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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * vimc-sensor.c Virtual Media Controller Driver
   4  *
   5  * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
   6  */
   7
   8 #include <linux/v4l2-mediabus.h>
   9 #include <linux/vmalloc.h>
  10 #include <media/v4l2-ctrls.h>
  11 #include <media/v4l2-event.h>
  12 #include <media/v4l2-subdev.h>
  13 #include <media/tpg/v4l2-tpg.h>
  14
  15 #include "vimc-common.h"
  16
  17 struct vimc_sen_device {
  18         struct vimc_ent_device ved;
  19         struct v4l2_subdev sd;
  20         struct tpg_data tpg;
  21         u8 *frame;
  22         /* The active format */
  23         struct v4l2_mbus_framefmt mbus_format;
  24         struct v4l2_ctrl_handler hdl;
  25         struct media_pad pad;
  26 };
  27
  28 static const struct v4l2_mbus_framefmt fmt_default = {
  29         .width = 640,
  30         .height = 480,
  31         .code = MEDIA_BUS_FMT_RGB888_1X24,
  32         .field = V4L2_FIELD_NONE,
  33         .colorspace = V4L2_COLORSPACE_DEFAULT,
  34 };
  35
  36 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
  37                              struct v4l2_subdev_pad_config *cfg)
  38 {
  39         unsigned int i;
  40
  41         for (i = 0; i < sd->entity.num_pads; i++) {
  42                 struct v4l2_mbus_framefmt *mf;
  43
  44                 mf = v4l2_subdev_get_try_format(sd, cfg, i);
  45                 *mf = fmt_default;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
  52                                    struct v4l2_subdev_pad_config *cfg,
  53                                    struct v4l2_subdev_mbus_code_enum *code)
  54 {
  55         const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
  56
  57         if (!vpix)
  58                 return -EINVAL;
  59
  60         code->code = vpix->code;
  61
  62         return 0;
  63 }
  64
  65 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
  66                                     struct v4l2_subdev_pad_config *cfg,
  67                                     struct v4l2_subdev_frame_size_enum *fse)
  68 {
  69         const struct vimc_pix_map *vpix;
  70
  71         if (fse->index)
  72                 return -EINVAL;
  73
  74         /* Only accept code in the pix map table */
  75         vpix = vimc_pix_map_by_code(fse->code);
  76         if (!vpix)
  77                 return -EINVAL;
  78
  79         fse->min_width = VIMC_FRAME_MIN_WIDTH;
  80         fse->max_width = VIMC_FRAME_MAX_WIDTH;
  81         fse->min_height = VIMC_FRAME_MIN_HEIGHT;
  82         fse->max_height = VIMC_FRAME_MAX_HEIGHT;
  83
  84         return 0;
  85 }
  86
  87 static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
  88                             struct v4l2_subdev_pad_config *cfg,
  89                             struct v4l2_subdev_format *fmt)
  90 {
  91         struct vimc_sen_device *vsen =
  92                                 container_of(sd, struct vimc_sen_device, sd);
  93
  94         fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
  95                       *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
  96                       vsen->mbus_format;
  97
  98         return 0;
  99 }
 100
 101 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
 102 {
 103         const struct vimc_pix_map *vpix =
 104                                 vimc_pix_map_by_code(vsen->mbus_format.code);
 105
 106         tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
 107                          vsen->mbus_format.height, vsen->mbus_format.field);
 108         tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp);
 109         tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
 110         tpg_s_fourcc(&vsen->tpg, vpix->pixelformat);
 111         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 112         tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
 113         tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
 114         tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
 115         tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
 116         tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
 117 }
 118
 119 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
 120 {
 121         const struct vimc_pix_map *vpix;
 122
 123         /* Only accept code in the pix map table */
 124         vpix = vimc_pix_map_by_code(fmt->code);
 125         if (!vpix)
 126                 fmt->code = fmt_default.code;
 127
 128         fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
 129                              VIMC_FRAME_MAX_WIDTH) & ~1;
 130         fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
 131                               VIMC_FRAME_MAX_HEIGHT) & ~1;
 132
 133         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 134         if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
 135                 fmt->field = fmt_default.field;
 136
 137         vimc_colorimetry_clamp(fmt);
 138 }
 139
 140 static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
 141                             struct v4l2_subdev_pad_config *cfg,
 142                             struct v4l2_subdev_format *fmt)
 143 {
 144         struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
 145         struct v4l2_mbus_framefmt *mf;
 146
 147         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 148                 /* Do not change the format while stream is on */
 149                 if (vsen->frame)
 150                         return -EBUSY;
 151
 152                 mf = &vsen->mbus_format;
 153         } else {
 154                 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
 155         }
 156
 157         /* Set the new format */
 158         vimc_sen_adjust_fmt(&fmt->format);
 159
 160         dev_dbg(vsen->ved.dev, "%s: format update: "
 161                 "old:%dx%d (0x%x, %d, %d, %d, %d) "
 162                 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
 163                 /* old */
 164                 mf->width, mf->height, mf->code,
 165                 mf->colorspace, mf->quantization,
 166                 mf->xfer_func, mf->ycbcr_enc,
 167                 /* new */
 168                 fmt->format.width, fmt->format.height, fmt->format.code,
 169                 fmt->format.colorspace, fmt->format.quantization,
 170                 fmt->format.xfer_func, fmt->format.ycbcr_enc);
 171
 172         *mf = fmt->format;
 173
 174         return 0;
 175 }
 176
 177 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
 178         .init_cfg               = vimc_sen_init_cfg,
 179         .enum_mbus_code         = vimc_sen_enum_mbus_code,
 180         .enum_frame_size        = vimc_sen_enum_frame_size,
 181         .get_fmt                = vimc_sen_get_fmt,
 182         .set_fmt                = vimc_sen_set_fmt,
 183 };
 184
 185 static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
 186                                     const void *sink_frame)
 187 {
 188         struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
 189                                                     ved);
 190
 191         tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
 192         return vsen->frame;
 193 }
 194
 195 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
 196 {
 197         struct vimc_sen_device *vsen =
 198                                 container_of(sd, struct vimc_sen_device, sd);
 199
 200         if (enable) {
 201                 const struct vimc_pix_map *vpix;
 202                 unsigned int frame_size;
 203
 204                 /* Calculate the frame size */
 205                 vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
 206                 frame_size = vsen->mbus_format.width * vpix->bpp *
 207                              vsen->mbus_format.height;
 208
 209                 /*
 210                  * Allocate the frame buffer. Use vmalloc to be able to
 211                  * allocate a large amount of memory
 212                  */
 213                 vsen->frame = vmalloc(frame_size);
 214                 if (!vsen->frame)
 215                         return -ENOMEM;
 216
 217                 /* configure the test pattern generator */
 218                 vimc_sen_tpg_s_format(vsen);
 219
 220         } else {
 221
 222                 vfree(vsen->frame);
 223                 vsen->frame = NULL;
 224         }
 225
 226         return 0;
 227 }
 228
 229 static const struct v4l2_subdev_core_ops vimc_sen_core_ops = {
 230         .log_status = v4l2_ctrl_subdev_log_status,
 231         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
 232         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 233 };
 234
 235 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
 236         .s_stream = vimc_sen_s_stream,
 237 };
 238
 239 static const struct v4l2_subdev_ops vimc_sen_ops = {
 240         .core = &vimc_sen_core_ops,
 241         .pad = &vimc_sen_pad_ops,
 242         .video = &vimc_sen_video_ops,
 243 };
 244
 245 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
 246 {
 247         struct vimc_sen_device *vsen =
 248                 container_of(ctrl->handler, struct vimc_sen_device, hdl);
 249
 250         switch (ctrl->id) {
 251         case VIMC_CID_TEST_PATTERN:
 252                 tpg_s_pattern(&vsen->tpg, ctrl->val);
 253                 break;
 254         case V4L2_CID_HFLIP:
 255                 tpg_s_hflip(&vsen->tpg, ctrl->val);
 256                 break;
 257         case V4L2_CID_VFLIP:
 258                 tpg_s_vflip(&vsen->tpg, ctrl->val);
 259                 break;
 260         case V4L2_CID_BRIGHTNESS:
 261                 tpg_s_brightness(&vsen->tpg, ctrl->val);
 262                 break;
 263         case V4L2_CID_CONTRAST:
 264                 tpg_s_contrast(&vsen->tpg, ctrl->val);
 265                 break;
 266         case V4L2_CID_HUE:
 267                 tpg_s_hue(&vsen->tpg, ctrl->val);
 268                 break;
 269         case V4L2_CID_SATURATION:
 270                 tpg_s_saturation(&vsen->tpg, ctrl->val);
 271                 break;
 272         default:
 273                 return -EINVAL;
 274         }
 275         return 0;
 276 }
 277
 278 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
 279         .s_ctrl = vimc_sen_s_ctrl,
 280 };
 281
 282 static void vimc_sen_release(struct v4l2_subdev *sd)
 283 {
 284         struct vimc_sen_device *vsen =
 285                                 container_of(sd, struct vimc_sen_device, sd);
 286
 287         v4l2_ctrl_handler_free(&vsen->hdl);
 288         tpg_free(&vsen->tpg);
 289         media_entity_cleanup(vsen->ved.ent);
 290         kfree(vsen);
 291 }
 292
 293 static const struct v4l2_subdev_internal_ops vimc_sen_int_ops = {
 294         .release = vimc_sen_release,
 295 };
 296
 297 void vimc_sen_rm(struct vimc_device *vimc, struct vimc_ent_device *ved)
 298 {
 299         struct vimc_sen_device *vsen;
 300
 301         vsen = container_of(ved, struct vimc_sen_device, ved);
 302         v4l2_device_unregister_subdev(&vsen->sd);
 303 }
 304
 305 /* Image Processing Controls */
 306 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
 307         .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
 308         .id = VIMC_CID_VIMC_CLASS,
 309         .name = "VIMC Controls",
 310         .type = V4L2_CTRL_TYPE_CTRL_CLASS,
 311 };
 312
 313 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
 314         .ops = &vimc_sen_ctrl_ops,
 315         .id = VIMC_CID_TEST_PATTERN,
 316         .name = "Test Pattern",
 317         .type = V4L2_CTRL_TYPE_MENU,
 318         .max = TPG_PAT_NOISE,
 319         .qmenu = tpg_pattern_strings,
 320 };
 321
 322 struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 323                                      const char *vcfg_name)
 324 {
 325         struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
 326         struct vimc_sen_device *vsen;
 327         int ret;
 328
 329         /* Allocate the vsen struct */
 330         vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
 331         if (!vsen)
 332                 return NULL;
 333
 334         v4l2_ctrl_handler_init(&vsen->hdl, 4);
 335
 336         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
 337         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
 338         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 339                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 340         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 341                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 342         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 343                           V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 344         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 345                           V4L2_CID_CONTRAST, 0, 255, 1, 128);
 346         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 347                           V4L2_CID_HUE, -128, 127, 1, 0);
 348         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 349                           V4L2_CID_SATURATION, 0, 255, 1, 128);
 350         vsen->sd.ctrl_handler = &vsen->hdl;
 351         if (vsen->hdl.error) {
 352                 ret = vsen->hdl.error;
 353                 goto err_free_vsen;
 354         }
 355
 356         /* Initialize the test pattern generator */
 357         tpg_init(&vsen->tpg, vsen->mbus_format.width,
 358                  vsen->mbus_format.height);
 359         ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
 360         if (ret)
 361                 goto err_free_hdl;
 362
 363         /* Initialize ved and sd */
 364         vsen->pad.flags = MEDIA_PAD_FL_SOURCE;
 365         ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
 366                                    vcfg_name,
 367                                    MEDIA_ENT_F_CAM_SENSOR, 1, &vsen->pad,
 368                                    &vimc_sen_int_ops, &vimc_sen_ops);
 369         if (ret)
 370                 goto err_free_tpg;
 371
 372         vsen->ved.process_frame = vimc_sen_process_frame;
 373         vsen->ved.dev = &vimc->pdev.dev;
 374
 375         /* Initialize the frame format */
 376         vsen->mbus_format = fmt_default;
 377
 378         return &vsen->ved;
 379
 380 err_free_tpg:
 381         tpg_free(&vsen->tpg);
 382 err_free_hdl:
 383         v4l2_ctrl_handler_free(&vsen->hdl);
 384 err_free_vsen:
 385         kfree(vsen);
 386
 387         return NULL;
 388 }