1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT) 2 /* 3 * Rockchip ISP1 Driver - Base driver 4 * 5 * Copyright (C) 2019 Collabora, Ltd. 6 * 7 * Based on Rockchip ISP1 driver by Rockchip Electronics Co., Ltd. 8 * Copyright (C) 2017 Rockchip Electronics Co., Ltd. 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/debugfs.h> 13 #include <linux/interrupt.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_graph.h> 17 #include <linux/of_platform.h> 18 #include <linux/pinctrl/consumer.h> 19 #include <linux/phy/phy.h> 20 #include <linux/phy/phy-mipi-dphy.h> 21 #include <media/v4l2-fwnode.h> 22 23 #include "rkisp1-common.h" 24 25 /* 26 * ISP Details 27 * ----------- 28 * 29 * ISP Comprises with: 30 * MIPI serial camera interface 31 * Image Signal Processing 32 * Many Image Enhancement Blocks 33 * Crop 34 * Resizer 35 * RBG display ready image 36 * Image Rotation 37 * 38 * ISP Block Diagram 39 * ----------------- 40 * rkisp1-resizer.c rkisp1-capture.c 41 * |====================| |=======================| 42 * rkisp1-isp.c Main Picture Path 43 * |==========================| |===============================================| 44 * +-----------+ +--+--+--+--+ +--------+ +--------+ +-----------+ 45 * | | | | | | | | | | | | | 46 * +--------+ |\ | | | | | | | -->| Crop |->| RSZ |------------->| | 47 * | MIPI |--->| \ | | | | | | | | | | | | | | 48 * +--------+ | | | | |IE|IE|IE|IE| | +--------+ +--------+ | Memory | 49 * |MUX|--->| ISP |->|0 |1 |2 |3 |---+ | Interface | 50 * +--------+ | | | | | | | | | | +--------+ +--------+ +--------+ | | 51 * |Parallel|--->| / | | | | | | | | | | | | | | | | 52 * +--------+ |/ | | | | | | | -->| Crop |->| RSZ |->| RGB |->| | 53 * | | | | | | | | | | | | Rotate | | | 54 * +-----------+ +--+--+--+--+ +--------+ +--------+ +--------+ +-----------+ 55 * ^ 56 * +--------+ | |===============================================| 57 * | DMA |------------------------------------+ Self Picture Path 58 * +--------+ 59 * 60 * rkisp1-stats.c rkisp1-params.c 61 * |===============| |===============| 62 * +---------------+ +---------------+ 63 * | | | | 64 * | ISP | | ISP | 65 * | | | | 66 * +---------------+ +---------------+ 67 * 68 * 69 * Media Topology 70 * -------------- 71 * +----------+ +----------+ 72 * | Sensor 2 | | Sensor X | 73 * ------------ ... ------------ 74 * | 0 | | 0 | 75 * +----------+ +----------+ +-----------+ 76 * \ | | params | 77 * \ | | (output) | 78 * +----------+ \ | +-----------+ 79 * | Sensor 1 | v v | 80 * ------------ +------+------+ | 81 * | 0 |----->| 0 | 1 |<---------+ 82 * +----------+ |------+------| 83 * | ISP | 84 * |------+------| 85 * +-------------| 2 | 3 |----------+ 86 * | +------+------+ | 87 * | | | 88 * v v v 89 * +- ---------+ +-----------+ +-----------+ 90 * | 0 | | 0 | | stats | 91 * ------------- ------------- | (capture) | 92 * | Resizer | | Resizer | +-----------+ 93 * ------------| ------------| 94 * | 1 | | 1 | 95 * +-----------+ +-----------+ 96 * | | 97 * v v 98 * +-----------+ +-----------+ 99 * | selfpath | | mainpath | 100 * | (capture) | | (capture) | 101 * +-----------+ +-----------+ 102 */ 103 104 struct rkisp1_match_data { 105 const char * const *clks; 106 unsigned int size; 107 }; 108 109 /* ---------------------------------------------------------------------------- 110 * Sensor DT bindings 111 */ 112 113 static int rkisp1_create_links(struct rkisp1_device *rkisp1) 114 { 115 struct media_entity *source, *sink; 116 unsigned int flags, source_pad; 117 struct v4l2_subdev *sd; 118 unsigned int i; 119 int ret; 120 121 /* sensor links */ 122 flags = MEDIA_LNK_FL_ENABLED; 123 list_for_each_entry(sd, &rkisp1->v4l2_dev.subdevs, list) { 124 if (sd == &rkisp1->isp.sd || 125 sd == &rkisp1->resizer_devs[RKISP1_MAINPATH].sd || 126 sd == &rkisp1->resizer_devs[RKISP1_SELFPATH].sd) 127 continue; 128 129 ret = media_entity_get_fwnode_pad(&sd->entity, sd->fwnode, 130 MEDIA_PAD_FL_SOURCE); 131 if (ret < 0) { 132 dev_err(rkisp1->dev, "failed to find src pad for %s\n", 133 sd->name); 134 return ret; 135 } 136 source_pad = ret; 137 138 ret = media_create_pad_link(&sd->entity, source_pad, 139 &rkisp1->isp.sd.entity, 140 RKISP1_ISP_PAD_SINK_VIDEO, 141 flags); 142 if (ret) 143 return ret; 144 145 flags = 0; 146 } 147 148 flags = MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE; 149 150 /* create ISP->RSZ->CAP links */ 151 for (i = 0; i < 2; i++) { 152 source = &rkisp1->isp.sd.entity; 153 sink = &rkisp1->resizer_devs[i].sd.entity; 154 ret = media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_VIDEO, 155 sink, RKISP1_RSZ_PAD_SINK, 156 MEDIA_LNK_FL_ENABLED); 157 if (ret) 158 return ret; 159 160 source = sink; 161 sink = &rkisp1->capture_devs[i].vnode.vdev.entity; 162 ret = media_create_pad_link(source, RKISP1_RSZ_PAD_SRC, 163 sink, 0, flags); 164 if (ret) 165 return ret; 166 } 167 168 /* params links */ 169 source = &rkisp1->params.vnode.vdev.entity; 170 sink = &rkisp1->isp.sd.entity; 171 ret = media_create_pad_link(source, 0, sink, 172 RKISP1_ISP_PAD_SINK_PARAMS, flags); 173 if (ret) 174 return ret; 175 176 /* 3A stats links */ 177 source = &rkisp1->isp.sd.entity; 178 sink = &rkisp1->stats.vnode.vdev.entity; 179 return media_create_pad_link(source, RKISP1_ISP_PAD_SOURCE_STATS, 180 sink, 0, flags); 181 } 182 183 static int rkisp1_subdev_notifier_bound(struct v4l2_async_notifier *notifier, 184 struct v4l2_subdev *sd, 185 struct v4l2_async_subdev *asd) 186 { 187 struct rkisp1_device *rkisp1 = 188 container_of(notifier, struct rkisp1_device, notifier); 189 struct rkisp1_sensor_async *s_asd = 190 container_of(asd, struct rkisp1_sensor_async, asd); 191 192 s_asd->pixel_rate_ctrl = v4l2_ctrl_find(sd->ctrl_handler, 193 V4L2_CID_PIXEL_RATE); 194 s_asd->sd = sd; 195 s_asd->dphy = devm_phy_get(rkisp1->dev, "dphy"); 196 if (IS_ERR(s_asd->dphy)) { 197 if (PTR_ERR(s_asd->dphy) != -EPROBE_DEFER) 198 dev_err(rkisp1->dev, "Couldn't get the MIPI D-PHY\n"); 199 return PTR_ERR(s_asd->dphy); 200 } 201 202 phy_init(s_asd->dphy); 203 204 return 0; 205 } 206 207 static void rkisp1_subdev_notifier_unbind(struct v4l2_async_notifier *notifier, 208 struct v4l2_subdev *sd, 209 struct v4l2_async_subdev *asd) 210 { 211 struct rkisp1_sensor_async *s_asd = 212 container_of(asd, struct rkisp1_sensor_async, asd); 213 214 phy_exit(s_asd->dphy); 215 } 216 217 static int rkisp1_subdev_notifier_complete(struct v4l2_async_notifier *notifier) 218 { 219 struct rkisp1_device *rkisp1 = 220 container_of(notifier, struct rkisp1_device, notifier); 221 int ret; 222 223 ret = rkisp1_create_links(rkisp1); 224 if (ret) 225 return ret; 226 227 ret = v4l2_device_register_subdev_nodes(&rkisp1->v4l2_dev); 228 if (ret) 229 return ret; 230 231 dev_dbg(rkisp1->dev, "Async subdev notifier completed\n"); 232 233 return 0; 234 } 235 236 static const struct v4l2_async_notifier_operations rkisp1_subdev_notifier_ops = { 237 .bound = rkisp1_subdev_notifier_bound, 238 .unbind = rkisp1_subdev_notifier_unbind, 239 .complete = rkisp1_subdev_notifier_complete, 240 }; 241 242 static int rkisp1_subdev_notifier(struct rkisp1_device *rkisp1) 243 { 244 struct v4l2_async_notifier *ntf = &rkisp1->notifier; 245 unsigned int next_id = 0; 246 int ret; 247 248 v4l2_async_notifier_init(ntf); 249 250 while (1) { 251 struct v4l2_fwnode_endpoint vep = { 252 .bus_type = V4L2_MBUS_CSI2_DPHY 253 }; 254 struct rkisp1_sensor_async *rk_asd = NULL; 255 struct fwnode_handle *ep; 256 257 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(rkisp1->dev), 258 0, next_id, 259 FWNODE_GRAPH_ENDPOINT_NEXT); 260 if (!ep) 261 break; 262 263 ret = v4l2_fwnode_endpoint_parse(ep, &vep); 264 if (ret) 265 goto err_parse; 266 267 rk_asd = kzalloc(sizeof(*rk_asd), GFP_KERNEL); 268 if (!rk_asd) { 269 ret = -ENOMEM; 270 goto err_parse; 271 } 272 273 rk_asd->mbus_type = vep.bus_type; 274 rk_asd->mbus_flags = vep.bus.mipi_csi2.flags; 275 rk_asd->lanes = vep.bus.mipi_csi2.num_data_lanes; 276 277 ret = v4l2_async_notifier_add_fwnode_remote_subdev(ntf, ep, 278 &rk_asd->asd); 279 if (ret) 280 goto err_parse; 281 282 dev_dbg(rkisp1->dev, "registered ep id %d with %d lanes\n", 283 vep.base.id, rk_asd->lanes); 284 285 next_id = vep.base.id + 1; 286 287 fwnode_handle_put(ep); 288 289 continue; 290 err_parse: 291 fwnode_handle_put(ep); 292 kfree(rk_asd); 293 v4l2_async_notifier_cleanup(ntf); 294 return ret; 295 } 296 297 if (next_id == 0) 298 dev_dbg(rkisp1->dev, "no remote subdevice found\n"); 299 ntf->ops = &rkisp1_subdev_notifier_ops; 300 ret = v4l2_async_notifier_register(&rkisp1->v4l2_dev, ntf); 301 if (ret) { 302 v4l2_async_notifier_cleanup(ntf); 303 return ret; 304 } 305 return 0; 306 } 307 308 /* ---------------------------------------------------------------------------- 309 * Power 310 */ 311 312 static int __maybe_unused rkisp1_runtime_suspend(struct device *dev) 313 { 314 struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); 315 316 clk_bulk_disable_unprepare(rkisp1->clk_size, rkisp1->clks); 317 return pinctrl_pm_select_sleep_state(dev); 318 } 319 320 static int __maybe_unused rkisp1_runtime_resume(struct device *dev) 321 { 322 struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); 323 int ret; 324 325 ret = pinctrl_pm_select_default_state(dev); 326 if (ret) 327 return ret; 328 ret = clk_bulk_prepare_enable(rkisp1->clk_size, rkisp1->clks); 329 if (ret) 330 return ret; 331 332 return 0; 333 } 334 335 static const struct dev_pm_ops rkisp1_pm_ops = { 336 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 337 pm_runtime_force_resume) 338 SET_RUNTIME_PM_OPS(rkisp1_runtime_suspend, rkisp1_runtime_resume, NULL) 339 }; 340 341 /* ---------------------------------------------------------------------------- 342 * Core 343 */ 344 345 static int rkisp1_entities_register(struct rkisp1_device *rkisp1) 346 { 347 int ret; 348 349 ret = rkisp1_isp_register(rkisp1); 350 if (ret) 351 return ret; 352 353 ret = rkisp1_resizer_devs_register(rkisp1); 354 if (ret) 355 goto err_unreg_isp_subdev; 356 357 ret = rkisp1_capture_devs_register(rkisp1); 358 if (ret) 359 goto err_unreg_resizer_devs; 360 361 ret = rkisp1_stats_register(rkisp1); 362 if (ret) 363 goto err_unreg_capture_devs; 364 365 ret = rkisp1_params_register(rkisp1); 366 if (ret) 367 goto err_unreg_stats; 368 369 ret = rkisp1_subdev_notifier(rkisp1); 370 if (ret) { 371 dev_err(rkisp1->dev, 372 "Failed to register subdev notifier(%d)\n", ret); 373 goto err_unreg_params; 374 } 375 376 return 0; 377 err_unreg_params: 378 rkisp1_params_unregister(rkisp1); 379 err_unreg_stats: 380 rkisp1_stats_unregister(rkisp1); 381 err_unreg_capture_devs: 382 rkisp1_capture_devs_unregister(rkisp1); 383 err_unreg_resizer_devs: 384 rkisp1_resizer_devs_unregister(rkisp1); 385 err_unreg_isp_subdev: 386 rkisp1_isp_unregister(rkisp1); 387 return ret; 388 } 389 390 static irqreturn_t rkisp1_isr(int irq, void *ctx) 391 { 392 struct device *dev = ctx; 393 struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); 394 395 /* 396 * Call rkisp1_capture_isr() first to handle the frame that 397 * potentially completed using the current frame_sequence number before 398 * it is potentially incremented by rkisp1_isp_isr() in the vertical 399 * sync. 400 */ 401 rkisp1_capture_isr(rkisp1); 402 rkisp1_isp_isr(rkisp1); 403 rkisp1_mipi_isr(rkisp1); 404 405 return IRQ_HANDLED; 406 } 407 408 static const char * const rk3399_isp_clks[] = { 409 "isp", 410 "aclk", 411 "hclk", 412 }; 413 414 static const struct rkisp1_match_data rk3399_isp_clk_data = { 415 .clks = rk3399_isp_clks, 416 .size = ARRAY_SIZE(rk3399_isp_clks), 417 }; 418 419 static const struct of_device_id rkisp1_of_match[] = { 420 { 421 .compatible = "rockchip,rk3399-cif-isp", 422 .data = &rk3399_isp_clk_data, 423 }, 424 {}, 425 }; 426 MODULE_DEVICE_TABLE(of, rkisp1_of_match); 427 428 static void rkisp1_debug_init(struct rkisp1_device *rkisp1) 429 { 430 struct rkisp1_debug *debug = &rkisp1->debug; 431 432 debug->debugfs_dir = debugfs_create_dir(RKISP1_DRIVER_NAME, NULL); 433 debugfs_create_ulong("data_loss", 0444, debug->debugfs_dir, 434 &debug->data_loss); 435 debugfs_create_ulong("outform_size_err", 0444, debug->debugfs_dir, 436 &debug->outform_size_error); 437 debugfs_create_ulong("img_stabilization_size_error", 0444, 438 debug->debugfs_dir, 439 &debug->img_stabilization_size_error); 440 debugfs_create_ulong("inform_size_error", 0444, debug->debugfs_dir, 441 &debug->inform_size_error); 442 debugfs_create_ulong("irq_delay", 0444, debug->debugfs_dir, 443 &debug->irq_delay); 444 debugfs_create_ulong("mipi_error", 0444, debug->debugfs_dir, 445 &debug->mipi_error); 446 debugfs_create_ulong("stats_error", 0444, debug->debugfs_dir, 447 &debug->stats_error); 448 debugfs_create_ulong("mp_stop_timeout", 0444, debug->debugfs_dir, 449 &debug->stop_timeout[RKISP1_MAINPATH]); 450 debugfs_create_ulong("sp_stop_timeout", 0444, debug->debugfs_dir, 451 &debug->stop_timeout[RKISP1_SELFPATH]); 452 debugfs_create_ulong("mp_frame_drop", 0444, debug->debugfs_dir, 453 &debug->frame_drop[RKISP1_MAINPATH]); 454 debugfs_create_ulong("sp_frame_drop", 0444, debug->debugfs_dir, 455 &debug->frame_drop[RKISP1_SELFPATH]); 456 } 457 458 static int rkisp1_probe(struct platform_device *pdev) 459 { 460 const struct rkisp1_match_data *clk_data; 461 struct device *dev = &pdev->dev; 462 struct rkisp1_device *rkisp1; 463 struct v4l2_device *v4l2_dev; 464 unsigned int i; 465 int ret, irq; 466 467 clk_data = of_device_get_match_data(&pdev->dev); 468 if (!clk_data) 469 return -ENODEV; 470 471 rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL); 472 if (!rkisp1) 473 return -ENOMEM; 474 475 dev_set_drvdata(dev, rkisp1); 476 rkisp1->dev = dev; 477 478 mutex_init(&rkisp1->stream_lock); 479 480 rkisp1->base_addr = devm_platform_ioremap_resource(pdev, 0); 481 if (IS_ERR(rkisp1->base_addr)) 482 return PTR_ERR(rkisp1->base_addr); 483 484 irq = platform_get_irq(pdev, 0); 485 if (irq < 0) 486 return irq; 487 488 ret = devm_request_irq(dev, irq, rkisp1_isr, IRQF_SHARED, 489 dev_driver_string(dev), dev); 490 if (ret) { 491 dev_err(dev, "request irq failed: %d\n", ret); 492 return ret; 493 } 494 495 rkisp1->irq = irq; 496 497 for (i = 0; i < clk_data->size; i++) 498 rkisp1->clks[i].id = clk_data->clks[i]; 499 ret = devm_clk_bulk_get(dev, clk_data->size, rkisp1->clks); 500 if (ret) 501 return ret; 502 rkisp1->clk_size = clk_data->size; 503 504 pm_runtime_enable(&pdev->dev); 505 506 strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME, 507 sizeof(rkisp1->media_dev.model)); 508 rkisp1->media_dev.dev = &pdev->dev; 509 strscpy(rkisp1->media_dev.bus_info, RKISP1_BUS_INFO, 510 sizeof(rkisp1->media_dev.bus_info)); 511 media_device_init(&rkisp1->media_dev); 512 513 v4l2_dev = &rkisp1->v4l2_dev; 514 v4l2_dev->mdev = &rkisp1->media_dev; 515 strscpy(v4l2_dev->name, RKISP1_DRIVER_NAME, sizeof(v4l2_dev->name)); 516 517 ret = v4l2_device_register(rkisp1->dev, &rkisp1->v4l2_dev); 518 if (ret) 519 return ret; 520 521 ret = media_device_register(&rkisp1->media_dev); 522 if (ret) { 523 dev_err(dev, "Failed to register media device: %d\n", ret); 524 goto err_unreg_v4l2_dev; 525 } 526 527 ret = rkisp1_entities_register(rkisp1); 528 if (ret) 529 goto err_unreg_media_dev; 530 531 rkisp1_debug_init(rkisp1); 532 533 return 0; 534 535 err_unreg_media_dev: 536 media_device_unregister(&rkisp1->media_dev); 537 err_unreg_v4l2_dev: 538 v4l2_device_unregister(&rkisp1->v4l2_dev); 539 pm_runtime_disable(&pdev->dev); 540 return ret; 541 } 542 543 static int rkisp1_remove(struct platform_device *pdev) 544 { 545 struct rkisp1_device *rkisp1 = platform_get_drvdata(pdev); 546 547 v4l2_async_notifier_unregister(&rkisp1->notifier); 548 v4l2_async_notifier_cleanup(&rkisp1->notifier); 549 550 rkisp1_params_unregister(rkisp1); 551 rkisp1_stats_unregister(rkisp1); 552 rkisp1_capture_devs_unregister(rkisp1); 553 rkisp1_resizer_devs_unregister(rkisp1); 554 rkisp1_isp_unregister(rkisp1); 555 556 media_device_unregister(&rkisp1->media_dev); 557 v4l2_device_unregister(&rkisp1->v4l2_dev); 558 559 pm_runtime_disable(&pdev->dev); 560 561 debugfs_remove_recursive(rkisp1->debug.debugfs_dir); 562 return 0; 563 } 564 565 static struct platform_driver rkisp1_drv = { 566 .driver = { 567 .name = RKISP1_DRIVER_NAME, 568 .of_match_table = of_match_ptr(rkisp1_of_match), 569 .pm = &rkisp1_pm_ops, 570 }, 571 .probe = rkisp1_probe, 572 .remove = rkisp1_remove, 573 }; 574 575 module_platform_driver(rkisp1_drv); 576 MODULE_DESCRIPTION("Rockchip ISP1 platform driver"); 577 MODULE_LICENSE("Dual MIT/GPL"); 578