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_state_get_format(sd_state,
 578                                                                 FLITE_SD_PAD_SINK);
 579
 580                         mf->code = sink_fmt->code;
 581                         mf->colorspace = sink_fmt->colorspace;
 582
 583                         rect = v4l2_subdev_state_get_crop(sd_state,
 584                                                           FLITE_SD_PAD_SINK);
 585                 } else {
 586                         mf->code = sink->fmt->mbus_code;
 587                         mf->colorspace = sink->fmt->colorspace;
 588                         rect = &sink->rect;
 589                 }
 590
 591                 /* Allow changing format only on sink pad */
 592                 mf->width = rect->width;
 593                 mf->height = rect->height;
 594         }
 595
 596         mf->field = V4L2_FIELD_NONE;
 597
 598         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
 599                  mf->code, mf->colorspace, mf->width, mf->height);
 600
 601         return fmt;
 602 }
 603
 604 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
 605 {
 606         struct flite_frame *frame = &fimc->inp_frame;
 607
 608         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
 609                               &r->height, 0, frame->f_height, 0, 0);
 610
 611         /* Adjust left/top if cropping rectangle got out of bounds */
 612         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 613         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
 614         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
 615
 616         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
 617                  r->left, r->top, r->width, r->height,
 618                  frame->f_width, frame->f_height);
 619 }
 620
 621 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
 622 {
 623         struct flite_frame *frame = &fimc->out_frame;
 624         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
 625
 626         /* Scaling is not supported so we enforce compose rectangle size
 627            same as size of the sink crop rectangle. */
 628         r->width = crop_rect->width;
 629         r->height = crop_rect->height;
 630
 631         /* Adjust left/top if the composing rectangle got out of bounds */
 632         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
 633         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
 634         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
 635
 636         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
 637                  r->left, r->top, r->width, r->height,
 638                  frame->f_width, frame->f_height);
 639 }
 640
 641 /*
 642  * Video node ioctl operations
 643  */
 644 static int fimc_lite_querycap(struct file *file, void *priv,
 645                                         struct v4l2_capability *cap)
 646 {
 647         strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 648         strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
 649         return 0;
 650 }
 651
 652 static int fimc_lite_enum_fmt(struct file *file, void *priv,
 653                               struct v4l2_fmtdesc *f)
 654 {
 655         const struct fimc_fmt *fmt;
 656
 657         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
 658                 return -EINVAL;
 659
 660         fmt = &fimc_lite_formats[f->index];
 661         f->pixelformat = fmt->fourcc;
 662
 663         return 0;
 664 }
 665
 666 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
 667                                   struct v4l2_format *f)
 668 {
 669         struct fimc_lite *fimc = video_drvdata(file);
 670         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 671         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
 672         struct flite_frame *frame = &fimc->out_frame;
 673         const struct fimc_fmt *fmt = frame->fmt;
 674
 675         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
 676         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
 677
 678         pixm->num_planes = fmt->memplanes;
 679         pixm->pixelformat = fmt->fourcc;
 680         pixm->width = frame->f_width;
 681         pixm->height = frame->f_height;
 682         pixm->field = V4L2_FIELD_NONE;
 683         pixm->colorspace = fmt->colorspace;
 684         return 0;
 685 }
 686
 687 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
 688                              struct v4l2_pix_format_mplane *pixm,
 689                              const struct fimc_fmt **ffmt)
 690 {
 691         u32 bpl = pixm->plane_fmt[0].bytesperline;
 692         struct flite_drvdata *dd = fimc->dd;
 693         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
 694         const struct fimc_fmt *fmt;
 695
 696         if (WARN_ON(inp_fmt == NULL))
 697                 return -EINVAL;
 698         /*
 699          * We allow some flexibility only for YUV formats. In case of raw
 700          * raw Bayer the FIMC-LITE's output format must match its camera
 701          * interface input format.
 702          */
 703         if (inp_fmt->flags & FMT_FLAGS_YUV)
 704                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
 705                                                 inp_fmt->flags, 0);
 706         else
 707                 fmt = inp_fmt;
 708
 709         if (WARN_ON(fmt == NULL))
 710                 return -EINVAL;
 711         if (ffmt)
 712                 *ffmt = fmt;
 713         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
 714                               ffs(dd->out_width_align) - 1,
 715                               &pixm->height, 0, dd->max_height, 0, 0);
 716
 717         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
 718                 pixm->plane_fmt[0].bytesperline = (pixm->width *
 719                                                    fmt->depth[0]) / 8;
 720
 721         if (pixm->plane_fmt[0].sizeimage == 0)
 722                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
 723                                                 fmt->depth[0]) / 8;
 724         pixm->num_planes = fmt->memplanes;
 725         pixm->pixelformat = fmt->fourcc;
 726         pixm->colorspace = fmt->colorspace;
 727         pixm->field = V4L2_FIELD_NONE;
 728         return 0;
 729 }
 730
 731 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
 732                                     struct v4l2_format *f)
 733 {
 734         struct fimc_lite *fimc = video_drvdata(file);
 735         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
 736 }
 737
 738 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
 739                                   struct v4l2_format *f)
 740 {
 741         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 742         struct fimc_lite *fimc = video_drvdata(file);
 743         struct flite_frame *frame = &fimc->out_frame;
 744         const struct fimc_fmt *fmt = NULL;
 745         int ret;
 746
 747         if (vb2_is_busy(&fimc->vb_queue))
 748                 return -EBUSY;
 749
 750         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
 751         if (ret < 0)
 752                 return ret;
 753
 754         frame->fmt = fmt;
 755         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
 756                                pixm->plane_fmt[0].sizeimage);
 757         frame->f_width = pixm->width;
 758         frame->f_height = pixm->height;
 759
 760         return 0;
 761 }
 762
 763 static int fimc_pipeline_validate(struct fimc_lite *fimc)
 764 {
 765         struct v4l2_subdev *sd = &fimc->subdev;
 766         struct v4l2_subdev_format sink_fmt = {
 767                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 768         };
 769         struct v4l2_subdev_format src_fmt = {
 770                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 771         };
 772         struct media_pad *pad;
 773         int ret;
 774
 775         while (1) {
 776                 /* Retrieve format at the sink pad */
 777                 pad = &sd->entity.pads[0];
 778                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 779                         break;
 780                 /* Don't call FIMC subdev operation to avoid nested locking */
 781                 if (sd == &fimc->subdev) {
 782                         struct flite_frame *ff = &fimc->out_frame;
 783                         sink_fmt.format.width = ff->f_width;
 784                         sink_fmt.format.height = ff->f_height;
 785                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
 786                 } else {
 787                         sink_fmt.pad = pad->index;
 788                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
 789                                                &sink_fmt);
 790                         if (ret < 0 && ret != -ENOIOCTLCMD)
 791                                 return -EPIPE;
 792                 }
 793                 /* Retrieve format at the source pad */
 794                 pad = media_pad_remote_pad_first(pad);
 795                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 796                         break;
 797
 798                 sd = media_entity_to_v4l2_subdev(pad->entity);
 799                 src_fmt.pad = pad->index;
 800                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 801                 if (ret < 0 && ret != -ENOIOCTLCMD)
 802                         return -EPIPE;
 803
 804                 if (src_fmt.format.width != sink_fmt.format.width ||
 805                     src_fmt.format.height != sink_fmt.format.height ||
 806                     src_fmt.format.code != sink_fmt.format.code)
 807                         return -EPIPE;
 808         }
 809         return 0;
 810 }
 811
 812 static int fimc_lite_streamon(struct file *file, void *priv,
 813                               enum v4l2_buf_type type)
 814 {
 815         struct fimc_lite *fimc = video_drvdata(file);
 816         int ret;
 817
 818         if (fimc_lite_active(fimc))
 819                 return -EBUSY;
 820
 821         ret = video_device_pipeline_start(&fimc->ve.vdev, &fimc->ve.pipe->mp);
 822         if (ret < 0)
 823                 return ret;
 824
 825         ret = fimc_pipeline_validate(fimc);
 826         if (ret < 0)
 827                 goto err_p_stop;
 828
 829         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
 830
 831         ret = vb2_ioctl_streamon(file, priv, type);
 832         if (!ret) {
 833                 fimc->streaming = true;
 834                 return ret;
 835         }
 836
 837 err_p_stop:
 838         video_device_pipeline_stop(&fimc->ve.vdev);
 839         return 0;
 840 }
 841
 842 static int fimc_lite_streamoff(struct file *file, void *priv,
 843                                enum v4l2_buf_type type)
 844 {
 845         struct fimc_lite *fimc = video_drvdata(file);
 846         int ret;
 847
 848         ret = vb2_ioctl_streamoff(file, priv, type);
 849         if (ret < 0)
 850                 return ret;
 851
 852         video_device_pipeline_stop(&fimc->ve.vdev);
 853         fimc->streaming = false;
 854         return 0;
 855 }
 856
 857 static int fimc_lite_reqbufs(struct file *file, void *priv,
 858                              struct v4l2_requestbuffers *reqbufs)
 859 {
 860         struct fimc_lite *fimc = video_drvdata(file);
 861         int ret;
 862
 863         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
 864         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
 865         if (!ret)
 866                 fimc->reqbufs_count = reqbufs->count;
 867
 868         return ret;
 869 }
 870
 871 static int fimc_lite_g_selection(struct file *file, void *fh,
 872                                  struct v4l2_selection *sel)
 873 {
 874         struct fimc_lite *fimc = video_drvdata(file);
 875         struct flite_frame *f = &fimc->out_frame;
 876
 877         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 878                 return -EINVAL;
 879
 880         switch (sel->target) {
 881         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 882         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 883                 sel->r.left = 0;
 884                 sel->r.top = 0;
 885                 sel->r.width = f->f_width;
 886                 sel->r.height = f->f_height;
 887                 return 0;
 888
 889         case V4L2_SEL_TGT_COMPOSE:
 890                 sel->r = f->rect;
 891                 return 0;
 892         }
 893
 894         return -EINVAL;
 895 }
 896
 897 static int fimc_lite_s_selection(struct file *file, void *fh,
 898                                  struct v4l2_selection *sel)
 899 {
 900         struct fimc_lite *fimc = video_drvdata(file);
 901         struct flite_frame *f = &fimc->out_frame;
 902         struct v4l2_rect rect = sel->r;
 903         unsigned long flags;
 904
 905         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 906             sel->target != V4L2_SEL_TGT_COMPOSE)
 907                 return -EINVAL;
 908
 909         fimc_lite_try_compose(fimc, &rect);
 910
 911         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
 912             !v4l2_rect_enclosed(&rect, &sel->r))
 913                 return -ERANGE;
 914
 915         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
 916             !v4l2_rect_enclosed(&sel->r, &rect))
 917                 return -ERANGE;
 918
 919         sel->r = rect;
 920         spin_lock_irqsave(&fimc->slock, flags);
 921         f->rect = rect;
 922         set_bit(ST_FLITE_CONFIG, &fimc->state);
 923         spin_unlock_irqrestore(&fimc->slock, flags);
 924
 925         return 0;
 926 }
 927
 928 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
 929         .vidioc_querycap                = fimc_lite_querycap,
 930         .vidioc_enum_fmt_vid_cap        = fimc_lite_enum_fmt,
 931         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
 932         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
 933         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
 934         .vidioc_g_selection             = fimc_lite_g_selection,
 935         .vidioc_s_selection             = fimc_lite_s_selection,
 936         .vidioc_reqbufs                 = fimc_lite_reqbufs,
 937         .vidioc_querybuf                = vb2_ioctl_querybuf,
 938         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 939         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 940         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 941         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 942         .vidioc_streamon                = fimc_lite_streamon,
 943         .vidioc_streamoff               = fimc_lite_streamoff,
 944 };
 945
 946 /* Capture subdev media entity operations */
 947 static int fimc_lite_link_setup(struct media_entity *entity,
 948                                 const struct media_pad *local,
 949                                 const struct media_pad *remote, u32 flags)
 950 {
 951         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 952         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
 953         int ret = 0;
 954
 955         if (WARN_ON(fimc == NULL))
 956                 return 0;
 957
 958         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
 959                  __func__, remote->entity->name, local->entity->name,
 960                  flags, fimc->source_subdev_grp_id);
 961
 962         switch (local->index) {
 963         case FLITE_SD_PAD_SINK:
 964                 if (flags & MEDIA_LNK_FL_ENABLED) {
 965                         if (fimc->source_subdev_grp_id == 0)
 966                                 fimc->source_subdev_grp_id = sd->grp_id;
 967                         else
 968                                 ret = -EBUSY;
 969                 } else {
 970                         fimc->source_subdev_grp_id = 0;
 971                         fimc->sensor = NULL;
 972                 }
 973                 break;
 974
 975         case FLITE_SD_PAD_SOURCE_DMA:
 976                 if (!(flags & MEDIA_LNK_FL_ENABLED))
 977                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
 978                 else
 979                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
 980                 break;
 981
 982         case FLITE_SD_PAD_SOURCE_ISP:
 983                 if (!(flags & MEDIA_LNK_FL_ENABLED))
 984                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
 985                 else
 986                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
 987                 break;
 988
 989         default:
 990                 v4l2_err(sd, "Invalid pad index\n");
 991                 ret = -EINVAL;
 992         }
 993         mb();
 994
 995         return ret;
 996 }
 997
 998 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
 999         .link_setup = fimc_lite_link_setup,
1000 };
1001
1002 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1003                                            struct v4l2_subdev_state *sd_state,
1004                                            struct v4l2_subdev_mbus_code_enum *code)
1005 {
1006         const struct fimc_fmt *fmt;
1007
1008         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1009         if (!fmt)
1010                 return -EINVAL;
1011         code->code = fmt->mbus_code;
1012         return 0;
1013 }
1014
1015 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1016                 struct v4l2_subdev *sd,
1017                 struct v4l2_subdev_state *sd_state, unsigned int pad)
1018 {
1019         if (pad != FLITE_SD_PAD_SINK)
1020                 pad = FLITE_SD_PAD_SOURCE_DMA;
1021
1022         return v4l2_subdev_state_get_format(sd_state, pad);
1023 }
1024
1025 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1026                                     struct v4l2_subdev_state *sd_state,
1027                                     struct v4l2_subdev_format *fmt)
1028 {
1029         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1030         struct v4l2_mbus_framefmt *mf = &fmt->format;
1031         struct flite_frame *f = &fimc->inp_frame;
1032
1033         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1034                 mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1035                 fmt->format = *mf;
1036                 return 0;
1037         }
1038
1039         mutex_lock(&fimc->lock);
1040         mf->colorspace = f->fmt->colorspace;
1041         mf->code = f->fmt->mbus_code;
1042
1043         if (fmt->pad == FLITE_SD_PAD_SINK) {
1044                 /* full camera input frame size */
1045                 mf->width = f->f_width;
1046                 mf->height = f->f_height;
1047         } else {
1048                 /* crop size */
1049                 mf->width = f->rect.width;
1050                 mf->height = f->rect.height;
1051         }
1052         mutex_unlock(&fimc->lock);
1053         return 0;
1054 }
1055
1056 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1057                                     struct v4l2_subdev_state *sd_state,
1058                                     struct v4l2_subdev_format *fmt)
1059 {
1060         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1061         struct v4l2_mbus_framefmt *mf = &fmt->format;
1062         struct flite_frame *sink = &fimc->inp_frame;
1063         struct flite_frame *source = &fimc->out_frame;
1064         const struct fimc_fmt *ffmt;
1065
1066         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1067                  fmt->pad, mf->code, mf->width, mf->height);
1068
1069         mutex_lock(&fimc->lock);
1070
1071         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1072             media_entity_is_streaming(&sd->entity)) ||
1073             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1074             vb2_is_busy(&fimc->vb_queue))) {
1075                 mutex_unlock(&fimc->lock);
1076                 return -EBUSY;
1077         }
1078
1079         ffmt = fimc_lite_subdev_try_fmt(fimc, sd_state, fmt);
1080
1081         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1082                 struct v4l2_mbus_framefmt *src_fmt;
1083
1084                 mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1085                 *mf = fmt->format;
1086
1087                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1088                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1089                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, sd_state,
1090                                                                  pad);
1091                         *src_fmt = *mf;
1092                 }
1093
1094                 mutex_unlock(&fimc->lock);
1095                 return 0;
1096         }
1097
1098         if (fmt->pad == FLITE_SD_PAD_SINK) {
1099                 sink->f_width = mf->width;
1100                 sink->f_height = mf->height;
1101                 sink->fmt = ffmt;
1102                 /* Set sink crop rectangle */
1103                 sink->rect.width = mf->width;
1104                 sink->rect.height = mf->height;
1105                 sink->rect.left = 0;
1106                 sink->rect.top = 0;
1107                 /* Reset source format and crop rectangle */
1108                 source->rect = sink->rect;
1109                 source->f_width = mf->width;
1110                 source->f_height = mf->height;
1111         }
1112
1113         mutex_unlock(&fimc->lock);
1114         return 0;
1115 }
1116
1117 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1118                                           struct v4l2_subdev_state *sd_state,
1119                                           struct v4l2_subdev_selection *sel)
1120 {
1121         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1122         struct flite_frame *f = &fimc->inp_frame;
1123
1124         if ((sel->target != V4L2_SEL_TGT_CROP &&
1125              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1126              sel->pad != FLITE_SD_PAD_SINK)
1127                 return -EINVAL;
1128
1129         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1130                 sel->r = *v4l2_subdev_state_get_crop(sd_state, sel->pad);
1131                 return 0;
1132         }
1133
1134         mutex_lock(&fimc->lock);
1135         if (sel->target == V4L2_SEL_TGT_CROP) {
1136                 sel->r = f->rect;
1137         } else {
1138                 sel->r.left = 0;
1139                 sel->r.top = 0;
1140                 sel->r.width = f->f_width;
1141                 sel->r.height = f->f_height;
1142         }
1143         mutex_unlock(&fimc->lock);
1144
1145         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1146                  __func__, f->rect.left, f->rect.top, f->rect.width,
1147                  f->rect.height, f->f_width, f->f_height);
1148
1149         return 0;
1150 }
1151
1152 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1153                                           struct v4l2_subdev_state *sd_state,
1154                                           struct v4l2_subdev_selection *sel)
1155 {
1156         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1157         struct flite_frame *f = &fimc->inp_frame;
1158         int ret = 0;
1159
1160         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1161                 return -EINVAL;
1162
1163         mutex_lock(&fimc->lock);
1164         fimc_lite_try_crop(fimc, &sel->r);
1165
1166         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1167                 *v4l2_subdev_state_get_crop(sd_state, sel->pad) = sel->r;
1168         } else {
1169                 unsigned long flags;
1170                 spin_lock_irqsave(&fimc->slock, flags);
1171                 f->rect = sel->r;
1172                 /* Same crop rectangle on the source pad */
1173                 fimc->out_frame.rect = sel->r;
1174                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1175                 spin_unlock_irqrestore(&fimc->slock, flags);
1176         }
1177         mutex_unlock(&fimc->lock);
1178
1179         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1180                  __func__, f->rect.left, f->rect.top, f->rect.width,
1181                  f->rect.height, f->f_width, f->f_height);
1182
1183         return ret;
1184 }
1185
1186 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1187 {
1188         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1189         unsigned long flags;
1190         int ret;
1191
1192         /*
1193          * Find sensor subdev linked to FIMC-LITE directly or through
1194          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1195          * is used as a subdev only and feeds data internally to FIMC-IS.
1196          * The pipeline links are protected through entity.pipe so there is no
1197          * need to take the media graph mutex here.
1198          */
1199         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1200
1201         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1202                 return -ENOIOCTLCMD;
1203
1204         mutex_lock(&fimc->lock);
1205         if (on) {
1206                 flite_hw_reset(fimc);
1207                 ret = fimc_lite_hw_init(fimc, true);
1208                 if (!ret) {
1209                         spin_lock_irqsave(&fimc->slock, flags);
1210                         flite_hw_capture_start(fimc);
1211                         spin_unlock_irqrestore(&fimc->slock, flags);
1212                 }
1213         } else {
1214                 set_bit(ST_FLITE_OFF, &fimc->state);
1215
1216                 spin_lock_irqsave(&fimc->slock, flags);
1217                 flite_hw_capture_stop(fimc);
1218                 spin_unlock_irqrestore(&fimc->slock, flags);
1219
1220                 ret = wait_event_timeout(fimc->irq_queue,
1221                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1222                                 msecs_to_jiffies(200));
1223                 if (ret == 0)
1224                         v4l2_err(sd, "s_stream(0) timeout\n");
1225                 clear_bit(ST_FLITE_RUN, &fimc->state);
1226         }
1227
1228         mutex_unlock(&fimc->lock);
1229         return ret;
1230 }
1231
1232 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1233 {
1234         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1235
1236         flite_hw_dump_regs(fimc, __func__);
1237         return 0;
1238 }
1239
1240 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1241 {
1242         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1243         struct vb2_queue *q = &fimc->vb_queue;
1244         struct video_device *vfd = &fimc->ve.vdev;
1245         int ret;
1246
1247         memset(vfd, 0, sizeof(*vfd));
1248         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1249
1250         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1251                  fimc->index);
1252
1253         vfd->fops = &fimc_lite_fops;
1254         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1255         vfd->v4l2_dev = sd->v4l2_dev;
1256         vfd->minor = -1;
1257         vfd->release = video_device_release_empty;
1258         vfd->queue = q;
1259         vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
1260         fimc->reqbufs_count = 0;
1261
1262         INIT_LIST_HEAD(&fimc->pending_buf_q);
1263         INIT_LIST_HEAD(&fimc->active_buf_q);
1264
1265         memset(q, 0, sizeof(*q));
1266         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1267         q->io_modes = VB2_MMAP | VB2_USERPTR;
1268         q->ops = &fimc_lite_qops;
1269         q->mem_ops = &vb2_dma_contig_memops;
1270         q->buf_struct_size = sizeof(struct flite_buffer);
1271         q->drv_priv = fimc;
1272         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1273         q->lock = &fimc->lock;
1274         q->dev = &fimc->pdev->dev;
1275
1276         ret = vb2_queue_init(q);
1277         if (ret < 0)
1278                 return ret;
1279
1280         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1281         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1282         if (ret < 0)
1283                 return ret;
1284
1285         video_set_drvdata(vfd, fimc);
1286         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1287
1288         ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1289         if (ret < 0) {
1290                 media_entity_cleanup(&vfd->entity);
1291                 fimc->ve.pipe = NULL;
1292                 return ret;
1293         }
1294
1295         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1296                   vfd->name, video_device_node_name(vfd));
1297         return 0;
1298 }
1299
1300 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1301 {
1302         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1303
1304         if (fimc == NULL)
1305                 return;
1306
1307         mutex_lock(&fimc->lock);
1308
1309         if (video_is_registered(&fimc->ve.vdev)) {
1310                 video_unregister_device(&fimc->ve.vdev);
1311                 media_entity_cleanup(&fimc->ve.vdev.entity);
1312                 fimc->ve.pipe = NULL;
1313         }
1314
1315         mutex_unlock(&fimc->lock);
1316 }
1317
1318 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1319         .registered = fimc_lite_subdev_registered,
1320         .unregistered = fimc_lite_subdev_unregistered,
1321 };
1322
1323 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1324         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1325         .get_selection = fimc_lite_subdev_get_selection,
1326         .set_selection = fimc_lite_subdev_set_selection,
1327         .get_fmt = fimc_lite_subdev_get_fmt,
1328         .set_fmt = fimc_lite_subdev_set_fmt,
1329 };
1330
1331 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1332         .s_stream = fimc_lite_subdev_s_stream,
1333 };
1334
1335 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1336         .log_status = fimc_lite_log_status,
1337 };
1338
1339 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1340         .core = &fimc_lite_core_ops,
1341         .video = &fimc_lite_subdev_video_ops,
1342         .pad = &fimc_lite_subdev_pad_ops,
1343 };
1344
1345 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1346 {
1347         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1348                                               ctrl_handler);
1349         set_bit(ST_FLITE_CONFIG, &fimc->state);
1350         return 0;
1351 }
1352
1353 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1354         .s_ctrl = fimc_lite_s_ctrl,
1355 };
1356
1357 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1358         .ops    = &fimc_lite_ctrl_ops,
1359         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1360         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1361         .name   = "Test Pattern 640x480",
1362         .step   = 1,
1363 };
1364
1365 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1366 {
1367         struct flite_frame *sink = &fimc->inp_frame;
1368         struct flite_frame *source = &fimc->out_frame;
1369
1370         sink->fmt = &fimc_lite_formats[0];
1371         sink->f_width = FLITE_DEFAULT_WIDTH;
1372         sink->f_height = FLITE_DEFAULT_HEIGHT;
1373
1374         sink->rect.width = FLITE_DEFAULT_WIDTH;
1375         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1376         sink->rect.left = 0;
1377         sink->rect.top = 0;
1378
1379         *source = *sink;
1380 }
1381
1382 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1383 {
1384         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1385         struct v4l2_subdev *sd = &fimc->subdev;
1386         int ret;
1387
1388         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1389         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1390         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1391
1392         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1393         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1394         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1395         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1396                                 fimc->subdev_pads);
1397         if (ret)
1398                 return ret;
1399
1400         v4l2_ctrl_handler_init(handler, 1);
1401         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1402                                                   NULL);
1403         if (handler->error) {
1404                 media_entity_cleanup(&sd->entity);
1405                 return handler->error;
1406         }
1407
1408         sd->ctrl_handler = handler;
1409         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1410         sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1411         sd->entity.ops = &fimc_lite_subdev_media_ops;
1412         sd->owner = THIS_MODULE;
1413         v4l2_set_subdevdata(sd, fimc);
1414
1415         return 0;
1416 }
1417
1418 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1419 {
1420         struct v4l2_subdev *sd = &fimc->subdev;
1421
1422         v4l2_device_unregister_subdev(sd);
1423         media_entity_cleanup(&sd->entity);
1424         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1425         v4l2_set_subdevdata(sd, NULL);
1426 }
1427
1428 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1429 {
1430         if (IS_ERR(fimc->clock))
1431                 return;
1432
1433         clk_put(fimc->clock);
1434         fimc->clock = ERR_PTR(-EINVAL);
1435 }
1436
1437 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1438 {
1439         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1440         return PTR_ERR_OR_ZERO(fimc->clock);
1441 }
1442
1443 static const struct of_device_id flite_of_match[];
1444
1445 static int fimc_lite_probe(struct platform_device *pdev)
1446 {
1447         struct flite_drvdata *drv_data = NULL;
1448         struct device *dev = &pdev->dev;
1449         const struct of_device_id *of_id;
1450         struct fimc_lite *fimc;
1451         int ret;
1452         int irq;
1453
1454         if (!dev->of_node)
1455                 return -ENODEV;
1456
1457         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1458         if (!fimc)
1459                 return -ENOMEM;
1460
1461         of_id = of_match_node(flite_of_match, dev->of_node);
1462         if (of_id)
1463                 drv_data = (struct flite_drvdata *)of_id->data;
1464         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1465
1466         if (!drv_data || fimc->index >= drv_data->num_instances ||
1467                                                 fimc->index < 0) {
1468                 dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1469                 return -EINVAL;
1470         }
1471
1472         fimc->dd = drv_data;
1473         fimc->pdev = pdev;
1474
1475         init_waitqueue_head(&fimc->irq_queue);
1476         spin_lock_init(&fimc->slock);
1477         mutex_init(&fimc->lock);
1478
1479         fimc->regs = devm_platform_ioremap_resource(pdev, 0);
1480         if (IS_ERR(fimc->regs))
1481                 return PTR_ERR(fimc->regs);
1482
1483         irq = platform_get_irq(pdev, 0);
1484         if (irq < 0)
1485                 return irq;
1486
1487         ret = fimc_lite_clk_get(fimc);
1488         if (ret)
1489                 return ret;
1490
1491         ret = devm_request_irq(dev, irq, flite_irq_handler,
1492                                0, dev_name(dev), fimc);
1493         if (ret) {
1494                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1495                 goto err_clk_put;
1496         }
1497
1498         /* The video node will be created within the subdev's registered() op */
1499         ret = fimc_lite_create_capture_subdev(fimc);
1500         if (ret)
1501                 goto err_clk_put;
1502
1503         platform_set_drvdata(pdev, fimc);
1504         pm_runtime_enable(dev);
1505
1506         if (!pm_runtime_enabled(dev)) {
1507                 ret = clk_prepare_enable(fimc->clock);
1508                 if (ret < 0)
1509                         goto err_sd;
1510         }
1511
1512         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1513
1514         fimc_lite_set_default_config(fimc);
1515
1516         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1517                 fimc->index);
1518         return 0;
1519
1520 err_sd:
1521         fimc_lite_unregister_capture_subdev(fimc);
1522 err_clk_put:
1523         fimc_lite_clk_put(fimc);
1524         return ret;
1525 }
1526
1527 #ifdef CONFIG_PM
1528 static int fimc_lite_runtime_resume(struct device *dev)
1529 {
1530         struct fimc_lite *fimc = dev_get_drvdata(dev);
1531
1532         clk_prepare_enable(fimc->clock);
1533         return 0;
1534 }
1535
1536 static int fimc_lite_runtime_suspend(struct device *dev)
1537 {
1538         struct fimc_lite *fimc = dev_get_drvdata(dev);
1539
1540         clk_disable_unprepare(fimc->clock);
1541         return 0;
1542 }
1543 #endif
1544
1545 #ifdef CONFIG_PM_SLEEP
1546 static int fimc_lite_resume(struct device *dev)
1547 {
1548         struct fimc_lite *fimc = dev_get_drvdata(dev);
1549         struct flite_buffer *buf;
1550         unsigned long flags;
1551         int i;
1552
1553         spin_lock_irqsave(&fimc->slock, flags);
1554         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1555             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1556                 spin_unlock_irqrestore(&fimc->slock, flags);
1557                 return 0;
1558         }
1559         flite_hw_reset(fimc);
1560         spin_unlock_irqrestore(&fimc->slock, flags);
1561
1562         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1563                 return 0;
1564
1565         INIT_LIST_HEAD(&fimc->active_buf_q);
1566         fimc_pipeline_call(&fimc->ve, open,
1567                            &fimc->ve.vdev.entity, false);
1568         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1569         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1570
1571         for (i = 0; i < fimc->reqbufs_count; i++) {
1572                 if (list_empty(&fimc->pending_buf_q))
1573                         break;
1574                 buf = fimc_lite_pending_queue_pop(fimc);
1575                 buffer_queue(&buf->vb.vb2_buf);
1576         }
1577         return 0;
1578 }
1579
1580 static int fimc_lite_suspend(struct device *dev)
1581 {
1582         struct fimc_lite *fimc = dev_get_drvdata(dev);
1583         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1584         int ret;
1585
1586         if (test_and_set_bit(ST_LPM, &fimc->state))
1587                 return 0;
1588
1589         ret = fimc_lite_stop_capture(fimc, suspend);
1590         if (ret < 0 || !fimc_lite_active(fimc))
1591                 return ret;
1592
1593         return fimc_pipeline_call(&fimc->ve, close);
1594 }
1595 #endif /* CONFIG_PM_SLEEP */
1596
1597 static void fimc_lite_remove(struct platform_device *pdev)
1598 {
1599         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1600         struct device *dev = &pdev->dev;
1601
1602         if (!pm_runtime_enabled(dev))
1603                 clk_disable_unprepare(fimc->clock);
1604
1605         pm_runtime_disable(dev);
1606         pm_runtime_set_suspended(dev);
1607         fimc_lite_unregister_capture_subdev(fimc);
1608         vb2_dma_contig_clear_max_seg_size(dev);
1609         fimc_lite_clk_put(fimc);
1610
1611         dev_info(dev, "Driver unloaded\n");
1612 }
1613
1614 static const struct dev_pm_ops fimc_lite_pm_ops = {
1615         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1616         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1617                            NULL)
1618 };
1619
1620 /* EXYNOS4212, EXYNOS4412 */
1621 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1622         .max_width              = 8192,
1623         .max_height             = 8192,
1624         .out_width_align        = 8,
1625         .win_hor_offs_align     = 2,
1626         .out_hor_offs_align     = 8,
1627         .max_dma_bufs           = 1,
1628         .num_instances          = 2,
1629 };
1630
1631 /* EXYNOS5250 */
1632 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1633         .max_width              = 8192,
1634         .max_height             = 8192,
1635         .out_width_align        = 8,
1636         .win_hor_offs_align     = 2,
1637         .out_hor_offs_align     = 8,
1638         .max_dma_bufs           = 32,
1639         .num_instances          = 3,
1640 };
1641
1642 static const struct of_device_id flite_of_match[] = {
1643         {
1644                 .compatible = "samsung,exynos4212-fimc-lite",
1645                 .data = &fimc_lite_drvdata_exynos4,
1646         },
1647         {
1648                 .compatible = "samsung,exynos5250-fimc-lite",
1649                 .data = &fimc_lite_drvdata_exynos5,
1650         },
1651         { /* sentinel */ },
1652 };
1653 MODULE_DEVICE_TABLE(of, flite_of_match);
1654
1655 static struct platform_driver fimc_lite_driver = {
1656         .probe          = fimc_lite_probe,
1657         .remove_new     = fimc_lite_remove,
1658         .driver = {
1659                 .of_match_table = flite_of_match,
1660                 .name           = FIMC_LITE_DRV_NAME,
1661                 .pm             = &fimc_lite_pm_ops,
1662         }
1663 };
1664 module_platform_driver(fimc_lite_driver);
1665 MODULE_LICENSE("GPL");
1666 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);