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 17enum vimc_sensor_osd_mode { 18 VIMC_SENSOR_OSD_SHOW_ALL = 0, 19 VIMC_SENSOR_OSD_SHOW_COUNTERS = 1, 20 VIMC_SENSOR_OSD_SHOW_NONE = 2 21}; 22 23struct vimc_sensor_device { 24 struct vimc_ent_device ved; 25 struct v4l2_subdev sd; 26 struct tpg_data tpg; 27 u8 *frame; 28 enum vimc_sensor_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 36static 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 44static int vimc_sensor_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 59static int vimc_sensor_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 73static int vimc_sensor_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 95static int vimc_sensor_get_fmt(struct v4l2_subdev *sd, 96 struct v4l2_subdev_state *sd_state, 97 struct v4l2_subdev_format *fmt) 98{ 99 struct vimc_sensor_device *vsensor = 100 container_of(sd, struct vimc_sensor_device, sd); 101 102 fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ? 103 *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) : 104 vsensor->mbus_format; 105 106 return 0; 107} 108 109static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor) 110{ 111 const struct vimc_pix_map *vpix = 112 vimc_pix_map_by_code(vsensor->mbus_format.code); 113 114 tpg_reset_source(&vsensor->tpg, vsensor->mbus_format.width, 115 vsensor->mbus_format.height, vsensor->mbus_format.field); 116 tpg_s_bytesperline(&vsensor->tpg, 0, vsensor->mbus_format.width * vpix->bpp); 117 tpg_s_buf_height(&vsensor->tpg, vsensor->mbus_format.height); 118 tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat); 119 /* TODO: add support for V4L2_FIELD_ALTERNATE */ 120 tpg_s_field(&vsensor->tpg, vsensor->mbus_format.field, false); 121 tpg_s_colorspace(&vsensor->tpg, vsensor->mbus_format.colorspace); 122 tpg_s_ycbcr_enc(&vsensor->tpg, vsensor->mbus_format.ycbcr_enc); 123 tpg_s_quantization(&vsensor->tpg, vsensor->mbus_format.quantization); 124 tpg_s_xfer_func(&vsensor->tpg, vsensor->mbus_format.xfer_func); 125} 126 127static void vimc_sensor_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 148static int vimc_sensor_set_fmt(struct v4l2_subdev *sd, 149 struct v4l2_subdev_state *sd_state, 150 struct v4l2_subdev_format *fmt) 151{ 152 struct vimc_sensor_device *vsensor = 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 (vsensor->frame) 158 return -EBUSY; 159 160 mf = &vsensor->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_sensor_adjust_fmt(&fmt->format); 167 168 dev_dbg(vsensor->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", vsensor->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 185static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = { 186 .init_cfg = vimc_sensor_init_cfg, 187 .enum_mbus_code = vimc_sensor_enum_mbus_code, 188 .enum_frame_size = vimc_sensor_enum_frame_size, 189 .get_fmt = vimc_sensor_get_fmt, 190 .set_fmt = vimc_sensor_set_fmt, 191}; 192 193static void *vimc_sensor_process_frame(struct vimc_ent_device *ved, 194 const void *sink_frame) 195{ 196 struct vimc_sensor_device *vsensor = 197 container_of(ved, struct vimc_sensor_device, ved); 198 199 const unsigned int line_height = 16; 200 u8 *basep[TPG_MAX_PLANES][2]; 201 unsigned int line = 1; 202 char str[100]; 203 204 tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame); 205 tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame); 206 switch (vsensor->osd_value) { 207 case VIMC_SENSOR_OSD_SHOW_ALL: { 208 const char *order = tpg_g_color_order(&vsensor->tpg); 209 210 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 211 16, order); 212 snprintf(str, sizeof(str), 213 "brightness %3d, contrast %3d, saturation %3d, hue %d ", 214 vsensor->tpg.brightness, 215 vsensor->tpg.contrast, 216 vsensor->tpg.saturation, 217 vsensor->tpg.hue); 218 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 219 snprintf(str, sizeof(str), "sensor size: %dx%d", 220 vsensor->mbus_format.width, 221 vsensor->mbus_format.height); 222 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 223 fallthrough; 224 } 225 case VIMC_SENSOR_OSD_SHOW_COUNTERS: { 226 unsigned int ms; 227 228 ms = div_u64(ktime_get_ns() - vsensor->start_stream_ts, 1000000); 229 snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d", 230 (ms / (60 * 60 * 1000)) % 24, 231 (ms / (60 * 1000)) % 60, 232 (ms / 1000) % 60, 233 ms % 1000); 234 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 235 break; 236 } 237 case VIMC_SENSOR_OSD_SHOW_NONE: 238 default: 239 break; 240 } 241 242 return vsensor->frame; 243} 244 245static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int enable) 246{ 247 struct vimc_sensor_device *vsensor = 248 container_of(sd, struct vimc_sensor_device, sd); 249 250 if (enable) { 251 const struct vimc_pix_map *vpix; 252 unsigned int frame_size; 253 254 vsensor->start_stream_ts = ktime_get_ns(); 255 256 /* Calculate the frame size */ 257 vpix = vimc_pix_map_by_code(vsensor->mbus_format.code); 258 frame_size = vsensor->mbus_format.width * vpix->bpp * 259 vsensor->mbus_format.height; 260 261 /* 262 * Allocate the frame buffer. Use vmalloc to be able to 263 * allocate a large amount of memory 264 */ 265 vsensor->frame = vmalloc(frame_size); 266 if (!vsensor->frame) 267 return -ENOMEM; 268 269 /* configure the test pattern generator */ 270 vimc_sensor_tpg_s_format(vsensor); 271 272 } else { 273 274 vfree(vsensor->frame); 275 vsensor->frame = NULL; 276 } 277 278 return 0; 279} 280 281static const struct v4l2_subdev_core_ops vimc_sensor_core_ops = { 282 .log_status = v4l2_ctrl_subdev_log_status, 283 .subscribe_event = v4l2_ctrl_subdev_subscribe_event, 284 .unsubscribe_event = v4l2_event_subdev_unsubscribe, 285}; 286 287static const struct v4l2_subdev_video_ops vimc_sensor_video_ops = { 288 .s_stream = vimc_sensor_s_stream, 289}; 290 291static const struct v4l2_subdev_ops vimc_sensor_ops = { 292 .core = &vimc_sensor_core_ops, 293 .pad = &vimc_sensor_pad_ops, 294 .video = &vimc_sensor_video_ops, 295}; 296 297static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl) 298{ 299 struct vimc_sensor_device *vsensor = 300 container_of(ctrl->handler, struct vimc_sensor_device, hdl); 301 302 switch (ctrl->id) { 303 case VIMC_CID_TEST_PATTERN: 304 tpg_s_pattern(&vsensor->tpg, ctrl->val); 305 break; 306 case V4L2_CID_HFLIP: 307 tpg_s_hflip(&vsensor->tpg, ctrl->val); 308 break; 309 case V4L2_CID_VFLIP: 310 tpg_s_vflip(&vsensor->tpg, ctrl->val); 311 break; 312 case V4L2_CID_BRIGHTNESS: 313 tpg_s_brightness(&vsensor->tpg, ctrl->val); 314 break; 315 case V4L2_CID_CONTRAST: 316 tpg_s_contrast(&vsensor->tpg, ctrl->val); 317 break; 318 case V4L2_CID_HUE: 319 tpg_s_hue(&vsensor->tpg, ctrl->val); 320 break; 321 case V4L2_CID_SATURATION: 322 tpg_s_saturation(&vsensor->tpg, ctrl->val); 323 break; 324 case VIMC_CID_OSD_TEXT_MODE: 325 vsensor->osd_value = ctrl->val; 326 break; 327 default: 328 return -EINVAL; 329 } 330 return 0; 331} 332 333static const struct v4l2_ctrl_ops vimc_sensor_ctrl_ops = { 334 .s_ctrl = vimc_sensor_s_ctrl, 335}; 336 337static void vimc_sensor_release(struct vimc_ent_device *ved) 338{ 339 struct vimc_sensor_device *vsensor = 340 container_of(ved, struct vimc_sensor_device, ved); 341 342 v4l2_ctrl_handler_free(&vsensor->hdl); 343 tpg_free(&vsensor->tpg); 344 media_entity_cleanup(vsensor->ved.ent); 345 kfree(vsensor); 346} 347 348/* Image Processing Controls */ 349static const struct v4l2_ctrl_config vimc_sensor_ctrl_class = { 350 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY, 351 .id = VIMC_CID_VIMC_CLASS, 352 .name = "VIMC Controls", 353 .type = V4L2_CTRL_TYPE_CTRL_CLASS, 354}; 355 356static const struct v4l2_ctrl_config vimc_sensor_ctrl_test_pattern = { 357 .ops = &vimc_sensor_ctrl_ops, 358 .id = VIMC_CID_TEST_PATTERN, 359 .name = "Test Pattern", 360 .type = V4L2_CTRL_TYPE_MENU, 361 .max = TPG_PAT_NOISE, 362 .qmenu = tpg_pattern_strings, 363}; 364 365static const char * const vimc_ctrl_osd_mode_strings[] = { 366 "All", 367 "Counters Only", 368 "None", 369 NULL, 370}; 371 372static const struct v4l2_ctrl_config vimc_sensor_ctrl_osd_mode = { 373 .ops = &vimc_sensor_ctrl_ops, 374 .id = VIMC_CID_OSD_TEXT_MODE, 375 .name = "Show Information", 376 .type = V4L2_CTRL_TYPE_MENU, 377 .max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2, 378 .qmenu = vimc_ctrl_osd_mode_strings, 379}; 380 381static struct vimc_ent_device *vimc_sensor_add(struct vimc_device *vimc, 382 const char *vcfg_name) 383{ 384 struct v4l2_device *v4l2_dev = &vimc->v4l2_dev; 385 struct vimc_sensor_device *vsensor; 386 int ret; 387 388 /* Allocate the vsensor struct */ 389 vsensor = kzalloc(sizeof(*vsensor), GFP_KERNEL); 390 if (!vsensor) 391 return ERR_PTR(-ENOMEM); 392 393 v4l2_ctrl_handler_init(&vsensor->hdl, 4); 394 395 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_class, NULL); 396 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_test_pattern, NULL); 397 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_osd_mode, NULL); 398 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 399 V4L2_CID_VFLIP, 0, 1, 1, 0); 400 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 401 V4L2_CID_HFLIP, 0, 1, 1, 0); 402 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 403 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 404 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 405 V4L2_CID_CONTRAST, 0, 255, 1, 128); 406 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 407 V4L2_CID_HUE, -128, 127, 1, 0); 408 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 409 V4L2_CID_SATURATION, 0, 255, 1, 128); 410 vsensor->sd.ctrl_handler = &vsensor->hdl; 411 if (vsensor->hdl.error) { 412 ret = vsensor->hdl.error; 413 goto err_free_vsensor; 414 } 415 416 /* Initialize the test pattern generator */ 417 tpg_init(&vsensor->tpg, vsensor->mbus_format.width, 418 vsensor->mbus_format.height); 419 ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH); 420 if (ret) 421 goto err_free_hdl; 422 423 /* Initialize ved and sd */ 424 vsensor->pad.flags = MEDIA_PAD_FL_SOURCE; 425 ret = vimc_ent_sd_register(&vsensor->ved, &vsensor->sd, v4l2_dev, 426 vcfg_name, 427 MEDIA_ENT_F_CAM_SENSOR, 1, &vsensor->pad, 428 &vimc_sensor_ops); 429 if (ret) 430 goto err_free_tpg; 431 432 vsensor->ved.process_frame = vimc_sensor_process_frame; 433 vsensor->ved.dev = vimc->mdev.dev; 434 435 /* Initialize the frame format */ 436 vsensor->mbus_format = fmt_default; 437 438 return &vsensor->ved; 439 440err_free_tpg: 441 tpg_free(&vsensor->tpg); 442err_free_hdl: 443 v4l2_ctrl_handler_free(&vsensor->hdl); 444err_free_vsensor: 445 kfree(vsensor); 446 447 return ERR_PTR(ret); 448} 449 450struct vimc_ent_type vimc_sensor_type = { 451 .add = vimc_sensor_add, 452 .release = vimc_sensor_release 453}; 454