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[], struct device *alloc_devs[])
 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                 return 0;
 378         }
 379
 380         *num_planes = fmt->memplanes;
 381
 382         for (i = 0; i < fmt->memplanes; i++)
 383                 sizes[i] = (wh * fmt->depth[i]) / 8;
 384
 385         return 0;
 386 }
 387
 388 static int buffer_prepare(struct vb2_buffer *vb)
 389 {
 390         struct vb2_queue *vq = vb->vb2_queue;
 391         struct fimc_lite *fimc = vq->drv_priv;
 392         int i;
 393
 394         if (fimc->out_frame.fmt == NULL)
 395                 return -EINVAL;
 396
 397         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 398                 unsigned long size = fimc->payload[i];
 399
 400                 if (vb2_plane_size(vb, i) < size) {
 401                         v4l2_err(&fimc->ve.vdev,
 402                                  "User buffer too small (%ld < %ld)\n",
 403                                  vb2_plane_size(vb, i), size);
 404                         return -EINVAL;
 405                 }
 406                 vb2_set_plane_payload(vb, i, size);
 407         }
 408
 409         return 0;
 410 }
 411
 412 static void buffer_queue(struct vb2_buffer *vb)
 413 {
 414         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 415         struct flite_buffer *buf
 416                 = container_of(vbuf, struct flite_buffer, vb);
 417         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 418         unsigned long flags;
 419
 420         spin_lock_irqsave(&fimc->slock, flags);
 421         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
 422
 423         buf->index = fimc->buf_index++;
 424         if (fimc->buf_index >= fimc->reqbufs_count)
 425                 fimc->buf_index = 0;
 426
 427         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 428             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 429             list_empty(&fimc->active_buf_q)) {
 430                 flite_hw_set_dma_buffer(fimc, buf);
 431                 fimc_lite_active_queue_add(fimc, buf);
 432         } else {
 433                 fimc_lite_pending_queue_add(fimc, buf);
 434         }
 435
 436         if (vb2_is_streaming(&fimc->vb_queue) &&
 437             !list_empty(&fimc->pending_buf_q) &&
 438             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 439                 flite_hw_capture_start(fimc);
 440                 spin_unlock_irqrestore(&fimc->slock, flags);
 441
 442                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 443                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 444                 return;
 445         }
 446         spin_unlock_irqrestore(&fimc->slock, flags);
 447 }
 448
 449 static const struct vb2_ops fimc_lite_qops = {
 450         .queue_setup     = queue_setup,
 451         .buf_prepare     = buffer_prepare,
 452         .buf_queue       = buffer_queue,
 453         .wait_prepare    = vb2_ops_wait_prepare,
 454         .wait_finish     = vb2_ops_wait_finish,
 455         .start_streaming = start_streaming,
 456         .stop_streaming  = stop_streaming,
 457 };
 458
 459 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 460 {
 461         unsigned long flags;
 462
 463         spin_lock_irqsave(&fimc->slock, flags);
 464         memset(&fimc->events, 0, sizeof(fimc->events));
 465         spin_unlock_irqrestore(&fimc->slock, flags);
 466 }
 467
 468 static int fimc_lite_open(struct file *file)
 469 {
 470         struct fimc_lite *fimc = video_drvdata(file);
 471         struct media_entity *me = &fimc->ve.vdev.entity;
 472         int ret;
 473
 474         mutex_lock(&fimc->lock);
 475         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 476                 ret = -EBUSY;
 477                 goto unlock;
 478         }
 479
 480         set_bit(ST_FLITE_IN_USE, &fimc->state);
 481         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 482         if (ret < 0)
 483                 goto err_pm;
 484
 485         ret = v4l2_fh_open(file);
 486         if (ret < 0)
 487                 goto err_pm;
 488
 489         if (!v4l2_fh_is_singular_file(file) ||
 490             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 491                 goto unlock;
 492
 493         mutex_lock(&me->graph_obj.mdev->graph_mutex);
 494
 495         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 496
 497         /* Mark video pipeline ending at this video node as in use. */
 498         if (ret == 0)
 499                 me->use_count++;
 500
 501         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 502
 503         if (!ret) {
 504                 fimc_lite_clear_event_counters(fimc);
 505                 goto unlock;
 506         }
 507
 508         v4l2_fh_release(file);
 509 err_pm:
 510         pm_runtime_put_sync(&fimc->pdev->dev);
 511         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 512 unlock:
 513         mutex_unlock(&fimc->lock);
 514         return ret;
 515 }
 516
 517 static int fimc_lite_release(struct file *file)
 518 {
 519         struct fimc_lite *fimc = video_drvdata(file);
 520         struct media_entity *entity = &fimc->ve.vdev.entity;
 521
 522         mutex_lock(&fimc->lock);
 523
 524         if (v4l2_fh_is_singular_file(file) &&
 525             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 526                 if (fimc->streaming) {
 527                         media_pipeline_stop(entity);
 528                         fimc->streaming = false;
 529                 }
 530                 fimc_lite_stop_capture(fimc, false);
 531                 fimc_pipeline_call(&fimc->ve, close);
 532                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 533
 534                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
 535                 entity->use_count--;
 536                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
 537         }
 538
 539         _vb2_fop_release(file, NULL);
 540         pm_runtime_put(&fimc->pdev->dev);
 541         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 542
 543         mutex_unlock(&fimc->lock);
 544         return 0;
 545 }
 546
 547 static const struct v4l2_file_operations fimc_lite_fops = {
 548         .owner          = THIS_MODULE,
 549         .open           = fimc_lite_open,
 550         .release        = fimc_lite_release,
 551         .poll           = vb2_fop_poll,
 552         .unlocked_ioctl = video_ioctl2,
 553         .mmap           = vb2_fop_mmap,
 554 };
 555
 556 /*
 557  * Format and crop negotiation helpers
 558  */
 559
 560 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 561                                         struct v4l2_subdev_pad_config *cfg,
 562                                         struct v4l2_subdev_format *format)
 563 {
 564         struct flite_drvdata *dd = fimc->dd;
 565         struct v4l2_mbus_framefmt *mf = &format->format;
 566         const struct fimc_fmt *fmt = NULL;
 567
 568         if (format->pad == FLITE_SD_PAD_SINK) {
 569                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 570                                 ffs(dd->out_width_align) - 1,
 571                                 &mf->height, 0, dd->max_height, 0, 0);
 572
 573                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 574                 if (WARN_ON(!fmt))
 575                         return NULL;
 576
 577                 mf->colorspace = fmt->colorspace;
 578                 mf->code = fmt->mbus_code;
 579         } else {
 580                 struct flite_frame *sink = &fimc->inp_frame;
 581                 struct v4l2_mbus_framefmt *sink_fmt;
 582                 struct v4l2_rect *rect;
 583
 584                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 585                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
 586                                                 FLITE_SD_PAD_SINK);
 587
 588                         mf->code = sink_fmt->code;
 589                         mf->colorspace = sink_fmt->colorspace;
 590
 591                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
 592                                                 FLITE_SD_PAD_SINK);
 593                 } else {
 594                         mf->code = sink->fmt->mbus_code;
 595                         mf->colorspace = sink->fmt->colorspace;
 596                         rect = &sink->rect;
 597                 }
 598
 599                 /* Allow changing format only on sink pad */
 600                 mf->width = rect->width;
 601                 mf->height = rect->height;
 602         }
 603
 604         mf->field = V4L2_FIELD_NONE;
 605
 606         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 607                  mf->code, mf->colorspace, mf->width, mf->height);
 608
 609         return fmt;
 610 }
 611
 612 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 613 {
 614         struct flite_frame *frame = &fimc->inp_frame;
 615
 616         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 617                               &r->height, 0, frame->f_height, 0, 0);
 618
 619         /* Adjust left/top if cropping rectangle got out of bounds */
 620         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 621         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 622         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 623
 624         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 625                  r->left, r->top, r->width, r->height,
 626                  frame->f_width, frame->f_height);
 627 }
 628
 629 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 630 {
 631         struct flite_frame *frame = &fimc->out_frame;
 632         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 633
 634         /* Scaling is not supported so we enforce compose rectangle size
 635            same as size of the sink crop rectangle. */
 636         r->width = crop_rect->width;
 637         r->height = crop_rect->height;
 638
 639         /* Adjust left/top if the composing rectangle got out of bounds */
 640         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 641         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 642         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 643
 644         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 645                  r->left, r->top, r->width, r->height,
 646                  frame->f_width, frame->f_height);
 647 }
 648
 649 /*
 650  * Video node ioctl operations
 651  */
 652 static int fimc_lite_querycap(struct file *file, void *priv,
 653                                         struct v4l2_capability *cap)
 654 {
 655         struct fimc_lite *fimc = video_drvdata(file);
 656
 657         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 658         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 659         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 660                                         dev_name(&fimc->pdev->dev));
 661
 662         cap->device_caps = V4L2_CAP_STREAMING;
 663         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 664         return 0;
 665 }
 666
 667 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
 668                                      struct v4l2_fmtdesc *f)
 669 {
 670         const struct fimc_fmt *fmt;
 671
 672         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 673                 return -EINVAL;
 674
 675         fmt = &fimc_lite_formats[f->index];
 676         strlcpy(f->description, fmt->name, sizeof(f->description));
 677         f->pixelformat = fmt->fourcc;
 678
 679         return 0;
 680 }
 681
 682 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 683                                   struct v4l2_format *f)
 684 {
 685         struct fimc_lite *fimc = video_drvdata(file);
 686         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 687         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 688         struct flite_frame *frame = &fimc->out_frame;
 689         const struct fimc_fmt *fmt = frame->fmt;
 690
 691         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 692         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 693
 694         pixm->num_planes = fmt->memplanes;
 695         pixm->pixelformat = fmt->fourcc;
 696         pixm->width = frame->f_width;
 697         pixm->height = frame->f_height;
 698         pixm->field = V4L2_FIELD_NONE;
 699         pixm->colorspace = fmt->colorspace;
 700         return 0;
 701 }
 702
 703 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 704                              struct v4l2_pix_format_mplane *pixm,
 705                              const struct fimc_fmt **ffmt)
 706 {
 707         u32 bpl = pixm->plane_fmt[0].bytesperline;
 708         struct flite_drvdata *dd = fimc->dd;
 709         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 710         const struct fimc_fmt *fmt;
 711
 712         if (WARN_ON(inp_fmt == NULL))
 713                 return -EINVAL;
 714         /*
 715          * We allow some flexibility only for YUV formats. In case of raw
 716          * raw Bayer the FIMC-LITE's output format must match its camera
 717          * interface input format.
 718          */
 719         if (inp_fmt->flags & FMT_FLAGS_YUV)
 720                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 721                                                 inp_fmt->flags, 0);
 722         else
 723                 fmt = inp_fmt;
 724
 725         if (WARN_ON(fmt == NULL))
 726                 return -EINVAL;
 727         if (ffmt)
 728                 *ffmt = fmt;
 729         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 730                               ffs(dd->out_width_align) - 1,
 731                               &pixm->height, 0, dd->max_height, 0, 0);
 732
 733         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 734                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 735                                                    fmt->depth[0]) / 8;
 736
 737         if (pixm->plane_fmt[0].sizeimage == 0)
 738                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 739                                                 fmt->depth[0]) / 8;
 740         pixm->num_planes = fmt->memplanes;
 741         pixm->pixelformat = fmt->fourcc;
 742         pixm->colorspace = fmt->colorspace;
 743         pixm->field = V4L2_FIELD_NONE;
 744         return 0;
 745 }
 746
 747 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 748                                     struct v4l2_format *f)
 749 {
 750         struct fimc_lite *fimc = video_drvdata(file);
 751         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 752 }
 753
 754 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 755                                   struct v4l2_format *f)
 756 {
 757         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 758         struct fimc_lite *fimc = video_drvdata(file);
 759         struct flite_frame *frame = &fimc->out_frame;
 760         const struct fimc_fmt *fmt = NULL;
 761         int ret;
 762
 763         if (vb2_is_busy(&fimc->vb_queue))
 764                 return -EBUSY;
 765
 766         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 767         if (ret < 0)
 768                 return ret;
 769
 770         frame->fmt = fmt;
 771         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 772                                pixm->plane_fmt[0].sizeimage);
 773         frame->f_width = pixm->width;
 774         frame->f_height = pixm->height;
 775
 776         return 0;
 777 }
 778
 779 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 780 {
 781         struct v4l2_subdev *sd = &fimc->subdev;
 782         struct v4l2_subdev_format sink_fmt, src_fmt;
 783         struct media_pad *pad;
 784         int ret;
 785
 786         while (1) {
 787                 /* Retrieve format at the sink pad */
 788                 pad = &sd->entity.pads[0];
 789                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 790                         break;
 791                 /* Don't call FIMC subdev operation to avoid nested locking */
 792                 if (sd == &fimc->subdev) {
 793                         struct flite_frame *ff = &fimc->out_frame;
 794                         sink_fmt.format.width = ff->f_width;
 795                         sink_fmt.format.height = ff->f_height;
 796                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 797                 } else {
 798                         sink_fmt.pad = pad->index;
 799                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 800                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 801                                                &sink_fmt);
 802                         if (ret < 0 && ret != -ENOIOCTLCMD)
 803                                 return -EPIPE;
 804                 }
 805                 /* Retrieve format at the source pad */
 806                 pad = media_entity_remote_pad(pad);
 807                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 808                         break;
 809
 810                 sd = media_entity_to_v4l2_subdev(pad->entity);
 811                 src_fmt.pad = pad->index;
 812                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 813                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 814                 if (ret < 0 && ret != -ENOIOCTLCMD)
 815                         return -EPIPE;
 816
 817                 if (src_fmt.format.width != sink_fmt.format.width ||
 818                     src_fmt.format.height != sink_fmt.format.height ||
 819                     src_fmt.format.code != sink_fmt.format.code)
 820                         return -EPIPE;
 821         }
 822         return 0;
 823 }
 824
 825 static int fimc_lite_streamon(struct file *file, void *priv,
 826                               enum v4l2_buf_type type)
 827 {
 828         struct fimc_lite *fimc = video_drvdata(file);
 829         struct media_entity *entity = &fimc->ve.vdev.entity;
 830         int ret;
 831
 832         if (fimc_lite_active(fimc))
 833                 return -EBUSY;
 834
 835         ret = media_pipeline_start(entity, &fimc->ve.pipe->mp);
 836         if (ret < 0)
 837                 return ret;
 838
 839         ret = fimc_pipeline_validate(fimc);
 840         if (ret < 0)
 841                 goto err_p_stop;
 842
 843         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 844
 845         ret = vb2_ioctl_streamon(file, priv, type);
 846         if (!ret) {
 847                 fimc->streaming = true;
 848                 return ret;
 849         }
 850
 851 err_p_stop:
 852         media_pipeline_stop(entity);
 853         return 0;
 854 }
 855
 856 static int fimc_lite_streamoff(struct file *file, void *priv,
 857                                enum v4l2_buf_type type)
 858 {
 859         struct fimc_lite *fimc = video_drvdata(file);
 860         int ret;
 861
 862         ret = vb2_ioctl_streamoff(file, priv, type);
 863         if (ret < 0)
 864                 return ret;
 865
 866         media_pipeline_stop(&fimc->ve.vdev.entity);
 867         fimc->streaming = false;
 868         return 0;
 869 }
 870
 871 static int fimc_lite_reqbufs(struct file *file, void *priv,
 872                              struct v4l2_requestbuffers *reqbufs)
 873 {
 874         struct fimc_lite *fimc = video_drvdata(file);
 875         int ret;
 876
 877         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 878         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 879         if (!ret)
 880                 fimc->reqbufs_count = reqbufs->count;
 881
 882         return ret;
 883 }
 884
 885 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 886 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
 887 {
 888         if (a->left < b->left || a->top < b->top)
 889                 return 0;
 890         if (a->left + a->width > b->left + b->width)
 891                 return 0;
 892         if (a->top + a->height > b->top + b->height)
 893                 return 0;
 894
 895         return 1;
 896 }
 897
 898 static int fimc_lite_g_selection(struct file *file, void *fh,
 899                                  struct v4l2_selection *sel)
 900 {
 901         struct fimc_lite *fimc = video_drvdata(file);
 902         struct flite_frame *f = &fimc->out_frame;
 903
 904         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 905                 return -EINVAL;
 906
 907         switch (sel->target) {
 908         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 909         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 910                 sel->r.left = 0;
 911                 sel->r.top = 0;
 912                 sel->r.width = f->f_width;
 913                 sel->r.height = f->f_height;
 914                 return 0;
 915
 916         case V4L2_SEL_TGT_COMPOSE:
 917                 sel->r = f->rect;
 918                 return 0;
 919         }
 920
 921         return -EINVAL;
 922 }
 923
 924 static int fimc_lite_s_selection(struct file *file, void *fh,
 925                                  struct v4l2_selection *sel)
 926 {
 927         struct fimc_lite *fimc = video_drvdata(file);
 928         struct flite_frame *f = &fimc->out_frame;
 929         struct v4l2_rect rect = sel->r;
 930         unsigned long flags;
 931
 932         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 933             sel->target != V4L2_SEL_TGT_COMPOSE)
 934                 return -EINVAL;
 935
 936         fimc_lite_try_compose(fimc, &rect);
 937
 938         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 939             !enclosed_rectangle(&rect, &sel->r))
 940                 return -ERANGE;
 941
 942         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 943             !enclosed_rectangle(&sel->r, &rect))
 944                 return -ERANGE;
 945
 946         sel->r = rect;
 947         spin_lock_irqsave(&fimc->slock, flags);
 948         f->rect = rect;
 949         set_bit(ST_FLITE_CONFIG, &fimc->state);
 950         spin_unlock_irqrestore(&fimc->slock, flags);
 951
 952         return 0;
 953 }
 954
 955 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 956         .vidioc_querycap                = fimc_lite_querycap,
 957         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
 958         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 959         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 960         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 961         .vidioc_g_selection             = fimc_lite_g_selection,
 962         .vidioc_s_selection             = fimc_lite_s_selection,
 963         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 964         .vidioc_querybuf                = vb2_ioctl_querybuf,
 965         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 966         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 967         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 968         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 969         .vidioc_streamon                = fimc_lite_streamon,
 970         .vidioc_streamoff               = fimc_lite_streamoff,
 971 };
 972
 973 /* Capture subdev media entity operations */
 974 static int fimc_lite_link_setup(struct media_entity *entity,
 975                                 const struct media_pad *local,
 976                                 const struct media_pad *remote, u32 flags)
 977 {
 978         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 979         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 980         int ret = 0;
 981
 982         if (WARN_ON(fimc == NULL))
 983                 return 0;
 984
 985         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 986                  __func__, remote->entity->name, local->entity->name,
 987                  flags, fimc->source_subdev_grp_id);
 988
 989         switch (local->index) {
 990         case FLITE_SD_PAD_SINK:
 991                 if (flags & MEDIA_LNK_FL_ENABLED) {
 992                         if (fimc->source_subdev_grp_id == 0)
 993                                 fimc->source_subdev_grp_id = sd->grp_id;
 994                         else
 995                                 ret = -EBUSY;
 996                 } else {
 997                         fimc->source_subdev_grp_id = 0;
 998                         fimc->sensor = NULL;
 999                 }
1000                 break;
1001
1002         case FLITE_SD_PAD_SOURCE_DMA:
1003                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1004                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1005                 else
1006                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1007                 break;
1008
1009         case FLITE_SD_PAD_SOURCE_ISP:
1010                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1011                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1012                 else
1013                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1014                 break;
1015
1016         default:
1017                 v4l2_err(sd, "Invalid pad index\n");
1018                 ret = -EINVAL;
1019         }
1020         mb();
1021
1022         return ret;
1023 }
1024
1025 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1026         .link_setup = fimc_lite_link_setup,
1027 };
1028
1029 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1030                                            struct v4l2_subdev_pad_config *cfg,
1031                                            struct v4l2_subdev_mbus_code_enum *code)
1032 {
1033         const struct fimc_fmt *fmt;
1034
1035         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1036         if (!fmt)
1037                 return -EINVAL;
1038         code->code = fmt->mbus_code;
1039         return 0;
1040 }
1041
1042 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1043                 struct v4l2_subdev *sd,
1044                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1045 {
1046         if (pad != FLITE_SD_PAD_SINK)
1047                 pad = FLITE_SD_PAD_SOURCE_DMA;
1048
1049         return v4l2_subdev_get_try_format(sd, cfg, pad);
1050 }
1051
1052 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1053                                     struct v4l2_subdev_pad_config *cfg,
1054                                     struct v4l2_subdev_format *fmt)
1055 {
1056         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1057         struct v4l2_mbus_framefmt *mf = &fmt->format;
1058         struct flite_frame *f = &fimc->inp_frame;
1059
1060         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1061                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1062                 fmt->format = *mf;
1063                 return 0;
1064         }
1065
1066         mutex_lock(&fimc->lock);
1067         mf->colorspace = f->fmt->colorspace;
1068         mf->code = f->fmt->mbus_code;
1069
1070         if (fmt->pad == FLITE_SD_PAD_SINK) {
1071                 /* full camera input frame size */
1072                 mf->width = f->f_width;
1073                 mf->height = f->f_height;
1074         } else {
1075                 /* crop size */
1076                 mf->width = f->rect.width;
1077                 mf->height = f->rect.height;
1078         }
1079         mutex_unlock(&fimc->lock);
1080         return 0;
1081 }
1082
1083 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1084                                     struct v4l2_subdev_pad_config *cfg,
1085                                     struct v4l2_subdev_format *fmt)
1086 {
1087         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1088         struct v4l2_mbus_framefmt *mf = &fmt->format;
1089         struct flite_frame *sink = &fimc->inp_frame;
1090         struct flite_frame *source = &fimc->out_frame;
1091         const struct fimc_fmt *ffmt;
1092
1093         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1094                  fmt->pad, mf->code, mf->width, mf->height);
1095
1096         mutex_lock(&fimc->lock);
1097
1098         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1099             sd->entity.stream_count > 0) ||
1100             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1101             vb2_is_busy(&fimc->vb_queue))) {
1102                 mutex_unlock(&fimc->lock);
1103                 return -EBUSY;
1104         }
1105
1106         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1107
1108         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1109                 struct v4l2_mbus_framefmt *src_fmt;
1110
1111                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1112                 *mf = fmt->format;
1113
1114                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1115                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1116                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1117                         *src_fmt = *mf;
1118                 }
1119
1120                 mutex_unlock(&fimc->lock);
1121                 return 0;
1122         }
1123
1124         if (fmt->pad == FLITE_SD_PAD_SINK) {
1125                 sink->f_width = mf->width;
1126                 sink->f_height = mf->height;
1127                 sink->fmt = ffmt;
1128                 /* Set sink crop rectangle */
1129                 sink->rect.width = mf->width;
1130                 sink->rect.height = mf->height;
1131                 sink->rect.left = 0;
1132                 sink->rect.top = 0;
1133                 /* Reset source format and crop rectangle */
1134                 source->rect = sink->rect;
1135                 source->f_width = mf->width;
1136                 source->f_height = mf->height;
1137         }
1138
1139         mutex_unlock(&fimc->lock);
1140         return 0;
1141 }
1142
1143 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1144                                           struct v4l2_subdev_pad_config *cfg,
1145                                           struct v4l2_subdev_selection *sel)
1146 {
1147         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1148         struct flite_frame *f = &fimc->inp_frame;
1149
1150         if ((sel->target != V4L2_SEL_TGT_CROP &&
1151              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1152              sel->pad != FLITE_SD_PAD_SINK)
1153                 return -EINVAL;
1154
1155         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1156                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1157                 return 0;
1158         }
1159
1160         mutex_lock(&fimc->lock);
1161         if (sel->target == V4L2_SEL_TGT_CROP) {
1162                 sel->r = f->rect;
1163         } else {
1164                 sel->r.left = 0;
1165                 sel->r.top = 0;
1166                 sel->r.width = f->f_width;
1167                 sel->r.height = f->f_height;
1168         }
1169         mutex_unlock(&fimc->lock);
1170
1171         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1172                  __func__, f->rect.left, f->rect.top, f->rect.width,
1173                  f->rect.height, f->f_width, f->f_height);
1174
1175         return 0;
1176 }
1177
1178 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1179                                           struct v4l2_subdev_pad_config *cfg,
1180                                           struct v4l2_subdev_selection *sel)
1181 {
1182         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1183         struct flite_frame *f = &fimc->inp_frame;
1184         int ret = 0;
1185
1186         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1187                 return -EINVAL;
1188
1189         mutex_lock(&fimc->lock);
1190         fimc_lite_try_crop(fimc, &sel->r);
1191
1192         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1193                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1194         } else {
1195                 unsigned long flags;
1196                 spin_lock_irqsave(&fimc->slock, flags);
1197                 f->rect = sel->r;
1198                 /* Same crop rectangle on the source pad */
1199                 fimc->out_frame.rect = sel->r;
1200                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1201                 spin_unlock_irqrestore(&fimc->slock, flags);
1202         }
1203         mutex_unlock(&fimc->lock);
1204
1205         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1206                  __func__, f->rect.left, f->rect.top, f->rect.width,
1207                  f->rect.height, f->f_width, f->f_height);
1208
1209         return ret;
1210 }
1211
1212 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1213 {
1214         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1215         unsigned long flags;
1216         int ret;
1217
1218         /*
1219          * Find sensor subdev linked to FIMC-LITE directly or through
1220          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1221          * is used as a subdev only and feeds data internally to FIMC-IS.
1222          * The pipeline links are protected through entity.stream_count
1223          * so there is no need to take the media graph mutex here.
1224          */
1225         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1226
1227         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1228                 return -ENOIOCTLCMD;
1229
1230         mutex_lock(&fimc->lock);
1231         if (on) {
1232                 flite_hw_reset(fimc);
1233                 ret = fimc_lite_hw_init(fimc, true);
1234                 if (!ret) {
1235                         spin_lock_irqsave(&fimc->slock, flags);
1236                         flite_hw_capture_start(fimc);
1237                         spin_unlock_irqrestore(&fimc->slock, flags);
1238                 }
1239         } else {
1240                 set_bit(ST_FLITE_OFF, &fimc->state);
1241
1242                 spin_lock_irqsave(&fimc->slock, flags);
1243                 flite_hw_capture_stop(fimc);
1244                 spin_unlock_irqrestore(&fimc->slock, flags);
1245
1246                 ret = wait_event_timeout(fimc->irq_queue,
1247                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1248                                 msecs_to_jiffies(200));
1249                 if (ret == 0)
1250                         v4l2_err(sd, "s_stream(0) timeout\n");
1251                 clear_bit(ST_FLITE_RUN, &fimc->state);
1252         }
1253
1254         mutex_unlock(&fimc->lock);
1255         return ret;
1256 }
1257
1258 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1259 {
1260         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1261
1262         flite_hw_dump_regs(fimc, __func__);
1263         return 0;
1264 }
1265
1266 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1267 {
1268         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1269         struct vb2_queue *q = &fimc->vb_queue;
1270         struct video_device *vfd = &fimc->ve.vdev;
1271         int ret;
1272
1273         memset(vfd, 0, sizeof(*vfd));
1274         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1275
1276         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1277                  fimc->index);
1278
1279         vfd->fops = &fimc_lite_fops;
1280         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1281         vfd->v4l2_dev = sd->v4l2_dev;
1282         vfd->minor = -1;
1283         vfd->release = video_device_release_empty;
1284         vfd->queue = q;
1285         fimc->reqbufs_count = 0;
1286
1287         INIT_LIST_HEAD(&fimc->pending_buf_q);
1288         INIT_LIST_HEAD(&fimc->active_buf_q);
1289
1290         memset(q, 0, sizeof(*q));
1291         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1292         q->io_modes = VB2_MMAP | VB2_USERPTR;
1293         q->ops = &fimc_lite_qops;
1294         q->mem_ops = &vb2_dma_contig_memops;
1295         q->buf_struct_size = sizeof(struct flite_buffer);
1296         q->drv_priv = fimc;
1297         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1298         q->lock = &fimc->lock;
1299         q->dev = &fimc->pdev->dev;
1300
1301         ret = vb2_queue_init(q);
1302         if (ret < 0)
1303                 return ret;
1304
1305         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1306         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1307         if (ret < 0)
1308                 return ret;
1309
1310         video_set_drvdata(vfd, fimc);
1311         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1312
1313         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1314         if (ret < 0) {
1315                 media_entity_cleanup(&vfd->entity);
1316                 fimc->ve.pipe = NULL;
1317                 return ret;
1318         }
1319
1320         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1321                   vfd->name, video_device_node_name(vfd));
1322         return 0;
1323 }
1324
1325 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1326 {
1327         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1328
1329         if (fimc == NULL)
1330                 return;
1331
1332         mutex_lock(&fimc->lock);
1333
1334         if (video_is_registered(&fimc->ve.vdev)) {
1335                 video_unregister_device(&fimc->ve.vdev);
1336                 media_entity_cleanup(&fimc->ve.vdev.entity);
1337                 fimc->ve.pipe = NULL;
1338         }
1339
1340         mutex_unlock(&fimc->lock);
1341 }
1342
1343 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1344         .registered = fimc_lite_subdev_registered,
1345         .unregistered = fimc_lite_subdev_unregistered,
1346 };
1347
1348 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1349         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1350         .get_selection = fimc_lite_subdev_get_selection,
1351         .set_selection = fimc_lite_subdev_set_selection,
1352         .get_fmt = fimc_lite_subdev_get_fmt,
1353         .set_fmt = fimc_lite_subdev_set_fmt,
1354 };
1355
1356 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1357         .s_stream = fimc_lite_subdev_s_stream,
1358 };
1359
1360 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1361         .log_status = fimc_lite_log_status,
1362 };
1363
1364 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1365         .core = &fimc_lite_core_ops,
1366         .video = &fimc_lite_subdev_video_ops,
1367         .pad = &fimc_lite_subdev_pad_ops,
1368 };
1369
1370 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1371 {
1372         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1373                                               ctrl_handler);
1374         set_bit(ST_FLITE_CONFIG, &fimc->state);
1375         return 0;
1376 }
1377
1378 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1379         .s_ctrl = fimc_lite_s_ctrl,
1380 };
1381
1382 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1383         .ops    = &fimc_lite_ctrl_ops,
1384         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1385         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1386         .name   = "Test Pattern 640x480",
1387         .step   = 1,
1388 };
1389
1390 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1391 {
1392         struct flite_frame *sink = &fimc->inp_frame;
1393         struct flite_frame *source = &fimc->out_frame;
1394
1395         sink->fmt = &fimc_lite_formats[0];
1396         sink->f_width = FLITE_DEFAULT_WIDTH;
1397         sink->f_height = FLITE_DEFAULT_HEIGHT;
1398
1399         sink->rect.width = FLITE_DEFAULT_WIDTH;
1400         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1401         sink->rect.left = 0;
1402         sink->rect.top = 0;
1403
1404         *source = *sink;
1405 }
1406
1407 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1408 {
1409         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1410         struct v4l2_subdev *sd = &fimc->subdev;
1411         int ret;
1412
1413         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1414         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1415         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1416
1417         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1418         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1419         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1420         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1421                                 fimc->subdev_pads);
1422         if (ret)
1423                 return ret;
1424
1425         v4l2_ctrl_handler_init(handler, 1);
1426         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1427                                                   NULL);
1428         if (handler->error) {
1429                 media_entity_cleanup(&sd->entity);
1430                 return handler->error;
1431         }
1432
1433         sd->ctrl_handler = handler;
1434         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1435         sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1436         sd->entity.ops = &fimc_lite_subdev_media_ops;
1437         sd->owner = THIS_MODULE;
1438         v4l2_set_subdevdata(sd, fimc);
1439
1440         return 0;
1441 }
1442
1443 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1444 {
1445         struct v4l2_subdev *sd = &fimc->subdev;
1446
1447         v4l2_device_unregister_subdev(sd);
1448         media_entity_cleanup(&sd->entity);
1449         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1450         v4l2_set_subdevdata(sd, NULL);
1451 }
1452
1453 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1454 {
1455         if (IS_ERR(fimc->clock))
1456                 return;
1457
1458         clk_put(fimc->clock);
1459         fimc->clock = ERR_PTR(-EINVAL);
1460 }
1461
1462 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1463 {
1464         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1465         if (IS_ERR(fimc->clock))
1466                 return PTR_ERR(fimc->clock);
1467
1468         return 0;
1469 }
1470
1471 static const struct of_device_id flite_of_match[];
1472
1473 static int fimc_lite_probe(struct platform_device *pdev)
1474 {
1475         struct flite_drvdata *drv_data = NULL;
1476         struct device *dev = &pdev->dev;
1477         const struct of_device_id *of_id;
1478         struct fimc_lite *fimc;
1479         struct resource *res;
1480         int ret;
1481
1482         if (!dev->of_node)
1483                 return -ENODEV;
1484
1485         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1486         if (!fimc)
1487                 return -ENOMEM;
1488
1489         of_id = of_match_node(flite_of_match, dev->of_node);
1490         if (of_id)
1491                 drv_data = (struct flite_drvdata *)of_id->data;
1492         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1493
1494         if (!drv_data || fimc->index >= drv_data->num_instances ||
1495                                                 fimc->index < 0) {
1496                 dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1497                 return -EINVAL;
1498         }
1499
1500         fimc->dd = drv_data;
1501         fimc->pdev = pdev;
1502
1503         init_waitqueue_head(&fimc->irq_queue);
1504         spin_lock_init(&fimc->slock);
1505         mutex_init(&fimc->lock);
1506
1507         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1508         fimc->regs = devm_ioremap_resource(dev, res);
1509         if (IS_ERR(fimc->regs))
1510                 return PTR_ERR(fimc->regs);
1511
1512         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1513         if (res == NULL) {
1514                 dev_err(dev, "Failed to get IRQ resource\n");
1515                 return -ENXIO;
1516         }
1517
1518         ret = fimc_lite_clk_get(fimc);
1519         if (ret)
1520                 return ret;
1521
1522         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1523                                0, dev_name(dev), fimc);
1524         if (ret) {
1525                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1526                 goto err_clk_put;
1527         }
1528
1529         /* The video node will be created within the subdev's registered() op */
1530         ret = fimc_lite_create_capture_subdev(fimc);
1531         if (ret)
1532                 goto err_clk_put;
1533
1534         platform_set_drvdata(pdev, fimc);
1535         pm_runtime_enable(dev);
1536
1537         if (!pm_runtime_enabled(dev)) {
1538                 ret = clk_prepare_enable(fimc->clock);
1539                 if (ret < 0)
1540                         goto err_sd;
1541         }
1542
1543         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1544
1545         fimc_lite_set_default_config(fimc);
1546
1547         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1548                 fimc->index);
1549         return 0;
1550
1551 err_sd:
1552         fimc_lite_unregister_capture_subdev(fimc);
1553 err_clk_put:
1554         fimc_lite_clk_put(fimc);
1555         return ret;
1556 }
1557
1558 #ifdef CONFIG_PM
1559 static int fimc_lite_runtime_resume(struct device *dev)
1560 {
1561         struct fimc_lite *fimc = dev_get_drvdata(dev);
1562
1563         clk_prepare_enable(fimc->clock);
1564         return 0;
1565 }
1566
1567 static int fimc_lite_runtime_suspend(struct device *dev)
1568 {
1569         struct fimc_lite *fimc = dev_get_drvdata(dev);
1570
1571         clk_disable_unprepare(fimc->clock);
1572         return 0;
1573 }
1574 #endif
1575
1576 #ifdef CONFIG_PM_SLEEP
1577 static int fimc_lite_resume(struct device *dev)
1578 {
1579         struct fimc_lite *fimc = dev_get_drvdata(dev);
1580         struct flite_buffer *buf;
1581         unsigned long flags;
1582         int i;
1583
1584         spin_lock_irqsave(&fimc->slock, flags);
1585         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1586             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1587                 spin_unlock_irqrestore(&fimc->slock, flags);
1588                 return 0;
1589         }
1590         flite_hw_reset(fimc);
1591         spin_unlock_irqrestore(&fimc->slock, flags);
1592
1593         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1594                 return 0;
1595
1596         INIT_LIST_HEAD(&fimc->active_buf_q);
1597         fimc_pipeline_call(&fimc->ve, open,
1598                            &fimc->ve.vdev.entity, false);
1599         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1600         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1601
1602         for (i = 0; i < fimc->reqbufs_count; i++) {
1603                 if (list_empty(&fimc->pending_buf_q))
1604                         break;
1605                 buf = fimc_lite_pending_queue_pop(fimc);
1606                 buffer_queue(&buf->vb.vb2_buf);
1607         }
1608         return 0;
1609 }
1610
1611 static int fimc_lite_suspend(struct device *dev)
1612 {
1613         struct fimc_lite *fimc = dev_get_drvdata(dev);
1614         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1615         int ret;
1616
1617         if (test_and_set_bit(ST_LPM, &fimc->state))
1618                 return 0;
1619
1620         ret = fimc_lite_stop_capture(fimc, suspend);
1621         if (ret < 0 || !fimc_lite_active(fimc))
1622                 return ret;
1623
1624         return fimc_pipeline_call(&fimc->ve, close);
1625 }
1626 #endif /* CONFIG_PM_SLEEP */
1627
1628 static int fimc_lite_remove(struct platform_device *pdev)
1629 {
1630         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1631         struct device *dev = &pdev->dev;
1632
1633         pm_runtime_disable(dev);
1634         pm_runtime_set_suspended(dev);
1635         fimc_lite_unregister_capture_subdev(fimc);
1636         vb2_dma_contig_clear_max_seg_size(dev);
1637         fimc_lite_clk_put(fimc);
1638
1639         dev_info(dev, "Driver unloaded\n");
1640         return 0;
1641 }
1642
1643 static const struct dev_pm_ops fimc_lite_pm_ops = {
1644         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1645         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1646                            NULL)
1647 };
1648
1649 /* EXYNOS4212, EXYNOS4412 */
1650 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1651         .max_width              = 8192,
1652         .max_height             = 8192,
1653         .out_width_align        = 8,
1654         .win_hor_offs_align     = 2,
1655         .out_hor_offs_align     = 8,
1656         .max_dma_bufs           = 1,
1657         .num_instances          = 2,
1658 };
1659
1660 /* EXYNOS5250 */
1661 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1662         .max_width              = 8192,
1663         .max_height             = 8192,
1664         .out_width_align        = 8,
1665         .win_hor_offs_align     = 2,
1666         .out_hor_offs_align     = 8,
1667         .max_dma_bufs           = 32,
1668         .num_instances          = 3,
1669 };
1670
1671 static const struct of_device_id flite_of_match[] = {
1672         {
1673                 .compatible = "samsung,exynos4212-fimc-lite",
1674                 .data = &fimc_lite_drvdata_exynos4,
1675         },
1676         {
1677                 .compatible = "samsung,exynos5250-fimc-lite",
1678                 .data = &fimc_lite_drvdata_exynos5,
1679         },
1680         { /* sentinel */ },
1681 };
1682 MODULE_DEVICE_TABLE(of, flite_of_match);
1683
1684 static struct platform_driver fimc_lite_driver = {
1685         .probe          = fimc_lite_probe,
1686         .remove         = fimc_lite_remove,
1687         .driver = {
1688                 .of_match_table = flite_of_match,
1689                 .name           = FIMC_LITE_DRV_NAME,
1690                 .pm             = &fimc_lite_pm_ops,
1691         }
1692 };
1693 module_platform_driver(fimc_lite_driver);
1694 MODULE_LICENSE("GPL");
1695 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);