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

   1 /*
   2  * Samsung EXYNOS FIMC-LITE (camera host interface) driver
   3 *
   4  * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
   5  * Author: 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 #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/interrupt.h>
  18 #include <linux/kernel.h>
  19 #include <linux/list.h>
  20 #include <linux/module.h>
  21 #include <linux/of.h>
  22 #include <linux/types.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/slab.h>
  26 #include <linux/videodev2.h>
  27
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-ioctl.h>
  30 #include <media/v4l2-mem2mem.h>
  31 #include <media/videobuf2-v4l2.h>
  32 #include <media/videobuf2-dma-contig.h>
  33 #include <media/exynos-fimc.h>
  34
  35 #include "common.h"
  36 #include "fimc-core.h"
  37 #include "fimc-lite.h"
  38 #include "fimc-lite-reg.h"
  39
  40 static int debug;
  41 module_param(debug, int, 0644);
  42
  43 static const struct fimc_fmt fimc_lite_formats[] = {
  44         {
  45                 .name           = "YUV 4:2:2 packed, YCbYCr",
  46                 .fourcc         = V4L2_PIX_FMT_YUYV,
  47                 .colorspace     = V4L2_COLORSPACE_JPEG,
  48                 .depth          = { 16 },
  49                 .color          = FIMC_FMT_YCBYCR422,
  50                 .memplanes      = 1,
  51                 .mbus_code      = MEDIA_BUS_FMT_YUYV8_2X8,
  52                 .flags          = FMT_FLAGS_YUV,
  53         }, {
  54                 .name           = "YUV 4:2:2 packed, CbYCrY",
  55                 .fourcc         = V4L2_PIX_FMT_UYVY,
  56                 .colorspace     = V4L2_COLORSPACE_JPEG,
  57                 .depth          = { 16 },
  58                 .color          = FIMC_FMT_CBYCRY422,
  59                 .memplanes      = 1,
  60                 .mbus_code      = MEDIA_BUS_FMT_UYVY8_2X8,
  61                 .flags          = FMT_FLAGS_YUV,
  62         }, {
  63                 .name           = "YUV 4:2:2 packed, CrYCbY",
  64                 .fourcc         = V4L2_PIX_FMT_VYUY,
  65                 .colorspace     = V4L2_COLORSPACE_JPEG,
  66                 .depth          = { 16 },
  67                 .color          = FIMC_FMT_CRYCBY422,
  68                 .memplanes      = 1,
  69                 .mbus_code      = MEDIA_BUS_FMT_VYUY8_2X8,
  70                 .flags          = FMT_FLAGS_YUV,
  71         }, {
  72                 .name           = "YUV 4:2:2 packed, YCrYCb",
  73                 .fourcc         = V4L2_PIX_FMT_YVYU,
  74                 .colorspace     = V4L2_COLORSPACE_JPEG,
  75                 .depth          = { 16 },
  76                 .color          = FIMC_FMT_YCRYCB422,
  77                 .memplanes      = 1,
  78                 .mbus_code      = MEDIA_BUS_FMT_YVYU8_2X8,
  79                 .flags          = FMT_FLAGS_YUV,
  80         }, {
  81                 .name           = "RAW8 (GRBG)",
  82                 .fourcc         = V4L2_PIX_FMT_SGRBG8,
  83                 .colorspace     = V4L2_COLORSPACE_SRGB,
  84                 .depth          = { 8 },
  85                 .color          = FIMC_FMT_RAW8,
  86                 .memplanes      = 1,
  87                 .mbus_code      = MEDIA_BUS_FMT_SGRBG8_1X8,
  88                 .flags          = FMT_FLAGS_RAW_BAYER,
  89         }, {
  90                 .name           = "RAW10 (GRBG)",
  91                 .fourcc         = V4L2_PIX_FMT_SGRBG10,
  92                 .colorspace     = V4L2_COLORSPACE_SRGB,
  93                 .depth          = { 16 },
  94                 .color          = FIMC_FMT_RAW10,
  95                 .memplanes      = 1,
  96                 .mbus_code      = MEDIA_BUS_FMT_SGRBG10_1X10,
  97                 .flags          = FMT_FLAGS_RAW_BAYER,
  98         }, {
  99                 .name           = "RAW12 (GRBG)",
 100                 .fourcc         = V4L2_PIX_FMT_SGRBG12,
 101                 .colorspace     = V4L2_COLORSPACE_SRGB,
 102                 .depth          = { 16 },
 103                 .color          = FIMC_FMT_RAW12,
 104                 .memplanes      = 1,
 105                 .mbus_code      = MEDIA_BUS_FMT_SGRBG12_1X12,
 106                 .flags          = FMT_FLAGS_RAW_BAYER,
 107         },
 108 };
 109
 110 /**
 111  * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
 112  * @pixelformat: fourcc to match, ignored if null
 113  * @mbus_code: media bus code to match, ignored if null
 114  * @mask: the color format flags to match
 115  * @index: index to the fimc_lite_formats array, ignored if negative
 116  */
 117 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
 118                         const u32 *mbus_code, unsigned int mask, int index)
 119 {
 120         const struct fimc_fmt *fmt, *def_fmt = NULL;
 121         unsigned int i;
 122         int id = 0;
 123
 124         if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
 125                 return NULL;
 126
 127         for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
 128                 fmt = &fimc_lite_formats[i];
 129                 if (mask && !(fmt->flags & mask))
 130                         continue;
 131                 if (pixelformat && fmt->fourcc == *pixelformat)
 132                         return fmt;
 133                 if (mbus_code && fmt->mbus_code == *mbus_code)
 134                         return fmt;
 135                 if (index == id)
 136                         def_fmt = fmt;
 137                 id++;
 138         }
 139         return def_fmt;
 140 }
 141
 142 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
 143 {
 144         struct fimc_source_info *si;
 145         unsigned long flags;
 146
 147         if (fimc->sensor == NULL)
 148                 return -ENXIO;
 149
 150         if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
 151                 return -EINVAL;
 152
 153         /* Get sensor configuration data from the sensor subdev */
 154         si = v4l2_get_subdev_hostdata(fimc->sensor);
 155         if (!si)
 156                 return -EINVAL;
 157
 158         spin_lock_irqsave(&fimc->slock, flags);
 159
 160         flite_hw_set_camera_bus(fimc, si);
 161         flite_hw_set_source_format(fimc, &fimc->inp_frame);
 162         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 163         flite_hw_set_dma_buf_mask(fimc, 0);
 164         flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
 165         flite_hw_set_interrupt_mask(fimc);
 166         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 167
 168         if (debug > 0)
 169                 flite_hw_dump_regs(fimc, __func__);
 170
 171         spin_unlock_irqrestore(&fimc->slock, flags);
 172         return 0;
 173 }
 174
 175 /*
 176  * Reinitialize the driver so it is ready to start the streaming again.
 177  * Set fimc->state to indicate stream off and the hardware shut down state.
 178  * If not suspending (@suspend is false), return any buffers to videobuf2.
 179  * Otherwise put any owned buffers onto the pending buffers queue, so they
 180  * can be re-spun when the device is being resumed. Also perform FIMC
 181  * software reset and disable streaming on the whole pipeline if required.
 182  */
 183 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
 184 {
 185         struct flite_buffer *buf;
 186         unsigned long flags;
 187         bool streaming;
 188
 189         spin_lock_irqsave(&fimc->slock, flags);
 190         streaming = fimc->state & (1 << ST_SENSOR_STREAM);
 191
 192         fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
 193                          1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
 194         if (suspend)
 195                 fimc->state |= (1 << ST_FLITE_SUSPENDED);
 196         else
 197                 fimc->state &= ~(1 << ST_FLITE_PENDING |
 198                                  1 << ST_FLITE_SUSPENDED);
 199
 200         /* Release unused buffers */
 201         while (!suspend && !list_empty(&fimc->pending_buf_q)) {
 202                 buf = fimc_lite_pending_queue_pop(fimc);
 203                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 204         }
 205         /* If suspending put unused buffers onto pending queue */
 206         while (!list_empty(&fimc->active_buf_q)) {
 207                 buf = fimc_lite_active_queue_pop(fimc);
 208                 if (suspend)
 209                         fimc_lite_pending_queue_add(fimc, buf);
 210                 else
 211                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 212         }
 213
 214         spin_unlock_irqrestore(&fimc->slock, flags);
 215
 216         flite_hw_reset(fimc);
 217
 218         if (!streaming)
 219                 return 0;
 220
 221         return fimc_pipeline_call(&fimc->ve, set_stream, 0);
 222 }
 223
 224 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
 225 {
 226         unsigned long flags;
 227
 228         if (!fimc_lite_active(fimc))
 229                 return 0;
 230
 231         spin_lock_irqsave(&fimc->slock, flags);
 232         set_bit(ST_FLITE_OFF, &fimc->state);
 233         flite_hw_capture_stop(fimc);
 234         spin_unlock_irqrestore(&fimc->slock, flags);
 235
 236         wait_event_timeout(fimc->irq_queue,
 237                            !test_bit(ST_FLITE_OFF, &fimc->state),
 238                            (2*HZ/10)); /* 200 ms */
 239
 240         return fimc_lite_reinit(fimc, suspend);
 241 }
 242
 243 /* Must be called  with fimc.slock spinlock held. */
 244 static void fimc_lite_config_update(struct fimc_lite *fimc)
 245 {
 246         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 247         flite_hw_set_dma_window(fimc, &fimc->out_frame);
 248         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 249         clear_bit(ST_FLITE_CONFIG, &fimc->state);
 250 }
 251
 252 static irqreturn_t flite_irq_handler(int irq, void *priv)
 253 {
 254         struct fimc_lite *fimc = priv;
 255         struct flite_buffer *vbuf;
 256         unsigned long flags;
 257         u32 intsrc;
 258
 259         spin_lock_irqsave(&fimc->slock, flags);
 260
 261         intsrc = flite_hw_get_interrupt_source(fimc);
 262         flite_hw_clear_pending_irq(fimc);
 263
 264         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
 265                 wake_up(&fimc->irq_queue);
 266                 goto done;
 267         }
 268
 269         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
 270                 clear_bit(ST_FLITE_RUN, &fimc->state);
 271                 fimc->events.data_overflow++;
 272         }
 273
 274         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
 275                 flite_hw_clear_last_capture_end(fimc);
 276                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 277                 wake_up(&fimc->irq_queue);
 278         }
 279
 280         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 281                 goto done;
 282
 283         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
 284             test_bit(ST_FLITE_RUN, &fimc->state) &&
 285             !list_empty(&fimc->pending_buf_q)) {
 286                 vbuf = fimc_lite_pending_queue_pop(fimc);
 287                 flite_hw_set_dma_buffer(fimc, vbuf);
 288                 fimc_lite_active_queue_add(fimc, vbuf);
 289         }
 290
 291         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
 292             test_bit(ST_FLITE_RUN, &fimc->state) &&
 293             !list_empty(&fimc->active_buf_q)) {
 294                 vbuf = fimc_lite_active_queue_pop(fimc);
 295                 v4l2_get_timestamp(&vbuf->vb.timestamp);
 296                 vbuf->vb.sequence = fimc->frame_count++;
 297                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
 298                 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 299         }
 300
 301         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
 302                 fimc_lite_config_update(fimc);
 303
 304         if (list_empty(&fimc->pending_buf_q)) {
 305                 flite_hw_capture_stop(fimc);
 306                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 307         }
 308 done:
 309         set_bit(ST_FLITE_RUN, &fimc->state);
 310         spin_unlock_irqrestore(&fimc->slock, flags);
 311         return IRQ_HANDLED;
 312 }
 313
 314 static int start_streaming(struct vb2_queue *q, unsigned int count)
 315 {
 316         struct fimc_lite *fimc = q->drv_priv;
 317         unsigned long flags;
 318         int ret;
 319
 320         spin_lock_irqsave(&fimc->slock, flags);
 321
 322         fimc->buf_index = 0;
 323         fimc->frame_count = 0;
 324
 325         spin_unlock_irqrestore(&fimc->slock, flags);
 326
 327         ret = fimc_lite_hw_init(fimc, false);
 328         if (ret) {
 329                 fimc_lite_reinit(fimc, false);
 330                 return ret;
 331         }
 332
 333         set_bit(ST_FLITE_PENDING, &fimc->state);
 334
 335         if (!list_empty(&fimc->active_buf_q) &&
 336             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 337                 flite_hw_capture_start(fimc);
 338
 339                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 340                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 341         }
 342         if (debug > 0)
 343                 flite_hw_dump_regs(fimc, __func__);
 344
 345         return 0;
 346 }
 347
 348 static void stop_streaming(struct vb2_queue *q)
 349 {
 350         struct fimc_lite *fimc = q->drv_priv;
 351
 352         if (!fimc_lite_active(fimc))
 353                 return;
 354
 355         fimc_lite_stop_capture(fimc, false);
 356 }
 357
 358 static int queue_setup(struct vb2_queue *vq, const void *parg,
 359                        unsigned int *num_buffers, unsigned int *num_planes,
 360                        unsigned int sizes[], void *allocators[])
 361 {
 362         const struct v4l2_format *pfmt = parg;
 363         const struct v4l2_pix_format_mplane *pixm = NULL;
 364         struct fimc_lite *fimc = vq->drv_priv;
 365         struct flite_frame *frame = &fimc->out_frame;
 366         const struct fimc_fmt *fmt = frame->fmt;
 367         unsigned long wh;
 368         int i;
 369
 370         if (pfmt) {
 371                 pixm = &pfmt->fmt.pix_mp;
 372                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, 0, -1);
 373                 wh = pixm->width * pixm->height;
 374         } else {
 375                 wh = frame->f_width * frame->f_height;
 376         }
 377
 378         if (fmt == NULL)
 379                 return -EINVAL;
 380
 381         *num_planes = fmt->memplanes;
 382
 383         for (i = 0; i < fmt->memplanes; i++) {
 384                 unsigned int size = (wh * fmt->depth[i]) / 8;
 385                 if (pixm)
 386                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
 387                 else
 388                         sizes[i] = size;
 389                 allocators[i] = fimc->alloc_ctx;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int buffer_prepare(struct vb2_buffer *vb)
 396 {
 397         struct vb2_queue *vq = vb->vb2_queue;
 398         struct fimc_lite *fimc = vq->drv_priv;
 399         int i;
 400
 401         if (fimc->out_frame.fmt == NULL)
 402                 return -EINVAL;
 403
 404         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 405                 unsigned long size = fimc->payload[i];
 406
 407                 if (vb2_plane_size(vb, i) < size) {
 408                         v4l2_err(&fimc->ve.vdev,
 409                                  "User buffer too small (%ld < %ld)\n",
 410                                  vb2_plane_size(vb, i), size);
 411                         return -EINVAL;
 412                 }
 413                 vb2_set_plane_payload(vb, i, size);
 414         }
 415
 416         return 0;
 417 }
 418
 419 static void buffer_queue(struct vb2_buffer *vb)
 420 {
 421         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 422         struct flite_buffer *buf
 423                 = container_of(vbuf, struct flite_buffer, vb);
 424         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 425         unsigned long flags;
 426
 427         spin_lock_irqsave(&fimc->slock, flags);
 428         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
 429
 430         buf->index = fimc->buf_index++;
 431         if (fimc->buf_index >= fimc->reqbufs_count)
 432                 fimc->buf_index = 0;
 433
 434         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 435             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 436             list_empty(&fimc->active_buf_q)) {
 437                 flite_hw_set_dma_buffer(fimc, buf);
 438                 fimc_lite_active_queue_add(fimc, buf);
 439         } else {
 440                 fimc_lite_pending_queue_add(fimc, buf);
 441         }
 442
 443         if (vb2_is_streaming(&fimc->vb_queue) &&
 444             !list_empty(&fimc->pending_buf_q) &&
 445             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 446                 flite_hw_capture_start(fimc);
 447                 spin_unlock_irqrestore(&fimc->slock, flags);
 448
 449                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 450                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 451                 return;
 452         }
 453         spin_unlock_irqrestore(&fimc->slock, flags);
 454 }
 455
 456 static const struct vb2_ops fimc_lite_qops = {
 457         .queue_setup     = queue_setup,
 458         .buf_prepare     = buffer_prepare,
 459         .buf_queue       = buffer_queue,
 460         .wait_prepare    = vb2_ops_wait_prepare,
 461         .wait_finish     = vb2_ops_wait_finish,
 462         .start_streaming = start_streaming,
 463         .stop_streaming  = stop_streaming,
 464 };
 465
 466 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 467 {
 468         unsigned long flags;
 469
 470         spin_lock_irqsave(&fimc->slock, flags);
 471         memset(&fimc->events, 0, sizeof(fimc->events));
 472         spin_unlock_irqrestore(&fimc->slock, flags);
 473 }
 474
 475 static int fimc_lite_open(struct file *file)
 476 {
 477         struct fimc_lite *fimc = video_drvdata(file);
 478         struct media_entity *me = &fimc->ve.vdev.entity;
 479         int ret;
 480
 481         mutex_lock(&fimc->lock);
 482         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 483                 ret = -EBUSY;
 484                 goto unlock;
 485         }
 486
 487         set_bit(ST_FLITE_IN_USE, &fimc->state);
 488         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 489         if (ret < 0)
 490                 goto unlock;
 491
 492         ret = v4l2_fh_open(file);
 493         if (ret < 0)
 494                 goto err_pm;
 495
 496         if (!v4l2_fh_is_singular_file(file) ||
 497             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 498                 goto unlock;
 499
 500         mutex_lock(&me->parent->graph_mutex);
 501
 502         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 503
 504         /* Mark video pipeline ending at this video node as in use. */
 505         if (ret == 0)
 506                 me->use_count++;
 507
 508         mutex_unlock(&me->parent->graph_mutex);
 509
 510         if (!ret) {
 511                 fimc_lite_clear_event_counters(fimc);
 512                 goto unlock;
 513         }
 514
 515         v4l2_fh_release(file);
 516 err_pm:
 517         pm_runtime_put_sync(&fimc->pdev->dev);
 518         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 519 unlock:
 520         mutex_unlock(&fimc->lock);
 521         return ret;
 522 }
 523
 524 static int fimc_lite_release(struct file *file)
 525 {
 526         struct fimc_lite *fimc = video_drvdata(file);
 527         struct media_entity *entity = &fimc->ve.vdev.entity;
 528
 529         mutex_lock(&fimc->lock);
 530
 531         if (v4l2_fh_is_singular_file(file) &&
 532             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 533                 if (fimc->streaming) {
 534                         media_entity_pipeline_stop(entity);
 535                         fimc->streaming = false;
 536                 }
 537                 fimc_lite_stop_capture(fimc, false);
 538                 fimc_pipeline_call(&fimc->ve, close);
 539                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 540
 541                 mutex_lock(&entity->parent->graph_mutex);
 542                 entity->use_count--;
 543                 mutex_unlock(&entity->parent->graph_mutex);
 544         }
 545
 546         _vb2_fop_release(file, NULL);
 547         pm_runtime_put(&fimc->pdev->dev);
 548         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 549
 550         mutex_unlock(&fimc->lock);
 551         return 0;
 552 }
 553
 554 static const struct v4l2_file_operations fimc_lite_fops = {
 555         .owner          = THIS_MODULE,
 556         .open           = fimc_lite_open,
 557         .release        = fimc_lite_release,
 558         .poll           = vb2_fop_poll,
 559         .unlocked_ioctl = video_ioctl2,
 560         .mmap           = vb2_fop_mmap,
 561 };
 562
 563 /*
 564  * Format and crop negotiation helpers
 565  */
 566
 567 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 568                                         struct v4l2_subdev_pad_config *cfg,
 569                                         struct v4l2_subdev_format *format)
 570 {
 571         struct flite_drvdata *dd = fimc->dd;
 572         struct v4l2_mbus_framefmt *mf = &format->format;
 573         const struct fimc_fmt *fmt = NULL;
 574
 575         if (format->pad == FLITE_SD_PAD_SINK) {
 576                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 577                                 ffs(dd->out_width_align) - 1,
 578                                 &mf->height, 0, dd->max_height, 0, 0);
 579
 580                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 581                 if (WARN_ON(!fmt))
 582                         return NULL;
 583
 584                 mf->colorspace = fmt->colorspace;
 585                 mf->code = fmt->mbus_code;
 586         } else {
 587                 struct flite_frame *sink = &fimc->inp_frame;
 588                 struct v4l2_mbus_framefmt *sink_fmt;
 589                 struct v4l2_rect *rect;
 590
 591                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 592                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
 593                                                 FLITE_SD_PAD_SINK);
 594
 595                         mf->code = sink_fmt->code;
 596                         mf->colorspace = sink_fmt->colorspace;
 597
 598                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
 599                                                 FLITE_SD_PAD_SINK);
 600                 } else {
 601                         mf->code = sink->fmt->mbus_code;
 602                         mf->colorspace = sink->fmt->colorspace;
 603                         rect = &sink->rect;
 604                 }
 605
 606                 /* Allow changing format only on sink pad */
 607                 mf->width = rect->width;
 608                 mf->height = rect->height;
 609         }
 610
 611         mf->field = V4L2_FIELD_NONE;
 612
 613         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 614                  mf->code, mf->colorspace, mf->width, mf->height);
 615
 616         return fmt;
 617 }
 618
 619 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 620 {
 621         struct flite_frame *frame = &fimc->inp_frame;
 622
 623         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 624                               &r->height, 0, frame->f_height, 0, 0);
 625
 626         /* Adjust left/top if cropping rectangle got out of bounds */
 627         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 628         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 629         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 630
 631         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 632                  r->left, r->top, r->width, r->height,
 633                  frame->f_width, frame->f_height);
 634 }
 635
 636 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 637 {
 638         struct flite_frame *frame = &fimc->out_frame;
 639         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 640
 641         /* Scaling is not supported so we enforce compose rectangle size
 642            same as size of the sink crop rectangle. */
 643         r->width = crop_rect->width;
 644         r->height = crop_rect->height;
 645
 646         /* Adjust left/top if the composing rectangle got out of bounds */
 647         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 648         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 649         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 650
 651         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 652                  r->left, r->top, r->width, r->height,
 653                  frame->f_width, frame->f_height);
 654 }
 655
 656 /*
 657  * Video node ioctl operations
 658  */
 659 static int fimc_lite_querycap(struct file *file, void *priv,
 660                                         struct v4l2_capability *cap)
 661 {
 662         struct fimc_lite *fimc = video_drvdata(file);
 663
 664         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 665         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 666         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 667                                         dev_name(&fimc->pdev->dev));
 668
 669         cap->device_caps = V4L2_CAP_STREAMING;
 670         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 671         return 0;
 672 }
 673
 674 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
 675                                      struct v4l2_fmtdesc *f)
 676 {
 677         const struct fimc_fmt *fmt;
 678
 679         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 680                 return -EINVAL;
 681
 682         fmt = &fimc_lite_formats[f->index];
 683         strlcpy(f->description, fmt->name, sizeof(f->description));
 684         f->pixelformat = fmt->fourcc;
 685
 686         return 0;
 687 }
 688
 689 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 690                                   struct v4l2_format *f)
 691 {
 692         struct fimc_lite *fimc = video_drvdata(file);
 693         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 694         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 695         struct flite_frame *frame = &fimc->out_frame;
 696         const struct fimc_fmt *fmt = frame->fmt;
 697
 698         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 699         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 700
 701         pixm->num_planes = fmt->memplanes;
 702         pixm->pixelformat = fmt->fourcc;
 703         pixm->width = frame->f_width;
 704         pixm->height = frame->f_height;
 705         pixm->field = V4L2_FIELD_NONE;
 706         pixm->colorspace = fmt->colorspace;
 707         return 0;
 708 }
 709
 710 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 711                              struct v4l2_pix_format_mplane *pixm,
 712                              const struct fimc_fmt **ffmt)
 713 {
 714         u32 bpl = pixm->plane_fmt[0].bytesperline;
 715         struct flite_drvdata *dd = fimc->dd;
 716         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 717         const struct fimc_fmt *fmt;
 718
 719         if (WARN_ON(inp_fmt == NULL))
 720                 return -EINVAL;
 721         /*
 722          * We allow some flexibility only for YUV formats. In case of raw
 723          * raw Bayer the FIMC-LITE's output format must match its camera
 724          * interface input format.
 725          */
 726         if (inp_fmt->flags & FMT_FLAGS_YUV)
 727                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 728                                                 inp_fmt->flags, 0);
 729         else
 730                 fmt = inp_fmt;
 731
 732         if (WARN_ON(fmt == NULL))
 733                 return -EINVAL;
 734         if (ffmt)
 735                 *ffmt = fmt;
 736         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 737                               ffs(dd->out_width_align) - 1,
 738                               &pixm->height, 0, dd->max_height, 0, 0);
 739
 740         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 741                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 742                                                    fmt->depth[0]) / 8;
 743
 744         if (pixm->plane_fmt[0].sizeimage == 0)
 745                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 746                                                 fmt->depth[0]) / 8;
 747         pixm->num_planes = fmt->memplanes;
 748         pixm->pixelformat = fmt->fourcc;
 749         pixm->colorspace = fmt->colorspace;
 750         pixm->field = V4L2_FIELD_NONE;
 751         return 0;
 752 }
 753
 754 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 755                                     struct v4l2_format *f)
 756 {
 757         struct fimc_lite *fimc = video_drvdata(file);
 758         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 759 }
 760
 761 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 762                                   struct v4l2_format *f)
 763 {
 764         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 765         struct fimc_lite *fimc = video_drvdata(file);
 766         struct flite_frame *frame = &fimc->out_frame;
 767         const struct fimc_fmt *fmt = NULL;
 768         int ret;
 769
 770         if (vb2_is_busy(&fimc->vb_queue))
 771                 return -EBUSY;
 772
 773         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 774         if (ret < 0)
 775                 return ret;
 776
 777         frame->fmt = fmt;
 778         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 779                                pixm->plane_fmt[0].sizeimage);
 780         frame->f_width = pixm->width;
 781         frame->f_height = pixm->height;
 782
 783         return 0;
 784 }
 785
 786 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 787 {
 788         struct v4l2_subdev *sd = &fimc->subdev;
 789         struct v4l2_subdev_format sink_fmt, src_fmt;
 790         struct media_pad *pad;
 791         int ret;
 792
 793         while (1) {
 794                 /* Retrieve format at the sink pad */
 795                 pad = &sd->entity.pads[0];
 796                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 797                         break;
 798                 /* Don't call FIMC subdev operation to avoid nested locking */
 799                 if (sd == &fimc->subdev) {
 800                         struct flite_frame *ff = &fimc->out_frame;
 801                         sink_fmt.format.width = ff->f_width;
 802                         sink_fmt.format.height = ff->f_height;
 803                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 804                 } else {
 805                         sink_fmt.pad = pad->index;
 806                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 807                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 808                                                &sink_fmt);
 809                         if (ret < 0 && ret != -ENOIOCTLCMD)
 810                                 return -EPIPE;
 811                 }
 812                 /* Retrieve format at the source pad */
 813                 pad = media_entity_remote_pad(pad);
 814                 if (pad == NULL ||
 815                     media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 816                         break;
 817
 818                 sd = media_entity_to_v4l2_subdev(pad->entity);
 819                 src_fmt.pad = pad->index;
 820                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 821                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 822                 if (ret < 0 && ret != -ENOIOCTLCMD)
 823                         return -EPIPE;
 824
 825                 if (src_fmt.format.width != sink_fmt.format.width ||
 826                     src_fmt.format.height != sink_fmt.format.height ||
 827                     src_fmt.format.code != sink_fmt.format.code)
 828                         return -EPIPE;
 829         }
 830         return 0;
 831 }
 832
 833 static int fimc_lite_streamon(struct file *file, void *priv,
 834                               enum v4l2_buf_type type)
 835 {
 836         struct fimc_lite *fimc = video_drvdata(file);
 837         struct media_entity *entity = &fimc->ve.vdev.entity;
 838         int ret;
 839
 840         if (fimc_lite_active(fimc))
 841                 return -EBUSY;
 842
 843         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
 844         if (ret < 0)
 845                 return ret;
 846
 847         ret = fimc_pipeline_validate(fimc);
 848         if (ret < 0)
 849                 goto err_p_stop;
 850
 851         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 852
 853         ret = vb2_ioctl_streamon(file, priv, type);
 854         if (!ret) {
 855                 fimc->streaming = true;
 856                 return ret;
 857         }
 858
 859 err_p_stop:
 860         media_entity_pipeline_stop(entity);
 861         return 0;
 862 }
 863
 864 static int fimc_lite_streamoff(struct file *file, void *priv,
 865                                enum v4l2_buf_type type)
 866 {
 867         struct fimc_lite *fimc = video_drvdata(file);
 868         int ret;
 869
 870         ret = vb2_ioctl_streamoff(file, priv, type);
 871         if (ret < 0)
 872                 return ret;
 873
 874         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
 875         fimc->streaming = false;
 876         return 0;
 877 }
 878
 879 static int fimc_lite_reqbufs(struct file *file, void *priv,
 880                              struct v4l2_requestbuffers *reqbufs)
 881 {
 882         struct fimc_lite *fimc = video_drvdata(file);
 883         int ret;
 884
 885         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 886         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 887         if (!ret)
 888                 fimc->reqbufs_count = reqbufs->count;
 889
 890         return ret;
 891 }
 892
 893 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 894 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
 895 {
 896         if (a->left < b->left || a->top < b->top)
 897                 return 0;
 898         if (a->left + a->width > b->left + b->width)
 899                 return 0;
 900         if (a->top + a->height > b->top + b->height)
 901                 return 0;
 902
 903         return 1;
 904 }
 905
 906 static int fimc_lite_g_selection(struct file *file, void *fh,
 907                                  struct v4l2_selection *sel)
 908 {
 909         struct fimc_lite *fimc = video_drvdata(file);
 910         struct flite_frame *f = &fimc->out_frame;
 911
 912         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 913                 return -EINVAL;
 914
 915         switch (sel->target) {
 916         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 917         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 918                 sel->r.left = 0;
 919                 sel->r.top = 0;
 920                 sel->r.width = f->f_width;
 921                 sel->r.height = f->f_height;
 922                 return 0;
 923
 924         case V4L2_SEL_TGT_COMPOSE:
 925                 sel->r = f->rect;
 926                 return 0;
 927         }
 928
 929         return -EINVAL;
 930 }
 931
 932 static int fimc_lite_s_selection(struct file *file, void *fh,
 933                                  struct v4l2_selection *sel)
 934 {
 935         struct fimc_lite *fimc = video_drvdata(file);
 936         struct flite_frame *f = &fimc->out_frame;
 937         struct v4l2_rect rect = sel->r;
 938         unsigned long flags;
 939
 940         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
 941             sel->target != V4L2_SEL_TGT_COMPOSE)
 942                 return -EINVAL;
 943
 944         fimc_lite_try_compose(fimc, &rect);
 945
 946         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 947             !enclosed_rectangle(&rect, &sel->r))
 948                 return -ERANGE;
 949
 950         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 951             !enclosed_rectangle(&sel->r, &rect))
 952                 return -ERANGE;
 953
 954         sel->r = rect;
 955         spin_lock_irqsave(&fimc->slock, flags);
 956         f->rect = rect;
 957         set_bit(ST_FLITE_CONFIG, &fimc->state);
 958         spin_unlock_irqrestore(&fimc->slock, flags);
 959
 960         return 0;
 961 }
 962
 963 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 964         .vidioc_querycap                = fimc_lite_querycap,
 965         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
 966         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 967         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 968         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 969         .vidioc_g_selection             = fimc_lite_g_selection,
 970         .vidioc_s_selection             = fimc_lite_s_selection,
 971         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 972         .vidioc_querybuf                = vb2_ioctl_querybuf,
 973         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 974         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 975         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 976         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 977         .vidioc_streamon                = fimc_lite_streamon,
 978         .vidioc_streamoff               = fimc_lite_streamoff,
 979 };
 980
 981 /* Capture subdev media entity operations */
 982 static int fimc_lite_link_setup(struct media_entity *entity,
 983                                 const struct media_pad *local,
 984                                 const struct media_pad *remote, u32 flags)
 985 {
 986         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 987         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 988         unsigned int remote_ent_type = media_entity_type(remote->entity);
 989         int ret = 0;
 990
 991         if (WARN_ON(fimc == NULL))
 992                 return 0;
 993
 994         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 995                  __func__, remote->entity->name, local->entity->name,
 996                  flags, fimc->source_subdev_grp_id);
 997
 998         switch (local->index) {
 999         case FLITE_SD_PAD_SINK:
1000                 if (remote_ent_type != MEDIA_ENT_T_V4L2_SUBDEV) {
1001                         ret = -EINVAL;
1002                         break;
1003                 }
1004                 if (flags & MEDIA_LNK_FL_ENABLED) {
1005                         if (fimc->source_subdev_grp_id == 0)
1006                                 fimc->source_subdev_grp_id = sd->grp_id;
1007                         else
1008                                 ret = -EBUSY;
1009                 } else {
1010                         fimc->source_subdev_grp_id = 0;
1011                         fimc->sensor = NULL;
1012                 }
1013                 break;
1014
1015         case FLITE_SD_PAD_SOURCE_DMA:
1016                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1017                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1018                 else if (remote_ent_type == MEDIA_ENT_T_DEVNODE)
1019                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1020                 else
1021                         ret = -EINVAL;
1022                 break;
1023
1024         case FLITE_SD_PAD_SOURCE_ISP:
1025                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1026                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1027                 else if (remote_ent_type == MEDIA_ENT_T_V4L2_SUBDEV)
1028                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1029                 else
1030                         ret = -EINVAL;
1031                 break;
1032
1033         default:
1034                 v4l2_err(sd, "Invalid pad index\n");
1035                 ret = -EINVAL;
1036         }
1037         mb();
1038
1039         return ret;
1040 }
1041
1042 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1043         .link_setup = fimc_lite_link_setup,
1044 };
1045
1046 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1047                                            struct v4l2_subdev_pad_config *cfg,
1048                                            struct v4l2_subdev_mbus_code_enum *code)
1049 {
1050         const struct fimc_fmt *fmt;
1051
1052         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1053         if (!fmt)
1054                 return -EINVAL;
1055         code->code = fmt->mbus_code;
1056         return 0;
1057 }
1058
1059 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1060                 struct v4l2_subdev *sd,
1061                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1062 {
1063         if (pad != FLITE_SD_PAD_SINK)
1064                 pad = FLITE_SD_PAD_SOURCE_DMA;
1065
1066         return v4l2_subdev_get_try_format(sd, cfg, pad);
1067 }
1068
1069 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1070                                     struct v4l2_subdev_pad_config *cfg,
1071                                     struct v4l2_subdev_format *fmt)
1072 {
1073         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1074         struct v4l2_mbus_framefmt *mf = &fmt->format;
1075         struct flite_frame *f = &fimc->inp_frame;
1076
1077         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1078                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1079                 fmt->format = *mf;
1080                 return 0;
1081         }
1082
1083         mutex_lock(&fimc->lock);
1084         mf->colorspace = f->fmt->colorspace;
1085         mf->code = f->fmt->mbus_code;
1086
1087         if (fmt->pad == FLITE_SD_PAD_SINK) {
1088                 /* full camera input frame size */
1089                 mf->width = f->f_width;
1090                 mf->height = f->f_height;
1091         } else {
1092                 /* crop size */
1093                 mf->width = f->rect.width;
1094                 mf->height = f->rect.height;
1095         }
1096         mutex_unlock(&fimc->lock);
1097         return 0;
1098 }
1099
1100 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1101                                     struct v4l2_subdev_pad_config *cfg,
1102                                     struct v4l2_subdev_format *fmt)
1103 {
1104         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1105         struct v4l2_mbus_framefmt *mf = &fmt->format;
1106         struct flite_frame *sink = &fimc->inp_frame;
1107         struct flite_frame *source = &fimc->out_frame;
1108         const struct fimc_fmt *ffmt;
1109
1110         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1111                  fmt->pad, mf->code, mf->width, mf->height);
1112
1113         mutex_lock(&fimc->lock);
1114
1115         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1116             sd->entity.stream_count > 0) ||
1117             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1118             vb2_is_busy(&fimc->vb_queue))) {
1119                 mutex_unlock(&fimc->lock);
1120                 return -EBUSY;
1121         }
1122
1123         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1124
1125         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1126                 struct v4l2_mbus_framefmt *src_fmt;
1127
1128                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1129                 *mf = fmt->format;
1130
1131                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1132                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1133                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1134                         *src_fmt = *mf;
1135                 }
1136
1137                 mutex_unlock(&fimc->lock);
1138                 return 0;
1139         }
1140
1141         if (fmt->pad == FLITE_SD_PAD_SINK) {
1142                 sink->f_width = mf->width;
1143                 sink->f_height = mf->height;
1144                 sink->fmt = ffmt;
1145                 /* Set sink crop rectangle */
1146                 sink->rect.width = mf->width;
1147                 sink->rect.height = mf->height;
1148                 sink->rect.left = 0;
1149                 sink->rect.top = 0;
1150                 /* Reset source format and crop rectangle */
1151                 source->rect = sink->rect;
1152                 source->f_width = mf->width;
1153                 source->f_height = mf->height;
1154         }
1155
1156         mutex_unlock(&fimc->lock);
1157         return 0;
1158 }
1159
1160 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1161                                           struct v4l2_subdev_pad_config *cfg,
1162                                           struct v4l2_subdev_selection *sel)
1163 {
1164         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1165         struct flite_frame *f = &fimc->inp_frame;
1166
1167         if ((sel->target != V4L2_SEL_TGT_CROP &&
1168              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1169              sel->pad != FLITE_SD_PAD_SINK)
1170                 return -EINVAL;
1171
1172         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1173                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1174                 return 0;
1175         }
1176
1177         mutex_lock(&fimc->lock);
1178         if (sel->target == V4L2_SEL_TGT_CROP) {
1179                 sel->r = f->rect;
1180         } else {
1181                 sel->r.left = 0;
1182                 sel->r.top = 0;
1183                 sel->r.width = f->f_width;
1184                 sel->r.height = f->f_height;
1185         }
1186         mutex_unlock(&fimc->lock);
1187
1188         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1189                  __func__, f->rect.left, f->rect.top, f->rect.width,
1190                  f->rect.height, f->f_width, f->f_height);
1191
1192         return 0;
1193 }
1194
1195 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1196                                           struct v4l2_subdev_pad_config *cfg,
1197                                           struct v4l2_subdev_selection *sel)
1198 {
1199         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1200         struct flite_frame *f = &fimc->inp_frame;
1201         int ret = 0;
1202
1203         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1204                 return -EINVAL;
1205
1206         mutex_lock(&fimc->lock);
1207         fimc_lite_try_crop(fimc, &sel->r);
1208
1209         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1210                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1211         } else {
1212                 unsigned long flags;
1213                 spin_lock_irqsave(&fimc->slock, flags);
1214                 f->rect = sel->r;
1215                 /* Same crop rectangle on the source pad */
1216                 fimc->out_frame.rect = sel->r;
1217                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1218                 spin_unlock_irqrestore(&fimc->slock, flags);
1219         }
1220         mutex_unlock(&fimc->lock);
1221
1222         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1223                  __func__, f->rect.left, f->rect.top, f->rect.width,
1224                  f->rect.height, f->f_width, f->f_height);
1225
1226         return ret;
1227 }
1228
1229 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1230 {
1231         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1232         unsigned long flags;
1233         int ret;
1234
1235         /*
1236          * Find sensor subdev linked to FIMC-LITE directly or through
1237          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1238          * is used as a subdev only and feeds data internally to FIMC-IS.
1239          * The pipeline links are protected through entity.stream_count
1240          * so there is no need to take the media graph mutex here.
1241          */
1242         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1243
1244         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1245                 return -ENOIOCTLCMD;
1246
1247         mutex_lock(&fimc->lock);
1248         if (on) {
1249                 flite_hw_reset(fimc);
1250                 ret = fimc_lite_hw_init(fimc, true);
1251                 if (!ret) {
1252                         spin_lock_irqsave(&fimc->slock, flags);
1253                         flite_hw_capture_start(fimc);
1254                         spin_unlock_irqrestore(&fimc->slock, flags);
1255                 }
1256         } else {
1257                 set_bit(ST_FLITE_OFF, &fimc->state);
1258
1259                 spin_lock_irqsave(&fimc->slock, flags);
1260                 flite_hw_capture_stop(fimc);
1261                 spin_unlock_irqrestore(&fimc->slock, flags);
1262
1263                 ret = wait_event_timeout(fimc->irq_queue,
1264                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1265                                 msecs_to_jiffies(200));
1266                 if (ret == 0)
1267                         v4l2_err(sd, "s_stream(0) timeout\n");
1268                 clear_bit(ST_FLITE_RUN, &fimc->state);
1269         }
1270
1271         mutex_unlock(&fimc->lock);
1272         return ret;
1273 }
1274
1275 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1276 {
1277         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1278
1279         flite_hw_dump_regs(fimc, __func__);
1280         return 0;
1281 }
1282
1283 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1284 {
1285         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1286         struct vb2_queue *q = &fimc->vb_queue;
1287         struct video_device *vfd = &fimc->ve.vdev;
1288         int ret;
1289
1290         memset(vfd, 0, sizeof(*vfd));
1291         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1292
1293         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1294                  fimc->index);
1295
1296         vfd->fops = &fimc_lite_fops;
1297         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1298         vfd->v4l2_dev = sd->v4l2_dev;
1299         vfd->minor = -1;
1300         vfd->release = video_device_release_empty;
1301         vfd->queue = q;
1302         fimc->reqbufs_count = 0;
1303
1304         INIT_LIST_HEAD(&fimc->pending_buf_q);
1305         INIT_LIST_HEAD(&fimc->active_buf_q);
1306
1307         memset(q, 0, sizeof(*q));
1308         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1309         q->io_modes = VB2_MMAP | VB2_USERPTR;
1310         q->ops = &fimc_lite_qops;
1311         q->mem_ops = &vb2_dma_contig_memops;
1312         q->buf_struct_size = sizeof(struct flite_buffer);
1313         q->drv_priv = fimc;
1314         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1315         q->lock = &fimc->lock;
1316
1317         ret = vb2_queue_init(q);
1318         if (ret < 0)
1319                 return ret;
1320
1321         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1322         ret = media_entity_init(&vfd->entity, 1, &fimc->vd_pad, 0);
1323         if (ret < 0)
1324                 return ret;
1325
1326         video_set_drvdata(vfd, fimc);
1327         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1328
1329         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1330         if (ret < 0) {
1331                 media_entity_cleanup(&vfd->entity);
1332                 fimc->ve.pipe = NULL;
1333                 return ret;
1334         }
1335
1336         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1337                   vfd->name, video_device_node_name(vfd));
1338         return 0;
1339 }
1340
1341 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1342 {
1343         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1344
1345         if (fimc == NULL)
1346                 return;
1347
1348         mutex_lock(&fimc->lock);
1349
1350         if (video_is_registered(&fimc->ve.vdev)) {
1351                 video_unregister_device(&fimc->ve.vdev);
1352                 media_entity_cleanup(&fimc->ve.vdev.entity);
1353                 fimc->ve.pipe = NULL;
1354         }
1355
1356         mutex_unlock(&fimc->lock);
1357 }
1358
1359 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1360         .registered = fimc_lite_subdev_registered,
1361         .unregistered = fimc_lite_subdev_unregistered,
1362 };
1363
1364 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1365         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1366         .get_selection = fimc_lite_subdev_get_selection,
1367         .set_selection = fimc_lite_subdev_set_selection,
1368         .get_fmt = fimc_lite_subdev_get_fmt,
1369         .set_fmt = fimc_lite_subdev_set_fmt,
1370 };
1371
1372 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1373         .s_stream = fimc_lite_subdev_s_stream,
1374 };
1375
1376 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1377         .log_status = fimc_lite_log_status,
1378 };
1379
1380 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1381         .core = &fimc_lite_core_ops,
1382         .video = &fimc_lite_subdev_video_ops,
1383         .pad = &fimc_lite_subdev_pad_ops,
1384 };
1385
1386 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1387 {
1388         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1389                                               ctrl_handler);
1390         set_bit(ST_FLITE_CONFIG, &fimc->state);
1391         return 0;
1392 }
1393
1394 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1395         .s_ctrl = fimc_lite_s_ctrl,
1396 };
1397
1398 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1399         .ops    = &fimc_lite_ctrl_ops,
1400         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1401         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1402         .name   = "Test Pattern 640x480",
1403         .step   = 1,
1404 };
1405
1406 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1407 {
1408         struct flite_frame *sink = &fimc->inp_frame;
1409         struct flite_frame *source = &fimc->out_frame;
1410
1411         sink->fmt = &fimc_lite_formats[0];
1412         sink->f_width = FLITE_DEFAULT_WIDTH;
1413         sink->f_height = FLITE_DEFAULT_HEIGHT;
1414
1415         sink->rect.width = FLITE_DEFAULT_WIDTH;
1416         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1417         sink->rect.left = 0;
1418         sink->rect.top = 0;
1419
1420         *source = *sink;
1421 }
1422
1423 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1424 {
1425         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1426         struct v4l2_subdev *sd = &fimc->subdev;
1427         int ret;
1428
1429         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1430         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1431         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1432
1433         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1434         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1435         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1436         ret = media_entity_init(&sd->entity, FLITE_SD_PADS_NUM,
1437                                 fimc->subdev_pads, 0);
1438         if (ret)
1439                 return ret;
1440
1441         v4l2_ctrl_handler_init(handler, 1);
1442         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1443                                                   NULL);
1444         if (handler->error) {
1445                 media_entity_cleanup(&sd->entity);
1446                 return handler->error;
1447         }
1448
1449         sd->ctrl_handler = handler;
1450         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1451         sd->entity.ops = &fimc_lite_subdev_media_ops;
1452         sd->owner = THIS_MODULE;
1453         v4l2_set_subdevdata(sd, fimc);
1454
1455         return 0;
1456 }
1457
1458 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1459 {
1460         struct v4l2_subdev *sd = &fimc->subdev;
1461
1462         v4l2_device_unregister_subdev(sd);
1463         media_entity_cleanup(&sd->entity);
1464         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1465         v4l2_set_subdevdata(sd, NULL);
1466 }
1467
1468 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1469 {
1470         if (IS_ERR(fimc->clock))
1471                 return;
1472
1473         clk_unprepare(fimc->clock);
1474         clk_put(fimc->clock);
1475         fimc->clock = ERR_PTR(-EINVAL);
1476 }
1477
1478 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1479 {
1480         int ret;
1481
1482         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1483         if (IS_ERR(fimc->clock))
1484                 return PTR_ERR(fimc->clock);
1485
1486         ret = clk_prepare(fimc->clock);
1487         if (ret < 0) {
1488                 clk_put(fimc->clock);
1489                 fimc->clock = ERR_PTR(-EINVAL);
1490         }
1491         return ret;
1492 }
1493
1494 static const struct of_device_id flite_of_match[];
1495
1496 static int fimc_lite_probe(struct platform_device *pdev)
1497 {
1498         struct flite_drvdata *drv_data = NULL;
1499         struct device *dev = &pdev->dev;
1500         const struct of_device_id *of_id;
1501         struct fimc_lite *fimc;
1502         struct resource *res;
1503         int ret;
1504
1505         if (!dev->of_node)
1506                 return -ENODEV;
1507
1508         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1509         if (!fimc)
1510                 return -ENOMEM;
1511
1512         of_id = of_match_node(flite_of_match, dev->of_node);
1513         if (of_id)
1514                 drv_data = (struct flite_drvdata *)of_id->data;
1515         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1516
1517         if (!drv_data || fimc->index >= drv_data->num_instances ||
1518                                                 fimc->index < 0) {
1519                 dev_err(dev, "Wrong %s node alias\n",
1520                                         dev->of_node->full_name);
1521                 return -EINVAL;
1522         }
1523
1524         fimc->dd = drv_data;
1525         fimc->pdev = pdev;
1526
1527         init_waitqueue_head(&fimc->irq_queue);
1528         spin_lock_init(&fimc->slock);
1529         mutex_init(&fimc->lock);
1530
1531         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1532         fimc->regs = devm_ioremap_resource(dev, res);
1533         if (IS_ERR(fimc->regs))
1534                 return PTR_ERR(fimc->regs);
1535
1536         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1537         if (res == NULL) {
1538                 dev_err(dev, "Failed to get IRQ resource\n");
1539                 return -ENXIO;
1540         }
1541
1542         ret = fimc_lite_clk_get(fimc);
1543         if (ret)
1544                 return ret;
1545
1546         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1547                                0, dev_name(dev), fimc);
1548         if (ret) {
1549                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1550                 goto err_clk_put;
1551         }
1552
1553         /* The video node will be created within the subdev's registered() op */
1554         ret = fimc_lite_create_capture_subdev(fimc);
1555         if (ret)
1556                 goto err_clk_put;
1557
1558         platform_set_drvdata(pdev, fimc);
1559         pm_runtime_enable(dev);
1560
1561         if (!pm_runtime_enabled(dev)) {
1562                 ret = clk_enable(fimc->clock);
1563                 if (ret < 0)
1564                         goto err_sd;
1565         }
1566
1567         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1568         if (IS_ERR(fimc->alloc_ctx)) {
1569                 ret = PTR_ERR(fimc->alloc_ctx);
1570                 goto err_clk_dis;
1571         }
1572
1573         fimc_lite_set_default_config(fimc);
1574
1575         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1576                 fimc->index);
1577         return 0;
1578
1579 err_clk_dis:
1580         if (!pm_runtime_enabled(dev))
1581                 clk_disable(fimc->clock);
1582 err_sd:
1583         fimc_lite_unregister_capture_subdev(fimc);
1584 err_clk_put:
1585         fimc_lite_clk_put(fimc);
1586         return ret;
1587 }
1588
1589 #ifdef CONFIG_PM
1590 static int fimc_lite_runtime_resume(struct device *dev)
1591 {
1592         struct fimc_lite *fimc = dev_get_drvdata(dev);
1593
1594         clk_enable(fimc->clock);
1595         return 0;
1596 }
1597
1598 static int fimc_lite_runtime_suspend(struct device *dev)
1599 {
1600         struct fimc_lite *fimc = dev_get_drvdata(dev);
1601
1602         clk_disable(fimc->clock);
1603         return 0;
1604 }
1605 #endif
1606
1607 #ifdef CONFIG_PM_SLEEP
1608 static int fimc_lite_resume(struct device *dev)
1609 {
1610         struct fimc_lite *fimc = dev_get_drvdata(dev);
1611         struct flite_buffer *buf;
1612         unsigned long flags;
1613         int i;
1614
1615         spin_lock_irqsave(&fimc->slock, flags);
1616         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1617             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1618                 spin_unlock_irqrestore(&fimc->slock, flags);
1619                 return 0;
1620         }
1621         flite_hw_reset(fimc);
1622         spin_unlock_irqrestore(&fimc->slock, flags);
1623
1624         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1625                 return 0;
1626
1627         INIT_LIST_HEAD(&fimc->active_buf_q);
1628         fimc_pipeline_call(&fimc->ve, open,
1629                            &fimc->ve.vdev.entity, false);
1630         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1631         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1632
1633         for (i = 0; i < fimc->reqbufs_count; i++) {
1634                 if (list_empty(&fimc->pending_buf_q))
1635                         break;
1636                 buf = fimc_lite_pending_queue_pop(fimc);
1637                 buffer_queue(&buf->vb.vb2_buf);
1638         }
1639         return 0;
1640 }
1641
1642 static int fimc_lite_suspend(struct device *dev)
1643 {
1644         struct fimc_lite *fimc = dev_get_drvdata(dev);
1645         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1646         int ret;
1647
1648         if (test_and_set_bit(ST_LPM, &fimc->state))
1649                 return 0;
1650
1651         ret = fimc_lite_stop_capture(fimc, suspend);
1652         if (ret < 0 || !fimc_lite_active(fimc))
1653                 return ret;
1654
1655         return fimc_pipeline_call(&fimc->ve, close);
1656 }
1657 #endif /* CONFIG_PM_SLEEP */
1658
1659 static int fimc_lite_remove(struct platform_device *pdev)
1660 {
1661         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1662         struct device *dev = &pdev->dev;
1663
1664         pm_runtime_disable(dev);
1665         pm_runtime_set_suspended(dev);
1666         fimc_lite_unregister_capture_subdev(fimc);
1667         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1668         fimc_lite_clk_put(fimc);
1669
1670         dev_info(dev, "Driver unloaded\n");
1671         return 0;
1672 }
1673
1674 static const struct dev_pm_ops fimc_lite_pm_ops = {
1675         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1676         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1677                            NULL)
1678 };
1679
1680 /* EXYNOS4212, EXYNOS4412 */
1681 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1682         .max_width              = 8192,
1683         .max_height             = 8192,
1684         .out_width_align        = 8,
1685         .win_hor_offs_align     = 2,
1686         .out_hor_offs_align     = 8,
1687         .max_dma_bufs           = 1,
1688         .num_instances          = 2,
1689 };
1690
1691 /* EXYNOS5250 */
1692 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1693         .max_width              = 8192,
1694         .max_height             = 8192,
1695         .out_width_align        = 8,
1696         .win_hor_offs_align     = 2,
1697         .out_hor_offs_align     = 8,
1698         .max_dma_bufs           = 32,
1699         .num_instances          = 3,
1700 };
1701
1702 static const struct of_device_id flite_of_match[] = {
1703         {
1704                 .compatible = "samsung,exynos4212-fimc-lite",
1705                 .data = &fimc_lite_drvdata_exynos4,
1706         },
1707         {
1708                 .compatible = "samsung,exynos5250-fimc-lite",
1709                 .data = &fimc_lite_drvdata_exynos5,
1710         },
1711         { /* sentinel */ },
1712 };
1713 MODULE_DEVICE_TABLE(of, flite_of_match);
1714
1715 static struct platform_driver fimc_lite_driver = {
1716         .probe          = fimc_lite_probe,
1717         .remove         = fimc_lite_remove,
1718         .driver = {
1719                 .of_match_table = flite_of_match,
1720                 .name           = FIMC_LITE_DRV_NAME,
1721                 .pm             = &fimc_lite_pm_ops,
1722         }
1723 };
1724 module_platform_driver(fimc_lite_driver);
1725 MODULE_LICENSE("GPL");
1726 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);