drivers/media/platform/exynos4-is/fimc-capture.c

   1 /*
   2  * Samsung S5P/EXYNOS4 SoC series camera interface (camera capture) driver
   3  *
   4  * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
   5  * Sylwester Nawrocki <s.nawrocki@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/errno.h>
  16 #include <linux/bug.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/device.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/list.h>
  21 #include <linux/slab.h>
  22
  23 #include <linux/videodev2.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-mem2mem.h>
  27 #include <media/videobuf2-core.h>
  28 #include <media/videobuf2-dma-contig.h>
  29
  30 #include "common.h"
  31 #include "fimc-core.h"
  32 #include "fimc-reg.h"
  33 #include "media-dev.h"
  34
  35 static int fimc_capture_hw_init(struct fimc_dev *fimc)
  36 {
  37         struct fimc_source_info *si = &fimc->vid_cap.source_config;
  38         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
  39         int ret;
  40         unsigned long flags;
  41
  42         if (ctx == NULL || ctx->s_frame.fmt == NULL)
  43                 return -EINVAL;
  44
  45         if (si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) {
  46                 ret = fimc_hw_camblk_cfg_writeback(fimc);
  47                 if (ret < 0)
  48                         return ret;
  49         }
  50
  51         spin_lock_irqsave(&fimc->slock, flags);
  52         fimc_prepare_dma_offset(ctx, &ctx->d_frame);
  53         fimc_set_yuv_order(ctx);
  54
  55         fimc_hw_set_camera_polarity(fimc, si);
  56         fimc_hw_set_camera_type(fimc, si);
  57         fimc_hw_set_camera_source(fimc, si);
  58         fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
  59
  60         ret = fimc_set_scaler_info(ctx);
  61         if (!ret) {
  62                 fimc_hw_set_input_path(ctx);
  63                 fimc_hw_set_prescaler(ctx);
  64                 fimc_hw_set_mainscaler(ctx);
  65                 fimc_hw_set_target_format(ctx);
  66                 fimc_hw_set_rotation(ctx);
  67                 fimc_hw_set_effect(ctx);
  68                 fimc_hw_set_output_path(ctx);
  69                 fimc_hw_set_out_dma(ctx);
  70                 if (fimc->drv_data->alpha_color)
  71                         fimc_hw_set_rgb_alpha(ctx);
  72                 clear_bit(ST_CAPT_APPLY_CFG, &fimc->state);
  73         }
  74         spin_unlock_irqrestore(&fimc->slock, flags);
  75         return ret;
  76 }
  77
  78 /*
  79  * Reinitialize the driver so it is ready to start the streaming again.
  80  * Set fimc->state to indicate stream off and the hardware shut down state.
  81  * If not suspending (@suspend is false), return any buffers to videobuf2.
  82  * Otherwise put any owned buffers onto the pending buffers queue, so they
  83  * can be re-spun when the device is being resumed. Also perform FIMC
  84  * software reset and disable streaming on the whole pipeline if required.
  85  */
  86 static int fimc_capture_state_cleanup(struct fimc_dev *fimc, bool suspend)
  87 {
  88         struct fimc_vid_cap *cap = &fimc->vid_cap;
  89         struct fimc_vid_buffer *buf;
  90         unsigned long flags;
  91         bool streaming;
  92
  93         spin_lock_irqsave(&fimc->slock, flags);
  94         streaming = fimc->state & (1 << ST_CAPT_ISP_STREAM);
  95
  96         fimc->state &= ~(1 << ST_CAPT_RUN | 1 << ST_CAPT_SHUT |
  97                          1 << ST_CAPT_STREAM | 1 << ST_CAPT_ISP_STREAM);
  98         if (suspend)
  99                 fimc->state |= (1 << ST_CAPT_SUSPENDED);
 100         else
 101                 fimc->state &= ~(1 << ST_CAPT_PEND | 1 << ST_CAPT_SUSPENDED);
 102
 103         /* Release unused buffers */
 104         while (!suspend && !list_empty(&cap->pending_buf_q)) {
 105                 buf = fimc_pending_queue_pop(cap);
 106                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 107         }
 108         /* If suspending put unused buffers onto pending queue */
 109         while (!list_empty(&cap->active_buf_q)) {
 110                 buf = fimc_active_queue_pop(cap);
 111                 if (suspend)
 112                         fimc_pending_queue_add(cap, buf);
 113                 else
 114                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 115         }
 116
 117         fimc_hw_reset(fimc);
 118         cap->buf_index = 0;
 119
 120         spin_unlock_irqrestore(&fimc->slock, flags);
 121
 122         if (streaming)
 123                 return fimc_pipeline_call(fimc, set_stream,
 124                                           &fimc->pipeline, 0);
 125         else
 126                 return 0;
 127 }
 128
 129 static int fimc_stop_capture(struct fimc_dev *fimc, bool suspend)
 130 {
 131         unsigned long flags;
 132
 133         if (!fimc_capture_active(fimc))
 134                 return 0;
 135
 136         spin_lock_irqsave(&fimc->slock, flags);
 137         set_bit(ST_CAPT_SHUT, &fimc->state);
 138         fimc_deactivate_capture(fimc);
 139         spin_unlock_irqrestore(&fimc->slock, flags);
 140
 141         wait_event_timeout(fimc->irq_queue,
 142                            !test_bit(ST_CAPT_SHUT, &fimc->state),
 143                            (2*HZ/10)); /* 200 ms */
 144
 145         return fimc_capture_state_cleanup(fimc, suspend);
 146 }
 147
 148 /**
 149  * fimc_capture_config_update - apply the camera interface configuration
 150  *
 151  * To be called from within the interrupt handler with fimc.slock
 152  * spinlock held. It updates the camera pixel crop, rotation and
 153  * image flip in H/W.
 154  */
 155 static int fimc_capture_config_update(struct fimc_ctx *ctx)
 156 {
 157         struct fimc_dev *fimc = ctx->fimc_dev;
 158         int ret;
 159
 160         fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
 161
 162         ret = fimc_set_scaler_info(ctx);
 163         if (ret)
 164                 return ret;
 165
 166         fimc_hw_set_prescaler(ctx);
 167         fimc_hw_set_mainscaler(ctx);
 168         fimc_hw_set_target_format(ctx);
 169         fimc_hw_set_rotation(ctx);
 170         fimc_hw_set_effect(ctx);
 171         fimc_prepare_dma_offset(ctx, &ctx->d_frame);
 172         fimc_hw_set_out_dma(ctx);
 173         if (fimc->drv_data->alpha_color)
 174                 fimc_hw_set_rgb_alpha(ctx);
 175
 176         clear_bit(ST_CAPT_APPLY_CFG, &fimc->state);
 177         return ret;
 178 }
 179
 180 void fimc_capture_irq_handler(struct fimc_dev *fimc, int deq_buf)
 181 {
 182         struct v4l2_subdev *csis = fimc->pipeline.subdevs[IDX_CSIS];
 183         struct fimc_vid_cap *cap = &fimc->vid_cap;
 184         struct fimc_frame *f = &cap->ctx->d_frame;
 185         struct fimc_vid_buffer *v_buf;
 186         struct timeval *tv;
 187         struct timespec ts;
 188
 189         if (test_and_clear_bit(ST_CAPT_SHUT, &fimc->state)) {
 190                 wake_up(&fimc->irq_queue);
 191                 goto done;
 192         }
 193
 194         if (!list_empty(&cap->active_buf_q) &&
 195             test_bit(ST_CAPT_RUN, &fimc->state) && deq_buf) {
 196                 ktime_get_real_ts(&ts);
 197
 198                 v_buf = fimc_active_queue_pop(cap);
 199
 200                 tv = &v_buf->vb.v4l2_buf.timestamp;
 201                 tv->tv_sec = ts.tv_sec;
 202                 tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 203                 v_buf->vb.v4l2_buf.sequence = cap->frame_count++;
 204
 205                 vb2_buffer_done(&v_buf->vb, VB2_BUF_STATE_DONE);
 206         }
 207
 208         if (!list_empty(&cap->pending_buf_q)) {
 209
 210                 v_buf = fimc_pending_queue_pop(cap);
 211                 fimc_hw_set_output_addr(fimc, &v_buf->paddr, cap->buf_index);
 212                 v_buf->index = cap->buf_index;
 213
 214                 /* Move the buffer to the capture active queue */
 215                 fimc_active_queue_add(cap, v_buf);
 216
 217                 dbg("next frame: %d, done frame: %d",
 218                     fimc_hw_get_frame_index(fimc), v_buf->index);
 219
 220                 if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
 221                         cap->buf_index = 0;
 222         }
 223         /*
 224          * Set up a buffer at MIPI-CSIS if current image format
 225          * requires the frame embedded data capture.
 226          */
 227         if (f->fmt->mdataplanes && !list_empty(&cap->active_buf_q)) {
 228                 unsigned int plane = ffs(f->fmt->mdataplanes) - 1;
 229                 unsigned int size = f->payload[plane];
 230                 s32 index = fimc_hw_get_frame_index(fimc);
 231                 void *vaddr;
 232
 233                 list_for_each_entry(v_buf, &cap->active_buf_q, list) {
 234                         if (v_buf->index != index)
 235                                 continue;
 236                         vaddr = vb2_plane_vaddr(&v_buf->vb, plane);
 237                         v4l2_subdev_call(csis, video, s_rx_buffer,
 238                                          vaddr, &size);
 239                         break;
 240                 }
 241         }
 242
 243         if (cap->active_buf_cnt == 0) {
 244                 if (deq_buf)
 245                         clear_bit(ST_CAPT_RUN, &fimc->state);
 246
 247                 if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
 248                         cap->buf_index = 0;
 249         } else {
 250                 set_bit(ST_CAPT_RUN, &fimc->state);
 251         }
 252
 253         if (test_bit(ST_CAPT_APPLY_CFG, &fimc->state))
 254                 fimc_capture_config_update(cap->ctx);
 255 done:
 256         if (cap->active_buf_cnt == 1) {
 257                 fimc_deactivate_capture(fimc);
 258                 clear_bit(ST_CAPT_STREAM, &fimc->state);
 259         }
 260
 261         dbg("frame: %d, active_buf_cnt: %d",
 262             fimc_hw_get_frame_index(fimc), cap->active_buf_cnt);
 263 }
 264
 265
 266 static int start_streaming(struct vb2_queue *q, unsigned int count)
 267 {
 268         struct fimc_ctx *ctx = q->drv_priv;
 269         struct fimc_dev *fimc = ctx->fimc_dev;
 270         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
 271         int min_bufs;
 272         int ret;
 273
 274         vid_cap->frame_count = 0;
 275
 276         ret = fimc_capture_hw_init(fimc);
 277         if (ret) {
 278                 fimc_capture_state_cleanup(fimc, false);
 279                 return ret;
 280         }
 281
 282         set_bit(ST_CAPT_PEND, &fimc->state);
 283
 284         min_bufs = fimc->vid_cap.reqbufs_count > 1 ? 2 : 1;
 285
 286         if (vid_cap->active_buf_cnt >= min_bufs &&
 287             !test_and_set_bit(ST_CAPT_STREAM, &fimc->state)) {
 288                 fimc_activate_capture(ctx);
 289
 290                 if (!test_and_set_bit(ST_CAPT_ISP_STREAM, &fimc->state))
 291                         return fimc_pipeline_call(fimc, set_stream,
 292                                                   &fimc->pipeline, 1);
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int stop_streaming(struct vb2_queue *q)
 299 {
 300         struct fimc_ctx *ctx = q->drv_priv;
 301         struct fimc_dev *fimc = ctx->fimc_dev;
 302
 303         if (!fimc_capture_active(fimc))
 304                 return -EINVAL;
 305
 306         return fimc_stop_capture(fimc, false);
 307 }
 308
 309 int fimc_capture_suspend(struct fimc_dev *fimc)
 310 {
 311         bool suspend = fimc_capture_busy(fimc);
 312
 313         int ret = fimc_stop_capture(fimc, suspend);
 314         if (ret)
 315                 return ret;
 316         return fimc_pipeline_call(fimc, close, &fimc->pipeline);
 317 }
 318
 319 static void buffer_queue(struct vb2_buffer *vb);
 320
 321 int fimc_capture_resume(struct fimc_dev *fimc)
 322 {
 323         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
 324         struct exynos_video_entity *ve = &vid_cap->ve;
 325         struct fimc_vid_buffer *buf;
 326         int i;
 327
 328         if (!test_and_clear_bit(ST_CAPT_SUSPENDED, &fimc->state))
 329                 return 0;
 330
 331         INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
 332         vid_cap->buf_index = 0;
 333         fimc_pipeline_call(fimc, open, &fimc->pipeline,
 334                            &ve->vdev.entity, false);
 335         fimc_capture_hw_init(fimc);
 336
 337         clear_bit(ST_CAPT_SUSPENDED, &fimc->state);
 338
 339         for (i = 0; i < vid_cap->reqbufs_count; i++) {
 340                 if (list_empty(&vid_cap->pending_buf_q))
 341                         break;
 342                 buf = fimc_pending_queue_pop(vid_cap);
 343                 buffer_queue(&buf->vb);
 344         }
 345         return 0;
 346
 347 }
 348
 349 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
 350                        unsigned int *num_buffers, unsigned int *num_planes,
 351                        unsigned int sizes[], void *allocators[])
 352 {
 353         const struct v4l2_pix_format_mplane *pixm = NULL;
 354         struct fimc_ctx *ctx = vq->drv_priv;
 355         struct fimc_frame *frame = &ctx->d_frame;
 356         struct fimc_fmt *fmt = frame->fmt;
 357         unsigned long wh;
 358         int i;
 359
 360         if (pfmt) {
 361                 pixm = &pfmt->fmt.pix_mp;
 362                 fmt = fimc_find_format(&pixm->pixelformat, NULL,
 363                                        FMT_FLAGS_CAM | FMT_FLAGS_M2M, -1);
 364                 wh = pixm->width * pixm->height;
 365         } else {
 366                 wh = frame->f_width * frame->f_height;
 367         }
 368
 369         if (fmt == NULL)
 370                 return -EINVAL;
 371
 372         *num_planes = fmt->memplanes;
 373
 374         for (i = 0; i < fmt->memplanes; i++) {
 375                 unsigned int size = (wh * fmt->depth[i]) / 8;
 376                 if (pixm)
 377                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
 378                 else if (fimc_fmt_is_user_defined(fmt->color))
 379                         sizes[i] = frame->payload[i];
 380                 else
 381                         sizes[i] = max_t(u32, size, frame->payload[i]);
 382
 383                 allocators[i] = ctx->fimc_dev->alloc_ctx;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int buffer_prepare(struct vb2_buffer *vb)
 390 {
 391         struct vb2_queue *vq = vb->vb2_queue;
 392         struct fimc_ctx *ctx = vq->drv_priv;
 393         int i;
 394
 395         if (ctx->d_frame.fmt == NULL)
 396                 return -EINVAL;
 397
 398         for (i = 0; i < ctx->d_frame.fmt->memplanes; i++) {
 399                 unsigned long size = ctx->d_frame.payload[i];
 400
 401                 if (vb2_plane_size(vb, i) < size) {
 402                         v4l2_err(&ctx->fimc_dev->vid_cap.ve.vdev,
 403                                  "User buffer too small (%ld < %ld)\n",
 404                                  vb2_plane_size(vb, i), size);
 405                         return -EINVAL;
 406                 }
 407                 vb2_set_plane_payload(vb, i, size);
 408         }
 409
 410         return 0;
 411 }
 412
 413 static void buffer_queue(struct vb2_buffer *vb)
 414 {
 415         struct fimc_vid_buffer *buf
 416                 = container_of(vb, struct fimc_vid_buffer, vb);
 417         struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 418         struct fimc_dev *fimc = ctx->fimc_dev;
 419         struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
 420         struct exynos_video_entity *ve = &vid_cap->ve;
 421         unsigned long flags;
 422         int min_bufs;
 423
 424         spin_lock_irqsave(&fimc->slock, flags);
 425         fimc_prepare_addr(ctx, &buf->vb, &ctx->d_frame, &buf->paddr);
 426
 427         if (!test_bit(ST_CAPT_SUSPENDED, &fimc->state) &&
 428             !test_bit(ST_CAPT_STREAM, &fimc->state) &&
 429             vid_cap->active_buf_cnt < FIMC_MAX_OUT_BUFS) {
 430                 /* Setup the buffer directly for processing. */
 431                 int buf_id = (vid_cap->reqbufs_count == 1) ? -1 :
 432                                 vid_cap->buf_index;
 433
 434                 fimc_hw_set_output_addr(fimc, &buf->paddr, buf_id);
 435                 buf->index = vid_cap->buf_index;
 436                 fimc_active_queue_add(vid_cap, buf);
 437
 438                 if (++vid_cap->buf_index >= FIMC_MAX_OUT_BUFS)
 439                         vid_cap->buf_index = 0;
 440         } else {
 441                 fimc_pending_queue_add(vid_cap, buf);
 442         }
 443
 444         min_bufs = vid_cap->reqbufs_count > 1 ? 2 : 1;
 445
 446
 447         if (vb2_is_streaming(&vid_cap->vbq) &&
 448             vid_cap->active_buf_cnt >= min_bufs &&
 449             !test_and_set_bit(ST_CAPT_STREAM, &fimc->state)) {
 450                 int ret;
 451
 452                 fimc_activate_capture(ctx);
 453                 spin_unlock_irqrestore(&fimc->slock, flags);
 454
 455                 if (test_and_set_bit(ST_CAPT_ISP_STREAM, &fimc->state))
 456                         return;
 457
 458                 ret = fimc_pipeline_call(fimc, set_stream, &fimc->pipeline, 1);
 459                 if (ret < 0)
 460                         v4l2_err(&ve->vdev, "stream on failed: %d\n", ret);
 461                 return;
 462         }
 463         spin_unlock_irqrestore(&fimc->slock, flags);
 464 }
 465
 466 static struct vb2_ops fimc_capture_qops = {
 467         .queue_setup            = queue_setup,
 468         .buf_prepare            = buffer_prepare,
 469         .buf_queue              = buffer_queue,
 470         .wait_prepare           = vb2_ops_wait_prepare,
 471         .wait_finish            = vb2_ops_wait_finish,
 472         .start_streaming        = start_streaming,
 473         .stop_streaming         = stop_streaming,
 474 };
 475
 476 static int fimc_capture_set_default_format(struct fimc_dev *fimc);
 477
 478 static int fimc_capture_open(struct file *file)
 479 {
 480         struct fimc_dev *fimc = video_drvdata(file);
 481         struct fimc_vid_cap *vc = &fimc->vid_cap;
 482         struct exynos_video_entity *ve = &vc->ve;
 483         int ret = -EBUSY;
 484
 485         dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
 486
 487         mutex_lock(&fimc->lock);
 488
 489         if (fimc_m2m_active(fimc))
 490                 goto unlock;
 491
 492         set_bit(ST_CAPT_BUSY, &fimc->state);
 493         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 494         if (ret < 0)
 495                 goto unlock;
 496
 497         ret = v4l2_fh_open(file);
 498         if (ret) {
 499                 pm_runtime_put_sync(&fimc->pdev->dev);
 500                 goto unlock;
 501         }
 502
 503         if (v4l2_fh_is_singular_file(file)) {
 504                 fimc_md_graph_lock(ve);
 505
 506                 ret = fimc_pipeline_call(fimc, open, &fimc->pipeline,
 507                                          &fimc->vid_cap.ve.vdev.entity, true);
 508                 if (ret == 0)
 509                         ret = fimc_capture_set_default_format(fimc);
 510
 511                 if (ret == 0 && vc->user_subdev_api && vc->inh_sensor_ctrls) {
 512                         /*
 513                          * Recreate controls of the the video node to drop
 514                          * any controls inherited from the sensor subdev.
 515                          */
 516                         fimc_ctrls_delete(vc->ctx);
 517
 518                         ret = fimc_ctrls_create(vc->ctx);
 519                         if (ret == 0)
 520                                 vc->inh_sensor_ctrls = false;
 521                 }
 522                 if (ret == 0)
 523                         ve->vdev.entity.use_count++;
 524
 525                 fimc_md_graph_unlock(ve);
 526
 527                 if (ret < 0) {
 528                         clear_bit(ST_CAPT_BUSY, &fimc->state);
 529                         pm_runtime_put_sync(&fimc->pdev->dev);
 530                         v4l2_fh_release(file);
 531                 }
 532         }
 533 unlock:
 534         mutex_unlock(&fimc->lock);
 535         return ret;
 536 }
 537
 538 static int fimc_capture_release(struct file *file)
 539 {
 540         struct fimc_dev *fimc = video_drvdata(file);
 541         struct fimc_vid_cap *vc = &fimc->vid_cap;
 542         bool close = v4l2_fh_is_singular_file(file);
 543         int ret;
 544
 545         dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
 546
 547         mutex_lock(&fimc->lock);
 548
 549         if (close && vc->streaming) {
 550                 media_entity_pipeline_stop(&vc->ve.vdev.entity);
 551                 vc->streaming = false;
 552         }
 553
 554         ret = vb2_fop_release(file);
 555
 556         if (close) {
 557                 clear_bit(ST_CAPT_BUSY, &fimc->state);
 558                 fimc_stop_capture(fimc, false);
 559                 fimc_pipeline_call(fimc, close, &fimc->pipeline);
 560                 clear_bit(ST_CAPT_SUSPENDED, &fimc->state);
 561
 562                 fimc_md_graph_lock(&vc->ve);
 563                 vc->ve.vdev.entity.use_count--;
 564                 fimc_md_graph_unlock(&vc->ve);
 565         }
 566
 567         pm_runtime_put_sync(&fimc->pdev->dev);
 568         mutex_unlock(&fimc->lock);
 569
 570         return ret;
 571 }
 572
 573 static const struct v4l2_file_operations fimc_capture_fops = {
 574         .owner          = THIS_MODULE,
 575         .open           = fimc_capture_open,
 576         .release        = fimc_capture_release,
 577         .poll           = vb2_fop_poll,
 578         .unlocked_ioctl = video_ioctl2,
 579         .mmap           = vb2_fop_mmap,
 580 };
 581
 582 /*
 583  * Format and crop negotiation helpers
 584  */
 585
 586 static struct fimc_fmt *fimc_capture_try_format(struct fimc_ctx *ctx,
 587                                                 u32 *width, u32 *height,
 588                                                 u32 *code, u32 *fourcc, int pad)
 589 {
 590         bool rotation = ctx->rotation == 90 || ctx->rotation == 270;
 591         struct fimc_dev *fimc = ctx->fimc_dev;
 592         const struct fimc_variant *var = fimc->variant;
 593         const struct fimc_pix_limit *pl = var->pix_limit;
 594         struct fimc_frame *dst = &ctx->d_frame;
 595         u32 depth, min_w, max_w, min_h, align_h = 3;
 596         u32 mask = FMT_FLAGS_CAM;
 597         struct fimc_fmt *ffmt;
 598
 599         /* Conversion from/to JPEG or User Defined format is not supported */
 600         if (code && ctx->s_frame.fmt && pad == FIMC_SD_PAD_SOURCE &&
 601             fimc_fmt_is_user_defined(ctx->s_frame.fmt->color))
 602                 *code = ctx->s_frame.fmt->mbus_code;
 603
 604         if (fourcc && *fourcc != V4L2_PIX_FMT_JPEG && pad == FIMC_SD_PAD_SOURCE)
 605                 mask |= FMT_FLAGS_M2M;
 606
 607         if (pad == FIMC_SD_PAD_SINK_FIFO)
 608                 mask = FMT_FLAGS_WRITEBACK;
 609
 610         ffmt = fimc_find_format(fourcc, code, mask, 0);
 611         if (WARN_ON(!ffmt))
 612                 return NULL;
 613
 614         if (code)
 615                 *code = ffmt->mbus_code;
 616         if (fourcc)
 617                 *fourcc = ffmt->fourcc;
 618
 619         if (pad != FIMC_SD_PAD_SOURCE) {
 620                 max_w = fimc_fmt_is_user_defined(ffmt->color) ?
 621                         pl->scaler_dis_w : pl->scaler_en_w;
 622                 /* Apply the camera input interface pixel constraints */
 623                 v4l_bound_align_image(width, max_t(u32, *width, 32), max_w, 4,
 624                                       height, max_t(u32, *height, 32),
 625                                       FIMC_CAMIF_MAX_HEIGHT,
 626                                       fimc_fmt_is_user_defined(ffmt->color) ?
 627                                       3 : 1,
 628                                       0);
 629                 return ffmt;
 630         }
 631         /* Can't scale or crop in transparent (JPEG) transfer mode */
 632         if (fimc_fmt_is_user_defined(ffmt->color)) {
 633                 *width  = ctx->s_frame.f_width;
 634                 *height = ctx->s_frame.f_height;
 635                 return ffmt;
 636         }
 637         /* Apply the scaler and the output DMA constraints */
 638         max_w = rotation ? pl->out_rot_en_w : pl->out_rot_dis_w;
 639         if (ctx->state & FIMC_COMPOSE) {
 640                 min_w = dst->offs_h + dst->width;
 641                 min_h = dst->offs_v + dst->height;
 642         } else {
 643                 min_w = var->min_out_pixsize;
 644                 min_h = var->min_out_pixsize;
 645         }
 646         if (var->min_vsize_align == 1 && !rotation)
 647                 align_h = fimc_fmt_is_rgb(ffmt->color) ? 0 : 1;
 648
 649         depth = fimc_get_format_depth(ffmt);
 650         v4l_bound_align_image(width, min_w, max_w,
 651                               ffs(var->min_out_pixsize) - 1,
 652                               height, min_h, FIMC_CAMIF_MAX_HEIGHT,
 653                               align_h,
 654                               64/(ALIGN(depth, 8)));
 655
 656         dbg("pad%d: code: 0x%x, %dx%d. dst fmt: %dx%d",
 657             pad, code ? *code : 0, *width, *height,
 658             dst->f_width, dst->f_height);
 659
 660         return ffmt;
 661 }
 662
 663 static void fimc_capture_try_selection(struct fimc_ctx *ctx,
 664                                        struct v4l2_rect *r,
 665                                        int target)
 666 {
 667         bool rotate = ctx->rotation == 90 || ctx->rotation == 270;
 668         struct fimc_dev *fimc = ctx->fimc_dev;
 669         const struct fimc_variant *var = fimc->variant;
 670         const struct fimc_pix_limit *pl = var->pix_limit;
 671         struct fimc_frame *sink = &ctx->s_frame;
 672         u32 max_w, max_h, min_w = 0, min_h = 0, min_sz;
 673         u32 align_sz = 0, align_h = 4;
 674         u32 max_sc_h, max_sc_v;
 675
 676         /* In JPEG transparent transfer mode cropping is not supported */
 677         if (fimc_fmt_is_user_defined(ctx->d_frame.fmt->color)) {
 678                 r->width  = sink->f_width;
 679                 r->height = sink->f_height;
 680                 r->left   = r->top = 0;
 681                 return;
 682         }
 683         if (target == V4L2_SEL_TGT_COMPOSE) {
 684                 if (ctx->rotation != 90 && ctx->rotation != 270)
 685                         align_h = 1;
 686                 max_sc_h = min(SCALER_MAX_HRATIO, 1 << (ffs(sink->width) - 3));
 687                 max_sc_v = min(SCALER_MAX_VRATIO, 1 << (ffs(sink->height) - 1));
 688                 min_sz = var->min_out_pixsize;
 689         } else {
 690                 u32 depth = fimc_get_format_depth(sink->fmt);
 691                 align_sz = 64/ALIGN(depth, 8);
 692                 min_sz = var->min_inp_pixsize;
 693                 min_w = min_h = min_sz;
 694                 max_sc_h = max_sc_v = 1;
 695         }
 696         /*
 697          * For the compose rectangle the following constraints must be met:
 698          * - it must fit in the sink pad format rectangle (f_width/f_height);
 699          * - maximum downscaling ratio is 64;
 700          * - maximum crop size depends if the rotator is used or not;
 701          * - the sink pad format width/height must be 4 multiple of the
 702          *   prescaler ratios determined by sink pad size and source pad crop,
 703          *   the prescaler ratio is returned by fimc_get_scaler_factor().
 704          */
 705         max_w = min_t(u32,
 706                       rotate ? pl->out_rot_en_w : pl->out_rot_dis_w,
 707                       rotate ? sink->f_height : sink->f_width);
 708         max_h = min_t(u32, FIMC_CAMIF_MAX_HEIGHT, sink->f_height);
 709
 710         if (target == V4L2_SEL_TGT_COMPOSE) {
 711                 min_w = min_t(u32, max_w, sink->f_width / max_sc_h);
 712                 min_h = min_t(u32, max_h, sink->f_height / max_sc_v);
 713                 if (rotate) {
 714                         swap(max_sc_h, max_sc_v);
 715                         swap(min_w, min_h);
 716                 }
 717         }
 718         v4l_bound_align_image(&r->width, min_w, max_w, ffs(min_sz) - 1,
 719                               &r->height, min_h, max_h, align_h,
 720                               align_sz);
 721         /* Adjust left/top if crop/compose rectangle is out of bounds */
 722         r->left = clamp_t(u32, r->left, 0, sink->f_width - r->width);
 723         r->top  = clamp_t(u32, r->top, 0, sink->f_height - r->height);
 724         r->left = round_down(r->left, var->hor_offs_align);
 725
 726         dbg("target %#x: (%d,%d)/%dx%d, sink fmt: %dx%d",
 727             target, r->left, r->top, r->width, r->height,
 728             sink->f_width, sink->f_height);
 729 }
 730
 731 /*
 732  * The video node ioctl operations
 733  */
 734 static int fimc_cap_querycap(struct file *file, void *priv,
 735                                         struct v4l2_capability *cap)
 736 {
 737         struct fimc_dev *fimc = video_drvdata(file);
 738
 739         __fimc_vidioc_querycap(&fimc->pdev->dev, cap, V4L2_CAP_STREAMING |
 740                                         V4L2_CAP_VIDEO_CAPTURE_MPLANE);
 741         return 0;
 742 }
 743
 744 static int fimc_cap_enum_fmt_mplane(struct file *file, void *priv,
 745                                     struct v4l2_fmtdesc *f)
 746 {
 747         struct fimc_fmt *fmt;
 748
 749         fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM | FMT_FLAGS_M2M,
 750                                f->index);
 751         if (!fmt)
 752                 return -EINVAL;
 753         strncpy(f->description, fmt->name, sizeof(f->description) - 1);
 754         f->pixelformat = fmt->fourcc;
 755         if (fmt->fourcc == V4L2_MBUS_FMT_JPEG_1X8)
 756                 f->flags |= V4L2_FMT_FLAG_COMPRESSED;
 757         return 0;
 758 }
 759
 760 static struct media_entity *fimc_pipeline_get_head(struct media_entity *me)
 761 {
 762         struct media_pad *pad = &me->pads[0];
 763
 764         while (!(pad->flags & MEDIA_PAD_FL_SOURCE)) {
 765                 pad = media_entity_remote_pad(pad);
 766                 if (!pad)
 767                         break;
 768                 me = pad->entity;
 769                 pad = &me->pads[0];
 770         }
 771
 772         return me;
 773 }
 774
 775 /**
 776  * fimc_pipeline_try_format - negotiate and/or set formats at pipeline
 777  *                            elements
 778  * @ctx: FIMC capture context
 779  * @tfmt: media bus format to try/set on subdevs
 780  * @fmt_id: fimc pixel format id corresponding to returned @tfmt (output)
 781  * @set: true to set format on subdevs, false to try only
 782  */
 783 static int fimc_pipeline_try_format(struct fimc_ctx *ctx,
 784                                     struct v4l2_mbus_framefmt *tfmt,
 785                                     struct fimc_fmt **fmt_id,
 786                                     bool set)
 787 {
 788         struct fimc_dev *fimc = ctx->fimc_dev;
 789         struct v4l2_subdev *sd = fimc->pipeline.subdevs[IDX_SENSOR];
 790         struct v4l2_subdev_format sfmt;
 791         struct v4l2_mbus_framefmt *mf = &sfmt.format;
 792         struct media_entity *me;
 793         struct fimc_fmt *ffmt;
 794         struct media_pad *pad;
 795         int ret, i = 1;
 796         u32 fcc;
 797
 798         if (WARN_ON(!sd || !tfmt))
 799                 return -EINVAL;
 800
 801         memset(&sfmt, 0, sizeof(sfmt));
 802         sfmt.format = *tfmt;
 803         sfmt.which = set ? V4L2_SUBDEV_FORMAT_ACTIVE : V4L2_SUBDEV_FORMAT_TRY;
 804
 805         me = fimc_pipeline_get_head(&sd->entity);
 806
 807         while (1) {
 808                 ffmt = fimc_find_format(NULL, mf->code != 0 ? &mf->code : NULL,
 809                                         FMT_FLAGS_CAM, i++);
 810                 if (ffmt == NULL) {
 811                         /*
 812                          * Notify user-space if common pixel code for
 813                          * host and sensor does not exist.
 814                          */
 815                         return -EINVAL;
 816                 }
 817                 mf->code = tfmt->code = ffmt->mbus_code;
 818
 819                 /* set format on all pipeline subdevs */
 820                 while (me != &fimc->vid_cap.subdev.entity) {
 821                         sd = media_entity_to_v4l2_subdev(me);
 822
 823                         sfmt.pad = 0;
 824                         ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &sfmt);
 825                         if (ret)
 826                                 return ret;
 827
 828                         if (me->pads[0].flags & MEDIA_PAD_FL_SINK) {
 829                                 sfmt.pad = me->num_pads - 1;
 830                                 mf->code = tfmt->code;
 831                                 ret = v4l2_subdev_call(sd, pad, set_fmt, NULL,
 832                                                                         &sfmt);
 833                                 if (ret)
 834                                         return ret;
 835                         }
 836
 837                         pad = media_entity_remote_pad(&me->pads[sfmt.pad]);
 838                         if (!pad)
 839                                 return -EINVAL;
 840                         me = pad->entity;
 841                 }
 842
 843                 if (mf->code != tfmt->code)
 844                         continue;
 845
 846                 fcc = ffmt->fourcc;
 847                 tfmt->width  = mf->width;
 848                 tfmt->height = mf->height;
 849                 ffmt = fimc_capture_try_format(ctx, &tfmt->width, &tfmt->height,
 850                                         NULL, &fcc, FIMC_SD_PAD_SINK_CAM);
 851                 ffmt = fimc_capture_try_format(ctx, &tfmt->width, &tfmt->height,
 852                                         NULL, &fcc, FIMC_SD_PAD_SOURCE);
 853                 if (ffmt && ffmt->mbus_code)
 854                         mf->code = ffmt->mbus_code;
 855                 if (mf->width != tfmt->width || mf->height != tfmt->height)
 856                         continue;
 857                 tfmt->code = mf->code;
 858                 break;
 859         }
 860
 861         if (fmt_id && ffmt)
 862                 *fmt_id = ffmt;
 863         *tfmt = *mf;
 864
 865         return 0;
 866 }
 867
 868 /**
 869  * fimc_get_sensor_frame_desc - query the sensor for media bus frame parameters
 870  * @sensor: pointer to the sensor subdev
 871  * @plane_fmt: provides plane sizes corresponding to the frame layout entries
 872  * @try: true to set the frame parameters, false to query only
 873  *
 874  * This function is used by this driver only for compressed/blob data formats.
 875  */
 876 static int fimc_get_sensor_frame_desc(struct v4l2_subdev *sensor,
 877                                       struct v4l2_plane_pix_format *plane_fmt,
 878                                       unsigned int num_planes, bool try)
 879 {
 880         struct v4l2_mbus_frame_desc fd;
 881         int i, ret;
 882         int pad;
 883
 884         for (i = 0; i < num_planes; i++)
 885                 fd.entry[i].length = plane_fmt[i].sizeimage;
 886
 887         pad = sensor->entity.num_pads - 1;
 888         if (try)
 889                 ret = v4l2_subdev_call(sensor, pad, set_frame_desc, pad, &fd);
 890         else
 891                 ret = v4l2_subdev_call(sensor, pad, get_frame_desc, pad, &fd);
 892
 893         if (ret < 0)
 894                 return ret;
 895
 896         if (num_planes != fd.num_entries)
 897                 return -EINVAL;
 898
 899         for (i = 0; i < num_planes; i++)
 900                 plane_fmt[i].sizeimage = fd.entry[i].length;
 901
 902         if (fd.entry[0].length > FIMC_MAX_JPEG_BUF_SIZE) {
 903                 v4l2_err(sensor->v4l2_dev,  "Unsupported buffer size: %u\n",
 904                          fd.entry[0].length);
 905
 906                 return -EINVAL;
 907         }
 908
 909         return 0;
 910 }
 911
 912 static int fimc_cap_g_fmt_mplane(struct file *file, void *fh,
 913                                  struct v4l2_format *f)
 914 {
 915         struct fimc_dev *fimc = video_drvdata(file);
 916
 917         __fimc_get_format(&fimc->vid_cap.ctx->d_frame, f);
 918         return 0;
 919 }
 920
 921 static int fimc_cap_try_fmt_mplane(struct file *file, void *fh,
 922                                    struct v4l2_format *f)
 923 {
 924         struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 925         struct fimc_dev *fimc = video_drvdata(file);
 926         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
 927         struct exynos_video_entity *ve = &fimc->vid_cap.ve;
 928         struct v4l2_mbus_framefmt mf;
 929         struct fimc_fmt *ffmt = NULL;
 930         int ret = 0;
 931
 932         if (fimc_jpeg_fourcc(pix->pixelformat)) {
 933                 fimc_capture_try_format(ctx, &pix->width, &pix->height,
 934                                         NULL, &pix->pixelformat,
 935                                         FIMC_SD_PAD_SINK_CAM);
 936                 ctx->s_frame.f_width  = pix->width;
 937                 ctx->s_frame.f_height = pix->height;
 938         }
 939         ffmt = fimc_capture_try_format(ctx, &pix->width, &pix->height,
 940                                        NULL, &pix->pixelformat,
 941                                        FIMC_SD_PAD_SOURCE);
 942         if (!ffmt)
 943                 return -EINVAL;
 944
 945         if (!fimc->vid_cap.user_subdev_api) {
 946                 mf.width = pix->width;
 947                 mf.height = pix->height;
 948                 mf.code = ffmt->mbus_code;
 949
 950                 fimc_md_graph_lock(ve);
 951                 fimc_pipeline_try_format(ctx, &mf, &ffmt, false);
 952                 fimc_md_graph_unlock(ve);
 953
 954                 pix->width = mf.width;
 955                 pix->height = mf.height;
 956                 if (ffmt)
 957                         pix->pixelformat = ffmt->fourcc;
 958         }
 959
 960         fimc_adjust_mplane_format(ffmt, pix->width, pix->height, pix);
 961
 962         if (ffmt->flags & FMT_FLAGS_COMPRESSED)
 963                 fimc_get_sensor_frame_desc(fimc->pipeline.subdevs[IDX_SENSOR],
 964                                         pix->plane_fmt, ffmt->memplanes, true);
 965
 966         return ret;
 967 }
 968
 969 static void fimc_capture_mark_jpeg_xfer(struct fimc_ctx *ctx,
 970                                         enum fimc_color_fmt color)
 971 {
 972         bool jpeg = fimc_fmt_is_user_defined(color);
 973
 974         ctx->scaler.enabled = !jpeg;
 975         fimc_ctrls_activate(ctx, !jpeg);
 976
 977         if (jpeg)
 978                 set_bit(ST_CAPT_JPEG, &ctx->fimc_dev->state);
 979         else
 980                 clear_bit(ST_CAPT_JPEG, &ctx->fimc_dev->state);
 981 }
 982
 983 static int __fimc_capture_set_format(struct fimc_dev *fimc,
 984                                      struct v4l2_format *f)
 985 {
 986         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
 987         struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 988         struct v4l2_mbus_framefmt *mf = &fimc->vid_cap.ci_fmt;
 989         struct fimc_frame *ff = &ctx->d_frame;
 990         struct fimc_fmt *s_fmt = NULL;
 991         int ret, i;
 992
 993         if (vb2_is_busy(&fimc->vid_cap.vbq))
 994                 return -EBUSY;
 995
 996         /* Pre-configure format at camera interface input, for JPEG only */
 997         if (fimc_jpeg_fourcc(pix->pixelformat)) {
 998                 fimc_capture_try_format(ctx, &pix->width, &pix->height,
 999                                         NULL, &pix->pixelformat,
1000                                         FIMC_SD_PAD_SINK_CAM);
1001                 ctx->s_frame.f_width  = pix->width;
1002                 ctx->s_frame.f_height = pix->height;
1003         }
1004         /* Try the format at the scaler and the DMA output */
1005         ff->fmt = fimc_capture_try_format(ctx, &pix->width, &pix->height,
1006                                           NULL, &pix->pixelformat,
1007                                           FIMC_SD_PAD_SOURCE);
1008         if (!ff->fmt)
1009                 return -EINVAL;
1010
1011         /* Update RGB Alpha control state and value range */
1012         fimc_alpha_ctrl_update(ctx);
1013
1014         /* Try to match format at the host and the sensor */
1015         if (!fimc->vid_cap.user_subdev_api) {
1016                 mf->code   = ff->fmt->mbus_code;
1017                 mf->width  = pix->width;
1018                 mf->height = pix->height;
1019                 ret = fimc_pipeline_try_format(ctx, mf, &s_fmt, true);
1020                 if (ret)
1021                         return ret;
1022
1023                 pix->width  = mf->width;
1024                 pix->height = mf->height;
1025         }
1026
1027         fimc_adjust_mplane_format(ff->fmt, pix->width, pix->height, pix);
1028
1029         if (ff->fmt->flags & FMT_FLAGS_COMPRESSED) {
1030                 ret = fimc_get_sensor_frame_desc(fimc->pipeline.subdevs[IDX_SENSOR],
1031                                         pix->plane_fmt, ff->fmt->memplanes,
1032                                         true);
1033                 if (ret < 0)
1034                         return ret;
1035         }
1036
1037         for (i = 0; i < ff->fmt->memplanes; i++) {
1038                 ff->bytesperline[i] = pix->plane_fmt[i].bytesperline;
1039                 ff->payload[i] = pix->plane_fmt[i].sizeimage;
1040         }
1041
1042         set_frame_bounds(ff, pix->width, pix->height);
1043         /* Reset the composition rectangle if not yet configured */
1044         if (!(ctx->state & FIMC_COMPOSE))
1045                 set_frame_crop(ff, 0, 0, pix->width, pix->height);
1046
1047         fimc_capture_mark_jpeg_xfer(ctx, ff->fmt->color);
1048
1049         /* Reset cropping and set format at the camera interface input */
1050         if (!fimc->vid_cap.user_subdev_api) {
1051                 ctx->s_frame.fmt = s_fmt;
1052                 set_frame_bounds(&ctx->s_frame, pix->width, pix->height);
1053                 set_frame_crop(&ctx->s_frame, 0, 0, pix->width, pix->height);
1054         }
1055
1056         return ret;
1057 }
1058
1059 static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
1060                                  struct v4l2_format *f)
1061 {
1062         struct fimc_dev *fimc = video_drvdata(file);
1063         int ret;
1064
1065         fimc_md_graph_lock(&fimc->vid_cap.ve);
1066         /*
1067          * The graph is walked within __fimc_capture_set_format() to set
1068          * the format at subdevs thus the graph mutex needs to be held at
1069          * this point.
1070          */
1071         ret = __fimc_capture_set_format(fimc, f);
1072
1073         fimc_md_graph_unlock(&fimc->vid_cap.ve);
1074         return ret;
1075 }
1076
1077 static int fimc_cap_enum_input(struct file *file, void *priv,
1078                                struct v4l2_input *i)
1079 {
1080         struct fimc_dev *fimc = video_drvdata(file);
1081         struct v4l2_subdev *sd = fimc->pipeline.subdevs[IDX_SENSOR];
1082
1083         if (i->index != 0)
1084                 return -EINVAL;
1085
1086         i->type = V4L2_INPUT_TYPE_CAMERA;
1087         if (sd)
1088                 strlcpy(i->name, sd->name, sizeof(i->name));
1089         return 0;
1090 }
1091
1092 static int fimc_cap_s_input(struct file *file, void *priv, unsigned int i)
1093 {
1094         return i == 0 ? i : -EINVAL;
1095 }
1096
1097 static int fimc_cap_g_input(struct file *file, void *priv, unsigned int *i)
1098 {
1099         *i = 0;
1100         return 0;
1101 }
1102
1103 /**
1104  * fimc_pipeline_validate - check for formats inconsistencies
1105  *                          between source and sink pad of each link
1106  *
1107  * Return 0 if all formats match or -EPIPE otherwise.
1108  */
1109 static int fimc_pipeline_validate(struct fimc_dev *fimc)
1110 {
1111         struct v4l2_subdev_format sink_fmt, src_fmt;
1112         struct fimc_vid_cap *vc = &fimc->vid_cap;
1113         struct v4l2_subdev *sd = &vc->subdev;
1114         struct media_pad *sink_pad, *src_pad;
1115         int i, ret;
1116
1117         while (1) {
1118                 /*
1119                  * Find current entity sink pad and any remote sink pad linked
1120                  * to it. We stop if there is no sink pad in current entity or
1121                  * it is not linked to any other remote entity.
1122                  */
1123                 src_pad = NULL;
1124
1125                 for (i = 0; i < sd->entity.num_pads; i++) {
1126                         struct media_pad *p = &sd->entity.pads[i];
1127
1128                         if (p->flags & MEDIA_PAD_FL_SINK) {
1129                                 sink_pad = p;
1130                                 src_pad = media_entity_remote_pad(sink_pad);
1131                                 if (src_pad)
1132                                         break;
1133                         }
1134                 }
1135
1136                 if (src_pad == NULL ||
1137                     media_entity_type(src_pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
1138                         break;
1139
1140                 /* Don't call FIMC subdev operation to avoid nested locking */
1141                 if (sd == &vc->subdev) {
1142                         struct fimc_frame *ff = &vc->ctx->s_frame;
1143                         sink_fmt.format.width = ff->f_width;
1144                         sink_fmt.format.height = ff->f_height;
1145                         sink_fmt.format.code = ff->fmt ? ff->fmt->mbus_code : 0;
1146                 } else {
1147                         sink_fmt.pad = sink_pad->index;
1148                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
1149                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
1150                         if (ret < 0 && ret != -ENOIOCTLCMD)
1151                                 return -EPIPE;
1152                 }
1153
1154                 /* Retrieve format at the source pad */
1155                 sd = media_entity_to_v4l2_subdev(src_pad->entity);
1156                 src_fmt.pad = src_pad->index;
1157                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
1158                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
1159                 if (ret < 0 && ret != -ENOIOCTLCMD)
1160                         return -EPIPE;
1161
1162                 if (src_fmt.format.width != sink_fmt.format.width ||
1163                     src_fmt.format.height != sink_fmt.format.height ||
1164                     src_fmt.format.code != sink_fmt.format.code)
1165                         return -EPIPE;
1166
1167                 if (sd == fimc->pipeline.subdevs[IDX_SENSOR] &&
1168                     fimc_user_defined_mbus_fmt(src_fmt.format.code)) {
1169                         struct v4l2_plane_pix_format plane_fmt[FIMC_MAX_PLANES];
1170                         struct fimc_frame *frame = &vc->ctx->d_frame;
1171                         unsigned int i;
1172
1173                         ret = fimc_get_sensor_frame_desc(sd, plane_fmt,
1174                                                          frame->fmt->memplanes,
1175                                                          false);
1176                         if (ret < 0)
1177                                 return -EPIPE;
1178
1179                         for (i = 0; i < frame->fmt->memplanes; i++)
1180                                 if (frame->payload[i] < plane_fmt[i].sizeimage)
1181                                         return -EPIPE;
1182                 }
1183         }
1184         return 0;
1185 }
1186
1187 static int fimc_cap_streamon(struct file *file, void *priv,
1188                              enum v4l2_buf_type type)
1189 {
1190         struct fimc_dev *fimc = video_drvdata(file);
1191         struct fimc_pipeline *p = &fimc->pipeline;
1192         struct fimc_vid_cap *vc = &fimc->vid_cap;
1193         struct media_entity *entity = &vc->ve.vdev.entity;
1194         struct fimc_source_info *si = NULL;
1195         struct v4l2_subdev *sd;
1196         int ret;
1197
1198         if (fimc_capture_active(fimc))
1199                 return -EBUSY;
1200
1201         ret = media_entity_pipeline_start(entity, p->m_pipeline);
1202         if (ret < 0)
1203                 return ret;
1204
1205         sd = p->subdevs[IDX_SENSOR];
1206         if (sd)
1207                 si = v4l2_get_subdev_hostdata(sd);
1208
1209         if (si == NULL) {
1210                 ret = -EPIPE;
1211                 goto err_p_stop;
1212         }
1213         /*
1214          * Save configuration data related to currently attached image
1215          * sensor or other data source, e.g. FIMC-IS.
1216          */
1217         vc->source_config = *si;
1218
1219         if (vc->input == GRP_ID_FIMC_IS)
1220                 vc->source_config.fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
1221
1222         if (vc->user_subdev_api) {
1223                 ret = fimc_pipeline_validate(fimc);
1224                 if (ret < 0)
1225                         goto err_p_stop;
1226         }
1227
1228         ret = vb2_ioctl_streamon(file, priv, type);
1229         if (!ret) {
1230                 vc->streaming = true;
1231                 return ret;
1232         }
1233
1234 err_p_stop:
1235         media_entity_pipeline_stop(entity);
1236         return ret;
1237 }
1238
1239 static int fimc_cap_streamoff(struct file *file, void *priv,
1240                             enum v4l2_buf_type type)
1241 {
1242         struct fimc_dev *fimc = video_drvdata(file);
1243         struct fimc_vid_cap *vc = &fimc->vid_cap;
1244         int ret;
1245
1246         ret = vb2_ioctl_streamoff(file, priv, type);
1247         if (ret < 0)
1248                 return ret;
1249
1250         media_entity_pipeline_stop(&vc->ve.vdev.entity);
1251         vc->streaming = false;
1252         return 0;
1253 }
1254
1255 static int fimc_cap_reqbufs(struct file *file, void *priv,
1256                             struct v4l2_requestbuffers *reqbufs)
1257 {
1258         struct fimc_dev *fimc = video_drvdata(file);
1259         int ret;
1260
1261         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
1262
1263         if (!ret)
1264                 fimc->vid_cap.reqbufs_count = reqbufs->count;
1265
1266         return ret;
1267 }
1268
1269 static int fimc_cap_g_selection(struct file *file, void *fh,
1270                                 struct v4l2_selection *s)
1271 {
1272         struct fimc_dev *fimc = video_drvdata(file);
1273         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1274         struct fimc_frame *f = &ctx->s_frame;
1275
1276         if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1277                 return -EINVAL;
1278
1279         switch (s->target) {
1280         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1281         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1282                 f = &ctx->d_frame;
1283         case V4L2_SEL_TGT_CROP_BOUNDS:
1284         case V4L2_SEL_TGT_CROP_DEFAULT:
1285                 s->r.left = 0;
1286                 s->r.top = 0;
1287                 s->r.width = f->o_width;
1288                 s->r.height = f->o_height;
1289                 return 0;
1290
1291         case V4L2_SEL_TGT_COMPOSE:
1292                 f = &ctx->d_frame;
1293         case V4L2_SEL_TGT_CROP:
1294                 s->r.left = f->offs_h;
1295                 s->r.top = f->offs_v;
1296                 s->r.width = f->width;
1297                 s->r.height = f->height;
1298                 return 0;
1299         }
1300
1301         return -EINVAL;
1302 }
1303
1304 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
1305 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
1306 {
1307         if (a->left < b->left || a->top < b->top)
1308                 return 0;
1309         if (a->left + a->width > b->left + b->width)
1310                 return 0;
1311         if (a->top + a->height > b->top + b->height)
1312                 return 0;
1313
1314         return 1;
1315 }
1316
1317 static int fimc_cap_s_selection(struct file *file, void *fh,
1318                                 struct v4l2_selection *s)
1319 {
1320         struct fimc_dev *fimc = video_drvdata(file);
1321         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1322         struct v4l2_rect rect = s->r;
1323         struct fimc_frame *f;
1324         unsigned long flags;
1325
1326         if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1327                 return -EINVAL;
1328
1329         if (s->target == V4L2_SEL_TGT_COMPOSE)
1330                 f = &ctx->d_frame;
1331         else if (s->target == V4L2_SEL_TGT_CROP)
1332                 f = &ctx->s_frame;
1333         else
1334                 return -EINVAL;
1335
1336         fimc_capture_try_selection(ctx, &rect, s->target);
1337
1338         if (s->flags & V4L2_SEL_FLAG_LE &&
1339             !enclosed_rectangle(&rect, &s->r))
1340                 return -ERANGE;
1341
1342         if (s->flags & V4L2_SEL_FLAG_GE &&
1343             !enclosed_rectangle(&s->r, &rect))
1344                 return -ERANGE;
1345
1346         s->r = rect;
1347         spin_lock_irqsave(&fimc->slock, flags);
1348         set_frame_crop(f, s->r.left, s->r.top, s->r.width,
1349                        s->r.height);
1350         spin_unlock_irqrestore(&fimc->slock, flags);
1351
1352         set_bit(ST_CAPT_APPLY_CFG, &fimc->state);
1353         return 0;
1354 }
1355
1356 static const struct v4l2_ioctl_ops fimc_capture_ioctl_ops = {
1357         .vidioc_querycap                = fimc_cap_querycap,
1358
1359         .vidioc_enum_fmt_vid_cap_mplane = fimc_cap_enum_fmt_mplane,
1360         .vidioc_try_fmt_vid_cap_mplane  = fimc_cap_try_fmt_mplane,
1361         .vidioc_s_fmt_vid_cap_mplane    = fimc_cap_s_fmt_mplane,
1362         .vidioc_g_fmt_vid_cap_mplane    = fimc_cap_g_fmt_mplane,
1363
1364         .vidioc_reqbufs                 = fimc_cap_reqbufs,
1365         .vidioc_querybuf                = vb2_ioctl_querybuf,
1366         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1367         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1368         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1369         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1370         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1371
1372         .vidioc_streamon                = fimc_cap_streamon,
1373         .vidioc_streamoff               = fimc_cap_streamoff,
1374
1375         .vidioc_g_selection             = fimc_cap_g_selection,
1376         .vidioc_s_selection             = fimc_cap_s_selection,
1377
1378         .vidioc_enum_input              = fimc_cap_enum_input,
1379         .vidioc_s_input                 = fimc_cap_s_input,
1380         .vidioc_g_input                 = fimc_cap_g_input,
1381 };
1382
1383 /* Capture subdev media entity operations */
1384 static int fimc_link_setup(struct media_entity *entity,
1385                            const struct media_pad *local,
1386                            const struct media_pad *remote, u32 flags)
1387 {
1388         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1389         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1390         struct fimc_vid_cap *vc = &fimc->vid_cap;
1391         struct v4l2_subdev *sensor;
1392
1393         if (media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
1394                 return -EINVAL;
1395
1396         if (WARN_ON(fimc == NULL))
1397                 return 0;
1398
1399         dbg("%s --> %s, flags: 0x%x. input: 0x%x",
1400             local->entity->name, remote->entity->name, flags,
1401             fimc->vid_cap.input);
1402
1403         if (!(flags & MEDIA_LNK_FL_ENABLED)) {
1404                 fimc->vid_cap.input = 0;
1405                 return 0;
1406         }
1407
1408         if (vc->input != 0)
1409                 return -EBUSY;
1410
1411         vc->input = sd->grp_id;
1412
1413         if (vc->user_subdev_api || vc->inh_sensor_ctrls)
1414                 return 0;
1415
1416         /* Inherit V4L2 controls from the image sensor subdev. */
1417         sensor = fimc_find_remote_sensor(&vc->subdev.entity);
1418         if (sensor == NULL)
1419                 return 0;
1420
1421         return v4l2_ctrl_add_handler(&vc->ctx->ctrls.handler,
1422                                      sensor->ctrl_handler, NULL);
1423 }
1424
1425 static const struct media_entity_operations fimc_sd_media_ops = {
1426         .link_setup = fimc_link_setup,
1427 };
1428
1429 /**
1430  * fimc_sensor_notify - v4l2_device notification from a sensor subdev
1431  * @sd: pointer to a subdev generating the notification
1432  * @notification: the notification type, must be S5P_FIMC_TX_END_NOTIFY
1433  * @arg: pointer to an u32 type integer that stores the frame payload value
1434  *
1435  * The End Of Frame notification sent by sensor subdev in its still capture
1436  * mode. If there is only a single VSYNC generated by the sensor at the
1437  * beginning of a frame transmission, FIMC does not issue the LastIrq
1438  * (end of frame) interrupt. And this notification is used to complete the
1439  * frame capture and returning a buffer to user-space. Subdev drivers should
1440  * call this notification from their last 'End of frame capture' interrupt.
1441  */
1442 void fimc_sensor_notify(struct v4l2_subdev *sd, unsigned int notification,
1443                         void *arg)
1444 {
1445         struct fimc_source_info *si;
1446         struct fimc_vid_buffer *buf;
1447         struct fimc_md *fmd;
1448         struct fimc_dev *fimc;
1449         unsigned long flags;
1450
1451         if (sd == NULL)
1452                 return;
1453
1454         si = v4l2_get_subdev_hostdata(sd);
1455         fmd = entity_to_fimc_mdev(&sd->entity);
1456
1457         spin_lock_irqsave(&fmd->slock, flags);
1458
1459         fimc = si ? source_to_sensor_info(si)->host : NULL;
1460
1461         if (fimc && arg && notification == S5P_FIMC_TX_END_NOTIFY &&
1462             test_bit(ST_CAPT_PEND, &fimc->state)) {
1463                 unsigned long irq_flags;
1464                 spin_lock_irqsave(&fimc->slock, irq_flags);
1465                 if (!list_empty(&fimc->vid_cap.active_buf_q)) {
1466                         buf = list_entry(fimc->vid_cap.active_buf_q.next,
1467                                          struct fimc_vid_buffer, list);
1468                         vb2_set_plane_payload(&buf->vb, 0, *((u32 *)arg));
1469                 }
1470                 fimc_capture_irq_handler(fimc, 1);
1471                 fimc_deactivate_capture(fimc);
1472                 spin_unlock_irqrestore(&fimc->slock, irq_flags);
1473         }
1474         spin_unlock_irqrestore(&fmd->slock, flags);
1475 }
1476
1477 static int fimc_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1478                                       struct v4l2_subdev_fh *fh,
1479                                       struct v4l2_subdev_mbus_code_enum *code)
1480 {
1481         struct fimc_fmt *fmt;
1482
1483         fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM, code->index);
1484         if (!fmt)
1485                 return -EINVAL;
1486         code->code = fmt->mbus_code;
1487         return 0;
1488 }
1489
1490 static int fimc_subdev_get_fmt(struct v4l2_subdev *sd,
1491                                struct v4l2_subdev_fh *fh,
1492                                struct v4l2_subdev_format *fmt)
1493 {
1494         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1495         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1496         struct fimc_frame *ff = &ctx->s_frame;
1497         struct v4l2_mbus_framefmt *mf;
1498
1499         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1500                 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1501                 fmt->format = *mf;
1502                 return 0;
1503         }
1504
1505         mf = &fmt->format;
1506         mutex_lock(&fimc->lock);
1507
1508         switch (fmt->pad) {
1509         case FIMC_SD_PAD_SOURCE:
1510                 if (!WARN_ON(ff->fmt == NULL))
1511                         mf->code = ff->fmt->mbus_code;
1512                 /* Sink pads crop rectangle size */
1513                 mf->width = ff->width;
1514                 mf->height = ff->height;
1515                 break;
1516         case FIMC_SD_PAD_SINK_FIFO:
1517                 *mf = fimc->vid_cap.wb_fmt;
1518                 break;
1519         case FIMC_SD_PAD_SINK_CAM:
1520         default:
1521                 *mf = fimc->vid_cap.ci_fmt;
1522                 break;
1523         }
1524
1525         mutex_unlock(&fimc->lock);
1526         mf->colorspace = V4L2_COLORSPACE_JPEG;
1527
1528         return 0;
1529 }
1530
1531 static int fimc_subdev_set_fmt(struct v4l2_subdev *sd,
1532                                struct v4l2_subdev_fh *fh,
1533                                struct v4l2_subdev_format *fmt)
1534 {
1535         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1536         struct v4l2_mbus_framefmt *mf = &fmt->format;
1537         struct fimc_vid_cap *vc = &fimc->vid_cap;
1538         struct fimc_ctx *ctx = vc->ctx;
1539         struct fimc_frame *ff;
1540         struct fimc_fmt *ffmt;
1541
1542         dbg("pad%d: code: 0x%x, %dx%d",
1543             fmt->pad, mf->code, mf->width, mf->height);
1544
1545         if (fmt->pad == FIMC_SD_PAD_SOURCE && vb2_is_busy(&vc->vbq))
1546                 return -EBUSY;
1547
1548         mutex_lock(&fimc->lock);
1549         ffmt = fimc_capture_try_format(ctx, &mf->width, &mf->height,
1550                                        &mf->code, NULL, fmt->pad);
1551         mutex_unlock(&fimc->lock);
1552         mf->colorspace = V4L2_COLORSPACE_JPEG;
1553
1554         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1555                 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1556                 *mf = fmt->format;
1557                 return 0;
1558         }
1559         /* There must be a bug in the driver if this happens */
1560         if (WARN_ON(ffmt == NULL))
1561                 return -EINVAL;
1562
1563         /* Update RGB Alpha control state and value range */
1564         fimc_alpha_ctrl_update(ctx);
1565
1566         fimc_capture_mark_jpeg_xfer(ctx, ffmt->color);
1567         if (fmt->pad == FIMC_SD_PAD_SOURCE) {
1568                 ff = &ctx->d_frame;
1569                 /* Sink pads crop rectangle size */
1570                 mf->width = ctx->s_frame.width;
1571                 mf->height = ctx->s_frame.height;
1572         } else {
1573                 ff = &ctx->s_frame;
1574         }
1575
1576         mutex_lock(&fimc->lock);
1577         set_frame_bounds(ff, mf->width, mf->height);
1578
1579         if (fmt->pad == FIMC_SD_PAD_SINK_FIFO)
1580                 vc->wb_fmt = *mf;
1581         else if (fmt->pad == FIMC_SD_PAD_SINK_CAM)
1582                 vc->ci_fmt = *mf;
1583
1584         ff->fmt = ffmt;
1585
1586         /* Reset the crop rectangle if required. */
1587         if (!(fmt->pad == FIMC_SD_PAD_SOURCE && (ctx->state & FIMC_COMPOSE)))
1588                 set_frame_crop(ff, 0, 0, mf->width, mf->height);
1589
1590         if (fmt->pad != FIMC_SD_PAD_SOURCE)
1591                 ctx->state &= ~FIMC_COMPOSE;
1592
1593         mutex_unlock(&fimc->lock);
1594         return 0;
1595 }
1596
1597 static int fimc_subdev_get_selection(struct v4l2_subdev *sd,
1598                                      struct v4l2_subdev_fh *fh,
1599                                      struct v4l2_subdev_selection *sel)
1600 {
1601         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1602         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1603         struct fimc_frame *f = &ctx->s_frame;
1604         struct v4l2_rect *r = &sel->r;
1605         struct v4l2_rect *try_sel;
1606
1607         if (sel->pad == FIMC_SD_PAD_SOURCE)
1608                 return -EINVAL;
1609
1610         mutex_lock(&fimc->lock);
1611
1612         switch (sel->target) {
1613         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1614                 f = &ctx->d_frame;
1615         case V4L2_SEL_TGT_CROP_BOUNDS:
1616                 r->width = f->o_width;
1617                 r->height = f->o_height;
1618                 r->left = 0;
1619                 r->top = 0;
1620                 mutex_unlock(&fimc->lock);
1621                 return 0;
1622
1623         case V4L2_SEL_TGT_CROP:
1624                 try_sel = v4l2_subdev_get_try_crop(fh, sel->pad);
1625                 break;
1626         case V4L2_SEL_TGT_COMPOSE:
1627                 try_sel = v4l2_subdev_get_try_compose(fh, sel->pad);
1628                 f = &ctx->d_frame;
1629                 break;
1630         default:
1631                 mutex_unlock(&fimc->lock);
1632                 return -EINVAL;
1633         }
1634
1635         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1636                 sel->r = *try_sel;
1637         } else {
1638                 r->left = f->offs_h;
1639                 r->top = f->offs_v;
1640                 r->width = f->width;
1641                 r->height = f->height;
1642         }
1643
1644         dbg("target %#x: l:%d, t:%d, %dx%d, f_w: %d, f_h: %d",
1645             sel->pad, r->left, r->top, r->width, r->height,
1646             f->f_width, f->f_height);
1647
1648         mutex_unlock(&fimc->lock);
1649         return 0;
1650 }
1651
1652 static int fimc_subdev_set_selection(struct v4l2_subdev *sd,
1653                                      struct v4l2_subdev_fh *fh,
1654                                      struct v4l2_subdev_selection *sel)
1655 {
1656         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1657         struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1658         struct fimc_frame *f = &ctx->s_frame;
1659         struct v4l2_rect *r = &sel->r;
1660         struct v4l2_rect *try_sel;
1661         unsigned long flags;
1662
1663         if (sel->pad == FIMC_SD_PAD_SOURCE)
1664                 return -EINVAL;
1665
1666         mutex_lock(&fimc->lock);
1667         fimc_capture_try_selection(ctx, r, V4L2_SEL_TGT_CROP);
1668
1669         switch (sel->target) {
1670         case V4L2_SEL_TGT_CROP:
1671                 try_sel = v4l2_subdev_get_try_crop(fh, sel->pad);
1672                 break;
1673         case V4L2_SEL_TGT_COMPOSE:
1674                 try_sel = v4l2_subdev_get_try_compose(fh, sel->pad);
1675                 f = &ctx->d_frame;
1676                 break;
1677         default:
1678                 mutex_unlock(&fimc->lock);
1679                 return -EINVAL;
1680         }
1681
1682         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1683                 *try_sel = sel->r;
1684         } else {
1685                 spin_lock_irqsave(&fimc->slock, flags);
1686                 set_frame_crop(f, r->left, r->top, r->width, r->height);
1687                 set_bit(ST_CAPT_APPLY_CFG, &fimc->state);
1688                 if (sel->target == V4L2_SEL_TGT_COMPOSE)
1689                         ctx->state |= FIMC_COMPOSE;
1690                 spin_unlock_irqrestore(&fimc->slock, flags);
1691         }
1692
1693         dbg("target %#x: (%d,%d)/%dx%d", sel->target, r->left, r->top,
1694             r->width, r->height);
1695
1696         mutex_unlock(&fimc->lock);
1697         return 0;
1698 }
1699
1700 static struct v4l2_subdev_pad_ops fimc_subdev_pad_ops = {
1701         .enum_mbus_code = fimc_subdev_enum_mbus_code,
1702         .get_selection = fimc_subdev_get_selection,
1703         .set_selection = fimc_subdev_set_selection,
1704         .get_fmt = fimc_subdev_get_fmt,
1705         .set_fmt = fimc_subdev_set_fmt,
1706 };
1707
1708 static struct v4l2_subdev_ops fimc_subdev_ops = {
1709         .pad = &fimc_subdev_pad_ops,
1710 };
1711
1712 /* Set default format at the sensor and host interface */
1713 static int fimc_capture_set_default_format(struct fimc_dev *fimc)
1714 {
1715         struct v4l2_format fmt = {
1716                 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
1717                 .fmt.pix_mp = {
1718                         .width          = 640,
1719                         .height         = 480,
1720                         .pixelformat    = V4L2_PIX_FMT_YUYV,
1721                         .field          = V4L2_FIELD_NONE,
1722                         .colorspace     = V4L2_COLORSPACE_JPEG,
1723                 },
1724         };
1725
1726         return __fimc_capture_set_format(fimc, &fmt);
1727 }
1728
1729 /* fimc->lock must be already initialized */
1730 static int fimc_register_capture_device(struct fimc_dev *fimc,
1731                                  struct v4l2_device *v4l2_dev)
1732 {
1733         struct video_device *vfd = &fimc->vid_cap.ve.vdev;
1734         struct vb2_queue *q = &fimc->vid_cap.vbq;
1735         struct fimc_ctx *ctx;
1736         struct fimc_vid_cap *vid_cap;
1737         int ret = -ENOMEM;
1738
1739         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1740         if (!ctx)
1741                 return -ENOMEM;
1742
1743         ctx->fimc_dev    = fimc;
1744         ctx->in_path     = FIMC_IO_CAMERA;
1745         ctx->out_path    = FIMC_IO_DMA;
1746         ctx->state       = FIMC_CTX_CAP;
1747         ctx->s_frame.fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM, 0);
1748         ctx->d_frame.fmt = ctx->s_frame.fmt;
1749
1750         memset(vfd, 0, sizeof(*vfd));
1751         snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.capture", fimc->id);
1752
1753         vfd->fops       = &fimc_capture_fops;
1754         vfd->ioctl_ops  = &fimc_capture_ioctl_ops;
1755         vfd->v4l2_dev   = v4l2_dev;
1756         vfd->minor      = -1;
1757         vfd->release    = video_device_release_empty;
1758         vfd->queue      = q;
1759         vfd->lock       = &fimc->lock;
1760
1761         video_set_drvdata(vfd, fimc);
1762         vid_cap = &fimc->vid_cap;
1763         vid_cap->active_buf_cnt = 0;
1764         vid_cap->reqbufs_count = 0;
1765         vid_cap->ctx = ctx;
1766
1767         INIT_LIST_HEAD(&vid_cap->pending_buf_q);
1768         INIT_LIST_HEAD(&vid_cap->active_buf_q);
1769
1770         memset(q, 0, sizeof(*q));
1771         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1772         q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1773         q->drv_priv = ctx;
1774         q->ops = &fimc_capture_qops;
1775         q->mem_ops = &vb2_dma_contig_memops;
1776         q->buf_struct_size = sizeof(struct fimc_vid_buffer);
1777         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1778         q->lock = &fimc->lock;
1779
1780         ret = vb2_queue_init(q);
1781         if (ret)
1782                 goto err_free_ctx;
1783
1784         vid_cap->vd_pad.flags = MEDIA_PAD_FL_SINK;
1785         ret = media_entity_init(&vfd->entity, 1, &vid_cap->vd_pad, 0);
1786         if (ret)
1787                 goto err_free_ctx;
1788
1789         ret = fimc_ctrls_create(ctx);
1790         if (ret)
1791                 goto err_me_cleanup;
1792
1793         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1794         if (ret)
1795                 goto err_ctrl_free;
1796
1797         v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
1798                   vfd->name, video_device_node_name(vfd));
1799
1800         vfd->ctrl_handler = &ctx->ctrls.handler;
1801         return 0;
1802
1803 err_ctrl_free:
1804         fimc_ctrls_delete(ctx);
1805 err_me_cleanup:
1806         media_entity_cleanup(&vfd->entity);
1807 err_free_ctx:
1808         kfree(ctx);
1809         return ret;
1810 }
1811
1812 static int fimc_capture_subdev_registered(struct v4l2_subdev *sd)
1813 {
1814         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1815         int ret;
1816
1817         if (fimc == NULL)
1818                 return -ENXIO;
1819
1820         ret = fimc_register_m2m_device(fimc, sd->v4l2_dev);
1821         if (ret)
1822                 return ret;
1823
1824         fimc->pipeline_ops = v4l2_get_subdev_hostdata(sd);
1825
1826         ret = fimc_register_capture_device(fimc, sd->v4l2_dev);
1827         if (ret) {
1828                 fimc_unregister_m2m_device(fimc);
1829                 fimc->pipeline_ops = NULL;
1830         }
1831
1832         return ret;
1833 }
1834
1835 static void fimc_capture_subdev_unregistered(struct v4l2_subdev *sd)
1836 {
1837         struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1838         struct video_device *vdev;
1839
1840         if (fimc == NULL)
1841                 return;
1842
1843         fimc_unregister_m2m_device(fimc);
1844         vdev = &fimc->vid_cap.ve.vdev;
1845
1846         if (video_is_registered(vdev)) {
1847                 video_unregister_device(vdev);
1848                 media_entity_cleanup(&vdev->entity);
1849                 fimc_ctrls_delete(fimc->vid_cap.ctx);
1850                 fimc->pipeline_ops = NULL;
1851         }
1852         kfree(fimc->vid_cap.ctx);
1853         fimc->vid_cap.ctx = NULL;
1854 }
1855
1856 static const struct v4l2_subdev_internal_ops fimc_capture_sd_internal_ops = {
1857         .registered = fimc_capture_subdev_registered,
1858         .unregistered = fimc_capture_subdev_unregistered,
1859 };
1860
1861 int fimc_initialize_capture_subdev(struct fimc_dev *fimc)
1862 {
1863         struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
1864         int ret;
1865
1866         v4l2_subdev_init(sd, &fimc_subdev_ops);
1867         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1868         snprintf(sd->name, sizeof(sd->name), "FIMC.%d", fimc->id);
1869
1870         fimc->vid_cap.sd_pads[FIMC_SD_PAD_SINK_CAM].flags = MEDIA_PAD_FL_SINK;
1871         fimc->vid_cap.sd_pads[FIMC_SD_PAD_SINK_FIFO].flags = MEDIA_PAD_FL_SINK;
1872         fimc->vid_cap.sd_pads[FIMC_SD_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1873         ret = media_entity_init(&sd->entity, FIMC_SD_PADS_NUM,
1874                                 fimc->vid_cap.sd_pads, 0);
1875         if (ret)
1876                 return ret;
1877
1878         sd->entity.ops = &fimc_sd_media_ops;
1879         sd->internal_ops = &fimc_capture_sd_internal_ops;
1880         v4l2_set_subdevdata(sd, fimc);
1881         return 0;
1882 }
1883
1884 void fimc_unregister_capture_subdev(struct fimc_dev *fimc)
1885 {
1886         struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
1887
1888         v4l2_device_unregister_subdev(sd);
1889         media_entity_cleanup(&sd->entity);
1890         v4l2_set_subdevdata(sd, NULL);
1891 }