1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver 4 * 5 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com> 6 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com> 7 * 8 * Based on drivers/media/platform/s5p-fimc, 9 * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd. 10 */ 11 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__ 12 13 #include <linux/bug.h> 14 #include <linux/clk.h> 15 #include <linux/device.h> 16 #include <linux/errno.h> 17 #include <linux/i2c.h> 18 #include <linux/interrupt.h> 19 #include <linux/io.h> 20 #include <linux/kernel.h> 21 #include <linux/list.h> 22 #include <linux/module.h> 23 #include <linux/platform_device.h> 24 #include <linux/pm_runtime.h> 25 #include <linux/ratelimit.h> 26 #include <linux/slab.h> 27 #include <linux/types.h> 28 #include <linux/videodev2.h> 29 30 #include <media/media-device.h> 31 #include <media/v4l2-ctrls.h> 32 #include <media/v4l2-event.h> 33 #include <media/v4l2-ioctl.h> 34 #include <media/videobuf2-v4l2.h> 35 #include <media/videobuf2-dma-contig.h> 36 37 #include "camif-core.h" 38 #include "camif-regs.h" 39 40 static int debug; 41 module_param(debug, int, 0644); 42 43 /* Locking: called with vp->camif->slock spinlock held */ 44 static void camif_cfg_video_path(struct camif_vp *vp) 45 { 46 WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler)); 47 camif_hw_set_scaler(vp); 48 camif_hw_set_flip(vp); 49 camif_hw_set_target_format(vp); 50 camif_hw_set_output_dma(vp); 51 } 52 53 static void camif_prepare_dma_offset(struct camif_vp *vp) 54 { 55 struct camif_frame *f = &vp->out_frame; 56 57 f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left; 58 f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width); 59 60 pr_debug("dma_offset: initial: %d, line: %d\n", 61 f->dma_offset.initial, f->dma_offset.line); 62 } 63 64 /* Locking: called with camif->slock spinlock held */ 65 static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp) 66 { 67 const struct s3c_camif_variant *variant = camif->variant; 68 69 if (camif->sensor.sd == NULL || vp->out_fmt == NULL) 70 return -EINVAL; 71 72 if (variant->ip_revision == S3C244X_CAMIF_IP_REV) 73 camif_hw_clear_fifo_overflow(vp); 74 camif_hw_set_camera_bus(camif); 75 camif_hw_set_source_format(camif); 76 camif_hw_set_camera_crop(camif); 77 camif_hw_set_test_pattern(camif, camif->test_pattern); 78 if (variant->has_img_effect) 79 camif_hw_set_effect(camif, camif->colorfx, 80 camif->colorfx_cr, camif->colorfx_cb); 81 if (variant->ip_revision == S3C6410_CAMIF_IP_REV) 82 camif_hw_set_input_path(vp); 83 camif_cfg_video_path(vp); 84 vp->state &= ~ST_VP_CONFIG; 85 86 return 0; 87 } 88 89 /* 90 * Initialize the video path, only up from the scaler stage. The camera 91 * input interface set up is skipped. This is useful to enable one of the 92 * video paths when the other is already running. 93 * Locking: called with camif->slock spinlock held. 94 */ 95 static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp) 96 { 97 unsigned int ip_rev = camif->variant->ip_revision; 98 99 if (vp->out_fmt == NULL) 100 return -EINVAL; 101 102 camif_prepare_dma_offset(vp); 103 if (ip_rev == S3C244X_CAMIF_IP_REV) 104 camif_hw_clear_fifo_overflow(vp); 105 camif_cfg_video_path(vp); 106 vp->state &= ~ST_VP_CONFIG; 107 return 0; 108 } 109 110 static int sensor_set_power(struct camif_dev *camif, int on) 111 { 112 struct cam_sensor *sensor = &camif->sensor; 113 int err = 0; 114 115 if (camif->sensor.power_count == !on) 116 err = v4l2_subdev_call(sensor->sd, core, s_power, on); 117 if (err == -ENOIOCTLCMD) 118 err = 0; 119 if (!err) 120 sensor->power_count += on ? 1 : -1; 121 122 pr_debug("on: %d, power_count: %d, err: %d\n", 123 on, sensor->power_count, err); 124 125 return err; 126 } 127 128 static int sensor_set_streaming(struct camif_dev *camif, int on) 129 { 130 struct cam_sensor *sensor = &camif->sensor; 131 int err = 0; 132 133 if (camif->sensor.stream_count == !on) 134 err = v4l2_subdev_call(sensor->sd, video, s_stream, on); 135 if (!err) 136 sensor->stream_count += on ? 1 : -1; 137 138 pr_debug("on: %d, stream_count: %d, err: %d\n", 139 on, sensor->stream_count, err); 140 141 return err; 142 } 143 144 /* 145 * Reinitialize the driver so it is ready to start streaming again. 146 * Return any buffers to vb2, perform CAMIF software reset and 147 * turn off streaming at the data pipeline (sensor) if required. 148 */ 149 static int camif_reinitialize(struct camif_vp *vp) 150 { 151 struct camif_dev *camif = vp->camif; 152 struct camif_buffer *buf; 153 unsigned long flags; 154 bool streaming; 155 156 spin_lock_irqsave(&camif->slock, flags); 157 streaming = vp->state & ST_VP_SENSOR_STREAMING; 158 159 vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF | 160 ST_VP_ABORTING | ST_VP_STREAMING | 161 ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ); 162 163 /* Release unused buffers */ 164 while (!list_empty(&vp->pending_buf_q)) { 165 buf = camif_pending_queue_pop(vp); 166 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 167 } 168 169 while (!list_empty(&vp->active_buf_q)) { 170 buf = camif_active_queue_pop(vp); 171 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 172 } 173 174 spin_unlock_irqrestore(&camif->slock, flags); 175 176 if (!streaming) 177 return 0; 178 179 return sensor_set_streaming(camif, 0); 180 } 181 182 static bool s3c_vp_active(struct camif_vp *vp) 183 { 184 struct camif_dev *camif = vp->camif; 185 unsigned long flags; 186 bool ret; 187 188 spin_lock_irqsave(&camif->slock, flags); 189 ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING); 190 spin_unlock_irqrestore(&camif->slock, flags); 191 192 return ret; 193 } 194 195 static bool camif_is_streaming(struct camif_dev *camif) 196 { 197 unsigned long flags; 198 bool status; 199 200 spin_lock_irqsave(&camif->slock, flags); 201 status = camif->stream_count > 0; 202 spin_unlock_irqrestore(&camif->slock, flags); 203 204 return status; 205 } 206 207 static int camif_stop_capture(struct camif_vp *vp) 208 { 209 struct camif_dev *camif = vp->camif; 210 unsigned long flags; 211 int ret; 212 213 if (!s3c_vp_active(vp)) 214 return 0; 215 216 spin_lock_irqsave(&camif->slock, flags); 217 vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ); 218 vp->state |= ST_VP_ABORTING; 219 spin_unlock_irqrestore(&camif->slock, flags); 220 221 ret = wait_event_timeout(vp->irq_queue, 222 !(vp->state & ST_VP_ABORTING), 223 msecs_to_jiffies(CAMIF_STOP_TIMEOUT)); 224 225 spin_lock_irqsave(&camif->slock, flags); 226 227 if (ret == 0 && !(vp->state & ST_VP_OFF)) { 228 /* Timed out, forcibly stop capture */ 229 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING | 230 ST_VP_LASTIRQ); 231 232 camif_hw_disable_capture(vp); 233 camif_hw_enable_scaler(vp, false); 234 } 235 236 spin_unlock_irqrestore(&camif->slock, flags); 237 238 return camif_reinitialize(vp); 239 } 240 241 static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb, 242 struct camif_addr *paddr) 243 { 244 struct camif_frame *frame = &vp->out_frame; 245 u32 pix_size; 246 247 if (vb == NULL || frame == NULL) 248 return -EINVAL; 249 250 pix_size = frame->rect.width * frame->rect.height; 251 252 pr_debug("colplanes: %d, pix_size: %u\n", 253 vp->out_fmt->colplanes, pix_size); 254 255 paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0); 256 257 switch (vp->out_fmt->colplanes) { 258 case 1: 259 paddr->cb = 0; 260 paddr->cr = 0; 261 break; 262 case 2: 263 /* decompose Y into Y/Cb */ 264 paddr->cb = (u32)(paddr->y + pix_size); 265 paddr->cr = 0; 266 break; 267 case 3: 268 paddr->cb = (u32)(paddr->y + pix_size); 269 /* decompose Y into Y/Cb/Cr */ 270 if (vp->out_fmt->color == IMG_FMT_YCBCR422P) 271 paddr->cr = (u32)(paddr->cb + (pix_size >> 1)); 272 else /* 420 */ 273 paddr->cr = (u32)(paddr->cb + (pix_size >> 2)); 274 275 if (vp->out_fmt->color == IMG_FMT_YCRCB420) 276 swap(paddr->cb, paddr->cr); 277 break; 278 default: 279 return -EINVAL; 280 } 281 282 pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n", 283 &paddr->y, &paddr->cb, &paddr->cr); 284 285 return 0; 286 } 287 288 irqreturn_t s3c_camif_irq_handler(int irq, void *priv) 289 { 290 struct camif_vp *vp = priv; 291 struct camif_dev *camif = vp->camif; 292 unsigned int ip_rev = camif->variant->ip_revision; 293 unsigned int status; 294 295 spin_lock(&camif->slock); 296 297 if (ip_rev == S3C6410_CAMIF_IP_REV) 298 camif_hw_clear_pending_irq(vp); 299 300 status = camif_hw_get_status(vp); 301 302 if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) { 303 camif_hw_clear_fifo_overflow(vp); 304 goto unlock; 305 } 306 307 if (vp->state & ST_VP_ABORTING) { 308 if (vp->state & ST_VP_OFF) { 309 /* Last IRQ */ 310 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING | 311 ST_VP_LASTIRQ); 312 wake_up(&vp->irq_queue); 313 goto unlock; 314 } else if (vp->state & ST_VP_LASTIRQ) { 315 camif_hw_disable_capture(vp); 316 camif_hw_enable_scaler(vp, false); 317 camif_hw_set_lastirq(vp, false); 318 vp->state |= ST_VP_OFF; 319 } else { 320 /* Disable capture, enable last IRQ */ 321 camif_hw_set_lastirq(vp, true); 322 vp->state |= ST_VP_LASTIRQ; 323 } 324 } 325 326 if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) && 327 !list_empty(&vp->active_buf_q)) { 328 unsigned int index; 329 struct camif_buffer *vbuf; 330 /* 331 * Get previous DMA write buffer index: 332 * 0 => DMA buffer 0, 2; 333 * 1 => DMA buffer 1, 3. 334 */ 335 index = (CISTATUS_FRAMECNT(status) + 2) & 1; 336 vbuf = camif_active_queue_peek(vp, index); 337 338 if (!WARN_ON(vbuf == NULL)) { 339 /* Dequeue a filled buffer */ 340 vbuf->vb.vb2_buf.timestamp = ktime_get_ns(); 341 vbuf->vb.sequence = vp->frame_sequence++; 342 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE); 343 344 /* Set up an empty buffer at the DMA engine */ 345 vbuf = camif_pending_queue_pop(vp); 346 vbuf->index = index; 347 camif_hw_set_output_addr(vp, &vbuf->paddr, index); 348 camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2); 349 350 /* Scheduled in H/W, add to the queue */ 351 camif_active_queue_add(vp, vbuf); 352 } 353 } else if (!(vp->state & ST_VP_ABORTING) && 354 (vp->state & ST_VP_PENDING)) { 355 vp->state |= ST_VP_RUNNING; 356 } 357 358 if (vp->state & ST_VP_CONFIG) { 359 camif_prepare_dma_offset(vp); 360 camif_hw_set_camera_crop(camif); 361 camif_hw_set_scaler(vp); 362 camif_hw_set_flip(vp); 363 camif_hw_set_test_pattern(camif, camif->test_pattern); 364 if (camif->variant->has_img_effect) 365 camif_hw_set_effect(camif, camif->colorfx, 366 camif->colorfx_cr, camif->colorfx_cb); 367 vp->state &= ~ST_VP_CONFIG; 368 } 369 unlock: 370 spin_unlock(&camif->slock); 371 return IRQ_HANDLED; 372 } 373 374 static int start_streaming(struct vb2_queue *vq, unsigned int count) 375 { 376 struct camif_vp *vp = vb2_get_drv_priv(vq); 377 struct camif_dev *camif = vp->camif; 378 unsigned long flags; 379 int ret; 380 381 /* 382 * We assume the codec capture path is always activated 383 * first, before the preview path starts streaming. 384 * This is required to avoid internal FIFO overflow and 385 * a need for CAMIF software reset. 386 */ 387 spin_lock_irqsave(&camif->slock, flags); 388 389 if (camif->stream_count == 0) { 390 camif_hw_reset(camif); 391 ret = s3c_camif_hw_init(camif, vp); 392 } else { 393 ret = s3c_camif_hw_vp_init(camif, vp); 394 } 395 spin_unlock_irqrestore(&camif->slock, flags); 396 397 if (ret < 0) { 398 camif_reinitialize(vp); 399 return ret; 400 } 401 402 spin_lock_irqsave(&camif->slock, flags); 403 vp->frame_sequence = 0; 404 vp->state |= ST_VP_PENDING; 405 406 if (!list_empty(&vp->pending_buf_q) && 407 (!(vp->state & ST_VP_STREAMING) || 408 !(vp->state & ST_VP_SENSOR_STREAMING))) { 409 410 camif_hw_enable_scaler(vp, vp->scaler.enable); 411 camif_hw_enable_capture(vp); 412 vp->state |= ST_VP_STREAMING; 413 414 if (!(vp->state & ST_VP_SENSOR_STREAMING)) { 415 vp->state |= ST_VP_SENSOR_STREAMING; 416 spin_unlock_irqrestore(&camif->slock, flags); 417 ret = sensor_set_streaming(camif, 1); 418 if (ret) 419 v4l2_err(&vp->vdev, "Sensor s_stream failed\n"); 420 if (debug) 421 camif_hw_dump_regs(camif, __func__); 422 423 return ret; 424 } 425 } 426 427 spin_unlock_irqrestore(&camif->slock, flags); 428 return 0; 429 } 430 431 static void stop_streaming(struct vb2_queue *vq) 432 { 433 struct camif_vp *vp = vb2_get_drv_priv(vq); 434 camif_stop_capture(vp); 435 } 436 437 static int queue_setup(struct vb2_queue *vq, 438 unsigned int *num_buffers, unsigned int *num_planes, 439 unsigned int sizes[], struct device *alloc_devs[]) 440 { 441 struct camif_vp *vp = vb2_get_drv_priv(vq); 442 struct camif_frame *frame = &vp->out_frame; 443 const struct camif_fmt *fmt = vp->out_fmt; 444 unsigned int size; 445 446 if (fmt == NULL) 447 return -EINVAL; 448 449 size = (frame->f_width * frame->f_height * fmt->depth) / 8; 450 451 if (*num_planes) 452 return sizes[0] < size ? -EINVAL : 0; 453 454 *num_planes = 1; 455 sizes[0] = size; 456 457 pr_debug("size: %u\n", sizes[0]); 458 return 0; 459 } 460 461 static int buffer_prepare(struct vb2_buffer *vb) 462 { 463 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue); 464 465 if (vp->out_fmt == NULL) 466 return -EINVAL; 467 468 if (vb2_plane_size(vb, 0) < vp->payload) { 469 v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n", 470 vb2_plane_size(vb, 0), vp->payload); 471 return -EINVAL; 472 } 473 vb2_set_plane_payload(vb, 0, vp->payload); 474 475 return 0; 476 } 477 478 static void buffer_queue(struct vb2_buffer *vb) 479 { 480 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 481 struct camif_buffer *buf = container_of(vbuf, struct camif_buffer, vb); 482 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue); 483 struct camif_dev *camif = vp->camif; 484 unsigned long flags; 485 486 spin_lock_irqsave(&camif->slock, flags); 487 WARN_ON(camif_prepare_addr(vp, &buf->vb.vb2_buf, &buf->paddr)); 488 489 if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) { 490 /* Schedule an empty buffer in H/W */ 491 buf->index = vp->buf_index; 492 493 camif_hw_set_output_addr(vp, &buf->paddr, buf->index); 494 camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2); 495 496 camif_active_queue_add(vp, buf); 497 vp->buf_index = !vp->buf_index; 498 } else { 499 camif_pending_queue_add(vp, buf); 500 } 501 502 if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q) 503 && !(vp->state & ST_VP_STREAMING)) { 504 505 vp->state |= ST_VP_STREAMING; 506 camif_hw_enable_scaler(vp, vp->scaler.enable); 507 camif_hw_enable_capture(vp); 508 spin_unlock_irqrestore(&camif->slock, flags); 509 510 if (!(vp->state & ST_VP_SENSOR_STREAMING)) { 511 if (sensor_set_streaming(camif, 1) == 0) 512 vp->state |= ST_VP_SENSOR_STREAMING; 513 else 514 v4l2_err(&vp->vdev, "Sensor s_stream failed\n"); 515 516 if (debug) 517 camif_hw_dump_regs(camif, __func__); 518 } 519 return; 520 } 521 spin_unlock_irqrestore(&camif->slock, flags); 522 } 523 524 static const struct vb2_ops s3c_camif_qops = { 525 .queue_setup = queue_setup, 526 .buf_prepare = buffer_prepare, 527 .buf_queue = buffer_queue, 528 .start_streaming = start_streaming, 529 .stop_streaming = stop_streaming, 530 }; 531 532 static int s3c_camif_open(struct file *file) 533 { 534 struct camif_vp *vp = video_drvdata(file); 535 struct camif_dev *camif = vp->camif; 536 int ret; 537 538 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 539 vp->state, vp->owner, task_pid_nr(current)); 540 541 if (mutex_lock_interruptible(&camif->lock)) 542 return -ERESTARTSYS; 543 544 ret = v4l2_fh_open(file); 545 if (ret < 0) 546 goto unlock; 547 548 ret = pm_runtime_resume_and_get(camif->dev); 549 if (ret < 0) 550 goto err_pm; 551 552 ret = sensor_set_power(camif, 1); 553 if (!ret) 554 goto unlock; 555 556 pm_runtime_put(camif->dev); 557 err_pm: 558 v4l2_fh_release(file); 559 unlock: 560 mutex_unlock(&camif->lock); 561 return ret; 562 } 563 564 static int s3c_camif_close(struct file *file) 565 { 566 struct camif_vp *vp = video_drvdata(file); 567 struct camif_dev *camif = vp->camif; 568 int ret; 569 570 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 571 vp->state, vp->owner, task_pid_nr(current)); 572 573 mutex_lock(&camif->lock); 574 575 if (vp->owner == file->private_data) { 576 camif_stop_capture(vp); 577 vb2_queue_release(&vp->vb_queue); 578 vp->owner = NULL; 579 } 580 581 sensor_set_power(camif, 0); 582 583 pm_runtime_put(camif->dev); 584 ret = v4l2_fh_release(file); 585 586 mutex_unlock(&camif->lock); 587 return ret; 588 } 589 590 static __poll_t s3c_camif_poll(struct file *file, 591 struct poll_table_struct *wait) 592 { 593 struct camif_vp *vp = video_drvdata(file); 594 struct camif_dev *camif = vp->camif; 595 __poll_t ret; 596 597 mutex_lock(&camif->lock); 598 if (vp->owner && vp->owner != file->private_data) 599 ret = EPOLLERR; 600 else 601 ret = vb2_poll(&vp->vb_queue, file, wait); 602 603 mutex_unlock(&camif->lock); 604 return ret; 605 } 606 607 static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma) 608 { 609 struct camif_vp *vp = video_drvdata(file); 610 int ret; 611 612 if (vp->owner && vp->owner != file->private_data) 613 ret = -EBUSY; 614 else 615 ret = vb2_mmap(&vp->vb_queue, vma); 616 617 return ret; 618 } 619 620 static const struct v4l2_file_operations s3c_camif_fops = { 621 .owner = THIS_MODULE, 622 .open = s3c_camif_open, 623 .release = s3c_camif_close, 624 .poll = s3c_camif_poll, 625 .unlocked_ioctl = video_ioctl2, 626 .mmap = s3c_camif_mmap, 627 }; 628 629 /* 630 * Video node IOCTLs 631 */ 632 633 static int s3c_camif_vidioc_querycap(struct file *file, void *priv, 634 struct v4l2_capability *cap) 635 { 636 struct camif_vp *vp = video_drvdata(file); 637 638 strscpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver)); 639 strscpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card)); 640 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d", 641 dev_name(vp->camif->dev), vp->id); 642 return 0; 643 } 644 645 static int s3c_camif_vidioc_enum_input(struct file *file, void *priv, 646 struct v4l2_input *input) 647 { 648 struct camif_vp *vp = video_drvdata(file); 649 struct v4l2_subdev *sensor = vp->camif->sensor.sd; 650 651 if (input->index || sensor == NULL) 652 return -EINVAL; 653 654 input->type = V4L2_INPUT_TYPE_CAMERA; 655 strscpy(input->name, sensor->name, sizeof(input->name)); 656 return 0; 657 } 658 659 static int s3c_camif_vidioc_s_input(struct file *file, void *priv, 660 unsigned int i) 661 { 662 return i == 0 ? 0 : -EINVAL; 663 } 664 665 static int s3c_camif_vidioc_g_input(struct file *file, void *priv, 666 unsigned int *i) 667 { 668 *i = 0; 669 return 0; 670 } 671 672 static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv, 673 struct v4l2_fmtdesc *f) 674 { 675 struct camif_vp *vp = video_drvdata(file); 676 const struct camif_fmt *fmt; 677 678 fmt = s3c_camif_find_format(vp, NULL, f->index); 679 if (!fmt) 680 return -EINVAL; 681 682 f->pixelformat = fmt->fourcc; 683 return 0; 684 } 685 686 static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv, 687 struct v4l2_format *f) 688 { 689 struct camif_vp *vp = video_drvdata(file); 690 struct v4l2_pix_format *pix = &f->fmt.pix; 691 struct camif_frame *frame = &vp->out_frame; 692 const struct camif_fmt *fmt = vp->out_fmt; 693 694 pix->bytesperline = frame->f_width * fmt->ybpp; 695 pix->sizeimage = vp->payload; 696 697 pix->pixelformat = fmt->fourcc; 698 pix->width = frame->f_width; 699 pix->height = frame->f_height; 700 pix->field = V4L2_FIELD_NONE; 701 pix->colorspace = V4L2_COLORSPACE_JPEG; 702 703 return 0; 704 } 705 706 static int __camif_video_try_format(struct camif_vp *vp, 707 struct v4l2_pix_format *pix, 708 const struct camif_fmt **ffmt) 709 { 710 struct camif_dev *camif = vp->camif; 711 struct v4l2_rect *crop = &camif->camif_crop; 712 unsigned int wmin, hmin, sc_hrmax, sc_vrmax; 713 const struct vp_pix_limits *pix_lim; 714 const struct camif_fmt *fmt; 715 716 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0); 717 718 if (WARN_ON(fmt == NULL)) 719 return -EINVAL; 720 721 if (ffmt) 722 *ffmt = fmt; 723 724 pix_lim = &camif->variant->vp_pix_limits[vp->id]; 725 726 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n", 727 pix->width, pix->height, crop->width, crop->height, 728 pix->bytesperline); 729 /* 730 * Calculate minimum width and height according to the configured 731 * camera input interface crop rectangle and the resizer's capabilities. 732 */ 733 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3)); 734 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1)); 735 736 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax); 737 wmin = round_up(wmin, pix_lim->out_width_align); 738 hmin = max_t(u32, 8, crop->height / sc_vrmax); 739 hmin = round_up(hmin, 8); 740 741 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width, 742 ffs(pix_lim->out_width_align) - 1, 743 &pix->height, hmin, pix_lim->max_height, 0, 0); 744 745 pix->bytesperline = pix->width * fmt->ybpp; 746 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8; 747 pix->pixelformat = fmt->fourcc; 748 pix->colorspace = V4L2_COLORSPACE_JPEG; 749 pix->field = V4L2_FIELD_NONE; 750 751 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n", 752 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax); 753 754 return 0; 755 } 756 757 static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv, 758 struct v4l2_format *f) 759 { 760 struct camif_vp *vp = video_drvdata(file); 761 return __camif_video_try_format(vp, &f->fmt.pix, NULL); 762 } 763 764 static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv, 765 struct v4l2_format *f) 766 { 767 struct v4l2_pix_format *pix = &f->fmt.pix; 768 struct camif_vp *vp = video_drvdata(file); 769 struct camif_frame *out_frame = &vp->out_frame; 770 const struct camif_fmt *fmt = NULL; 771 int ret; 772 773 pr_debug("[vp%d]\n", vp->id); 774 775 if (vb2_is_busy(&vp->vb_queue)) 776 return -EBUSY; 777 778 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt); 779 if (ret < 0) 780 return ret; 781 782 vp->out_fmt = fmt; 783 vp->payload = pix->sizeimage; 784 out_frame->f_width = pix->width; 785 out_frame->f_height = pix->height; 786 787 /* Reset composition rectangle */ 788 out_frame->rect.width = pix->width; 789 out_frame->rect.height = pix->height; 790 out_frame->rect.left = 0; 791 out_frame->rect.top = 0; 792 793 if (vp->owner == NULL) 794 vp->owner = priv; 795 796 pr_debug("%ux%u. payload: %u. fmt: 0x%08x. %d %d. sizeimage: %d. bpl: %d\n", 797 out_frame->f_width, out_frame->f_height, vp->payload, 798 fmt->fourcc, pix->width * pix->height * fmt->depth, 799 fmt->depth, pix->sizeimage, pix->bytesperline); 800 801 return 0; 802 } 803 804 /* Only check pixel formats at the sensor and the camif subdev pads */ 805 static int camif_pipeline_validate(struct camif_dev *camif) 806 { 807 struct v4l2_subdev_format src_fmt = { 808 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 809 }; 810 struct media_pad *pad; 811 int ret; 812 813 /* Retrieve format at the sensor subdev source pad */ 814 pad = media_pad_remote_pad_first(&camif->pads[0]); 815 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 816 return -EPIPE; 817 818 src_fmt.pad = pad->index; 819 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt); 820 if (ret < 0 && ret != -ENOIOCTLCMD) 821 return -EPIPE; 822 823 if (src_fmt.format.width != camif->mbus_fmt.width || 824 src_fmt.format.height != camif->mbus_fmt.height || 825 src_fmt.format.code != camif->mbus_fmt.code) 826 return -EPIPE; 827 828 return 0; 829 } 830 831 static int s3c_camif_streamon(struct file *file, void *priv, 832 enum v4l2_buf_type type) 833 { 834 struct camif_vp *vp = video_drvdata(file); 835 struct camif_dev *camif = vp->camif; 836 struct media_entity *sensor = &camif->sensor.sd->entity; 837 int ret; 838 839 pr_debug("[vp%d]\n", vp->id); 840 841 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 842 return -EINVAL; 843 844 if (vp->owner && vp->owner != priv) 845 return -EBUSY; 846 847 if (s3c_vp_active(vp)) 848 return 0; 849 850 ret = media_pipeline_start(sensor->pads, camif->m_pipeline); 851 if (ret < 0) 852 return ret; 853 854 ret = camif_pipeline_validate(camif); 855 if (ret < 0) { 856 media_pipeline_stop(sensor->pads); 857 return ret; 858 } 859 860 return vb2_streamon(&vp->vb_queue, type); 861 } 862 863 static int s3c_camif_streamoff(struct file *file, void *priv, 864 enum v4l2_buf_type type) 865 { 866 struct camif_vp *vp = video_drvdata(file); 867 struct camif_dev *camif = vp->camif; 868 int ret; 869 870 pr_debug("[vp%d]\n", vp->id); 871 872 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 873 return -EINVAL; 874 875 if (vp->owner && vp->owner != priv) 876 return -EBUSY; 877 878 ret = vb2_streamoff(&vp->vb_queue, type); 879 if (ret == 0) 880 media_pipeline_stop(camif->sensor.sd->entity.pads); 881 return ret; 882 } 883 884 static int s3c_camif_reqbufs(struct file *file, void *priv, 885 struct v4l2_requestbuffers *rb) 886 { 887 struct camif_vp *vp = video_drvdata(file); 888 int ret; 889 890 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n", 891 vp->id, rb->count, vp->owner, priv); 892 893 if (vp->owner && vp->owner != priv) 894 return -EBUSY; 895 896 if (rb->count) 897 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count); 898 else 899 vp->owner = NULL; 900 901 ret = vb2_reqbufs(&vp->vb_queue, rb); 902 if (ret < 0) 903 return ret; 904 905 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) { 906 rb->count = 0; 907 vb2_reqbufs(&vp->vb_queue, rb); 908 ret = -ENOMEM; 909 } 910 911 vp->reqbufs_count = rb->count; 912 if (vp->owner == NULL && rb->count > 0) 913 vp->owner = priv; 914 915 return ret; 916 } 917 918 static int s3c_camif_querybuf(struct file *file, void *priv, 919 struct v4l2_buffer *buf) 920 { 921 struct camif_vp *vp = video_drvdata(file); 922 return vb2_querybuf(&vp->vb_queue, buf); 923 } 924 925 static int s3c_camif_qbuf(struct file *file, void *priv, 926 struct v4l2_buffer *buf) 927 { 928 struct camif_vp *vp = video_drvdata(file); 929 930 pr_debug("[vp%d]\n", vp->id); 931 932 if (vp->owner && vp->owner != priv) 933 return -EBUSY; 934 935 return vb2_qbuf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, buf); 936 } 937 938 static int s3c_camif_dqbuf(struct file *file, void *priv, 939 struct v4l2_buffer *buf) 940 { 941 struct camif_vp *vp = video_drvdata(file); 942 943 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence); 944 945 if (vp->owner && vp->owner != priv) 946 return -EBUSY; 947 948 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK); 949 } 950 951 static int s3c_camif_create_bufs(struct file *file, void *priv, 952 struct v4l2_create_buffers *create) 953 { 954 struct camif_vp *vp = video_drvdata(file); 955 int ret; 956 957 if (vp->owner && vp->owner != priv) 958 return -EBUSY; 959 960 create->count = max_t(u32, 1, create->count); 961 ret = vb2_create_bufs(&vp->vb_queue, create); 962 963 if (!ret && vp->owner == NULL) 964 vp->owner = priv; 965 966 return ret; 967 } 968 969 static int s3c_camif_prepare_buf(struct file *file, void *priv, 970 struct v4l2_buffer *b) 971 { 972 struct camif_vp *vp = video_drvdata(file); 973 return vb2_prepare_buf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, b); 974 } 975 976 static int s3c_camif_g_selection(struct file *file, void *priv, 977 struct v4l2_selection *sel) 978 { 979 struct camif_vp *vp = video_drvdata(file); 980 981 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 982 return -EINVAL; 983 984 switch (sel->target) { 985 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 986 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 987 sel->r.left = 0; 988 sel->r.top = 0; 989 sel->r.width = vp->out_frame.f_width; 990 sel->r.height = vp->out_frame.f_height; 991 return 0; 992 993 case V4L2_SEL_TGT_COMPOSE: 994 sel->r = vp->out_frame.rect; 995 return 0; 996 } 997 998 return -EINVAL; 999 } 1000 1001 static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp, 1002 struct v4l2_rect *r) 1003 { 1004 /* s3c244x doesn't support composition */ 1005 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) { 1006 *r = vp->out_frame.rect; 1007 return; 1008 } 1009 1010 /* TODO: s3c64xx */ 1011 } 1012 1013 static int s3c_camif_s_selection(struct file *file, void *priv, 1014 struct v4l2_selection *sel) 1015 { 1016 struct camif_vp *vp = video_drvdata(file); 1017 struct camif_dev *camif = vp->camif; 1018 struct v4l2_rect rect = sel->r; 1019 unsigned long flags; 1020 1021 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || 1022 sel->target != V4L2_SEL_TGT_COMPOSE) 1023 return -EINVAL; 1024 1025 __camif_try_compose(camif, vp, &rect); 1026 1027 sel->r = rect; 1028 spin_lock_irqsave(&camif->slock, flags); 1029 vp->out_frame.rect = rect; 1030 vp->state |= ST_VP_CONFIG; 1031 spin_unlock_irqrestore(&camif->slock, flags); 1032 1033 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n", 1034 sel->type, sel->target, sel->flags, 1035 sel->r.left, sel->r.top, sel->r.width, sel->r.height); 1036 1037 return 0; 1038 } 1039 1040 static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = { 1041 .vidioc_querycap = s3c_camif_vidioc_querycap, 1042 .vidioc_enum_input = s3c_camif_vidioc_enum_input, 1043 .vidioc_g_input = s3c_camif_vidioc_g_input, 1044 .vidioc_s_input = s3c_camif_vidioc_s_input, 1045 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt, 1046 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt, 1047 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt, 1048 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt, 1049 .vidioc_g_selection = s3c_camif_g_selection, 1050 .vidioc_s_selection = s3c_camif_s_selection, 1051 .vidioc_reqbufs = s3c_camif_reqbufs, 1052 .vidioc_querybuf = s3c_camif_querybuf, 1053 .vidioc_prepare_buf = s3c_camif_prepare_buf, 1054 .vidioc_create_bufs = s3c_camif_create_bufs, 1055 .vidioc_qbuf = s3c_camif_qbuf, 1056 .vidioc_dqbuf = s3c_camif_dqbuf, 1057 .vidioc_streamon = s3c_camif_streamon, 1058 .vidioc_streamoff = s3c_camif_streamoff, 1059 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1060 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1061 .vidioc_log_status = v4l2_ctrl_log_status, 1062 }; 1063 1064 /* 1065 * Video node controls 1066 */ 1067 static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl) 1068 { 1069 struct camif_vp *vp = ctrl->priv; 1070 struct camif_dev *camif = vp->camif; 1071 unsigned long flags; 1072 1073 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id, 1074 ctrl->name, ctrl->val); 1075 1076 spin_lock_irqsave(&camif->slock, flags); 1077 1078 switch (ctrl->id) { 1079 case V4L2_CID_HFLIP: 1080 vp->hflip = ctrl->val; 1081 break; 1082 1083 case V4L2_CID_VFLIP: 1084 vp->vflip = ctrl->val; 1085 break; 1086 } 1087 1088 vp->state |= ST_VP_CONFIG; 1089 spin_unlock_irqrestore(&camif->slock, flags); 1090 return 0; 1091 } 1092 1093 /* Codec and preview video node control ops */ 1094 static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = { 1095 .s_ctrl = s3c_camif_video_s_ctrl, 1096 }; 1097 1098 int s3c_camif_register_video_node(struct camif_dev *camif, int idx) 1099 { 1100 struct camif_vp *vp = &camif->vp[idx]; 1101 struct vb2_queue *q = &vp->vb_queue; 1102 struct video_device *vfd = &vp->vdev; 1103 struct v4l2_ctrl *ctrl; 1104 int ret; 1105 1106 memset(vfd, 0, sizeof(*vfd)); 1107 snprintf(vfd->name, sizeof(vfd->name), "camif-%s", 1108 vp->id == 0 ? "codec" : "preview"); 1109 1110 vfd->fops = &s3c_camif_fops; 1111 vfd->ioctl_ops = &s3c_camif_ioctl_ops; 1112 vfd->v4l2_dev = &camif->v4l2_dev; 1113 vfd->minor = -1; 1114 vfd->release = video_device_release_empty; 1115 vfd->lock = &camif->lock; 1116 vp->reqbufs_count = 0; 1117 1118 INIT_LIST_HEAD(&vp->pending_buf_q); 1119 INIT_LIST_HEAD(&vp->active_buf_q); 1120 1121 memset(q, 0, sizeof(*q)); 1122 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1123 q->io_modes = VB2_MMAP | VB2_USERPTR; 1124 q->ops = &s3c_camif_qops; 1125 q->mem_ops = &vb2_dma_contig_memops; 1126 q->buf_struct_size = sizeof(struct camif_buffer); 1127 q->drv_priv = vp; 1128 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1129 q->lock = &vp->camif->lock; 1130 q->dev = camif->v4l2_dev.dev; 1131 1132 ret = vb2_queue_init(q); 1133 if (ret) 1134 return ret; 1135 1136 vp->pad.flags = MEDIA_PAD_FL_SINK; 1137 ret = media_entity_pads_init(&vfd->entity, 1, &vp->pad); 1138 if (ret) 1139 return ret; 1140 1141 video_set_drvdata(vfd, vp); 1142 1143 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1); 1144 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1145 V4L2_CID_HFLIP, 0, 1, 1, 0); 1146 if (ctrl) 1147 ctrl->priv = vp; 1148 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1149 V4L2_CID_VFLIP, 0, 1, 1, 0); 1150 if (ctrl) 1151 ctrl->priv = vp; 1152 1153 ret = vp->ctrl_handler.error; 1154 if (ret < 0) 1155 goto err_me_cleanup; 1156 1157 vfd->ctrl_handler = &vp->ctrl_handler; 1158 vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; 1159 1160 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1); 1161 if (ret) 1162 goto err_ctrlh_free; 1163 1164 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n", 1165 vfd->name, video_device_node_name(vfd)); 1166 return 0; 1167 1168 err_ctrlh_free: 1169 v4l2_ctrl_handler_free(&vp->ctrl_handler); 1170 err_me_cleanup: 1171 media_entity_cleanup(&vfd->entity); 1172 return ret; 1173 } 1174 1175 void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx) 1176 { 1177 struct video_device *vfd = &camif->vp[idx].vdev; 1178 1179 if (video_is_registered(vfd)) { 1180 video_unregister_device(vfd); 1181 media_entity_cleanup(&vfd->entity); 1182 v4l2_ctrl_handler_free(vfd->ctrl_handler); 1183 } 1184 } 1185 1186 /* Media bus pixel formats supported at the camif input */ 1187 static const u32 camif_mbus_formats[] = { 1188 MEDIA_BUS_FMT_YUYV8_2X8, 1189 MEDIA_BUS_FMT_YVYU8_2X8, 1190 MEDIA_BUS_FMT_UYVY8_2X8, 1191 MEDIA_BUS_FMT_VYUY8_2X8, 1192 }; 1193 1194 /* 1195 * Camera input interface subdev operations 1196 */ 1197 1198 static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd, 1199 struct v4l2_subdev_state *sd_state, 1200 struct v4l2_subdev_mbus_code_enum *code) 1201 { 1202 if (code->index >= ARRAY_SIZE(camif_mbus_formats)) 1203 return -EINVAL; 1204 1205 code->code = camif_mbus_formats[code->index]; 1206 return 0; 1207 } 1208 1209 static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd, 1210 struct v4l2_subdev_state *sd_state, 1211 struct v4l2_subdev_format *fmt) 1212 { 1213 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1214 struct v4l2_mbus_framefmt *mf = &fmt->format; 1215 1216 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1217 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 1218 fmt->format = *mf; 1219 return 0; 1220 } 1221 1222 mutex_lock(&camif->lock); 1223 1224 switch (fmt->pad) { 1225 case CAMIF_SD_PAD_SINK: 1226 /* full camera input pixel size */ 1227 *mf = camif->mbus_fmt; 1228 break; 1229 1230 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1231 /* crop rectangle at camera interface input */ 1232 mf->width = camif->camif_crop.width; 1233 mf->height = camif->camif_crop.height; 1234 mf->code = camif->mbus_fmt.code; 1235 break; 1236 } 1237 1238 mutex_unlock(&camif->lock); 1239 mf->field = V4L2_FIELD_NONE; 1240 mf->colorspace = V4L2_COLORSPACE_JPEG; 1241 return 0; 1242 } 1243 1244 static void __camif_subdev_try_format(struct camif_dev *camif, 1245 struct v4l2_mbus_framefmt *mf, int pad) 1246 { 1247 const struct s3c_camif_variant *variant = camif->variant; 1248 const struct vp_pix_limits *pix_lim; 1249 unsigned int i; 1250 1251 /* FIXME: constraints against codec or preview path ? */ 1252 pix_lim = &variant->vp_pix_limits[VP_CODEC]; 1253 1254 for (i = 0; i < ARRAY_SIZE(camif_mbus_formats); i++) 1255 if (camif_mbus_formats[i] == mf->code) 1256 break; 1257 1258 if (i == ARRAY_SIZE(camif_mbus_formats)) 1259 mf->code = camif_mbus_formats[0]; 1260 1261 if (pad == CAMIF_SD_PAD_SINK) { 1262 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH, 1263 ffs(pix_lim->out_width_align) - 1, 1264 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0, 1265 0); 1266 } else { 1267 struct v4l2_rect *crop = &camif->camif_crop; 1268 v4l_bound_align_image(&mf->width, 8, crop->width, 1269 ffs(pix_lim->out_width_align) - 1, 1270 &mf->height, 8, crop->height, 1271 0, 0); 1272 } 1273 1274 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height); 1275 } 1276 1277 static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd, 1278 struct v4l2_subdev_state *sd_state, 1279 struct v4l2_subdev_format *fmt) 1280 { 1281 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1282 struct v4l2_mbus_framefmt *mf = &fmt->format; 1283 struct v4l2_rect *crop = &camif->camif_crop; 1284 int i; 1285 1286 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n", 1287 fmt->pad, mf->code, mf->width, mf->height); 1288 1289 mf->field = V4L2_FIELD_NONE; 1290 mf->colorspace = V4L2_COLORSPACE_JPEG; 1291 mutex_lock(&camif->lock); 1292 1293 /* 1294 * No pixel format change at the camera input is allowed 1295 * while streaming. 1296 */ 1297 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) || 1298 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) { 1299 mutex_unlock(&camif->lock); 1300 return -EBUSY; 1301 } 1302 1303 __camif_subdev_try_format(camif, mf, fmt->pad); 1304 1305 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1306 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 1307 *mf = fmt->format; 1308 mutex_unlock(&camif->lock); 1309 return 0; 1310 } 1311 1312 switch (fmt->pad) { 1313 case CAMIF_SD_PAD_SINK: 1314 camif->mbus_fmt = *mf; 1315 /* Reset sink crop rectangle. */ 1316 crop->width = mf->width; 1317 crop->height = mf->height; 1318 crop->left = 0; 1319 crop->top = 0; 1320 /* 1321 * Reset source format (the camif's crop rectangle) 1322 * and the video output resolution. 1323 */ 1324 for (i = 0; i < CAMIF_VP_NUM; i++) { 1325 struct camif_frame *frame = &camif->vp[i].out_frame; 1326 frame->rect = *crop; 1327 frame->f_width = mf->width; 1328 frame->f_height = mf->height; 1329 } 1330 break; 1331 1332 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1333 /* Pixel format can be only changed on the sink pad. */ 1334 mf->code = camif->mbus_fmt.code; 1335 mf->width = crop->width; 1336 mf->height = crop->height; 1337 break; 1338 } 1339 1340 mutex_unlock(&camif->lock); 1341 return 0; 1342 } 1343 1344 static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd, 1345 struct v4l2_subdev_state *sd_state, 1346 struct v4l2_subdev_selection *sel) 1347 { 1348 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1349 struct v4l2_rect *crop = &camif->camif_crop; 1350 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1351 1352 if ((sel->target != V4L2_SEL_TGT_CROP && 1353 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) || 1354 sel->pad != CAMIF_SD_PAD_SINK) 1355 return -EINVAL; 1356 1357 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1358 sel->r = *v4l2_subdev_state_get_crop(sd_state, sel->pad); 1359 return 0; 1360 } 1361 1362 mutex_lock(&camif->lock); 1363 1364 if (sel->target == V4L2_SEL_TGT_CROP) { 1365 sel->r = *crop; 1366 } else { /* crop bounds */ 1367 sel->r.width = mf->width; 1368 sel->r.height = mf->height; 1369 sel->r.left = 0; 1370 sel->r.top = 0; 1371 } 1372 1373 mutex_unlock(&camif->lock); 1374 1375 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n", 1376 __func__, crop->left, crop->top, crop->width, 1377 crop->height, mf->width, mf->height); 1378 1379 return 0; 1380 } 1381 1382 static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r) 1383 { 1384 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1385 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits; 1386 unsigned int left = 2 * r->left; 1387 unsigned int top = 2 * r->top; 1388 1389 /* 1390 * Following constraints must be met: 1391 * - r->width + 2 * r->left = mf->width; 1392 * - r->height + 2 * r->top = mf->height; 1393 * - crop rectangle size and position must be aligned 1394 * to 8 or 2 pixels, depending on SoC version. 1395 */ 1396 v4l_bound_align_image(&r->width, 0, mf->width, 1397 ffs(pix_lim->win_hor_offset_align) - 1, 1398 &r->height, 0, mf->height, 1, 0); 1399 1400 v4l_bound_align_image(&left, 0, mf->width - r->width, 1401 ffs(pix_lim->win_hor_offset_align), 1402 &top, 0, mf->height - r->height, 2, 0); 1403 1404 r->left = left / 2; 1405 r->top = top / 2; 1406 r->width = mf->width - left; 1407 r->height = mf->height - top; 1408 /* 1409 * Make sure we either downscale or upscale both the pixel 1410 * width and height. Just return current crop rectangle if 1411 * this scaler constraint is not met. 1412 */ 1413 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV && 1414 camif_is_streaming(camif)) { 1415 unsigned int i; 1416 1417 for (i = 0; i < CAMIF_VP_NUM; i++) { 1418 struct v4l2_rect *or = &camif->vp[i].out_frame.rect; 1419 if ((or->width > r->width) == (or->height > r->height)) 1420 continue; 1421 *r = camif->camif_crop; 1422 pr_debug("Width/height scaling direction limitation\n"); 1423 break; 1424 } 1425 } 1426 1427 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n", 1428 r->left, r->top, r->width, r->height, mf->width, mf->height); 1429 } 1430 1431 static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd, 1432 struct v4l2_subdev_state *sd_state, 1433 struct v4l2_subdev_selection *sel) 1434 { 1435 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1436 struct v4l2_rect *crop = &camif->camif_crop; 1437 struct camif_scaler scaler; 1438 1439 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK) 1440 return -EINVAL; 1441 1442 mutex_lock(&camif->lock); 1443 __camif_try_crop(camif, &sel->r); 1444 1445 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1446 *v4l2_subdev_state_get_crop(sd_state, sel->pad) = sel->r; 1447 } else { 1448 unsigned long flags; 1449 unsigned int i; 1450 1451 spin_lock_irqsave(&camif->slock, flags); 1452 *crop = sel->r; 1453 1454 for (i = 0; i < CAMIF_VP_NUM; i++) { 1455 struct camif_vp *vp = &camif->vp[i]; 1456 scaler = vp->scaler; 1457 if (s3c_camif_get_scaler_config(vp, &scaler)) 1458 continue; 1459 vp->scaler = scaler; 1460 vp->state |= ST_VP_CONFIG; 1461 } 1462 1463 spin_unlock_irqrestore(&camif->slock, flags); 1464 } 1465 mutex_unlock(&camif->lock); 1466 1467 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n", 1468 __func__, crop->left, crop->top, crop->width, crop->height, 1469 camif->mbus_fmt.width, camif->mbus_fmt.height); 1470 1471 return 0; 1472 } 1473 1474 static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = { 1475 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code, 1476 .get_selection = s3c_camif_subdev_get_selection, 1477 .set_selection = s3c_camif_subdev_set_selection, 1478 .get_fmt = s3c_camif_subdev_get_fmt, 1479 .set_fmt = s3c_camif_subdev_set_fmt, 1480 }; 1481 1482 static const struct v4l2_subdev_ops s3c_camif_subdev_ops = { 1483 .pad = &s3c_camif_subdev_pad_ops, 1484 }; 1485 1486 static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl) 1487 { 1488 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev, 1489 ctrl_handler); 1490 unsigned long flags; 1491 1492 spin_lock_irqsave(&camif->slock, flags); 1493 1494 switch (ctrl->id) { 1495 case V4L2_CID_COLORFX: 1496 camif->colorfx = camif->ctrl_colorfx->val; 1497 /* Set Cb, Cr */ 1498 switch (ctrl->val) { 1499 case V4L2_COLORFX_SEPIA: 1500 camif->colorfx_cb = 115; 1501 camif->colorfx_cr = 145; 1502 break; 1503 case V4L2_COLORFX_SET_CBCR: 1504 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8; 1505 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff; 1506 break; 1507 default: 1508 /* for V4L2_COLORFX_BW and others */ 1509 camif->colorfx_cb = 128; 1510 camif->colorfx_cr = 128; 1511 } 1512 break; 1513 case V4L2_CID_TEST_PATTERN: 1514 camif->test_pattern = camif->ctrl_test_pattern->val; 1515 break; 1516 default: 1517 WARN_ON(1); 1518 } 1519 1520 camif->vp[VP_CODEC].state |= ST_VP_CONFIG; 1521 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG; 1522 spin_unlock_irqrestore(&camif->slock, flags); 1523 1524 return 0; 1525 } 1526 1527 static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = { 1528 .s_ctrl = s3c_camif_subdev_s_ctrl, 1529 }; 1530 1531 static const char * const s3c_camif_test_pattern_menu[] = { 1532 "Disabled", 1533 "Color bars", 1534 "Horizontal increment", 1535 "Vertical increment", 1536 }; 1537 1538 int s3c_camif_create_subdev(struct camif_dev *camif) 1539 { 1540 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler; 1541 struct v4l2_subdev *sd = &camif->subdev; 1542 int ret; 1543 1544 v4l2_subdev_init(sd, &s3c_camif_subdev_ops); 1545 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1546 strscpy(sd->name, "S3C-CAMIF", sizeof(sd->name)); 1547 1548 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 1549 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE; 1550 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE; 1551 1552 ret = media_entity_pads_init(&sd->entity, CAMIF_SD_PADS_NUM, 1553 camif->pads); 1554 if (ret) 1555 return ret; 1556 1557 v4l2_ctrl_handler_init(handler, 3); 1558 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler, 1559 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN, 1560 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0, 1561 s3c_camif_test_pattern_menu); 1562 1563 if (camif->variant->has_img_effect) { 1564 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler, 1565 &s3c_camif_subdev_ctrl_ops, 1566 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR, 1567 ~0x981f, V4L2_COLORFX_NONE); 1568 1569 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler, 1570 &s3c_camif_subdev_ctrl_ops, 1571 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0); 1572 } 1573 1574 if (handler->error) { 1575 v4l2_ctrl_handler_free(handler); 1576 media_entity_cleanup(&sd->entity); 1577 return handler->error; 1578 } 1579 1580 if (camif->variant->has_img_effect) 1581 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx, 1582 V4L2_COLORFX_SET_CBCR, false); 1583 1584 sd->ctrl_handler = handler; 1585 v4l2_set_subdevdata(sd, camif); 1586 1587 return 0; 1588 } 1589 1590 void s3c_camif_unregister_subdev(struct camif_dev *camif) 1591 { 1592 struct v4l2_subdev *sd = &camif->subdev; 1593 1594 /* Return if not registered */ 1595 if (v4l2_get_subdevdata(sd) == NULL) 1596 return; 1597 1598 v4l2_device_unregister_subdev(sd); 1599 media_entity_cleanup(&sd->entity); 1600 v4l2_ctrl_handler_free(&camif->ctrl_handler); 1601 v4l2_set_subdevdata(sd, NULL); 1602 } 1603 1604 int s3c_camif_set_defaults(struct camif_dev *camif) 1605 { 1606 unsigned int ip_rev = camif->variant->ip_revision; 1607 int i; 1608 1609 for (i = 0; i < CAMIF_VP_NUM; i++) { 1610 struct camif_vp *vp = &camif->vp[i]; 1611 struct camif_frame *f = &vp->out_frame; 1612 1613 vp->camif = camif; 1614 vp->id = i; 1615 vp->offset = camif->variant->vp_offset; 1616 1617 if (ip_rev == S3C244X_CAMIF_IP_REV) 1618 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW : 1619 FMT_FL_S3C24XX_CODEC; 1620 else 1621 vp->fmt_flags = FMT_FL_S3C64XX; 1622 1623 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0); 1624 BUG_ON(vp->out_fmt == NULL); 1625 1626 memset(f, 0, sizeof(*f)); 1627 f->f_width = CAMIF_DEF_WIDTH; 1628 f->f_height = CAMIF_DEF_HEIGHT; 1629 f->rect.width = CAMIF_DEF_WIDTH; 1630 f->rect.height = CAMIF_DEF_HEIGHT; 1631 1632 /* Scaler is always enabled */ 1633 vp->scaler.enable = 1; 1634 1635 vp->payload = (f->f_width * f->f_height * 1636 vp->out_fmt->depth) / 8; 1637 } 1638 1639 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt)); 1640 camif->mbus_fmt.width = CAMIF_DEF_WIDTH; 1641 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT; 1642 camif->mbus_fmt.code = camif_mbus_formats[0]; 1643 1644 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop)); 1645 camif->camif_crop.width = CAMIF_DEF_WIDTH; 1646 camif->camif_crop.height = CAMIF_DEF_HEIGHT; 1647 1648 return 0; 1649 } 1650