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/component.h>
   9 #include <linux/module.h>
  10 #include <linux/mod_devicetable.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/v4l2-mediabus.h>
  13 #include <linux/vmalloc.h>
  14 #include <media/v4l2-ctrls.h>
  15 #include <media/v4l2-event.h>
  16 #include <media/v4l2-subdev.h>
  17 #include <media/tpg/v4l2-tpg.h>
  18
  19 #include "vimc-common.h"
  20
  21 #define VIMC_SEN_DRV_NAME "vimc-sensor"
  22
  23 struct vimc_sen_device {
  24         struct vimc_ent_device ved;
  25         struct v4l2_subdev sd;
  26         struct device *dev;
  27         struct tpg_data tpg;
  28         struct task_struct *kthread_sen;
  29         u8 *frame;
  30         /* The active format */
  31         struct v4l2_mbus_framefmt mbus_format;
  32         struct v4l2_ctrl_handler hdl;
  33 };
  34
  35 static const struct v4l2_mbus_framefmt fmt_default = {
  36         .width = 640,
  37         .height = 480,
  38         .code = MEDIA_BUS_FMT_RGB888_1X24,
  39         .field = V4L2_FIELD_NONE,
  40         .colorspace = V4L2_COLORSPACE_DEFAULT,
  41 };
  42
  43 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
  44                              struct v4l2_subdev_pad_config *cfg)
  45 {
  46         unsigned int i;
  47
  48         for (i = 0; i < sd->entity.num_pads; i++) {
  49                 struct v4l2_mbus_framefmt *mf;
  50
  51                 mf = v4l2_subdev_get_try_format(sd, cfg, i);
  52                 *mf = fmt_default;
  53         }
  54
  55         return 0;
  56 }
  57
  58 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
  59                                     struct v4l2_subdev_pad_config *cfg,
  60                                     struct v4l2_subdev_frame_size_enum *fse)
  61 {
  62         if (fse->index)
  63                 return -EINVAL;
  64
  65         fse->min_width = VIMC_FRAME_MIN_WIDTH;
  66         fse->max_width = VIMC_FRAME_MAX_WIDTH;
  67         fse->min_height = VIMC_FRAME_MIN_HEIGHT;
  68         fse->max_height = VIMC_FRAME_MAX_HEIGHT;
  69
  70         return 0;
  71 }
  72
  73 static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
  74                             struct v4l2_subdev_pad_config *cfg,
  75                             struct v4l2_subdev_format *fmt)
  76 {
  77         struct vimc_sen_device *vsen =
  78                                 container_of(sd, struct vimc_sen_device, sd);
  79
  80         fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
  81                       *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
  82                       vsen->mbus_format;
  83
  84         return 0;
  85 }
  86
  87 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
  88 {
  89         u32 pixelformat = vsen->ved.stream->producer_pixfmt;
  90         const struct v4l2_format_info *pix_info;
  91
  92         pix_info = v4l2_format_info(pixelformat);
  93
  94         tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
  95                          vsen->mbus_format.height, vsen->mbus_format.field);
  96         tpg_s_bytesperline(&vsen->tpg, 0,
  97                            vsen->mbus_format.width * pix_info->bpp[0]);
  98         tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
  99         tpg_s_fourcc(&vsen->tpg, pixelformat);
 100         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 101         tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
 102         tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
 103         tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
 104         tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
 105         tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
 106 }
 107
 108 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
 109 {
 110         fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
 111                              VIMC_FRAME_MAX_WIDTH) & ~1;
 112         fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
 113                               VIMC_FRAME_MAX_HEIGHT) & ~1;
 114
 115         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 116         if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
 117                 fmt->field = fmt_default.field;
 118
 119         vimc_colorimetry_clamp(fmt);
 120 }
 121
 122 static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
 123                             struct v4l2_subdev_pad_config *cfg,
 124                             struct v4l2_subdev_format *fmt)
 125 {
 126         struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
 127         struct v4l2_mbus_framefmt *mf;
 128
 129         if (!vimc_mbus_code_supported(fmt->format.code))
 130                 fmt->format.code = fmt_default.code;
 131
 132         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 133                 /* Do not change the format while stream is on */
 134                 if (vsen->frame)
 135                         return -EBUSY;
 136
 137                 mf = &vsen->mbus_format;
 138         } else {
 139                 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
 140         }
 141
 142         /* Set the new format */
 143         vimc_sen_adjust_fmt(&fmt->format);
 144
 145         dev_dbg(vsen->dev, "%s: format update: "
 146                 "old:%dx%d (0x%x, %d, %d, %d, %d) "
 147                 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
 148                 /* old */
 149                 mf->width, mf->height, mf->code,
 150                 mf->colorspace, mf->quantization,
 151                 mf->xfer_func, mf->ycbcr_enc,
 152                 /* new */
 153                 fmt->format.width, fmt->format.height, fmt->format.code,
 154                 fmt->format.colorspace, fmt->format.quantization,
 155                 fmt->format.xfer_func, fmt->format.ycbcr_enc);
 156
 157         *mf = fmt->format;
 158
 159         return 0;
 160 }
 161
 162 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
 163         .init_cfg               = vimc_sen_init_cfg,
 164         .enum_mbus_code         = vimc_enum_mbus_code,
 165         .enum_frame_size        = vimc_sen_enum_frame_size,
 166         .get_fmt                = vimc_sen_get_fmt,
 167         .set_fmt                = vimc_sen_set_fmt,
 168 };
 169
 170 static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
 171                                     const void *sink_frame)
 172 {
 173         struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
 174                                                     ved);
 175
 176         tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
 177         return vsen->frame;
 178 }
 179
 180 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
 181 {
 182         struct vimc_sen_device *vsen =
 183                                 container_of(sd, struct vimc_sen_device, sd);
 184
 185         if (enable) {
 186                 u32 pixelformat = vsen->ved.stream->producer_pixfmt;
 187                 const struct v4l2_format_info *pix_info;
 188                 unsigned int frame_size;
 189
 190                 if (vsen->kthread_sen)
 191                         /* tpg is already executing */
 192                         return 0;
 193
 194                 /* Calculate the frame size */
 195                 pix_info = v4l2_format_info(pixelformat);
 196                 frame_size = vsen->mbus_format.width * pix_info->bpp[0] *
 197                              vsen->mbus_format.height;
 198
 199                 /*
 200                  * Allocate the frame buffer. Use vmalloc to be able to
 201                  * allocate a large amount of memory
 202                  */
 203                 vsen->frame = vmalloc(frame_size);
 204                 if (!vsen->frame)
 205                         return -ENOMEM;
 206
 207                 /* configure the test pattern generator */
 208                 vimc_sen_tpg_s_format(vsen);
 209
 210         } else {
 211
 212                 vfree(vsen->frame);
 213                 vsen->frame = NULL;
 214                 return 0;
 215         }
 216
 217         return 0;
 218 }
 219
 220 static const struct v4l2_subdev_core_ops vimc_sen_core_ops = {
 221         .log_status = v4l2_ctrl_subdev_log_status,
 222         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
 223         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 224 };
 225
 226 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
 227         .s_stream = vimc_sen_s_stream,
 228 };
 229
 230 static const struct v4l2_subdev_ops vimc_sen_ops = {
 231         .core = &vimc_sen_core_ops,
 232         .pad = &vimc_sen_pad_ops,
 233         .video = &vimc_sen_video_ops,
 234 };
 235
 236 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
 237 {
 238         struct vimc_sen_device *vsen =
 239                 container_of(ctrl->handler, struct vimc_sen_device, hdl);
 240
 241         switch (ctrl->id) {
 242         case VIMC_CID_TEST_PATTERN:
 243                 tpg_s_pattern(&vsen->tpg, ctrl->val);
 244                 break;
 245         case V4L2_CID_HFLIP:
 246                 tpg_s_hflip(&vsen->tpg, ctrl->val);
 247                 break;
 248         case V4L2_CID_VFLIP:
 249                 tpg_s_vflip(&vsen->tpg, ctrl->val);
 250                 break;
 251         case V4L2_CID_BRIGHTNESS:
 252                 tpg_s_brightness(&vsen->tpg, ctrl->val);
 253                 break;
 254         case V4L2_CID_CONTRAST:
 255                 tpg_s_contrast(&vsen->tpg, ctrl->val);
 256                 break;
 257         case V4L2_CID_HUE:
 258                 tpg_s_hue(&vsen->tpg, ctrl->val);
 259                 break;
 260         case V4L2_CID_SATURATION:
 261                 tpg_s_saturation(&vsen->tpg, ctrl->val);
 262                 break;
 263         default:
 264                 return -EINVAL;
 265         }
 266         return 0;
 267 }
 268
 269 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
 270         .s_ctrl = vimc_sen_s_ctrl,
 271 };
 272
 273 static void vimc_sen_release(struct v4l2_subdev *sd)
 274 {
 275         struct vimc_sen_device *vsen =
 276                                 container_of(sd, struct vimc_sen_device, sd);
 277
 278         v4l2_ctrl_handler_free(&vsen->hdl);
 279         tpg_free(&vsen->tpg);
 280         kfree(vsen);
 281 }
 282
 283 static const struct v4l2_subdev_internal_ops vimc_sen_int_ops = {
 284         .release = vimc_sen_release,
 285 };
 286
 287 static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
 288                                  void *master_data)
 289 {
 290         struct vimc_ent_device *ved = dev_get_drvdata(comp);
 291         struct vimc_sen_device *vsen =
 292                                 container_of(ved, struct vimc_sen_device, ved);
 293
 294         vimc_ent_sd_unregister(ved, &vsen->sd);
 295 }
 296
 297 /* Image Processing Controls */
 298 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
 299         .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
 300         .id = VIMC_CID_VIMC_CLASS,
 301         .name = "VIMC Controls",
 302         .type = V4L2_CTRL_TYPE_CTRL_CLASS,
 303 };
 304
 305 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
 306         .ops = &vimc_sen_ctrl_ops,
 307         .id = VIMC_CID_TEST_PATTERN,
 308         .name = "Test Pattern",
 309         .type = V4L2_CTRL_TYPE_MENU,
 310         .max = TPG_PAT_NOISE,
 311         .qmenu = tpg_pattern_strings,
 312 };
 313
 314 static int vimc_sen_comp_bind(struct device *comp, struct device *master,
 315                               void *master_data)
 316 {
 317         struct v4l2_device *v4l2_dev = master_data;
 318         struct vimc_platform_data *pdata = comp->platform_data;
 319         struct vimc_sen_device *vsen;
 320         int ret;
 321
 322         /* Allocate the vsen struct */
 323         vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
 324         if (!vsen)
 325                 return -ENOMEM;
 326
 327         v4l2_ctrl_handler_init(&vsen->hdl, 4);
 328
 329         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
 330         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
 331         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 332                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 333         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 334                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 335         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 336                           V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 337         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 338                           V4L2_CID_CONTRAST, 0, 255, 1, 128);
 339         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 340                           V4L2_CID_HUE, -128, 127, 1, 0);
 341         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 342                           V4L2_CID_SATURATION, 0, 255, 1, 128);
 343         vsen->sd.ctrl_handler = &vsen->hdl;
 344         if (vsen->hdl.error) {
 345                 ret = vsen->hdl.error;
 346                 goto err_free_vsen;
 347         }
 348
 349         /* Initialize ved and sd */
 350         ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
 351                                    pdata->entity_name,
 352                                    MEDIA_ENT_F_CAM_SENSOR, 1,
 353                                    (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
 354                                    &vimc_sen_int_ops, &vimc_sen_ops);
 355         if (ret)
 356                 goto err_free_hdl;
 357
 358         vsen->ved.process_frame = vimc_sen_process_frame;
 359         dev_set_drvdata(comp, &vsen->ved);
 360         vsen->dev = comp;
 361
 362         /* Initialize the frame format */
 363         vsen->mbus_format = fmt_default;
 364
 365         /* Initialize the test pattern generator */
 366         tpg_init(&vsen->tpg, vsen->mbus_format.width,
 367                  vsen->mbus_format.height);
 368         ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
 369         if (ret)
 370                 goto err_unregister_ent_sd;
 371
 372         return 0;
 373
 374 err_unregister_ent_sd:
 375         vimc_ent_sd_unregister(&vsen->ved,  &vsen->sd);
 376 err_free_hdl:
 377         v4l2_ctrl_handler_free(&vsen->hdl);
 378 err_free_vsen:
 379         kfree(vsen);
 380
 381         return ret;
 382 }
 383
 384 static const struct component_ops vimc_sen_comp_ops = {
 385         .bind = vimc_sen_comp_bind,
 386         .unbind = vimc_sen_comp_unbind,
 387 };
 388
 389 static int vimc_sen_probe(struct platform_device *pdev)
 390 {
 391         return component_add(&pdev->dev, &vimc_sen_comp_ops);
 392 }
 393
 394 static int vimc_sen_remove(struct platform_device *pdev)
 395 {
 396         component_del(&pdev->dev, &vimc_sen_comp_ops);
 397
 398         return 0;
 399 }
 400
 401 static const struct platform_device_id vimc_sen_driver_ids[] = {
 402         {
 403                 .name           = VIMC_SEN_DRV_NAME,
 404         },
 405         { }
 406 };
 407
 408 static struct platform_driver vimc_sen_pdrv = {
 409         .probe          = vimc_sen_probe,
 410         .remove         = vimc_sen_remove,
 411         .id_table       = vimc_sen_driver_ids,
 412         .driver         = {
 413                 .name   = VIMC_SEN_DRV_NAME,
 414         },
 415 };
 416
 417 module_platform_driver(vimc_sen_pdrv);
 418
 419 MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
 420
 421 MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
 422 MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
 423 MODULE_LICENSE("GPL");