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/drv-intf/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                 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 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,
 359                        unsigned int *num_buffers, unsigned int *num_planes,
 360                        unsigned int sizes[], void *allocators[])
 361 {
 362         struct fimc_lite *fimc = vq->drv_priv;
 363         struct flite_frame *frame = &fimc->out_frame;
 364         const struct fimc_fmt *fmt = frame->fmt;
 365         unsigned long wh = frame->f_width * frame->f_height;
 366         int i;
 367
 368         if (fmt == NULL)
 369                 return -EINVAL;
 370
 371         if (*num_planes) {
 372                 if (*num_planes != fmt->memplanes)
 373                         return -EINVAL;
 374                 for (i = 0; i < *num_planes; i++) {
 375                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
 376                                 return -EINVAL;
 377                         allocators[i] = fimc->alloc_ctx;
 378                 }
 379                 return 0;
 380         }
 381
 382         *num_planes = fmt->memplanes;
 383
 384         for (i = 0; i < fmt->memplanes; i++) {
 385                 sizes[i] = (wh * fmt->depth[i]) / 8;
 386                 allocators[i] = fimc->alloc_ctx;
 387         }
 388
 389         return 0;
 390 }
 391
 392 static int buffer_prepare(struct vb2_buffer *vb)
 393 {
 394         struct vb2_queue *vq = vb->vb2_queue;
 395         struct fimc_lite *fimc = vq->drv_priv;
 396         int i;
 397
 398         if (fimc->out_frame.fmt == NULL)
 399                 return -EINVAL;
 400
 401         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 402                 unsigned long size = fimc->payload[i];
 403
 404                 if (vb2_plane_size(vb, i) < size) {
 405                         v4l2_err(&fimc->ve.vdev,
 406                                  "User buffer too small (%ld < %ld)\n",
 407                                  vb2_plane_size(vb, i), size);
 408                         return -EINVAL;
 409                 }
 410                 vb2_set_plane_payload(vb, i, size);
 411         }
 412
 413         return 0;
 414 }
 415
 416 static void buffer_queue(struct vb2_buffer *vb)
 417 {
 418         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 419         struct flite_buffer *buf
 420                 = container_of(vbuf, struct flite_buffer, vb);
 421         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 422         unsigned long flags;
 423
 424         spin_lock_irqsave(&fimc->slock, flags);
 425         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
 426
 427         buf->index = fimc->buf_index++;
 428         if (fimc->buf_index >= fimc->reqbufs_count)
 429                 fimc->buf_index = 0;
 430
 431         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 432             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 433             list_empty(&fimc->active_buf_q)) {
 434                 flite_hw_set_dma_buffer(fimc, buf);
 435                 fimc_lite_active_queue_add(fimc, buf);
 436         } else {
 437                 fimc_lite_pending_queue_add(fimc, buf);
 438         }
 439
 440         if (vb2_is_streaming(&fimc->vb_queue) &&
 441             !list_empty(&fimc->pending_buf_q) &&
 442             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 443                 flite_hw_capture_start(fimc);
 444                 spin_unlock_irqrestore(&fimc->slock, flags);
 445
 446                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 447                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 448                 return;
 449         }
 450         spin_unlock_irqrestore(&fimc->slock, flags);
 451 }
 452
 453 static const struct vb2_ops fimc_lite_qops = {
 454         .queue_setup     = queue_setup,
 455         .buf_prepare     = buffer_prepare,
 456         .buf_queue       = buffer_queue,
 457         .wait_prepare    = vb2_ops_wait_prepare,
 458         .wait_finish     = vb2_ops_wait_finish,
 459         .start_streaming = start_streaming,
 460         .stop_streaming  = stop_streaming,
 461 };
 462
 463 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 464 {
 465         unsigned long flags;
 466
 467         spin_lock_irqsave(&fimc->slock, flags);
 468         memset(&fimc->events, 0, sizeof(fimc->events));
 469         spin_unlock_irqrestore(&fimc->slock, flags);
 470 }
 471
 472 static int fimc_lite_open(struct file *file)
 473 {
 474         struct fimc_lite *fimc = video_drvdata(file);
 475         struct media_entity *me = &fimc->ve.vdev.entity;
 476         int ret;
 477
 478         mutex_lock(&fimc->lock);
 479         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 480                 ret = -EBUSY;
 481                 goto unlock;
 482         }
 483
 484         set_bit(ST_FLITE_IN_USE, &fimc->state);
 485         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 486         if (ret < 0)
 487                 goto unlock;
 488
 489         ret = v4l2_fh_open(file);
 490         if (ret < 0)
 491                 goto err_pm;
 492
 493         if (!v4l2_fh_is_singular_file(file) ||
 494             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 495                 goto unlock;
 496
 497         mutex_lock(&me->graph_obj.mdev->graph_mutex);
 498
 499         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 500
 501         /* Mark video pipeline ending at this video node as in use. */
 502         if (ret == 0)
 503                 me->use_count++;
 504
 505         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 506
 507         if (!ret) {
 508                 fimc_lite_clear_event_counters(fimc);
 509                 goto unlock;
 510         }
 511
 512         v4l2_fh_release(file);
 513 err_pm:
 514         pm_runtime_put_sync(&fimc->pdev->dev);
 515         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 516 unlock:
 517         mutex_unlock(&fimc->lock);
 518         return ret;
 519 }
 520
 521 static int fimc_lite_release(struct file *file)
 522 {
 523         struct fimc_lite *fimc = video_drvdata(file);
 524         struct media_entity *entity = &fimc->ve.vdev.entity;
 525
 526         mutex_lock(&fimc->lock);
 527
 528         if (v4l2_fh_is_singular_file(file) &&
 529             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 530                 if (fimc->streaming) {
 531                         media_entity_pipeline_stop(entity);
 532                         fimc->streaming = false;
 533                 }
 534                 fimc_lite_stop_capture(fimc, false);
 535                 fimc_pipeline_call(&fimc->ve, close);
 536                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 537
 538                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
 539                 entity->use_count--;
 540                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
 541         }
 542
 543         _vb2_fop_release(file, NULL);
 544         pm_runtime_put(&fimc->pdev->dev);
 545         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 546
 547         mutex_unlock(&fimc->lock);
 548         return 0;
 549 }
 550
 551 static const struct v4l2_file_operations fimc_lite_fops = {
 552         .owner          = THIS_MODULE,
 553         .open           = fimc_lite_open,
 554         .release        = fimc_lite_release,
 555         .poll           = vb2_fop_poll,
 556         .unlocked_ioctl = video_ioctl2,
 557         .mmap           = vb2_fop_mmap,
 558 };
 559
 560 /*
 561  * Format and crop negotiation helpers
 562  */
 563
 564 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 565                                         struct v4l2_subdev_pad_config *cfg,
 566                                         struct v4l2_subdev_format *format)
 567 {
 568         struct flite_drvdata *dd = fimc->dd;
 569         struct v4l2_mbus_framefmt *mf = &format->format;
 570         const struct fimc_fmt *fmt = NULL;
 571
 572         if (format->pad == FLITE_SD_PAD_SINK) {
 573                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 574                                 ffs(dd->out_width_align) - 1,
 575                                 &mf->height, 0, dd->max_height, 0, 0);
 576
 577                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 578                 if (WARN_ON(!fmt))
 579                         return NULL;
 580
 581                 mf->colorspace = fmt->colorspace;
 582                 mf->code = fmt->mbus_code;
 583         } else {
 584                 struct flite_frame *sink = &fimc->inp_frame;
 585                 struct v4l2_mbus_framefmt *sink_fmt;
 586                 struct v4l2_rect *rect;
 587
 588                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 589                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
 590                                                 FLITE_SD_PAD_SINK);
 591
 592                         mf->code = sink_fmt->code;
 593                         mf->colorspace = sink_fmt->colorspace;
 594
 595                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
 596                                                 FLITE_SD_PAD_SINK);
 597                 } else {
 598                         mf->code = sink->fmt->mbus_code;
 599                         mf->colorspace = sink->fmt->colorspace;
 600                         rect = &sink->rect;
 601                 }
 602
 603                 /* Allow changing format only on sink pad */
 604                 mf->width = rect->width;
 605                 mf->height = rect->height;
 606         }
 607
 608         mf->field = V4L2_FIELD_NONE;
 609
 610         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 611                  mf->code, mf->colorspace, mf->width, mf->height);
 612
 613         return fmt;
 614 }
 615
 616 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 617 {
 618         struct flite_frame *frame = &fimc->inp_frame;
 619
 620         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 621                               &r->height, 0, frame->f_height, 0, 0);
 622
 623         /* Adjust left/top if cropping rectangle got out of bounds */
 624         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 625         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 626         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 627
 628         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 629                  r->left, r->top, r->width, r->height,
 630                  frame->f_width, frame->f_height);
 631 }
 632
 633 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 634 {
 635         struct flite_frame *frame = &fimc->out_frame;
 636         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 637
 638         /* Scaling is not supported so we enforce compose rectangle size
 639            same as size of the sink crop rectangle. */
 640         r->width = crop_rect->width;
 641         r->height = crop_rect->height;
 642
 643         /* Adjust left/top if the composing rectangle got out of bounds */
 644         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 645         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 646         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 647
 648         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 649                  r->left, r->top, r->width, r->height,
 650                  frame->f_width, frame->f_height);
 651 }
 652
 653 /*
 654  * Video node ioctl operations
 655  */
 656 static int fimc_lite_querycap(struct file *file, void *priv,
 657                                         struct v4l2_capability *cap)
 658 {
 659         struct fimc_lite *fimc = video_drvdata(file);
 660
 661         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 662         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 663         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 664                                         dev_name(&fimc->pdev->dev));
 665
 666         cap->device_caps = V4L2_CAP_STREAMING;
 667         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 668         return 0;
 669 }
 670
 671 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
 672                                      struct v4l2_fmtdesc *f)
 673 {
 674         const struct fimc_fmt *fmt;
 675
 676         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 677                 return -EINVAL;
 678
 679         fmt = &fimc_lite_formats[f->index];
 680         strlcpy(f->description, fmt->name, sizeof(f->description));
 681         f->pixelformat = fmt->fourcc;
 682
 683         return 0;
 684 }
 685
 686 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 687                                   struct v4l2_format *f)
 688 {
 689         struct fimc_lite *fimc = video_drvdata(file);
 690         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 691         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 692         struct flite_frame *frame = &fimc->out_frame;
 693         const struct fimc_fmt *fmt = frame->fmt;
 694
 695         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 696         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 697
 698         pixm->num_planes = fmt->memplanes;
 699         pixm->pixelformat = fmt->fourcc;
 700         pixm->width = frame->f_width;
 701         pixm->height = frame->f_height;
 702         pixm->field = V4L2_FIELD_NONE;
 703         pixm->colorspace = fmt->colorspace;
 704         return 0;
 705 }
 706
 707 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 708                              struct v4l2_pix_format_mplane *pixm,
 709                              const struct fimc_fmt **ffmt)
 710 {
 711         u32 bpl = pixm->plane_fmt[0].bytesperline;
 712         struct flite_drvdata *dd = fimc->dd;
 713         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 714         const struct fimc_fmt *fmt;
 715
 716         if (WARN_ON(inp_fmt == NULL))
 717                 return -EINVAL;
 718         /*
 719          * We allow some flexibility only for YUV formats. In case of raw
 720          * raw Bayer the FIMC-LITE's output format must match its camera
 721          * interface input format.
 722          */
 723         if (inp_fmt->flags & FMT_FLAGS_YUV)
 724                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 725                                                 inp_fmt->flags, 0);
 726         else
 727                 fmt = inp_fmt;
 728
 729         if (WARN_ON(fmt == NULL))
 730                 return -EINVAL;
 731         if (ffmt)
 732                 *ffmt = fmt;
 733         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 734                               ffs(dd->out_width_align) - 1,
 735                               &pixm->height, 0, dd->max_height, 0, 0);
 736
 737         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 738                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 739                                                    fmt->depth[0]) / 8;
 740
 741         if (pixm->plane_fmt[0].sizeimage == 0)
 742                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 743                                                 fmt->depth[0]) / 8;
 744         pixm->num_planes = fmt->memplanes;
 745         pixm->pixelformat = fmt->fourcc;
 746         pixm->colorspace = fmt->colorspace;
 747         pixm->field = V4L2_FIELD_NONE;
 748         return 0;
 749 }
 750
 751 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 752                                     struct v4l2_format *f)
 753 {
 754         struct fimc_lite *fimc = video_drvdata(file);
 755         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 756 }
 757
 758 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 759                                   struct v4l2_format *f)
 760 {
 761         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 762         struct fimc_lite *fimc = video_drvdata(file);
 763         struct flite_frame *frame = &fimc->out_frame;
 764         const struct fimc_fmt *fmt = NULL;
 765         int ret;
 766
 767         if (vb2_is_busy(&fimc->vb_queue))
 768                 return -EBUSY;
 769
 770         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 771         if (ret < 0)
 772                 return ret;
 773
 774         frame->fmt = fmt;
 775         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 776                                pixm->plane_fmt[0].sizeimage);
 777         frame->f_width = pixm->width;
 778         frame->f_height = pixm->height;
 779
 780         return 0;
 781 }
 782
 783 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 784 {
 785         struct v4l2_subdev *sd = &fimc->subdev;
 786         struct v4l2_subdev_format sink_fmt, src_fmt;
 787         struct media_pad *pad;
 788         int ret;
 789
 790         while (1) {
 791                 /* Retrieve format at the sink pad */
 792                 pad = &sd->entity.pads[0];
 793                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 794                         break;
 795                 /* Don't call FIMC subdev operation to avoid nested locking */
 796                 if (sd == &fimc->subdev) {
 797                         struct flite_frame *ff = &fimc->out_frame;
 798                         sink_fmt.format.width = ff->f_width;
 799                         sink_fmt.format.height = ff->f_height;
 800                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 801                 } else {
 802                         sink_fmt.pad = pad->index;
 803                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 804                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 805                                                &sink_fmt);
 806                         if (ret < 0 && ret != -ENOIOCTLCMD)
 807                                 return -EPIPE;
 808                 }
 809                 /* Retrieve format at the source pad */
 810                 pad = media_entity_remote_pad(pad);
 811                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 812                         break;
 813
 814                 sd = media_entity_to_v4l2_subdev(pad->entity);
 815                 src_fmt.pad = pad->index;
 816                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 817                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 818                 if (ret < 0 && ret != -ENOIOCTLCMD)
 819                         return -EPIPE;
 820
 821                 if (src_fmt.format.width != sink_fmt.format.width ||
 822                     src_fmt.format.height != sink_fmt.format.height ||
 823                     src_fmt.format.code != sink_fmt.format.code)
 824                         return -EPIPE;
 825         }
 826         return 0;
 827 }
 828
 829 static int fimc_lite_streamon(struct file *file, void *priv,
 830                               enum v4l2_buf_type type)
 831 {
 832         struct fimc_lite *fimc = video_drvdata(file);
 833         struct media_entity *entity = &fimc->ve.vdev.entity;
 834         int ret;
 835
 836         if (fimc_lite_active(fimc))
 837                 return -EBUSY;
 838
 839         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
 840         if (ret < 0)
 841                 return ret;
 842
 843         ret = fimc_pipeline_validate(fimc);
 844         if (ret < 0)
 845                 goto err_p_stop;
 846
 847         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 848
 849         ret = vb2_ioctl_streamon(file, priv, type);
 850         if (!ret) {
 851                 fimc->streaming = true;
 852                 return ret;
 853         }
 854
 855 err_p_stop:
 856         media_entity_pipeline_stop(entity);
 857         return 0;
 858 }
 859
 860 static int fimc_lite_streamoff(struct file *file, void *priv,
 861                                enum v4l2_buf_type type)
 862 {
 863         struct fimc_lite *fimc = video_drvdata(file);
 864         int ret;
 865
 866         ret = vb2_ioctl_streamoff(file, priv, type);
 867         if (ret < 0)
 868                 return ret;
 869
 870         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
 871         fimc->streaming = false;
 872         return 0;
 873 }
 874
 875 static int fimc_lite_reqbufs(struct file *file, void *priv,
 876                              struct v4l2_requestbuffers *reqbufs)
 877 {
 878         struct fimc_lite *fimc = video_drvdata(file);
 879         int ret;
 880
 881         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 882         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 883         if (!ret)
 884                 fimc->reqbufs_count = reqbufs->count;
 885
 886         return ret;
 887 }
 888
 889 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 890 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
 891 {
 892         if (a->left < b->left || a->top < b->top)
 893                 return 0;
 894         if (a->left + a->width > b->left + b->width)
 895                 return 0;
 896         if (a->top + a->height > b->top + b->height)
 897                 return 0;
 898
 899         return 1;
 900 }
 901
 902 static int fimc_lite_g_selection(struct file *file, void *fh,
 903                                  struct v4l2_selection *sel)
 904 {
 905         struct fimc_lite *fimc = video_drvdata(file);
 906         struct flite_frame *f = &fimc->out_frame;
 907
 908         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 909                 return -EINVAL;
 910
 911         switch (sel->target) {
 912         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 913         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 914                 sel->r.left = 0;
 915                 sel->r.top = 0;
 916                 sel->r.width = f->f_width;
 917                 sel->r.height = f->f_height;
 918                 return 0;
 919
 920         case V4L2_SEL_TGT_COMPOSE:
 921                 sel->r = f->rect;
 922                 return 0;
 923         }
 924
 925         return -EINVAL;
 926 }
 927
 928 static int fimc_lite_s_selection(struct file *file, void *fh,
 929                                  struct v4l2_selection *sel)
 930 {
 931         struct fimc_lite *fimc = video_drvdata(file);
 932         struct flite_frame *f = &fimc->out_frame;
 933         struct v4l2_rect rect = sel->r;
 934         unsigned long flags;
 935
 936         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
 937             sel->target != V4L2_SEL_TGT_COMPOSE)
 938                 return -EINVAL;
 939
 940         fimc_lite_try_compose(fimc, &rect);
 941
 942         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 943             !enclosed_rectangle(&rect, &sel->r))
 944                 return -ERANGE;
 945
 946         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 947             !enclosed_rectangle(&sel->r, &rect))
 948                 return -ERANGE;
 949
 950         sel->r = rect;
 951         spin_lock_irqsave(&fimc->slock, flags);
 952         f->rect = rect;
 953         set_bit(ST_FLITE_CONFIG, &fimc->state);
 954         spin_unlock_irqrestore(&fimc->slock, flags);
 955
 956         return 0;
 957 }
 958
 959 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 960         .vidioc_querycap                = fimc_lite_querycap,
 961         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
 962         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 963         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 964         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 965         .vidioc_g_selection             = fimc_lite_g_selection,
 966         .vidioc_s_selection             = fimc_lite_s_selection,
 967         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 968         .vidioc_querybuf                = vb2_ioctl_querybuf,
 969         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 970         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 971         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 972         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 973         .vidioc_streamon                = fimc_lite_streamon,
 974         .vidioc_streamoff               = fimc_lite_streamoff,
 975 };
 976
 977 /* Capture subdev media entity operations */
 978 static int fimc_lite_link_setup(struct media_entity *entity,
 979                                 const struct media_pad *local,
 980                                 const struct media_pad *remote, u32 flags)
 981 {
 982         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 983         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 984         int ret = 0;
 985
 986         if (WARN_ON(fimc == NULL))
 987                 return 0;
 988
 989         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 990                  __func__, remote->entity->name, local->entity->name,
 991                  flags, fimc->source_subdev_grp_id);
 992
 993         switch (local->index) {
 994         case FLITE_SD_PAD_SINK:
 995                 if (flags & MEDIA_LNK_FL_ENABLED) {
 996                         if (fimc->source_subdev_grp_id == 0)
 997                                 fimc->source_subdev_grp_id = sd->grp_id;
 998                         else
 999                                 ret = -EBUSY;
1000                 } else {
1001                         fimc->source_subdev_grp_id = 0;
1002                         fimc->sensor = NULL;
1003                 }
1004                 break;
1005
1006         case FLITE_SD_PAD_SOURCE_DMA:
1007                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1008                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1009                 else
1010                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1011                 break;
1012
1013         case FLITE_SD_PAD_SOURCE_ISP:
1014                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1015                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1016                 else
1017                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1018                 break;
1019
1020         default:
1021                 v4l2_err(sd, "Invalid pad index\n");
1022                 ret = -EINVAL;
1023         }
1024         mb();
1025
1026         return ret;
1027 }
1028
1029 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1030         .link_setup = fimc_lite_link_setup,
1031 };
1032
1033 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1034                                            struct v4l2_subdev_pad_config *cfg,
1035                                            struct v4l2_subdev_mbus_code_enum *code)
1036 {
1037         const struct fimc_fmt *fmt;
1038
1039         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1040         if (!fmt)
1041                 return -EINVAL;
1042         code->code = fmt->mbus_code;
1043         return 0;
1044 }
1045
1046 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1047                 struct v4l2_subdev *sd,
1048                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1049 {
1050         if (pad != FLITE_SD_PAD_SINK)
1051                 pad = FLITE_SD_PAD_SOURCE_DMA;
1052
1053         return v4l2_subdev_get_try_format(sd, cfg, pad);
1054 }
1055
1056 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1057                                     struct v4l2_subdev_pad_config *cfg,
1058                                     struct v4l2_subdev_format *fmt)
1059 {
1060         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1061         struct v4l2_mbus_framefmt *mf = &fmt->format;
1062         struct flite_frame *f = &fimc->inp_frame;
1063
1064         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1065                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1066                 fmt->format = *mf;
1067                 return 0;
1068         }
1069
1070         mutex_lock(&fimc->lock);
1071         mf->colorspace = f->fmt->colorspace;
1072         mf->code = f->fmt->mbus_code;
1073
1074         if (fmt->pad == FLITE_SD_PAD_SINK) {
1075                 /* full camera input frame size */
1076                 mf->width = f->f_width;
1077                 mf->height = f->f_height;
1078         } else {
1079                 /* crop size */
1080                 mf->width = f->rect.width;
1081                 mf->height = f->rect.height;
1082         }
1083         mutex_unlock(&fimc->lock);
1084         return 0;
1085 }
1086
1087 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1088                                     struct v4l2_subdev_pad_config *cfg,
1089                                     struct v4l2_subdev_format *fmt)
1090 {
1091         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1092         struct v4l2_mbus_framefmt *mf = &fmt->format;
1093         struct flite_frame *sink = &fimc->inp_frame;
1094         struct flite_frame *source = &fimc->out_frame;
1095         const struct fimc_fmt *ffmt;
1096
1097         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1098                  fmt->pad, mf->code, mf->width, mf->height);
1099
1100         mutex_lock(&fimc->lock);
1101
1102         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1103             sd->entity.stream_count > 0) ||
1104             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1105             vb2_is_busy(&fimc->vb_queue))) {
1106                 mutex_unlock(&fimc->lock);
1107                 return -EBUSY;
1108         }
1109
1110         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1111
1112         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1113                 struct v4l2_mbus_framefmt *src_fmt;
1114
1115                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1116                 *mf = fmt->format;
1117
1118                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1119                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1120                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1121                         *src_fmt = *mf;
1122                 }
1123
1124                 mutex_unlock(&fimc->lock);
1125                 return 0;
1126         }
1127
1128         if (fmt->pad == FLITE_SD_PAD_SINK) {
1129                 sink->f_width = mf->width;
1130                 sink->f_height = mf->height;
1131                 sink->fmt = ffmt;
1132                 /* Set sink crop rectangle */
1133                 sink->rect.width = mf->width;
1134                 sink->rect.height = mf->height;
1135                 sink->rect.left = 0;
1136                 sink->rect.top = 0;
1137                 /* Reset source format and crop rectangle */
1138                 source->rect = sink->rect;
1139                 source->f_width = mf->width;
1140                 source->f_height = mf->height;
1141         }
1142
1143         mutex_unlock(&fimc->lock);
1144         return 0;
1145 }
1146
1147 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1148                                           struct v4l2_subdev_pad_config *cfg,
1149                                           struct v4l2_subdev_selection *sel)
1150 {
1151         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1152         struct flite_frame *f = &fimc->inp_frame;
1153
1154         if ((sel->target != V4L2_SEL_TGT_CROP &&
1155              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1156              sel->pad != FLITE_SD_PAD_SINK)
1157                 return -EINVAL;
1158
1159         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1160                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1161                 return 0;
1162         }
1163
1164         mutex_lock(&fimc->lock);
1165         if (sel->target == V4L2_SEL_TGT_CROP) {
1166                 sel->r = f->rect;
1167         } else {
1168                 sel->r.left = 0;
1169                 sel->r.top = 0;
1170                 sel->r.width = f->f_width;
1171                 sel->r.height = f->f_height;
1172         }
1173         mutex_unlock(&fimc->lock);
1174
1175         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1176                  __func__, f->rect.left, f->rect.top, f->rect.width,
1177                  f->rect.height, f->f_width, f->f_height);
1178
1179         return 0;
1180 }
1181
1182 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1183                                           struct v4l2_subdev_pad_config *cfg,
1184                                           struct v4l2_subdev_selection *sel)
1185 {
1186         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1187         struct flite_frame *f = &fimc->inp_frame;
1188         int ret = 0;
1189
1190         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1191                 return -EINVAL;
1192
1193         mutex_lock(&fimc->lock);
1194         fimc_lite_try_crop(fimc, &sel->r);
1195
1196         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1197                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1198         } else {
1199                 unsigned long flags;
1200                 spin_lock_irqsave(&fimc->slock, flags);
1201                 f->rect = sel->r;
1202                 /* Same crop rectangle on the source pad */
1203                 fimc->out_frame.rect = sel->r;
1204                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1205                 spin_unlock_irqrestore(&fimc->slock, flags);
1206         }
1207         mutex_unlock(&fimc->lock);
1208
1209         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1210                  __func__, f->rect.left, f->rect.top, f->rect.width,
1211                  f->rect.height, f->f_width, f->f_height);
1212
1213         return ret;
1214 }
1215
1216 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1217 {
1218         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1219         unsigned long flags;
1220         int ret;
1221
1222         /*
1223          * Find sensor subdev linked to FIMC-LITE directly or through
1224          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1225          * is used as a subdev only and feeds data internally to FIMC-IS.
1226          * The pipeline links are protected through entity.stream_count
1227          * so there is no need to take the media graph mutex here.
1228          */
1229         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1230
1231         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1232                 return -ENOIOCTLCMD;
1233
1234         mutex_lock(&fimc->lock);
1235         if (on) {
1236                 flite_hw_reset(fimc);
1237                 ret = fimc_lite_hw_init(fimc, true);
1238                 if (!ret) {
1239                         spin_lock_irqsave(&fimc->slock, flags);
1240                         flite_hw_capture_start(fimc);
1241                         spin_unlock_irqrestore(&fimc->slock, flags);
1242                 }
1243         } else {
1244                 set_bit(ST_FLITE_OFF, &fimc->state);
1245
1246                 spin_lock_irqsave(&fimc->slock, flags);
1247                 flite_hw_capture_stop(fimc);
1248                 spin_unlock_irqrestore(&fimc->slock, flags);
1249
1250                 ret = wait_event_timeout(fimc->irq_queue,
1251                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1252                                 msecs_to_jiffies(200));
1253                 if (ret == 0)
1254                         v4l2_err(sd, "s_stream(0) timeout\n");
1255                 clear_bit(ST_FLITE_RUN, &fimc->state);
1256         }
1257
1258         mutex_unlock(&fimc->lock);
1259         return ret;
1260 }
1261
1262 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1263 {
1264         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1265
1266         flite_hw_dump_regs(fimc, __func__);
1267         return 0;
1268 }
1269
1270 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1271 {
1272         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1273         struct vb2_queue *q = &fimc->vb_queue;
1274         struct video_device *vfd = &fimc->ve.vdev;
1275         int ret;
1276
1277         memset(vfd, 0, sizeof(*vfd));
1278         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1279
1280         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1281                  fimc->index);
1282
1283         vfd->fops = &fimc_lite_fops;
1284         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1285         vfd->v4l2_dev = sd->v4l2_dev;
1286         vfd->minor = -1;
1287         vfd->release = video_device_release_empty;
1288         vfd->queue = q;
1289         fimc->reqbufs_count = 0;
1290
1291         INIT_LIST_HEAD(&fimc->pending_buf_q);
1292         INIT_LIST_HEAD(&fimc->active_buf_q);
1293
1294         memset(q, 0, sizeof(*q));
1295         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1296         q->io_modes = VB2_MMAP | VB2_USERPTR;
1297         q->ops = &fimc_lite_qops;
1298         q->mem_ops = &vb2_dma_contig_memops;
1299         q->buf_struct_size = sizeof(struct flite_buffer);
1300         q->drv_priv = fimc;
1301         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1302         q->lock = &fimc->lock;
1303
1304         ret = vb2_queue_init(q);
1305         if (ret < 0)
1306                 return ret;
1307
1308         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1309         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1310         if (ret < 0)
1311                 return ret;
1312
1313         video_set_drvdata(vfd, fimc);
1314         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1315
1316         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1317         if (ret < 0) {
1318                 media_entity_cleanup(&vfd->entity);
1319                 fimc->ve.pipe = NULL;
1320                 return ret;
1321         }
1322
1323         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1324                   vfd->name, video_device_node_name(vfd));
1325         return 0;
1326 }
1327
1328 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1329 {
1330         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1331
1332         if (fimc == NULL)
1333                 return;
1334
1335         mutex_lock(&fimc->lock);
1336
1337         if (video_is_registered(&fimc->ve.vdev)) {
1338                 video_unregister_device(&fimc->ve.vdev);
1339                 media_entity_cleanup(&fimc->ve.vdev.entity);
1340                 fimc->ve.pipe = NULL;
1341         }
1342
1343         mutex_unlock(&fimc->lock);
1344 }
1345
1346 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1347         .registered = fimc_lite_subdev_registered,
1348         .unregistered = fimc_lite_subdev_unregistered,
1349 };
1350
1351 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1352         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1353         .get_selection = fimc_lite_subdev_get_selection,
1354         .set_selection = fimc_lite_subdev_set_selection,
1355         .get_fmt = fimc_lite_subdev_get_fmt,
1356         .set_fmt = fimc_lite_subdev_set_fmt,
1357 };
1358
1359 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1360         .s_stream = fimc_lite_subdev_s_stream,
1361 };
1362
1363 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1364         .log_status = fimc_lite_log_status,
1365 };
1366
1367 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1368         .core = &fimc_lite_core_ops,
1369         .video = &fimc_lite_subdev_video_ops,
1370         .pad = &fimc_lite_subdev_pad_ops,
1371 };
1372
1373 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1374 {
1375         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1376                                               ctrl_handler);
1377         set_bit(ST_FLITE_CONFIG, &fimc->state);
1378         return 0;
1379 }
1380
1381 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1382         .s_ctrl = fimc_lite_s_ctrl,
1383 };
1384
1385 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1386         .ops    = &fimc_lite_ctrl_ops,
1387         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1388         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1389         .name   = "Test Pattern 640x480",
1390         .step   = 1,
1391 };
1392
1393 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1394 {
1395         struct flite_frame *sink = &fimc->inp_frame;
1396         struct flite_frame *source = &fimc->out_frame;
1397
1398         sink->fmt = &fimc_lite_formats[0];
1399         sink->f_width = FLITE_DEFAULT_WIDTH;
1400         sink->f_height = FLITE_DEFAULT_HEIGHT;
1401
1402         sink->rect.width = FLITE_DEFAULT_WIDTH;
1403         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1404         sink->rect.left = 0;
1405         sink->rect.top = 0;
1406
1407         *source = *sink;
1408 }
1409
1410 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1411 {
1412         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1413         struct v4l2_subdev *sd = &fimc->subdev;
1414         int ret;
1415
1416         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1417         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1418         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1419
1420         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1421         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1422         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1423         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1424                                 fimc->subdev_pads);
1425         if (ret)
1426                 return ret;
1427
1428         v4l2_ctrl_handler_init(handler, 1);
1429         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1430                                                   NULL);
1431         if (handler->error) {
1432                 media_entity_cleanup(&sd->entity);
1433                 return handler->error;
1434         }
1435
1436         sd->ctrl_handler = handler;
1437         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1438         sd->entity.ops = &fimc_lite_subdev_media_ops;
1439         sd->owner = THIS_MODULE;
1440         v4l2_set_subdevdata(sd, fimc);
1441
1442         return 0;
1443 }
1444
1445 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1446 {
1447         struct v4l2_subdev *sd = &fimc->subdev;
1448
1449         v4l2_device_unregister_subdev(sd);
1450         media_entity_cleanup(&sd->entity);
1451         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1452         v4l2_set_subdevdata(sd, NULL);
1453 }
1454
1455 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1456 {
1457         if (IS_ERR(fimc->clock))
1458                 return;
1459
1460         clk_unprepare(fimc->clock);
1461         clk_put(fimc->clock);
1462         fimc->clock = ERR_PTR(-EINVAL);
1463 }
1464
1465 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1466 {
1467         int ret;
1468
1469         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1470         if (IS_ERR(fimc->clock))
1471                 return PTR_ERR(fimc->clock);
1472
1473         ret = clk_prepare(fimc->clock);
1474         if (ret < 0) {
1475                 clk_put(fimc->clock);
1476                 fimc->clock = ERR_PTR(-EINVAL);
1477         }
1478         return ret;
1479 }
1480
1481 static const struct of_device_id flite_of_match[];
1482
1483 static int fimc_lite_probe(struct platform_device *pdev)
1484 {
1485         struct flite_drvdata *drv_data = NULL;
1486         struct device *dev = &pdev->dev;
1487         const struct of_device_id *of_id;
1488         struct fimc_lite *fimc;
1489         struct resource *res;
1490         int ret;
1491
1492         if (!dev->of_node)
1493                 return -ENODEV;
1494
1495         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1496         if (!fimc)
1497                 return -ENOMEM;
1498
1499         of_id = of_match_node(flite_of_match, dev->of_node);
1500         if (of_id)
1501                 drv_data = (struct flite_drvdata *)of_id->data;
1502         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1503
1504         if (!drv_data || fimc->index >= drv_data->num_instances ||
1505                                                 fimc->index < 0) {
1506                 dev_err(dev, "Wrong %s node alias\n",
1507                                         dev->of_node->full_name);
1508                 return -EINVAL;
1509         }
1510
1511         fimc->dd = drv_data;
1512         fimc->pdev = pdev;
1513
1514         init_waitqueue_head(&fimc->irq_queue);
1515         spin_lock_init(&fimc->slock);
1516         mutex_init(&fimc->lock);
1517
1518         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1519         fimc->regs = devm_ioremap_resource(dev, res);
1520         if (IS_ERR(fimc->regs))
1521                 return PTR_ERR(fimc->regs);
1522
1523         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1524         if (res == NULL) {
1525                 dev_err(dev, "Failed to get IRQ resource\n");
1526                 return -ENXIO;
1527         }
1528
1529         ret = fimc_lite_clk_get(fimc);
1530         if (ret)
1531                 return ret;
1532
1533         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1534                                0, dev_name(dev), fimc);
1535         if (ret) {
1536                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1537                 goto err_clk_put;
1538         }
1539
1540         /* The video node will be created within the subdev's registered() op */
1541         ret = fimc_lite_create_capture_subdev(fimc);
1542         if (ret)
1543                 goto err_clk_put;
1544
1545         platform_set_drvdata(pdev, fimc);
1546         pm_runtime_enable(dev);
1547
1548         if (!pm_runtime_enabled(dev)) {
1549                 ret = clk_enable(fimc->clock);
1550                 if (ret < 0)
1551                         goto err_sd;
1552         }
1553
1554         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1555         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1556         if (IS_ERR(fimc->alloc_ctx)) {
1557                 ret = PTR_ERR(fimc->alloc_ctx);
1558                 goto err_clk_dis;
1559         }
1560
1561         fimc_lite_set_default_config(fimc);
1562
1563         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1564                 fimc->index);
1565         return 0;
1566
1567 err_clk_dis:
1568         if (!pm_runtime_enabled(dev))
1569                 clk_disable(fimc->clock);
1570 err_sd:
1571         fimc_lite_unregister_capture_subdev(fimc);
1572 err_clk_put:
1573         fimc_lite_clk_put(fimc);
1574         return ret;
1575 }
1576
1577 #ifdef CONFIG_PM
1578 static int fimc_lite_runtime_resume(struct device *dev)
1579 {
1580         struct fimc_lite *fimc = dev_get_drvdata(dev);
1581
1582         clk_enable(fimc->clock);
1583         return 0;
1584 }
1585
1586 static int fimc_lite_runtime_suspend(struct device *dev)
1587 {
1588         struct fimc_lite *fimc = dev_get_drvdata(dev);
1589
1590         clk_disable(fimc->clock);
1591         return 0;
1592 }
1593 #endif
1594
1595 #ifdef CONFIG_PM_SLEEP
1596 static int fimc_lite_resume(struct device *dev)
1597 {
1598         struct fimc_lite *fimc = dev_get_drvdata(dev);
1599         struct flite_buffer *buf;
1600         unsigned long flags;
1601         int i;
1602
1603         spin_lock_irqsave(&fimc->slock, flags);
1604         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1605             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1606                 spin_unlock_irqrestore(&fimc->slock, flags);
1607                 return 0;
1608         }
1609         flite_hw_reset(fimc);
1610         spin_unlock_irqrestore(&fimc->slock, flags);
1611
1612         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1613                 return 0;
1614
1615         INIT_LIST_HEAD(&fimc->active_buf_q);
1616         fimc_pipeline_call(&fimc->ve, open,
1617                            &fimc->ve.vdev.entity, false);
1618         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1619         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1620
1621         for (i = 0; i < fimc->reqbufs_count; i++) {
1622                 if (list_empty(&fimc->pending_buf_q))
1623                         break;
1624                 buf = fimc_lite_pending_queue_pop(fimc);
1625                 buffer_queue(&buf->vb.vb2_buf);
1626         }
1627         return 0;
1628 }
1629
1630 static int fimc_lite_suspend(struct device *dev)
1631 {
1632         struct fimc_lite *fimc = dev_get_drvdata(dev);
1633         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1634         int ret;
1635
1636         if (test_and_set_bit(ST_LPM, &fimc->state))
1637                 return 0;
1638
1639         ret = fimc_lite_stop_capture(fimc, suspend);
1640         if (ret < 0 || !fimc_lite_active(fimc))
1641                 return ret;
1642
1643         return fimc_pipeline_call(&fimc->ve, close);
1644 }
1645 #endif /* CONFIG_PM_SLEEP */
1646
1647 static int fimc_lite_remove(struct platform_device *pdev)
1648 {
1649         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1650         struct device *dev = &pdev->dev;
1651
1652         pm_runtime_disable(dev);
1653         pm_runtime_set_suspended(dev);
1654         fimc_lite_unregister_capture_subdev(fimc);
1655         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1656         vb2_dma_contig_clear_max_seg_size(dev);
1657         fimc_lite_clk_put(fimc);
1658
1659         dev_info(dev, "Driver unloaded\n");
1660         return 0;
1661 }
1662
1663 static const struct dev_pm_ops fimc_lite_pm_ops = {
1664         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1665         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1666                            NULL)
1667 };
1668
1669 /* EXYNOS4212, EXYNOS4412 */
1670 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1671         .max_width              = 8192,
1672         .max_height             = 8192,
1673         .out_width_align        = 8,
1674         .win_hor_offs_align     = 2,
1675         .out_hor_offs_align     = 8,
1676         .max_dma_bufs           = 1,
1677         .num_instances          = 2,
1678 };
1679
1680 /* EXYNOS5250 */
1681 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
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           = 32,
1688         .num_instances          = 3,
1689 };
1690
1691 static const struct of_device_id flite_of_match[] = {
1692         {
1693                 .compatible = "samsung,exynos4212-fimc-lite",
1694                 .data = &fimc_lite_drvdata_exynos4,
1695         },
1696         {
1697                 .compatible = "samsung,exynos5250-fimc-lite",
1698                 .data = &fimc_lite_drvdata_exynos5,
1699         },
1700         { /* sentinel */ },
1701 };
1702 MODULE_DEVICE_TABLE(of, flite_of_match);
1703
1704 static struct platform_driver fimc_lite_driver = {
1705         .probe          = fimc_lite_probe,
1706         .remove         = fimc_lite_remove,
1707         .driver = {
1708                 .of_match_table = flite_of_match,
1709                 .name           = FIMC_LITE_DRV_NAME,
1710                 .pm             = &fimc_lite_pm_ops,
1711         }
1712 };
1713 module_platform_driver(fimc_lite_driver);
1714 MODULE_LICENSE("GPL");
1715 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);