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 40static int debug; 41module_param(debug, int, 0644); 42 43/* Locking: called with vp->camif->slock spinlock held */ 44static 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 53static 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 */ 65static 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 */ 95static 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 110static 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 128static 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 */ 149static 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 182static 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 195static 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 207static 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 241static 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 288irqreturn_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 } 369unlock: 370 spin_unlock(&camif->slock); 371 return IRQ_HANDLED; 372} 373 374static 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 431static 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 437static 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 461static 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 478static 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 524static const struct vb2_ops s3c_camif_qops = { 525 .queue_setup = queue_setup, 526 .buf_prepare = buffer_prepare, 527 .buf_queue = buffer_queue, 528 .wait_prepare = vb2_ops_wait_prepare, 529 .wait_finish = vb2_ops_wait_finish, 530 .start_streaming = start_streaming, 531 .stop_streaming = stop_streaming, 532}; 533 534static int s3c_camif_open(struct file *file) 535{ 536 struct camif_vp *vp = video_drvdata(file); 537 struct camif_dev *camif = vp->camif; 538 int ret; 539 540 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 541 vp->state, vp->owner, task_pid_nr(current)); 542 543 if (mutex_lock_interruptible(&camif->lock)) 544 return -ERESTARTSYS; 545 546 ret = v4l2_fh_open(file); 547 if (ret < 0) 548 goto unlock; 549 550 ret = pm_runtime_resume_and_get(camif->dev); 551 if (ret < 0) 552 goto err_pm; 553 554 ret = sensor_set_power(camif, 1); 555 if (!ret) 556 goto unlock; 557 558 pm_runtime_put(camif->dev); 559err_pm: 560 v4l2_fh_release(file); 561unlock: 562 mutex_unlock(&camif->lock); 563 return ret; 564} 565 566static int s3c_camif_close(struct file *file) 567{ 568 struct camif_vp *vp = video_drvdata(file); 569 struct camif_dev *camif = vp->camif; 570 int ret; 571 572 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id, 573 vp->state, vp->owner, task_pid_nr(current)); 574 575 mutex_lock(&camif->lock); 576 577 if (vp->owner == file->private_data) { 578 camif_stop_capture(vp); 579 vb2_queue_release(&vp->vb_queue); 580 vp->owner = NULL; 581 } 582 583 sensor_set_power(camif, 0); 584 585 pm_runtime_put(camif->dev); 586 ret = v4l2_fh_release(file); 587 588 mutex_unlock(&camif->lock); 589 return ret; 590} 591 592static __poll_t s3c_camif_poll(struct file *file, 593 struct poll_table_struct *wait) 594{ 595 struct camif_vp *vp = video_drvdata(file); 596 struct camif_dev *camif = vp->camif; 597 __poll_t ret; 598 599 mutex_lock(&camif->lock); 600 if (vp->owner && vp->owner != file->private_data) 601 ret = EPOLLERR; 602 else 603 ret = vb2_poll(&vp->vb_queue, file, wait); 604 605 mutex_unlock(&camif->lock); 606 return ret; 607} 608 609static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma) 610{ 611 struct camif_vp *vp = video_drvdata(file); 612 int ret; 613 614 if (vp->owner && vp->owner != file->private_data) 615 ret = -EBUSY; 616 else 617 ret = vb2_mmap(&vp->vb_queue, vma); 618 619 return ret; 620} 621 622static const struct v4l2_file_operations s3c_camif_fops = { 623 .owner = THIS_MODULE, 624 .open = s3c_camif_open, 625 .release = s3c_camif_close, 626 .poll = s3c_camif_poll, 627 .unlocked_ioctl = video_ioctl2, 628 .mmap = s3c_camif_mmap, 629}; 630 631/* 632 * Video node IOCTLs 633 */ 634 635static int s3c_camif_vidioc_querycap(struct file *file, void *priv, 636 struct v4l2_capability *cap) 637{ 638 struct camif_vp *vp = video_drvdata(file); 639 640 strscpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver)); 641 strscpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card)); 642 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d", 643 dev_name(vp->camif->dev), vp->id); 644 return 0; 645} 646 647static int s3c_camif_vidioc_enum_input(struct file *file, void *priv, 648 struct v4l2_input *input) 649{ 650 struct camif_vp *vp = video_drvdata(file); 651 struct v4l2_subdev *sensor = vp->camif->sensor.sd; 652 653 if (input->index || sensor == NULL) 654 return -EINVAL; 655 656 input->type = V4L2_INPUT_TYPE_CAMERA; 657 strscpy(input->name, sensor->name, sizeof(input->name)); 658 return 0; 659} 660 661static int s3c_camif_vidioc_s_input(struct file *file, void *priv, 662 unsigned int i) 663{ 664 return i == 0 ? 0 : -EINVAL; 665} 666 667static int s3c_camif_vidioc_g_input(struct file *file, void *priv, 668 unsigned int *i) 669{ 670 *i = 0; 671 return 0; 672} 673 674static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv, 675 struct v4l2_fmtdesc *f) 676{ 677 struct camif_vp *vp = video_drvdata(file); 678 const struct camif_fmt *fmt; 679 680 fmt = s3c_camif_find_format(vp, NULL, f->index); 681 if (!fmt) 682 return -EINVAL; 683 684 f->pixelformat = fmt->fourcc; 685 return 0; 686} 687 688static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv, 689 struct v4l2_format *f) 690{ 691 struct camif_vp *vp = video_drvdata(file); 692 struct v4l2_pix_format *pix = &f->fmt.pix; 693 struct camif_frame *frame = &vp->out_frame; 694 const struct camif_fmt *fmt = vp->out_fmt; 695 696 pix->bytesperline = frame->f_width * fmt->ybpp; 697 pix->sizeimage = vp->payload; 698 699 pix->pixelformat = fmt->fourcc; 700 pix->width = frame->f_width; 701 pix->height = frame->f_height; 702 pix->field = V4L2_FIELD_NONE; 703 pix->colorspace = V4L2_COLORSPACE_JPEG; 704 705 return 0; 706} 707 708static int __camif_video_try_format(struct camif_vp *vp, 709 struct v4l2_pix_format *pix, 710 const struct camif_fmt **ffmt) 711{ 712 struct camif_dev *camif = vp->camif; 713 struct v4l2_rect *crop = &camif->camif_crop; 714 unsigned int wmin, hmin, sc_hrmax, sc_vrmax; 715 const struct vp_pix_limits *pix_lim; 716 const struct camif_fmt *fmt; 717 718 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0); 719 720 if (WARN_ON(fmt == NULL)) 721 return -EINVAL; 722 723 if (ffmt) 724 *ffmt = fmt; 725 726 pix_lim = &camif->variant->vp_pix_limits[vp->id]; 727 728 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n", 729 pix->width, pix->height, crop->width, crop->height, 730 pix->bytesperline); 731 /* 732 * Calculate minimum width and height according to the configured 733 * camera input interface crop rectangle and the resizer's capabilities. 734 */ 735 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3)); 736 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1)); 737 738 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax); 739 wmin = round_up(wmin, pix_lim->out_width_align); 740 hmin = max_t(u32, 8, crop->height / sc_vrmax); 741 hmin = round_up(hmin, 8); 742 743 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width, 744 ffs(pix_lim->out_width_align) - 1, 745 &pix->height, hmin, pix_lim->max_height, 0, 0); 746 747 pix->bytesperline = pix->width * fmt->ybpp; 748 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8; 749 pix->pixelformat = fmt->fourcc; 750 pix->colorspace = V4L2_COLORSPACE_JPEG; 751 pix->field = V4L2_FIELD_NONE; 752 753 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n", 754 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax); 755 756 return 0; 757} 758 759static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv, 760 struct v4l2_format *f) 761{ 762 struct camif_vp *vp = video_drvdata(file); 763 return __camif_video_try_format(vp, &f->fmt.pix, NULL); 764} 765 766static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv, 767 struct v4l2_format *f) 768{ 769 struct v4l2_pix_format *pix = &f->fmt.pix; 770 struct camif_vp *vp = video_drvdata(file); 771 struct camif_frame *out_frame = &vp->out_frame; 772 const struct camif_fmt *fmt = NULL; 773 int ret; 774 775 pr_debug("[vp%d]\n", vp->id); 776 777 if (vb2_is_busy(&vp->vb_queue)) 778 return -EBUSY; 779 780 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt); 781 if (ret < 0) 782 return ret; 783 784 vp->out_fmt = fmt; 785 vp->payload = pix->sizeimage; 786 out_frame->f_width = pix->width; 787 out_frame->f_height = pix->height; 788 789 /* Reset composition rectangle */ 790 out_frame->rect.width = pix->width; 791 out_frame->rect.height = pix->height; 792 out_frame->rect.left = 0; 793 out_frame->rect.top = 0; 794 795 if (vp->owner == NULL) 796 vp->owner = priv; 797 798 pr_debug("%ux%u. payload: %u. fmt: 0x%08x. %d %d. sizeimage: %d. bpl: %d\n", 799 out_frame->f_width, out_frame->f_height, vp->payload, 800 fmt->fourcc, pix->width * pix->height * fmt->depth, 801 fmt->depth, pix->sizeimage, pix->bytesperline); 802 803 return 0; 804} 805 806/* Only check pixel formats at the sensor and the camif subdev pads */ 807static int camif_pipeline_validate(struct camif_dev *camif) 808{ 809 struct v4l2_subdev_format src_fmt = { 810 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 811 }; 812 struct media_pad *pad; 813 int ret; 814 815 /* Retrieve format at the sensor subdev source pad */ 816 pad = media_pad_remote_pad_first(&camif->pads[0]); 817 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 818 return -EPIPE; 819 820 src_fmt.pad = pad->index; 821 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt); 822 if (ret < 0 && ret != -ENOIOCTLCMD) 823 return -EPIPE; 824 825 if (src_fmt.format.width != camif->mbus_fmt.width || 826 src_fmt.format.height != camif->mbus_fmt.height || 827 src_fmt.format.code != camif->mbus_fmt.code) 828 return -EPIPE; 829 830 return 0; 831} 832 833static int s3c_camif_streamon(struct file *file, void *priv, 834 enum v4l2_buf_type type) 835{ 836 struct camif_vp *vp = video_drvdata(file); 837 struct camif_dev *camif = vp->camif; 838 struct media_entity *sensor = &camif->sensor.sd->entity; 839 int ret; 840 841 pr_debug("[vp%d]\n", vp->id); 842 843 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 844 return -EINVAL; 845 846 if (vp->owner && vp->owner != priv) 847 return -EBUSY; 848 849 if (s3c_vp_active(vp)) 850 return 0; 851 852 ret = media_pipeline_start(sensor->pads, camif->m_pipeline); 853 if (ret < 0) 854 return ret; 855 856 ret = camif_pipeline_validate(camif); 857 if (ret < 0) { 858 media_pipeline_stop(sensor->pads); 859 return ret; 860 } 861 862 return vb2_streamon(&vp->vb_queue, type); 863} 864 865static int s3c_camif_streamoff(struct file *file, void *priv, 866 enum v4l2_buf_type type) 867{ 868 struct camif_vp *vp = video_drvdata(file); 869 struct camif_dev *camif = vp->camif; 870 int ret; 871 872 pr_debug("[vp%d]\n", vp->id); 873 874 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 875 return -EINVAL; 876 877 if (vp->owner && vp->owner != priv) 878 return -EBUSY; 879 880 ret = vb2_streamoff(&vp->vb_queue, type); 881 if (ret == 0) 882 media_pipeline_stop(camif->sensor.sd->entity.pads); 883 return ret; 884} 885 886static int s3c_camif_reqbufs(struct file *file, void *priv, 887 struct v4l2_requestbuffers *rb) 888{ 889 struct camif_vp *vp = video_drvdata(file); 890 int ret; 891 892 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n", 893 vp->id, rb->count, vp->owner, priv); 894 895 if (vp->owner && vp->owner != priv) 896 return -EBUSY; 897 898 if (rb->count) 899 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count); 900 else 901 vp->owner = NULL; 902 903 ret = vb2_reqbufs(&vp->vb_queue, rb); 904 if (ret < 0) 905 return ret; 906 907 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) { 908 rb->count = 0; 909 vb2_reqbufs(&vp->vb_queue, rb); 910 ret = -ENOMEM; 911 } 912 913 vp->reqbufs_count = rb->count; 914 if (vp->owner == NULL && rb->count > 0) 915 vp->owner = priv; 916 917 return ret; 918} 919 920static int s3c_camif_querybuf(struct file *file, void *priv, 921 struct v4l2_buffer *buf) 922{ 923 struct camif_vp *vp = video_drvdata(file); 924 return vb2_querybuf(&vp->vb_queue, buf); 925} 926 927static int s3c_camif_qbuf(struct file *file, void *priv, 928 struct v4l2_buffer *buf) 929{ 930 struct camif_vp *vp = video_drvdata(file); 931 932 pr_debug("[vp%d]\n", vp->id); 933 934 if (vp->owner && vp->owner != priv) 935 return -EBUSY; 936 937 return vb2_qbuf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, buf); 938} 939 940static int s3c_camif_dqbuf(struct file *file, void *priv, 941 struct v4l2_buffer *buf) 942{ 943 struct camif_vp *vp = video_drvdata(file); 944 945 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence); 946 947 if (vp->owner && vp->owner != priv) 948 return -EBUSY; 949 950 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK); 951} 952 953static int s3c_camif_create_bufs(struct file *file, void *priv, 954 struct v4l2_create_buffers *create) 955{ 956 struct camif_vp *vp = video_drvdata(file); 957 int ret; 958 959 if (vp->owner && vp->owner != priv) 960 return -EBUSY; 961 962 create->count = max_t(u32, 1, create->count); 963 ret = vb2_create_bufs(&vp->vb_queue, create); 964 965 if (!ret && vp->owner == NULL) 966 vp->owner = priv; 967 968 return ret; 969} 970 971static int s3c_camif_prepare_buf(struct file *file, void *priv, 972 struct v4l2_buffer *b) 973{ 974 struct camif_vp *vp = video_drvdata(file); 975 return vb2_prepare_buf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, b); 976} 977 978static int s3c_camif_g_selection(struct file *file, void *priv, 979 struct v4l2_selection *sel) 980{ 981 struct camif_vp *vp = video_drvdata(file); 982 983 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 984 return -EINVAL; 985 986 switch (sel->target) { 987 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 988 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 989 sel->r.left = 0; 990 sel->r.top = 0; 991 sel->r.width = vp->out_frame.f_width; 992 sel->r.height = vp->out_frame.f_height; 993 return 0; 994 995 case V4L2_SEL_TGT_COMPOSE: 996 sel->r = vp->out_frame.rect; 997 return 0; 998 } 999 1000 return -EINVAL; 1001} 1002 1003static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp, 1004 struct v4l2_rect *r) 1005{ 1006 /* s3c244x doesn't support composition */ 1007 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) { 1008 *r = vp->out_frame.rect; 1009 return; 1010 } 1011 1012 /* TODO: s3c64xx */ 1013} 1014 1015static int s3c_camif_s_selection(struct file *file, void *priv, 1016 struct v4l2_selection *sel) 1017{ 1018 struct camif_vp *vp = video_drvdata(file); 1019 struct camif_dev *camif = vp->camif; 1020 struct v4l2_rect rect = sel->r; 1021 unsigned long flags; 1022 1023 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || 1024 sel->target != V4L2_SEL_TGT_COMPOSE) 1025 return -EINVAL; 1026 1027 __camif_try_compose(camif, vp, &rect); 1028 1029 sel->r = rect; 1030 spin_lock_irqsave(&camif->slock, flags); 1031 vp->out_frame.rect = rect; 1032 vp->state |= ST_VP_CONFIG; 1033 spin_unlock_irqrestore(&camif->slock, flags); 1034 1035 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n", 1036 sel->type, sel->target, sel->flags, 1037 sel->r.left, sel->r.top, sel->r.width, sel->r.height); 1038 1039 return 0; 1040} 1041 1042static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = { 1043 .vidioc_querycap = s3c_camif_vidioc_querycap, 1044 .vidioc_enum_input = s3c_camif_vidioc_enum_input, 1045 .vidioc_g_input = s3c_camif_vidioc_g_input, 1046 .vidioc_s_input = s3c_camif_vidioc_s_input, 1047 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt, 1048 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt, 1049 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt, 1050 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt, 1051 .vidioc_g_selection = s3c_camif_g_selection, 1052 .vidioc_s_selection = s3c_camif_s_selection, 1053 .vidioc_reqbufs = s3c_camif_reqbufs, 1054 .vidioc_querybuf = s3c_camif_querybuf, 1055 .vidioc_prepare_buf = s3c_camif_prepare_buf, 1056 .vidioc_create_bufs = s3c_camif_create_bufs, 1057 .vidioc_qbuf = s3c_camif_qbuf, 1058 .vidioc_dqbuf = s3c_camif_dqbuf, 1059 .vidioc_streamon = s3c_camif_streamon, 1060 .vidioc_streamoff = s3c_camif_streamoff, 1061 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1062 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1063 .vidioc_log_status = v4l2_ctrl_log_status, 1064}; 1065 1066/* 1067 * Video node controls 1068 */ 1069static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl) 1070{ 1071 struct camif_vp *vp = ctrl->priv; 1072 struct camif_dev *camif = vp->camif; 1073 unsigned long flags; 1074 1075 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id, 1076 ctrl->name, ctrl->val); 1077 1078 spin_lock_irqsave(&camif->slock, flags); 1079 1080 switch (ctrl->id) { 1081 case V4L2_CID_HFLIP: 1082 vp->hflip = ctrl->val; 1083 break; 1084 1085 case V4L2_CID_VFLIP: 1086 vp->vflip = ctrl->val; 1087 break; 1088 } 1089 1090 vp->state |= ST_VP_CONFIG; 1091 spin_unlock_irqrestore(&camif->slock, flags); 1092 return 0; 1093} 1094 1095/* Codec and preview video node control ops */ 1096static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = { 1097 .s_ctrl = s3c_camif_video_s_ctrl, 1098}; 1099 1100int s3c_camif_register_video_node(struct camif_dev *camif, int idx) 1101{ 1102 struct camif_vp *vp = &camif->vp[idx]; 1103 struct vb2_queue *q = &vp->vb_queue; 1104 struct video_device *vfd = &vp->vdev; 1105 struct v4l2_ctrl *ctrl; 1106 int ret; 1107 1108 memset(vfd, 0, sizeof(*vfd)); 1109 snprintf(vfd->name, sizeof(vfd->name), "camif-%s", 1110 vp->id == 0 ? "codec" : "preview"); 1111 1112 vfd->fops = &s3c_camif_fops; 1113 vfd->ioctl_ops = &s3c_camif_ioctl_ops; 1114 vfd->v4l2_dev = &camif->v4l2_dev; 1115 vfd->minor = -1; 1116 vfd->release = video_device_release_empty; 1117 vfd->lock = &camif->lock; 1118 vp->reqbufs_count = 0; 1119 1120 INIT_LIST_HEAD(&vp->pending_buf_q); 1121 INIT_LIST_HEAD(&vp->active_buf_q); 1122 1123 memset(q, 0, sizeof(*q)); 1124 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1125 q->io_modes = VB2_MMAP | VB2_USERPTR; 1126 q->ops = &s3c_camif_qops; 1127 q->mem_ops = &vb2_dma_contig_memops; 1128 q->buf_struct_size = sizeof(struct camif_buffer); 1129 q->drv_priv = vp; 1130 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1131 q->lock = &vp->camif->lock; 1132 q->dev = camif->v4l2_dev.dev; 1133 1134 ret = vb2_queue_init(q); 1135 if (ret) 1136 return ret; 1137 1138 vp->pad.flags = MEDIA_PAD_FL_SINK; 1139 ret = media_entity_pads_init(&vfd->entity, 1, &vp->pad); 1140 if (ret) 1141 return ret; 1142 1143 video_set_drvdata(vfd, vp); 1144 1145 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1); 1146 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1147 V4L2_CID_HFLIP, 0, 1, 1, 0); 1148 if (ctrl) 1149 ctrl->priv = vp; 1150 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops, 1151 V4L2_CID_VFLIP, 0, 1, 1, 0); 1152 if (ctrl) 1153 ctrl->priv = vp; 1154 1155 ret = vp->ctrl_handler.error; 1156 if (ret < 0) 1157 goto err_me_cleanup; 1158 1159 vfd->ctrl_handler = &vp->ctrl_handler; 1160 vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; 1161 1162 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1); 1163 if (ret) 1164 goto err_ctrlh_free; 1165 1166 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n", 1167 vfd->name, video_device_node_name(vfd)); 1168 return 0; 1169 1170err_ctrlh_free: 1171 v4l2_ctrl_handler_free(&vp->ctrl_handler); 1172err_me_cleanup: 1173 media_entity_cleanup(&vfd->entity); 1174 return ret; 1175} 1176 1177void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx) 1178{ 1179 struct video_device *vfd = &camif->vp[idx].vdev; 1180 1181 if (video_is_registered(vfd)) { 1182 video_unregister_device(vfd); 1183 media_entity_cleanup(&vfd->entity); 1184 v4l2_ctrl_handler_free(vfd->ctrl_handler); 1185 } 1186} 1187 1188/* Media bus pixel formats supported at the camif input */ 1189static const u32 camif_mbus_formats[] = { 1190 MEDIA_BUS_FMT_YUYV8_2X8, 1191 MEDIA_BUS_FMT_YVYU8_2X8, 1192 MEDIA_BUS_FMT_UYVY8_2X8, 1193 MEDIA_BUS_FMT_VYUY8_2X8, 1194}; 1195 1196/* 1197 * Camera input interface subdev operations 1198 */ 1199 1200static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd, 1201 struct v4l2_subdev_state *sd_state, 1202 struct v4l2_subdev_mbus_code_enum *code) 1203{ 1204 if (code->index >= ARRAY_SIZE(camif_mbus_formats)) 1205 return -EINVAL; 1206 1207 code->code = camif_mbus_formats[code->index]; 1208 return 0; 1209} 1210 1211static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd, 1212 struct v4l2_subdev_state *sd_state, 1213 struct v4l2_subdev_format *fmt) 1214{ 1215 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1216 struct v4l2_mbus_framefmt *mf = &fmt->format; 1217 1218 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1219 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 1220 fmt->format = *mf; 1221 return 0; 1222 } 1223 1224 mutex_lock(&camif->lock); 1225 1226 switch (fmt->pad) { 1227 case CAMIF_SD_PAD_SINK: 1228 /* full camera input pixel size */ 1229 *mf = camif->mbus_fmt; 1230 break; 1231 1232 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1233 /* crop rectangle at camera interface input */ 1234 mf->width = camif->camif_crop.width; 1235 mf->height = camif->camif_crop.height; 1236 mf->code = camif->mbus_fmt.code; 1237 break; 1238 } 1239 1240 mutex_unlock(&camif->lock); 1241 mf->field = V4L2_FIELD_NONE; 1242 mf->colorspace = V4L2_COLORSPACE_JPEG; 1243 return 0; 1244} 1245 1246static void __camif_subdev_try_format(struct camif_dev *camif, 1247 struct v4l2_mbus_framefmt *mf, int pad) 1248{ 1249 const struct s3c_camif_variant *variant = camif->variant; 1250 const struct vp_pix_limits *pix_lim; 1251 unsigned int i; 1252 1253 /* FIXME: constraints against codec or preview path ? */ 1254 pix_lim = &variant->vp_pix_limits[VP_CODEC]; 1255 1256 for (i = 0; i < ARRAY_SIZE(camif_mbus_formats); i++) 1257 if (camif_mbus_formats[i] == mf->code) 1258 break; 1259 1260 if (i == ARRAY_SIZE(camif_mbus_formats)) 1261 mf->code = camif_mbus_formats[0]; 1262 1263 if (pad == CAMIF_SD_PAD_SINK) { 1264 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH, 1265 ffs(pix_lim->out_width_align) - 1, 1266 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0, 1267 0); 1268 } else { 1269 struct v4l2_rect *crop = &camif->camif_crop; 1270 v4l_bound_align_image(&mf->width, 8, crop->width, 1271 ffs(pix_lim->out_width_align) - 1, 1272 &mf->height, 8, crop->height, 1273 0, 0); 1274 } 1275 1276 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height); 1277} 1278 1279static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd, 1280 struct v4l2_subdev_state *sd_state, 1281 struct v4l2_subdev_format *fmt) 1282{ 1283 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1284 struct v4l2_mbus_framefmt *mf = &fmt->format; 1285 struct v4l2_rect *crop = &camif->camif_crop; 1286 int i; 1287 1288 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n", 1289 fmt->pad, mf->code, mf->width, mf->height); 1290 1291 mf->field = V4L2_FIELD_NONE; 1292 mf->colorspace = V4L2_COLORSPACE_JPEG; 1293 mutex_lock(&camif->lock); 1294 1295 /* 1296 * No pixel format change at the camera input is allowed 1297 * while streaming. 1298 */ 1299 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) || 1300 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) { 1301 mutex_unlock(&camif->lock); 1302 return -EBUSY; 1303 } 1304 1305 __camif_subdev_try_format(camif, mf, fmt->pad); 1306 1307 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1308 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 1309 *mf = fmt->format; 1310 mutex_unlock(&camif->lock); 1311 return 0; 1312 } 1313 1314 switch (fmt->pad) { 1315 case CAMIF_SD_PAD_SINK: 1316 camif->mbus_fmt = *mf; 1317 /* Reset sink crop rectangle. */ 1318 crop->width = mf->width; 1319 crop->height = mf->height; 1320 crop->left = 0; 1321 crop->top = 0; 1322 /* 1323 * Reset source format (the camif's crop rectangle) 1324 * and the video output resolution. 1325 */ 1326 for (i = 0; i < CAMIF_VP_NUM; i++) { 1327 struct camif_frame *frame = &camif->vp[i].out_frame; 1328 frame->rect = *crop; 1329 frame->f_width = mf->width; 1330 frame->f_height = mf->height; 1331 } 1332 break; 1333 1334 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P: 1335 /* Pixel format can be only changed on the sink pad. */ 1336 mf->code = camif->mbus_fmt.code; 1337 mf->width = crop->width; 1338 mf->height = crop->height; 1339 break; 1340 } 1341 1342 mutex_unlock(&camif->lock); 1343 return 0; 1344} 1345 1346static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd, 1347 struct v4l2_subdev_state *sd_state, 1348 struct v4l2_subdev_selection *sel) 1349{ 1350 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1351 struct v4l2_rect *crop = &camif->camif_crop; 1352 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1353 1354 if ((sel->target != V4L2_SEL_TGT_CROP && 1355 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) || 1356 sel->pad != CAMIF_SD_PAD_SINK) 1357 return -EINVAL; 1358 1359 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1360 sel->r = *v4l2_subdev_state_get_crop(sd_state, sel->pad); 1361 return 0; 1362 } 1363 1364 mutex_lock(&camif->lock); 1365 1366 if (sel->target == V4L2_SEL_TGT_CROP) { 1367 sel->r = *crop; 1368 } else { /* crop bounds */ 1369 sel->r.width = mf->width; 1370 sel->r.height = mf->height; 1371 sel->r.left = 0; 1372 sel->r.top = 0; 1373 } 1374 1375 mutex_unlock(&camif->lock); 1376 1377 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n", 1378 __func__, crop->left, crop->top, crop->width, 1379 crop->height, mf->width, mf->height); 1380 1381 return 0; 1382} 1383 1384static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r) 1385{ 1386 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt; 1387 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits; 1388 unsigned int left = 2 * r->left; 1389 unsigned int top = 2 * r->top; 1390 1391 /* 1392 * Following constraints must be met: 1393 * - r->width + 2 * r->left = mf->width; 1394 * - r->height + 2 * r->top = mf->height; 1395 * - crop rectangle size and position must be aligned 1396 * to 8 or 2 pixels, depending on SoC version. 1397 */ 1398 v4l_bound_align_image(&r->width, 0, mf->width, 1399 ffs(pix_lim->win_hor_offset_align) - 1, 1400 &r->height, 0, mf->height, 1, 0); 1401 1402 v4l_bound_align_image(&left, 0, mf->width - r->width, 1403 ffs(pix_lim->win_hor_offset_align), 1404 &top, 0, mf->height - r->height, 2, 0); 1405 1406 r->left = left / 2; 1407 r->top = top / 2; 1408 r->width = mf->width - left; 1409 r->height = mf->height - top; 1410 /* 1411 * Make sure we either downscale or upscale both the pixel 1412 * width and height. Just return current crop rectangle if 1413 * this scaler constraint is not met. 1414 */ 1415 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV && 1416 camif_is_streaming(camif)) { 1417 unsigned int i; 1418 1419 for (i = 0; i < CAMIF_VP_NUM; i++) { 1420 struct v4l2_rect *or = &camif->vp[i].out_frame.rect; 1421 if ((or->width > r->width) == (or->height > r->height)) 1422 continue; 1423 *r = camif->camif_crop; 1424 pr_debug("Width/height scaling direction limitation\n"); 1425 break; 1426 } 1427 } 1428 1429 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n", 1430 r->left, r->top, r->width, r->height, mf->width, mf->height); 1431} 1432 1433static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd, 1434 struct v4l2_subdev_state *sd_state, 1435 struct v4l2_subdev_selection *sel) 1436{ 1437 struct camif_dev *camif = v4l2_get_subdevdata(sd); 1438 struct v4l2_rect *crop = &camif->camif_crop; 1439 struct camif_scaler scaler; 1440 1441 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK) 1442 return -EINVAL; 1443 1444 mutex_lock(&camif->lock); 1445 __camif_try_crop(camif, &sel->r); 1446 1447 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1448 *v4l2_subdev_state_get_crop(sd_state, sel->pad) = sel->r; 1449 } else { 1450 unsigned long flags; 1451 unsigned int i; 1452 1453 spin_lock_irqsave(&camif->slock, flags); 1454 *crop = sel->r; 1455 1456 for (i = 0; i < CAMIF_VP_NUM; i++) { 1457 struct camif_vp *vp = &camif->vp[i]; 1458 scaler = vp->scaler; 1459 if (s3c_camif_get_scaler_config(vp, &scaler)) 1460 continue; 1461 vp->scaler = scaler; 1462 vp->state |= ST_VP_CONFIG; 1463 } 1464 1465 spin_unlock_irqrestore(&camif->slock, flags); 1466 } 1467 mutex_unlock(&camif->lock); 1468 1469 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n", 1470 __func__, crop->left, crop->top, crop->width, crop->height, 1471 camif->mbus_fmt.width, camif->mbus_fmt.height); 1472 1473 return 0; 1474} 1475 1476static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = { 1477 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code, 1478 .get_selection = s3c_camif_subdev_get_selection, 1479 .set_selection = s3c_camif_subdev_set_selection, 1480 .get_fmt = s3c_camif_subdev_get_fmt, 1481 .set_fmt = s3c_camif_subdev_set_fmt, 1482}; 1483 1484static const struct v4l2_subdev_ops s3c_camif_subdev_ops = { 1485 .pad = &s3c_camif_subdev_pad_ops, 1486}; 1487 1488static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl) 1489{ 1490 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev, 1491 ctrl_handler); 1492 unsigned long flags; 1493 1494 spin_lock_irqsave(&camif->slock, flags); 1495 1496 switch (ctrl->id) { 1497 case V4L2_CID_COLORFX: 1498 camif->colorfx = camif->ctrl_colorfx->val; 1499 /* Set Cb, Cr */ 1500 switch (ctrl->val) { 1501 case V4L2_COLORFX_SEPIA: 1502 camif->colorfx_cb = 115; 1503 camif->colorfx_cr = 145; 1504 break; 1505 case V4L2_COLORFX_SET_CBCR: 1506 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8; 1507 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff; 1508 break; 1509 default: 1510 /* for V4L2_COLORFX_BW and others */ 1511 camif->colorfx_cb = 128; 1512 camif->colorfx_cr = 128; 1513 } 1514 break; 1515 case V4L2_CID_TEST_PATTERN: 1516 camif->test_pattern = camif->ctrl_test_pattern->val; 1517 break; 1518 default: 1519 WARN_ON(1); 1520 } 1521 1522 camif->vp[VP_CODEC].state |= ST_VP_CONFIG; 1523 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG; 1524 spin_unlock_irqrestore(&camif->slock, flags); 1525 1526 return 0; 1527} 1528 1529static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = { 1530 .s_ctrl = s3c_camif_subdev_s_ctrl, 1531}; 1532 1533static const char * const s3c_camif_test_pattern_menu[] = { 1534 "Disabled", 1535 "Color bars", 1536 "Horizontal increment", 1537 "Vertical increment", 1538}; 1539 1540int s3c_camif_create_subdev(struct camif_dev *camif) 1541{ 1542 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler; 1543 struct v4l2_subdev *sd = &camif->subdev; 1544 int ret; 1545 1546 v4l2_subdev_init(sd, &s3c_camif_subdev_ops); 1547 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1548 strscpy(sd->name, "S3C-CAMIF", sizeof(sd->name)); 1549 1550 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 1551 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE; 1552 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE; 1553 1554 ret = media_entity_pads_init(&sd->entity, CAMIF_SD_PADS_NUM, 1555 camif->pads); 1556 if (ret) 1557 return ret; 1558 1559 v4l2_ctrl_handler_init(handler, 3); 1560 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler, 1561 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN, 1562 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0, 1563 s3c_camif_test_pattern_menu); 1564 1565 if (camif->variant->has_img_effect) { 1566 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler, 1567 &s3c_camif_subdev_ctrl_ops, 1568 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR, 1569 ~0x981f, V4L2_COLORFX_NONE); 1570 1571 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler, 1572 &s3c_camif_subdev_ctrl_ops, 1573 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0); 1574 } 1575 1576 if (handler->error) { 1577 v4l2_ctrl_handler_free(handler); 1578 media_entity_cleanup(&sd->entity); 1579 return handler->error; 1580 } 1581 1582 if (camif->variant->has_img_effect) 1583 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx, 1584 V4L2_COLORFX_SET_CBCR, false); 1585 1586 sd->ctrl_handler = handler; 1587 v4l2_set_subdevdata(sd, camif); 1588 1589 return 0; 1590} 1591 1592void s3c_camif_unregister_subdev(struct camif_dev *camif) 1593{ 1594 struct v4l2_subdev *sd = &camif->subdev; 1595 1596 /* Return if not registered */ 1597 if (v4l2_get_subdevdata(sd) == NULL) 1598 return; 1599 1600 v4l2_device_unregister_subdev(sd); 1601 media_entity_cleanup(&sd->entity); 1602 v4l2_ctrl_handler_free(&camif->ctrl_handler); 1603 v4l2_set_subdevdata(sd, NULL); 1604} 1605 1606int s3c_camif_set_defaults(struct camif_dev *camif) 1607{ 1608 unsigned int ip_rev = camif->variant->ip_revision; 1609 int i; 1610 1611 for (i = 0; i < CAMIF_VP_NUM; i++) { 1612 struct camif_vp *vp = &camif->vp[i]; 1613 struct camif_frame *f = &vp->out_frame; 1614 1615 vp->camif = camif; 1616 vp->id = i; 1617 vp->offset = camif->variant->vp_offset; 1618 1619 if (ip_rev == S3C244X_CAMIF_IP_REV) 1620 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW : 1621 FMT_FL_S3C24XX_CODEC; 1622 else 1623 vp->fmt_flags = FMT_FL_S3C64XX; 1624 1625 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0); 1626 BUG_ON(vp->out_fmt == NULL); 1627 1628 memset(f, 0, sizeof(*f)); 1629 f->f_width = CAMIF_DEF_WIDTH; 1630 f->f_height = CAMIF_DEF_HEIGHT; 1631 f->rect.width = CAMIF_DEF_WIDTH; 1632 f->rect.height = CAMIF_DEF_HEIGHT; 1633 1634 /* Scaler is always enabled */ 1635 vp->scaler.enable = 1; 1636 1637 vp->payload = (f->f_width * f->f_height * 1638 vp->out_fmt->depth) / 8; 1639 } 1640 1641 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt)); 1642 camif->mbus_fmt.width = CAMIF_DEF_WIDTH; 1643 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT; 1644 camif->mbus_fmt.code = camif_mbus_formats[0]; 1645 1646 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop)); 1647 camif->camif_crop.width = CAMIF_DEF_WIDTH; 1648 camif->camif_crop.height = CAMIF_DEF_HEIGHT; 1649 1650 return 0; 1651} 1652