     197                 :          0 :         if (vdev->device_caps & V4L2_CAP_READWRITE)
     198                 :          0 :                 a->parm.capture.readbuffers = 2;
     199                 :          0 :         if (v4l2_subdev_has_op(sd, video, g_frame_interval))
     200                 :          0 :                 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
     201                 :          0 :         ret = v4l2_subdev_call(sd, video, g_frame_interval, &ival);
     202                 :          0 :         if (!ret)
     203                 :          0 :                 a->parm.capture.timeperframe = ival.interval;
     204                 :          0 :         return ret;
     205                 :            : }
     206                 :            : EXPORT_SYMBOL_GPL(v4l2_g_parm_cap);
     207                 :            : 
     208                 :          0 : int v4l2_s_parm_cap(struct video_device *vdev,
     209                 :            :                     struct v4l2_subdev *sd, struct v4l2_streamparm *a)
     210                 :            : {
     211                 :          0 :         struct v4l2_subdev_frame_interval ival = {
     212                 :            :                 .interval = a->parm.capture.timeperframe
     213                 :            :         };
     214                 :            :         int ret;
     215                 :            : 
     216                 :          0 :         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
     217                 :            :             a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
     218                 :            :                 return -EINVAL;
     219                 :            : 
     220                 :          0 :         memset(&a->parm, 0, sizeof(a->parm));
     221                 :          0 :         if (vdev->device_caps & V4L2_CAP_READWRITE)
     222                 :          0 :                 a->parm.capture.readbuffers = 2;
     223                 :            :         else
     224                 :          0 :                 a->parm.capture.readbuffers = 0;
     225                 :            : 
     226                 :          0 :         if (v4l2_subdev_has_op(sd, video, g_frame_interval))
     227                 :          0 :                 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
     228                 :          0 :         ret = v4l2_subdev_call(sd, video, s_frame_interval, &ival);
     229                 :          0 :         if (!ret)
     230                 :          0 :                 a->parm.capture.timeperframe = ival.interval;
     231                 :          0 :         return ret;
     232                 :            : }
     233                 :            : EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
     234                 :            : 
     235                 :          0 : const struct v4l2_format_info *v4l2_format_info(u32 format)
     236                 :            : {
     237                 :            :         static const struct v4l2_format_info formats[] = {
     238                 :            :                 /* RGB formats */
     239                 :            :                 { .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 },
     240                 :            :                 { .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 },
     241                 :            :                 { .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 },
     242                 :            :                 { .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 },
     243                 :            :                 { .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 },
     244                 :            :                 { .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 },
     245                 :            :                 { .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 },
     246                 :            :                 { .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 },
     247                 :            :                 { .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 },
     248                 :            :                 { .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 },
     249                 :            :                 { .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 },
     250                 :            :                 { .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 },
     251                 :            :                 { .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 },
     252                 :            :                 { .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 },
     253                 :            :                 { .format = V4L2_PIX_FMT_GREY,    .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
     254                 :            :                 { .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 },
     255                 :            :                 { .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 },
     256                 :            : 
     257                 :            :                 /* YUV packed formats */
     258                 :            :                 { .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 },
     259                 :            :                 { .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 },
     260                 :            :                 { .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 },
     261                 :            :                 { .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 },
     262                 :            : 
     263                 :            :                 /* YUV planar formats */
     264                 :            :                 { .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 },
     265                 :            :                 { .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 },
     266                 :            :                 { .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 },
     267                 :            :                 { .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 },
     268                 :            :                 { .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 },
     269                 :            :                 { .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 },
     270                 :            : 
     271                 :            :                 { .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 },
     272                 :            :                 { .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 },
     273                 :            :                 { .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 },
     274                 :            :                 { .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 },
     275                 :            :                 { .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 },
     276                 :            :                 { .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 },
     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                 :          0 :         for (i = 0; i < ARRAY_SIZE(formats); ++i)
     316                 :          0 :                 if (formats[i].format == format)
     317                 :          0 :                         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                 :          0 :         if (!info->block_w[plane])
     325                 :            :                 return 1;
     326                 :          0 :         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                 :          0 :         if (!info->block_h[plane])
     332                 :            :                 return 1;
     333                 :          0 :         return info->block_h[plane];
     334                 :            : }
     335                 :            : 
     336                 :          0 : void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
     337                 :            :                                     const struct v4l2_frmsize_stepwise *frmsize)
     338                 :            : {
     339                 :          0 :         if (!frmsize)
     340                 :          0 :                 return;
     341                 :            : 
     342                 :            :         /*
     343                 :            :          * Clamp width/height to meet min/max constraints and round it up to
     344                 :            :          * macroblock alignment.
     345                 :            :          */
     346                 :          0 :         *width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
     347                 :            :                                frmsize->step_width);
     348                 :          0 :         *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                 :          0 : 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                 :          0 :         if (!info)
     362                 :            :                 return -EINVAL;
     363                 :            : 
     364                 :          0 :         pixfmt->width = width;
     365                 :          0 :         pixfmt->height = height;
     366                 :          0 :         pixfmt->pixelformat = pixelformat;
     367                 :          0 :         pixfmt->num_planes = info->mem_planes;
     368                 :            : 
     369                 :          0 :         if (info->mem_planes == 1) {
     370                 :            :                 plane = &pixfmt->plane_fmt[0];
     371                 :          0 :                 plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
     372                 :          0 :                 plane->sizeimage = 0;
     373                 :            : 
     374                 :          0 :                 for (i = 0; i < info->comp_planes; i++) {
     375                 :          0 :                         unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
     376                 :          0 :                         unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
     377                 :            :                         unsigned int aligned_width;
     378                 :            :                         unsigned int aligned_height;
     379                 :            : 
     380                 :          0 :                         aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
     381                 :          0 :                         aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
     382                 :            : 
     383                 :          0 :                         plane->sizeimage += info->bpp[i] *
     384                 :          0 :                                 DIV_ROUND_UP(aligned_width, hdiv) *
     385                 :          0 :                                 DIV_ROUND_UP(aligned_height, vdiv);
     386                 :            :                 }
     387                 :            :         } else {
     388                 :          0 :                 for (i = 0; i < info->comp_planes; i++) {
     389                 :          0 :                         unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
     390                 :          0 :                         unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
     391                 :            :                         unsigned int aligned_width;
     392                 :            :                         unsigned int aligned_height;
     393                 :            : 
     394                 :          0 :                         aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
     395                 :          0 :                         aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
     396                 :            : 
     397                 :            :                         plane = &pixfmt->plane_fmt[i];
     398                 :          0 :                         plane->bytesperline =
     399                 :          0 :                                 info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
     400                 :          0 :                         plane->sizeimage =
     401                 :          0 :                                 plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
     402                 :            :                 }
     403                 :            :         }
     404                 :            :         return 0;
     405                 :            : }
     406                 :            : EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
     407                 :            : 
     408                 :          0 : 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                 :          0 :         if (!info)
     416                 :            :                 return -EINVAL;
     417                 :            : 
     418                 :            :         /* Single planar API cannot be used for multi plane formats. */
     419                 :          0 :         if (info->mem_planes > 1)
     420                 :            :                 return -EINVAL;
     421                 :            : 
     422                 :          0 :         pixfmt->width = width;
     423                 :          0 :         pixfmt->height = height;
     424                 :          0 :         pixfmt->pixelformat = pixelformat;
     425                 :          0 :         pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
     426                 :          0 :         pixfmt->sizeimage = 0;
     427                 :            : 
     428                 :          0 :         for (i = 0; i < info->comp_planes; i++) {
     429                 :          0 :                 unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
     430                 :          0 :                 unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
     431                 :            :                 unsigned int aligned_width;
     432                 :            :                 unsigned int aligned_height;
     433                 :            : 
     434                 :          0 :                 aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
     435                 :          0 :                 aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
     436                 :            : 
     437                 :          0 :                 pixfmt->sizeimage += info->bpp[i] *
     438                 :          0 :                         DIV_ROUND_UP(aligned_width, hdiv) *
     439                 :          0 :                         DIV_ROUND_UP(aligned_height, vdiv);
     440                 :            :         }
     441                 :            :         return 0;
     442                 :            : }
     443                 :            : EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
    

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