1/* 2 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver 3 * 4 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com> 5 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com> 6 * 7 * Based on drivers/media/platform/s5p-fimc, 8 * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13*/ 14#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__ 15 16#include <linux/bug.h> 17#include <linux/clk.h> 18#include <linux/device.h> 19#include <linux/errno.h> 20#include <linux/i2c.h> 21#include <linux/interrupt.h> 22#include <linux/io.h> 23#include <linux/kernel.h> 24#include <linux/list.h> 25#include <linux/module.h> 26#include <linux/platform_device.h> 27#include <linux/pm_runtime.h> 28#include <linux/ratelimit.h> 29#include <linux/slab.h> 30#include <linux/types.h> 31#include <linux/videodev2.h> 32 33#include <media/media-device.h> 34#include <media/v4l2-ctrls.h> 35#include <media/v4l2-event.h> 36#include <media/v4l2-ioctl.h> 37#include <media/videobuf2-core.h> 38#include <media/videobuf2-dma-contig.h> 39 40#include "camif-core.h" 41#include "camif-regs.h" 42 43static int debug; 44module_param(debug, int, 0644); 45 46/* Locking: called with vp->camif->slock spinlock held */ 47static void camif_cfg_video_path(struct camif_vp *vp) 48{ 49 WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler)); 50 camif_hw_set_scaler(vp); 51 camif_hw_set_flip(vp); 52 camif_hw_set_target_format(vp); 53 camif_hw_set_output_dma(vp); 54} 55 56static void camif_prepare_dma_offset(struct camif_vp *vp) 57{ 58 struct camif_frame *f = &vp->out_frame; 59 60 f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left; 61 f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width); 62 63 pr_debug("dma_offset: initial: %d, line: %d\n", 64 f->dma_offset.initial, f->dma_offset.line); 65} 66 67/* Locking: called with camif->slock spinlock held */ 68static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp) 69{ 70 const struct s3c_camif_variant *variant = camif->variant; 71 72 if (camif->sensor.sd == NULL || vp->out_fmt == NULL) 73 return -EINVAL; 74 75 if (variant->ip_revision == S3C244X_CAMIF_IP_REV) 76 camif_hw_clear_fifo_overflow(vp); 77 camif_hw_set_camera_bus(camif); 78 camif_hw_set_source_format(camif); 79 camif_hw_set_camera_crop(camif); 80 camif_hw_set_test_pattern(camif, camif->test_pattern); 81 if (variant->has_img_effect) 82 camif_hw_set_effect(camif, camif->colorfx, 83 camif->colorfx_cb, camif->colorfx_cr); 84 if (variant->ip_revision == S3C6410_CAMIF_IP_REV) 85 camif_hw_set_input_path(vp); 86 camif_cfg_video_path(vp); 87 vp->state &= ~ST_VP_CONFIG; 88 89 return 0; 90} 91 92/* 93 * Initialize the video path, only up from the scaler stage. The camera 94 * input interface set up is skipped. This is useful to enable one of the 95 * video paths when the other is already running. 96 * Locking: called with camif->slock spinlock held. 97 */ 98static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp) 99{ 100 unsigned int ip_rev = camif->variant->ip_revision; 101 102 if (vp->out_fmt == NULL) 103 return -EINVAL; 104 105 camif_prepare_dma_offset(vp); 106 if (ip_rev == S3C244X_CAMIF_IP_REV) 107 camif_hw_clear_fifo_overflow(vp); 108 camif_cfg_video_path(vp); 109 vp->state &= ~ST_VP_CONFIG; 110 return 0; 111} 112 113static int sensor_set_power(struct camif_dev *camif, int on) 114{ 115 struct cam_sensor *sensor = &camif->sensor; 116 int err = 0; 117 118 if (!on == camif->sensor.power_count) 119 err = v4l2_subdev_call(sensor->sd, core, s_power, on); 120 if (!err) 121 sensor->power_count += on ? 1 : -1; 122 123 pr_debug("on: %d, power_count: %d, err: %d\n", 124 on, sensor->power_count, err); 125 126 return err; 127} 128 129static int sensor_set_streaming(struct camif_dev *camif, int on) 130{ 131 struct cam_sensor *sensor = &camif->sensor; 132 int err = 0; 133 134 if (!on == camif->sensor.stream_count) 135 err = v4l2_subdev_call(sensor->sd, video, s_stream, on); 136 if (!err) 137 sensor->stream_count += on ? 1 : -1; 138 139 pr_debug("on: %d, stream_count: %d, err: %d\n", 140 on, sensor->stream_count, err); 141 142 return err; 143} 144 145/* 146 * Reinitialize the driver so it is ready to start streaming again. 147 * Return any buffers to vb2, perform CAMIF software reset and 148 * turn off streaming at the data pipeline (sensor) if required. 149 */ 150static int camif_reinitialize(struct camif_vp *vp) 151{ 152 struct camif_dev *camif = vp->camif; 153 struct camif_buffer *buf; 154 unsigned long flags; 155 bool streaming; 156 157 spin_lock_irqsave(&camif->slock, flags); 158 streaming = vp->state & ST_VP_SENSOR_STREAMING; 159 160 vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF | 161 ST_VP_ABORTING | ST_VP_STREAMING | 162 ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ); 163 164 /* Release unused buffers */ 165 while (!list_empty(&vp->pending_buf_q)) { 166 buf = camif_pending_queue_pop(vp); 167 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); 168 } 169 170 while (!list_empty(&vp->active_buf_q)) { 171 buf = camif_active_queue_pop(vp); 172 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); 173 } 174 175 spin_unlock_irqrestore(&camif->slock, flags); 176 177 if (!streaming) 178 return 0; 179 180 return sensor_set_streaming(camif, 0); 181} 182 183static bool s3c_vp_active(struct camif_vp *vp) 184{ 185 struct camif_dev *camif = vp->camif; 186 unsigned long flags; 187 bool ret; 188 189 spin_lock_irqsave(&camif->slock, flags); 190 ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING); 191 spin_unlock_irqrestore(&camif->slock, flags); 192 193 return ret; 194} 195 196static bool camif_is_streaming(struct camif_dev *camif) 197{ 198 unsigned long flags; 199 bool status; 200 201 spin_lock_irqsave(&camif->slock, flags); 202 status = camif->stream_count > 0; 203 spin_unlock_irqrestore(&camif->slock, flags); 204 205 return status; 206} 207 208static int camif_stop_capture(struct camif_vp *vp) 209{ 210 struct camif_dev *camif = vp->camif; 211 unsigned long flags; 212 int ret; 213 214 if (!s3c_vp_active(vp)) 215 return 0; 216 217 spin_lock_irqsave(&camif->slock, flags); 218 vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ); 219 vp->state |= ST_VP_ABORTING; 220 spin_unlock_irqrestore(&camif->slock, flags); 221 222 ret = wait_event_timeout(vp->irq_queue, 223 !(vp->state & ST_VP_ABORTING), 224 msecs_to_jiffies(CAMIF_STOP_TIMEOUT)); 225 226 spin_lock_irqsave(&camif->slock, flags); 227 228 if (ret == 0 && !(vp->state & ST_VP_OFF)) { 229 /* Timed out, forcibly stop capture */ 230 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING | 231 ST_VP_LASTIRQ); 232 233 camif_hw_disable_capture(vp); 234 camif_hw_enable_scaler(vp, false); 235 } 236 237 spin_unlock_irqrestore(&camif->slock, flags); 238 239 return camif_reinitialize(vp); 240} 241 242static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb, 243 struct camif_addr *paddr) 244{ 245 struct camif_frame *frame = &vp->out_frame; 246 u32 pix_size; 247 248 if (vb == NULL || frame == NULL) 249 return -EINVAL; 250 251 pix_size = frame->rect.width * frame->rect.height; 252 253 pr_debug("colplanes: %d, pix_size: %u\n", 254 vp->out_fmt->colplanes, pix_size); 255 256 paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0); 257 258 switch (vp->out_fmt->colplanes) { 259 case 1: 260 paddr->cb = 0; 261 paddr->cr = 0; 262 break; 263 case 2: 264 /* decompose Y into Y/Cb */ 265 paddr->cb = (u32)(paddr->y + pix_size); 266 paddr->cr = 0; 267 break; 268 case 3: 269 paddr->cb = (u32)(paddr->y + pix_size); 270 /* decompose Y into Y/Cb/Cr */ 271 if (vp->out_fmt->color == IMG_FMT_YCBCR422P) 272 paddr->cr = (u32)(paddr->cb + (pix_size >> 1)); 273 else /* 420 */ 274 paddr->cr = (u32)(paddr->cb + (pix_size >> 2)); 275 276 if (vp->out_fmt->color == IMG_FMT_YCRCB420) 277 swap(paddr->cb, paddr->cr); 278 break; 279 default: 280 return -EINVAL; 281 } 282 283 pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n", 284 &paddr->y, &paddr->cb, &paddr->cr); 285 286 return 0; 287} 288 289irqreturn_t s3c_camif_irq_handler(int irq, void *priv) 290{ 291 struct camif_vp *vp = priv; 292 struct camif_dev *camif = vp->camif; 293 unsigned int ip_rev = camif->variant->ip_revision; 294 unsigned int status; 295 296 spin_lock(&camif->slock); 297 298 if (ip_rev == S3C6410_CAMIF_IP_REV) 299 camif_hw_clear_pending_irq(vp); 300 301 status = camif_hw_get_status(vp); 302 303 if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) { 304 camif_hw_clear_fifo_overflow(vp); 305 goto unlock; 306 } 307 308 if (vp->state & ST_VP_ABORTING) { 309 if (vp->state & ST_VP_OFF) { 310 /* Last IRQ */ 311 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING | 312 ST_VP_LASTIRQ); 313 wake_up(&vp->irq_queue); 314 goto unlock; 315 } else if (vp->state & ST_VP_LASTIRQ) { 316 camif_hw_disable_capture(vp); 317 camif_hw_enable_scaler(vp, false); 318 camif_hw_set_lastirq(vp, false); 319 vp->state |= ST_VP_OFF; 320 } else { 321 /* Disable capture, enable last IRQ */ 322 camif_hw_set_lastirq(vp, true); 323 vp->state |= ST_VP_LASTIRQ; 324 } 325 } 326 327 if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) && 328 !list_empty(&vp->active_buf_q)) { 329 unsigned int index; 330 struct camif_buffer *vbuf; 331 struct timeval *tv; 332 struct timespec ts; 333 /* 334 * Get previous DMA write buffer index: 335 * 0 => DMA buffer 0, 2; 336 * 1 => DMA buffer 1, 3. 337 */ 338 index = (CISTATUS_FRAMECNT(status) + 2) & 1; 339 340 ktime_get_ts(&ts); 341 vbuf = camif_active_queue_peek(vp, index); 342 343 if (!WARN_ON(vbuf == NULL)) { 344 /* Dequeue a filled buffer */ 345 tv = &vbuf->vb.v4l2_buf.timestamp; 346 tv->tv_sec = ts.tv_sec; 347 tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC; 348 vbuf->vb.v4l2_buf.sequence = vp->frame_sequence++; 349 vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE); 350 351 /* Set up an empty buffer at the DMA engine */ 352 vbuf = camif_pending_queue_pop(vp); 353 vbuf->index = index; 354 camif_hw_set_output_addr(vp, &vbuf->paddr, index); 355 camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2); 356 357 /* Scheduled in H/W, add to the queue */ 358 camif_active_queue_add(vp, vbuf); 359 } 360 } else if (!(vp->state & ST_VP_ABORTING) && 361 (vp->state & ST_VP_PENDING)) { 362 vp->state |= ST_VP_RUNNING; 363 } 364 365 if (vp->state & ST_VP_CONFIG) { 366 camif_prepare_dma_offset(vp); 367 camif_hw_set_camera_crop(camif); 368 camif_hw_set_scaler(vp); 369 camif_hw_set_flip(vp); 370 camif_hw_set_test_pattern(camif, camif->test_pattern); 371 if (camif->variant->has_img_effect) 372 camif_hw_set_effect(camif, camif->colorfx, 373 camif->colorfx_cb, camif->colorfx_cr); 374 vp->state &= ~ST_VP_CONFIG; 375 } 376unlock: 377 spin_unlock(&camif->slock); 378 return IRQ_HANDLED; 379} 380 381static int start_streaming(struct vb2_queue *vq, unsigned int count) 382{ 383 struct camif_vp *vp = vb2_get_drv_priv(vq); 384 struct camif_dev *camif = vp->camif; 385 unsigned long flags; 386 int ret; 387 388 /* 389 * We assume the codec capture path is always activated 390 * first, before the preview path starts streaming. 391 * This is required to avoid internal FIFO overflow and 392 * a need for CAMIF software reset. 393 */ 394 spin_lock_irqsave(&camif->slock, flags); 395 396 if (camif->stream_count == 0) { 397 camif_hw_reset(camif); 398 ret = s3c_camif_hw_init(camif, vp); 399 } else { 400 ret = s3c_camif_hw_vp_init(camif, vp); 401 } 402 spin_unlock_irqrestore(&camif->slock, flags); 403 404 if (ret < 0) { 405 camif_reinitialize(vp); 406 return ret; 407 } 408 409 spin_lock_irqsave(&camif->slock, flags); 410 vp->frame_sequence = 0; 411 vp->state |= ST_VP_PENDING; 412 413 if (!list_empty(&vp->pending_buf_q) && 414 (!(vp->state & ST_VP_STREAMING) || 415 !(vp->state & ST_VP_SENSOR_STREAMING))) { 416 417 camif_hw_enable_scaler(vp, vp->scaler.enable); 418 camif_hw_enable_capture(vp); 419 vp->state |= ST_VP_STREAMING; 420 421 if (!(vp->state & ST_VP_SENSOR_STREAMING)) { 422 vp->state |= ST_VP_SENSOR_STREAMING; 423 spin_unlock_irqrestore(&camif->slock, flags); 424 ret = sensor_set_streaming(camif, 1); 425 if (ret) 426 v4l2_err(&vp->vdev, "Sensor s_stream failed\n"); 427 if (debug) 428 camif_hw_dump_regs(camif, __func__); 429 430 return ret; 431 } 432 } 433 434 spin_unlock_irqrestore(&camif->slock, flags); 435 return 0; 436} 437 438static void stop_streaming(struct vb2_queue *vq) 439{ 440 struct camif_vp *vp = vb2_get_drv_priv(vq); 441 camif_stop_capture(vp); 442} 443 444static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt, 445 unsigned int *num_buffers, unsigned int *num_planes, 446 unsigned int sizes[], void *allocators[]) 447{ 448 const struct v4l2_pix_format *pix = NULL; 449 struct camif_vp *vp = vb2_get_drv_priv(vq); 450 struct camif_dev *camif = vp->camif; 451 struct camif_frame *frame = &vp->out_frame; 452 const struct camif_fmt *fmt = vp->out_fmt; 453 unsigned int size; 454 455 if (pfmt) { 456 pix = &pfmt->fmt.pix; 457 fmt = s3c_camif_find_format(vp, &pix->pixelformat, -1); 458 size = (pix->width * pix->height * fmt->depth) / 8; 459 } else { 460 size = (frame->f_width * frame->f_height * fmt->depth) / 8; 461 } 462 463 if (fmt == NULL) 464 return -EINVAL; 465 *num_planes = 1; 466 467 if (pix) 468 sizes[0] = max(size, pix->sizeimage); 469 else 470 sizes[0] = size; 471 allocators[0] = camif->alloc_ctx; 472 473 pr_debug("size: %u\n", sizes[0]); 474 return 0; 475} 476 477static int buffer_prepare(struct vb2_buffer *vb) 478{ 479 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue); 480 481 if (vp->out_fmt == NULL) 482 return -EINVAL; 483 484 if (vb2_plane_size(vb, 0) < vp->payload) { 485 v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n", 486 vb2_plane_size(vb, 0), vp->payload); 487 return -EINVAL; 488 } 489 vb2_set_plane_payload(vb, 0, vp->payload); 490 491 return 0; 492} 493 494static void buffer_queue(struct vb2_buffer *vb) 495{ 496 struct camif_buffer *buf = container_of(vb, struct camif_buffer, vb); 497 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue); 498 struct camif_dev *camif = vp->camif; 499 unsigned long flags; 500 501 spin_lock_irqsave(&camif->slock, flags); 502 WARN_ON(camif_prepare_addr(vp, &buf->vb, &buf->paddr)); 503 504 if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) { 505 /* Schedule an empty buffer in H/W */ 506 buf->index = vp->buf_index; 507 508 camif_hw_set_output_addr(vp, &buf->paddr, buf->index); 509 camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2); 510 511 camif_active_queue_add(vp, buf); 512 vp->buf_index = !vp->buf_index; 513 } else { 514 camif_pending_queue_add(vp, buf); 515 } 516 517 if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q) 518 && !(vp->state & ST_VP_STREAMING)) { 519 520 vp->state |= ST_VP_STREAMING; 521 camif_hw_enable_scaler(vp, vp->scaler.enable); 522 camif_hw_enable_capture(vp); 523 spin_unlock_irqrestore(&camif->slock, flags); 524 525 if (!(vp->state & ST_VP_SENSOR_STREAMING)) { 526 if (sensor_set_streaming(camif, 1) == 0) 527 vp->state |= ST_VP_SENSOR_STREAMING; 528 else 529 v4l2_err(&vp->vdev, "Sensor s_stream failed\n"); 530 531 if (debug) 532 camif_hw_dump_regs(camif, __func__); 533 } 534 return; 535 } 536 spin_unlock_irqrestore(&camif->slock, flags); 537} 538 539static const struct vb2_ops s3c_camif_qops = { 540 .queue_setup = queue_setup, 541 .buf_prepare = buffer_prepare, 542 .buf_queue = buffer_queue, 543 .wait_prepare = vb2_ops_wait_prepare, 544 .wait_finish = vb2_ops_wait_finish, 545 .start_streaming = start_streaming, 546 .stop_streaming = stop_streaming, 547}; 548 549static int s3c_camif_open(struct file *file) 550{ 551 struct camif_vp *vp = video_drvdata(file); 552 struct camif_dev *camif = vp->camif; 553 int ret; 554 555 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 556 vp->state, vp->owner, task_pid_nr(current)); 557 558 if (mutex_lock_interruptible(&camif->lock)) 559 return -ERESTARTSYS; 560 561 ret = v4l2_fh_open(file); 562 if (ret < 0) 563 goto unlock; 564 565 ret = pm_runtime_get_sync(camif->dev); 566 if (ret < 0) 567 goto err_pm; 568 569 ret = sensor_set_power(camif, 1); 570 if (!ret) 571 goto unlock; 572 573 pm_runtime_put(camif->dev); 574err_pm: 575 v4l2_fh_release(file); 576unlock: 577 mutex_unlock(&camif->lock); 578 return ret; 579} 580 581static int s3c_camif_close(struct file *file) 582{ 583 struct camif_vp *vp = video_drvdata(file); 584 struct camif_dev *camif = vp->camif; 585 int ret; 586 587 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 588 vp->state, vp->owner, task_pid_nr(current)); 589 590 mutex_lock(&camif->lock); 591 592 if (vp->owner == file->private_data) { 593 camif_stop_capture(vp); 594 vb2_queue_release(&vp->vb_queue); 595 vp->owner = NULL; 596 } 597 598 sensor_set_power(camif, 0); 599 600 pm_runtime_put(camif->dev); 601 ret = v4l2_fh_release(file); 602 603 mutex_unlock(&camif->lock); 604 return ret; 605} 606 607static unsigned int s3c_camif_poll(struct file *file, 608 struct poll_table_struct *wait) 609{ 610 struct camif_vp *vp = video_drvdata(file); 611 struct camif_dev *camif = vp->camif; 612 int ret; 613 614 mutex_lock(&camif->lock); 615 if (vp->owner && vp->owner != file->private_data) 616 ret = -EBUSY; 617 else 618 ret = vb2_poll(&vp->vb_queue, file, wait); 619 620 mutex_unlock(&camif->lock); 621 return ret; 622} 623 624static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma) 625{ 626 struct camif_vp *vp = video_drvdata(file); 627 int ret; 628 629 if (vp->owner && vp->owner != file->private_data) 630 ret = -EBUSY; 631 else 632 ret = vb2_mmap(&vp->vb_queue, vma); 633 634 return ret; 635} 636 637static const struct v4l2_file_operations s3c_camif_fops = { 638 .owner = THIS_MODULE, 639 .open = s3c_camif_open, 640 .release = s3c_camif_close, 641 .poll = s3c_camif_poll, 642 .unlocked_ioctl = video_ioctl2, 643 .mmap = s3c_camif_mmap, 644}; 645 646/* 647 * Video node IOCTLs 648 */ 649 650static int s3c_camif_vidioc_querycap(struct file *file, void *priv, 651 struct v4l2_capability *cap) 652{ 653 struct camif_vp *vp = video_drvdata(file); 654 655 strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver)); 656 strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card)); 657 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d", 658 dev_name(vp->camif->dev), vp->id); 659 660 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; 661 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 662 663 return 0; 664} 665 666static int s3c_camif_vidioc_enum_input(struct file *file, void *priv, 667 struct v4l2_input *input) 668{ 669 struct camif_vp *vp = video_drvdata(file); 670 struct v4l2_subdev *sensor = vp->camif->sensor.sd; 671 672 if (input->index || sensor == NULL) 673 return -EINVAL; 674 675 input->type = V4L2_INPUT_TYPE_CAMERA; 676 strlcpy(input->name, sensor->name, sizeof(input->name)); 677 return 0; 678} 679 680static int s3c_camif_vidioc_s_input(struct file *file, void *priv, 681 unsigned int i) 682{ 683 return i == 0 ? 0 : -EINVAL; 684} 685 686static int s3c_camif_vidioc_g_input(struct file *file, void *priv, 687 unsigned int *i) 688{ 689 *i = 0; 690 return 0; 691} 692 693static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv, 694 struct v4l2_fmtdesc *f) 695{ 696 struct camif_vp *vp = video_drvdata(file); 697 const struct camif_fmt *fmt; 698 699 fmt = s3c_camif_find_format(vp, NULL, f->index); 700 if (!fmt) 701 return -EINVAL; 702 703 strlcpy(f->description, fmt->name, sizeof(f->description)); 704 f->pixelformat = fmt->fourcc; 705 706 pr_debug("fmt(%d): %s\n", f->index, f->description); 707 return 0; 708} 709 710static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv, 711 struct v4l2_format *f) 712{ 713 struct camif_vp *vp = video_drvdata(file); 714 struct v4l2_pix_format *pix = &f->fmt.pix; 715 struct camif_frame *frame = &vp->out_frame; 716 const struct camif_fmt *fmt = vp->out_fmt; 717 718 pix->bytesperline = frame->f_width * fmt->ybpp; 719 pix->sizeimage = vp->payload; 720 721 pix->pixelformat = fmt->fourcc; 722 pix->width = frame->f_width; 723 pix->height = frame->f_height; 724 pix->field = V4L2_FIELD_NONE; 725 pix->colorspace = V4L2_COLORSPACE_JPEG; 726 727 return 0; 728} 729 730static int __camif_video_try_format(struct camif_vp *vp, 731 struct v4l2_pix_format *pix, 732 const struct camif_fmt **ffmt) 733{ 734 struct camif_dev *camif = vp->camif; 735 struct v4l2_rect *crop = &camif->camif_crop; 736 unsigned int wmin, hmin, sc_hrmax, sc_vrmax; 737 const struct vp_pix_limits *pix_lim; 738 const struct camif_fmt *fmt; 739 740 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0); 741 742 if (WARN_ON(fmt == NULL)) 743 return -EINVAL; 744 745 if (ffmt) 746 *ffmt = fmt; 747 748 pix_lim = &camif->variant->vp_pix_limits[vp->id]; 749 750 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n", 751 pix->width, pix->height, crop->width, crop->height, 752 pix->bytesperline); 753 /* 754 * Calculate minimum width and height according to the configured 755 * camera input interface crop rectangle and the resizer's capabilities. 756 */ 757 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3)); 758 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1)); 759 760 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax); 761 wmin = round_up(wmin, pix_lim->out_width_align); 762 hmin = max_t(u32, 8, crop->height / sc_vrmax); 763 hmin = round_up(hmin, 8); 764 765 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width, 766 ffs(pix_lim->out_width_align) - 1, 767 &pix->height, hmin, pix_lim->max_height, 0, 0); 768 769 pix->bytesperline = pix->width * fmt->ybpp; 770 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8; 771 pix->pixelformat = fmt->fourcc; 772 pix->colorspace = V4L2_COLORSPACE_JPEG; 773 pix->field = V4L2_FIELD_NONE; 774 775 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n", 776 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax); 777 778 return 0; 779} 780 781static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv, 782 struct v4l2_format *f) 783{ 784 struct camif_vp *vp = video_drvdata(file); 785 return __camif_video_try_format(vp, &f->fmt.pix, NULL); 786} 787 788static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv, 789 struct v4l2_format *f) 790{ 791 struct v4l2_pix_format *pix = &f->fmt.pix; 792 struct camif_vp *vp = video_drvdata(file); 793 struct camif_frame *out_frame = &vp->out_frame; 794 const struct camif_fmt *fmt = NULL; 795 int ret; 796 797 pr_debug("[vp%d]\n", vp->id); 798 799 if (vb2_is_busy(&vp->vb_queue)) 800 return -EBUSY; 801 802 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt); 803 if (ret < 0) 804 return ret; 805 806 vp->out_fmt = fmt; 807 vp->payload = pix->sizeimage; 808 out_frame->f_width = pix->width; 809 out_frame->f_height = pix->height; 810 811 /* Reset composition rectangle */ 812 out_frame->rect.width = pix->width; 813 out_frame->rect.height = pix->height; 814 out_frame->rect.left = 0; 815 out_frame->rect.top = 0; 816 817 if (vp->owner == NULL) 818 vp->owner = priv; 819 820 pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n", 821 out_frame->f_width, out_frame->f_height, vp->payload, fmt->name, 822 pix->width * pix->height * fmt->depth, fmt->depth, 823 pix->sizeimage, pix->bytesperline); 824 825 return 0; 826} 827 828/* Only check pixel formats at the sensor and the camif subdev pads */ 829static int camif_pipeline_validate(struct camif_dev *camif) 830{ 831 struct v4l2_subdev_format src_fmt; 832 struct media_pad *pad; 833 int ret; 834 835 /* Retrieve format at the sensor subdev source pad */ 836 pad = media_entity_remote_pad(&camif->pads[0]); 837 if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) 838 return -EPIPE; 839 840 src_fmt.pad = pad->index; 841 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 842 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt); 843 if (ret < 0 && ret != -ENOIOCTLCMD) 844 return -EPIPE; 845 846 if (src_fmt.format.width != camif->mbus_fmt.width || 847 src_fmt.format.height != camif->mbus_fmt.height || 848 src_fmt.format.code != camif->mbus_fmt.code) 849 return -EPIPE; 850 851 return 0; 852} 853 854static int s3c_camif_streamon(struct file *file, void *priv, 855 enum v4l2_buf_type type) 856{ 857 struct camif_vp *vp = video_drvdata(file); 858 struct camif_dev *camif = vp->camif; 859 struct media_entity *sensor = &camif->sensor.sd->entity; 860 int ret; 861 862 pr_debug("[vp%d]\n", vp->id); 863 864 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 865 return -EINVAL; 866 867 if (vp->owner && vp->owner != priv) 868 return -EBUSY; 869 870 if (s3c_vp_active(vp)) 871 return 0; 872 873 ret = media_entity_pipeline_start(sensor, camif->m_pipeline); 874 if (ret < 0) 875 return ret; 876 877 ret = camif_pipeline_validate(camif); 878 if (ret < 0) { 879 media_entity_pipeline_stop(sensor); 880 return ret; 881 } 882 883 return vb2_streamon(&vp->vb_queue, type); 884} 885 886static int s3c_camif_streamoff(struct file *file, void *priv, 887 enum v4l2_buf_type type) 888{ 889 struct camif_vp *vp = video_drvdata(file); 890 struct camif_dev *camif = vp->camif; 891 int ret; 892 893 pr_debug("[vp%d]\n", vp->id); 894 895 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 896 return -EINVAL; 897 898 if (vp->owner && vp->owner != priv) 899 return -EBUSY; 900 901 ret = vb2_streamoff(&vp->vb_queue, type); 902 if (ret == 0) 903 media_entity_pipeline_stop(&camif->sensor.sd->entity); 904 return ret; 905} 906 907static int s3c_camif_reqbufs(struct file *file, void *priv, 908 struct v4l2_requestbuffers *rb) 909{ 910 struct camif_vp *vp = video_drvdata(file); 911 int ret; 912 913 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n", 914 vp->id, rb->count, vp->owner, priv); 915 916 if (vp->owner && vp->owner != priv) 917 return -EBUSY; 918 919 if (rb->count) 920 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count); 921 else 922 vp->owner = NULL; 923 924 ret = vb2_reqbufs(&vp->vb_queue, rb); 925 if (ret < 0) 926 return ret; 927 928 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) { 929 rb->count = 0; 930 vb2_reqbufs(&vp->vb_queue, rb); 931 ret = -ENOMEM; 932 } 933 934 vp->reqbufs_count = rb->count; 935 if (vp->owner == NULL && rb->count > 0) 936 vp->owner = priv; 937 938 return ret; 939} 940 941static int s3c_camif_querybuf(struct file *file, void *priv, 942 struct v4l2_buffer *buf) 943{ 944 struct camif_vp *vp = video_drvdata(file); 945 return vb2_querybuf(&vp->vb_queue, buf); 946} 947 948static int s3c_camif_qbuf(struct file *file, void *priv, 949 struct v4l2_buffer *buf) 950{ 951 struct camif_vp *vp = video_drvdata(file); 952 953 pr_debug("[vp%d]\n", vp->id); 954 955 if (vp->owner && vp->owner != priv) 956 return -EBUSY; 957 958 return vb2_qbuf(&vp->vb_queue, buf); 959} 960 961static int s3c_camif_dqbuf(struct file *file, void *priv, 962 struct v4l2_buffer *buf) 963{ 964 struct camif_vp *vp = video_drvdata(file); 965 966 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence); 967 968 if (vp->owner && vp->owner != priv) 969 return -EBUSY; 970 971 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK); 972} 973 974static int s3c_camif_create_bufs(struct file *file, void *priv, 975 struct v4l2_create_buffers *create) 976{ 977 struct camif_vp *vp = video_drvdata(file); 978 int ret; 979 980 if (vp->owner && vp->owner != priv) 981 return -EBUSY; 982 983 create->count = max_t(u32, 1, create->count); 984 ret = vb2_create_bufs(&vp->vb_queue, create); 985 986 if (!ret && vp->owner == NULL) 987 vp->owner = priv; 988 989 return ret; 990} 991 992static int s3c_camif_prepare_buf(struct file *file, void *priv, 993 struct v4l2_buffer *b) 994{ 995 struct camif_vp *vp = video_drvdata(file); 996 return vb2_prepare_buf(&vp->vb_queue, b); 997} 998 999static int s3c_camif_g_selection(struct file *file, void *priv, 1000 struct v4l2_selection *sel) 1001{ 1002 struct camif_vp *vp = video_drvdata(file); 1003 1004 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1005 return -EINVAL; 1006 1007 switch (sel->target) { 1008 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1009 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 1010 sel->r.left = 0; 1011 sel->r.top = 0; 1012 sel->r.width = vp->out_frame.f_width; 1013 sel->r.height = vp->out_frame.f_height; 1014 return 0; 1015 1016 case V4L2_SEL_TGT_COMPOSE: 1017 sel->r = vp->out_frame.rect; 1018 return 0; 1019 } 1020 1021 return -EINVAL; 1022} 1023 1024static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp, 1025 struct v4l2_rect *r) 1026{ 1027 /* s3c244x doesn't support composition */ 1028 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) { 1029 *r = vp->out_frame.rect; 1030 return; 1031 } 1032 1033 /* TODO: s3c64xx */ 1034} 1035 1036static int s3c_camif_s_selection(struct file *file, void *priv, 1037 struct v4l2_selection *sel) 1038{ 1039 struct camif_vp *vp = video_drvdata(file); 1040 struct camif_dev *camif = vp->camif; 1041 struct v4l2_rect rect = sel->r; 1042 unsigned long flags; 1043 1044 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || 1045 sel->target != V4L2_SEL_TGT_COMPOSE) 1046 return -EINVAL; 1047 1048 __camif_try_compose(camif, vp, &rect); 1049 1050 sel->r = rect; 1051 spin_lock_irqsave(&camif->slock, flags); 1052 vp->out_frame.rect = rect; 1053 vp->state |= ST_VP_CONFIG; 1054 spin_unlock_irqrestore(&camif->slock, flags); 1055 1056 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n", 1057 sel->type, sel->target, sel->flags, 1058 sel->r.left, sel->r.top, sel->r.width, sel->r.height); 1059 1060 return 0; 1061} 1062 1063static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = { 1064 .vidioc_querycap = s3c_camif_vidioc_querycap, 1065 .vidioc_enum_input = s3c_camif_vidioc_enum_input, 1066 .vidioc_g_input = s3c_camif_vidioc_g_input, 1067 .vidioc_s_input = s3c_camif_vidioc_s_input, 1068 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt, 1069 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt, 1070 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt, 1071 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt, 1072 .vidioc_g_selection = s3c_camif_g_selection, 1073 .vidioc_s_selection = s3c_camif_s_selection, 1074 .vidioc_reqbufs = s3c_camif_reqbufs, 1075 .vidioc_querybuf = s3c_camif_querybuf, 1076 .vidioc_prepare_buf = s3c_camif_prepare_buf, 1077 .vidioc_create_bufs = s3c_camif_create_bufs, 1078 .vidioc_qbuf = s3c_camif_qbuf, 1079 .vidioc_dqbuf = s3c_camif_dqbuf, 1080 .vidioc_streamon = s3c_camif_streamon, 1081 .vidioc_streamoff = s3c_camif_streamoff, 1082 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1083 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1084 .vidioc_log_status = v4l2_ctrl_log_status, 1085}; 1086 1087/* 1088 * Video node controls 1089 */ 1090static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl) 1091{ 1092 struct camif_vp *vp = ctrl->priv; 1093 struct camif_dev *camif = vp->camif; 1094 unsigned long flags; 1095 1096 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id, 1097 ctrl->name, ctrl->val); 1098 1099 spin_lock_irqsave(&camif->slock, flags); 1100 1101 switch (ctrl->id) { 1102 case V4L2_CID_HFLIP: 1103 vp->hflip = ctrl->val; 1104 break; 1105 1106 case V4L2_CID_VFLIP: 1107 vp->vflip = ctrl->val; 1108 break; 1109 } 1110 1111 vp->state |= ST_VP_CONFIG; 1112 spin_unlock_irqrestore(&camif->slock, flags); 1113 return 0; 1114} 1115 1116/* Codec and preview video node control ops */ 1117static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = { 1118 .s_ctrl = s3c_camif_video_s_ctrl, 1119}; 1120 1121int s3c_camif_register_video_node(struct camif_dev *camif, int idx) 1122{ 1123 struct camif_vp *vp = &camif->vp[idx]; 1124 struct vb2_queue *q = &vp->vb_queue; 1125 struct video_device *vfd = &vp->vdev; 1126 struct v4l2_ctrl *ctrl; 1127 int ret; 1128 1129 memset(vfd, 0, sizeof(*vfd)); 1130 snprintf(vfd->name, sizeof(vfd->name), "camif-%s", 1131 vp->id == 0 ? "codec" : "preview"); 1132 1133 vfd->fops = &s3c_camif_fops; 1134 vfd->ioctl_ops = &s3c_camif_ioctl_ops; 1135 vfd->v4l2_dev = &camif->v4l2_dev; 1136 vfd->minor = -1; 1137 vfd->release = video_device_release_empty; 1138 vfd->lock = &camif->lock; 1139 vp->reqbufs_count = 0; 1140 1141 INIT_LIST_HEAD(&vp->pending_buf_q); 1142 INIT_LIST_HEAD(&vp->active_buf_q); 1143 1144 memset(q, 0, sizeof(*q)); 1145 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1146 q->io_modes = VB2_MMAP | VB2_USERPTR; 1147 q->ops = &s3c_camif_qops; 1148 q->mem_ops = &vb2_dma_contig_memops; 1149 q->buf_struct_size = sizeof(struct camif_buffer); 1150 q->drv_priv = vp; 1151 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1152 q->lock = &vp->camif->lock; 1153 1154 ret = vb2_queue_init(q); 1155 if (ret) 1156 goto err_vd_rel; 1157 1158 vp->pad.flags = MEDIA_PAD_FL_SINK; 1159 ret = media_entity_init(&vfd->entity, 1, &vp->pad, 0); 1160 if (ret) 1161 goto err_vd_rel; 1162 1163 video_set_drvdata(vfd, vp); 1164 1165 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1); 1166 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1167 V4L2_CID_HFLIP, 0, 1, 1, 0); 1168 if (ctrl) 1169 ctrl->priv = vp; 1170 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1171 V4L2_CID_VFLIP, 0, 1, 1, 0); 1172 if (ctrl) 1173 ctrl->priv = vp; 1174 1175 ret = vp->ctrl_handler.error; 1176 if (ret < 0) 1177 goto err_me_cleanup; 1178 1179 vfd->ctrl_handler = &vp->ctrl_handler; 1180 1181 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); 1182 if (ret) 1183 goto err_ctrlh_free; 1184 1185 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n", 1186 vfd->name, video_device_node_name(vfd)); 1187 return 0; 1188 1189err_ctrlh_free: 1190 v4l2_ctrl_handler_free(&vp->ctrl_handler); 1191err_me_cleanup: 1192 media_entity_cleanup(&vfd->entity); 1193err_vd_rel: 1194 video_device_release(vfd); 1195 return ret; 1196} 1197 1198void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx) 1199{ 1200 struct video_device *vfd = &camif->vp[idx].vdev; 1201 1202 if (video_is_registered(vfd)) { 1203 video_unregister_device(vfd); 1204 media_entity_cleanup(&vfd->entity); 1205 v4l2_ctrl_handler_free(vfd->ctrl_handler); 1206 } 1207} 1208 1209/* Media bus pixel formats supported at the camif input */ 1210static const u32 camif_mbus_formats[] = { 1211 MEDIA_BUS_FMT_YUYV8_2X8, 1212 MEDIA_BUS_FMT_YVYU8_2X8, 1213 MEDIA_BUS_FMT_UYVY8_2X8, 1214 MEDIA_BUS_FMT_VYUY8_2X8, 1215}; 1216 1217/* 1218 * Camera input interface subdev operations 1219 */ 1220 1221static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd, 1222 struct v4l2_subdev_pad_config *cfg, 1223 struct v4l2_subdev_mbus_code_enum *code) 1224{ 1225 if (code->index >= ARRAY_SIZE(camif_mbus_formats)) 1226 return -EINVAL; 1227 1228 code->code = camif_mbus_formats[code->index]; 1229 return 0; 1230} 1231 1232static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd, 1233 struct v4l2_subdev_pad_config *cfg, 1234 struct v4l2_subdev_format *fmt) 1235{ 1236 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1237 struct v4l2_mbus_framefmt *mf = &fmt->format; 1238 1239 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1240 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); 1241 fmt->format = *mf; 1242 return 0; 1243 } 1244 1245 mutex_lock(&camif->lock); 1246 1247 switch (fmt->pad) { 1248 case CAMIF_SD_PAD_SINK: 1249 /* full camera input pixel size */ 1250 *mf = camif->mbus_fmt; 1251 break; 1252 1253 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1254 /* crop rectangle at camera interface input */ 1255 mf->width = camif->camif_crop.width; 1256 mf->height = camif->camif_crop.height; 1257 mf->code = camif->mbus_fmt.code; 1258 break; 1259 } 1260 1261 mutex_unlock(&camif->lock); 1262 mf->field = V4L2_FIELD_NONE; 1263 mf->colorspace = V4L2_COLORSPACE_JPEG; 1264 return 0; 1265} 1266 1267static void __camif_subdev_try_format(struct camif_dev *camif, 1268 struct v4l2_mbus_framefmt *mf, int pad) 1269{ 1270 const struct s3c_camif_variant *variant = camif->variant; 1271 const struct vp_pix_limits *pix_lim; 1272 int i = ARRAY_SIZE(camif_mbus_formats); 1273 1274 /* FIXME: constraints against codec or preview path ? */ 1275 pix_lim = &variant->vp_pix_limits[VP_CODEC]; 1276 1277 while (i-- >= 0) 1278 if (camif_mbus_formats[i] == mf->code) 1279 break; 1280 1281 mf->code = camif_mbus_formats[i]; 1282 1283 if (pad == CAMIF_SD_PAD_SINK) { 1284 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH, 1285 ffs(pix_lim->out_width_align) - 1, 1286 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0, 1287 0); 1288 } else { 1289 struct v4l2_rect *crop = &camif->camif_crop; 1290 v4l_bound_align_image(&mf->width, 8, crop->width, 1291 ffs(pix_lim->out_width_align) - 1, 1292 &mf->height, 8, crop->height, 1293 0, 0); 1294 } 1295 1296 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height); 1297} 1298 1299static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd, 1300 struct v4l2_subdev_pad_config *cfg, 1301 struct v4l2_subdev_format *fmt) 1302{ 1303 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1304 struct v4l2_mbus_framefmt *mf = &fmt->format; 1305 struct v4l2_rect *crop = &camif->camif_crop; 1306 int i; 1307 1308 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n", 1309 fmt->pad, mf->code, mf->width, mf->height); 1310 1311 mf->field = V4L2_FIELD_NONE; 1312 mf->colorspace = V4L2_COLORSPACE_JPEG; 1313 mutex_lock(&camif->lock); 1314 1315 /* 1316 * No pixel format change at the camera input is allowed 1317 * while streaming. 1318 */ 1319 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) || 1320 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) { 1321 mutex_unlock(&camif->lock); 1322 return -EBUSY; 1323 } 1324 1325 __camif_subdev_try_format(camif, mf, fmt->pad); 1326 1327 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1328 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); 1329 *mf = fmt->format; 1330 mutex_unlock(&camif->lock); 1331 return 0; 1332 } 1333 1334 switch (fmt->pad) { 1335 case CAMIF_SD_PAD_SINK: 1336 camif->mbus_fmt = *mf; 1337 /* Reset sink crop rectangle. */ 1338 crop->width = mf->width; 1339 crop->height = mf->height; 1340 crop->left = 0; 1341 crop->top = 0; 1342 /* 1343 * Reset source format (the camif's crop rectangle) 1344 * and the video output resolution. 1345 */ 1346 for (i = 0; i < CAMIF_VP_NUM; i++) { 1347 struct camif_frame *frame = &camif->vp[i].out_frame; 1348 frame->rect = *crop; 1349 frame->f_width = mf->width; 1350 frame->f_height = mf->height; 1351 } 1352 break; 1353 1354 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1355 /* Pixel format can be only changed on the sink pad. */ 1356 mf->code = camif->mbus_fmt.code; 1357 mf->width = crop->width; 1358 mf->height = crop->height; 1359 break; 1360 } 1361 1362 mutex_unlock(&camif->lock); 1363 return 0; 1364} 1365 1366static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd, 1367 struct v4l2_subdev_pad_config *cfg, 1368 struct v4l2_subdev_selection *sel) 1369{ 1370 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1371 struct v4l2_rect *crop = &camif->camif_crop; 1372 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1373 1374 if ((sel->target != V4L2_SEL_TGT_CROP && 1375 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) || 1376 sel->pad != CAMIF_SD_PAD_SINK) 1377 return -EINVAL; 1378 1379 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1380 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad); 1381 return 0; 1382 } 1383 1384 mutex_lock(&camif->lock); 1385 1386 if (sel->target == V4L2_SEL_TGT_CROP) { 1387 sel->r = *crop; 1388 } else { /* crop bounds */ 1389 sel->r.width = mf->width; 1390 sel->r.height = mf->height; 1391 sel->r.left = 0; 1392 sel->r.top = 0; 1393 } 1394 1395 mutex_unlock(&camif->lock); 1396 1397 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n", 1398 __func__, crop->left, crop->top, crop->width, 1399 crop->height, mf->width, mf->height); 1400 1401 return 0; 1402} 1403 1404static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r) 1405{ 1406 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1407 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits; 1408 unsigned int left = 2 * r->left; 1409 unsigned int top = 2 * r->top; 1410 1411 /* 1412 * Following constraints must be met: 1413 * - r->width + 2 * r->left = mf->width; 1414 * - r->height + 2 * r->top = mf->height; 1415 * - crop rectangle size and position must be aligned 1416 * to 8 or 2 pixels, depending on SoC version. 1417 */ 1418 v4l_bound_align_image(&r->width, 0, mf->width, 1419 ffs(pix_lim->win_hor_offset_align) - 1, 1420 &r->height, 0, mf->height, 1, 0); 1421 1422 v4l_bound_align_image(&left, 0, mf->width - r->width, 1423 ffs(pix_lim->win_hor_offset_align), 1424 &top, 0, mf->height - r->height, 2, 0); 1425 1426 r->left = left / 2; 1427 r->top = top / 2; 1428 r->width = mf->width - left; 1429 r->height = mf->height - top; 1430 /* 1431 * Make sure we either downscale or upscale both the pixel 1432 * width and height. Just return current crop rectangle if 1433 * this scaler constraint is not met. 1434 */ 1435 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV && 1436 camif_is_streaming(camif)) { 1437 unsigned int i; 1438 1439 for (i = 0; i < CAMIF_VP_NUM; i++) { 1440 struct v4l2_rect *or = &camif->vp[i].out_frame.rect; 1441 if ((or->width > r->width) == (or->height > r->height)) 1442 continue; 1443 *r = camif->camif_crop; 1444 pr_debug("Width/height scaling direction limitation\n"); 1445 break; 1446 } 1447 } 1448 1449 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n", 1450 r->left, r->top, r->width, r->height, mf->width, mf->height); 1451} 1452 1453static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd, 1454 struct v4l2_subdev_pad_config *cfg, 1455 struct v4l2_subdev_selection *sel) 1456{ 1457 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1458 struct v4l2_rect *crop = &camif->camif_crop; 1459 struct camif_scaler scaler; 1460 1461 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK) 1462 return -EINVAL; 1463 1464 mutex_lock(&camif->lock); 1465 __camif_try_crop(camif, &sel->r); 1466 1467 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1468 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r; 1469 } else { 1470 unsigned long flags; 1471 unsigned int i; 1472 1473 spin_lock_irqsave(&camif->slock, flags); 1474 *crop = sel->r; 1475 1476 for (i = 0; i < CAMIF_VP_NUM; i++) { 1477 struct camif_vp *vp = &camif->vp[i]; 1478 scaler = vp->scaler; 1479 if (s3c_camif_get_scaler_config(vp, &scaler)) 1480 continue; 1481 vp->scaler = scaler; 1482 vp->state |= ST_VP_CONFIG; 1483 } 1484 1485 spin_unlock_irqrestore(&camif->slock, flags); 1486 } 1487 mutex_unlock(&camif->lock); 1488 1489 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n", 1490 __func__, crop->left, crop->top, crop->width, crop->height, 1491 camif->mbus_fmt.width, camif->mbus_fmt.height); 1492 1493 return 0; 1494} 1495 1496static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = { 1497 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code, 1498 .get_selection = s3c_camif_subdev_get_selection, 1499 .set_selection = s3c_camif_subdev_set_selection, 1500 .get_fmt = s3c_camif_subdev_get_fmt, 1501 .set_fmt = s3c_camif_subdev_set_fmt, 1502}; 1503 1504static struct v4l2_subdev_ops s3c_camif_subdev_ops = { 1505 .pad = &s3c_camif_subdev_pad_ops, 1506}; 1507 1508static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl) 1509{ 1510 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev, 1511 ctrl_handler); 1512 unsigned long flags; 1513 1514 spin_lock_irqsave(&camif->slock, flags); 1515 1516 switch (ctrl->id) { 1517 case V4L2_CID_COLORFX: 1518 camif->colorfx = camif->ctrl_colorfx->val; 1519 /* Set Cb, Cr */ 1520 switch (ctrl->val) { 1521 case V4L2_COLORFX_SEPIA: 1522 camif->colorfx_cb = 115; 1523 camif->colorfx_cr = 145; 1524 break; 1525 case V4L2_COLORFX_SET_CBCR: 1526 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8; 1527 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff; 1528 break; 1529 default: 1530 /* for V4L2_COLORFX_BW and others */ 1531 camif->colorfx_cb = 128; 1532 camif->colorfx_cr = 128; 1533 } 1534 break; 1535 case V4L2_CID_TEST_PATTERN: 1536 camif->test_pattern = camif->ctrl_test_pattern->val; 1537 break; 1538 default: 1539 WARN_ON(1); 1540 } 1541 1542 camif->vp[VP_CODEC].state |= ST_VP_CONFIG; 1543 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG; 1544 spin_unlock_irqrestore(&camif->slock, flags); 1545 1546 return 0; 1547} 1548 1549static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = { 1550 .s_ctrl = s3c_camif_subdev_s_ctrl, 1551}; 1552 1553static const char * const s3c_camif_test_pattern_menu[] = { 1554 "Disabled", 1555 "Color bars", 1556 "Horizontal increment", 1557 "Vertical increment", 1558}; 1559 1560int s3c_camif_create_subdev(struct camif_dev *camif) 1561{ 1562 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler; 1563 struct v4l2_subdev *sd = &camif->subdev; 1564 int ret; 1565 1566 v4l2_subdev_init(sd, &s3c_camif_subdev_ops); 1567 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1568 strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name)); 1569 1570 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 1571 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE; 1572 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE; 1573 1574 ret = media_entity_init(&sd->entity, CAMIF_SD_PADS_NUM, 1575 camif->pads, 0); 1576 if (ret) 1577 return ret; 1578 1579 v4l2_ctrl_handler_init(handler, 3); 1580 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler, 1581 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN, 1582 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0, 1583 s3c_camif_test_pattern_menu); 1584 1585 if (camif->variant->has_img_effect) { 1586 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler, 1587 &s3c_camif_subdev_ctrl_ops, 1588 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR, 1589 ~0x981f, V4L2_COLORFX_NONE); 1590 1591 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler, 1592 &s3c_camif_subdev_ctrl_ops, 1593 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0); 1594 } 1595 1596 if (handler->error) { 1597 v4l2_ctrl_handler_free(handler); 1598 media_entity_cleanup(&sd->entity); 1599 return handler->error; 1600 } 1601 1602 if (camif->variant->has_img_effect) 1603 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx, 1604 V4L2_COLORFX_SET_CBCR, false); 1605 1606 sd->ctrl_handler = handler; 1607 v4l2_set_subdevdata(sd, camif); 1608 1609 return 0; 1610} 1611 1612void s3c_camif_unregister_subdev(struct camif_dev *camif) 1613{ 1614 struct v4l2_subdev *sd = &camif->subdev; 1615 1616 /* Return if not registered */ 1617 if (v4l2_get_subdevdata(sd) == NULL) 1618 return; 1619 1620 v4l2_device_unregister_subdev(sd); 1621 media_entity_cleanup(&sd->entity); 1622 v4l2_ctrl_handler_free(&camif->ctrl_handler); 1623 v4l2_set_subdevdata(sd, NULL); 1624} 1625 1626int s3c_camif_set_defaults(struct camif_dev *camif) 1627{ 1628 unsigned int ip_rev = camif->variant->ip_revision; 1629 int i; 1630 1631 for (i = 0; i < CAMIF_VP_NUM; i++) { 1632 struct camif_vp *vp = &camif->vp[i]; 1633 struct camif_frame *f = &vp->out_frame; 1634 1635 vp->camif = camif; 1636 vp->id = i; 1637 vp->offset = camif->variant->vp_offset; 1638 1639 if (ip_rev == S3C244X_CAMIF_IP_REV) 1640 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW : 1641 FMT_FL_S3C24XX_CODEC; 1642 else 1643 vp->fmt_flags = FMT_FL_S3C64XX; 1644 1645 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0); 1646 BUG_ON(vp->out_fmt == NULL); 1647 1648 memset(f, 0, sizeof(*f)); 1649 f->f_width = CAMIF_DEF_WIDTH; 1650 f->f_height = CAMIF_DEF_HEIGHT; 1651 f->rect.width = CAMIF_DEF_WIDTH; 1652 f->rect.height = CAMIF_DEF_HEIGHT; 1653 1654 /* Scaler is always enabled */ 1655 vp->scaler.enable = 1; 1656 1657 vp->payload = (f->f_width * f->f_height * 1658 vp->out_fmt->depth) / 8; 1659 } 1660 1661 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt)); 1662 camif->mbus_fmt.width = CAMIF_DEF_WIDTH; 1663 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT; 1664 camif->mbus_fmt.code = camif_mbus_formats[0]; 1665 1666 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop)); 1667 camif->camif_crop.width = CAMIF_DEF_WIDTH; 1668 camif->camif_crop.height = CAMIF_DEF_HEIGHT; 1669 1670 return 0; 1671} 1672