kernel/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-core.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_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_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         struct timeval *tv;
 258         struct timespec ts;
 259         u32 intsrc;
 260
 261         spin_lock_irqsave(&fimc->slock, flags);
 262
 263         intsrc = flite_hw_get_interrupt_source(fimc);
 264         flite_hw_clear_pending_irq(fimc);
 265
 266         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
 267                 wake_up(&fimc->irq_queue);
 268                 goto done;
 269         }
 270
 271         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
 272                 clear_bit(ST_FLITE_RUN, &fimc->state);
 273                 fimc->events.data_overflow++;
 274         }
 275
 276         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
 277                 flite_hw_clear_last_capture_end(fimc);
 278                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 279                 wake_up(&fimc->irq_queue);
 280         }
 281
 282         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 283                 goto done;
 284
 285         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
 286             test_bit(ST_FLITE_RUN, &fimc->state) &&
 287             !list_empty(&fimc->pending_buf_q)) {
 288                 vbuf = fimc_lite_pending_queue_pop(fimc);
 289                 flite_hw_set_dma_buffer(fimc, vbuf);
 290                 fimc_lite_active_queue_add(fimc, vbuf);
 291         }
 292
 293         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
 294             test_bit(ST_FLITE_RUN, &fimc->state) &&
 295             !list_empty(&fimc->active_buf_q)) {
 296                 vbuf = fimc_lite_active_queue_pop(fimc);
 297                 ktime_get_ts(&ts);
 298                 tv = &vbuf->vb.v4l2_buf.timestamp;
 299                 tv->tv_sec = ts.tv_sec;
 300                 tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
 301                 vbuf->vb.v4l2_buf.sequence = fimc->frame_count++;
 302                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
 303                 vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
 304         }
 305
 306         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
 307                 fimc_lite_config_update(fimc);
 308
 309         if (list_empty(&fimc->pending_buf_q)) {
 310                 flite_hw_capture_stop(fimc);
 311                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 312         }
 313 done:
 314         set_bit(ST_FLITE_RUN, &fimc->state);
 315         spin_unlock_irqrestore(&fimc->slock, flags);
 316         return IRQ_HANDLED;
 317 }
 318
 319 static int start_streaming(struct vb2_queue *q, unsigned int count)
 320 {
 321         struct fimc_lite *fimc = q->drv_priv;
 322         unsigned long flags;
 323         int ret;
 324
 325         spin_lock_irqsave(&fimc->slock, flags);
 326
 327         fimc->buf_index = 0;
 328         fimc->frame_count = 0;
 329
 330         spin_unlock_irqrestore(&fimc->slock, flags);
 331
 332         ret = fimc_lite_hw_init(fimc, false);
 333         if (ret) {
 334                 fimc_lite_reinit(fimc, false);
 335                 return ret;
 336         }
 337
 338         set_bit(ST_FLITE_PENDING, &fimc->state);
 339
 340         if (!list_empty(&fimc->active_buf_q) &&
 341             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 342                 flite_hw_capture_start(fimc);
 343
 344                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 345                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 346         }
 347         if (debug > 0)
 348                 flite_hw_dump_regs(fimc, __func__);
 349
 350         return 0;
 351 }
 352
 353 static void stop_streaming(struct vb2_queue *q)
 354 {
 355         struct fimc_lite *fimc = q->drv_priv;
 356
 357         if (!fimc_lite_active(fimc))
 358                 return;
 359
 360         fimc_lite_stop_capture(fimc, false);
 361 }
 362
 363 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
 364                        unsigned int *num_buffers, unsigned int *num_planes,
 365                        unsigned int sizes[], void *allocators[])
 366 {
 367         const struct v4l2_pix_format_mplane *pixm = NULL;
 368         struct fimc_lite *fimc = vq->drv_priv;
 369         struct flite_frame *frame = &fimc->out_frame;
 370         const struct fimc_fmt *fmt = frame->fmt;
 371         unsigned long wh;
 372         int i;
 373
 374         if (pfmt) {
 375                 pixm = &pfmt->fmt.pix_mp;
 376                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, 0, -1);
 377                 wh = pixm->width * pixm->height;
 378         } else {
 379                 wh = frame->f_width * frame->f_height;
 380         }
 381
 382         if (fmt == NULL)
 383                 return -EINVAL;
 384
 385         *num_planes = fmt->memplanes;
 386
 387         for (i = 0; i < fmt->memplanes; i++) {
 388                 unsigned int size = (wh * fmt->depth[i]) / 8;
 389                 if (pixm)
 390                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
 391                 else
 392                         sizes[i] = size;
 393                 allocators[i] = fimc->alloc_ctx;
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int buffer_prepare(struct vb2_buffer *vb)
 400 {
 401         struct vb2_queue *vq = vb->vb2_queue;
 402         struct fimc_lite *fimc = vq->drv_priv;
 403         int i;
 404
 405         if (fimc->out_frame.fmt == NULL)
 406                 return -EINVAL;
 407
 408         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 409                 unsigned long size = fimc->payload[i];
 410
 411                 if (vb2_plane_size(vb, i) < size) {
 412                         v4l2_err(&fimc->ve.vdev,
 413                                  "User buffer too small (%ld < %ld)\n",
 414                                  vb2_plane_size(vb, i), size);
 415                         return -EINVAL;
 416                 }
 417                 vb2_set_plane_payload(vb, i, size);
 418         }
 419
 420         return 0;
 421 }
 422
 423 static void buffer_queue(struct vb2_buffer *vb)
 424 {
 425         struct flite_buffer *buf
 426                 = container_of(vb, struct flite_buffer, vb);
 427         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 428         unsigned long flags;
 429
 430         spin_lock_irqsave(&fimc->slock, flags);
 431         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
 432
 433         buf->index = fimc->buf_index++;
 434         if (fimc->buf_index >= fimc->reqbufs_count)
 435                 fimc->buf_index = 0;
 436
 437         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 438             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 439             list_empty(&fimc->active_buf_q)) {
 440                 flite_hw_set_dma_buffer(fimc, buf);
 441                 fimc_lite_active_queue_add(fimc, buf);
 442         } else {
 443                 fimc_lite_pending_queue_add(fimc, buf);
 444         }
 445
 446         if (vb2_is_streaming(&fimc->vb_queue) &&
 447             !list_empty(&fimc->pending_buf_q) &&
 448             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 449                 flite_hw_capture_start(fimc);
 450                 spin_unlock_irqrestore(&fimc->slock, flags);
 451
 452                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 453                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 454                 return;
 455         }
 456         spin_unlock_irqrestore(&fimc->slock, flags);
 457 }
 458
 459 static const struct vb2_ops fimc_lite_qops = {
 460         .queue_setup     = queue_setup,
 461         .buf_prepare     = buffer_prepare,
 462         .buf_queue       = buffer_queue,
 463         .wait_prepare    = vb2_ops_wait_prepare,
 464         .wait_finish     = vb2_ops_wait_finish,
 465         .start_streaming = start_streaming,
 466         .stop_streaming  = stop_streaming,
 467 };
 468
 469 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 470 {
 471         unsigned long flags;
 472
 473         spin_lock_irqsave(&fimc->slock, flags);
 474         memset(&fimc->events, 0, sizeof(fimc->events));
 475         spin_unlock_irqrestore(&fimc->slock, flags);
 476 }
 477
 478 static int fimc_lite_open(struct file *file)
 479 {
 480         struct fimc_lite *fimc = video_drvdata(file);
 481         struct media_entity *me = &fimc->ve.vdev.entity;
 482         int ret;
 483
 484         mutex_lock(&fimc->lock);
 485         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 486                 ret = -EBUSY;
 487                 goto unlock;
 488         }
 489
 490         set_bit(ST_FLITE_IN_USE, &fimc->state);
 491         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 492         if (ret < 0)
 493                 goto unlock;
 494
 495         ret = v4l2_fh_open(file);
 496         if (ret < 0)
 497                 goto err_pm;
 498
 499         if (!v4l2_fh_is_singular_file(file) ||
 500             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 501                 goto unlock;
 502
 503         mutex_lock(&me->parent->graph_mutex);
 504
 505         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 506
 507         /* Mark video pipeline ending at this video node as in use. */
 508         if (ret == 0)
 509                 me->use_count++;
 510
 511         mutex_unlock(&me->parent->graph_mutex);
 512
 513         if (!ret) {
 514                 fimc_lite_clear_event_counters(fimc);
 515                 goto unlock;
 516         }
 517
 518         v4l2_fh_release(file);
 519 err_pm:
 520         pm_runtime_put_sync(&fimc->pdev->dev);
 521         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 522 unlock:
 523         mutex_unlock(&fimc->lock);
 524         return ret;
 525 }
 526
 527 static int fimc_lite_release(struct file *file)
 528 {
 529         struct fimc_lite *fimc = video_drvdata(file);
 530         struct media_entity *entity = &fimc->ve.vdev.entity;
 531
 532         mutex_lock(&fimc->lock);
 533
 534         if (v4l2_fh_is_singular_file(file) &&
 535             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 536                 if (fimc->streaming) {
 537                         media_entity_pipeline_stop(entity);
 538                         fimc->streaming = false;
 539                 }
 540                 fimc_lite_stop_capture(fimc, false);
 541                 fimc_pipeline_call(&fimc->ve, close);
 542                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 543
 544                 mutex_lock(&entity->parent->graph_mutex);
 545                 entity->use_count--;
 546                 mutex_unlock(&entity->parent->graph_mutex);
 547         }
 548
 549         _vb2_fop_release(file, NULL);
 550         pm_runtime_put(&fimc->pdev->dev);
 551         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 552
 553         mutex_unlock(&fimc->lock);
 554         return 0;
 555 }
 556
 557 static const struct v4l2_file_operations fimc_lite_fops = {
 558         .owner          = THIS_MODULE,
 559         .open           = fimc_lite_open,
 560         .release        = fimc_lite_release,
 561         .poll           = vb2_fop_poll,
 562         .unlocked_ioctl = video_ioctl2,
 563         .mmap           = vb2_fop_mmap,
 564 };
 565
 566 /*
 567  * Format and crop negotiation helpers
 568  */
 569
 570 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 571                                         struct v4l2_subdev_pad_config *cfg,
 572                                         struct v4l2_subdev_format *format)
 573 {
 574         struct flite_drvdata *dd = fimc->dd;
 575         struct v4l2_mbus_framefmt *mf = &format->format;
 576         const struct fimc_fmt *fmt = NULL;
 577
 578         if (format->pad == FLITE_SD_PAD_SINK) {
 579                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 580                                 ffs(dd->out_width_align) - 1,
 581                                 &mf->height, 0, dd->max_height, 0, 0);
 582
 583                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 584                 if (WARN_ON(!fmt))
 585                         return NULL;
 586
 587                 mf->colorspace = fmt->colorspace;
 588                 mf->code = fmt->mbus_code;
 589         } else {
 590                 struct flite_frame *sink = &fimc->inp_frame;
 591                 struct v4l2_mbus_framefmt *sink_fmt;
 592                 struct v4l2_rect *rect;
 593
 594                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 595                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
 596                                                 FLITE_SD_PAD_SINK);
 597
 598                         mf->code = sink_fmt->code;
 599                         mf->colorspace = sink_fmt->colorspace;
 600
 601                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
 602                                                 FLITE_SD_PAD_SINK);
 603                 } else {
 604                         mf->code = sink->fmt->mbus_code;
 605                         mf->colorspace = sink->fmt->colorspace;
 606                         rect = &sink->rect;
 607                 }
 608
 609                 /* Allow changing format only on sink pad */
 610                 mf->width = rect->width;
 611                 mf->height = rect->height;
 612         }
 613
 614         mf->field = V4L2_FIELD_NONE;
 615
 616         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 617                  mf->code, mf->colorspace, mf->width, mf->height);
 618
 619         return fmt;
 620 }
 621
 622 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 623 {
 624         struct flite_frame *frame = &fimc->inp_frame;
 625
 626         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 627                               &r->height, 0, frame->f_height, 0, 0);
 628
 629         /* Adjust left/top if cropping rectangle got out of bounds */
 630         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 631         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 632         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 633
 634         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 635                  r->left, r->top, r->width, r->height,
 636                  frame->f_width, frame->f_height);
 637 }
 638
 639 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 640 {
 641         struct flite_frame *frame = &fimc->out_frame;
 642         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 643
 644         /* Scaling is not supported so we enforce compose rectangle size
 645            same as size of the sink crop rectangle. */
 646         r->width = crop_rect->width;
 647         r->height = crop_rect->height;
 648
 649         /* Adjust left/top if the composing rectangle got out of bounds */
 650         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 651         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 652         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 653
 654         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 655                  r->left, r->top, r->width, r->height,
 656                  frame->f_width, frame->f_height);
 657 }
 658
 659 /*
 660  * Video node ioctl operations
 661  */
 662 static int fimc_lite_querycap(struct file *file, void *priv,
 663                                         struct v4l2_capability *cap)
 664 {
 665         struct fimc_lite *fimc = video_drvdata(file);
 666
 667         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 668         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 669         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 670                                         dev_name(&fimc->pdev->dev));
 671
 672         cap->device_caps = V4L2_CAP_STREAMING;
 673         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 674         return 0;
 675 }
 676
 677 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
 678                                      struct v4l2_fmtdesc *f)
 679 {
 680         const struct fimc_fmt *fmt;
 681
 682         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 683                 return -EINVAL;
 684
 685         fmt = &fimc_lite_formats[f->index];
 686         strlcpy(f->description, fmt->name, sizeof(f->description));
 687         f->pixelformat = fmt->fourcc;
 688
 689         return 0;
 690 }
 691
 692 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 693                                   struct v4l2_format *f)
 694 {
 695         struct fimc_lite *fimc = video_drvdata(file);
 696         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 697         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 698         struct flite_frame *frame = &fimc->out_frame;
 699         const struct fimc_fmt *fmt = frame->fmt;
 700
 701         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 702         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 703
 704         pixm->num_planes = fmt->memplanes;
 705         pixm->pixelformat = fmt->fourcc;
 706         pixm->width = frame->f_width;
 707         pixm->height = frame->f_height;
 708         pixm->field = V4L2_FIELD_NONE;
 709         pixm->colorspace = fmt->colorspace;
 710         return 0;
 711 }
 712
 713 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 714                              struct v4l2_pix_format_mplane *pixm,
 715                              const struct fimc_fmt **ffmt)
 716 {
 717         u32 bpl = pixm->plane_fmt[0].bytesperline;
 718         struct flite_drvdata *dd = fimc->dd;
 719         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 720         const struct fimc_fmt *fmt;
 721
 722         if (WARN_ON(inp_fmt == NULL))
 723                 return -EINVAL;
 724         /*
 725          * We allow some flexibility only for YUV formats. In case of raw
 726          * raw Bayer the FIMC-LITE's output format must match its camera
 727          * interface input format.
 728          */
 729         if (inp_fmt->flags & FMT_FLAGS_YUV)
 730                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 731                                                 inp_fmt->flags, 0);
 732         else
 733                 fmt = inp_fmt;
 734
 735         if (WARN_ON(fmt == NULL))
 736                 return -EINVAL;
 737         if (ffmt)
 738                 *ffmt = fmt;
 739         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 740                               ffs(dd->out_width_align) - 1,
 741                               &pixm->height, 0, dd->max_height, 0, 0);
 742
 743         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 744                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 745                                                    fmt->depth[0]) / 8;
 746
 747         if (pixm->plane_fmt[0].sizeimage == 0)
 748                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 749                                                 fmt->depth[0]) / 8;
 750         pixm->num_planes = fmt->memplanes;
 751         pixm->pixelformat = fmt->fourcc;
 752         pixm->colorspace = fmt->colorspace;
 753         pixm->field = V4L2_FIELD_NONE;
 754         return 0;
 755 }
 756
 757 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 758                                     struct v4l2_format *f)
 759 {
 760         struct fimc_lite *fimc = video_drvdata(file);
 761         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 762 }
 763
 764 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 765                                   struct v4l2_format *f)
 766 {
 767         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 768         struct fimc_lite *fimc = video_drvdata(file);
 769         struct flite_frame *frame = &fimc->out_frame;
 770         const struct fimc_fmt *fmt = NULL;
 771         int ret;
 772
 773         if (vb2_is_busy(&fimc->vb_queue))
 774                 return -EBUSY;
 775
 776         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 777         if (ret < 0)
 778                 return ret;
 779
 780         frame->fmt = fmt;
 781         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 782                                pixm->plane_fmt[0].sizeimage);
 783         frame->f_width = pixm->width;
 784         frame->f_height = pixm->height;
 785
 786         return 0;
 787 }
 788
 789 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 790 {
 791         struct v4l2_subdev *sd = &fimc->subdev;
 792         struct v4l2_subdev_format sink_fmt, src_fmt;
 793         struct media_pad *pad;
 794         int ret;
 795
 796         while (1) {
 797                 /* Retrieve format at the sink pad */
 798                 pad = &sd->entity.pads[0];
 799                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 800                         break;
 801                 /* Don't call FIMC subdev operation to avoid nested locking */
 802                 if (sd == &fimc->subdev) {
 803                         struct flite_frame *ff = &fimc->out_frame;
 804                         sink_fmt.format.width = ff->f_width;
 805                         sink_fmt.format.height = ff->f_height;
 806                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 807                 } else {
 808                         sink_fmt.pad = pad->index;
 809                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 810                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 811                                                &sink_fmt);
 812                         if (ret < 0 && ret != -ENOIOCTLCMD)
 813                                 return -EPIPE;
 814                 }
 815                 /* Retrieve format at the source pad */
 816                 pad = media_entity_remote_pad(pad);
 817                 if (pad == NULL ||
 818                     media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 819                         break;
 820
 821                 sd = media_entity_to_v4l2_subdev(pad->entity);
 822                 src_fmt.pad = pad->index;
 823                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 824                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 825                 if (ret < 0 && ret != -ENOIOCTLCMD)
 826                         return -EPIPE;
 827
 828                 if (src_fmt.format.width != sink_fmt.format.width ||
 829                     src_fmt.format.height != sink_fmt.format.height ||
 830                     src_fmt.format.code != sink_fmt.format.code)
 831                         return -EPIPE;
 832         }
 833         return 0;
 834 }
 835
 836 static int fimc_lite_streamon(struct file *file, void *priv,
 837                               enum v4l2_buf_type type)
 838 {
 839         struct fimc_lite *fimc = video_drvdata(file);
 840         struct media_entity *entity = &fimc->ve.vdev.entity;
 841         int ret;
 842
 843         if (fimc_lite_active(fimc))
 844                 return -EBUSY;
 845
 846         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
 847         if (ret < 0)
 848                 return ret;
 849
 850         ret = fimc_pipeline_validate(fimc);
 851         if (ret < 0)
 852                 goto err_p_stop;
 853
 854         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 855
 856         ret = vb2_ioctl_streamon(file, priv, type);
 857         if (!ret) {
 858                 fimc->streaming = true;
 859                 return ret;
 860         }
 861
 862 err_p_stop:
 863         media_entity_pipeline_stop(entity);
 864         return 0;
 865 }
 866
 867 static int fimc_lite_streamoff(struct file *file, void *priv,
 868                                enum v4l2_buf_type type)
 869 {
 870         struct fimc_lite *fimc = video_drvdata(file);
 871         int ret;
 872
 873         ret = vb2_ioctl_streamoff(file, priv, type);
 874         if (ret < 0)
 875                 return ret;
 876
 877         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
 878         fimc->streaming = false;
 879         return 0;
 880 }
 881
 882 static int fimc_lite_reqbufs(struct file *file, void *priv,
 883                              struct v4l2_requestbuffers *reqbufs)
 884 {
 885         struct fimc_lite *fimc = video_drvdata(file);
 886         int ret;
 887
 888         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 889         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 890         if (!ret)
 891                 fimc->reqbufs_count = reqbufs->count;
 892
 893         return ret;
 894 }
 895
 896 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 897 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
 898 {
 899         if (a->left < b->left || a->top < b->top)
 900                 return 0;
 901         if (a->left + a->width > b->left + b->width)
 902                 return 0;
 903         if (a->top + a->height > b->top + b->height)
 904                 return 0;
 905
 906         return 1;
 907 }
 908
 909 static int fimc_lite_g_selection(struct file *file, void *fh,
 910                                  struct v4l2_selection *sel)
 911 {
 912         struct fimc_lite *fimc = video_drvdata(file);
 913         struct flite_frame *f = &fimc->out_frame;
 914
 915         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 916                 return -EINVAL;
 917
 918         switch (sel->target) {
 919         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 920         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 921                 sel->r.left = 0;
 922                 sel->r.top = 0;
 923                 sel->r.width = f->f_width;
 924                 sel->r.height = f->f_height;
 925                 return 0;
 926
 927         case V4L2_SEL_TGT_COMPOSE:
 928                 sel->r = f->rect;
 929                 return 0;
 930         }
 931
 932         return -EINVAL;
 933 }
 934
 935 static int fimc_lite_s_selection(struct file *file, void *fh,
 936                                  struct v4l2_selection *sel)
 937 {
 938         struct fimc_lite *fimc = video_drvdata(file);
 939         struct flite_frame *f = &fimc->out_frame;
 940         struct v4l2_rect rect = sel->r;
 941         unsigned long flags;
 942
 943         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
 944             sel->target != V4L2_SEL_TGT_COMPOSE)
 945                 return -EINVAL;
 946
 947         fimc_lite_try_compose(fimc, &rect);
 948
 949         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 950             !enclosed_rectangle(&rect, &sel->r))
 951                 return -ERANGE;
 952
 953         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 954             !enclosed_rectangle(&sel->r, &rect))
 955                 return -ERANGE;
 956
 957         sel->r = rect;
 958         spin_lock_irqsave(&fimc->slock, flags);
 959         f->rect = rect;
 960         set_bit(ST_FLITE_CONFIG, &fimc->state);
 961         spin_unlock_irqrestore(&fimc->slock, flags);
 962
 963         return 0;
 964 }
 965
 966 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 967         .vidioc_querycap                = fimc_lite_querycap,
 968         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
 969         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 970         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 971         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 972         .vidioc_g_selection             = fimc_lite_g_selection,
 973         .vidioc_s_selection             = fimc_lite_s_selection,
 974         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 975         .vidioc_querybuf                = vb2_ioctl_querybuf,
 976         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 977         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 978         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 979         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 980         .vidioc_streamon                = fimc_lite_streamon,
 981         .vidioc_streamoff               = fimc_lite_streamoff,
 982 };
 983
 984 /* Capture subdev media entity operations */
 985 static int fimc_lite_link_setup(struct media_entity *entity,
 986                                 const struct media_pad *local,
 987                                 const struct media_pad *remote, u32 flags)
 988 {
 989         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 990         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 991         unsigned int remote_ent_type = media_entity_type(remote->entity);
 992         int ret = 0;
 993
 994         if (WARN_ON(fimc == NULL))
 995                 return 0;
 996
 997         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 998                  __func__, remote->entity->name, local->entity->name,
 999                  flags, fimc->source_subdev_grp_id);
1000
1001         switch (local->index) {
1002         case FLITE_SD_PAD_SINK:
1003                 if (remote_ent_type != MEDIA_ENT_T_V4L2_SUBDEV) {
1004                         ret = -EINVAL;
1005                         break;
1006                 }
1007                 if (flags & MEDIA_LNK_FL_ENABLED) {
1008                         if (fimc->source_subdev_grp_id == 0)
1009                                 fimc->source_subdev_grp_id = sd->grp_id;
1010                         else
1011                                 ret = -EBUSY;
1012                 } else {
1013                         fimc->source_subdev_grp_id = 0;
1014                         fimc->sensor = NULL;
1015                 }
1016                 break;
1017
1018         case FLITE_SD_PAD_SOURCE_DMA:
1019                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1020                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1021                 else if (remote_ent_type == MEDIA_ENT_T_DEVNODE)
1022                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1023                 else
1024                         ret = -EINVAL;
1025                 break;
1026
1027         case FLITE_SD_PAD_SOURCE_ISP:
1028                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1029                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1030                 else if (remote_ent_type == MEDIA_ENT_T_V4L2_SUBDEV)
1031                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1032                 else
1033                         ret = -EINVAL;
1034                 break;
1035
1036         default:
1037                 v4l2_err(sd, "Invalid pad index\n");
1038                 ret = -EINVAL;
1039         }
1040         mb();
1041
1042         return ret;
1043 }
1044
1045 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1046         .link_setup = fimc_lite_link_setup,
1047 };
1048
1049 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1050                                            struct v4l2_subdev_pad_config *cfg,
1051                                            struct v4l2_subdev_mbus_code_enum *code)
1052 {
1053         const struct fimc_fmt *fmt;
1054
1055         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1056         if (!fmt)
1057                 return -EINVAL;
1058         code->code = fmt->mbus_code;
1059         return 0;
1060 }
1061
1062 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1063                 struct v4l2_subdev *sd,
1064                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1065 {
1066         if (pad != FLITE_SD_PAD_SINK)
1067                 pad = FLITE_SD_PAD_SOURCE_DMA;
1068
1069         return v4l2_subdev_get_try_format(sd, cfg, pad);
1070 }
1071
1072 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1073                                     struct v4l2_subdev_pad_config *cfg,
1074                                     struct v4l2_subdev_format *fmt)
1075 {
1076         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1077         struct v4l2_mbus_framefmt *mf = &fmt->format;
1078         struct flite_frame *f = &fimc->inp_frame;
1079
1080         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1081                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1082                 fmt->format = *mf;
1083                 return 0;
1084         }
1085
1086         mutex_lock(&fimc->lock);
1087         mf->colorspace = f->fmt->colorspace;
1088         mf->code = f->fmt->mbus_code;
1089
1090         if (fmt->pad == FLITE_SD_PAD_SINK) {
1091                 /* full camera input frame size */
1092                 mf->width = f->f_width;
1093                 mf->height = f->f_height;
1094         } else {
1095                 /* crop size */
1096                 mf->width = f->rect.width;
1097                 mf->height = f->rect.height;
1098         }
1099         mutex_unlock(&fimc->lock);
1100         return 0;
1101 }
1102
1103 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1104                                     struct v4l2_subdev_pad_config *cfg,
1105                                     struct v4l2_subdev_format *fmt)
1106 {
1107         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1108         struct v4l2_mbus_framefmt *mf = &fmt->format;
1109         struct flite_frame *sink = &fimc->inp_frame;
1110         struct flite_frame *source = &fimc->out_frame;
1111         const struct fimc_fmt *ffmt;
1112
1113         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1114                  fmt->pad, mf->code, mf->width, mf->height);
1115
1116         mutex_lock(&fimc->lock);
1117
1118         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1119             sd->entity.stream_count > 0) ||
1120             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1121             vb2_is_busy(&fimc->vb_queue))) {
1122                 mutex_unlock(&fimc->lock);
1123                 return -EBUSY;
1124         }
1125
1126         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1127
1128         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1129                 struct v4l2_mbus_framefmt *src_fmt;
1130
1131                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1132                 *mf = fmt->format;
1133
1134                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1135                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1136                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1137                         *src_fmt = *mf;
1138                 }
1139
1140                 mutex_unlock(&fimc->lock);
1141                 return 0;
1142         }
1143
1144         if (fmt->pad == FLITE_SD_PAD_SINK) {
1145                 sink->f_width = mf->width;
1146                 sink->f_height = mf->height;
1147                 sink->fmt = ffmt;
1148                 /* Set sink crop rectangle */
1149                 sink->rect.width = mf->width;
1150                 sink->rect.height = mf->height;
1151                 sink->rect.left = 0;
1152                 sink->rect.top = 0;
1153                 /* Reset source format and crop rectangle */
1154                 source->rect = sink->rect;
1155                 source->f_width = mf->width;
1156                 source->f_height = mf->height;
1157         }
1158
1159         mutex_unlock(&fimc->lock);
1160         return 0;
1161 }
1162
1163 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1164                                           struct v4l2_subdev_pad_config *cfg,
1165                                           struct v4l2_subdev_selection *sel)
1166 {
1167         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1168         struct flite_frame *f = &fimc->inp_frame;
1169
1170         if ((sel->target != V4L2_SEL_TGT_CROP &&
1171              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1172              sel->pad != FLITE_SD_PAD_SINK)
1173                 return -EINVAL;
1174
1175         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1176                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1177                 return 0;
1178         }
1179
1180         mutex_lock(&fimc->lock);
1181         if (sel->target == V4L2_SEL_TGT_CROP) {
1182                 sel->r = f->rect;
1183         } else {
1184                 sel->r.left = 0;
1185                 sel->r.top = 0;
1186                 sel->r.width = f->f_width;
1187                 sel->r.height = f->f_height;
1188         }
1189         mutex_unlock(&fimc->lock);
1190
1191         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1192                  __func__, f->rect.left, f->rect.top, f->rect.width,
1193                  f->rect.height, f->f_width, f->f_height);
1194
1195         return 0;
1196 }
1197
1198 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1199                                           struct v4l2_subdev_pad_config *cfg,
1200                                           struct v4l2_subdev_selection *sel)
1201 {
1202         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1203         struct flite_frame *f = &fimc->inp_frame;
1204         int ret = 0;
1205
1206         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1207                 return -EINVAL;
1208
1209         mutex_lock(&fimc->lock);
1210         fimc_lite_try_crop(fimc, &sel->r);
1211
1212         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1213                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1214         } else {
1215                 unsigned long flags;
1216                 spin_lock_irqsave(&fimc->slock, flags);
1217                 f->rect = sel->r;
1218                 /* Same crop rectangle on the source pad */
1219                 fimc->out_frame.rect = sel->r;
1220                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1221                 spin_unlock_irqrestore(&fimc->slock, flags);
1222         }
1223         mutex_unlock(&fimc->lock);
1224
1225         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1226                  __func__, f->rect.left, f->rect.top, f->rect.width,
1227                  f->rect.height, f->f_width, f->f_height);
1228
1229         return ret;
1230 }
1231
1232 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1233 {
1234         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1235         unsigned long flags;
1236         int ret;
1237
1238         /*
1239          * Find sensor subdev linked to FIMC-LITE directly or through
1240          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1241          * is used as a subdev only and feeds data internally to FIMC-IS.
1242          * The pipeline links are protected through entity.stream_count
1243          * so there is no need to take the media graph mutex here.
1244          */
1245         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1246
1247         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1248                 return -ENOIOCTLCMD;
1249
1250         mutex_lock(&fimc->lock);
1251         if (on) {
1252                 flite_hw_reset(fimc);
1253                 ret = fimc_lite_hw_init(fimc, true);
1254                 if (!ret) {
1255                         spin_lock_irqsave(&fimc->slock, flags);
1256                         flite_hw_capture_start(fimc);
1257                         spin_unlock_irqrestore(&fimc->slock, flags);
1258                 }
1259         } else {
1260                 set_bit(ST_FLITE_OFF, &fimc->state);
1261
1262                 spin_lock_irqsave(&fimc->slock, flags);
1263                 flite_hw_capture_stop(fimc);
1264                 spin_unlock_irqrestore(&fimc->slock, flags);
1265
1266                 ret = wait_event_timeout(fimc->irq_queue,
1267                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1268                                 msecs_to_jiffies(200));
1269                 if (ret == 0)
1270                         v4l2_err(sd, "s_stream(0) timeout\n");
1271                 clear_bit(ST_FLITE_RUN, &fimc->state);
1272         }
1273
1274         mutex_unlock(&fimc->lock);
1275         return ret;
1276 }
1277
1278 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1279 {
1280         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1281
1282         flite_hw_dump_regs(fimc, __func__);
1283         return 0;
1284 }
1285
1286 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1287 {
1288         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1289         struct vb2_queue *q = &fimc->vb_queue;
1290         struct video_device *vfd = &fimc->ve.vdev;
1291         int ret;
1292
1293         memset(vfd, 0, sizeof(*vfd));
1294         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1295
1296         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1297                  fimc->index);
1298
1299         vfd->fops = &fimc_lite_fops;
1300         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1301         vfd->v4l2_dev = sd->v4l2_dev;
1302         vfd->minor = -1;
1303         vfd->release = video_device_release_empty;
1304         vfd->queue = q;
1305         fimc->reqbufs_count = 0;
1306
1307         INIT_LIST_HEAD(&fimc->pending_buf_q);
1308         INIT_LIST_HEAD(&fimc->active_buf_q);
1309
1310         memset(q, 0, sizeof(*q));
1311         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1312         q->io_modes = VB2_MMAP | VB2_USERPTR;
1313         q->ops = &fimc_lite_qops;
1314         q->mem_ops = &vb2_dma_contig_memops;
1315         q->buf_struct_size = sizeof(struct flite_buffer);
1316         q->drv_priv = fimc;
1317         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1318         q->lock = &fimc->lock;
1319
1320         ret = vb2_queue_init(q);
1321         if (ret < 0)
1322                 return ret;
1323
1324         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1325         ret = media_entity_init(&vfd->entity, 1, &fimc->vd_pad, 0);
1326         if (ret < 0)
1327                 return ret;
1328
1329         video_set_drvdata(vfd, fimc);
1330         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1331
1332         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1333         if (ret < 0) {
1334                 media_entity_cleanup(&vfd->entity);
1335                 fimc->ve.pipe = NULL;
1336                 return ret;
1337         }
1338
1339         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1340                   vfd->name, video_device_node_name(vfd));
1341         return 0;
1342 }
1343
1344 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1345 {
1346         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1347
1348         if (fimc == NULL)
1349                 return;
1350
1351         mutex_lock(&fimc->lock);
1352
1353         if (video_is_registered(&fimc->ve.vdev)) {
1354                 video_unregister_device(&fimc->ve.vdev);
1355                 media_entity_cleanup(&fimc->ve.vdev.entity);
1356                 fimc->ve.pipe = NULL;
1357         }
1358
1359         mutex_unlock(&fimc->lock);
1360 }
1361
1362 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1363         .registered = fimc_lite_subdev_registered,
1364         .unregistered = fimc_lite_subdev_unregistered,
1365 };
1366
1367 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1368         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1369         .get_selection = fimc_lite_subdev_get_selection,
1370         .set_selection = fimc_lite_subdev_set_selection,
1371         .get_fmt = fimc_lite_subdev_get_fmt,
1372         .set_fmt = fimc_lite_subdev_set_fmt,
1373 };
1374
1375 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1376         .s_stream = fimc_lite_subdev_s_stream,
1377 };
1378
1379 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1380         .log_status = fimc_lite_log_status,
1381 };
1382
1383 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1384         .core = &fimc_lite_core_ops,
1385         .video = &fimc_lite_subdev_video_ops,
1386         .pad = &fimc_lite_subdev_pad_ops,
1387 };
1388
1389 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1390 {
1391         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1392                                               ctrl_handler);
1393         set_bit(ST_FLITE_CONFIG, &fimc->state);
1394         return 0;
1395 }
1396
1397 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1398         .s_ctrl = fimc_lite_s_ctrl,
1399 };
1400
1401 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1402         .ops    = &fimc_lite_ctrl_ops,
1403         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1404         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1405         .name   = "Test Pattern 640x480",
1406         .step   = 1,
1407 };
1408
1409 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1410 {
1411         struct flite_frame *sink = &fimc->inp_frame;
1412         struct flite_frame *source = &fimc->out_frame;
1413
1414         sink->fmt = &fimc_lite_formats[0];
1415         sink->f_width = FLITE_DEFAULT_WIDTH;
1416         sink->f_height = FLITE_DEFAULT_HEIGHT;
1417
1418         sink->rect.width = FLITE_DEFAULT_WIDTH;
1419         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1420         sink->rect.left = 0;
1421         sink->rect.top = 0;
1422
1423         *source = *sink;
1424 }
1425
1426 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1427 {
1428         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1429         struct v4l2_subdev *sd = &fimc->subdev;
1430         int ret;
1431
1432         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1433         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1434         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1435
1436         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1437         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1438         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1439         ret = media_entity_init(&sd->entity, FLITE_SD_PADS_NUM,
1440                                 fimc->subdev_pads, 0);
1441         if (ret)
1442                 return ret;
1443
1444         v4l2_ctrl_handler_init(handler, 1);
1445         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1446                                                   NULL);
1447         if (handler->error) {
1448                 media_entity_cleanup(&sd->entity);
1449                 return handler->error;
1450         }
1451
1452         sd->ctrl_handler = handler;
1453         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1454         sd->entity.ops = &fimc_lite_subdev_media_ops;
1455         sd->owner = THIS_MODULE;
1456         v4l2_set_subdevdata(sd, fimc);
1457
1458         return 0;
1459 }
1460
1461 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1462 {
1463         struct v4l2_subdev *sd = &fimc->subdev;
1464
1465         v4l2_device_unregister_subdev(sd);
1466         media_entity_cleanup(&sd->entity);
1467         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1468         v4l2_set_subdevdata(sd, NULL);
1469 }
1470
1471 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1472 {
1473         if (IS_ERR(fimc->clock))
1474                 return;
1475
1476         clk_unprepare(fimc->clock);
1477         clk_put(fimc->clock);
1478         fimc->clock = ERR_PTR(-EINVAL);
1479 }
1480
1481 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1482 {
1483         int ret;
1484
1485         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1486         if (IS_ERR(fimc->clock))
1487                 return PTR_ERR(fimc->clock);
1488
1489         ret = clk_prepare(fimc->clock);
1490         if (ret < 0) {
1491                 clk_put(fimc->clock);
1492                 fimc->clock = ERR_PTR(-EINVAL);
1493         }
1494         return ret;
1495 }
1496
1497 static const struct of_device_id flite_of_match[];
1498
1499 static int fimc_lite_probe(struct platform_device *pdev)
1500 {
1501         struct flite_drvdata *drv_data = NULL;
1502         struct device *dev = &pdev->dev;
1503         const struct of_device_id *of_id;
1504         struct fimc_lite *fimc;
1505         struct resource *res;
1506         int ret;
1507
1508         if (!dev->of_node)
1509                 return -ENODEV;
1510
1511         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1512         if (!fimc)
1513                 return -ENOMEM;
1514
1515         of_id = of_match_node(flite_of_match, dev->of_node);
1516         if (of_id)
1517                 drv_data = (struct flite_drvdata *)of_id->data;
1518         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1519
1520         if (!drv_data || fimc->index >= drv_data->num_instances ||
1521                                                 fimc->index < 0) {
1522                 dev_err(dev, "Wrong %s node alias\n",
1523                                         dev->of_node->full_name);
1524                 return -EINVAL;
1525         }
1526
1527         fimc->dd = drv_data;
1528         fimc->pdev = pdev;
1529
1530         init_waitqueue_head(&fimc->irq_queue);
1531         spin_lock_init(&fimc->slock);
1532         mutex_init(&fimc->lock);
1533
1534         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1535         fimc->regs = devm_ioremap_resource(dev, res);
1536         if (IS_ERR(fimc->regs))
1537                 return PTR_ERR(fimc->regs);
1538
1539         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1540         if (res == NULL) {
1541                 dev_err(dev, "Failed to get IRQ resource\n");
1542                 return -ENXIO;
1543         }
1544
1545         ret = fimc_lite_clk_get(fimc);
1546         if (ret)
1547                 return ret;
1548
1549         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1550                                0, dev_name(dev), fimc);
1551         if (ret) {
1552                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1553                 goto err_clk_put;
1554         }
1555
1556         /* The video node will be created within the subdev's registered() op */
1557         ret = fimc_lite_create_capture_subdev(fimc);
1558         if (ret)
1559                 goto err_clk_put;
1560
1561         platform_set_drvdata(pdev, fimc);
1562         pm_runtime_enable(dev);
1563
1564         if (!pm_runtime_enabled(dev)) {
1565                 ret = clk_enable(fimc->clock);
1566                 if (ret < 0)
1567                         goto err_sd;
1568         }
1569
1570         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1571         if (IS_ERR(fimc->alloc_ctx)) {
1572                 ret = PTR_ERR(fimc->alloc_ctx);
1573                 goto err_clk_dis;
1574         }
1575
1576         fimc_lite_set_default_config(fimc);
1577
1578         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1579                 fimc->index);
1580         return 0;
1581
1582 err_clk_dis:
1583         if (!pm_runtime_enabled(dev))
1584                 clk_disable(fimc->clock);
1585 err_sd:
1586         fimc_lite_unregister_capture_subdev(fimc);
1587 err_clk_put:
1588         fimc_lite_clk_put(fimc);
1589         return ret;
1590 }
1591
1592 #ifdef CONFIG_PM
1593 static int fimc_lite_runtime_resume(struct device *dev)
1594 {
1595         struct fimc_lite *fimc = dev_get_drvdata(dev);
1596
1597         clk_enable(fimc->clock);
1598         return 0;
1599 }
1600
1601 static int fimc_lite_runtime_suspend(struct device *dev)
1602 {
1603         struct fimc_lite *fimc = dev_get_drvdata(dev);
1604
1605         clk_disable(fimc->clock);
1606         return 0;
1607 }
1608 #endif
1609
1610 #ifdef CONFIG_PM_SLEEP
1611 static int fimc_lite_resume(struct device *dev)
1612 {
1613         struct fimc_lite *fimc = dev_get_drvdata(dev);
1614         struct flite_buffer *buf;
1615         unsigned long flags;
1616         int i;
1617
1618         spin_lock_irqsave(&fimc->slock, flags);
1619         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1620             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1621                 spin_unlock_irqrestore(&fimc->slock, flags);
1622                 return 0;
1623         }
1624         flite_hw_reset(fimc);
1625         spin_unlock_irqrestore(&fimc->slock, flags);
1626
1627         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1628                 return 0;
1629
1630         INIT_LIST_HEAD(&fimc->active_buf_q);
1631         fimc_pipeline_call(&fimc->ve, open,
1632                            &fimc->ve.vdev.entity, false);
1633         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1634         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1635
1636         for (i = 0; i < fimc->reqbufs_count; i++) {
1637                 if (list_empty(&fimc->pending_buf_q))
1638                         break;
1639                 buf = fimc_lite_pending_queue_pop(fimc);
1640                 buffer_queue(&buf->vb);
1641         }
1642         return 0;
1643 }
1644
1645 static int fimc_lite_suspend(struct device *dev)
1646 {
1647         struct fimc_lite *fimc = dev_get_drvdata(dev);
1648         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1649         int ret;
1650
1651         if (test_and_set_bit(ST_LPM, &fimc->state))
1652                 return 0;
1653
1654         ret = fimc_lite_stop_capture(fimc, suspend);
1655         if (ret < 0 || !fimc_lite_active(fimc))
1656                 return ret;
1657
1658         return fimc_pipeline_call(&fimc->ve, close);
1659 }
1660 #endif /* CONFIG_PM_SLEEP */
1661
1662 static int fimc_lite_remove(struct platform_device *pdev)
1663 {
1664         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1665         struct device *dev = &pdev->dev;
1666
1667         pm_runtime_disable(dev);
1668         pm_runtime_set_suspended(dev);
1669         fimc_lite_unregister_capture_subdev(fimc);
1670         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1671         fimc_lite_clk_put(fimc);
1672
1673         dev_info(dev, "Driver unloaded\n");
1674         return 0;
1675 }
1676
1677 static const struct dev_pm_ops fimc_lite_pm_ops = {
1678         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1679         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1680                            NULL)
1681 };
1682
1683 /* EXYNOS4212, EXYNOS4412 */
1684 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1685         .max_width              = 8192,
1686         .max_height             = 8192,
1687         .out_width_align        = 8,
1688         .win_hor_offs_align     = 2,
1689         .out_hor_offs_align     = 8,
1690         .max_dma_bufs           = 1,
1691         .num_instances          = 2,
1692 };
1693
1694 /* EXYNOS5250 */
1695 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1696         .max_width              = 8192,
1697         .max_height             = 8192,
1698         .out_width_align        = 8,
1699         .win_hor_offs_align     = 2,
1700         .out_hor_offs_align     = 8,
1701         .max_dma_bufs           = 32,
1702         .num_instances          = 3,
1703 };
1704
1705 static const struct of_device_id flite_of_match[] = {
1706         {
1707                 .compatible = "samsung,exynos4212-fimc-lite",
1708                 .data = &fimc_lite_drvdata_exynos4,
1709         },
1710         {
1711                 .compatible = "samsung,exynos5250-fimc-lite",
1712                 .data = &fimc_lite_drvdata_exynos5,
1713         },
1714         { /* sentinel */ },
1715 };
1716 MODULE_DEVICE_TABLE(of, flite_of_match);
1717
1718 static struct platform_driver fimc_lite_driver = {
1719         .probe          = fimc_lite_probe,
1720         .remove         = fimc_lite_remove,
1721         .driver = {
1722                 .of_match_table = flite_of_match,
1723                 .name           = FIMC_LITE_DRV_NAME,
1724                 .pm             = &fimc_lite_pm_ops,
1725         }
1726 };
1727 module_platform_driver(fimc_lite_driver);
1728 MODULE_LICENSE("GPL");
1729 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);