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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Samsung EXYNOS FIMC-LITE (camera host interface) driver
   4 *
   5  * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
   6  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   7  */
   8 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
   9
  10 #include <linux/bug.h>
  11 #include <linux/clk.h>
  12 #include <linux/device.h>
  13 #include <linux/errno.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/kernel.h>
  16 #include <linux/list.h>
  17 #include <linux/module.h>
  18 #include <linux/of.h>
  19 #include <linux/types.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/pm_runtime.h>
  22 #include <linux/slab.h>
  23 #include <linux/videodev2.h>
  24
  25 #include <media/v4l2-device.h>
  26 #include <media/v4l2-ioctl.h>
  27 #include <media/v4l2-mem2mem.h>
  28 #include <media/videobuf2-v4l2.h>
  29 #include <media/videobuf2-dma-contig.h>
  30 #include <media/drv-intf/exynos-fimc.h>
  31
  32 #include "common.h"
  33 #include "fimc-core.h"
  34 #include "fimc-lite.h"
  35 #include "fimc-lite-reg.h"
  36
  37 static int debug;
  38 module_param(debug, int, 0644);
  39
  40 static const struct fimc_fmt fimc_lite_formats[] = {
  41         {
  42                 .name           = "YUV 4:2:2 packed, YCbYCr",
  43                 .fourcc         = V4L2_PIX_FMT_YUYV,
  44                 .colorspace     = V4L2_COLORSPACE_JPEG,
  45                 .depth          = { 16 },
  46                 .color          = FIMC_FMT_YCBYCR422,
  47                 .memplanes      = 1,
  48                 .mbus_code      = MEDIA_BUS_FMT_YUYV8_2X8,
  49                 .flags          = FMT_FLAGS_YUV,
  50         }, {
  51                 .name           = "YUV 4:2:2 packed, CbYCrY",
  52                 .fourcc         = V4L2_PIX_FMT_UYVY,
  53                 .colorspace     = V4L2_COLORSPACE_JPEG,
  54                 .depth          = { 16 },
  55                 .color          = FIMC_FMT_CBYCRY422,
  56                 .memplanes      = 1,
  57                 .mbus_code      = MEDIA_BUS_FMT_UYVY8_2X8,
  58                 .flags          = FMT_FLAGS_YUV,
  59         }, {
  60                 .name           = "YUV 4:2:2 packed, CrYCbY",
  61                 .fourcc         = V4L2_PIX_FMT_VYUY,
  62                 .colorspace     = V4L2_COLORSPACE_JPEG,
  63                 .depth          = { 16 },
  64                 .color          = FIMC_FMT_CRYCBY422,
  65                 .memplanes      = 1,
  66                 .mbus_code      = MEDIA_BUS_FMT_VYUY8_2X8,
  67                 .flags          = FMT_FLAGS_YUV,
  68         }, {
  69                 .name           = "YUV 4:2:2 packed, YCrYCb",
  70                 .fourcc         = V4L2_PIX_FMT_YVYU,
  71                 .colorspace     = V4L2_COLORSPACE_JPEG,
  72                 .depth          = { 16 },
  73                 .color          = FIMC_FMT_YCRYCB422,
  74                 .memplanes      = 1,
  75                 .mbus_code      = MEDIA_BUS_FMT_YVYU8_2X8,
  76                 .flags          = FMT_FLAGS_YUV,
  77         }, {
  78                 .name           = "RAW8 (GRBG)",
  79                 .fourcc         = V4L2_PIX_FMT_SGRBG8,
  80                 .colorspace     = V4L2_COLORSPACE_SRGB,
  81                 .depth          = { 8 },
  82                 .color          = FIMC_FMT_RAW8,
  83                 .memplanes      = 1,
  84                 .mbus_code      = MEDIA_BUS_FMT_SGRBG8_1X8,
  85                 .flags          = FMT_FLAGS_RAW_BAYER,
  86         }, {
  87                 .name           = "RAW10 (GRBG)",
  88                 .fourcc         = V4L2_PIX_FMT_SGRBG10,
  89                 .colorspace     = V4L2_COLORSPACE_SRGB,
  90                 .depth          = { 16 },
  91                 .color          = FIMC_FMT_RAW10,
  92                 .memplanes      = 1,
  93                 .mbus_code      = MEDIA_BUS_FMT_SGRBG10_1X10,
  94                 .flags          = FMT_FLAGS_RAW_BAYER,
  95         }, {
  96                 .name           = "RAW12 (GRBG)",
  97                 .fourcc         = V4L2_PIX_FMT_SGRBG12,
  98                 .colorspace     = V4L2_COLORSPACE_SRGB,
  99                 .depth          = { 16 },
 100                 .color          = FIMC_FMT_RAW12,
 101                 .memplanes      = 1,
 102                 .mbus_code      = MEDIA_BUS_FMT_SGRBG12_1X12,
 103                 .flags          = FMT_FLAGS_RAW_BAYER,
 104         },
 105 };
 106
 107 /**
 108  * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
 109  * @pixelformat: fourcc to match, ignored if null
 110  * @mbus_code: media bus code to match, ignored if null
 111  * @mask: the color format flags to match
 112  * @index: index to the fimc_lite_formats array, ignored if negative
 113  */
 114 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
 115                         const u32 *mbus_code, unsigned int mask, int index)
 116 {
 117         const struct fimc_fmt *fmt, *def_fmt = NULL;
 118         unsigned int i;
 119         int id = 0;
 120
 121         if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
 122                 return NULL;
 123
 124         for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
 125                 fmt = &fimc_lite_formats[i];
 126                 if (mask && !(fmt->flags & mask))
 127                         continue;
 128                 if (pixelformat && fmt->fourcc == *pixelformat)
 129                         return fmt;
 130                 if (mbus_code && fmt->mbus_code == *mbus_code)
 131                         return fmt;
 132                 if (index == id)
 133                         def_fmt = fmt;
 134                 id++;
 135         }
 136         return def_fmt;
 137 }
 138
 139 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
 140 {
 141         struct fimc_source_info *si;
 142         unsigned long flags;
 143
 144         if (fimc->sensor == NULL)
 145                 return -ENXIO;
 146
 147         if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
 148                 return -EINVAL;
 149
 150         /* Get sensor configuration data from the sensor subdev */
 151         si = v4l2_get_subdev_hostdata(fimc->sensor);
 152         if (!si)
 153                 return -EINVAL;
 154
 155         spin_lock_irqsave(&fimc->slock, flags);
 156
 157         flite_hw_set_camera_bus(fimc, si);
 158         flite_hw_set_source_format(fimc, &fimc->inp_frame);
 159         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 160         flite_hw_set_dma_buf_mask(fimc, 0);
 161         flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
 162         flite_hw_set_interrupt_mask(fimc);
 163         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 164
 165         if (debug > 0)
 166                 flite_hw_dump_regs(fimc, __func__);
 167
 168         spin_unlock_irqrestore(&fimc->slock, flags);
 169         return 0;
 170 }
 171
 172 /*
 173  * Reinitialize the driver so it is ready to start the streaming again.
 174  * Set fimc->state to indicate stream off and the hardware shut down state.
 175  * If not suspending (@suspend is false), return any buffers to videobuf2.
 176  * Otherwise put any owned buffers onto the pending buffers queue, so they
 177  * can be re-spun when the device is being resumed. Also perform FIMC
 178  * software reset and disable streaming on the whole pipeline if required.
 179  */
 180 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
 181 {
 182         struct flite_buffer *buf;
 183         unsigned long flags;
 184         bool streaming;
 185
 186         spin_lock_irqsave(&fimc->slock, flags);
 187         streaming = fimc->state & (1 << ST_SENSOR_STREAM);
 188
 189         fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
 190                          1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
 191         if (suspend)
 192                 fimc->state |= (1 << ST_FLITE_SUSPENDED);
 193         else
 194                 fimc->state &= ~(1 << ST_FLITE_PENDING |
 195                                  1 << ST_FLITE_SUSPENDED);
 196
 197         /* Release unused buffers */
 198         while (!suspend && !list_empty(&fimc->pending_buf_q)) {
 199                 buf = fimc_lite_pending_queue_pop(fimc);
 200                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 201         }
 202         /* If suspending put unused buffers onto pending queue */
 203         while (!list_empty(&fimc->active_buf_q)) {
 204                 buf = fimc_lite_active_queue_pop(fimc);
 205                 if (suspend)
 206                         fimc_lite_pending_queue_add(fimc, buf);
 207                 else
 208                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 209         }
 210
 211         spin_unlock_irqrestore(&fimc->slock, flags);
 212
 213         flite_hw_reset(fimc);
 214
 215         if (!streaming)
 216                 return 0;
 217
 218         return fimc_pipeline_call(&fimc->ve, set_stream, 0);
 219 }
 220
 221 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
 222 {
 223         unsigned long flags;
 224
 225         if (!fimc_lite_active(fimc))
 226                 return 0;
 227
 228         spin_lock_irqsave(&fimc->slock, flags);
 229         set_bit(ST_FLITE_OFF, &fimc->state);
 230         flite_hw_capture_stop(fimc);
 231         spin_unlock_irqrestore(&fimc->slock, flags);
 232
 233         wait_event_timeout(fimc->irq_queue,
 234                            !test_bit(ST_FLITE_OFF, &fimc->state),
 235                            (2*HZ/10)); /* 200 ms */
 236
 237         return fimc_lite_reinit(fimc, suspend);
 238 }
 239
 240 /* Must be called  with fimc.slock spinlock held. */
 241 static void fimc_lite_config_update(struct fimc_lite *fimc)
 242 {
 243         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 244         flite_hw_set_dma_window(fimc, &fimc->out_frame);
 245         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 246         clear_bit(ST_FLITE_CONFIG, &fimc->state);
 247 }
 248
 249 static irqreturn_t flite_irq_handler(int irq, void *priv)
 250 {
 251         struct fimc_lite *fimc = priv;
 252         struct flite_buffer *vbuf;
 253         unsigned long flags;
 254         u32 intsrc;
 255
 256         spin_lock_irqsave(&fimc->slock, flags);
 257
 258         intsrc = flite_hw_get_interrupt_source(fimc);
 259         flite_hw_clear_pending_irq(fimc);
 260
 261         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
 262                 wake_up(&fimc->irq_queue);
 263                 goto done;
 264         }
 265
 266         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
 267                 clear_bit(ST_FLITE_RUN, &fimc->state);
 268                 fimc->events.data_overflow++;
 269         }
 270
 271         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
 272                 flite_hw_clear_last_capture_end(fimc);
 273                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 274                 wake_up(&fimc->irq_queue);
 275         }
 276
 277         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 278                 goto done;
 279
 280         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
 281             test_bit(ST_FLITE_RUN, &fimc->state) &&
 282             !list_empty(&fimc->pending_buf_q)) {
 283                 vbuf = fimc_lite_pending_queue_pop(fimc);
 284                 flite_hw_set_dma_buffer(fimc, vbuf);
 285                 fimc_lite_active_queue_add(fimc, vbuf);
 286         }
 287
 288         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
 289             test_bit(ST_FLITE_RUN, &fimc->state) &&
 290             !list_empty(&fimc->active_buf_q)) {
 291                 vbuf = fimc_lite_active_queue_pop(fimc);
 292                 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 293                 vbuf->vb.sequence = fimc->frame_count++;
 294                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
 295                 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 296         }
 297
 298         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
 299                 fimc_lite_config_update(fimc);
 300
 301         if (list_empty(&fimc->pending_buf_q)) {
 302                 flite_hw_capture_stop(fimc);
 303                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 304         }
 305 done:
 306         set_bit(ST_FLITE_RUN, &fimc->state);
 307         spin_unlock_irqrestore(&fimc->slock, flags);
 308         return IRQ_HANDLED;
 309 }
 310
 311 static int start_streaming(struct vb2_queue *q, unsigned int count)
 312 {
 313         struct fimc_lite *fimc = q->drv_priv;
 314         unsigned long flags;
 315         int ret;
 316
 317         spin_lock_irqsave(&fimc->slock, flags);
 318
 319         fimc->buf_index = 0;
 320         fimc->frame_count = 0;
 321
 322         spin_unlock_irqrestore(&fimc->slock, flags);
 323
 324         ret = fimc_lite_hw_init(fimc, false);
 325         if (ret) {
 326                 fimc_lite_reinit(fimc, false);
 327                 return ret;
 328         }
 329
 330         set_bit(ST_FLITE_PENDING, &fimc->state);
 331
 332         if (!list_empty(&fimc->active_buf_q) &&
 333             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 334                 flite_hw_capture_start(fimc);
 335
 336                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 337                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 338         }
 339         if (debug > 0)
 340                 flite_hw_dump_regs(fimc, __func__);
 341
 342         return 0;
 343 }
 344
 345 static void stop_streaming(struct vb2_queue *q)
 346 {
 347         struct fimc_lite *fimc = q->drv_priv;
 348
 349         if (!fimc_lite_active(fimc))
 350                 return;
 351
 352         fimc_lite_stop_capture(fimc, false);
 353 }
 354
 355 static int queue_setup(struct vb2_queue *vq,
 356                        unsigned int *num_buffers, unsigned int *num_planes,
 357                        unsigned int sizes[], struct device *alloc_devs[])
 358 {
 359         struct fimc_lite *fimc = vq->drv_priv;
 360         struct flite_frame *frame = &fimc->out_frame;
 361         const struct fimc_fmt *fmt = frame->fmt;
 362         unsigned long wh = frame->f_width * frame->f_height;
 363         int i;
 364
 365         if (fmt == NULL)
 366                 return -EINVAL;
 367
 368         if (*num_planes) {
 369                 if (*num_planes != fmt->memplanes)
 370                         return -EINVAL;
 371                 for (i = 0; i < *num_planes; i++)
 372                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
 373                                 return -EINVAL;
 374                 return 0;
 375         }
 376
 377         *num_planes = fmt->memplanes;
 378
 379         for (i = 0; i < fmt->memplanes; i++)
 380                 sizes[i] = (wh * fmt->depth[i]) / 8;
 381
 382         return 0;
 383 }
 384
 385 static int buffer_prepare(struct vb2_buffer *vb)
 386 {
 387         struct vb2_queue *vq = vb->vb2_queue;
 388         struct fimc_lite *fimc = vq->drv_priv;
 389         int i;
 390
 391         if (fimc->out_frame.fmt == NULL)
 392                 return -EINVAL;
 393
 394         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 395                 unsigned long size = fimc->payload[i];
 396
 397                 if (vb2_plane_size(vb, i) < size) {
 398                         v4l2_err(&fimc->ve.vdev,
 399                                  "User buffer too small (%ld < %ld)\n",
 400                                  vb2_plane_size(vb, i), size);
 401                         return -EINVAL;
 402                 }
 403                 vb2_set_plane_payload(vb, i, size);
 404         }
 405
 406         return 0;
 407 }
 408
 409 static void buffer_queue(struct vb2_buffer *vb)
 410 {
 411         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 412         struct flite_buffer *buf
 413                 = container_of(vbuf, struct flite_buffer, vb);
 414         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 415         unsigned long flags;
 416
 417         spin_lock_irqsave(&fimc->slock, flags);
 418         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
 419
 420         buf->index = fimc->buf_index++;
 421         if (fimc->buf_index >= fimc->reqbufs_count)
 422                 fimc->buf_index = 0;
 423
 424         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 425             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 426             list_empty(&fimc->active_buf_q)) {
 427                 flite_hw_set_dma_buffer(fimc, buf);
 428                 fimc_lite_active_queue_add(fimc, buf);
 429         } else {
 430                 fimc_lite_pending_queue_add(fimc, buf);
 431         }
 432
 433         if (vb2_is_streaming(&fimc->vb_queue) &&
 434             !list_empty(&fimc->pending_buf_q) &&
 435             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 436                 flite_hw_capture_start(fimc);
 437                 spin_unlock_irqrestore(&fimc->slock, flags);
 438
 439                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 440                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 441                 return;
 442         }
 443         spin_unlock_irqrestore(&fimc->slock, flags);
 444 }
 445
 446 static const struct vb2_ops fimc_lite_qops = {
 447         .queue_setup     = queue_setup,
 448         .buf_prepare     = buffer_prepare,
 449         .buf_queue       = buffer_queue,
 450         .wait_prepare    = vb2_ops_wait_prepare,
 451         .wait_finish     = vb2_ops_wait_finish,
 452         .start_streaming = start_streaming,
 453         .stop_streaming  = stop_streaming,
 454 };
 455
 456 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 457 {
 458         unsigned long flags;
 459
 460         spin_lock_irqsave(&fimc->slock, flags);
 461         memset(&fimc->events, 0, sizeof(fimc->events));
 462         spin_unlock_irqrestore(&fimc->slock, flags);
 463 }
 464
 465 static int fimc_lite_open(struct file *file)
 466 {
 467         struct fimc_lite *fimc = video_drvdata(file);
 468         struct media_entity *me = &fimc->ve.vdev.entity;
 469         int ret;
 470
 471         mutex_lock(&fimc->lock);
 472         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 473                 ret = -EBUSY;
 474                 goto unlock;
 475         }
 476
 477         set_bit(ST_FLITE_IN_USE, &fimc->state);
 478         ret = pm_runtime_get_sync(&fimc->pdev->dev);
 479         if (ret < 0)
 480                 goto unlock;
 481
 482         ret = v4l2_fh_open(file);
 483         if (ret < 0)
 484                 goto err_pm;
 485
 486         if (!v4l2_fh_is_singular_file(file) ||
 487             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 488                 goto unlock;
 489
 490         mutex_lock(&me->graph_obj.mdev->graph_mutex);
 491
 492         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 493
 494         /* Mark video pipeline ending at this video node as in use. */
 495         if (ret == 0)
 496                 me->use_count++;
 497
 498         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 499
 500         if (!ret) {
 501                 fimc_lite_clear_event_counters(fimc);
 502                 goto unlock;
 503         }
 504
 505         v4l2_fh_release(file);
 506 err_pm:
 507         pm_runtime_put_sync(&fimc->pdev->dev);
 508         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 509 unlock:
 510         mutex_unlock(&fimc->lock);
 511         return ret;
 512 }
 513
 514 static int fimc_lite_release(struct file *file)
 515 {
 516         struct fimc_lite *fimc = video_drvdata(file);
 517         struct media_entity *entity = &fimc->ve.vdev.entity;
 518
 519         mutex_lock(&fimc->lock);
 520
 521         if (v4l2_fh_is_singular_file(file) &&
 522             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 523                 if (fimc->streaming) {
 524                         media_pipeline_stop(entity);
 525                         fimc->streaming = false;
 526                 }
 527                 fimc_lite_stop_capture(fimc, false);
 528                 fimc_pipeline_call(&fimc->ve, close);
 529                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 530
 531                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
 532                 entity->use_count--;
 533                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
 534         }
 535
 536         _vb2_fop_release(file, NULL);
 537         pm_runtime_put(&fimc->pdev->dev);
 538         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 539
 540         mutex_unlock(&fimc->lock);
 541         return 0;
 542 }
 543
 544 static const struct v4l2_file_operations fimc_lite_fops = {
 545         .owner          = THIS_MODULE,
 546         .open           = fimc_lite_open,
 547         .release        = fimc_lite_release,
 548         .poll           = vb2_fop_poll,
 549         .unlocked_ioctl = video_ioctl2,
 550         .mmap           = vb2_fop_mmap,
 551 };
 552
 553 /*
 554  * Format and crop negotiation helpers
 555  */
 556
 557 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 558                                         struct v4l2_subdev_pad_config *cfg,
 559                                         struct v4l2_subdev_format *format)
 560 {
 561         struct flite_drvdata *dd = fimc->dd;
 562         struct v4l2_mbus_framefmt *mf = &format->format;
 563         const struct fimc_fmt *fmt = NULL;
 564
 565         if (format->pad == FLITE_SD_PAD_SINK) {
 566                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 567                                 ffs(dd->out_width_align) - 1,
 568                                 &mf->height, 0, dd->max_height, 0, 0);
 569
 570                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 571                 if (WARN_ON(!fmt))
 572                         return NULL;
 573
 574                 mf->colorspace = fmt->colorspace;
 575                 mf->code = fmt->mbus_code;
 576         } else {
 577                 struct flite_frame *sink = &fimc->inp_frame;
 578                 struct v4l2_mbus_framefmt *sink_fmt;
 579                 struct v4l2_rect *rect;
 580
 581                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 582                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
 583                                                 FLITE_SD_PAD_SINK);
 584
 585                         mf->code = sink_fmt->code;
 586                         mf->colorspace = sink_fmt->colorspace;
 587
 588                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
 589                                                 FLITE_SD_PAD_SINK);
 590                 } else {
 591                         mf->code = sink->fmt->mbus_code;
 592                         mf->colorspace = sink->fmt->colorspace;
 593                         rect = &sink->rect;
 594                 }
 595
 596                 /* Allow changing format only on sink pad */
 597                 mf->width = rect->width;
 598                 mf->height = rect->height;
 599         }
 600
 601         mf->field = V4L2_FIELD_NONE;
 602
 603         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 604                  mf->code, mf->colorspace, mf->width, mf->height);
 605
 606         return fmt;
 607 }
 608
 609 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 610 {
 611         struct flite_frame *frame = &fimc->inp_frame;
 612
 613         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 614                               &r->height, 0, frame->f_height, 0, 0);
 615
 616         /* Adjust left/top if cropping rectangle got out of bounds */
 617         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 618         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 619         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 620
 621         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 622                  r->left, r->top, r->width, r->height,
 623                  frame->f_width, frame->f_height);
 624 }
 625
 626 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 627 {
 628         struct flite_frame *frame = &fimc->out_frame;
 629         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 630
 631         /* Scaling is not supported so we enforce compose rectangle size
 632            same as size of the sink crop rectangle. */
 633         r->width = crop_rect->width;
 634         r->height = crop_rect->height;
 635
 636         /* Adjust left/top if the composing rectangle got out of bounds */
 637         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 638         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 639         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 640
 641         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 642                  r->left, r->top, r->width, r->height,
 643                  frame->f_width, frame->f_height);
 644 }
 645
 646 /*
 647  * Video node ioctl operations
 648  */
 649 static int fimc_lite_querycap(struct file *file, void *priv,
 650                                         struct v4l2_capability *cap)
 651 {
 652         struct fimc_lite *fimc = video_drvdata(file);
 653
 654         strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 655         strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 656         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 657                                         dev_name(&fimc->pdev->dev));
 658         return 0;
 659 }
 660
 661 static int fimc_lite_enum_fmt(struct file *file, void *priv,
 662                               struct v4l2_fmtdesc *f)
 663 {
 664         const struct fimc_fmt *fmt;
 665
 666         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 667                 return -EINVAL;
 668
 669         fmt = &fimc_lite_formats[f->index];
 670         strscpy(f->description, fmt->name, sizeof(f->description));
 671         f->pixelformat = fmt->fourcc;
 672
 673         return 0;
 674 }
 675
 676 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 677                                   struct v4l2_format *f)
 678 {
 679         struct fimc_lite *fimc = video_drvdata(file);
 680         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 681         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 682         struct flite_frame *frame = &fimc->out_frame;
 683         const struct fimc_fmt *fmt = frame->fmt;
 684
 685         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 686         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 687
 688         pixm->num_planes = fmt->memplanes;
 689         pixm->pixelformat = fmt->fourcc;
 690         pixm->width = frame->f_width;
 691         pixm->height = frame->f_height;
 692         pixm->field = V4L2_FIELD_NONE;
 693         pixm->colorspace = fmt->colorspace;
 694         return 0;
 695 }
 696
 697 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 698                              struct v4l2_pix_format_mplane *pixm,
 699                              const struct fimc_fmt **ffmt)
 700 {
 701         u32 bpl = pixm->plane_fmt[0].bytesperline;
 702         struct flite_drvdata *dd = fimc->dd;
 703         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 704         const struct fimc_fmt *fmt;
 705
 706         if (WARN_ON(inp_fmt == NULL))
 707                 return -EINVAL;
 708         /*
 709          * We allow some flexibility only for YUV formats. In case of raw
 710          * raw Bayer the FIMC-LITE's output format must match its camera
 711          * interface input format.
 712          */
 713         if (inp_fmt->flags & FMT_FLAGS_YUV)
 714                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 715                                                 inp_fmt->flags, 0);
 716         else
 717                 fmt = inp_fmt;
 718
 719         if (WARN_ON(fmt == NULL))
 720                 return -EINVAL;
 721         if (ffmt)
 722                 *ffmt = fmt;
 723         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 724                               ffs(dd->out_width_align) - 1,
 725                               &pixm->height, 0, dd->max_height, 0, 0);
 726
 727         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 728                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 729                                                    fmt->depth[0]) / 8;
 730
 731         if (pixm->plane_fmt[0].sizeimage == 0)
 732                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 733                                                 fmt->depth[0]) / 8;
 734         pixm->num_planes = fmt->memplanes;
 735         pixm->pixelformat = fmt->fourcc;
 736         pixm->colorspace = fmt->colorspace;
 737         pixm->field = V4L2_FIELD_NONE;
 738         return 0;
 739 }
 740
 741 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 742                                     struct v4l2_format *f)
 743 {
 744         struct fimc_lite *fimc = video_drvdata(file);
 745         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 746 }
 747
 748 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 749                                   struct v4l2_format *f)
 750 {
 751         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 752         struct fimc_lite *fimc = video_drvdata(file);
 753         struct flite_frame *frame = &fimc->out_frame;
 754         const struct fimc_fmt *fmt = NULL;
 755         int ret;
 756
 757         if (vb2_is_busy(&fimc->vb_queue))
 758                 return -EBUSY;
 759
 760         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 761         if (ret < 0)
 762                 return ret;
 763
 764         frame->fmt = fmt;
 765         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 766                                pixm->plane_fmt[0].sizeimage);
 767         frame->f_width = pixm->width;
 768         frame->f_height = pixm->height;
 769
 770         return 0;
 771 }
 772
 773 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 774 {
 775         struct v4l2_subdev *sd = &fimc->subdev;
 776         struct v4l2_subdev_format sink_fmt, src_fmt;
 777         struct media_pad *pad;
 778         int ret;
 779
 780         while (1) {
 781                 /* Retrieve format at the sink pad */
 782                 pad = &sd->entity.pads[0];
 783                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 784                         break;
 785                 /* Don't call FIMC subdev operation to avoid nested locking */
 786                 if (sd == &fimc->subdev) {
 787                         struct flite_frame *ff = &fimc->out_frame;
 788                         sink_fmt.format.width = ff->f_width;
 789                         sink_fmt.format.height = ff->f_height;
 790                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 791                 } else {
 792                         sink_fmt.pad = pad->index;
 793                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 794                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 795                                                &sink_fmt);
 796                         if (ret < 0 && ret != -ENOIOCTLCMD)
 797                                 return -EPIPE;
 798                 }
 799                 /* Retrieve format at the source pad */
 800                 pad = media_entity_remote_pad(pad);
 801                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 802                         break;
 803
 804                 sd = media_entity_to_v4l2_subdev(pad->entity);
 805                 src_fmt.pad = pad->index;
 806                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 807                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 808                 if (ret < 0 && ret != -ENOIOCTLCMD)
 809                         return -EPIPE;
 810
 811                 if (src_fmt.format.width != sink_fmt.format.width ||
 812                     src_fmt.format.height != sink_fmt.format.height ||
 813                     src_fmt.format.code != sink_fmt.format.code)
 814                         return -EPIPE;
 815         }
 816         return 0;
 817 }
 818
 819 static int fimc_lite_streamon(struct file *file, void *priv,
 820                               enum v4l2_buf_type type)
 821 {
 822         struct fimc_lite *fimc = video_drvdata(file);
 823         struct media_entity *entity = &fimc->ve.vdev.entity;
 824         int ret;
 825
 826         if (fimc_lite_active(fimc))
 827                 return -EBUSY;
 828
 829         ret = media_pipeline_start(entity, &fimc->ve.pipe->mp);
 830         if (ret < 0)
 831                 return ret;
 832
 833         ret = fimc_pipeline_validate(fimc);
 834         if (ret < 0)
 835                 goto err_p_stop;
 836
 837         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 838
 839         ret = vb2_ioctl_streamon(file, priv, type);
 840         if (!ret) {
 841                 fimc->streaming = true;
 842                 return ret;
 843         }
 844
 845 err_p_stop:
 846         media_pipeline_stop(entity);
 847         return 0;
 848 }
 849
 850 static int fimc_lite_streamoff(struct file *file, void *priv,
 851                                enum v4l2_buf_type type)
 852 {
 853         struct fimc_lite *fimc = video_drvdata(file);
 854         int ret;
 855
 856         ret = vb2_ioctl_streamoff(file, priv, type);
 857         if (ret < 0)
 858                 return ret;
 859
 860         media_pipeline_stop(&fimc->ve.vdev.entity);
 861         fimc->streaming = false;
 862         return 0;
 863 }
 864
 865 static int fimc_lite_reqbufs(struct file *file, void *priv,
 866                              struct v4l2_requestbuffers *reqbufs)
 867 {
 868         struct fimc_lite *fimc = video_drvdata(file);
 869         int ret;
 870
 871         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 872         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 873         if (!ret)
 874                 fimc->reqbufs_count = reqbufs->count;
 875
 876         return ret;
 877 }
 878
 879 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 880 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
 881 {
 882         if (a->left < b->left || a->top < b->top)
 883                 return 0;
 884         if (a->left + a->width > b->left + b->width)
 885                 return 0;
 886         if (a->top + a->height > b->top + b->height)
 887                 return 0;
 888
 889         return 1;
 890 }
 891
 892 static int fimc_lite_g_selection(struct file *file, void *fh,
 893                                  struct v4l2_selection *sel)
 894 {
 895         struct fimc_lite *fimc = video_drvdata(file);
 896         struct flite_frame *f = &fimc->out_frame;
 897
 898         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 899                 return -EINVAL;
 900
 901         switch (sel->target) {
 902         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 903         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 904                 sel->r.left = 0;
 905                 sel->r.top = 0;
 906                 sel->r.width = f->f_width;
 907                 sel->r.height = f->f_height;
 908                 return 0;
 909
 910         case V4L2_SEL_TGT_COMPOSE:
 911                 sel->r = f->rect;
 912                 return 0;
 913         }
 914
 915         return -EINVAL;
 916 }
 917
 918 static int fimc_lite_s_selection(struct file *file, void *fh,
 919                                  struct v4l2_selection *sel)
 920 {
 921         struct fimc_lite *fimc = video_drvdata(file);
 922         struct flite_frame *f = &fimc->out_frame;
 923         struct v4l2_rect rect = sel->r;
 924         unsigned long flags;
 925
 926         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 927             sel->target != V4L2_SEL_TGT_COMPOSE)
 928                 return -EINVAL;
 929
 930         fimc_lite_try_compose(fimc, &rect);
 931
 932         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 933             !enclosed_rectangle(&rect, &sel->r))
 934                 return -ERANGE;
 935
 936         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 937             !enclosed_rectangle(&sel->r, &rect))
 938                 return -ERANGE;
 939
 940         sel->r = rect;
 941         spin_lock_irqsave(&fimc->slock, flags);
 942         f->rect = rect;
 943         set_bit(ST_FLITE_CONFIG, &fimc->state);
 944         spin_unlock_irqrestore(&fimc->slock, flags);
 945
 946         return 0;
 947 }
 948
 949 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 950         .vidioc_querycap                = fimc_lite_querycap,
 951         .vidioc_enum_fmt_vid_cap        = fimc_lite_enum_fmt,
 952         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 953         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 954         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 955         .vidioc_g_selection             = fimc_lite_g_selection,
 956         .vidioc_s_selection             = fimc_lite_s_selection,
 957         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 958         .vidioc_querybuf                = vb2_ioctl_querybuf,
 959         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 960         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 961         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 962         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 963         .vidioc_streamon                = fimc_lite_streamon,
 964         .vidioc_streamoff               = fimc_lite_streamoff,
 965 };
 966
 967 /* Capture subdev media entity operations */
 968 static int fimc_lite_link_setup(struct media_entity *entity,
 969                                 const struct media_pad *local,
 970                                 const struct media_pad *remote, u32 flags)
 971 {
 972         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 973         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 974         int ret = 0;
 975
 976         if (WARN_ON(fimc == NULL))
 977                 return 0;
 978
 979         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 980                  __func__, remote->entity->name, local->entity->name,
 981                  flags, fimc->source_subdev_grp_id);
 982
 983         switch (local->index) {
 984         case FLITE_SD_PAD_SINK:
 985                 if (flags & MEDIA_LNK_FL_ENABLED) {
 986                         if (fimc->source_subdev_grp_id == 0)
 987                                 fimc->source_subdev_grp_id = sd->grp_id;
 988                         else
 989                                 ret = -EBUSY;
 990                 } else {
 991                         fimc->source_subdev_grp_id = 0;
 992                         fimc->sensor = NULL;
 993                 }
 994                 break;
 995
 996         case FLITE_SD_PAD_SOURCE_DMA:
 997                 if (!(flags & MEDIA_LNK_FL_ENABLED))
 998                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
 999                 else
1000                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1001                 break;
1002
1003         case FLITE_SD_PAD_SOURCE_ISP:
1004                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1005                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1006                 else
1007                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1008                 break;
1009
1010         default:
1011                 v4l2_err(sd, "Invalid pad index\n");
1012                 ret = -EINVAL;
1013         }
1014         mb();
1015
1016         return ret;
1017 }
1018
1019 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1020         .link_setup = fimc_lite_link_setup,
1021 };
1022
1023 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1024                                            struct v4l2_subdev_pad_config *cfg,
1025                                            struct v4l2_subdev_mbus_code_enum *code)
1026 {
1027         const struct fimc_fmt *fmt;
1028
1029         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1030         if (!fmt)
1031                 return -EINVAL;
1032         code->code = fmt->mbus_code;
1033         return 0;
1034 }
1035
1036 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1037                 struct v4l2_subdev *sd,
1038                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1039 {
1040         if (pad != FLITE_SD_PAD_SINK)
1041                 pad = FLITE_SD_PAD_SOURCE_DMA;
1042
1043         return v4l2_subdev_get_try_format(sd, cfg, pad);
1044 }
1045
1046 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1047                                     struct v4l2_subdev_pad_config *cfg,
1048                                     struct v4l2_subdev_format *fmt)
1049 {
1050         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1051         struct v4l2_mbus_framefmt *mf = &fmt->format;
1052         struct flite_frame *f = &fimc->inp_frame;
1053
1054         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1055                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1056                 fmt->format = *mf;
1057                 return 0;
1058         }
1059
1060         mutex_lock(&fimc->lock);
1061         mf->colorspace = f->fmt->colorspace;
1062         mf->code = f->fmt->mbus_code;
1063
1064         if (fmt->pad == FLITE_SD_PAD_SINK) {
1065                 /* full camera input frame size */
1066                 mf->width = f->f_width;
1067                 mf->height = f->f_height;
1068         } else {
1069                 /* crop size */
1070                 mf->width = f->rect.width;
1071                 mf->height = f->rect.height;
1072         }
1073         mutex_unlock(&fimc->lock);
1074         return 0;
1075 }
1076
1077 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1078                                     struct v4l2_subdev_pad_config *cfg,
1079                                     struct v4l2_subdev_format *fmt)
1080 {
1081         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1082         struct v4l2_mbus_framefmt *mf = &fmt->format;
1083         struct flite_frame *sink = &fimc->inp_frame;
1084         struct flite_frame *source = &fimc->out_frame;
1085         const struct fimc_fmt *ffmt;
1086
1087         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1088                  fmt->pad, mf->code, mf->width, mf->height);
1089
1090         mutex_lock(&fimc->lock);
1091
1092         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1093             sd->entity.stream_count > 0) ||
1094             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1095             vb2_is_busy(&fimc->vb_queue))) {
1096                 mutex_unlock(&fimc->lock);
1097                 return -EBUSY;
1098         }
1099
1100         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1101
1102         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1103                 struct v4l2_mbus_framefmt *src_fmt;
1104
1105                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1106                 *mf = fmt->format;
1107
1108                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1109                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1110                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1111                         *src_fmt = *mf;
1112                 }
1113
1114                 mutex_unlock(&fimc->lock);
1115                 return 0;
1116         }
1117
1118         if (fmt->pad == FLITE_SD_PAD_SINK) {
1119                 sink->f_width = mf->width;
1120                 sink->f_height = mf->height;
1121                 sink->fmt = ffmt;
1122                 /* Set sink crop rectangle */
1123                 sink->rect.width = mf->width;
1124                 sink->rect.height = mf->height;
1125                 sink->rect.left = 0;
1126                 sink->rect.top = 0;
1127                 /* Reset source format and crop rectangle */
1128                 source->rect = sink->rect;
1129                 source->f_width = mf->width;
1130                 source->f_height = mf->height;
1131         }
1132
1133         mutex_unlock(&fimc->lock);
1134         return 0;
1135 }
1136
1137 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1138                                           struct v4l2_subdev_pad_config *cfg,
1139                                           struct v4l2_subdev_selection *sel)
1140 {
1141         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1142         struct flite_frame *f = &fimc->inp_frame;
1143
1144         if ((sel->target != V4L2_SEL_TGT_CROP &&
1145              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1146              sel->pad != FLITE_SD_PAD_SINK)
1147                 return -EINVAL;
1148
1149         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1150                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1151                 return 0;
1152         }
1153
1154         mutex_lock(&fimc->lock);
1155         if (sel->target == V4L2_SEL_TGT_CROP) {
1156                 sel->r = f->rect;
1157         } else {
1158                 sel->r.left = 0;
1159                 sel->r.top = 0;
1160                 sel->r.width = f->f_width;
1161                 sel->r.height = f->f_height;
1162         }
1163         mutex_unlock(&fimc->lock);
1164
1165         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1166                  __func__, f->rect.left, f->rect.top, f->rect.width,
1167                  f->rect.height, f->f_width, f->f_height);
1168
1169         return 0;
1170 }
1171
1172 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1173                                           struct v4l2_subdev_pad_config *cfg,
1174                                           struct v4l2_subdev_selection *sel)
1175 {
1176         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1177         struct flite_frame *f = &fimc->inp_frame;
1178         int ret = 0;
1179
1180         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1181                 return -EINVAL;
1182
1183         mutex_lock(&fimc->lock);
1184         fimc_lite_try_crop(fimc, &sel->r);
1185
1186         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1187                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1188         } else {
1189                 unsigned long flags;
1190                 spin_lock_irqsave(&fimc->slock, flags);
1191                 f->rect = sel->r;
1192                 /* Same crop rectangle on the source pad */
1193                 fimc->out_frame.rect = sel->r;
1194                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1195                 spin_unlock_irqrestore(&fimc->slock, flags);
1196         }
1197         mutex_unlock(&fimc->lock);
1198
1199         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1200                  __func__, f->rect.left, f->rect.top, f->rect.width,
1201                  f->rect.height, f->f_width, f->f_height);
1202
1203         return ret;
1204 }
1205
1206 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1207 {
1208         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1209         unsigned long flags;
1210         int ret;
1211
1212         /*
1213          * Find sensor subdev linked to FIMC-LITE directly or through
1214          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1215          * is used as a subdev only and feeds data internally to FIMC-IS.
1216          * The pipeline links are protected through entity.stream_count
1217          * so there is no need to take the media graph mutex here.
1218          */
1219         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1220
1221         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1222                 return -ENOIOCTLCMD;
1223
1224         mutex_lock(&fimc->lock);
1225         if (on) {
1226                 flite_hw_reset(fimc);
1227                 ret = fimc_lite_hw_init(fimc, true);
1228                 if (!ret) {
1229                         spin_lock_irqsave(&fimc->slock, flags);
1230                         flite_hw_capture_start(fimc);
1231                         spin_unlock_irqrestore(&fimc->slock, flags);
1232                 }
1233         } else {
1234                 set_bit(ST_FLITE_OFF, &fimc->state);
1235
1236                 spin_lock_irqsave(&fimc->slock, flags);
1237                 flite_hw_capture_stop(fimc);
1238                 spin_unlock_irqrestore(&fimc->slock, flags);
1239
1240                 ret = wait_event_timeout(fimc->irq_queue,
1241                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1242                                 msecs_to_jiffies(200));
1243                 if (ret == 0)
1244                         v4l2_err(sd, "s_stream(0) timeout\n");
1245                 clear_bit(ST_FLITE_RUN, &fimc->state);
1246         }
1247
1248         mutex_unlock(&fimc->lock);
1249         return ret;
1250 }
1251
1252 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1253 {
1254         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1255
1256         flite_hw_dump_regs(fimc, __func__);
1257         return 0;
1258 }
1259
1260 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1261 {
1262         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1263         struct vb2_queue *q = &fimc->vb_queue;
1264         struct video_device *vfd = &fimc->ve.vdev;
1265         int ret;
1266
1267         memset(vfd, 0, sizeof(*vfd));
1268         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1269
1270         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1271                  fimc->index);
1272
1273         vfd->fops = &fimc_lite_fops;
1274         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1275         vfd->v4l2_dev = sd->v4l2_dev;
1276         vfd->minor = -1;
1277         vfd->release = video_device_release_empty;
1278         vfd->queue = q;
1279         vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
1280         fimc->reqbufs_count = 0;
1281
1282         INIT_LIST_HEAD(&fimc->pending_buf_q);
1283         INIT_LIST_HEAD(&fimc->active_buf_q);
1284
1285         memset(q, 0, sizeof(*q));
1286         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1287         q->io_modes = VB2_MMAP | VB2_USERPTR;
1288         q->ops = &fimc_lite_qops;
1289         q->mem_ops = &vb2_dma_contig_memops;
1290         q->buf_struct_size = sizeof(struct flite_buffer);
1291         q->drv_priv = fimc;
1292         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1293         q->lock = &fimc->lock;
1294         q->dev = &fimc->pdev->dev;
1295
1296         ret = vb2_queue_init(q);
1297         if (ret < 0)
1298                 return ret;
1299
1300         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1301         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1302         if (ret < 0)
1303                 return ret;
1304
1305         video_set_drvdata(vfd, fimc);
1306         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1307
1308         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1309         if (ret < 0) {
1310                 media_entity_cleanup(&vfd->entity);
1311                 fimc->ve.pipe = NULL;
1312                 return ret;
1313         }
1314
1315         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1316                   vfd->name, video_device_node_name(vfd));
1317         return 0;
1318 }
1319
1320 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1321 {
1322         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1323
1324         if (fimc == NULL)
1325                 return;
1326
1327         mutex_lock(&fimc->lock);
1328
1329         if (video_is_registered(&fimc->ve.vdev)) {
1330                 video_unregister_device(&fimc->ve.vdev);
1331                 media_entity_cleanup(&fimc->ve.vdev.entity);
1332                 fimc->ve.pipe = NULL;
1333         }
1334
1335         mutex_unlock(&fimc->lock);
1336 }
1337
1338 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1339         .registered = fimc_lite_subdev_registered,
1340         .unregistered = fimc_lite_subdev_unregistered,
1341 };
1342
1343 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1344         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1345         .get_selection = fimc_lite_subdev_get_selection,
1346         .set_selection = fimc_lite_subdev_set_selection,
1347         .get_fmt = fimc_lite_subdev_get_fmt,
1348         .set_fmt = fimc_lite_subdev_set_fmt,
1349 };
1350
1351 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1352         .s_stream = fimc_lite_subdev_s_stream,
1353 };
1354
1355 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1356         .log_status = fimc_lite_log_status,
1357 };
1358
1359 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1360         .core = &fimc_lite_core_ops,
1361         .video = &fimc_lite_subdev_video_ops,
1362         .pad = &fimc_lite_subdev_pad_ops,
1363 };
1364
1365 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1366 {
1367         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1368                                               ctrl_handler);
1369         set_bit(ST_FLITE_CONFIG, &fimc->state);
1370         return 0;
1371 }
1372
1373 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1374         .s_ctrl = fimc_lite_s_ctrl,
1375 };
1376
1377 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1378         .ops    = &fimc_lite_ctrl_ops,
1379         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1380         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1381         .name   = "Test Pattern 640x480",
1382         .step   = 1,
1383 };
1384
1385 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1386 {
1387         struct flite_frame *sink = &fimc->inp_frame;
1388         struct flite_frame *source = &fimc->out_frame;
1389
1390         sink->fmt = &fimc_lite_formats[0];
1391         sink->f_width = FLITE_DEFAULT_WIDTH;
1392         sink->f_height = FLITE_DEFAULT_HEIGHT;
1393
1394         sink->rect.width = FLITE_DEFAULT_WIDTH;
1395         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1396         sink->rect.left = 0;
1397         sink->rect.top = 0;
1398
1399         *source = *sink;
1400 }
1401
1402 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1403 {
1404         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1405         struct v4l2_subdev *sd = &fimc->subdev;
1406         int ret;
1407
1408         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1409         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1410         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1411
1412         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1413         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1414         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1415         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1416                                 fimc->subdev_pads);
1417         if (ret)
1418                 return ret;
1419
1420         v4l2_ctrl_handler_init(handler, 1);
1421         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1422                                                   NULL);
1423         if (handler->error) {
1424                 media_entity_cleanup(&sd->entity);
1425                 return handler->error;
1426         }
1427
1428         sd->ctrl_handler = handler;
1429         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1430         sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1431         sd->entity.ops = &fimc_lite_subdev_media_ops;
1432         sd->owner = THIS_MODULE;
1433         v4l2_set_subdevdata(sd, fimc);
1434
1435         return 0;
1436 }
1437
1438 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1439 {
1440         struct v4l2_subdev *sd = &fimc->subdev;
1441
1442         v4l2_device_unregister_subdev(sd);
1443         media_entity_cleanup(&sd->entity);
1444         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1445         v4l2_set_subdevdata(sd, NULL);
1446 }
1447
1448 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1449 {
1450         if (IS_ERR(fimc->clock))
1451                 return;
1452
1453         clk_put(fimc->clock);
1454         fimc->clock = ERR_PTR(-EINVAL);
1455 }
1456
1457 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1458 {
1459         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1460         return PTR_ERR_OR_ZERO(fimc->clock);
1461 }
1462
1463 static const struct of_device_id flite_of_match[];
1464
1465 static int fimc_lite_probe(struct platform_device *pdev)
1466 {
1467         struct flite_drvdata *drv_data = NULL;
1468         struct device *dev = &pdev->dev;
1469         const struct of_device_id *of_id;
1470         struct fimc_lite *fimc;
1471         struct resource *res;
1472         int ret;
1473
1474         if (!dev->of_node)
1475                 return -ENODEV;
1476
1477         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1478         if (!fimc)
1479                 return -ENOMEM;
1480
1481         of_id = of_match_node(flite_of_match, dev->of_node);
1482         if (of_id)
1483                 drv_data = (struct flite_drvdata *)of_id->data;
1484         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1485
1486         if (!drv_data || fimc->index >= drv_data->num_instances ||
1487                                                 fimc->index < 0) {
1488                 dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1489                 return -EINVAL;
1490         }
1491
1492         fimc->dd = drv_data;
1493         fimc->pdev = pdev;
1494
1495         init_waitqueue_head(&fimc->irq_queue);
1496         spin_lock_init(&fimc->slock);
1497         mutex_init(&fimc->lock);
1498
1499         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1500         fimc->regs = devm_ioremap_resource(dev, res);
1501         if (IS_ERR(fimc->regs))
1502                 return PTR_ERR(fimc->regs);
1503
1504         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1505         if (res == NULL) {
1506                 dev_err(dev, "Failed to get IRQ resource\n");
1507                 return -ENXIO;
1508         }
1509
1510         ret = fimc_lite_clk_get(fimc);
1511         if (ret)
1512                 return ret;
1513
1514         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1515                                0, dev_name(dev), fimc);
1516         if (ret) {
1517                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1518                 goto err_clk_put;
1519         }
1520
1521         /* The video node will be created within the subdev's registered() op */
1522         ret = fimc_lite_create_capture_subdev(fimc);
1523         if (ret)
1524                 goto err_clk_put;
1525
1526         platform_set_drvdata(pdev, fimc);
1527         pm_runtime_enable(dev);
1528
1529         if (!pm_runtime_enabled(dev)) {
1530                 ret = clk_prepare_enable(fimc->clock);
1531                 if (ret < 0)
1532                         goto err_sd;
1533         }
1534
1535         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1536
1537         fimc_lite_set_default_config(fimc);
1538
1539         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1540                 fimc->index);
1541         return 0;
1542
1543 err_sd:
1544         fimc_lite_unregister_capture_subdev(fimc);
1545 err_clk_put:
1546         fimc_lite_clk_put(fimc);
1547         return ret;
1548 }
1549
1550 #ifdef CONFIG_PM
1551 static int fimc_lite_runtime_resume(struct device *dev)
1552 {
1553         struct fimc_lite *fimc = dev_get_drvdata(dev);
1554
1555         clk_prepare_enable(fimc->clock);
1556         return 0;
1557 }
1558
1559 static int fimc_lite_runtime_suspend(struct device *dev)
1560 {
1561         struct fimc_lite *fimc = dev_get_drvdata(dev);
1562
1563         clk_disable_unprepare(fimc->clock);
1564         return 0;
1565 }
1566 #endif
1567
1568 #ifdef CONFIG_PM_SLEEP
1569 static int fimc_lite_resume(struct device *dev)
1570 {
1571         struct fimc_lite *fimc = dev_get_drvdata(dev);
1572         struct flite_buffer *buf;
1573         unsigned long flags;
1574         int i;
1575
1576         spin_lock_irqsave(&fimc->slock, flags);
1577         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1578             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1579                 spin_unlock_irqrestore(&fimc->slock, flags);
1580                 return 0;
1581         }
1582         flite_hw_reset(fimc);
1583         spin_unlock_irqrestore(&fimc->slock, flags);
1584
1585         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1586                 return 0;
1587
1588         INIT_LIST_HEAD(&fimc->active_buf_q);
1589         fimc_pipeline_call(&fimc->ve, open,
1590                            &fimc->ve.vdev.entity, false);
1591         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1592         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1593
1594         for (i = 0; i < fimc->reqbufs_count; i++) {
1595                 if (list_empty(&fimc->pending_buf_q))
1596                         break;
1597                 buf = fimc_lite_pending_queue_pop(fimc);
1598                 buffer_queue(&buf->vb.vb2_buf);
1599         }
1600         return 0;
1601 }
1602
1603 static int fimc_lite_suspend(struct device *dev)
1604 {
1605         struct fimc_lite *fimc = dev_get_drvdata(dev);
1606         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1607         int ret;
1608
1609         if (test_and_set_bit(ST_LPM, &fimc->state))
1610                 return 0;
1611
1612         ret = fimc_lite_stop_capture(fimc, suspend);
1613         if (ret < 0 || !fimc_lite_active(fimc))
1614                 return ret;
1615
1616         return fimc_pipeline_call(&fimc->ve, close);
1617 }
1618 #endif /* CONFIG_PM_SLEEP */
1619
1620 static int fimc_lite_remove(struct platform_device *pdev)
1621 {
1622         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1623         struct device *dev = &pdev->dev;
1624
1625         pm_runtime_disable(dev);
1626         pm_runtime_set_suspended(dev);
1627         fimc_lite_unregister_capture_subdev(fimc);
1628         vb2_dma_contig_clear_max_seg_size(dev);
1629         fimc_lite_clk_put(fimc);
1630
1631         dev_info(dev, "Driver unloaded\n");
1632         return 0;
1633 }
1634
1635 static const struct dev_pm_ops fimc_lite_pm_ops = {
1636         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1637         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1638                            NULL)
1639 };
1640
1641 /* EXYNOS4412 */
1642 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1643         .max_width              = 8192,
1644         .max_height             = 8192,
1645         .out_width_align        = 8,
1646         .win_hor_offs_align     = 2,
1647         .out_hor_offs_align     = 8,
1648         .max_dma_bufs           = 1,
1649         .num_instances          = 2,
1650 };
1651
1652 /* EXYNOS5250 */
1653 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1654         .max_width              = 8192,
1655         .max_height             = 8192,
1656         .out_width_align        = 8,
1657         .win_hor_offs_align     = 2,
1658         .out_hor_offs_align     = 8,
1659         .max_dma_bufs           = 32,
1660         .num_instances          = 3,
1661 };
1662
1663 static const struct of_device_id flite_of_match[] = {
1664         {
1665                 .compatible = "samsung,exynos4212-fimc-lite",
1666                 .data = &fimc_lite_drvdata_exynos4,
1667         },
1668         {
1669                 .compatible = "samsung,exynos5250-fimc-lite",
1670                 .data = &fimc_lite_drvdata_exynos5,
1671         },
1672         { /* sentinel */ },
1673 };
1674 MODULE_DEVICE_TABLE(of, flite_of_match);
1675
1676 static struct platform_driver fimc_lite_driver = {
1677         .probe          = fimc_lite_probe,
1678         .remove         = fimc_lite_remove,
1679         .driver = {
1680                 .of_match_table = flite_of_match,
1681                 .name           = FIMC_LITE_DRV_NAME,
1682                 .pm             = &fimc_lite_pm_ops,
1683         }
1684 };
1685 module_platform_driver(fimc_lite_driver);
1686 MODULE_LICENSE("GPL");
1687 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);