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 enum vimc_sen_osd_mode { 18 VIMC_SEN_OSD_SHOW_ALL = 0, 19 VIMC_SEN_OSD_SHOW_COUNTERS = 1, 20 VIMC_SEN_OSD_SHOW_NONE = 2 21 }; 22 23 struct vimc_sen_device { 24 struct vimc_ent_device ved; 25 struct v4l2_subdev sd; 26 struct tpg_data tpg; 27 u8 *frame; 28 enum vimc_sen_osd_mode osd_value; 29 u64 start_stream_ts; 30 /* The active format */ 31 struct v4l2_mbus_framefmt mbus_format; 32 struct v4l2_ctrl_handler hdl; 33 struct media_pad pad; 34 }; 35 36 static const struct v4l2_mbus_framefmt fmt_default = { 37 .width = 640, 38 .height = 480, 39 .code = MEDIA_BUS_FMT_RGB888_1X24, 40 .field = V4L2_FIELD_NONE, 41 .colorspace = V4L2_COLORSPACE_SRGB, 42 }; 43 44 static int vimc_sen_init_cfg(struct v4l2_subdev *sd, 45 struct v4l2_subdev_state *sd_state) 46 { 47 unsigned int i; 48 49 for (i = 0; i < sd->entity.num_pads; i++) { 50 struct v4l2_mbus_framefmt *mf; 51 52 mf = v4l2_subdev_get_try_format(sd, sd_state, i); 53 *mf = fmt_default; 54 } 55 56 return 0; 57 } 58 59 static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd, 60 struct v4l2_subdev_state *sd_state, 61 struct v4l2_subdev_mbus_code_enum *code) 62 { 63 u32 mbus_code = vimc_mbus_code_by_index(code->index); 64 65 if (!mbus_code) 66 return -EINVAL; 67 68 code->code = mbus_code; 69 70 return 0; 71 } 72 73 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd, 74 struct v4l2_subdev_state *sd_state, 75 struct v4l2_subdev_frame_size_enum *fse) 76 { 77 const struct vimc_pix_map *vpix; 78 79 if (fse->index) 80 return -EINVAL; 81 82 /* Only accept code in the pix map table */ 83 vpix = vimc_pix_map_by_code(fse->code); 84 if (!vpix) 85 return -EINVAL; 86 87 fse->min_width = VIMC_FRAME_MIN_WIDTH; 88 fse->max_width = VIMC_FRAME_MAX_WIDTH; 89 fse->min_height = VIMC_FRAME_MIN_HEIGHT; 90 fse->max_height = VIMC_FRAME_MAX_HEIGHT; 91 92 return 0; 93 } 94 95 static int vimc_sen_get_fmt(struct v4l2_subdev *sd, 96 struct v4l2_subdev_state *sd_state, 97 struct v4l2_subdev_format *fmt) 98 { 99 struct vimc_sen_device *vsen = 100 container_of(sd, struct vimc_sen_device, sd); 101 102 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ? 103 *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) : 104 vsen->mbus_format; 105 106 return 0; 107 } 108 109 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen) 110 { 111 const struct vimc_pix_map *vpix = 112 vimc_pix_map_by_code(vsen->mbus_format.code); 113 114 tpg_reset_source(&vsen->tpg, vsen->mbus_format.width, 115 vsen->mbus_format.height, vsen->mbus_format.field); 116 tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp); 117 tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height); 118 tpg_s_fourcc(&vsen->tpg, vpix->pixelformat); 119 /* TODO: add support for V4L2_FIELD_ALTERNATE */ 120 tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false); 121 tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace); 122 tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc); 123 tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization); 124 tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func); 125 } 126 127 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt) 128 { 129 const struct vimc_pix_map *vpix; 130 131 /* Only accept code in the pix map table */ 132 vpix = vimc_pix_map_by_code(fmt->code); 133 if (!vpix) 134 fmt->code = fmt_default.code; 135 136 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH, 137 VIMC_FRAME_MAX_WIDTH) & ~1; 138 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT, 139 VIMC_FRAME_MAX_HEIGHT) & ~1; 140 141 /* TODO: add support for V4L2_FIELD_ALTERNATE */ 142 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE) 143 fmt->field = fmt_default.field; 144 145 vimc_colorimetry_clamp(fmt); 146 } 147 148 static int vimc_sen_set_fmt(struct v4l2_subdev *sd, 149 struct v4l2_subdev_state *sd_state, 150 struct v4l2_subdev_format *fmt) 151 { 152 struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd); 153 struct v4l2_mbus_framefmt *mf; 154 155 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 156 /* Do not change the format while stream is on */ 157 if (vsen->frame) 158 return -EBUSY; 159 160 mf = &vsen->mbus_format; 161 } else { 162 mf = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); 163 } 164 165 /* Set the new format */ 166 vimc_sen_adjust_fmt(&fmt->format); 167 168 dev_dbg(vsen->ved.dev, "%s: format update: " 169 "old:%dx%d (0x%x, %d, %d, %d, %d) " 170 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name, 171 /* old */ 172 mf->width, mf->height, mf->code, 173 mf->colorspace, mf->quantization, 174 mf->xfer_func, mf->ycbcr_enc, 175 /* new */ 176 fmt->format.width, fmt->format.height, fmt->format.code, 177 fmt->format.colorspace, fmt->format.quantization, 178 fmt->format.xfer_func, fmt->format.ycbcr_enc); 179 180 *mf = fmt->format; 181 182 return 0; 183 } 184 185 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = { 186 .init_cfg = vimc_sen_init_cfg, 187 .enum_mbus_code = vimc_sen_enum_mbus_code, 188 .enum_frame_size = vimc_sen_enum_frame_size, 189 .get_fmt = vimc_sen_get_fmt, 190 .set_fmt = vimc_sen_set_fmt, 191 }; 192 193 static void *vimc_sen_process_frame(struct vimc_ent_device *ved, 194 const void *sink_frame) 195 { 196 struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device, 197 ved); 198 const unsigned int line_height = 16; 199 u8 *basep[TPG_MAX_PLANES][2]; 200 unsigned int line = 1; 201 char str[100]; 202 203 tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame); 204 tpg_calc_text_basep(&vsen->tpg, basep, 0, vsen->frame); 205 switch (vsen->osd_value) { 206 case VIMC_SEN_OSD_SHOW_ALL: { 207 const char *order = tpg_g_color_order(&vsen->tpg); 208 209 tpg_gen_text(&vsen->tpg, basep, line++ * line_height, 210 16, order); 211 snprintf(str, sizeof(str), 212 "brightness %3d, contrast %3d, saturation %3d, hue %d ", 213 vsen->tpg.brightness, 214 vsen->tpg.contrast, 215 vsen->tpg.saturation, 216 vsen->tpg.hue); 217 tpg_gen_text(&vsen->tpg, basep, line++ * line_height, 16, str); 218 snprintf(str, sizeof(str), "sensor size: %dx%d", 219 vsen->mbus_format.width, 220 vsen->mbus_format.height); 221 tpg_gen_text(&vsen->tpg, basep, line++ * line_height, 16, str); 222 fallthrough; 223 } 224 case VIMC_SEN_OSD_SHOW_COUNTERS: { 225 unsigned int ms; 226 227 ms = div_u64(ktime_get_ns() - vsen->start_stream_ts, 1000000); 228 snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d", 229 (ms / (60 * 60 * 1000)) % 24, 230 (ms / (60 * 1000)) % 60, 231 (ms / 1000) % 60, 232 ms % 1000); 233 tpg_gen_text(&vsen->tpg, basep, line++ * line_height, 16, str); 234 break; 235 } 236 case VIMC_SEN_OSD_SHOW_NONE: 237 default: 238 break; 239 } 240 241 return vsen->frame; 242 } 243 244 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable) 245 { 246 struct vimc_sen_device *vsen = 247 container_of(sd, struct vimc_sen_device, sd); 248 249 if (enable) { 250 const struct vimc_pix_map *vpix; 251 unsigned int frame_size; 252 253 vsen->start_stream_ts = ktime_get_ns(); 254 255 /* Calculate the frame size */ 256 vpix = vimc_pix_map_by_code(vsen->mbus_format.code); 257 frame_size = vsen->mbus_format.width * vpix->bpp * 258 vsen->mbus_format.height; 259 260 /* 261 * Allocate the frame buffer. Use vmalloc to be able to 262 * allocate a large amount of memory 263 */ 264 vsen->frame = vmalloc(frame_size); 265 if (!vsen->frame) 266 return -ENOMEM; 267 268 /* configure the test pattern generator */ 269 vimc_sen_tpg_s_format(vsen); 270 271 } else { 272 273 vfree(vsen->frame); 274 vsen->frame = NULL; 275 } 276 277 return 0; 278 } 279 280 static const struct v4l2_subdev_core_ops vimc_sen_core_ops = { 281 .log_status = v4l2_ctrl_subdev_log_status, 282 .subscribe_event = v4l2_ctrl_subdev_subscribe_event, 283 .unsubscribe_event = v4l2_event_subdev_unsubscribe, 284 }; 285 286 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = { 287 .s_stream = vimc_sen_s_stream, 288 }; 289 290 static const struct v4l2_subdev_ops vimc_sen_ops = { 291 .core = &vimc_sen_core_ops, 292 .pad = &vimc_sen_pad_ops, 293 .video = &vimc_sen_video_ops, 294 }; 295 296 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl) 297 { 298 struct vimc_sen_device *vsen = 299 container_of(ctrl->handler, struct vimc_sen_device, hdl); 300 301 switch (ctrl->id) { 302 case VIMC_CID_TEST_PATTERN: 303 tpg_s_pattern(&vsen->tpg, ctrl->val); 304 break; 305 case V4L2_CID_HFLIP: 306 tpg_s_hflip(&vsen->tpg, ctrl->val); 307 break; 308 case V4L2_CID_VFLIP: 309 tpg_s_vflip(&vsen->tpg, ctrl->val); 310 break; 311 case V4L2_CID_BRIGHTNESS: 312 tpg_s_brightness(&vsen->tpg, ctrl->val); 313 break; 314 case V4L2_CID_CONTRAST: 315 tpg_s_contrast(&vsen->tpg, ctrl->val); 316 break; 317 case V4L2_CID_HUE: 318 tpg_s_hue(&vsen->tpg, ctrl->val); 319 break; 320 case V4L2_CID_SATURATION: 321 tpg_s_saturation(&vsen->tpg, ctrl->val); 322 break; 323 case VIMC_CID_OSD_TEXT_MODE: 324 vsen->osd_value = ctrl->val; 325 break; 326 default: 327 return -EINVAL; 328 } 329 return 0; 330 } 331 332 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = { 333 .s_ctrl = vimc_sen_s_ctrl, 334 }; 335 336 static void vimc_sen_release(struct vimc_ent_device *ved) 337 { 338 struct vimc_sen_device *vsen = 339 container_of(ved, struct vimc_sen_device, ved); 340 341 v4l2_ctrl_handler_free(&vsen->hdl); 342 tpg_free(&vsen->tpg); 343 media_entity_cleanup(vsen->ved.ent); 344 kfree(vsen); 345 } 346 347 /* Image Processing Controls */ 348 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = { 349 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY, 350 .id = VIMC_CID_VIMC_CLASS, 351 .name = "VIMC Controls", 352 .type = V4L2_CTRL_TYPE_CTRL_CLASS, 353 }; 354 355 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = { 356 .ops = &vimc_sen_ctrl_ops, 357 .id = VIMC_CID_TEST_PATTERN, 358 .name = "Test Pattern", 359 .type = V4L2_CTRL_TYPE_MENU, 360 .max = TPG_PAT_NOISE, 361 .qmenu = tpg_pattern_strings, 362 }; 363 364 static const char * const vimc_ctrl_osd_mode_strings[] = { 365 "All", 366 "Counters Only", 367 "None", 368 NULL, 369 }; 370 371 static const struct v4l2_ctrl_config vimc_sen_ctrl_osd_mode = { 372 .ops = &vimc_sen_ctrl_ops, 373 .id = VIMC_CID_OSD_TEXT_MODE, 374 .name = "Show Information", 375 .type = V4L2_CTRL_TYPE_MENU, 376 .max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2, 377 .qmenu = vimc_ctrl_osd_mode_strings, 378 }; 379 380 static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc, 381 const char *vcfg_name) 382 { 383 struct v4l2_device *v4l2_dev = &vimc->v4l2_dev; 384 struct vimc_sen_device *vsen; 385 int ret; 386 387 /* Allocate the vsen struct */ 388 vsen = kzalloc(sizeof(*vsen), GFP_KERNEL); 389 if (!vsen) 390 return ERR_PTR(-ENOMEM); 391 392 v4l2_ctrl_handler_init(&vsen->hdl, 4); 393 394 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL); 395 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL); 396 v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_osd_mode, NULL); 397 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 398 V4L2_CID_VFLIP, 0, 1, 1, 0); 399 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 400 V4L2_CID_HFLIP, 0, 1, 1, 0); 401 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 402 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 403 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 404 V4L2_CID_CONTRAST, 0, 255, 1, 128); 405 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 406 V4L2_CID_HUE, -128, 127, 1, 0); 407 v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops, 408 V4L2_CID_SATURATION, 0, 255, 1, 128); 409 vsen->sd.ctrl_handler = &vsen->hdl; 410 if (vsen->hdl.error) { 411 ret = vsen->hdl.error; 412 goto err_free_vsen; 413 } 414 415 /* Initialize the test pattern generator */ 416 tpg_init(&vsen->tpg, vsen->mbus_format.width, 417 vsen->mbus_format.height); 418 ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH); 419 if (ret) 420 goto err_free_hdl; 421 422 /* Initialize ved and sd */ 423 vsen->pad.flags = MEDIA_PAD_FL_SOURCE; 424 ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev, 425 vcfg_name, 426 MEDIA_ENT_F_CAM_SENSOR, 1, &vsen->pad, 427 &vimc_sen_ops); 428 if (ret) 429 goto err_free_tpg; 430 431 vsen->ved.process_frame = vimc_sen_process_frame; 432 vsen->ved.dev = vimc->mdev.dev; 433 434 /* Initialize the frame format */ 435 vsen->mbus_format = fmt_default; 436 437 return &vsen->ved; 438 439 err_free_tpg: 440 tpg_free(&vsen->tpg); 441 err_free_hdl: 442 v4l2_ctrl_handler_free(&vsen->hdl); 443 err_free_vsen: 444 kfree(vsen); 445 446 return ERR_PTR(ret); 447 } 448 449 struct vimc_ent_type vimc_sen_type = { 450 .add = vimc_sen_add, 451 .release = vimc_sen_release 452 }; 453