drivers/media/platform/vimc/vimc-common.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * vimc-common.c Virtual Media Controller Driver
   4  *
   5  * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/module.h>
  10
  11 #include "vimc-common.h"
  12
  13 /*
  14  * NOTE: non-bayer formats need to come first (necessary for enum_mbus_code
  15  * in the scaler)
  16  */
  17 static const struct vimc_pix_map vimc_pix_map_list[] = {
  18         /* TODO: add all missing formats */
  19
  20         /* RGB formats */
  21         {
  22                 .code = MEDIA_BUS_FMT_BGR888_1X24,
  23                 .pixelformat = V4L2_PIX_FMT_BGR24,
  24                 .bpp = 3,
  25                 .bayer = false,
  26         },
  27         {
  28                 .code = MEDIA_BUS_FMT_RGB888_1X24,
  29                 .pixelformat = V4L2_PIX_FMT_RGB24,
  30                 .bpp = 3,
  31                 .bayer = false,
  32         },
  33         {
  34                 .code = MEDIA_BUS_FMT_ARGB8888_1X32,
  35                 .pixelformat = V4L2_PIX_FMT_ARGB32,
  36                 .bpp = 4,
  37                 .bayer = false,
  38         },
  39
  40         /* Bayer formats */
  41         {
  42                 .code = MEDIA_BUS_FMT_SBGGR8_1X8,
  43                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
  44                 .bpp = 1,
  45                 .bayer = true,
  46         },
  47         {
  48                 .code = MEDIA_BUS_FMT_SGBRG8_1X8,
  49                 .pixelformat = V4L2_PIX_FMT_SGBRG8,
  50                 .bpp = 1,
  51                 .bayer = true,
  52         },
  53         {
  54                 .code = MEDIA_BUS_FMT_SGRBG8_1X8,
  55                 .pixelformat = V4L2_PIX_FMT_SGRBG8,
  56                 .bpp = 1,
  57                 .bayer = true,
  58         },
  59         {
  60                 .code = MEDIA_BUS_FMT_SRGGB8_1X8,
  61                 .pixelformat = V4L2_PIX_FMT_SRGGB8,
  62                 .bpp = 1,
  63                 .bayer = true,
  64         },
  65         {
  66                 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
  67                 .pixelformat = V4L2_PIX_FMT_SBGGR10,
  68                 .bpp = 2,
  69                 .bayer = true,
  70         },
  71         {
  72                 .code = MEDIA_BUS_FMT_SGBRG10_1X10,
  73                 .pixelformat = V4L2_PIX_FMT_SGBRG10,
  74                 .bpp = 2,
  75                 .bayer = true,
  76         },
  77         {
  78                 .code = MEDIA_BUS_FMT_SGRBG10_1X10,
  79                 .pixelformat = V4L2_PIX_FMT_SGRBG10,
  80                 .bpp = 2,
  81                 .bayer = true,
  82         },
  83         {
  84                 .code = MEDIA_BUS_FMT_SRGGB10_1X10,
  85                 .pixelformat = V4L2_PIX_FMT_SRGGB10,
  86                 .bpp = 2,
  87                 .bayer = true,
  88         },
  89
  90         /* 10bit raw bayer a-law compressed to 8 bits */
  91         {
  92                 .code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8,
  93                 .pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
  94                 .bpp = 1,
  95                 .bayer = true,
  96         },
  97         {
  98                 .code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8,
  99                 .pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
 100                 .bpp = 1,
 101                 .bayer = true,
 102         },
 103         {
 104                 .code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
 105                 .pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
 106                 .bpp = 1,
 107                 .bayer = true,
 108         },
 109         {
 110                 .code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8,
 111                 .pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
 112                 .bpp = 1,
 113                 .bayer = true,
 114         },
 115
 116         /* 10bit raw bayer DPCM compressed to 8 bits */
 117         {
 118                 .code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
 119                 .pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
 120                 .bpp = 1,
 121                 .bayer = true,
 122         },
 123         {
 124                 .code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
 125                 .pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
 126                 .bpp = 1,
 127                 .bayer = true,
 128         },
 129         {
 130                 .code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
 131                 .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
 132                 .bpp = 1,
 133                 .bayer = true,
 134         },
 135         {
 136                 .code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
 137                 .pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
 138                 .bpp = 1,
 139                 .bayer = true,
 140         },
 141         {
 142                 .code = MEDIA_BUS_FMT_SBGGR12_1X12,
 143                 .pixelformat = V4L2_PIX_FMT_SBGGR12,
 144                 .bpp = 2,
 145                 .bayer = true,
 146         },
 147         {
 148                 .code = MEDIA_BUS_FMT_SGBRG12_1X12,
 149                 .pixelformat = V4L2_PIX_FMT_SGBRG12,
 150                 .bpp = 2,
 151                 .bayer = true,
 152         },
 153         {
 154                 .code = MEDIA_BUS_FMT_SGRBG12_1X12,
 155                 .pixelformat = V4L2_PIX_FMT_SGRBG12,
 156                 .bpp = 2,
 157                 .bayer = true,
 158         },
 159         {
 160                 .code = MEDIA_BUS_FMT_SRGGB12_1X12,
 161                 .pixelformat = V4L2_PIX_FMT_SRGGB12,
 162                 .bpp = 2,
 163                 .bayer = true,
 164         },
 165 };
 166
 167 bool vimc_is_source(struct media_entity *ent)
 168 {
 169         unsigned int i;
 170
 171         for (i = 0; i < ent->num_pads; i++)
 172                 if (ent->pads[i].flags & MEDIA_PAD_FL_SINK)
 173                         return false;
 174         return true;
 175 }
 176
 177 const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
 178 {
 179         if (i >= ARRAY_SIZE(vimc_pix_map_list))
 180                 return NULL;
 181
 182         return &vimc_pix_map_list[i];
 183 }
 184
 185 const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
 186 {
 187         unsigned int i;
 188
 189         for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
 190                 if (vimc_pix_map_list[i].code == code)
 191                         return &vimc_pix_map_list[i];
 192         }
 193         return NULL;
 194 }
 195
 196 const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat)
 197 {
 198         unsigned int i;
 199
 200         for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
 201                 if (vimc_pix_map_list[i].pixelformat == pixelformat)
 202                         return &vimc_pix_map_list[i];
 203         }
 204         return NULL;
 205 }
 206
 207 static int vimc_get_pix_format(struct media_pad *pad,
 208                                struct v4l2_pix_format *fmt)
 209 {
 210         if (is_media_entity_v4l2_subdev(pad->entity)) {
 211                 struct v4l2_subdev *sd =
 212                         media_entity_to_v4l2_subdev(pad->entity);
 213                 struct v4l2_subdev_format sd_fmt;
 214                 const struct vimc_pix_map *pix_map;
 215                 int ret;
 216
 217                 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 218                 sd_fmt.pad = pad->index;
 219
 220                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sd_fmt);
 221                 if (ret)
 222                         return ret;
 223
 224                 v4l2_fill_pix_format(fmt, &sd_fmt.format);
 225                 pix_map = vimc_pix_map_by_code(sd_fmt.format.code);
 226                 fmt->pixelformat = pix_map->pixelformat;
 227         } else if (is_media_entity_v4l2_video_device(pad->entity)) {
 228                 struct video_device *vdev = container_of(pad->entity,
 229                                                          struct video_device,
 230                                                          entity);
 231                 struct vimc_ent_device *ved = video_get_drvdata(vdev);
 232
 233                 if (!ved->vdev_get_format)
 234                         return -ENOIOCTLCMD;
 235
 236                 ved->vdev_get_format(ved, fmt);
 237         } else {
 238                 return -EINVAL;
 239         }
 240
 241         return 0;
 242 }
 243
 244 int vimc_vdev_link_validate(struct media_link *link)
 245 {
 246         struct v4l2_pix_format source_fmt, sink_fmt;
 247         int ret;
 248
 249         ret = vimc_get_pix_format(link->source, &source_fmt);
 250         if (ret)
 251                 return ret;
 252
 253         ret = vimc_get_pix_format(link->sink, &sink_fmt);
 254         if (ret)
 255                 return ret;
 256
 257         pr_info("vimc link validate: "
 258                 "%s:src:%dx%d (0x%x, %d, %d, %d, %d) "
 259                 "%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n",
 260                 /* src */
 261                 link->source->entity->name,
 262                 source_fmt.width, source_fmt.height,
 263                 source_fmt.pixelformat, source_fmt.colorspace,
 264                 source_fmt.quantization, source_fmt.xfer_func,
 265                 source_fmt.ycbcr_enc,
 266                 /* sink */
 267                 link->sink->entity->name,
 268                 sink_fmt.width, sink_fmt.height,
 269                 sink_fmt.pixelformat, sink_fmt.colorspace,
 270                 sink_fmt.quantization, sink_fmt.xfer_func,
 271                 sink_fmt.ycbcr_enc);
 272
 273         /* The width, height and pixelformat must match. */
 274         if (source_fmt.width != sink_fmt.width ||
 275             source_fmt.height != sink_fmt.height ||
 276             source_fmt.pixelformat != sink_fmt.pixelformat)
 277                 return -EPIPE;
 278
 279         /*
 280          * The field order must match, or the sink field order must be NONE
 281          * to support interlaced hardware connected to bridges that support
 282          * progressive formats only.
 283          */
 284         if (source_fmt.field != sink_fmt.field &&
 285             sink_fmt.field != V4L2_FIELD_NONE)
 286                 return -EPIPE;
 287
 288         /*
 289          * If colorspace is DEFAULT, then assume all the colorimetry is also
 290          * DEFAULT, return 0 to skip comparing the other colorimetry parameters
 291          */
 292         if (source_fmt.colorspace == V4L2_COLORSPACE_DEFAULT ||
 293             sink_fmt.colorspace == V4L2_COLORSPACE_DEFAULT)
 294                 return 0;
 295
 296         /* Colorspace must match. */
 297         if (source_fmt.colorspace != sink_fmt.colorspace)
 298                 return -EPIPE;
 299
 300         /* Colorimetry must match if they are not set to DEFAULT */
 301         if (source_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
 302             sink_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
 303             source_fmt.ycbcr_enc != sink_fmt.ycbcr_enc)
 304                 return -EPIPE;
 305
 306         if (source_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
 307             sink_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
 308             source_fmt.quantization != sink_fmt.quantization)
 309                 return -EPIPE;
 310
 311         if (source_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
 312             sink_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
 313             source_fmt.xfer_func != sink_fmt.xfer_func)
 314                 return -EPIPE;
 315
 316         return 0;
 317 }
 318
 319 static const struct media_entity_operations vimc_ent_sd_mops = {
 320         .link_validate = v4l2_subdev_link_validate,
 321 };
 322
 323 int vimc_ent_sd_register(struct vimc_ent_device *ved,
 324                          struct v4l2_subdev *sd,
 325                          struct v4l2_device *v4l2_dev,
 326                          const char *const name,
 327                          u32 function,
 328                          u16 num_pads,
 329                          struct media_pad *pads,
 330                          const struct v4l2_subdev_ops *sd_ops)
 331 {
 332         int ret;
 333
 334         /* Fill the vimc_ent_device struct */
 335         ved->ent = &sd->entity;
 336
 337         /* Initialize the subdev */
 338         v4l2_subdev_init(sd, sd_ops);
 339         sd->entity.function = function;
 340         sd->entity.ops = &vimc_ent_sd_mops;
 341         sd->owner = THIS_MODULE;
 342         strscpy(sd->name, name, sizeof(sd->name));
 343         v4l2_set_subdevdata(sd, ved);
 344
 345         /* Expose this subdev to user space */
 346         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 347         if (sd->ctrl_handler)
 348                 sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
 349
 350         /* Initialize the media entity */
 351         ret = media_entity_pads_init(&sd->entity, num_pads, pads);
 352         if (ret)
 353                 return ret;
 354
 355         /* Register the subdev with the v4l2 and the media framework */
 356         ret = v4l2_device_register_subdev(v4l2_dev, sd);
 357         if (ret) {
 358                 dev_err(v4l2_dev->dev,
 359                         "%s: subdev register failed (err=%d)\n",
 360                         name, ret);
 361                 goto err_clean_m_ent;
 362         }
 363
 364         return 0;
 365
 366 err_clean_m_ent:
 367         media_entity_cleanup(&sd->entity);
 368         return ret;
 369 }