drivers/staging/media/imx/imx-ic-prpencvf.c

   1 /*
   2  * V4L2 Capture IC Preprocess Subdev for Freescale i.MX5/6 SOC
   3  *
   4  * This subdevice handles capture of video frames from the CSI or VDIC,
   5  * which are routed directly to the Image Converter preprocess tasks,
   6  * for resizing, colorspace conversion, and rotation.
   7  *
   8  * Copyright (c) 2012-2017 Mentor Graphics Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  */
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/module.h>
  18 #include <linux/sched.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/timer.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-device.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-mc.h>
  26 #include <media/v4l2-subdev.h>
  27 #include <media/imx.h>
  28 #include "imx-media.h"
  29 #include "imx-ic.h"
  30
  31 /*
  32  * Min/Max supported width and heights.
  33  *
  34  * We allow planar output, so we have to align width at the source pad
  35  * by 16 pixels to meet IDMAC alignment requirements for possible planar
  36  * output.
  37  *
  38  * TODO: move this into pad format negotiation, if capture device
  39  * has not requested a planar format, we should allow 8 pixel
  40  * alignment at the source pad.
  41  */
  42 #define MIN_W_SINK  176
  43 #define MIN_H_SINK  144
  44 #define MAX_W_SINK 4096
  45 #define MAX_H_SINK 4096
  46 #define W_ALIGN_SINK  3 /* multiple of 8 pixels */
  47 #define H_ALIGN_SINK  1 /* multiple of 2 lines */
  48
  49 #define MAX_W_SRC  1024
  50 #define MAX_H_SRC  1024
  51 #define W_ALIGN_SRC   4 /* multiple of 16 pixels */
  52 #define H_ALIGN_SRC   1 /* multiple of 2 lines */
  53
  54 #define S_ALIGN       1 /* multiple of 2 */
  55
  56 struct prp_priv {
  57         struct imx_media_dev *md;
  58         struct imx_ic_priv *ic_priv;
  59         struct media_pad pad[PRPENCVF_NUM_PADS];
  60         /* the video device at output pad */
  61         struct imx_media_video_dev *vdev;
  62
  63         /* lock to protect all members below */
  64         struct mutex lock;
  65
  66         /* IPU units we require */
  67         struct ipu_soc *ipu;
  68         struct ipu_ic *ic;
  69         struct ipuv3_channel *out_ch;
  70         struct ipuv3_channel *rot_in_ch;
  71         struct ipuv3_channel *rot_out_ch;
  72
  73         /* active vb2 buffers to send to video dev sink */
  74         struct imx_media_buffer *active_vb2_buf[2];
  75         struct imx_media_dma_buf underrun_buf;
  76
  77         int ipu_buf_num;  /* ipu double buffer index: 0-1 */
  78
  79         /* the sink for the captured frames */
  80         struct media_entity *sink;
  81         /* the source subdev */
  82         struct v4l2_subdev *src_sd;
  83
  84         struct v4l2_mbus_framefmt format_mbus[PRPENCVF_NUM_PADS];
  85         const struct imx_media_pixfmt *cc[PRPENCVF_NUM_PADS];
  86         struct v4l2_fract frame_interval;
  87
  88         struct imx_media_dma_buf rot_buf[2];
  89
  90         /* controls */
  91         struct v4l2_ctrl_handler ctrl_hdlr;
  92         int  rotation; /* degrees */
  93         bool hflip;
  94         bool vflip;
  95
  96         /* derived from rotation, hflip, vflip controls */
  97         enum ipu_rotate_mode rot_mode;
  98
  99         spinlock_t irqlock; /* protect eof_irq handler */
 100
 101         struct timer_list eof_timeout_timer;
 102         int eof_irq;
 103         int nfb4eof_irq;
 104
 105         int stream_count;
 106         bool last_eof;  /* waiting for last EOF at stream off */
 107         bool nfb4eof;    /* NFB4EOF encountered during streaming */
 108         struct completion last_eof_comp;
 109 };
 110
 111 static const struct prp_channels {
 112         u32 out_ch;
 113         u32 rot_in_ch;
 114         u32 rot_out_ch;
 115 } prp_channel[] = {
 116         [IC_TASK_ENCODER] = {
 117                 .out_ch = IPUV3_CHANNEL_IC_PRP_ENC_MEM,
 118                 .rot_in_ch = IPUV3_CHANNEL_MEM_ROT_ENC,
 119                 .rot_out_ch = IPUV3_CHANNEL_ROT_ENC_MEM,
 120         },
 121         [IC_TASK_VIEWFINDER] = {
 122                 .out_ch = IPUV3_CHANNEL_IC_PRP_VF_MEM,
 123                 .rot_in_ch = IPUV3_CHANNEL_MEM_ROT_VF,
 124                 .rot_out_ch = IPUV3_CHANNEL_ROT_VF_MEM,
 125         },
 126 };
 127
 128 static inline struct prp_priv *sd_to_priv(struct v4l2_subdev *sd)
 129 {
 130         struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
 131
 132         return ic_priv->task_priv;
 133 }
 134
 135 static void prp_put_ipu_resources(struct prp_priv *priv)
 136 {
 137         if (priv->ic)
 138                 ipu_ic_put(priv->ic);
 139         priv->ic = NULL;
 140
 141         if (priv->out_ch)
 142                 ipu_idmac_put(priv->out_ch);
 143         priv->out_ch = NULL;
 144
 145         if (priv->rot_in_ch)
 146                 ipu_idmac_put(priv->rot_in_ch);
 147         priv->rot_in_ch = NULL;
 148
 149         if (priv->rot_out_ch)
 150                 ipu_idmac_put(priv->rot_out_ch);
 151         priv->rot_out_ch = NULL;
 152 }
 153
 154 static int prp_get_ipu_resources(struct prp_priv *priv)
 155 {
 156         struct imx_ic_priv *ic_priv = priv->ic_priv;
 157         struct ipu_ic *ic;
 158         struct ipuv3_channel *out_ch, *rot_in_ch, *rot_out_ch;
 159         int ret, task = ic_priv->task_id;
 160
 161         priv->ipu = priv->md->ipu[ic_priv->ipu_id];
 162
 163         ic = ipu_ic_get(priv->ipu, task);
 164         if (IS_ERR(ic)) {
 165                 v4l2_err(&ic_priv->sd, "failed to get IC\n");
 166                 ret = PTR_ERR(ic);
 167                 goto out;
 168         }
 169         priv->ic = ic;
 170
 171         out_ch = ipu_idmac_get(priv->ipu, prp_channel[task].out_ch);
 172         if (IS_ERR(out_ch)) {
 173                 v4l2_err(&ic_priv->sd, "could not get IDMAC channel %u\n",
 174                          prp_channel[task].out_ch);
 175                 ret = PTR_ERR(out_ch);
 176                 goto out;
 177         }
 178         priv->out_ch = out_ch;
 179
 180         rot_in_ch = ipu_idmac_get(priv->ipu, prp_channel[task].rot_in_ch);
 181         if (IS_ERR(rot_in_ch)) {
 182                 v4l2_err(&ic_priv->sd, "could not get IDMAC channel %u\n",
 183                          prp_channel[task].rot_in_ch);
 184                 ret = PTR_ERR(rot_in_ch);
 185                 goto out;
 186         }
 187         priv->rot_in_ch = rot_in_ch;
 188
 189         rot_out_ch = ipu_idmac_get(priv->ipu, prp_channel[task].rot_out_ch);
 190         if (IS_ERR(rot_out_ch)) {
 191                 v4l2_err(&ic_priv->sd, "could not get IDMAC channel %u\n",
 192                          prp_channel[task].rot_out_ch);
 193                 ret = PTR_ERR(rot_out_ch);
 194                 goto out;
 195         }
 196         priv->rot_out_ch = rot_out_ch;
 197
 198         return 0;
 199 out:
 200         prp_put_ipu_resources(priv);
 201         return ret;
 202 }
 203
 204 static void prp_vb2_buf_done(struct prp_priv *priv, struct ipuv3_channel *ch)
 205 {
 206         struct imx_media_video_dev *vdev = priv->vdev;
 207         struct imx_media_buffer *done, *next;
 208         struct vb2_buffer *vb;
 209         dma_addr_t phys;
 210
 211         done = priv->active_vb2_buf[priv->ipu_buf_num];
 212         if (done) {
 213                 done->vbuf.field = vdev->fmt.fmt.pix.field;
 214                 vb = &done->vbuf.vb2_buf;
 215                 vb->timestamp = ktime_get_ns();
 216                 vb2_buffer_done(vb, priv->nfb4eof ?
 217                                 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 218         }
 219
 220         priv->nfb4eof = false;
 221
 222         /* get next queued buffer */
 223         next = imx_media_capture_device_next_buf(vdev);
 224         if (next) {
 225                 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
 226                 priv->active_vb2_buf[priv->ipu_buf_num] = next;
 227         } else {
 228                 phys = priv->underrun_buf.phys;
 229                 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
 230         }
 231
 232         if (ipu_idmac_buffer_is_ready(ch, priv->ipu_buf_num))
 233                 ipu_idmac_clear_buffer(ch, priv->ipu_buf_num);
 234
 235         ipu_cpmem_set_buffer(ch, priv->ipu_buf_num, phys);
 236 }
 237
 238 static irqreturn_t prp_eof_interrupt(int irq, void *dev_id)
 239 {
 240         struct prp_priv *priv = dev_id;
 241         struct ipuv3_channel *channel;
 242
 243         spin_lock(&priv->irqlock);
 244
 245         if (priv->last_eof) {
 246                 complete(&priv->last_eof_comp);
 247                 priv->last_eof = false;
 248                 goto unlock;
 249         }
 250
 251         channel = (ipu_rot_mode_is_irt(priv->rot_mode)) ?
 252                 priv->rot_out_ch : priv->out_ch;
 253
 254         prp_vb2_buf_done(priv, channel);
 255
 256         /* select new IPU buf */
 257         ipu_idmac_select_buffer(channel, priv->ipu_buf_num);
 258         /* toggle IPU double-buffer index */
 259         priv->ipu_buf_num ^= 1;
 260
 261         /* bump the EOF timeout timer */
 262         mod_timer(&priv->eof_timeout_timer,
 263                   jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
 264
 265 unlock:
 266         spin_unlock(&priv->irqlock);
 267         return IRQ_HANDLED;
 268 }
 269
 270 static irqreturn_t prp_nfb4eof_interrupt(int irq, void *dev_id)
 271 {
 272         struct prp_priv *priv = dev_id;
 273         struct imx_ic_priv *ic_priv = priv->ic_priv;
 274
 275         spin_lock(&priv->irqlock);
 276
 277         /*
 278          * this is not an unrecoverable error, just mark
 279          * the next captured frame with vb2 error flag.
 280          */
 281         priv->nfb4eof = true;
 282
 283         v4l2_err(&ic_priv->sd, "NFB4EOF\n");
 284
 285         spin_unlock(&priv->irqlock);
 286
 287         return IRQ_HANDLED;
 288 }
 289
 290 /*
 291  * EOF timeout timer function.
 292  */
 293 /*
 294  * EOF timeout timer function. This is an unrecoverable condition
 295  * without a stream restart.
 296  */
 297 static void prp_eof_timeout(unsigned long data)
 298 {
 299         struct prp_priv *priv = (struct prp_priv *)data;
 300         struct imx_media_video_dev *vdev = priv->vdev;
 301         struct imx_ic_priv *ic_priv = priv->ic_priv;
 302
 303         v4l2_err(&ic_priv->sd, "EOF timeout\n");
 304
 305         /* signal a fatal error to capture device */
 306         imx_media_capture_device_error(vdev);
 307 }
 308
 309 static void prp_setup_vb2_buf(struct prp_priv *priv, dma_addr_t *phys)
 310 {
 311         struct imx_media_video_dev *vdev = priv->vdev;
 312         struct imx_media_buffer *buf;
 313         int i;
 314
 315         for (i = 0; i < 2; i++) {
 316                 buf = imx_media_capture_device_next_buf(vdev);
 317                 if (buf) {
 318                         priv->active_vb2_buf[i] = buf;
 319                         phys[i] = vb2_dma_contig_plane_dma_addr(
 320                                 &buf->vbuf.vb2_buf, 0);
 321                 } else {
 322                         priv->active_vb2_buf[i] = NULL;
 323                         phys[i] = priv->underrun_buf.phys;
 324                 }
 325         }
 326 }
 327
 328 static void prp_unsetup_vb2_buf(struct prp_priv *priv,
 329                                 enum vb2_buffer_state return_status)
 330 {
 331         struct imx_media_buffer *buf;
 332         int i;
 333
 334         /* return any remaining active frames with return_status */
 335         for (i = 0; i < 2; i++) {
 336                 buf = priv->active_vb2_buf[i];
 337                 if (buf) {
 338                         struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
 339
 340                         vb->timestamp = ktime_get_ns();
 341                         vb2_buffer_done(vb, return_status);
 342                 }
 343         }
 344 }
 345
 346 static int prp_setup_channel(struct prp_priv *priv,
 347                              struct ipuv3_channel *channel,
 348                              enum ipu_rotate_mode rot_mode,
 349                              dma_addr_t addr0, dma_addr_t addr1,
 350                              bool rot_swap_width_height)
 351 {
 352         struct imx_media_video_dev *vdev = priv->vdev;
 353         const struct imx_media_pixfmt *outcc;
 354         struct v4l2_mbus_framefmt *infmt;
 355         unsigned int burst_size;
 356         struct ipu_image image;
 357         int ret;
 358
 359         infmt = &priv->format_mbus[PRPENCVF_SINK_PAD];
 360         outcc = vdev->cc;
 361
 362         ipu_cpmem_zero(channel);
 363
 364         memset(&image, 0, sizeof(image));
 365         image.pix = vdev->fmt.fmt.pix;
 366         image.rect.width = image.pix.width;
 367         image.rect.height = image.pix.height;
 368
 369         if (rot_swap_width_height) {
 370                 swap(image.pix.width, image.pix.height);
 371                 swap(image.rect.width, image.rect.height);
 372                 /* recalc stride using swapped width */
 373                 image.pix.bytesperline = outcc->planar ?
 374                         image.pix.width :
 375                         (image.pix.width * outcc->bpp) >> 3;
 376         }
 377
 378         image.phys0 = addr0;
 379         image.phys1 = addr1;
 380
 381         if (channel == priv->out_ch || channel == priv->rot_out_ch) {
 382                 switch (image.pix.pixelformat) {
 383                 case V4L2_PIX_FMT_YUV420:
 384                 case V4L2_PIX_FMT_YVU420:
 385                 case V4L2_PIX_FMT_NV12:
 386                         /* Skip writing U and V components to odd rows */
 387                         ipu_cpmem_skip_odd_chroma_rows(channel);
 388                         break;
 389                 }
 390         }
 391
 392         ret = ipu_cpmem_set_image(channel, &image);
 393         if (ret)
 394                 return ret;
 395
 396         if (channel == priv->rot_in_ch ||
 397             channel == priv->rot_out_ch) {
 398                 burst_size = 8;
 399                 ipu_cpmem_set_block_mode(channel);
 400         } else {
 401                 burst_size = (image.pix.width & 0xf) ? 8 : 16;
 402         }
 403
 404         ipu_cpmem_set_burstsize(channel, burst_size);
 405
 406         if (rot_mode)
 407                 ipu_cpmem_set_rotation(channel, rot_mode);
 408
 409         if (image.pix.field == V4L2_FIELD_NONE &&
 410             V4L2_FIELD_HAS_BOTH(infmt->field) &&
 411             channel == priv->out_ch)
 412                 ipu_cpmem_interlaced_scan(channel, image.pix.bytesperline);
 413
 414         ret = ipu_ic_task_idma_init(priv->ic, channel,
 415                                     image.pix.width, image.pix.height,
 416                                     burst_size, rot_mode);
 417         if (ret)
 418                 return ret;
 419
 420         ipu_cpmem_set_axi_id(channel, 1);
 421
 422         ipu_idmac_set_double_buffer(channel, true);
 423
 424         return 0;
 425 }
 426
 427 static int prp_setup_rotation(struct prp_priv *priv)
 428 {
 429         struct imx_media_video_dev *vdev = priv->vdev;
 430         struct imx_ic_priv *ic_priv = priv->ic_priv;
 431         const struct imx_media_pixfmt *outcc, *incc;
 432         struct v4l2_mbus_framefmt *infmt;
 433         struct v4l2_pix_format *outfmt;
 434         dma_addr_t phys[2];
 435         int ret;
 436
 437         infmt = &priv->format_mbus[PRPENCVF_SINK_PAD];
 438         outfmt = &vdev->fmt.fmt.pix;
 439         incc = priv->cc[PRPENCVF_SINK_PAD];
 440         outcc = vdev->cc;
 441
 442         ret = imx_media_alloc_dma_buf(priv->md, &priv->rot_buf[0],
 443                                       outfmt->sizeimage);
 444         if (ret) {
 445                 v4l2_err(&ic_priv->sd, "failed to alloc rot_buf[0], %d\n", ret);
 446                 return ret;
 447         }
 448         ret = imx_media_alloc_dma_buf(priv->md, &priv->rot_buf[1],
 449                                       outfmt->sizeimage);
 450         if (ret) {
 451                 v4l2_err(&ic_priv->sd, "failed to alloc rot_buf[1], %d\n", ret);
 452                 goto free_rot0;
 453         }
 454
 455         ret = ipu_ic_task_init(priv->ic,
 456                                infmt->width, infmt->height,
 457                                outfmt->height, outfmt->width,
 458                                incc->cs, outcc->cs);
 459         if (ret) {
 460                 v4l2_err(&ic_priv->sd, "ipu_ic_task_init failed, %d\n", ret);
 461                 goto free_rot1;
 462         }
 463
 464         /* init the IC-PRP-->MEM IDMAC channel */
 465         ret = prp_setup_channel(priv, priv->out_ch, IPU_ROTATE_NONE,
 466                                 priv->rot_buf[0].phys, priv->rot_buf[1].phys,
 467                                 true);
 468         if (ret) {
 469                 v4l2_err(&ic_priv->sd,
 470                          "prp_setup_channel(out_ch) failed, %d\n", ret);
 471                 goto free_rot1;
 472         }
 473
 474         /* init the MEM-->IC-PRP ROT IDMAC channel */
 475         ret = prp_setup_channel(priv, priv->rot_in_ch, priv->rot_mode,
 476                                 priv->rot_buf[0].phys, priv->rot_buf[1].phys,
 477                                 true);
 478         if (ret) {
 479                 v4l2_err(&ic_priv->sd,
 480                          "prp_setup_channel(rot_in_ch) failed, %d\n", ret);
 481                 goto free_rot1;
 482         }
 483
 484         prp_setup_vb2_buf(priv, phys);
 485
 486         /* init the destination IC-PRP ROT-->MEM IDMAC channel */
 487         ret = prp_setup_channel(priv, priv->rot_out_ch, IPU_ROTATE_NONE,
 488                                 phys[0], phys[1],
 489                                 false);
 490         if (ret) {
 491                 v4l2_err(&ic_priv->sd,
 492                          "prp_setup_channel(rot_out_ch) failed, %d\n", ret);
 493                 goto unsetup_vb2;
 494         }
 495
 496         /* now link IC-PRP-->MEM to MEM-->IC-PRP ROT */
 497         ipu_idmac_link(priv->out_ch, priv->rot_in_ch);
 498
 499         /* enable the IC */
 500         ipu_ic_enable(priv->ic);
 501
 502         /* set buffers ready */
 503         ipu_idmac_select_buffer(priv->out_ch, 0);
 504         ipu_idmac_select_buffer(priv->out_ch, 1);
 505         ipu_idmac_select_buffer(priv->rot_out_ch, 0);
 506         ipu_idmac_select_buffer(priv->rot_out_ch, 1);
 507
 508         /* enable the channels */
 509         ipu_idmac_enable_channel(priv->out_ch);
 510         ipu_idmac_enable_channel(priv->rot_in_ch);
 511         ipu_idmac_enable_channel(priv->rot_out_ch);
 512
 513         /* and finally enable the IC PRP task */
 514         ipu_ic_task_enable(priv->ic);
 515
 516         return 0;
 517
 518 unsetup_vb2:
 519         prp_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
 520 free_rot1:
 521         imx_media_free_dma_buf(priv->md, &priv->rot_buf[1]);
 522 free_rot0:
 523         imx_media_free_dma_buf(priv->md, &priv->rot_buf[0]);
 524         return ret;
 525 }
 526
 527 static void prp_unsetup_rotation(struct prp_priv *priv)
 528 {
 529         ipu_ic_task_disable(priv->ic);
 530
 531         ipu_idmac_disable_channel(priv->out_ch);
 532         ipu_idmac_disable_channel(priv->rot_in_ch);
 533         ipu_idmac_disable_channel(priv->rot_out_ch);
 534
 535         ipu_idmac_unlink(priv->out_ch, priv->rot_in_ch);
 536
 537         ipu_ic_disable(priv->ic);
 538
 539         imx_media_free_dma_buf(priv->md, &priv->rot_buf[0]);
 540         imx_media_free_dma_buf(priv->md, &priv->rot_buf[1]);
 541 }
 542
 543 static int prp_setup_norotation(struct prp_priv *priv)
 544 {
 545         struct imx_media_video_dev *vdev = priv->vdev;
 546         struct imx_ic_priv *ic_priv = priv->ic_priv;
 547         const struct imx_media_pixfmt *outcc, *incc;
 548         struct v4l2_mbus_framefmt *infmt;
 549         struct v4l2_pix_format *outfmt;
 550         dma_addr_t phys[2];
 551         int ret;
 552
 553         infmt = &priv->format_mbus[PRPENCVF_SINK_PAD];
 554         outfmt = &vdev->fmt.fmt.pix;
 555         incc = priv->cc[PRPENCVF_SINK_PAD];
 556         outcc = vdev->cc;
 557
 558         ret = ipu_ic_task_init(priv->ic,
 559                                infmt->width, infmt->height,
 560                                outfmt->width, outfmt->height,
 561                                incc->cs, outcc->cs);
 562         if (ret) {
 563                 v4l2_err(&ic_priv->sd, "ipu_ic_task_init failed, %d\n", ret);
 564                 return ret;
 565         }
 566
 567         prp_setup_vb2_buf(priv, phys);
 568
 569         /* init the IC PRP-->MEM IDMAC channel */
 570         ret = prp_setup_channel(priv, priv->out_ch, priv->rot_mode,
 571                                 phys[0], phys[1], false);
 572         if (ret) {
 573                 v4l2_err(&ic_priv->sd,
 574                          "prp_setup_channel(out_ch) failed, %d\n", ret);
 575                 goto unsetup_vb2;
 576         }
 577
 578         ipu_cpmem_dump(priv->out_ch);
 579         ipu_ic_dump(priv->ic);
 580         ipu_dump(priv->ipu);
 581
 582         ipu_ic_enable(priv->ic);
 583
 584         /* set buffers ready */
 585         ipu_idmac_select_buffer(priv->out_ch, 0);
 586         ipu_idmac_select_buffer(priv->out_ch, 1);
 587
 588         /* enable the channels */
 589         ipu_idmac_enable_channel(priv->out_ch);
 590
 591         /* enable the IC task */
 592         ipu_ic_task_enable(priv->ic);
 593
 594         return 0;
 595
 596 unsetup_vb2:
 597         prp_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
 598         return ret;
 599 }
 600
 601 static void prp_unsetup_norotation(struct prp_priv *priv)
 602 {
 603         ipu_ic_task_disable(priv->ic);
 604         ipu_idmac_disable_channel(priv->out_ch);
 605         ipu_ic_disable(priv->ic);
 606 }
 607
 608 static void prp_unsetup(struct prp_priv *priv,
 609                         enum vb2_buffer_state state)
 610 {
 611         if (ipu_rot_mode_is_irt(priv->rot_mode))
 612                 prp_unsetup_rotation(priv);
 613         else
 614                 prp_unsetup_norotation(priv);
 615
 616         prp_unsetup_vb2_buf(priv, state);
 617 }
 618
 619 static int prp_start(struct prp_priv *priv)
 620 {
 621         struct imx_ic_priv *ic_priv = priv->ic_priv;
 622         struct imx_media_video_dev *vdev = priv->vdev;
 623         struct v4l2_pix_format *outfmt;
 624         int ret;
 625
 626         ret = prp_get_ipu_resources(priv);
 627         if (ret)
 628                 return ret;
 629
 630         outfmt = &vdev->fmt.fmt.pix;
 631
 632         ret = imx_media_alloc_dma_buf(priv->md, &priv->underrun_buf,
 633                                       outfmt->sizeimage);
 634         if (ret)
 635                 goto out_put_ipu;
 636
 637         priv->ipu_buf_num = 0;
 638
 639         /* init EOF completion waitq */
 640         init_completion(&priv->last_eof_comp);
 641         priv->last_eof = false;
 642         priv->nfb4eof = false;
 643
 644         if (ipu_rot_mode_is_irt(priv->rot_mode))
 645                 ret = prp_setup_rotation(priv);
 646         else
 647                 ret = prp_setup_norotation(priv);
 648         if (ret)
 649                 goto out_free_underrun;
 650
 651         priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
 652                                                   priv->out_ch,
 653                                                   IPU_IRQ_NFB4EOF);
 654         ret = devm_request_irq(ic_priv->dev, priv->nfb4eof_irq,
 655                                prp_nfb4eof_interrupt, 0,
 656                                "imx-ic-prp-nfb4eof", priv);
 657         if (ret) {
 658                 v4l2_err(&ic_priv->sd,
 659                          "Error registering NFB4EOF irq: %d\n", ret);
 660                 goto out_unsetup;
 661         }
 662
 663         if (ipu_rot_mode_is_irt(priv->rot_mode))
 664                 priv->eof_irq = ipu_idmac_channel_irq(
 665                         priv->ipu, priv->rot_out_ch, IPU_IRQ_EOF);
 666         else
 667                 priv->eof_irq = ipu_idmac_channel_irq(
 668                         priv->ipu, priv->out_ch, IPU_IRQ_EOF);
 669
 670         ret = devm_request_irq(ic_priv->dev, priv->eof_irq,
 671                                prp_eof_interrupt, 0,
 672                                "imx-ic-prp-eof", priv);
 673         if (ret) {
 674                 v4l2_err(&ic_priv->sd,
 675                          "Error registering eof irq: %d\n", ret);
 676                 goto out_free_nfb4eof_irq;
 677         }
 678
 679         /* start upstream */
 680         ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
 681         ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
 682         if (ret) {
 683                 v4l2_err(&ic_priv->sd,
 684                          "upstream stream on failed: %d\n", ret);
 685                 goto out_free_eof_irq;
 686         }
 687
 688         /* start the EOF timeout timer */
 689         mod_timer(&priv->eof_timeout_timer,
 690                   jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
 691
 692         return 0;
 693
 694 out_free_eof_irq:
 695         devm_free_irq(ic_priv->dev, priv->eof_irq, priv);
 696 out_free_nfb4eof_irq:
 697         devm_free_irq(ic_priv->dev, priv->nfb4eof_irq, priv);
 698 out_unsetup:
 699         prp_unsetup(priv, VB2_BUF_STATE_QUEUED);
 700 out_free_underrun:
 701         imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
 702 out_put_ipu:
 703         prp_put_ipu_resources(priv);
 704         return ret;
 705 }
 706
 707 static void prp_stop(struct prp_priv *priv)
 708 {
 709         struct imx_ic_priv *ic_priv = priv->ic_priv;
 710         unsigned long flags;
 711         int ret;
 712
 713         /* mark next EOF interrupt as the last before stream off */
 714         spin_lock_irqsave(&priv->irqlock, flags);
 715         priv->last_eof = true;
 716         spin_unlock_irqrestore(&priv->irqlock, flags);
 717
 718         /*
 719          * and then wait for interrupt handler to mark completion.
 720          */
 721         ret = wait_for_completion_timeout(
 722                 &priv->last_eof_comp,
 723                 msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
 724         if (ret == 0)
 725                 v4l2_warn(&ic_priv->sd, "wait last EOF timeout\n");
 726
 727         /* stop upstream */
 728         ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
 729         if (ret && ret != -ENOIOCTLCMD)
 730                 v4l2_warn(&ic_priv->sd,
 731                           "upstream stream off failed: %d\n", ret);
 732
 733         devm_free_irq(ic_priv->dev, priv->eof_irq, priv);
 734         devm_free_irq(ic_priv->dev, priv->nfb4eof_irq, priv);
 735
 736         prp_unsetup(priv, VB2_BUF_STATE_ERROR);
 737
 738         imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
 739
 740         /* cancel the EOF timeout timer */
 741         del_timer_sync(&priv->eof_timeout_timer);
 742
 743         prp_put_ipu_resources(priv);
 744 }
 745
 746 static struct v4l2_mbus_framefmt *
 747 __prp_get_fmt(struct prp_priv *priv, struct v4l2_subdev_pad_config *cfg,
 748               unsigned int pad, enum v4l2_subdev_format_whence which)
 749 {
 750         struct imx_ic_priv *ic_priv = priv->ic_priv;
 751
 752         if (which == V4L2_SUBDEV_FORMAT_TRY)
 753                 return v4l2_subdev_get_try_format(&ic_priv->sd, cfg, pad);
 754         else
 755                 return &priv->format_mbus[pad];
 756 }
 757
 758 /*
 759  * Applies IC resizer and IDMAC alignment restrictions to output
 760  * rectangle given the input rectangle, and depending on given
 761  * rotation mode.
 762  *
 763  * The IC resizer cannot downsize more than 4:1. Note also that
 764  * for 90 or 270 rotation, _both_ output width and height must
 765  * be aligned by W_ALIGN_SRC, because the intermediate rotation
 766  * buffer swaps output width/height, and the final output buffer
 767  * does not.
 768  *
 769  * Returns true if the output rectangle was modified.
 770  */
 771 static bool prp_bound_align_output(struct v4l2_mbus_framefmt *outfmt,
 772                                    struct v4l2_mbus_framefmt *infmt,
 773                                    enum ipu_rotate_mode rot_mode)
 774 {
 775         u32 orig_width = outfmt->width;
 776         u32 orig_height = outfmt->height;
 777
 778         if (ipu_rot_mode_is_irt(rot_mode))
 779                 v4l_bound_align_image(&outfmt->width,
 780                                       infmt->height / 4, MAX_H_SRC,
 781                                       W_ALIGN_SRC,
 782                                       &outfmt->height,
 783                                       infmt->width / 4, MAX_W_SRC,
 784                                       W_ALIGN_SRC, S_ALIGN);
 785         else
 786                 v4l_bound_align_image(&outfmt->width,
 787                                       infmt->width / 4, MAX_W_SRC,
 788                                       W_ALIGN_SRC,
 789                                       &outfmt->height,
 790                                       infmt->height / 4, MAX_H_SRC,
 791                                       H_ALIGN_SRC, S_ALIGN);
 792
 793         return outfmt->width != orig_width || outfmt->height != orig_height;
 794 }
 795
 796 /*
 797  * V4L2 subdev operations.
 798  */
 799
 800 static int prp_enum_mbus_code(struct v4l2_subdev *sd,
 801                               struct v4l2_subdev_pad_config *cfg,
 802                               struct v4l2_subdev_mbus_code_enum *code)
 803 {
 804         if (code->pad >= PRPENCVF_NUM_PADS)
 805                 return -EINVAL;
 806
 807         return imx_media_enum_ipu_format(&code->code, code->index, CS_SEL_ANY);
 808 }
 809
 810 static int prp_get_fmt(struct v4l2_subdev *sd,
 811                        struct v4l2_subdev_pad_config *cfg,
 812                        struct v4l2_subdev_format *sdformat)
 813 {
 814         struct prp_priv *priv = sd_to_priv(sd);
 815         struct v4l2_mbus_framefmt *fmt;
 816         int ret = 0;
 817
 818         if (sdformat->pad >= PRPENCVF_NUM_PADS)
 819                 return -EINVAL;
 820
 821         mutex_lock(&priv->lock);
 822
 823         fmt = __prp_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
 824         if (!fmt) {
 825                 ret = -EINVAL;
 826                 goto out;
 827         }
 828
 829         sdformat->format = *fmt;
 830 out:
 831         mutex_unlock(&priv->lock);
 832         return ret;
 833 }
 834
 835 static void prp_try_fmt(struct prp_priv *priv,
 836                         struct v4l2_subdev_pad_config *cfg,
 837                         struct v4l2_subdev_format *sdformat,
 838                         const struct imx_media_pixfmt **cc)
 839 {
 840         struct v4l2_mbus_framefmt *infmt;
 841
 842         *cc = imx_media_find_ipu_format(sdformat->format.code, CS_SEL_ANY);
 843         if (!*cc) {
 844                 u32 code;
 845
 846                 imx_media_enum_ipu_format(&code, 0, CS_SEL_ANY);
 847                 *cc = imx_media_find_ipu_format(code, CS_SEL_ANY);
 848                 sdformat->format.code = (*cc)->codes[0];
 849         }
 850
 851         infmt = __prp_get_fmt(priv, cfg, PRPENCVF_SINK_PAD, sdformat->which);
 852
 853         if (sdformat->pad == PRPENCVF_SRC_PAD) {
 854                 if (sdformat->format.field != V4L2_FIELD_NONE)
 855                         sdformat->format.field = infmt->field;
 856
 857                 prp_bound_align_output(&sdformat->format, infmt,
 858                                        priv->rot_mode);
 859
 860                 /* propagate colorimetry from sink */
 861                 sdformat->format.colorspace = infmt->colorspace;
 862                 sdformat->format.xfer_func = infmt->xfer_func;
 863                 sdformat->format.quantization = infmt->quantization;
 864                 sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
 865         } else {
 866                 v4l_bound_align_image(&sdformat->format.width,
 867                                       MIN_W_SINK, MAX_W_SINK, W_ALIGN_SINK,
 868                                       &sdformat->format.height,
 869                                       MIN_H_SINK, MAX_H_SINK, H_ALIGN_SINK,
 870                                       S_ALIGN);
 871
 872                 imx_media_fill_default_mbus_fields(&sdformat->format, infmt,
 873                                                    true);
 874         }
 875 }
 876
 877 static int prp_set_fmt(struct v4l2_subdev *sd,
 878                        struct v4l2_subdev_pad_config *cfg,
 879                        struct v4l2_subdev_format *sdformat)
 880 {
 881         struct prp_priv *priv = sd_to_priv(sd);
 882         struct imx_media_video_dev *vdev = priv->vdev;
 883         const struct imx_media_pixfmt *cc;
 884         struct v4l2_pix_format vdev_fmt;
 885         struct v4l2_mbus_framefmt *fmt;
 886         int ret = 0;
 887
 888         if (sdformat->pad >= PRPENCVF_NUM_PADS)
 889                 return -EINVAL;
 890
 891         mutex_lock(&priv->lock);
 892
 893         if (priv->stream_count > 0) {
 894                 ret = -EBUSY;
 895                 goto out;
 896         }
 897
 898         prp_try_fmt(priv, cfg, sdformat, &cc);
 899
 900         fmt = __prp_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
 901         *fmt = sdformat->format;
 902
 903         /* propagate a default format to source pad */
 904         if (sdformat->pad == PRPENCVF_SINK_PAD) {
 905                 const struct imx_media_pixfmt *outcc;
 906                 struct v4l2_mbus_framefmt *outfmt;
 907                 struct v4l2_subdev_format format;
 908
 909                 format.pad = PRPENCVF_SRC_PAD;
 910                 format.which = sdformat->which;
 911                 format.format = sdformat->format;
 912                 prp_try_fmt(priv, cfg, &format, &outcc);
 913
 914                 outfmt = __prp_get_fmt(priv, cfg, PRPENCVF_SRC_PAD,
 915                                        sdformat->which);
 916                 *outfmt = format.format;
 917                 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 918                         priv->cc[PRPENCVF_SRC_PAD] = outcc;
 919         }
 920
 921         if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY)
 922                 goto out;
 923
 924         priv->cc[sdformat->pad] = cc;
 925
 926         /* propagate output pad format to capture device */
 927         imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt,
 928                                       &priv->format_mbus[PRPENCVF_SRC_PAD],
 929                                       priv->cc[PRPENCVF_SRC_PAD]);
 930         mutex_unlock(&priv->lock);
 931         imx_media_capture_device_set_format(vdev, &vdev_fmt);
 932
 933         return 0;
 934 out:
 935         mutex_unlock(&priv->lock);
 936         return ret;
 937 }
 938
 939 static int prp_enum_frame_size(struct v4l2_subdev *sd,
 940                                struct v4l2_subdev_pad_config *cfg,
 941                                struct v4l2_subdev_frame_size_enum *fse)
 942 {
 943         struct prp_priv *priv = sd_to_priv(sd);
 944         struct v4l2_subdev_format format = {0};
 945         const struct imx_media_pixfmt *cc;
 946         int ret = 0;
 947
 948         if (fse->pad >= PRPENCVF_NUM_PADS || fse->index != 0)
 949                 return -EINVAL;
 950
 951         mutex_lock(&priv->lock);
 952
 953         format.pad = fse->pad;
 954         format.which = fse->which;
 955         format.format.code = fse->code;
 956         format.format.width = 1;
 957         format.format.height = 1;
 958         prp_try_fmt(priv, cfg, &format, &cc);
 959         fse->min_width = format.format.width;
 960         fse->min_height = format.format.height;
 961
 962         if (format.format.code != fse->code) {
 963                 ret = -EINVAL;
 964                 goto out;
 965         }
 966
 967         format.format.code = fse->code;
 968         format.format.width = -1;
 969         format.format.height = -1;
 970         prp_try_fmt(priv, cfg, &format, &cc);
 971         fse->max_width = format.format.width;
 972         fse->max_height = format.format.height;
 973 out:
 974         mutex_unlock(&priv->lock);
 975         return ret;
 976 }
 977
 978 static int prp_link_setup(struct media_entity *entity,
 979                           const struct media_pad *local,
 980                           const struct media_pad *remote, u32 flags)
 981 {
 982         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 983         struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
 984         struct prp_priv *priv = ic_priv->task_priv;
 985         struct v4l2_subdev *remote_sd;
 986         int ret = 0;
 987
 988         dev_dbg(ic_priv->dev, "link setup %s -> %s", remote->entity->name,
 989                 local->entity->name);
 990
 991         mutex_lock(&priv->lock);
 992
 993         if (local->flags & MEDIA_PAD_FL_SINK) {
 994                 if (!is_media_entity_v4l2_subdev(remote->entity)) {
 995                         ret = -EINVAL;
 996                         goto out;
 997                 }
 998
 999                 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
1000
1001                 if (flags & MEDIA_LNK_FL_ENABLED) {
1002                         if (priv->src_sd) {
1003                                 ret = -EBUSY;
1004                                 goto out;
1005                         }
1006                         priv->src_sd = remote_sd;
1007                 } else {
1008                         priv->src_sd = NULL;
1009                 }
1010
1011                 goto out;
1012         }
1013
1014         /* this is the source pad */
1015
1016         /* the remote must be the device node */
1017         if (!is_media_entity_v4l2_video_device(remote->entity)) {
1018                 ret = -EINVAL;
1019                 goto out;
1020         }
1021
1022         if (flags & MEDIA_LNK_FL_ENABLED) {
1023                 if (priv->sink) {
1024                         ret = -EBUSY;
1025                         goto out;
1026                 }
1027         } else {
1028                 priv->sink = NULL;
1029                 goto out;
1030         }
1031
1032         priv->sink = remote->entity;
1033 out:
1034         mutex_unlock(&priv->lock);
1035         return ret;
1036 }
1037
1038 static int prp_s_ctrl(struct v4l2_ctrl *ctrl)
1039 {
1040         struct prp_priv *priv = container_of(ctrl->handler,
1041                                                struct prp_priv, ctrl_hdlr);
1042         struct imx_ic_priv *ic_priv = priv->ic_priv;
1043         enum ipu_rotate_mode rot_mode;
1044         int rotation, ret = 0;
1045         bool hflip, vflip;
1046
1047         mutex_lock(&priv->lock);
1048
1049         rotation = priv->rotation;
1050         hflip = priv->hflip;
1051         vflip = priv->vflip;
1052
1053         switch (ctrl->id) {
1054         case V4L2_CID_HFLIP:
1055                 hflip = (ctrl->val == 1);
1056                 break;
1057         case V4L2_CID_VFLIP:
1058                 vflip = (ctrl->val == 1);
1059                 break;
1060         case V4L2_CID_ROTATE:
1061                 rotation = ctrl->val;
1062                 break;
1063         default:
1064                 v4l2_err(&ic_priv->sd, "Invalid control\n");
1065                 ret = -EINVAL;
1066                 goto out;
1067         }
1068
1069         ret = ipu_degrees_to_rot_mode(&rot_mode, rotation, hflip, vflip);
1070         if (ret)
1071                 goto out;
1072
1073         if (rot_mode != priv->rot_mode) {
1074                 struct v4l2_mbus_framefmt outfmt, infmt;
1075
1076                 /* can't change rotation mid-streaming */
1077                 if (priv->stream_count > 0) {
1078                         ret = -EBUSY;
1079                         goto out;
1080                 }
1081
1082                 outfmt = priv->format_mbus[PRPENCVF_SRC_PAD];
1083                 infmt = priv->format_mbus[PRPENCVF_SINK_PAD];
1084
1085                 if (prp_bound_align_output(&outfmt, &infmt, rot_mode)) {
1086                         ret = -EINVAL;
1087                         goto out;
1088                 }
1089
1090                 priv->rot_mode = rot_mode;
1091                 priv->rotation = rotation;
1092                 priv->hflip = hflip;
1093                 priv->vflip = vflip;
1094         }
1095
1096 out:
1097         mutex_unlock(&priv->lock);
1098         return ret;
1099 }
1100
1101 static const struct v4l2_ctrl_ops prp_ctrl_ops = {
1102         .s_ctrl = prp_s_ctrl,
1103 };
1104
1105 static int prp_init_controls(struct prp_priv *priv)
1106 {
1107         struct imx_ic_priv *ic_priv = priv->ic_priv;
1108         struct v4l2_ctrl_handler *hdlr = &priv->ctrl_hdlr;
1109         int ret;
1110
1111         v4l2_ctrl_handler_init(hdlr, 3);
1112
1113         v4l2_ctrl_new_std(hdlr, &prp_ctrl_ops, V4L2_CID_HFLIP,
1114                           0, 1, 1, 0);
1115         v4l2_ctrl_new_std(hdlr, &prp_ctrl_ops, V4L2_CID_VFLIP,
1116                           0, 1, 1, 0);
1117         v4l2_ctrl_new_std(hdlr, &prp_ctrl_ops, V4L2_CID_ROTATE,
1118                           0, 270, 90, 0);
1119
1120         ic_priv->sd.ctrl_handler = hdlr;
1121
1122         if (hdlr->error) {
1123                 ret = hdlr->error;
1124                 goto out_free;
1125         }
1126
1127         v4l2_ctrl_handler_setup(hdlr);
1128         return 0;
1129
1130 out_free:
1131         v4l2_ctrl_handler_free(hdlr);
1132         return ret;
1133 }
1134
1135 static int prp_s_stream(struct v4l2_subdev *sd, int enable)
1136 {
1137         struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
1138         struct prp_priv *priv = ic_priv->task_priv;
1139         int ret = 0;
1140
1141         mutex_lock(&priv->lock);
1142
1143         if (!priv->src_sd || !priv->sink) {
1144                 ret = -EPIPE;
1145                 goto out;
1146         }
1147
1148         /*
1149          * enable/disable streaming only if stream_count is
1150          * going from 0 to 1 / 1 to 0.
1151          */
1152         if (priv->stream_count != !enable)
1153                 goto update_count;
1154
1155         dev_dbg(ic_priv->dev, "stream %s\n", enable ? "ON" : "OFF");
1156
1157         if (enable)
1158                 ret = prp_start(priv);
1159         else
1160                 prp_stop(priv);
1161         if (ret)
1162                 goto out;
1163
1164 update_count:
1165         priv->stream_count += enable ? 1 : -1;
1166         if (priv->stream_count < 0)
1167                 priv->stream_count = 0;
1168 out:
1169         mutex_unlock(&priv->lock);
1170         return ret;
1171 }
1172
1173 static int prp_g_frame_interval(struct v4l2_subdev *sd,
1174                                 struct v4l2_subdev_frame_interval *fi)
1175 {
1176         struct prp_priv *priv = sd_to_priv(sd);
1177
1178         if (fi->pad >= PRPENCVF_NUM_PADS)
1179                 return -EINVAL;
1180
1181         mutex_lock(&priv->lock);
1182         fi->interval = priv->frame_interval;
1183         mutex_unlock(&priv->lock);
1184
1185         return 0;
1186 }
1187
1188 static int prp_s_frame_interval(struct v4l2_subdev *sd,
1189                                 struct v4l2_subdev_frame_interval *fi)
1190 {
1191         struct prp_priv *priv = sd_to_priv(sd);
1192
1193         if (fi->pad >= PRPENCVF_NUM_PADS)
1194                 return -EINVAL;
1195
1196         /* No limits on frame interval */
1197         mutex_lock(&priv->lock);
1198         priv->frame_interval = fi->interval;
1199         mutex_unlock(&priv->lock);
1200
1201         return 0;
1202 }
1203
1204 /*
1205  * retrieve our pads parsed from the OF graph by the media device
1206  */
1207 static int prp_registered(struct v4l2_subdev *sd)
1208 {
1209         struct prp_priv *priv = sd_to_priv(sd);
1210         int i, ret;
1211         u32 code;
1212
1213         /* get media device */
1214         priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
1215
1216         for (i = 0; i < PRPENCVF_NUM_PADS; i++) {
1217                 priv->pad[i].flags = (i == PRPENCVF_SINK_PAD) ?
1218                         MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
1219
1220                 /* set a default mbus format  */
1221                 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
1222                 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1223                                               640, 480, code, V4L2_FIELD_NONE,
1224                                               &priv->cc[i]);
1225                 if (ret)
1226                         return ret;
1227         }
1228
1229         /* init default frame interval */
1230         priv->frame_interval.numerator = 1;
1231         priv->frame_interval.denominator = 30;
1232
1233         ret = media_entity_pads_init(&sd->entity, PRPENCVF_NUM_PADS,
1234                                      priv->pad);
1235         if (ret)
1236                 return ret;
1237
1238         ret = imx_media_capture_device_register(priv->vdev);
1239         if (ret)
1240                 return ret;
1241
1242         ret = imx_media_add_video_device(priv->md, priv->vdev);
1243         if (ret)
1244                 goto unreg;
1245
1246         ret = prp_init_controls(priv);
1247         if (ret)
1248                 goto unreg;
1249
1250         return 0;
1251 unreg:
1252         imx_media_capture_device_unregister(priv->vdev);
1253         return ret;
1254 }
1255
1256 static void prp_unregistered(struct v4l2_subdev *sd)
1257 {
1258         struct prp_priv *priv = sd_to_priv(sd);
1259
1260         imx_media_capture_device_unregister(priv->vdev);
1261         v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1262 }
1263
1264 static const struct v4l2_subdev_pad_ops prp_pad_ops = {
1265         .enum_mbus_code = prp_enum_mbus_code,
1266         .enum_frame_size = prp_enum_frame_size,
1267         .get_fmt = prp_get_fmt,
1268         .set_fmt = prp_set_fmt,
1269 };
1270
1271 static const struct v4l2_subdev_video_ops prp_video_ops = {
1272         .g_frame_interval = prp_g_frame_interval,
1273         .s_frame_interval = prp_s_frame_interval,
1274         .s_stream = prp_s_stream,
1275 };
1276
1277 static const struct media_entity_operations prp_entity_ops = {
1278         .link_setup = prp_link_setup,
1279         .link_validate = v4l2_subdev_link_validate,
1280 };
1281
1282 static const struct v4l2_subdev_ops prp_subdev_ops = {
1283         .video = &prp_video_ops,
1284         .pad = &prp_pad_ops,
1285 };
1286
1287 static const struct v4l2_subdev_internal_ops prp_internal_ops = {
1288         .registered = prp_registered,
1289         .unregistered = prp_unregistered,
1290 };
1291
1292 static int prp_init(struct imx_ic_priv *ic_priv)
1293 {
1294         struct prp_priv *priv;
1295
1296         priv = devm_kzalloc(ic_priv->dev, sizeof(*priv), GFP_KERNEL);
1297         if (!priv)
1298                 return -ENOMEM;
1299
1300         ic_priv->task_priv = priv;
1301         priv->ic_priv = ic_priv;
1302
1303         spin_lock_init(&priv->irqlock);
1304         setup_timer(&priv->eof_timeout_timer, prp_eof_timeout,
1305                     (unsigned long)priv);
1306
1307         priv->vdev = imx_media_capture_device_init(&ic_priv->sd,
1308                                                    PRPENCVF_SRC_PAD);
1309         if (IS_ERR(priv->vdev))
1310                 return PTR_ERR(priv->vdev);
1311
1312         mutex_init(&priv->lock);
1313
1314         return 0;
1315 }
1316
1317 static void prp_remove(struct imx_ic_priv *ic_priv)
1318 {
1319         struct prp_priv *priv = ic_priv->task_priv;
1320
1321         mutex_destroy(&priv->lock);
1322         imx_media_capture_device_remove(priv->vdev);
1323 }
1324
1325 struct imx_ic_ops imx_ic_prpencvf_ops = {
1326         .subdev_ops = &prp_subdev_ops,
1327         .internal_ops = &prp_internal_ops,
1328         .entity_ops = &prp_entity_ops,
1329         .init = prp_init,
1330         .remove = prp_remove,
1331 };