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 static const struct v4l2_mbus_framefmt fmt_default = { 18 .width = 640, 19 .height = 480, 20 .code = MEDIA_BUS_FMT_RGB888_1X24, 21 .field = V4L2_FIELD_NONE, 22 .colorspace = V4L2_COLORSPACE_SRGB, 23 }; 24 25 static int vimc_sensor_init_state(struct v4l2_subdev *sd, 26 struct v4l2_subdev_state *sd_state) 27 { 28 struct v4l2_mbus_framefmt *mf; 29 30 mf = v4l2_subdev_state_get_format(sd_state, 0); 31 *mf = fmt_default; 32 33 return 0; 34 } 35 36 static int vimc_sensor_enum_mbus_code(struct v4l2_subdev *sd, 37 struct v4l2_subdev_state *sd_state, 38 struct v4l2_subdev_mbus_code_enum *code) 39 { 40 u32 mbus_code = vimc_mbus_code_by_index(code->index); 41 42 if (!mbus_code) 43 return -EINVAL; 44 45 code->code = mbus_code; 46 47 return 0; 48 } 49 50 static int vimc_sensor_enum_frame_size(struct v4l2_subdev *sd, 51 struct v4l2_subdev_state *sd_state, 52 struct v4l2_subdev_frame_size_enum *fse) 53 { 54 const struct vimc_pix_map *vpix; 55 56 if (fse->index) 57 return -EINVAL; 58 59 /* Only accept code in the pix map table */ 60 vpix = vimc_pix_map_by_code(fse->code); 61 if (!vpix) 62 return -EINVAL; 63 64 fse->min_width = VIMC_FRAME_MIN_WIDTH; 65 fse->max_width = VIMC_FRAME_MAX_WIDTH; 66 fse->min_height = VIMC_FRAME_MIN_HEIGHT; 67 fse->max_height = VIMC_FRAME_MAX_HEIGHT; 68 69 return 0; 70 } 71 72 static void vimc_sensor_tpg_s_format(struct vimc_sensor_device *vsensor, 73 const struct v4l2_mbus_framefmt *format) 74 { 75 const struct vimc_pix_map *vpix = vimc_pix_map_by_code(format->code); 76 77 tpg_reset_source(&vsensor->tpg, format->width, format->height, 78 format->field); 79 tpg_s_bytesperline(&vsensor->tpg, 0, format->width * vpix->bpp); 80 tpg_s_buf_height(&vsensor->tpg, format->height); 81 tpg_s_fourcc(&vsensor->tpg, vpix->pixelformat); 82 /* TODO: add support for V4L2_FIELD_ALTERNATE */ 83 tpg_s_field(&vsensor->tpg, format->field, false); 84 tpg_s_colorspace(&vsensor->tpg, format->colorspace); 85 tpg_s_ycbcr_enc(&vsensor->tpg, format->ycbcr_enc); 86 tpg_s_quantization(&vsensor->tpg, format->quantization); 87 tpg_s_xfer_func(&vsensor->tpg, format->xfer_func); 88 } 89 90 static void vimc_sensor_adjust_fmt(struct v4l2_mbus_framefmt *fmt) 91 { 92 const struct vimc_pix_map *vpix; 93 94 /* Only accept code in the pix map table */ 95 vpix = vimc_pix_map_by_code(fmt->code); 96 if (!vpix) 97 fmt->code = fmt_default.code; 98 99 fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH, 100 VIMC_FRAME_MAX_WIDTH) & ~1; 101 fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT, 102 VIMC_FRAME_MAX_HEIGHT) & ~1; 103 104 /* TODO: add support for V4L2_FIELD_ALTERNATE */ 105 if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE) 106 fmt->field = fmt_default.field; 107 108 vimc_colorimetry_clamp(fmt); 109 } 110 111 static int vimc_sensor_set_fmt(struct v4l2_subdev *sd, 112 struct v4l2_subdev_state *sd_state, 113 struct v4l2_subdev_format *fmt) 114 { 115 struct vimc_sensor_device *vsensor = v4l2_get_subdevdata(sd); 116 struct v4l2_mbus_framefmt *mf; 117 118 /* Do not change the format while stream is on */ 119 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE && vsensor->frame) 120 return -EBUSY; 121 122 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 123 124 /* Set the new format */ 125 vimc_sensor_adjust_fmt(&fmt->format); 126 127 dev_dbg(vsensor->ved.dev, "%s: format update: " 128 "old:%dx%d (0x%x, %d, %d, %d, %d) " 129 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsensor->sd.name, 130 /* old */ 131 mf->width, mf->height, mf->code, 132 mf->colorspace, mf->quantization, 133 mf->xfer_func, mf->ycbcr_enc, 134 /* new */ 135 fmt->format.width, fmt->format.height, fmt->format.code, 136 fmt->format.colorspace, fmt->format.quantization, 137 fmt->format.xfer_func, fmt->format.ycbcr_enc); 138 139 *mf = fmt->format; 140 141 return 0; 142 } 143 144 static const struct v4l2_subdev_pad_ops vimc_sensor_pad_ops = { 145 .enum_mbus_code = vimc_sensor_enum_mbus_code, 146 .enum_frame_size = vimc_sensor_enum_frame_size, 147 .get_fmt = v4l2_subdev_get_fmt, 148 .set_fmt = vimc_sensor_set_fmt, 149 }; 150 151 static void *vimc_sensor_process_frame(struct vimc_ent_device *ved, 152 const void *sink_frame) 153 { 154 struct vimc_sensor_device *vsensor = 155 container_of(ved, struct vimc_sensor_device, ved); 156 157 const unsigned int line_height = 16; 158 u8 *basep[TPG_MAX_PLANES][2]; 159 unsigned int line = 1; 160 char str[100]; 161 162 tpg_fill_plane_buffer(&vsensor->tpg, 0, 0, vsensor->frame); 163 tpg_calc_text_basep(&vsensor->tpg, basep, 0, vsensor->frame); 164 switch (vsensor->hw.osd_value) { 165 case VIMC_SENSOR_OSD_SHOW_ALL: { 166 const char *order = tpg_g_color_order(&vsensor->tpg); 167 168 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 169 16, order); 170 snprintf(str, sizeof(str), 171 "brightness %3d, contrast %3d, saturation %3d, hue %d ", 172 vsensor->tpg.brightness, 173 vsensor->tpg.contrast, 174 vsensor->tpg.saturation, 175 vsensor->tpg.hue); 176 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 177 snprintf(str, sizeof(str), "sensor size: %dx%d", 178 vsensor->hw.size.width, vsensor->hw.size.height); 179 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 180 fallthrough; 181 } 182 case VIMC_SENSOR_OSD_SHOW_COUNTERS: { 183 unsigned int ms; 184 185 ms = div_u64(ktime_get_ns() - vsensor->hw.start_stream_ts, 1000000); 186 snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d", 187 (ms / (60 * 60 * 1000)) % 24, 188 (ms / (60 * 1000)) % 60, 189 (ms / 1000) % 60, 190 ms % 1000); 191 tpg_gen_text(&vsensor->tpg, basep, line++ * line_height, 16, str); 192 break; 193 } 194 case VIMC_SENSOR_OSD_SHOW_NONE: 195 default: 196 break; 197 } 198 199 return vsensor->frame; 200 } 201 202 static int vimc_sensor_s_stream(struct v4l2_subdev *sd, int enable) 203 { 204 struct vimc_sensor_device *vsensor = 205 container_of(sd, struct vimc_sensor_device, sd); 206 207 if (enable) { 208 const struct v4l2_mbus_framefmt *format; 209 struct v4l2_subdev_state *state; 210 const struct vimc_pix_map *vpix; 211 unsigned int frame_size; 212 213 state = v4l2_subdev_lock_and_get_active_state(sd); 214 format = v4l2_subdev_state_get_format(state, 0); 215 216 /* Configure the test pattern generator. */ 217 vimc_sensor_tpg_s_format(vsensor, format); 218 219 /* Calculate the frame size. */ 220 vpix = vimc_pix_map_by_code(format->code); 221 frame_size = format->width * vpix->bpp * format->height; 222 223 vsensor->hw.size.width = format->width; 224 vsensor->hw.size.height = format->height; 225 226 v4l2_subdev_unlock_state(state); 227 228 /* 229 * Allocate the frame buffer. Use vmalloc to be able to 230 * allocate a large amount of memory 231 */ 232 vsensor->frame = vmalloc(frame_size); 233 if (!vsensor->frame) 234 return -ENOMEM; 235 236 vsensor->hw.start_stream_ts = ktime_get_ns(); 237 } else { 238 239 vfree(vsensor->frame); 240 vsensor->frame = NULL; 241 } 242 243 return 0; 244 } 245 246 static const struct v4l2_subdev_core_ops vimc_sensor_core_ops = { 247 .log_status = v4l2_ctrl_subdev_log_status, 248 .subscribe_event = v4l2_ctrl_subdev_subscribe_event, 249 .unsubscribe_event = v4l2_event_subdev_unsubscribe, 250 }; 251 252 static const struct v4l2_subdev_video_ops vimc_sensor_video_ops = { 253 .s_stream = vimc_sensor_s_stream, 254 }; 255 256 static const struct v4l2_subdev_ops vimc_sensor_ops = { 257 .core = &vimc_sensor_core_ops, 258 .pad = &vimc_sensor_pad_ops, 259 .video = &vimc_sensor_video_ops, 260 }; 261 262 static const struct v4l2_subdev_internal_ops vimc_sensor_internal_ops = { 263 .init_state = vimc_sensor_init_state, 264 }; 265 266 static int vimc_sensor_s_ctrl(struct v4l2_ctrl *ctrl) 267 { 268 struct vimc_sensor_device *vsensor = 269 container_of(ctrl->handler, struct vimc_sensor_device, hdl); 270 271 switch (ctrl->id) { 272 case VIMC_CID_TEST_PATTERN: 273 tpg_s_pattern(&vsensor->tpg, ctrl->val); 274 break; 275 case V4L2_CID_HFLIP: 276 tpg_s_hflip(&vsensor->tpg, ctrl->val); 277 break; 278 case V4L2_CID_VFLIP: 279 tpg_s_vflip(&vsensor->tpg, ctrl->val); 280 break; 281 case V4L2_CID_BRIGHTNESS: 282 tpg_s_brightness(&vsensor->tpg, ctrl->val); 283 break; 284 case V4L2_CID_CONTRAST: 285 tpg_s_contrast(&vsensor->tpg, ctrl->val); 286 break; 287 case V4L2_CID_HUE: 288 tpg_s_hue(&vsensor->tpg, ctrl->val); 289 break; 290 case V4L2_CID_SATURATION: 291 tpg_s_saturation(&vsensor->tpg, ctrl->val); 292 break; 293 case VIMC_CID_OSD_TEXT_MODE: 294 vsensor->hw.osd_value = ctrl->val; 295 break; 296 default: 297 return -EINVAL; 298 } 299 return 0; 300 } 301 302 static const struct v4l2_ctrl_ops vimc_sensor_ctrl_ops = { 303 .s_ctrl = vimc_sensor_s_ctrl, 304 }; 305 306 static void vimc_sensor_release(struct vimc_ent_device *ved) 307 { 308 struct vimc_sensor_device *vsensor = 309 container_of(ved, struct vimc_sensor_device, ved); 310 311 v4l2_ctrl_handler_free(&vsensor->hdl); 312 tpg_free(&vsensor->tpg); 313 v4l2_subdev_cleanup(&vsensor->sd); 314 media_entity_cleanup(vsensor->ved.ent); 315 kfree(vsensor); 316 } 317 318 /* Image Processing Controls */ 319 static const struct v4l2_ctrl_config vimc_sensor_ctrl_class = { 320 .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY, 321 .id = VIMC_CID_VIMC_CLASS, 322 .name = "VIMC Controls", 323 .type = V4L2_CTRL_TYPE_CTRL_CLASS, 324 }; 325 326 static const struct v4l2_ctrl_config vimc_sensor_ctrl_test_pattern = { 327 .ops = &vimc_sensor_ctrl_ops, 328 .id = VIMC_CID_TEST_PATTERN, 329 .name = "Test Pattern", 330 .type = V4L2_CTRL_TYPE_MENU, 331 .max = TPG_PAT_NOISE, 332 .qmenu = tpg_pattern_strings, 333 }; 334 335 static const char * const vimc_ctrl_osd_mode_strings[] = { 336 "All", 337 "Counters Only", 338 "None", 339 NULL, 340 }; 341 342 static const struct v4l2_ctrl_config vimc_sensor_ctrl_osd_mode = { 343 .ops = &vimc_sensor_ctrl_ops, 344 .id = VIMC_CID_OSD_TEXT_MODE, 345 .name = "Show Information", 346 .type = V4L2_CTRL_TYPE_MENU, 347 .max = ARRAY_SIZE(vimc_ctrl_osd_mode_strings) - 2, 348 .qmenu = vimc_ctrl_osd_mode_strings, 349 }; 350 351 static struct vimc_ent_device *vimc_sensor_add(struct vimc_device *vimc, 352 const char *vcfg_name) 353 { 354 struct v4l2_device *v4l2_dev = &vimc->v4l2_dev; 355 struct vimc_sensor_device *vsensor; 356 int ret; 357 358 /* Allocate the vsensor struct */ 359 vsensor = kzalloc_obj(*vsensor); 360 if (!vsensor) 361 return ERR_PTR(-ENOMEM); 362 363 v4l2_ctrl_handler_init(&vsensor->hdl, 4); 364 365 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_class, NULL); 366 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_test_pattern, NULL); 367 v4l2_ctrl_new_custom(&vsensor->hdl, &vimc_sensor_ctrl_osd_mode, NULL); 368 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 369 V4L2_CID_VFLIP, 0, 1, 1, 0); 370 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 371 V4L2_CID_HFLIP, 0, 1, 1, 0); 372 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 373 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 374 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 375 V4L2_CID_CONTRAST, 0, 255, 1, 128); 376 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 377 V4L2_CID_HUE, -128, 127, 1, 0); 378 v4l2_ctrl_new_std(&vsensor->hdl, &vimc_sensor_ctrl_ops, 379 V4L2_CID_SATURATION, 0, 255, 1, 128); 380 vsensor->sd.ctrl_handler = &vsensor->hdl; 381 if (vsensor->hdl.error) { 382 ret = vsensor->hdl.error; 383 goto err_free_vsensor; 384 } 385 386 /* Initialize the test pattern generator */ 387 tpg_init(&vsensor->tpg, fmt_default.width, fmt_default.height); 388 ret = tpg_alloc(&vsensor->tpg, VIMC_FRAME_MAX_WIDTH); 389 if (ret) 390 goto err_free_hdl; 391 392 /* Initialize ved and sd */ 393 vsensor->pad.flags = MEDIA_PAD_FL_SOURCE; 394 ret = vimc_ent_sd_register(&vsensor->ved, &vsensor->sd, v4l2_dev, 395 vcfg_name, 396 MEDIA_ENT_F_CAM_SENSOR, 1, &vsensor->pad, 397 &vimc_sensor_internal_ops, &vimc_sensor_ops); 398 if (ret) 399 goto err_free_tpg; 400 401 vsensor->ved.process_frame = vimc_sensor_process_frame; 402 vsensor->ved.dev = vimc->mdev.dev; 403 404 return &vsensor->ved; 405 406 err_free_tpg: 407 tpg_free(&vsensor->tpg); 408 err_free_hdl: 409 v4l2_ctrl_handler_free(&vsensor->hdl); 410 err_free_vsensor: 411 kfree(vsensor); 412 413 return ERR_PTR(ret); 414 } 415 416 const struct vimc_ent_type vimc_sensor_type = { 417 .add = vimc_sensor_add, 418 .release = vimc_sensor_release 419 }; 420