drivers/media/platform/samsung/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/v4l2-rect.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/videobuf2-dma-contig.h>
  31 #include <media/drv-intf/exynos-fimc.h>
  32
  33 #include "common.h"
  34 #include "fimc-core.h"
  35 #include "fimc-lite.h"
  36 #include "fimc-lite-reg.h"
  37
  38 static int debug;
  39 module_param(debug, int, 0644);
  40
  41 static const struct fimc_fmt fimc_lite_formats[] = {
  42         {
  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                 .fourcc         = V4L2_PIX_FMT_UYVY,
  52                 .colorspace     = V4L2_COLORSPACE_JPEG,
  53                 .depth          = { 16 },
  54                 .color          = FIMC_FMT_CBYCRY422,
  55                 .memplanes      = 1,
  56                 .mbus_code      = MEDIA_BUS_FMT_UYVY8_2X8,
  57                 .flags          = FMT_FLAGS_YUV,
  58         }, {
  59                 .fourcc         = V4L2_PIX_FMT_VYUY,
  60                 .colorspace     = V4L2_COLORSPACE_JPEG,
  61                 .depth          = { 16 },
  62                 .color          = FIMC_FMT_CRYCBY422,
  63                 .memplanes      = 1,
  64                 .mbus_code      = MEDIA_BUS_FMT_VYUY8_2X8,
  65                 .flags          = FMT_FLAGS_YUV,
  66         }, {
  67                 .fourcc         = V4L2_PIX_FMT_YVYU,
  68                 .colorspace     = V4L2_COLORSPACE_JPEG,
  69                 .depth          = { 16 },
  70                 .color          = FIMC_FMT_YCRYCB422,
  71                 .memplanes      = 1,
  72                 .mbus_code      = MEDIA_BUS_FMT_YVYU8_2X8,
  73                 .flags          = FMT_FLAGS_YUV,
  74         }, {
  75                 .fourcc         = V4L2_PIX_FMT_SGRBG8,
  76                 .colorspace     = V4L2_COLORSPACE_SRGB,
  77                 .depth          = { 8 },
  78                 .color          = FIMC_FMT_RAW8,
  79                 .memplanes      = 1,
  80                 .mbus_code      = MEDIA_BUS_FMT_SGRBG8_1X8,
  81                 .flags          = FMT_FLAGS_RAW_BAYER,
  82         }, {
  83                 .fourcc         = V4L2_PIX_FMT_SGRBG10,
  84                 .colorspace     = V4L2_COLORSPACE_SRGB,
  85                 .depth          = { 16 },
  86                 .color          = FIMC_FMT_RAW10,
  87                 .memplanes      = 1,
  88                 .mbus_code      = MEDIA_BUS_FMT_SGRBG10_1X10,
  89                 .flags          = FMT_FLAGS_RAW_BAYER,
  90         }, {
  91                 .fourcc         = V4L2_PIX_FMT_SGRBG12,
  92                 .colorspace     = V4L2_COLORSPACE_SRGB,
  93                 .depth          = { 16 },
  94                 .color          = FIMC_FMT_RAW12,
  95                 .memplanes      = 1,
  96                 .mbus_code      = MEDIA_BUS_FMT_SGRBG12_1X12,
  97                 .flags          = FMT_FLAGS_RAW_BAYER,
  98         },
  99 };
 100
 101 /**
 102  * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
 103  * @pixelformat: fourcc to match, ignored if null
 104  * @mbus_code: media bus code to match, ignored if null
 105  * @mask: the color format flags to match
 106  * @index: index to the fimc_lite_formats array, ignored if negative
 107  */
 108 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
 109                         const u32 *mbus_code, unsigned int mask, int index)
 110 {
 111         const struct fimc_fmt *fmt, *def_fmt = NULL;
 112         unsigned int i;
 113         int id = 0;
 114
 115         if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
 116                 return NULL;
 117
 118         for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
 119                 fmt = &fimc_lite_formats[i];
 120                 if (mask && !(fmt->flags & mask))
 121                         continue;
 122                 if (pixelformat && fmt->fourcc == *pixelformat)
 123                         return fmt;
 124                 if (mbus_code && fmt->mbus_code == *mbus_code)
 125                         return fmt;
 126                 if (index == id)
 127                         def_fmt = fmt;
 128                 id++;
 129         }
 130         return def_fmt;
 131 }
 132
 133 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
 134 {
 135         struct fimc_source_info *si;
 136         unsigned long flags;
 137
 138         if (fimc->sensor == NULL)
 139                 return -ENXIO;
 140
 141         if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
 142                 return -EINVAL;
 143
 144         /* Get sensor configuration data from the sensor subdev */
 145         si = v4l2_get_subdev_hostdata(fimc->sensor);
 146         if (!si)
 147                 return -EINVAL;
 148
 149         spin_lock_irqsave(&fimc->slock, flags);
 150
 151         flite_hw_set_camera_bus(fimc, si);
 152         flite_hw_set_source_format(fimc, &fimc->inp_frame);
 153         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 154         flite_hw_set_dma_buf_mask(fimc, 0);
 155         flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
 156         flite_hw_set_interrupt_mask(fimc);
 157         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 158
 159         if (debug > 0)
 160                 flite_hw_dump_regs(fimc, __func__);
 161
 162         spin_unlock_irqrestore(&fimc->slock, flags);
 163         return 0;
 164 }
 165
 166 /*
 167  * Reinitialize the driver so it is ready to start the streaming again.
 168  * Set fimc->state to indicate stream off and the hardware shut down state.
 169  * If not suspending (@suspend is false), return any buffers to videobuf2.
 170  * Otherwise put any owned buffers onto the pending buffers queue, so they
 171  * can be re-spun when the device is being resumed. Also perform FIMC
 172  * software reset and disable streaming on the whole pipeline if required.
 173  */
 174 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
 175 {
 176         struct flite_buffer *buf;
 177         unsigned long flags;
 178         bool streaming;
 179
 180         spin_lock_irqsave(&fimc->slock, flags);
 181         streaming = fimc->state & (1 << ST_SENSOR_STREAM);
 182
 183         fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
 184                          1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
 185         if (suspend)
 186                 fimc->state |= (1 << ST_FLITE_SUSPENDED);
 187         else
 188                 fimc->state &= ~(1 << ST_FLITE_PENDING |
 189                                  1 << ST_FLITE_SUSPENDED);
 190
 191         /* Release unused buffers */
 192         while (!suspend && !list_empty(&fimc->pending_buf_q)) {
 193                 buf = fimc_lite_pending_queue_pop(fimc);
 194                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 195         }
 196         /* If suspending put unused buffers onto pending queue */
 197         while (!list_empty(&fimc->active_buf_q)) {
 198                 buf = fimc_lite_active_queue_pop(fimc);
 199                 if (suspend)
 200                         fimc_lite_pending_queue_add(fimc, buf);
 201                 else
 202                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 203         }
 204
 205         spin_unlock_irqrestore(&fimc->slock, flags);
 206
 207         flite_hw_reset(fimc);
 208
 209         if (!streaming)
 210                 return 0;
 211
 212         return fimc_pipeline_call(&fimc->ve, set_stream, 0);
 213 }
 214
 215 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
 216 {
 217         unsigned long flags;
 218
 219         if (!fimc_lite_active(fimc))
 220                 return 0;
 221
 222         spin_lock_irqsave(&fimc->slock, flags);
 223         set_bit(ST_FLITE_OFF, &fimc->state);
 224         flite_hw_capture_stop(fimc);
 225         spin_unlock_irqrestore(&fimc->slock, flags);
 226
 227         wait_event_timeout(fimc->irq_queue,
 228                            !test_bit(ST_FLITE_OFF, &fimc->state),
 229                            (2*HZ/10)); /* 200 ms */
 230
 231         return fimc_lite_reinit(fimc, suspend);
 232 }
 233
 234 /* Must be called  with fimc.slock spinlock held. */
 235 static void fimc_lite_config_update(struct fimc_lite *fimc)
 236 {
 237         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
 238         flite_hw_set_dma_window(fimc, &fimc->out_frame);
 239         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
 240         clear_bit(ST_FLITE_CONFIG, &fimc->state);
 241 }
 242
 243 static irqreturn_t flite_irq_handler(int irq, void *priv)
 244 {
 245         struct fimc_lite *fimc = priv;
 246         struct flite_buffer *vbuf;
 247         unsigned long flags;
 248         u32 intsrc;
 249
 250         spin_lock_irqsave(&fimc->slock, flags);
 251
 252         intsrc = flite_hw_get_interrupt_source(fimc);
 253         flite_hw_clear_pending_irq(fimc);
 254
 255         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
 256                 wake_up(&fimc->irq_queue);
 257                 goto done;
 258         }
 259
 260         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
 261                 clear_bit(ST_FLITE_RUN, &fimc->state);
 262                 fimc->events.data_overflow++;
 263         }
 264
 265         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
 266                 flite_hw_clear_last_capture_end(fimc);
 267                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 268                 wake_up(&fimc->irq_queue);
 269         }
 270
 271         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 272                 goto done;
 273
 274         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
 275             test_bit(ST_FLITE_RUN, &fimc->state) &&
 276             !list_empty(&fimc->pending_buf_q)) {
 277                 vbuf = fimc_lite_pending_queue_pop(fimc);
 278                 flite_hw_set_dma_buffer(fimc, vbuf);
 279                 fimc_lite_active_queue_add(fimc, vbuf);
 280         }
 281
 282         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
 283             test_bit(ST_FLITE_RUN, &fimc->state) &&
 284             !list_empty(&fimc->active_buf_q)) {
 285                 vbuf = fimc_lite_active_queue_pop(fimc);
 286                 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 287                 vbuf->vb.sequence = fimc->frame_count++;
 288                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
 289                 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 290         }
 291
 292         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
 293                 fimc_lite_config_update(fimc);
 294
 295         if (list_empty(&fimc->pending_buf_q)) {
 296                 flite_hw_capture_stop(fimc);
 297                 clear_bit(ST_FLITE_STREAM, &fimc->state);
 298         }
 299 done:
 300         set_bit(ST_FLITE_RUN, &fimc->state);
 301         spin_unlock_irqrestore(&fimc->slock, flags);
 302         return IRQ_HANDLED;
 303 }
 304
 305 static int start_streaming(struct vb2_queue *q, unsigned int count)
 306 {
 307         struct fimc_lite *fimc = q->drv_priv;
 308         unsigned long flags;
 309         int ret;
 310
 311         spin_lock_irqsave(&fimc->slock, flags);
 312
 313         fimc->buf_index = 0;
 314         fimc->frame_count = 0;
 315
 316         spin_unlock_irqrestore(&fimc->slock, flags);
 317
 318         ret = fimc_lite_hw_init(fimc, false);
 319         if (ret) {
 320                 fimc_lite_reinit(fimc, false);
 321                 return ret;
 322         }
 323
 324         set_bit(ST_FLITE_PENDING, &fimc->state);
 325
 326         if (!list_empty(&fimc->active_buf_q) &&
 327             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 328                 flite_hw_capture_start(fimc);
 329
 330                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 331                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 332         }
 333         if (debug > 0)
 334                 flite_hw_dump_regs(fimc, __func__);
 335
 336         return 0;
 337 }
 338
 339 static void stop_streaming(struct vb2_queue *q)
 340 {
 341         struct fimc_lite *fimc = q->drv_priv;
 342
 343         if (!fimc_lite_active(fimc))
 344                 return;
 345
 346         fimc_lite_stop_capture(fimc, false);
 347 }
 348
 349 static int queue_setup(struct vb2_queue *vq,
 350                        unsigned int *num_buffers, unsigned int *num_planes,
 351                        unsigned int sizes[], struct device *alloc_devs[])
 352 {
 353         struct fimc_lite *fimc = vq->drv_priv;
 354         struct flite_frame *frame = &fimc->out_frame;
 355         const struct fimc_fmt *fmt = frame->fmt;
 356         unsigned long wh = frame->f_width * frame->f_height;
 357         int i;
 358
 359         if (fmt == NULL)
 360                 return -EINVAL;
 361
 362         if (*num_planes) {
 363                 if (*num_planes != fmt->memplanes)
 364                         return -EINVAL;
 365                 for (i = 0; i < *num_planes; i++)
 366                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
 367                                 return -EINVAL;
 368                 return 0;
 369         }
 370
 371         *num_planes = fmt->memplanes;
 372
 373         for (i = 0; i < fmt->memplanes; i++)
 374                 sizes[i] = (wh * fmt->depth[i]) / 8;
 375
 376         return 0;
 377 }
 378
 379 static int buffer_prepare(struct vb2_buffer *vb)
 380 {
 381         struct vb2_queue *vq = vb->vb2_queue;
 382         struct fimc_lite *fimc = vq->drv_priv;
 383         int i;
 384
 385         if (fimc->out_frame.fmt == NULL)
 386                 return -EINVAL;
 387
 388         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
 389                 unsigned long size = fimc->payload[i];
 390
 391                 if (vb2_plane_size(vb, i) < size) {
 392                         v4l2_err(&fimc->ve.vdev,
 393                                  "User buffer too small (%ld < %ld)\n",
 394                                  vb2_plane_size(vb, i), size);
 395                         return -EINVAL;
 396                 }
 397                 vb2_set_plane_payload(vb, i, size);
 398         }
 399
 400         return 0;
 401 }
 402
 403 static void buffer_queue(struct vb2_buffer *vb)
 404 {
 405         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 406         struct flite_buffer *buf
 407                 = container_of(vbuf, struct flite_buffer, vb);
 408         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
 409         unsigned long flags;
 410
 411         spin_lock_irqsave(&fimc->slock, flags);
 412         buf->addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 413
 414         buf->index = fimc->buf_index++;
 415         if (fimc->buf_index >= fimc->reqbufs_count)
 416                 fimc->buf_index = 0;
 417
 418         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
 419             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
 420             list_empty(&fimc->active_buf_q)) {
 421                 flite_hw_set_dma_buffer(fimc, buf);
 422                 fimc_lite_active_queue_add(fimc, buf);
 423         } else {
 424                 fimc_lite_pending_queue_add(fimc, buf);
 425         }
 426
 427         if (vb2_is_streaming(&fimc->vb_queue) &&
 428             !list_empty(&fimc->pending_buf_q) &&
 429             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
 430                 flite_hw_capture_start(fimc);
 431                 spin_unlock_irqrestore(&fimc->slock, flags);
 432
 433                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
 434                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
 435                 return;
 436         }
 437         spin_unlock_irqrestore(&fimc->slock, flags);
 438 }
 439
 440 static const struct vb2_ops fimc_lite_qops = {
 441         .queue_setup     = queue_setup,
 442         .buf_prepare     = buffer_prepare,
 443         .buf_queue       = buffer_queue,
 444         .wait_prepare    = vb2_ops_wait_prepare,
 445         .wait_finish     = vb2_ops_wait_finish,
 446         .start_streaming = start_streaming,
 447         .stop_streaming  = stop_streaming,
 448 };
 449
 450 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
 451 {
 452         unsigned long flags;
 453
 454         spin_lock_irqsave(&fimc->slock, flags);
 455         memset(&fimc->events, 0, sizeof(fimc->events));
 456         spin_unlock_irqrestore(&fimc->slock, flags);
 457 }
 458
 459 static int fimc_lite_open(struct file *file)
 460 {
 461         struct fimc_lite *fimc = video_drvdata(file);
 462         struct media_entity *me = &fimc->ve.vdev.entity;
 463         int ret;
 464
 465         mutex_lock(&fimc->lock);
 466         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
 467                 ret = -EBUSY;
 468                 goto unlock;
 469         }
 470
 471         set_bit(ST_FLITE_IN_USE, &fimc->state);
 472         ret = pm_runtime_resume_and_get(&fimc->pdev->dev);
 473         if (ret < 0)
 474                 goto err_in_use;
 475
 476         ret = v4l2_fh_open(file);
 477         if (ret < 0)
 478                 goto err_pm;
 479
 480         if (!v4l2_fh_is_singular_file(file) ||
 481             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
 482                 goto unlock;
 483
 484         mutex_lock(&me->graph_obj.mdev->graph_mutex);
 485
 486         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
 487
 488         /* Mark video pipeline ending at this video node as in use. */
 489         if (ret == 0)
 490                 me->use_count++;
 491
 492         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 493
 494         if (!ret) {
 495                 fimc_lite_clear_event_counters(fimc);
 496                 goto unlock;
 497         }
 498
 499         v4l2_fh_release(file);
 500 err_pm:
 501         pm_runtime_put_sync(&fimc->pdev->dev);
 502 err_in_use:
 503         clear_bit(ST_FLITE_IN_USE, &fimc->state);
 504 unlock:
 505         mutex_unlock(&fimc->lock);
 506         return ret;
 507 }
 508
 509 static int fimc_lite_release(struct file *file)
 510 {
 511         struct fimc_lite *fimc = video_drvdata(file);
 512         struct media_entity *entity = &fimc->ve.vdev.entity;
 513
 514         mutex_lock(&fimc->lock);
 515
 516         if (v4l2_fh_is_singular_file(file) &&
 517             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
 518                 if (fimc->streaming) {
 519                         video_device_pipeline_stop(&fimc->ve.vdev);
 520                         fimc->streaming = false;
 521                 }
 522                 fimc_lite_stop_capture(fimc, false);
 523                 fimc_pipeline_call(&fimc->ve, close);
 524                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
 525
 526                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
 527                 entity->use_count--;
 528                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
 529         }
 530
 531         _vb2_fop_release(file, NULL);
 532         pm_runtime_put(&fimc->pdev->dev);
 533         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
 534
 535         mutex_unlock(&fimc->lock);
 536         return 0;
 537 }
 538
 539 static const struct v4l2_file_operations fimc_lite_fops = {
 540         .owner          = THIS_MODULE,
 541         .open           = fimc_lite_open,
 542         .release        = fimc_lite_release,
 543         .poll           = vb2_fop_poll,
 544         .unlocked_ioctl = video_ioctl2,
 545         .mmap           = vb2_fop_mmap,
 546 };
 547
 548 /*
 549  * Format and crop negotiation helpers
 550  */
 551
 552 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
 553                                         struct v4l2_subdev_state *sd_state,
 554                                         struct v4l2_subdev_format *format)
 555 {
 556         struct flite_drvdata *dd = fimc->dd;
 557         struct v4l2_mbus_framefmt *mf = &format->format;
 558         const struct fimc_fmt *fmt = NULL;
 559
 560         if (format->pad == FLITE_SD_PAD_SINK) {
 561                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
 562                                 ffs(dd->out_width_align) - 1,
 563                                 &mf->height, 0, dd->max_height, 0, 0);
 564
 565                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
 566                 if (WARN_ON(!fmt))
 567                         return NULL;
 568
 569                 mf->colorspace = fmt->colorspace;
 570                 mf->code = fmt->mbus_code;
 571         } else {
 572                 struct flite_frame *sink = &fimc->inp_frame;
 573                 struct v4l2_mbus_framefmt *sink_fmt;
 574                 struct v4l2_rect *rect;
 575
 576                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 577                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev,
 578                                                               sd_state,
 579                                                               FLITE_SD_PAD_SINK);
 580
 581                         mf->code = sink_fmt->code;
 582                         mf->colorspace = sink_fmt->colorspace;
 583
 584                         rect = v4l2_subdev_get_try_crop(&fimc->subdev,
 585                                                         sd_state,
 586                                                         FLITE_SD_PAD_SINK);
 587                 } else {
 588                         mf->code = sink->fmt->mbus_code;
 589                         mf->colorspace = sink->fmt->colorspace;
 590                         rect = &sink->rect;
 591                 }
 592
 593                 /* Allow changing format only on sink pad */
 594                 mf->width = rect->width;
 595                 mf->height = rect->height;
 596         }
 597
 598         mf->field = V4L2_FIELD_NONE;
 599
 600         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 601                  mf->code, mf->colorspace, mf->width, mf->height);
 602
 603         return fmt;
 604 }
 605
 606 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 607 {
 608         struct flite_frame *frame = &fimc->inp_frame;
 609
 610         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 611                               &r->height, 0, frame->f_height, 0, 0);
 612
 613         /* Adjust left/top if cropping rectangle got out of bounds */
 614         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 615         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 616         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 617
 618         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 619                  r->left, r->top, r->width, r->height,
 620                  frame->f_width, frame->f_height);
 621 }
 622
 623 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 624 {
 625         struct flite_frame *frame = &fimc->out_frame;
 626         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 627
 628         /* Scaling is not supported so we enforce compose rectangle size
 629            same as size of the sink crop rectangle. */
 630         r->width = crop_rect->width;
 631         r->height = crop_rect->height;
 632
 633         /* Adjust left/top if the composing rectangle got out of bounds */
 634         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 635         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 636         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 637
 638         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 639                  r->left, r->top, r->width, r->height,
 640                  frame->f_width, frame->f_height);
 641 }
 642
 643 /*
 644  * Video node ioctl operations
 645  */
 646 static int fimc_lite_querycap(struct file *file, void *priv,
 647                                         struct v4l2_capability *cap)
 648 {
 649         strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 650         strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 651         return 0;
 652 }
 653
 654 static int fimc_lite_enum_fmt(struct file *file, void *priv,
 655                               struct v4l2_fmtdesc *f)
 656 {
 657         const struct fimc_fmt *fmt;
 658
 659         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 660                 return -EINVAL;
 661
 662         fmt = &fimc_lite_formats[f->index];
 663         f->pixelformat = fmt->fourcc;
 664
 665         return 0;
 666 }
 667
 668 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 669                                   struct v4l2_format *f)
 670 {
 671         struct fimc_lite *fimc = video_drvdata(file);
 672         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 673         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 674         struct flite_frame *frame = &fimc->out_frame;
 675         const struct fimc_fmt *fmt = frame->fmt;
 676
 677         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 678         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 679
 680         pixm->num_planes = fmt->memplanes;
 681         pixm->pixelformat = fmt->fourcc;
 682         pixm->width = frame->f_width;
 683         pixm->height = frame->f_height;
 684         pixm->field = V4L2_FIELD_NONE;
 685         pixm->colorspace = fmt->colorspace;
 686         return 0;
 687 }
 688
 689 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 690                              struct v4l2_pix_format_mplane *pixm,
 691                              const struct fimc_fmt **ffmt)
 692 {
 693         u32 bpl = pixm->plane_fmt[0].bytesperline;
 694         struct flite_drvdata *dd = fimc->dd;
 695         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 696         const struct fimc_fmt *fmt;
 697
 698         if (WARN_ON(inp_fmt == NULL))
 699                 return -EINVAL;
 700         /*
 701          * We allow some flexibility only for YUV formats. In case of raw
 702          * raw Bayer the FIMC-LITE's output format must match its camera
 703          * interface input format.
 704          */
 705         if (inp_fmt->flags & FMT_FLAGS_YUV)
 706                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 707                                                 inp_fmt->flags, 0);
 708         else
 709                 fmt = inp_fmt;
 710
 711         if (WARN_ON(fmt == NULL))
 712                 return -EINVAL;
 713         if (ffmt)
 714                 *ffmt = fmt;
 715         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 716                               ffs(dd->out_width_align) - 1,
 717                               &pixm->height, 0, dd->max_height, 0, 0);
 718
 719         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 720                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 721                                                    fmt->depth[0]) / 8;
 722
 723         if (pixm->plane_fmt[0].sizeimage == 0)
 724                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 725                                                 fmt->depth[0]) / 8;
 726         pixm->num_planes = fmt->memplanes;
 727         pixm->pixelformat = fmt->fourcc;
 728         pixm->colorspace = fmt->colorspace;
 729         pixm->field = V4L2_FIELD_NONE;
 730         return 0;
 731 }
 732
 733 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 734                                     struct v4l2_format *f)
 735 {
 736         struct fimc_lite *fimc = video_drvdata(file);
 737         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 738 }
 739
 740 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 741                                   struct v4l2_format *f)
 742 {
 743         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 744         struct fimc_lite *fimc = video_drvdata(file);
 745         struct flite_frame *frame = &fimc->out_frame;
 746         const struct fimc_fmt *fmt = NULL;
 747         int ret;
 748
 749         if (vb2_is_busy(&fimc->vb_queue))
 750                 return -EBUSY;
 751
 752         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 753         if (ret < 0)
 754                 return ret;
 755
 756         frame->fmt = fmt;
 757         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 758                                pixm->plane_fmt[0].sizeimage);
 759         frame->f_width = pixm->width;
 760         frame->f_height = pixm->height;
 761
 762         return 0;
 763 }
 764
 765 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 766 {
 767         struct v4l2_subdev *sd = &fimc->subdev;
 768         struct v4l2_subdev_format sink_fmt = {
 769                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 770         };
 771         struct v4l2_subdev_format src_fmt = {
 772                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 773         };
 774         struct media_pad *pad;
 775         int ret;
 776
 777         while (1) {
 778                 /* Retrieve format at the sink pad */
 779                 pad = &sd->entity.pads[0];
 780                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 781                         break;
 782                 /* Don't call FIMC subdev operation to avoid nested locking */
 783                 if (sd == &fimc->subdev) {
 784                         struct flite_frame *ff = &fimc->out_frame;
 785                         sink_fmt.format.width = ff->f_width;
 786                         sink_fmt.format.height = ff->f_height;
 787                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 788                 } else {
 789                         sink_fmt.pad = pad->index;
 790                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 791                                                &sink_fmt);
 792                         if (ret < 0 && ret != -ENOIOCTLCMD)
 793                                 return -EPIPE;
 794                 }
 795                 /* Retrieve format at the source pad */
 796                 pad = media_pad_remote_pad_first(pad);
 797                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 798                         break;
 799
 800                 sd = media_entity_to_v4l2_subdev(pad->entity);
 801                 src_fmt.pad = pad->index;
 802                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 803                 if (ret < 0 && ret != -ENOIOCTLCMD)
 804                         return -EPIPE;
 805
 806                 if (src_fmt.format.width != sink_fmt.format.width ||
 807                     src_fmt.format.height != sink_fmt.format.height ||
 808                     src_fmt.format.code != sink_fmt.format.code)
 809                         return -EPIPE;
 810         }
 811         return 0;
 812 }
 813
 814 static int fimc_lite_streamon(struct file *file, void *priv,
 815                               enum v4l2_buf_type type)
 816 {
 817         struct fimc_lite *fimc = video_drvdata(file);
 818         int ret;
 819
 820         if (fimc_lite_active(fimc))
 821                 return -EBUSY;
 822
 823         ret = video_device_pipeline_start(&fimc->ve.vdev, &fimc->ve.pipe->mp);
 824         if (ret < 0)
 825                 return ret;
 826
 827         ret = fimc_pipeline_validate(fimc);
 828         if (ret < 0)
 829                 goto err_p_stop;
 830
 831         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 832
 833         ret = vb2_ioctl_streamon(file, priv, type);
 834         if (!ret) {
 835                 fimc->streaming = true;
 836                 return ret;
 837         }
 838
 839 err_p_stop:
 840         video_device_pipeline_stop(&fimc->ve.vdev);
 841         return 0;
 842 }
 843
 844 static int fimc_lite_streamoff(struct file *file, void *priv,
 845                                enum v4l2_buf_type type)
 846 {
 847         struct fimc_lite *fimc = video_drvdata(file);
 848         int ret;
 849
 850         ret = vb2_ioctl_streamoff(file, priv, type);
 851         if (ret < 0)
 852                 return ret;
 853
 854         video_device_pipeline_stop(&fimc->ve.vdev);
 855         fimc->streaming = false;
 856         return 0;
 857 }
 858
 859 static int fimc_lite_reqbufs(struct file *file, void *priv,
 860                              struct v4l2_requestbuffers *reqbufs)
 861 {
 862         struct fimc_lite *fimc = video_drvdata(file);
 863         int ret;
 864
 865         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 866         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 867         if (!ret)
 868                 fimc->reqbufs_count = reqbufs->count;
 869
 870         return ret;
 871 }
 872
 873 static int fimc_lite_g_selection(struct file *file, void *fh,
 874                                  struct v4l2_selection *sel)
 875 {
 876         struct fimc_lite *fimc = video_drvdata(file);
 877         struct flite_frame *f = &fimc->out_frame;
 878
 879         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 880                 return -EINVAL;
 881
 882         switch (sel->target) {
 883         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 884         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 885                 sel->r.left = 0;
 886                 sel->r.top = 0;
 887                 sel->r.width = f->f_width;
 888                 sel->r.height = f->f_height;
 889                 return 0;
 890
 891         case V4L2_SEL_TGT_COMPOSE:
 892                 sel->r = f->rect;
 893                 return 0;
 894         }
 895
 896         return -EINVAL;
 897 }
 898
 899 static int fimc_lite_s_selection(struct file *file, void *fh,
 900                                  struct v4l2_selection *sel)
 901 {
 902         struct fimc_lite *fimc = video_drvdata(file);
 903         struct flite_frame *f = &fimc->out_frame;
 904         struct v4l2_rect rect = sel->r;
 905         unsigned long flags;
 906
 907         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 908             sel->target != V4L2_SEL_TGT_COMPOSE)
 909                 return -EINVAL;
 910
 911         fimc_lite_try_compose(fimc, &rect);
 912
 913         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 914             !v4l2_rect_enclosed(&rect, &sel->r))
 915                 return -ERANGE;
 916
 917         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 918             !v4l2_rect_enclosed(&sel->r, &rect))
 919                 return -ERANGE;
 920
 921         sel->r = rect;
 922         spin_lock_irqsave(&fimc->slock, flags);
 923         f->rect = rect;
 924         set_bit(ST_FLITE_CONFIG, &fimc->state);
 925         spin_unlock_irqrestore(&fimc->slock, flags);
 926
 927         return 0;
 928 }
 929
 930 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 931         .vidioc_querycap                = fimc_lite_querycap,
 932         .vidioc_enum_fmt_vid_cap        = fimc_lite_enum_fmt,
 933         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 934         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 935         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 936         .vidioc_g_selection             = fimc_lite_g_selection,
 937         .vidioc_s_selection             = fimc_lite_s_selection,
 938         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 939         .vidioc_querybuf                = vb2_ioctl_querybuf,
 940         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 941         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 942         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 943         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 944         .vidioc_streamon                = fimc_lite_streamon,
 945         .vidioc_streamoff               = fimc_lite_streamoff,
 946 };
 947
 948 /* Capture subdev media entity operations */
 949 static int fimc_lite_link_setup(struct media_entity *entity,
 950                                 const struct media_pad *local,
 951                                 const struct media_pad *remote, u32 flags)
 952 {
 953         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 954         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 955         int ret = 0;
 956
 957         if (WARN_ON(fimc == NULL))
 958                 return 0;
 959
 960         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 961                  __func__, remote->entity->name, local->entity->name,
 962                  flags, fimc->source_subdev_grp_id);
 963
 964         switch (local->index) {
 965         case FLITE_SD_PAD_SINK:
 966                 if (flags & MEDIA_LNK_FL_ENABLED) {
 967                         if (fimc->source_subdev_grp_id == 0)
 968                                 fimc->source_subdev_grp_id = sd->grp_id;
 969                         else
 970                                 ret = -EBUSY;
 971                 } else {
 972                         fimc->source_subdev_grp_id = 0;
 973                         fimc->sensor = NULL;
 974                 }
 975                 break;
 976
 977         case FLITE_SD_PAD_SOURCE_DMA:
 978                 if (!(flags & MEDIA_LNK_FL_ENABLED))
 979                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
 980                 else
 981                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
 982                 break;
 983
 984         case FLITE_SD_PAD_SOURCE_ISP:
 985                 if (!(flags & MEDIA_LNK_FL_ENABLED))
 986                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
 987                 else
 988                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
 989                 break;
 990
 991         default:
 992                 v4l2_err(sd, "Invalid pad index\n");
 993                 ret = -EINVAL;
 994         }
 995         mb();
 996
 997         return ret;
 998 }
 999
1000 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1001         .link_setup = fimc_lite_link_setup,
1002 };
1003
1004 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1005                                            struct v4l2_subdev_state *sd_state,
1006                                            struct v4l2_subdev_mbus_code_enum *code)
1007 {
1008         const struct fimc_fmt *fmt;
1009
1010         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1011         if (!fmt)
1012                 return -EINVAL;
1013         code->code = fmt->mbus_code;
1014         return 0;
1015 }
1016
1017 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1018                 struct v4l2_subdev *sd,
1019                 struct v4l2_subdev_state *sd_state, unsigned int pad)
1020 {
1021         if (pad != FLITE_SD_PAD_SINK)
1022                 pad = FLITE_SD_PAD_SOURCE_DMA;
1023
1024         return v4l2_subdev_get_try_format(sd, sd_state, pad);
1025 }
1026
1027 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1028                                     struct v4l2_subdev_state *sd_state,
1029                                     struct v4l2_subdev_format *fmt)
1030 {
1031         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1032         struct v4l2_mbus_framefmt *mf = &fmt->format;
1033         struct flite_frame *f = &fimc->inp_frame;
1034
1035         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1036                 mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1037                 fmt->format = *mf;
1038                 return 0;
1039         }
1040
1041         mutex_lock(&fimc->lock);
1042         mf->colorspace = f->fmt->colorspace;
1043         mf->code = f->fmt->mbus_code;
1044
1045         if (fmt->pad == FLITE_SD_PAD_SINK) {
1046                 /* full camera input frame size */
1047                 mf->width = f->f_width;
1048                 mf->height = f->f_height;
1049         } else {
1050                 /* crop size */
1051                 mf->width = f->rect.width;
1052                 mf->height = f->rect.height;
1053         }
1054         mutex_unlock(&fimc->lock);
1055         return 0;
1056 }
1057
1058 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1059                                     struct v4l2_subdev_state *sd_state,
1060                                     struct v4l2_subdev_format *fmt)
1061 {
1062         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1063         struct v4l2_mbus_framefmt *mf = &fmt->format;
1064         struct flite_frame *sink = &fimc->inp_frame;
1065         struct flite_frame *source = &fimc->out_frame;
1066         const struct fimc_fmt *ffmt;
1067
1068         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1069                  fmt->pad, mf->code, mf->width, mf->height);
1070
1071         mutex_lock(&fimc->lock);
1072
1073         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1074             media_entity_is_streaming(&sd->entity)) ||
1075             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1076             vb2_is_busy(&fimc->vb_queue))) {
1077                 mutex_unlock(&fimc->lock);
1078                 return -EBUSY;
1079         }
1080
1081         ffmt = fimc_lite_subdev_try_fmt(fimc, sd_state, fmt);
1082
1083         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1084                 struct v4l2_mbus_framefmt *src_fmt;
1085
1086                 mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1087                 *mf = fmt->format;
1088
1089                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1090                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1091                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, sd_state,
1092                                                                  pad);
1093                         *src_fmt = *mf;
1094                 }
1095
1096                 mutex_unlock(&fimc->lock);
1097                 return 0;
1098         }
1099
1100         if (fmt->pad == FLITE_SD_PAD_SINK) {
1101                 sink->f_width = mf->width;
1102                 sink->f_height = mf->height;
1103                 sink->fmt = ffmt;
1104                 /* Set sink crop rectangle */
1105                 sink->rect.width = mf->width;
1106                 sink->rect.height = mf->height;
1107                 sink->rect.left = 0;
1108                 sink->rect.top = 0;
1109                 /* Reset source format and crop rectangle */
1110                 source->rect = sink->rect;
1111                 source->f_width = mf->width;
1112                 source->f_height = mf->height;
1113         }
1114
1115         mutex_unlock(&fimc->lock);
1116         return 0;
1117 }
1118
1119 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1120                                           struct v4l2_subdev_state *sd_state,
1121                                           struct v4l2_subdev_selection *sel)
1122 {
1123         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1124         struct flite_frame *f = &fimc->inp_frame;
1125
1126         if ((sel->target != V4L2_SEL_TGT_CROP &&
1127              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1128              sel->pad != FLITE_SD_PAD_SINK)
1129                 return -EINVAL;
1130
1131         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1132                 sel->r = *v4l2_subdev_get_try_crop(sd, sd_state, sel->pad);
1133                 return 0;
1134         }
1135
1136         mutex_lock(&fimc->lock);
1137         if (sel->target == V4L2_SEL_TGT_CROP) {
1138                 sel->r = f->rect;
1139         } else {
1140                 sel->r.left = 0;
1141                 sel->r.top = 0;
1142                 sel->r.width = f->f_width;
1143                 sel->r.height = f->f_height;
1144         }
1145         mutex_unlock(&fimc->lock);
1146
1147         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1148                  __func__, f->rect.left, f->rect.top, f->rect.width,
1149                  f->rect.height, f->f_width, f->f_height);
1150
1151         return 0;
1152 }
1153
1154 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1155                                           struct v4l2_subdev_state *sd_state,
1156                                           struct v4l2_subdev_selection *sel)
1157 {
1158         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1159         struct flite_frame *f = &fimc->inp_frame;
1160         int ret = 0;
1161
1162         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1163                 return -EINVAL;
1164
1165         mutex_lock(&fimc->lock);
1166         fimc_lite_try_crop(fimc, &sel->r);
1167
1168         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1169                 *v4l2_subdev_get_try_crop(sd, sd_state, sel->pad) = sel->r;
1170         } else {
1171                 unsigned long flags;
1172                 spin_lock_irqsave(&fimc->slock, flags);
1173                 f->rect = sel->r;
1174                 /* Same crop rectangle on the source pad */
1175                 fimc->out_frame.rect = sel->r;
1176                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1177                 spin_unlock_irqrestore(&fimc->slock, flags);
1178         }
1179         mutex_unlock(&fimc->lock);
1180
1181         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1182                  __func__, f->rect.left, f->rect.top, f->rect.width,
1183                  f->rect.height, f->f_width, f->f_height);
1184
1185         return ret;
1186 }
1187
1188 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1189 {
1190         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1191         unsigned long flags;
1192         int ret;
1193
1194         /*
1195          * Find sensor subdev linked to FIMC-LITE directly or through
1196          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1197          * is used as a subdev only and feeds data internally to FIMC-IS.
1198          * The pipeline links are protected through entity.pipe so there is no
1199          * need to take the media graph mutex here.
1200          */
1201         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1202
1203         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1204                 return -ENOIOCTLCMD;
1205
1206         mutex_lock(&fimc->lock);
1207         if (on) {
1208                 flite_hw_reset(fimc);
1209                 ret = fimc_lite_hw_init(fimc, true);
1210                 if (!ret) {
1211                         spin_lock_irqsave(&fimc->slock, flags);
1212                         flite_hw_capture_start(fimc);
1213                         spin_unlock_irqrestore(&fimc->slock, flags);
1214                 }
1215         } else {
1216                 set_bit(ST_FLITE_OFF, &fimc->state);
1217
1218                 spin_lock_irqsave(&fimc->slock, flags);
1219                 flite_hw_capture_stop(fimc);
1220                 spin_unlock_irqrestore(&fimc->slock, flags);
1221
1222                 ret = wait_event_timeout(fimc->irq_queue,
1223                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1224                                 msecs_to_jiffies(200));
1225                 if (ret == 0)
1226                         v4l2_err(sd, "s_stream(0) timeout\n");
1227                 clear_bit(ST_FLITE_RUN, &fimc->state);
1228         }
1229
1230         mutex_unlock(&fimc->lock);
1231         return ret;
1232 }
1233
1234 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1235 {
1236         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1237
1238         flite_hw_dump_regs(fimc, __func__);
1239         return 0;
1240 }
1241
1242 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1243 {
1244         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1245         struct vb2_queue *q = &fimc->vb_queue;
1246         struct video_device *vfd = &fimc->ve.vdev;
1247         int ret;
1248
1249         memset(vfd, 0, sizeof(*vfd));
1250         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1251
1252         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1253                  fimc->index);
1254
1255         vfd->fops = &fimc_lite_fops;
1256         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1257         vfd->v4l2_dev = sd->v4l2_dev;
1258         vfd->minor = -1;
1259         vfd->release = video_device_release_empty;
1260         vfd->queue = q;
1261         vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
1262         fimc->reqbufs_count = 0;
1263
1264         INIT_LIST_HEAD(&fimc->pending_buf_q);
1265         INIT_LIST_HEAD(&fimc->active_buf_q);
1266
1267         memset(q, 0, sizeof(*q));
1268         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1269         q->io_modes = VB2_MMAP | VB2_USERPTR;
1270         q->ops = &fimc_lite_qops;
1271         q->mem_ops = &vb2_dma_contig_memops;
1272         q->buf_struct_size = sizeof(struct flite_buffer);
1273         q->drv_priv = fimc;
1274         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1275         q->lock = &fimc->lock;
1276         q->dev = &fimc->pdev->dev;
1277
1278         ret = vb2_queue_init(q);
1279         if (ret < 0)
1280                 return ret;
1281
1282         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1283         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1284         if (ret < 0)
1285                 return ret;
1286
1287         video_set_drvdata(vfd, fimc);
1288         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1289
1290         ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1291         if (ret < 0) {
1292                 media_entity_cleanup(&vfd->entity);
1293                 fimc->ve.pipe = NULL;
1294                 return ret;
1295         }
1296
1297         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1298                   vfd->name, video_device_node_name(vfd));
1299         return 0;
1300 }
1301
1302 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1303 {
1304         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1305
1306         if (fimc == NULL)
1307                 return;
1308
1309         mutex_lock(&fimc->lock);
1310
1311         if (video_is_registered(&fimc->ve.vdev)) {
1312                 video_unregister_device(&fimc->ve.vdev);
1313                 media_entity_cleanup(&fimc->ve.vdev.entity);
1314                 fimc->ve.pipe = NULL;
1315         }
1316
1317         mutex_unlock(&fimc->lock);
1318 }
1319
1320 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1321         .registered = fimc_lite_subdev_registered,
1322         .unregistered = fimc_lite_subdev_unregistered,
1323 };
1324
1325 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1326         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1327         .get_selection = fimc_lite_subdev_get_selection,
1328         .set_selection = fimc_lite_subdev_set_selection,
1329         .get_fmt = fimc_lite_subdev_get_fmt,
1330         .set_fmt = fimc_lite_subdev_set_fmt,
1331 };
1332
1333 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1334         .s_stream = fimc_lite_subdev_s_stream,
1335 };
1336
1337 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1338         .log_status = fimc_lite_log_status,
1339 };
1340
1341 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1342         .core = &fimc_lite_core_ops,
1343         .video = &fimc_lite_subdev_video_ops,
1344         .pad = &fimc_lite_subdev_pad_ops,
1345 };
1346
1347 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1348 {
1349         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1350                                               ctrl_handler);
1351         set_bit(ST_FLITE_CONFIG, &fimc->state);
1352         return 0;
1353 }
1354
1355 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1356         .s_ctrl = fimc_lite_s_ctrl,
1357 };
1358
1359 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1360         .ops    = &fimc_lite_ctrl_ops,
1361         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1362         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1363         .name   = "Test Pattern 640x480",
1364         .step   = 1,
1365 };
1366
1367 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1368 {
1369         struct flite_frame *sink = &fimc->inp_frame;
1370         struct flite_frame *source = &fimc->out_frame;
1371
1372         sink->fmt = &fimc_lite_formats[0];
1373         sink->f_width = FLITE_DEFAULT_WIDTH;
1374         sink->f_height = FLITE_DEFAULT_HEIGHT;
1375
1376         sink->rect.width = FLITE_DEFAULT_WIDTH;
1377         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1378         sink->rect.left = 0;
1379         sink->rect.top = 0;
1380
1381         *source = *sink;
1382 }
1383
1384 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1385 {
1386         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1387         struct v4l2_subdev *sd = &fimc->subdev;
1388         int ret;
1389
1390         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1391         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1392         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1393
1394         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1395         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1396         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1397         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1398                                 fimc->subdev_pads);
1399         if (ret)
1400                 return ret;
1401
1402         v4l2_ctrl_handler_init(handler, 1);
1403         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1404                                                   NULL);
1405         if (handler->error) {
1406                 media_entity_cleanup(&sd->entity);
1407                 return handler->error;
1408         }
1409
1410         sd->ctrl_handler = handler;
1411         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1412         sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1413         sd->entity.ops = &fimc_lite_subdev_media_ops;
1414         sd->owner = THIS_MODULE;
1415         v4l2_set_subdevdata(sd, fimc);
1416
1417         return 0;
1418 }
1419
1420 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1421 {
1422         struct v4l2_subdev *sd = &fimc->subdev;
1423
1424         v4l2_device_unregister_subdev(sd);
1425         media_entity_cleanup(&sd->entity);
1426         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1427         v4l2_set_subdevdata(sd, NULL);
1428 }
1429
1430 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1431 {
1432         if (IS_ERR(fimc->clock))
1433                 return;
1434
1435         clk_put(fimc->clock);
1436         fimc->clock = ERR_PTR(-EINVAL);
1437 }
1438
1439 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1440 {
1441         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1442         return PTR_ERR_OR_ZERO(fimc->clock);
1443 }
1444
1445 static const struct of_device_id flite_of_match[];
1446
1447 static int fimc_lite_probe(struct platform_device *pdev)
1448 {
1449         struct flite_drvdata *drv_data = NULL;
1450         struct device *dev = &pdev->dev;
1451         const struct of_device_id *of_id;
1452         struct fimc_lite *fimc;
1453         int ret;
1454         int irq;
1455
1456         if (!dev->of_node)
1457                 return -ENODEV;
1458
1459         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1460         if (!fimc)
1461                 return -ENOMEM;
1462
1463         of_id = of_match_node(flite_of_match, dev->of_node);
1464         if (of_id)
1465                 drv_data = (struct flite_drvdata *)of_id->data;
1466         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1467
1468         if (!drv_data || fimc->index >= drv_data->num_instances ||
1469                                                 fimc->index < 0) {
1470                 dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1471                 return -EINVAL;
1472         }
1473
1474         fimc->dd = drv_data;
1475         fimc->pdev = pdev;
1476
1477         init_waitqueue_head(&fimc->irq_queue);
1478         spin_lock_init(&fimc->slock);
1479         mutex_init(&fimc->lock);
1480
1481         fimc->regs = devm_platform_ioremap_resource(pdev, 0);
1482         if (IS_ERR(fimc->regs))
1483                 return PTR_ERR(fimc->regs);
1484
1485         irq = platform_get_irq(pdev, 0);
1486         if (irq < 0)
1487                 return irq;
1488
1489         ret = fimc_lite_clk_get(fimc);
1490         if (ret)
1491                 return ret;
1492
1493         ret = devm_request_irq(dev, irq, flite_irq_handler,
1494                                0, dev_name(dev), fimc);
1495         if (ret) {
1496                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1497                 goto err_clk_put;
1498         }
1499
1500         /* The video node will be created within the subdev's registered() op */
1501         ret = fimc_lite_create_capture_subdev(fimc);
1502         if (ret)
1503                 goto err_clk_put;
1504
1505         platform_set_drvdata(pdev, fimc);
1506         pm_runtime_enable(dev);
1507
1508         if (!pm_runtime_enabled(dev)) {
1509                 ret = clk_prepare_enable(fimc->clock);
1510                 if (ret < 0)
1511                         goto err_sd;
1512         }
1513
1514         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1515
1516         fimc_lite_set_default_config(fimc);
1517
1518         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1519                 fimc->index);
1520         return 0;
1521
1522 err_sd:
1523         fimc_lite_unregister_capture_subdev(fimc);
1524 err_clk_put:
1525         fimc_lite_clk_put(fimc);
1526         return ret;
1527 }
1528
1529 #ifdef CONFIG_PM
1530 static int fimc_lite_runtime_resume(struct device *dev)
1531 {
1532         struct fimc_lite *fimc = dev_get_drvdata(dev);
1533
1534         clk_prepare_enable(fimc->clock);
1535         return 0;
1536 }
1537
1538 static int fimc_lite_runtime_suspend(struct device *dev)
1539 {
1540         struct fimc_lite *fimc = dev_get_drvdata(dev);
1541
1542         clk_disable_unprepare(fimc->clock);
1543         return 0;
1544 }
1545 #endif
1546
1547 #ifdef CONFIG_PM_SLEEP
1548 static int fimc_lite_resume(struct device *dev)
1549 {
1550         struct fimc_lite *fimc = dev_get_drvdata(dev);
1551         struct flite_buffer *buf;
1552         unsigned long flags;
1553         int i;
1554
1555         spin_lock_irqsave(&fimc->slock, flags);
1556         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1557             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1558                 spin_unlock_irqrestore(&fimc->slock, flags);
1559                 return 0;
1560         }
1561         flite_hw_reset(fimc);
1562         spin_unlock_irqrestore(&fimc->slock, flags);
1563
1564         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1565                 return 0;
1566
1567         INIT_LIST_HEAD(&fimc->active_buf_q);
1568         fimc_pipeline_call(&fimc->ve, open,
1569                            &fimc->ve.vdev.entity, false);
1570         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1571         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1572
1573         for (i = 0; i < fimc->reqbufs_count; i++) {
1574                 if (list_empty(&fimc->pending_buf_q))
1575                         break;
1576                 buf = fimc_lite_pending_queue_pop(fimc);
1577                 buffer_queue(&buf->vb.vb2_buf);
1578         }
1579         return 0;
1580 }
1581
1582 static int fimc_lite_suspend(struct device *dev)
1583 {
1584         struct fimc_lite *fimc = dev_get_drvdata(dev);
1585         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1586         int ret;
1587
1588         if (test_and_set_bit(ST_LPM, &fimc->state))
1589                 return 0;
1590
1591         ret = fimc_lite_stop_capture(fimc, suspend);
1592         if (ret < 0 || !fimc_lite_active(fimc))
1593                 return ret;
1594
1595         return fimc_pipeline_call(&fimc->ve, close);
1596 }
1597 #endif /* CONFIG_PM_SLEEP */
1598
1599 static void fimc_lite_remove(struct platform_device *pdev)
1600 {
1601         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1602         struct device *dev = &pdev->dev;
1603
1604         if (!pm_runtime_enabled(dev))
1605                 clk_disable_unprepare(fimc->clock);
1606
1607         pm_runtime_disable(dev);
1608         pm_runtime_set_suspended(dev);
1609         fimc_lite_unregister_capture_subdev(fimc);
1610         vb2_dma_contig_clear_max_seg_size(dev);
1611         fimc_lite_clk_put(fimc);
1612
1613         dev_info(dev, "Driver unloaded\n");
1614 }
1615
1616 static const struct dev_pm_ops fimc_lite_pm_ops = {
1617         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1618         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1619                            NULL)
1620 };
1621
1622 /* EXYNOS4212, EXYNOS4412 */
1623 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1624         .max_width              = 8192,
1625         .max_height             = 8192,
1626         .out_width_align        = 8,
1627         .win_hor_offs_align     = 2,
1628         .out_hor_offs_align     = 8,
1629         .max_dma_bufs           = 1,
1630         .num_instances          = 2,
1631 };
1632
1633 /* EXYNOS5250 */
1634 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1635         .max_width              = 8192,
1636         .max_height             = 8192,
1637         .out_width_align        = 8,
1638         .win_hor_offs_align     = 2,
1639         .out_hor_offs_align     = 8,
1640         .max_dma_bufs           = 32,
1641         .num_instances          = 3,
1642 };
1643
1644 static const struct of_device_id flite_of_match[] = {
1645         {
1646                 .compatible = "samsung,exynos4212-fimc-lite",
1647                 .data = &fimc_lite_drvdata_exynos4,
1648         },
1649         {
1650                 .compatible = "samsung,exynos5250-fimc-lite",
1651                 .data = &fimc_lite_drvdata_exynos5,
1652         },
1653         { /* sentinel */ },
1654 };
1655 MODULE_DEVICE_TABLE(of, flite_of_match);
1656
1657 static struct platform_driver fimc_lite_driver = {
1658         .probe          = fimc_lite_probe,
1659         .remove_new     = fimc_lite_remove,
1660         .driver = {
1661                 .of_match_table = flite_of_match,
1662                 .name           = FIMC_LITE_DRV_NAME,
1663                 .pm             = &fimc_lite_pm_ops,
1664         }
1665 };
1666 module_platform_driver(fimc_lite_driver);
1667 MODULE_LICENSE("GPL");
1668 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);