drivers/media/platform/coda/coda-common.c

   1 /*
   2  * Coda multi-standard codec IP
   3  *
   4  * Copyright (C) 2012 Vista Silicon S.L.
   5  *    Javier Martin, <javier.martin@vista-silicon.com>
   6  *    Xavier Duret
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/debugfs.h>
  16 #include <linux/delay.h>
  17 #include <linux/firmware.h>
  18 #include <linux/gcd.h>
  19 #include <linux/genalloc.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/io.h>
  22 #include <linux/irq.h>
  23 #include <linux/kfifo.h>
  24 #include <linux/module.h>
  25 #include <linux/of_device.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/slab.h>
  29 #include <linux/videodev2.h>
  30 #include <linux/of.h>
  31 #include <linux/platform_data/coda.h>
  32 #include <linux/reset.h>
  33
  34 #include <media/v4l2-ctrls.h>
  35 #include <media/v4l2-device.h>
  36 #include <media/v4l2-event.h>
  37 #include <media/v4l2-ioctl.h>
  38 #include <media/v4l2-mem2mem.h>
  39 #include <media/videobuf2-v4l2.h>
  40 #include <media/videobuf2-dma-contig.h>
  41 #include <media/videobuf2-vmalloc.h>
  42
  43 #include "coda.h"
  44
  45 #define CODA_NAME               "coda"
  46
  47 #define CODADX6_MAX_INSTANCES   4
  48 #define CODA_MAX_FORMATS        4
  49
  50 #define CODA_ISRAM_SIZE (2048 * 2)
  51
  52 #define MIN_W 176
  53 #define MIN_H 144
  54
  55 #define S_ALIGN         1 /* multiple of 2 */
  56 #define W_ALIGN         1 /* multiple of 2 */
  57 #define H_ALIGN         1 /* multiple of 2 */
  58
  59 #define fh_to_ctx(__fh) container_of(__fh, struct coda_ctx, fh)
  60
  61 int coda_debug;
  62 module_param(coda_debug, int, 0644);
  63 MODULE_PARM_DESC(coda_debug, "Debug level (0-2)");
  64
  65 static int disable_tiling;
  66 module_param(disable_tiling, int, 0644);
  67 MODULE_PARM_DESC(disable_tiling, "Disable tiled frame buffers");
  68
  69 void coda_write(struct coda_dev *dev, u32 data, u32 reg)
  70 {
  71         v4l2_dbg(2, coda_debug, &dev->v4l2_dev,
  72                  "%s: data=0x%x, reg=0x%x\n", __func__, data, reg);
  73         writel(data, dev->regs_base + reg);
  74 }
  75
  76 unsigned int coda_read(struct coda_dev *dev, u32 reg)
  77 {
  78         u32 data;
  79
  80         data = readl(dev->regs_base + reg);
  81         v4l2_dbg(2, coda_debug, &dev->v4l2_dev,
  82                  "%s: data=0x%x, reg=0x%x\n", __func__, data, reg);
  83         return data;
  84 }
  85
  86 void coda_write_base(struct coda_ctx *ctx, struct coda_q_data *q_data,
  87                      struct vb2_v4l2_buffer *buf, unsigned int reg_y)
  88 {
  89         u32 base_y = vb2_dma_contig_plane_dma_addr(&buf->vb2_buf, 0);
  90         u32 base_cb, base_cr;
  91
  92         switch (q_data->fourcc) {
  93         case V4L2_PIX_FMT_NV12:
  94         case V4L2_PIX_FMT_YUV420:
  95         default:
  96                 base_cb = base_y + q_data->bytesperline * q_data->height;
  97                 base_cr = base_cb + q_data->bytesperline * q_data->height / 4;
  98                 break;
  99         case V4L2_PIX_FMT_YVU420:
 100                 /* Switch Cb and Cr for YVU420 format */
 101                 base_cr = base_y + q_data->bytesperline * q_data->height;
 102                 base_cb = base_cr + q_data->bytesperline * q_data->height / 4;
 103                 break;
 104         case V4L2_PIX_FMT_YUV422P:
 105                 base_cb = base_y + q_data->bytesperline * q_data->height;
 106                 base_cr = base_cb + q_data->bytesperline * q_data->height / 2;
 107         }
 108
 109         coda_write(ctx->dev, base_y, reg_y);
 110         coda_write(ctx->dev, base_cb, reg_y + 4);
 111         coda_write(ctx->dev, base_cr, reg_y + 8);
 112 }
 113
 114 #define CODA_CODEC(mode, src_fourcc, dst_fourcc, max_w, max_h) \
 115         { mode, src_fourcc, dst_fourcc, max_w, max_h }
 116
 117 /*
 118  * Arrays of codecs supported by each given version of Coda:
 119  *  i.MX27 -> codadx6
 120  *  i.MX5x -> coda7
 121  *  i.MX6  -> coda960
 122  * Use V4L2_PIX_FMT_YUV420 as placeholder for all supported YUV 4:2:0 variants
 123  */
 124 static const struct coda_codec codadx6_codecs[] = {
 125         CODA_CODEC(CODADX6_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,  720, 576),
 126         CODA_CODEC(CODADX6_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4, 720, 576),
 127 };
 128
 129 static const struct coda_codec coda7_codecs[] = {
 130         CODA_CODEC(CODA7_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1280, 720),
 131         CODA_CODEC(CODA7_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1280, 720),
 132         CODA_CODEC(CODA7_MODE_ENCODE_MJPG, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_JPEG,   8192, 8192),
 133         CODA_CODEC(CODA7_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
 134         CODA_CODEC(CODA7_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 135         CODA_CODEC(CODA7_MODE_DECODE_MJPG, V4L2_PIX_FMT_JPEG,   V4L2_PIX_FMT_YUV420, 8192, 8192),
 136 };
 137
 138 static const struct coda_codec coda9_codecs[] = {
 139         CODA_CODEC(CODA9_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1920, 1088),
 140         CODA_CODEC(CODA9_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1920, 1088),
 141         CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
 142         CODA_CODEC(CODA9_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 143 };
 144
 145 struct coda_video_device {
 146         const char *name;
 147         enum coda_inst_type type;
 148         const struct coda_context_ops *ops;
 149         bool direct;
 150         u32 src_formats[CODA_MAX_FORMATS];
 151         u32 dst_formats[CODA_MAX_FORMATS];
 152 };
 153
 154 static const struct coda_video_device coda_bit_encoder = {
 155         .name = "coda-encoder",
 156         .type = CODA_INST_ENCODER,
 157         .ops = &coda_bit_encode_ops,
 158         .src_formats = {
 159                 V4L2_PIX_FMT_NV12,
 160                 V4L2_PIX_FMT_YUV420,
 161                 V4L2_PIX_FMT_YVU420,
 162         },
 163         .dst_formats = {
 164                 V4L2_PIX_FMT_H264,
 165                 V4L2_PIX_FMT_MPEG4,
 166         },
 167 };
 168
 169 static const struct coda_video_device coda_bit_jpeg_encoder = {
 170         .name = "coda-jpeg-encoder",
 171         .type = CODA_INST_ENCODER,
 172         .ops = &coda_bit_encode_ops,
 173         .src_formats = {
 174                 V4L2_PIX_FMT_NV12,
 175                 V4L2_PIX_FMT_YUV420,
 176                 V4L2_PIX_FMT_YVU420,
 177                 V4L2_PIX_FMT_YUV422P,
 178         },
 179         .dst_formats = {
 180                 V4L2_PIX_FMT_JPEG,
 181         },
 182 };
 183
 184 static const struct coda_video_device coda_bit_decoder = {
 185         .name = "coda-decoder",
 186         .type = CODA_INST_DECODER,
 187         .ops = &coda_bit_decode_ops,
 188         .src_formats = {
 189                 V4L2_PIX_FMT_H264,
 190                 V4L2_PIX_FMT_MPEG4,
 191         },
 192         .dst_formats = {
 193                 V4L2_PIX_FMT_NV12,
 194                 V4L2_PIX_FMT_YUV420,
 195                 V4L2_PIX_FMT_YVU420,
 196         },
 197 };
 198
 199 static const struct coda_video_device coda_bit_jpeg_decoder = {
 200         .name = "coda-jpeg-decoder",
 201         .type = CODA_INST_DECODER,
 202         .ops = &coda_bit_decode_ops,
 203         .src_formats = {
 204                 V4L2_PIX_FMT_JPEG,
 205         },
 206         .dst_formats = {
 207                 V4L2_PIX_FMT_NV12,
 208                 V4L2_PIX_FMT_YUV420,
 209                 V4L2_PIX_FMT_YVU420,
 210                 V4L2_PIX_FMT_YUV422P,
 211         },
 212 };
 213
 214 static const struct coda_video_device *codadx6_video_devices[] = {
 215         &coda_bit_encoder,
 216 };
 217
 218 static const struct coda_video_device *coda7_video_devices[] = {
 219         &coda_bit_jpeg_encoder,
 220         &coda_bit_jpeg_decoder,
 221         &coda_bit_encoder,
 222         &coda_bit_decoder,
 223 };
 224
 225 static const struct coda_video_device *coda9_video_devices[] = {
 226         &coda_bit_encoder,
 227         &coda_bit_decoder,
 228 };
 229
 230 /*
 231  * Normalize all supported YUV 4:2:0 formats to the value used in the codec
 232  * tables.
 233  */
 234 static u32 coda_format_normalize_yuv(u32 fourcc)
 235 {
 236         switch (fourcc) {
 237         case V4L2_PIX_FMT_NV12:
 238         case V4L2_PIX_FMT_YUV420:
 239         case V4L2_PIX_FMT_YVU420:
 240         case V4L2_PIX_FMT_YUV422P:
 241                 return V4L2_PIX_FMT_YUV420;
 242         default:
 243                 return fourcc;
 244         }
 245 }
 246
 247 static const struct coda_codec *coda_find_codec(struct coda_dev *dev,
 248                                                 int src_fourcc, int dst_fourcc)
 249 {
 250         const struct coda_codec *codecs = dev->devtype->codecs;
 251         int num_codecs = dev->devtype->num_codecs;
 252         int k;
 253
 254         src_fourcc = coda_format_normalize_yuv(src_fourcc);
 255         dst_fourcc = coda_format_normalize_yuv(dst_fourcc);
 256         if (src_fourcc == dst_fourcc)
 257                 return NULL;
 258
 259         for (k = 0; k < num_codecs; k++) {
 260                 if (codecs[k].src_fourcc == src_fourcc &&
 261                     codecs[k].dst_fourcc == dst_fourcc)
 262                         break;
 263         }
 264
 265         if (k == num_codecs)
 266                 return NULL;
 267
 268         return &codecs[k];
 269 }
 270
 271 static void coda_get_max_dimensions(struct coda_dev *dev,
 272                                     const struct coda_codec *codec,
 273                                     int *max_w, int *max_h)
 274 {
 275         const struct coda_codec *codecs = dev->devtype->codecs;
 276         int num_codecs = dev->devtype->num_codecs;
 277         unsigned int w, h;
 278         int k;
 279
 280         if (codec) {
 281                 w = codec->max_w;
 282                 h = codec->max_h;
 283         } else {
 284                 for (k = 0, w = 0, h = 0; k < num_codecs; k++) {
 285                         w = max(w, codecs[k].max_w);
 286                         h = max(h, codecs[k].max_h);
 287                 }
 288         }
 289
 290         if (max_w)
 291                 *max_w = w;
 292         if (max_h)
 293                 *max_h = h;
 294 }
 295
 296 const struct coda_video_device *to_coda_video_device(struct video_device *vdev)
 297 {
 298         struct coda_dev *dev = video_get_drvdata(vdev);
 299         unsigned int i = vdev - dev->vfd;
 300
 301         if (i >= dev->devtype->num_vdevs)
 302                 return NULL;
 303
 304         return dev->devtype->vdevs[i];
 305 }
 306
 307 const char *coda_product_name(int product)
 308 {
 309         static char buf[9];
 310
 311         switch (product) {
 312         case CODA_DX6:
 313                 return "CodaDx6";
 314         case CODA_7541:
 315                 return "CODA7541";
 316         case CODA_960:
 317                 return "CODA960";
 318         default:
 319                 snprintf(buf, sizeof(buf), "(0x%04x)", product);
 320                 return buf;
 321         }
 322 }
 323
 324 /*
 325  * V4L2 ioctl() operations.
 326  */
 327 static int coda_querycap(struct file *file, void *priv,
 328                          struct v4l2_capability *cap)
 329 {
 330         struct coda_ctx *ctx = fh_to_ctx(priv);
 331
 332         strlcpy(cap->driver, CODA_NAME, sizeof(cap->driver));
 333         strlcpy(cap->card, coda_product_name(ctx->dev->devtype->product),
 334                 sizeof(cap->card));
 335         strlcpy(cap->bus_info, "platform:" CODA_NAME, sizeof(cap->bus_info));
 336         cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
 337         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 338
 339         return 0;
 340 }
 341
 342 static int coda_enum_fmt(struct file *file, void *priv,
 343                          struct v4l2_fmtdesc *f)
 344 {
 345         struct video_device *vdev = video_devdata(file);
 346         const struct coda_video_device *cvd = to_coda_video_device(vdev);
 347         const u32 *formats;
 348
 349         if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 350                 formats = cvd->src_formats;
 351         else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 352                 formats = cvd->dst_formats;
 353         else
 354                 return -EINVAL;
 355
 356         if (f->index >= CODA_MAX_FORMATS || formats[f->index] == 0)
 357                 return -EINVAL;
 358
 359         f->pixelformat = formats[f->index];
 360
 361         return 0;
 362 }
 363
 364 static int coda_g_fmt(struct file *file, void *priv,
 365                       struct v4l2_format *f)
 366 {
 367         struct coda_q_data *q_data;
 368         struct coda_ctx *ctx = fh_to_ctx(priv);
 369
 370         q_data = get_q_data(ctx, f->type);
 371         if (!q_data)
 372                 return -EINVAL;
 373
 374         f->fmt.pix.field        = V4L2_FIELD_NONE;
 375         f->fmt.pix.pixelformat  = q_data->fourcc;
 376         f->fmt.pix.width        = q_data->width;
 377         f->fmt.pix.height       = q_data->height;
 378         f->fmt.pix.bytesperline = q_data->bytesperline;
 379
 380         f->fmt.pix.sizeimage    = q_data->sizeimage;
 381         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
 382                 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 383         else
 384                 f->fmt.pix.colorspace = ctx->colorspace;
 385
 386         return 0;
 387 }
 388
 389 static int coda_try_pixelformat(struct coda_ctx *ctx, struct v4l2_format *f)
 390 {
 391         struct coda_q_data *q_data;
 392         const u32 *formats;
 393         int i;
 394
 395         if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 396                 formats = ctx->cvd->src_formats;
 397         else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 398                 formats = ctx->cvd->dst_formats;
 399         else
 400                 return -EINVAL;
 401
 402         for (i = 0; i < CODA_MAX_FORMATS; i++) {
 403                 if (formats[i] == f->fmt.pix.pixelformat) {
 404                         f->fmt.pix.pixelformat = formats[i];
 405                         return 0;
 406                 }
 407         }
 408
 409         /* Fall back to currently set pixelformat */
 410         q_data = get_q_data(ctx, f->type);
 411         f->fmt.pix.pixelformat = q_data->fourcc;
 412
 413         return 0;
 414 }
 415
 416 static unsigned int coda_estimate_sizeimage(struct coda_ctx *ctx, u32 sizeimage,
 417                                             u32 width, u32 height)
 418 {
 419         /*
 420          * This is a rough estimate for sensible compressed buffer
 421          * sizes (between 1 and 16 bits per pixel). This could be
 422          * improved by better format specific worst case estimates.
 423          */
 424         return round_up(clamp(sizeimage, width * height / 8,
 425                                          width * height * 2), PAGE_SIZE);
 426 }
 427
 428 static int coda_try_fmt(struct coda_ctx *ctx, const struct coda_codec *codec,
 429                         struct v4l2_format *f)
 430 {
 431         struct coda_dev *dev = ctx->dev;
 432         unsigned int max_w, max_h;
 433         enum v4l2_field field;
 434
 435         field = f->fmt.pix.field;
 436         if (field == V4L2_FIELD_ANY)
 437                 field = V4L2_FIELD_NONE;
 438         else if (V4L2_FIELD_NONE != field)
 439                 return -EINVAL;
 440
 441         /* V4L2 specification suggests the driver corrects the format struct
 442          * if any of the dimensions is unsupported */
 443         f->fmt.pix.field = field;
 444
 445         coda_get_max_dimensions(dev, codec, &max_w, &max_h);
 446         v4l_bound_align_image(&f->fmt.pix.width, MIN_W, max_w, W_ALIGN,
 447                               &f->fmt.pix.height, MIN_H, max_h, H_ALIGN,
 448                               S_ALIGN);
 449
 450         switch (f->fmt.pix.pixelformat) {
 451         case V4L2_PIX_FMT_NV12:
 452         case V4L2_PIX_FMT_YUV420:
 453         case V4L2_PIX_FMT_YVU420:
 454                 /*
 455                  * Frame stride must be at least multiple of 8,
 456                  * but multiple of 16 for h.264 or JPEG 4:2:x
 457                  */
 458                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 459                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 460                                         f->fmt.pix.height * 3 / 2;
 461                 break;
 462         case V4L2_PIX_FMT_YUV422P:
 463                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 464                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 465                                         f->fmt.pix.height * 2;
 466                 break;
 467         case V4L2_PIX_FMT_JPEG:
 468                 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 469                 /* fallthrough */
 470         case V4L2_PIX_FMT_H264:
 471         case V4L2_PIX_FMT_MPEG4:
 472                 f->fmt.pix.bytesperline = 0;
 473                 f->fmt.pix.sizeimage = coda_estimate_sizeimage(ctx,
 474                                                         f->fmt.pix.sizeimage,
 475                                                         f->fmt.pix.width,
 476                                                         f->fmt.pix.height);
 477                 break;
 478         default:
 479                 BUG();
 480         }
 481
 482         return 0;
 483 }
 484
 485 static int coda_try_fmt_vid_cap(struct file *file, void *priv,
 486                                 struct v4l2_format *f)
 487 {
 488         struct coda_ctx *ctx = fh_to_ctx(priv);
 489         const struct coda_q_data *q_data_src;
 490         const struct coda_codec *codec;
 491         struct vb2_queue *src_vq;
 492         int ret;
 493
 494         ret = coda_try_pixelformat(ctx, f);
 495         if (ret < 0)
 496                 return ret;
 497
 498         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 499
 500         /*
 501          * If the source format is already fixed, only allow the same output
 502          * resolution
 503          */
 504         src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 505         if (vb2_is_streaming(src_vq)) {
 506                 f->fmt.pix.width = q_data_src->width;
 507                 f->fmt.pix.height = q_data_src->height;
 508         }
 509
 510         f->fmt.pix.colorspace = ctx->colorspace;
 511
 512         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 513         codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
 514                                 f->fmt.pix.pixelformat);
 515         if (!codec)
 516                 return -EINVAL;
 517
 518         ret = coda_try_fmt(ctx, codec, f);
 519         if (ret < 0)
 520                 return ret;
 521
 522         /* The h.264 decoder only returns complete 16x16 macroblocks */
 523         if (codec && codec->src_fourcc == V4L2_PIX_FMT_H264) {
 524                 f->fmt.pix.width = f->fmt.pix.width;
 525                 f->fmt.pix.height = round_up(f->fmt.pix.height, 16);
 526                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 527                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 528                                        f->fmt.pix.height * 3 / 2;
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int coda_try_fmt_vid_out(struct file *file, void *priv,
 535                                 struct v4l2_format *f)
 536 {
 537         struct coda_ctx *ctx = fh_to_ctx(priv);
 538         struct coda_dev *dev = ctx->dev;
 539         const struct coda_q_data *q_data_dst;
 540         const struct coda_codec *codec;
 541         int ret;
 542
 543         ret = coda_try_pixelformat(ctx, f);
 544         if (ret < 0)
 545                 return ret;
 546
 547         switch (f->fmt.pix.colorspace) {
 548         case V4L2_COLORSPACE_REC709:
 549         case V4L2_COLORSPACE_JPEG:
 550                 break;
 551         default:
 552                 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
 553                         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 554                 else
 555                         f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
 556         }
 557
 558         q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
 559         codec = coda_find_codec(dev, f->fmt.pix.pixelformat, q_data_dst->fourcc);
 560
 561         return coda_try_fmt(ctx, codec, f);
 562 }
 563
 564 static int coda_s_fmt(struct coda_ctx *ctx, struct v4l2_format *f)
 565 {
 566         struct coda_q_data *q_data;
 567         struct vb2_queue *vq;
 568
 569         vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 570         if (!vq)
 571                 return -EINVAL;
 572
 573         q_data = get_q_data(ctx, f->type);
 574         if (!q_data)
 575                 return -EINVAL;
 576
 577         if (vb2_is_busy(vq)) {
 578                 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
 579                 return -EBUSY;
 580         }
 581
 582         q_data->fourcc = f->fmt.pix.pixelformat;
 583         q_data->width = f->fmt.pix.width;
 584         q_data->height = f->fmt.pix.height;
 585         q_data->bytesperline = f->fmt.pix.bytesperline;
 586         q_data->sizeimage = f->fmt.pix.sizeimage;
 587         q_data->rect.left = 0;
 588         q_data->rect.top = 0;
 589         q_data->rect.width = f->fmt.pix.width;
 590         q_data->rect.height = f->fmt.pix.height;
 591
 592         switch (f->fmt.pix.pixelformat) {
 593         case V4L2_PIX_FMT_NV12:
 594                 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 595                         ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
 596                         if (!disable_tiling)
 597                                 break;
 598                 }
 599                 /* else fall through */
 600         case V4L2_PIX_FMT_YUV420:
 601         case V4L2_PIX_FMT_YVU420:
 602                 ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
 603                 break;
 604         default:
 605                 break;
 606         }
 607
 608         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
 609                 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
 610                 f->type, q_data->width, q_data->height, q_data->fourcc);
 611
 612         return 0;
 613 }
 614
 615 static int coda_s_fmt_vid_cap(struct file *file, void *priv,
 616                               struct v4l2_format *f)
 617 {
 618         struct coda_ctx *ctx = fh_to_ctx(priv);
 619         int ret;
 620
 621         ret = coda_try_fmt_vid_cap(file, priv, f);
 622         if (ret)
 623                 return ret;
 624
 625         return coda_s_fmt(ctx, f);
 626 }
 627
 628 static int coda_s_fmt_vid_out(struct file *file, void *priv,
 629                               struct v4l2_format *f)
 630 {
 631         struct coda_ctx *ctx = fh_to_ctx(priv);
 632         struct v4l2_format f_cap;
 633         int ret;
 634
 635         ret = coda_try_fmt_vid_out(file, priv, f);
 636         if (ret)
 637                 return ret;
 638
 639         ret = coda_s_fmt(ctx, f);
 640         if (ret)
 641                 return ret;
 642
 643         ctx->colorspace = f->fmt.pix.colorspace;
 644
 645         memset(&f_cap, 0, sizeof(f_cap));
 646         f_cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 647         coda_g_fmt(file, priv, &f_cap);
 648         f_cap.fmt.pix.width = f->fmt.pix.width;
 649         f_cap.fmt.pix.height = f->fmt.pix.height;
 650
 651         ret = coda_try_fmt_vid_cap(file, priv, &f_cap);
 652         if (ret)
 653                 return ret;
 654
 655         return coda_s_fmt(ctx, &f_cap);
 656 }
 657
 658 static int coda_reqbufs(struct file *file, void *priv,
 659                         struct v4l2_requestbuffers *rb)
 660 {
 661         struct coda_ctx *ctx = fh_to_ctx(priv);
 662         int ret;
 663
 664         ret = v4l2_m2m_reqbufs(file, ctx->fh.m2m_ctx, rb);
 665         if (ret)
 666                 return ret;
 667
 668         /*
 669          * Allow to allocate instance specific per-context buffers, such as
 670          * bitstream ringbuffer, slice buffer, work buffer, etc. if needed.
 671          */
 672         if (rb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT && ctx->ops->reqbufs)
 673                 return ctx->ops->reqbufs(ctx, rb);
 674
 675         return 0;
 676 }
 677
 678 static int coda_qbuf(struct file *file, void *priv,
 679                      struct v4l2_buffer *buf)
 680 {
 681         struct coda_ctx *ctx = fh_to_ctx(priv);
 682
 683         return v4l2_m2m_qbuf(file, ctx->fh.m2m_ctx, buf);
 684 }
 685
 686 static bool coda_buf_is_end_of_stream(struct coda_ctx *ctx,
 687                                       struct vb2_v4l2_buffer *buf)
 688 {
 689         struct vb2_queue *src_vq;
 690
 691         src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 692
 693         return ((ctx->bit_stream_param & CODA_BIT_STREAM_END_FLAG) &&
 694                 (buf->sequence == (ctx->qsequence - 1)));
 695 }
 696
 697 void coda_m2m_buf_done(struct coda_ctx *ctx, struct vb2_v4l2_buffer *buf,
 698                        enum vb2_buffer_state state)
 699 {
 700         const struct v4l2_event eos_event = {
 701                 .type = V4L2_EVENT_EOS
 702         };
 703
 704         if (coda_buf_is_end_of_stream(ctx, buf)) {
 705                 buf->flags |= V4L2_BUF_FLAG_LAST;
 706
 707                 v4l2_event_queue_fh(&ctx->fh, &eos_event);
 708         }
 709
 710         v4l2_m2m_buf_done(buf, state);
 711 }
 712
 713 static int coda_g_selection(struct file *file, void *fh,
 714                             struct v4l2_selection *s)
 715 {
 716         struct coda_ctx *ctx = fh_to_ctx(fh);
 717         struct coda_q_data *q_data;
 718         struct v4l2_rect r, *rsel;
 719
 720         q_data = get_q_data(ctx, s->type);
 721         if (!q_data)
 722                 return -EINVAL;
 723
 724         r.left = 0;
 725         r.top = 0;
 726         r.width = q_data->width;
 727         r.height = q_data->height;
 728         rsel = &q_data->rect;
 729
 730         switch (s->target) {
 731         case V4L2_SEL_TGT_CROP_DEFAULT:
 732         case V4L2_SEL_TGT_CROP_BOUNDS:
 733                 rsel = &r;
 734                 /* fallthrough */
 735         case V4L2_SEL_TGT_CROP:
 736                 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 737                         return -EINVAL;
 738                 break;
 739         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 740         case V4L2_SEL_TGT_COMPOSE_PADDED:
 741                 rsel = &r;
 742                 /* fallthrough */
 743         case V4L2_SEL_TGT_COMPOSE:
 744         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 745                 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 746                         return -EINVAL;
 747                 break;
 748         default:
 749                 return -EINVAL;
 750         }
 751
 752         s->r = *rsel;
 753
 754         return 0;
 755 }
 756
 757 static int coda_try_decoder_cmd(struct file *file, void *fh,
 758                                 struct v4l2_decoder_cmd *dc)
 759 {
 760         if (dc->cmd != V4L2_DEC_CMD_STOP)
 761                 return -EINVAL;
 762
 763         if (dc->flags & V4L2_DEC_CMD_STOP_TO_BLACK)
 764                 return -EINVAL;
 765
 766         if (!(dc->flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) && (dc->stop.pts != 0))
 767                 return -EINVAL;
 768
 769         return 0;
 770 }
 771
 772 static int coda_decoder_cmd(struct file *file, void *fh,
 773                             struct v4l2_decoder_cmd *dc)
 774 {
 775         struct coda_ctx *ctx = fh_to_ctx(fh);
 776         int ret;
 777
 778         ret = coda_try_decoder_cmd(file, fh, dc);
 779         if (ret < 0)
 780                 return ret;
 781
 782         /* Ignore decoder stop command silently in encoder context */
 783         if (ctx->inst_type != CODA_INST_DECODER)
 784                 return 0;
 785
 786         /* Set the stream-end flag on this context */
 787         coda_bit_stream_end_flag(ctx);
 788         ctx->hold = false;
 789         v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
 790
 791         return 0;
 792 }
 793
 794 static int coda_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 795 {
 796         struct coda_ctx *ctx = fh_to_ctx(fh);
 797         struct v4l2_fract *tpf;
 798
 799         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 800                 return -EINVAL;
 801
 802         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 803         tpf = &a->parm.output.timeperframe;
 804         tpf->denominator = ctx->params.framerate & CODA_FRATE_RES_MASK;
 805         tpf->numerator = 1 + (ctx->params.framerate >>
 806                               CODA_FRATE_DIV_OFFSET);
 807
 808         return 0;
 809 }
 810
 811 /*
 812  * Approximate timeperframe v4l2_fract with values that can be written
 813  * into the 16-bit CODA_FRATE_DIV and CODA_FRATE_RES fields.
 814  */
 815 static void coda_approximate_timeperframe(struct v4l2_fract *timeperframe)
 816 {
 817         struct v4l2_fract s = *timeperframe;
 818         struct v4l2_fract f0;
 819         struct v4l2_fract f1 = { 1, 0 };
 820         struct v4l2_fract f2 = { 0, 1 };
 821         unsigned int i, div, s_denominator;
 822
 823         /* Lower bound is 1/65535 */
 824         if (s.numerator == 0 || s.denominator / s.numerator > 65535) {
 825                 timeperframe->numerator = 1;
 826                 timeperframe->denominator = 65535;
 827                 return;
 828         }
 829
 830         /* Upper bound is 65536/1, map everything above to infinity */
 831         if (s.denominator == 0 || s.numerator / s.denominator > 65536) {
 832                 timeperframe->numerator = 1;
 833                 timeperframe->denominator = 0;
 834                 return;
 835         }
 836
 837         /* Reduce fraction to lowest terms */
 838         div = gcd(s.numerator, s.denominator);
 839         if (div > 1) {
 840                 s.numerator /= div;
 841                 s.denominator /= div;
 842         }
 843
 844         if (s.numerator <= 65536 && s.denominator < 65536) {
 845                 *timeperframe = s;
 846                 return;
 847         }
 848
 849         /* Find successive convergents from continued fraction expansion */
 850         while (f2.numerator <= 65536 && f2.denominator < 65536) {
 851                 f0 = f1;
 852                 f1 = f2;
 853
 854                 /* Stop when f2 exactly equals timeperframe */
 855                 if (s.numerator == 0)
 856                         break;
 857
 858                 i = s.denominator / s.numerator;
 859
 860                 f2.numerator = f0.numerator + i * f1.numerator;
 861                 f2.denominator = f0.denominator + i * f2.denominator;
 862
 863                 s_denominator = s.numerator;
 864                 s.numerator = s.denominator % s.numerator;
 865                 s.denominator = s_denominator;
 866         }
 867
 868         *timeperframe = f1;
 869 }
 870
 871 static uint32_t coda_timeperframe_to_frate(struct v4l2_fract *timeperframe)
 872 {
 873         return ((timeperframe->numerator - 1) << CODA_FRATE_DIV_OFFSET) |
 874                 timeperframe->denominator;
 875 }
 876
 877 static int coda_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 878 {
 879         struct coda_ctx *ctx = fh_to_ctx(fh);
 880         struct v4l2_fract *tpf;
 881
 882         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 883                 return -EINVAL;
 884
 885         tpf = &a->parm.output.timeperframe;
 886         coda_approximate_timeperframe(tpf);
 887         ctx->params.framerate = coda_timeperframe_to_frate(tpf);
 888
 889         return 0;
 890 }
 891
 892 static int coda_subscribe_event(struct v4l2_fh *fh,
 893                                 const struct v4l2_event_subscription *sub)
 894 {
 895         switch (sub->type) {
 896         case V4L2_EVENT_EOS:
 897                 return v4l2_event_subscribe(fh, sub, 0, NULL);
 898         default:
 899                 return v4l2_ctrl_subscribe_event(fh, sub);
 900         }
 901 }
 902
 903 static const struct v4l2_ioctl_ops coda_ioctl_ops = {
 904         .vidioc_querycap        = coda_querycap,
 905
 906         .vidioc_enum_fmt_vid_cap = coda_enum_fmt,
 907         .vidioc_g_fmt_vid_cap   = coda_g_fmt,
 908         .vidioc_try_fmt_vid_cap = coda_try_fmt_vid_cap,
 909         .vidioc_s_fmt_vid_cap   = coda_s_fmt_vid_cap,
 910
 911         .vidioc_enum_fmt_vid_out = coda_enum_fmt,
 912         .vidioc_g_fmt_vid_out   = coda_g_fmt,
 913         .vidioc_try_fmt_vid_out = coda_try_fmt_vid_out,
 914         .vidioc_s_fmt_vid_out   = coda_s_fmt_vid_out,
 915
 916         .vidioc_reqbufs         = coda_reqbufs,
 917         .vidioc_querybuf        = v4l2_m2m_ioctl_querybuf,
 918
 919         .vidioc_qbuf            = coda_qbuf,
 920         .vidioc_expbuf          = v4l2_m2m_ioctl_expbuf,
 921         .vidioc_dqbuf           = v4l2_m2m_ioctl_dqbuf,
 922         .vidioc_create_bufs     = v4l2_m2m_ioctl_create_bufs,
 923
 924         .vidioc_streamon        = v4l2_m2m_ioctl_streamon,
 925         .vidioc_streamoff       = v4l2_m2m_ioctl_streamoff,
 926
 927         .vidioc_g_selection     = coda_g_selection,
 928
 929         .vidioc_try_decoder_cmd = coda_try_decoder_cmd,
 930         .vidioc_decoder_cmd     = coda_decoder_cmd,
 931
 932         .vidioc_g_parm          = coda_g_parm,
 933         .vidioc_s_parm          = coda_s_parm,
 934
 935         .vidioc_subscribe_event = coda_subscribe_event,
 936         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 937 };
 938
 939 /*
 940  * Mem-to-mem operations.
 941  */
 942
 943 static void coda_device_run(void *m2m_priv)
 944 {
 945         struct coda_ctx *ctx = m2m_priv;
 946         struct coda_dev *dev = ctx->dev;
 947
 948         queue_work(dev->workqueue, &ctx->pic_run_work);
 949 }
 950
 951 static void coda_pic_run_work(struct work_struct *work)
 952 {
 953         struct coda_ctx *ctx = container_of(work, struct coda_ctx, pic_run_work);
 954         struct coda_dev *dev = ctx->dev;
 955         int ret;
 956
 957         mutex_lock(&ctx->buffer_mutex);
 958         mutex_lock(&dev->coda_mutex);
 959
 960         ret = ctx->ops->prepare_run(ctx);
 961         if (ret < 0 && ctx->inst_type == CODA_INST_DECODER) {
 962                 mutex_unlock(&dev->coda_mutex);
 963                 mutex_unlock(&ctx->buffer_mutex);
 964                 /* job_finish scheduled by prepare_decode */
 965                 return;
 966         }
 967
 968         if (!wait_for_completion_timeout(&ctx->completion,
 969                                          msecs_to_jiffies(1000))) {
 970                 dev_err(&dev->plat_dev->dev, "CODA PIC_RUN timeout\n");
 971
 972                 ctx->hold = true;
 973
 974                 coda_hw_reset(ctx);
 975         } else if (!ctx->aborting) {
 976                 ctx->ops->finish_run(ctx);
 977         }
 978
 979         if ((ctx->aborting || (!ctx->streamon_cap && !ctx->streamon_out)) &&
 980             ctx->ops->seq_end_work)
 981                 queue_work(dev->workqueue, &ctx->seq_end_work);
 982
 983         mutex_unlock(&dev->coda_mutex);
 984         mutex_unlock(&ctx->buffer_mutex);
 985
 986         v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 987 }
 988
 989 static int coda_job_ready(void *m2m_priv)
 990 {
 991         struct coda_ctx *ctx = m2m_priv;
 992         int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);
 993
 994         /*
 995          * For both 'P' and 'key' frame cases 1 picture
 996          * and 1 frame are needed. In the decoder case,
 997          * the compressed frame can be in the bitstream.
 998          */
 999         if (!src_bufs && ctx->inst_type != CODA_INST_DECODER) {
1000                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1001                          "not ready: not enough video buffers.\n");
1002                 return 0;
1003         }
1004
1005         if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
1006                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1007                          "not ready: not enough video capture buffers.\n");
1008                 return 0;
1009         }
1010
1011         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
1012                 bool stream_end = ctx->bit_stream_param &
1013                                   CODA_BIT_STREAM_END_FLAG;
1014                 int num_metas = ctx->num_metas;
1015
1016                 if (ctx->hold && !src_bufs) {
1017                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1018                                  "%d: not ready: on hold for more buffers.\n",
1019                                  ctx->idx);
1020                         return 0;
1021                 }
1022
1023                 if (!stream_end && (num_metas + src_bufs) < 2) {
1024                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1025                                  "%d: not ready: need 2 buffers available (%d, %d)\n",
1026                                  ctx->idx, num_metas, src_bufs);
1027                         return 0;
1028                 }
1029
1030
1031                 if (!src_bufs && !stream_end &&
1032                     (coda_get_bitstream_payload(ctx) < 512)) {
1033                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1034                                  "%d: not ready: not enough bitstream data (%d).\n",
1035                                  ctx->idx, coda_get_bitstream_payload(ctx));
1036                         return 0;
1037                 }
1038         }
1039
1040         if (ctx->aborting) {
1041                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1042                          "not ready: aborting\n");
1043                 return 0;
1044         }
1045
1046         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1047                         "job ready\n");
1048
1049         return 1;
1050 }
1051
1052 static void coda_job_abort(void *priv)
1053 {
1054         struct coda_ctx *ctx = priv;
1055
1056         ctx->aborting = 1;
1057
1058         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1059                  "Aborting task\n");
1060 }
1061
1062 static void coda_lock(void *m2m_priv)
1063 {
1064         struct coda_ctx *ctx = m2m_priv;
1065         struct coda_dev *pcdev = ctx->dev;
1066
1067         mutex_lock(&pcdev->dev_mutex);
1068 }
1069
1070 static void coda_unlock(void *m2m_priv)
1071 {
1072         struct coda_ctx *ctx = m2m_priv;
1073         struct coda_dev *pcdev = ctx->dev;
1074
1075         mutex_unlock(&pcdev->dev_mutex);
1076 }
1077
1078 static const struct v4l2_m2m_ops coda_m2m_ops = {
1079         .device_run     = coda_device_run,
1080         .job_ready      = coda_job_ready,
1081         .job_abort      = coda_job_abort,
1082         .lock           = coda_lock,
1083         .unlock         = coda_unlock,
1084 };
1085
1086 static void set_default_params(struct coda_ctx *ctx)
1087 {
1088         unsigned int max_w, max_h, usize, csize;
1089
1090         ctx->codec = coda_find_codec(ctx->dev, ctx->cvd->src_formats[0],
1091                                      ctx->cvd->dst_formats[0]);
1092         max_w = min(ctx->codec->max_w, 1920U);
1093         max_h = min(ctx->codec->max_h, 1088U);
1094         usize = max_w * max_h * 3 / 2;
1095         csize = coda_estimate_sizeimage(ctx, usize, max_w, max_h);
1096
1097         ctx->params.codec_mode = ctx->codec->mode;
1098         ctx->colorspace = V4L2_COLORSPACE_REC709;
1099         ctx->params.framerate = 30;
1100
1101         /* Default formats for output and input queues */
1102         ctx->q_data[V4L2_M2M_SRC].fourcc = ctx->cvd->src_formats[0];
1103         ctx->q_data[V4L2_M2M_DST].fourcc = ctx->cvd->dst_formats[0];
1104         ctx->q_data[V4L2_M2M_SRC].width = max_w;
1105         ctx->q_data[V4L2_M2M_SRC].height = max_h;
1106         ctx->q_data[V4L2_M2M_DST].width = max_w;
1107         ctx->q_data[V4L2_M2M_DST].height = max_h;
1108         if (ctx->codec->src_fourcc == V4L2_PIX_FMT_YUV420) {
1109                 ctx->q_data[V4L2_M2M_SRC].bytesperline = max_w;
1110                 ctx->q_data[V4L2_M2M_SRC].sizeimage = usize;
1111                 ctx->q_data[V4L2_M2M_DST].bytesperline = 0;
1112                 ctx->q_data[V4L2_M2M_DST].sizeimage = csize;
1113         } else {
1114                 ctx->q_data[V4L2_M2M_SRC].bytesperline = 0;
1115                 ctx->q_data[V4L2_M2M_SRC].sizeimage = csize;
1116                 ctx->q_data[V4L2_M2M_DST].bytesperline = max_w;
1117                 ctx->q_data[V4L2_M2M_DST].sizeimage = usize;
1118         }
1119         ctx->q_data[V4L2_M2M_SRC].rect.width = max_w;
1120         ctx->q_data[V4L2_M2M_SRC].rect.height = max_h;
1121         ctx->q_data[V4L2_M2M_DST].rect.width = max_w;
1122         ctx->q_data[V4L2_M2M_DST].rect.height = max_h;
1123
1124         /*
1125          * Since the RBC2AXI logic only supports a single chroma plane,
1126          * macroblock tiling only works for to NV12 pixel format.
1127          */
1128         ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
1129 }
1130
1131 /*
1132  * Queue operations
1133  */
1134 static int coda_queue_setup(struct vb2_queue *vq, const void *parg,
1135                                 unsigned int *nbuffers, unsigned int *nplanes,
1136                                 unsigned int sizes[], void *alloc_ctxs[])
1137 {
1138         struct coda_ctx *ctx = vb2_get_drv_priv(vq);
1139         struct coda_q_data *q_data;
1140         unsigned int size;
1141
1142         q_data = get_q_data(ctx, vq->type);
1143         size = q_data->sizeimage;
1144
1145         *nplanes = 1;
1146         sizes[0] = size;
1147
1148         /* Set to vb2-dma-contig allocator context, ignored by vb2-vmalloc */
1149         alloc_ctxs[0] = ctx->dev->alloc_ctx;
1150
1151         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1152                  "get %d buffer(s) of size %d each.\n", *nbuffers, size);
1153
1154         return 0;
1155 }
1156
1157 static int coda_buf_prepare(struct vb2_buffer *vb)
1158 {
1159         struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1160         struct coda_q_data *q_data;
1161
1162         q_data = get_q_data(ctx, vb->vb2_queue->type);
1163
1164         if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
1165                 v4l2_warn(&ctx->dev->v4l2_dev,
1166                           "%s data will not fit into plane (%lu < %lu)\n",
1167                           __func__, vb2_plane_size(vb, 0),
1168                           (long)q_data->sizeimage);
1169                 return -EINVAL;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static void coda_buf_queue(struct vb2_buffer *vb)
1176 {
1177         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1178         struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1179         struct vb2_queue *vq = vb->vb2_queue;
1180         struct coda_q_data *q_data;
1181
1182         q_data = get_q_data(ctx, vb->vb2_queue->type);
1183
1184         /*
1185          * In the decoder case, immediately try to copy the buffer into the
1186          * bitstream ringbuffer and mark it as ready to be dequeued.
1187          */
1188         if (ctx->bitstream.size && vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1189                 /*
1190                  * For backwards compatibility, queuing an empty buffer marks
1191                  * the stream end
1192                  */
1193                 if (vb2_get_plane_payload(vb, 0) == 0)
1194                         coda_bit_stream_end_flag(ctx);
1195                 mutex_lock(&ctx->bitstream_mutex);
1196                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1197                 if (vb2_is_streaming(vb->vb2_queue))
1198                         coda_fill_bitstream(ctx, true);
1199                 mutex_unlock(&ctx->bitstream_mutex);
1200         } else {
1201                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1202         }
1203 }
1204
1205 int coda_alloc_aux_buf(struct coda_dev *dev, struct coda_aux_buf *buf,
1206                        size_t size, const char *name, struct dentry *parent)
1207 {
1208         buf->vaddr = dma_alloc_coherent(&dev->plat_dev->dev, size, &buf->paddr,
1209                                         GFP_KERNEL);
1210         if (!buf->vaddr) {
1211                 v4l2_err(&dev->v4l2_dev,
1212                          "Failed to allocate %s buffer of size %u\n",
1213                          name, size);
1214                 return -ENOMEM;
1215         }
1216
1217         buf->size = size;
1218
1219         if (name && parent) {
1220                 buf->blob.data = buf->vaddr;
1221                 buf->blob.size = size;
1222                 buf->dentry = debugfs_create_blob(name, 0644, parent,
1223                                                   &buf->blob);
1224                 if (!buf->dentry)
1225                         dev_warn(&dev->plat_dev->dev,
1226                                  "failed to create debugfs entry %s\n", name);
1227         }
1228
1229         return 0;
1230 }
1231
1232 void coda_free_aux_buf(struct coda_dev *dev,
1233                        struct coda_aux_buf *buf)
1234 {
1235         if (buf->vaddr) {
1236                 dma_free_coherent(&dev->plat_dev->dev, buf->size,
1237                                   buf->vaddr, buf->paddr);
1238                 buf->vaddr = NULL;
1239                 buf->size = 0;
1240                 debugfs_remove(buf->dentry);
1241                 buf->dentry = NULL;
1242         }
1243 }
1244
1245 static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
1246 {
1247         struct coda_ctx *ctx = vb2_get_drv_priv(q);
1248         struct v4l2_device *v4l2_dev = &ctx->dev->v4l2_dev;
1249         struct coda_q_data *q_data_src, *q_data_dst;
1250         struct vb2_v4l2_buffer *buf;
1251         int ret = 0;
1252
1253         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
1254         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1255                 if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
1256                         /* copy the buffers that were queued before streamon */
1257                         mutex_lock(&ctx->bitstream_mutex);
1258                         coda_fill_bitstream(ctx, false);
1259                         mutex_unlock(&ctx->bitstream_mutex);
1260
1261                         if (coda_get_bitstream_payload(ctx) < 512) {
1262                                 ret = -EINVAL;
1263                                 goto err;
1264                         }
1265                 } else {
1266                         if (count < 1) {
1267                                 ret = -EINVAL;
1268                                 goto err;
1269                         }
1270                 }
1271
1272                 ctx->streamon_out = 1;
1273         } else {
1274                 if (count < 1) {
1275                         ret = -EINVAL;
1276                         goto err;
1277                 }
1278
1279                 ctx->streamon_cap = 1;
1280         }
1281
1282         /* Don't start the coda unless both queues are on */
1283         if (!(ctx->streamon_out & ctx->streamon_cap))
1284                 return 0;
1285
1286         q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1287         if ((q_data_src->width != q_data_dst->width &&
1288              round_up(q_data_src->width, 16) != q_data_dst->width) ||
1289             (q_data_src->height != q_data_dst->height &&
1290              round_up(q_data_src->height, 16) != q_data_dst->height)) {
1291                 v4l2_err(v4l2_dev, "can't convert %dx%d to %dx%d\n",
1292                          q_data_src->width, q_data_src->height,
1293                          q_data_dst->width, q_data_dst->height);
1294                 ret = -EINVAL;
1295                 goto err;
1296         }
1297
1298         /* Allow BIT decoder device_run with no new buffers queued */
1299         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
1300                 v4l2_m2m_set_src_buffered(ctx->fh.m2m_ctx, true);
1301
1302         ctx->gopcounter = ctx->params.gop_size - 1;
1303
1304         ctx->codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
1305                                      q_data_dst->fourcc);
1306         if (!ctx->codec) {
1307                 v4l2_err(v4l2_dev, "couldn't tell instance type.\n");
1308                 ret = -EINVAL;
1309                 goto err;
1310         }
1311
1312         if (q_data_dst->fourcc == V4L2_PIX_FMT_JPEG)
1313                 ctx->params.gop_size = 1;
1314         ctx->gopcounter = ctx->params.gop_size - 1;
1315
1316         ret = ctx->ops->start_streaming(ctx);
1317         if (ctx->inst_type == CODA_INST_DECODER) {
1318                 if (ret == -EAGAIN)
1319                         return 0;
1320                 else if (ret < 0)
1321                         goto err;
1322         }
1323
1324         return ret;
1325
1326 err:
1327         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1328                 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1329                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
1330         } else {
1331                 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1332                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
1333         }
1334         return ret;
1335 }
1336
1337 static void coda_stop_streaming(struct vb2_queue *q)
1338 {
1339         struct coda_ctx *ctx = vb2_get_drv_priv(q);
1340         struct coda_dev *dev = ctx->dev;
1341         struct vb2_v4l2_buffer *buf;
1342         unsigned long flags;
1343         bool stop;
1344
1345         stop = ctx->streamon_out && ctx->streamon_cap;
1346
1347         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1348                 v4l2_dbg(1, coda_debug, &dev->v4l2_dev,
1349                          "%s: output\n", __func__);
1350                 ctx->streamon_out = 0;
1351
1352                 coda_bit_stream_end_flag(ctx);
1353
1354                 ctx->qsequence = 0;
1355
1356                 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1357                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
1358         } else {
1359                 v4l2_dbg(1, coda_debug, &dev->v4l2_dev,
1360                          "%s: capture\n", __func__);
1361                 ctx->streamon_cap = 0;
1362
1363                 ctx->osequence = 0;
1364                 ctx->sequence_offset = 0;
1365
1366                 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1367                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
1368         }
1369
1370         if (stop) {
1371                 struct coda_buffer_meta *meta;
1372
1373                 if (ctx->ops->seq_end_work) {
1374                         queue_work(dev->workqueue, &ctx->seq_end_work);
1375                         flush_work(&ctx->seq_end_work);
1376                 }
1377                 spin_lock_irqsave(&ctx->buffer_meta_lock, flags);
1378                 while (!list_empty(&ctx->buffer_meta_list)) {
1379                         meta = list_first_entry(&ctx->buffer_meta_list,
1380                                                 struct coda_buffer_meta, list);
1381                         list_del(&meta->list);
1382                         kfree(meta);
1383                 }
1384                 ctx->num_metas = 0;
1385                 spin_unlock_irqrestore(&ctx->buffer_meta_lock, flags);
1386                 kfifo_init(&ctx->bitstream_fifo,
1387                         ctx->bitstream.vaddr, ctx->bitstream.size);
1388                 ctx->runcounter = 0;
1389                 ctx->aborting = 0;
1390         }
1391
1392         if (!ctx->streamon_out && !ctx->streamon_cap)
1393                 ctx->bit_stream_param &= ~CODA_BIT_STREAM_END_FLAG;
1394 }
1395
1396 static const struct vb2_ops coda_qops = {
1397         .queue_setup            = coda_queue_setup,
1398         .buf_prepare            = coda_buf_prepare,
1399         .buf_queue              = coda_buf_queue,
1400         .start_streaming        = coda_start_streaming,
1401         .stop_streaming         = coda_stop_streaming,
1402         .wait_prepare           = vb2_ops_wait_prepare,
1403         .wait_finish            = vb2_ops_wait_finish,
1404 };
1405
1406 static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
1407 {
1408         struct coda_ctx *ctx =
1409                         container_of(ctrl->handler, struct coda_ctx, ctrls);
1410
1411         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1412                  "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);
1413
1414         switch (ctrl->id) {
1415         case V4L2_CID_HFLIP:
1416                 if (ctrl->val)
1417                         ctx->params.rot_mode |= CODA_MIR_HOR;
1418                 else
1419                         ctx->params.rot_mode &= ~CODA_MIR_HOR;
1420                 break;
1421         case V4L2_CID_VFLIP:
1422                 if (ctrl->val)
1423                         ctx->params.rot_mode |= CODA_MIR_VER;
1424                 else
1425                         ctx->params.rot_mode &= ~CODA_MIR_VER;
1426                 break;
1427         case V4L2_CID_MPEG_VIDEO_BITRATE:
1428                 ctx->params.bitrate = ctrl->val / 1000;
1429                 break;
1430         case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
1431                 ctx->params.gop_size = ctrl->val;
1432                 break;
1433         case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP:
1434                 ctx->params.h264_intra_qp = ctrl->val;
1435                 break;
1436         case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP:
1437                 ctx->params.h264_inter_qp = ctrl->val;
1438                 break;
1439         case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
1440                 ctx->params.h264_min_qp = ctrl->val;
1441                 break;
1442         case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:
1443                 ctx->params.h264_max_qp = ctrl->val;
1444                 break;
1445         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA:
1446                 ctx->params.h264_deblk_alpha = ctrl->val;
1447                 break;
1448         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA:
1449                 ctx->params.h264_deblk_beta = ctrl->val;
1450                 break;
1451         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1452                 ctx->params.h264_deblk_enabled = (ctrl->val ==
1453                                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED);
1454                 break;
1455         case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:
1456                 ctx->params.mpeg4_intra_qp = ctrl->val;
1457                 break;
1458         case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP:
1459                 ctx->params.mpeg4_inter_qp = ctrl->val;
1460                 break;
1461         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1462                 ctx->params.slice_mode = ctrl->val;
1463                 break;
1464         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB:
1465                 ctx->params.slice_max_mb = ctrl->val;
1466                 break;
1467         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES:
1468                 ctx->params.slice_max_bits = ctrl->val * 8;
1469                 break;
1470         case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1471                 break;
1472         case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:
1473                 ctx->params.intra_refresh = ctrl->val;
1474                 break;
1475         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
1476                 coda_set_jpeg_compression_quality(ctx, ctrl->val);
1477                 break;
1478         case V4L2_CID_JPEG_RESTART_INTERVAL:
1479                 ctx->params.jpeg_restart_interval = ctrl->val;
1480                 break;
1481         case V4L2_CID_MPEG_VIDEO_VBV_DELAY:
1482                 ctx->params.vbv_delay = ctrl->val;
1483                 break;
1484         case V4L2_CID_MPEG_VIDEO_VBV_SIZE:
1485                 ctx->params.vbv_size = min(ctrl->val * 8192, 0x7fffffff);
1486                 break;
1487         default:
1488                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1489                         "Invalid control, id=%d, val=%d\n",
1490                         ctrl->id, ctrl->val);
1491                 return -EINVAL;
1492         }
1493
1494         return 0;
1495 }
1496
1497 static const struct v4l2_ctrl_ops coda_ctrl_ops = {
1498         .s_ctrl = coda_s_ctrl,
1499 };
1500
1501 static void coda_encode_ctrls(struct coda_ctx *ctx)
1502 {
1503         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1504                 V4L2_CID_MPEG_VIDEO_BITRATE, 0, 32767000, 1000, 0);
1505         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1506                 V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 60, 1, 16);
1507         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1508                 V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP, 0, 51, 1, 25);
1509         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1510                 V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP, 0, 51, 1, 25);
1511         if (ctx->dev->devtype->product != CODA_960) {
1512                 v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1513                         V4L2_CID_MPEG_VIDEO_H264_MIN_QP, 0, 51, 1, 12);
1514         }
1515         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1516                 V4L2_CID_MPEG_VIDEO_H264_MAX_QP, 0, 51, 1, 51);
1517         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1518                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA, 0, 15, 1, 0);
1519         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1520                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA, 0, 15, 1, 0);
1521         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1522                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE,
1523                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED, 0x0,
1524                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED);
1525         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1526                 V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP, 1, 31, 1, 2);
1527         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1528                 V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP, 1, 31, 1, 2);
1529         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1530                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE,
1531                 V4L2_MPEG_VIDEO_MULTI_SICE_MODE_MAX_BYTES, 0x0,
1532                 V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE);
1533         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1534                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB, 1, 0x3fffffff, 1, 1);
1535         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1536                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES, 1, 0x3fffffff, 1,
1537                 500);
1538         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1539                 V4L2_CID_MPEG_VIDEO_HEADER_MODE,
1540                 V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME,
1541                 (1 << V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE),
1542                 V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME);
1543         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1544                 V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB, 0,
1545                 1920 * 1088 / 256, 1, 0);
1546         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1547                 V4L2_CID_MPEG_VIDEO_VBV_DELAY, 0, 0x7fff, 1, 0);
1548         /*
1549          * The maximum VBV size value is 0x7fffffff bits,
1550          * one bit less than 262144 KiB
1551          */
1552         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1553                 V4L2_CID_MPEG_VIDEO_VBV_SIZE, 0, 262144, 1, 0);
1554 }
1555
1556 static void coda_jpeg_encode_ctrls(struct coda_ctx *ctx)
1557 {
1558         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1559                 V4L2_CID_JPEG_COMPRESSION_QUALITY, 5, 100, 1, 50);
1560         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1561                 V4L2_CID_JPEG_RESTART_INTERVAL, 0, 100, 1, 0);
1562 }
1563
1564 static int coda_ctrls_setup(struct coda_ctx *ctx)
1565 {
1566         v4l2_ctrl_handler_init(&ctx->ctrls, 2);
1567
1568         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1569                 V4L2_CID_HFLIP, 0, 1, 1, 0);
1570         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1571                 V4L2_CID_VFLIP, 0, 1, 1, 0);
1572         if (ctx->inst_type == CODA_INST_ENCODER) {
1573                 if (ctx->cvd->dst_formats[0] == V4L2_PIX_FMT_JPEG)
1574                         coda_jpeg_encode_ctrls(ctx);
1575                 else
1576                         coda_encode_ctrls(ctx);
1577         }
1578
1579         if (ctx->ctrls.error) {
1580                 v4l2_err(&ctx->dev->v4l2_dev,
1581                         "control initialization error (%d)",
1582                         ctx->ctrls.error);
1583                 return -EINVAL;
1584         }
1585
1586         return v4l2_ctrl_handler_setup(&ctx->ctrls);
1587 }
1588
1589 static int coda_queue_init(struct coda_ctx *ctx, struct vb2_queue *vq)
1590 {
1591         vq->drv_priv = ctx;
1592         vq->ops = &coda_qops;
1593         vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1594         vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1595         vq->lock = &ctx->dev->dev_mutex;
1596         /* One way to indicate end-of-stream for coda is to set the
1597          * bytesused == 0. However by default videobuf2 handles bytesused
1598          * equal to 0 as a special case and changes its value to the size
1599          * of the buffer. Set the allow_zero_bytesused flag, so
1600          * that videobuf2 will keep the value of bytesused intact.
1601          */
1602         vq->allow_zero_bytesused = 1;
1603
1604         return vb2_queue_init(vq);
1605 }
1606
1607 int coda_encoder_queue_init(void *priv, struct vb2_queue *src_vq,
1608                             struct vb2_queue *dst_vq)
1609 {
1610         int ret;
1611
1612         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1613         src_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1614         src_vq->mem_ops = &vb2_dma_contig_memops;
1615
1616         ret = coda_queue_init(priv, src_vq);
1617         if (ret)
1618                 return ret;
1619
1620         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1621         dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1622         dst_vq->mem_ops = &vb2_dma_contig_memops;
1623
1624         return coda_queue_init(priv, dst_vq);
1625 }
1626
1627 int coda_decoder_queue_init(void *priv, struct vb2_queue *src_vq,
1628                             struct vb2_queue *dst_vq)
1629 {
1630         int ret;
1631
1632         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1633         src_vq->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR;
1634         src_vq->mem_ops = &vb2_vmalloc_memops;
1635
1636         ret = coda_queue_init(priv, src_vq);
1637         if (ret)
1638                 return ret;
1639
1640         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1641         dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1642         dst_vq->mem_ops = &vb2_dma_contig_memops;
1643
1644         return coda_queue_init(priv, dst_vq);
1645 }
1646
1647 static int coda_next_free_instance(struct coda_dev *dev)
1648 {
1649         int idx = ffz(dev->instance_mask);
1650
1651         if ((idx < 0) ||
1652             (dev->devtype->product == CODA_DX6 && idx > CODADX6_MAX_INSTANCES))
1653                 return -EBUSY;
1654
1655         return idx;
1656 }
1657
1658 /*
1659  * File operations
1660  */
1661
1662 static int coda_open(struct file *file)
1663 {
1664         struct video_device *vdev = video_devdata(file);
1665         struct coda_dev *dev = video_get_drvdata(vdev);
1666         struct coda_ctx *ctx = NULL;
1667         char *name;
1668         int ret;
1669         int idx;
1670
1671         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1672         if (!ctx)
1673                 return -ENOMEM;
1674
1675         idx = coda_next_free_instance(dev);
1676         if (idx < 0) {
1677                 ret = idx;
1678                 goto err_coda_max;
1679         }
1680         set_bit(idx, &dev->instance_mask);
1681
1682         name = kasprintf(GFP_KERNEL, "context%d", idx);
1683         if (!name) {
1684                 ret = -ENOMEM;
1685                 goto err_coda_name_init;
1686         }
1687
1688         ctx->debugfs_entry = debugfs_create_dir(name, dev->debugfs_root);
1689         kfree(name);
1690
1691         ctx->cvd = to_coda_video_device(vdev);
1692         ctx->inst_type = ctx->cvd->type;
1693         ctx->ops = ctx->cvd->ops;
1694         ctx->use_bit = !ctx->cvd->direct;
1695         init_completion(&ctx->completion);
1696         INIT_WORK(&ctx->pic_run_work, coda_pic_run_work);
1697         if (ctx->ops->seq_end_work)
1698                 INIT_WORK(&ctx->seq_end_work, ctx->ops->seq_end_work);
1699         v4l2_fh_init(&ctx->fh, video_devdata(file));
1700         file->private_data = &ctx->fh;
1701         v4l2_fh_add(&ctx->fh);
1702         ctx->dev = dev;
1703         ctx->idx = idx;
1704         switch (dev->devtype->product) {
1705         case CODA_960:
1706                 ctx->frame_mem_ctrl = 1 << 12;
1707                 /* fallthrough */
1708         case CODA_7541:
1709                 ctx->reg_idx = 0;
1710                 break;
1711         default:
1712                 ctx->reg_idx = idx;
1713         }
1714
1715         /* Power up and upload firmware if necessary */
1716         ret = pm_runtime_get_sync(&dev->plat_dev->dev);
1717         if (ret < 0) {
1718                 v4l2_err(&dev->v4l2_dev, "failed to power up: %d\n", ret);
1719                 goto err_pm_get;
1720         }
1721
1722         ret = clk_prepare_enable(dev->clk_per);
1723         if (ret)
1724                 goto err_clk_per;
1725
1726         ret = clk_prepare_enable(dev->clk_ahb);
1727         if (ret)
1728                 goto err_clk_ahb;
1729
1730         set_default_params(ctx);
1731         ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
1732                                             ctx->ops->queue_init);
1733         if (IS_ERR(ctx->fh.m2m_ctx)) {
1734                 ret = PTR_ERR(ctx->fh.m2m_ctx);
1735
1736                 v4l2_err(&dev->v4l2_dev, "%s return error (%d)\n",
1737                          __func__, ret);
1738                 goto err_ctx_init;
1739         }
1740
1741         ret = coda_ctrls_setup(ctx);
1742         if (ret) {
1743                 v4l2_err(&dev->v4l2_dev, "failed to setup coda controls\n");
1744                 goto err_ctrls_setup;
1745         }
1746
1747         ctx->fh.ctrl_handler = &ctx->ctrls;
1748
1749         mutex_init(&ctx->bitstream_mutex);
1750         mutex_init(&ctx->buffer_mutex);
1751         INIT_LIST_HEAD(&ctx->buffer_meta_list);
1752         spin_lock_init(&ctx->buffer_meta_lock);
1753
1754         coda_lock(ctx);
1755         list_add(&ctx->list, &dev->instances);
1756         coda_unlock(ctx);
1757
1758         v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Created instance %d (%p)\n",
1759                  ctx->idx, ctx);
1760
1761         return 0;
1762
1763 err_ctrls_setup:
1764         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1765 err_ctx_init:
1766         clk_disable_unprepare(dev->clk_ahb);
1767 err_clk_ahb:
1768         clk_disable_unprepare(dev->clk_per);
1769 err_clk_per:
1770         pm_runtime_put_sync(&dev->plat_dev->dev);
1771 err_pm_get:
1772         v4l2_fh_del(&ctx->fh);
1773         v4l2_fh_exit(&ctx->fh);
1774         clear_bit(ctx->idx, &dev->instance_mask);
1775 err_coda_name_init:
1776 err_coda_max:
1777         kfree(ctx);
1778         return ret;
1779 }
1780
1781 static int coda_release(struct file *file)
1782 {
1783         struct coda_dev *dev = video_drvdata(file);
1784         struct coda_ctx *ctx = fh_to_ctx(file->private_data);
1785
1786         v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Releasing instance %p\n",
1787                  ctx);
1788
1789         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
1790                 coda_bit_stream_end_flag(ctx);
1791
1792         /* If this instance is running, call .job_abort and wait for it to end */
1793         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1794
1795         /* In case the instance was not running, we still need to call SEQ_END */
1796         if (ctx->ops->seq_end_work) {
1797                 queue_work(dev->workqueue, &ctx->seq_end_work);
1798                 flush_work(&ctx->seq_end_work);
1799         }
1800
1801         coda_lock(ctx);
1802         list_del(&ctx->list);
1803         coda_unlock(ctx);
1804
1805         if (ctx->dev->devtype->product == CODA_DX6)
1806                 coda_free_aux_buf(dev, &ctx->workbuf);
1807
1808         v4l2_ctrl_handler_free(&ctx->ctrls);
1809         clk_disable_unprepare(dev->clk_ahb);
1810         clk_disable_unprepare(dev->clk_per);
1811         pm_runtime_put_sync(&dev->plat_dev->dev);
1812         v4l2_fh_del(&ctx->fh);
1813         v4l2_fh_exit(&ctx->fh);
1814         clear_bit(ctx->idx, &dev->instance_mask);
1815         if (ctx->ops->release)
1816                 ctx->ops->release(ctx);
1817         debugfs_remove_recursive(ctx->debugfs_entry);
1818         kfree(ctx);
1819
1820         return 0;
1821 }
1822
1823 static const struct v4l2_file_operations coda_fops = {
1824         .owner          = THIS_MODULE,
1825         .open           = coda_open,
1826         .release        = coda_release,
1827         .poll           = v4l2_m2m_fop_poll,
1828         .unlocked_ioctl = video_ioctl2,
1829         .mmap           = v4l2_m2m_fop_mmap,
1830 };
1831
1832 static int coda_hw_init(struct coda_dev *dev)
1833 {
1834         u32 data;
1835         u16 *p;
1836         int i, ret;
1837
1838         ret = clk_prepare_enable(dev->clk_per);
1839         if (ret)
1840                 goto err_clk_per;
1841
1842         ret = clk_prepare_enable(dev->clk_ahb);
1843         if (ret)
1844                 goto err_clk_ahb;
1845
1846         if (dev->rstc)
1847                 reset_control_reset(dev->rstc);
1848
1849         /*
1850          * Copy the first CODA_ISRAM_SIZE in the internal SRAM.
1851          * The 16-bit chars in the code buffer are in memory access
1852          * order, re-sort them to CODA order for register download.
1853          * Data in this SRAM survives a reboot.
1854          */
1855         p = (u16 *)dev->codebuf.vaddr;
1856         if (dev->devtype->product == CODA_DX6) {
1857                 for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++)  {
1858                         data = CODA_DOWN_ADDRESS_SET(i) |
1859                                 CODA_DOWN_DATA_SET(p[i ^ 1]);
1860                         coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
1861                 }
1862         } else {
1863                 for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
1864                         data = CODA_DOWN_ADDRESS_SET(i) |
1865                                 CODA_DOWN_DATA_SET(p[round_down(i, 4) +
1866                                                         3 - (i % 4)]);
1867                         coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
1868                 }
1869         }
1870
1871         /* Clear registers */
1872         for (i = 0; i < 64; i++)
1873                 coda_write(dev, 0, CODA_REG_BIT_CODE_BUF_ADDR + i * 4);
1874
1875         /* Tell the BIT where to find everything it needs */
1876         if (dev->devtype->product == CODA_960 ||
1877             dev->devtype->product == CODA_7541) {
1878                 coda_write(dev, dev->tempbuf.paddr,
1879                                 CODA_REG_BIT_TEMP_BUF_ADDR);
1880                 coda_write(dev, 0, CODA_REG_BIT_BIT_STREAM_PARAM);
1881         } else {
1882                 coda_write(dev, dev->workbuf.paddr,
1883                               CODA_REG_BIT_WORK_BUF_ADDR);
1884         }
1885         coda_write(dev, dev->codebuf.paddr,
1886                       CODA_REG_BIT_CODE_BUF_ADDR);
1887         coda_write(dev, 0, CODA_REG_BIT_CODE_RUN);
1888
1889         /* Set default values */
1890         switch (dev->devtype->product) {
1891         case CODA_DX6:
1892                 coda_write(dev, CODADX6_STREAM_BUF_PIC_FLUSH,
1893                            CODA_REG_BIT_STREAM_CTRL);
1894                 break;
1895         default:
1896                 coda_write(dev, CODA7_STREAM_BUF_PIC_FLUSH,
1897                            CODA_REG_BIT_STREAM_CTRL);
1898         }
1899         if (dev->devtype->product == CODA_960)
1900                 coda_write(dev, 1 << 12, CODA_REG_BIT_FRAME_MEM_CTRL);
1901         else
1902                 coda_write(dev, 0, CODA_REG_BIT_FRAME_MEM_CTRL);
1903
1904         if (dev->devtype->product != CODA_DX6)
1905                 coda_write(dev, 0, CODA7_REG_BIT_AXI_SRAM_USE);
1906
1907         coda_write(dev, CODA_INT_INTERRUPT_ENABLE,
1908                       CODA_REG_BIT_INT_ENABLE);
1909
1910         /* Reset VPU and start processor */
1911         data = coda_read(dev, CODA_REG_BIT_CODE_RESET);
1912         data |= CODA_REG_RESET_ENABLE;
1913         coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
1914         udelay(10);
1915         data &= ~CODA_REG_RESET_ENABLE;
1916         coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
1917         coda_write(dev, CODA_REG_RUN_ENABLE, CODA_REG_BIT_CODE_RUN);
1918
1919         clk_disable_unprepare(dev->clk_ahb);
1920         clk_disable_unprepare(dev->clk_per);
1921
1922         return 0;
1923
1924 err_clk_ahb:
1925         clk_disable_unprepare(dev->clk_per);
1926 err_clk_per:
1927         return ret;
1928 }
1929
1930 static int coda_register_device(struct coda_dev *dev, int i)
1931 {
1932         struct video_device *vfd = &dev->vfd[i];
1933
1934         if (i >= dev->devtype->num_vdevs)
1935                 return -EINVAL;
1936
1937         strlcpy(vfd->name, dev->devtype->vdevs[i]->name, sizeof(vfd->name));
1938         vfd->fops       = &coda_fops;
1939         vfd->ioctl_ops  = &coda_ioctl_ops;
1940         vfd->release    = video_device_release_empty,
1941         vfd->lock       = &dev->dev_mutex;
1942         vfd->v4l2_dev   = &dev->v4l2_dev;
1943         vfd->vfl_dir    = VFL_DIR_M2M;
1944         video_set_drvdata(vfd, dev);
1945
1946         /* Not applicable, use the selection API instead */
1947         v4l2_disable_ioctl(vfd, VIDIOC_CROPCAP);
1948         v4l2_disable_ioctl(vfd, VIDIOC_G_CROP);
1949         v4l2_disable_ioctl(vfd, VIDIOC_S_CROP);
1950
1951         return video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1952 }
1953
1954 static void coda_fw_callback(const struct firmware *fw, void *context)
1955 {
1956         struct coda_dev *dev = context;
1957         struct platform_device *pdev = dev->plat_dev;
1958         int i, ret;
1959
1960         if (!fw) {
1961                 v4l2_err(&dev->v4l2_dev, "firmware request failed\n");
1962                 goto put_pm;
1963         }
1964
1965         /* allocate auxiliary per-device code buffer for the BIT processor */
1966         ret = coda_alloc_aux_buf(dev, &dev->codebuf, fw->size, "codebuf",
1967                                  dev->debugfs_root);
1968         if (ret < 0)
1969                 goto put_pm;
1970
1971         /* Copy the whole firmware image to the code buffer */
1972         memcpy(dev->codebuf.vaddr, fw->data, fw->size);
1973         release_firmware(fw);
1974
1975         ret = coda_hw_init(dev);
1976         if (ret < 0) {
1977                 v4l2_err(&dev->v4l2_dev, "HW initialization failed\n");
1978                 goto put_pm;
1979         }
1980
1981         ret = coda_check_firmware(dev);
1982         if (ret < 0)
1983                 goto put_pm;
1984
1985         dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1986         if (IS_ERR(dev->alloc_ctx)) {
1987                 v4l2_err(&dev->v4l2_dev, "Failed to alloc vb2 context\n");
1988                 goto put_pm;
1989         }
1990
1991         dev->m2m_dev = v4l2_m2m_init(&coda_m2m_ops);
1992         if (IS_ERR(dev->m2m_dev)) {
1993                 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1994                 goto rel_ctx;
1995         }
1996
1997         for (i = 0; i < dev->devtype->num_vdevs; i++) {
1998                 ret = coda_register_device(dev, i);
1999                 if (ret) {
2000                         v4l2_err(&dev->v4l2_dev,
2001                                  "Failed to register %s video device: %d\n",
2002                                  dev->devtype->vdevs[i]->name, ret);
2003                         goto rel_vfd;
2004                 }
2005         }
2006
2007         v4l2_info(&dev->v4l2_dev, "codec registered as /dev/video[%d-%d]\n",
2008                   dev->vfd[0].num, dev->vfd[i - 1].num);
2009
2010         pm_runtime_put_sync(&pdev->dev);
2011         return;
2012
2013 rel_vfd:
2014         while (--i >= 0)
2015                 video_unregister_device(&dev->vfd[i]);
2016         v4l2_m2m_release(dev->m2m_dev);
2017 rel_ctx:
2018         vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
2019 put_pm:
2020         pm_runtime_put_sync(&pdev->dev);
2021 }
2022
2023 static int coda_firmware_request(struct coda_dev *dev)
2024 {
2025         char *fw = dev->devtype->firmware;
2026
2027         dev_dbg(&dev->plat_dev->dev, "requesting firmware '%s' for %s\n", fw,
2028                 coda_product_name(dev->devtype->product));
2029
2030         return request_firmware_nowait(THIS_MODULE, true,
2031                 fw, &dev->plat_dev->dev, GFP_KERNEL, dev, coda_fw_callback);
2032 }
2033
2034 enum coda_platform {
2035         CODA_IMX27,
2036         CODA_IMX53,
2037         CODA_IMX6Q,
2038         CODA_IMX6DL,
2039 };
2040
2041 static const struct coda_devtype coda_devdata[] = {
2042         [CODA_IMX27] = {
2043                 .firmware     = "v4l-codadx6-imx27.bin",
2044                 .product      = CODA_DX6,
2045                 .codecs       = codadx6_codecs,
2046                 .num_codecs   = ARRAY_SIZE(codadx6_codecs),
2047                 .vdevs        = codadx6_video_devices,
2048                 .num_vdevs    = ARRAY_SIZE(codadx6_video_devices),
2049                 .workbuf_size = 288 * 1024 + FMO_SLICE_SAVE_BUF_SIZE * 8 * 1024,
2050                 .iram_size    = 0xb000,
2051         },
2052         [CODA_IMX53] = {
2053                 .firmware     = "v4l-coda7541-imx53.bin",
2054                 .product      = CODA_7541,
2055                 .codecs       = coda7_codecs,
2056                 .num_codecs   = ARRAY_SIZE(coda7_codecs),
2057                 .vdevs        = coda7_video_devices,
2058                 .num_vdevs    = ARRAY_SIZE(coda7_video_devices),
2059                 .workbuf_size = 128 * 1024,
2060                 .tempbuf_size = 304 * 1024,
2061                 .iram_size    = 0x14000,
2062         },
2063         [CODA_IMX6Q] = {
2064                 .firmware     = "v4l-coda960-imx6q.bin",
2065                 .product      = CODA_960,
2066                 .codecs       = coda9_codecs,
2067                 .num_codecs   = ARRAY_SIZE(coda9_codecs),
2068                 .vdevs        = coda9_video_devices,
2069                 .num_vdevs    = ARRAY_SIZE(coda9_video_devices),
2070                 .workbuf_size = 80 * 1024,
2071                 .tempbuf_size = 204 * 1024,
2072                 .iram_size    = 0x21000,
2073         },
2074         [CODA_IMX6DL] = {
2075                 .firmware     = "v4l-coda960-imx6dl.bin",
2076                 .product      = CODA_960,
2077                 .codecs       = coda9_codecs,
2078                 .num_codecs   = ARRAY_SIZE(coda9_codecs),
2079                 .vdevs        = coda9_video_devices,
2080                 .num_vdevs    = ARRAY_SIZE(coda9_video_devices),
2081                 .workbuf_size = 80 * 1024,
2082                 .tempbuf_size = 204 * 1024,
2083                 .iram_size    = 0x20000,
2084         },
2085 };
2086
2087 static struct platform_device_id coda_platform_ids[] = {
2088         { .name = "coda-imx27", .driver_data = CODA_IMX27 },
2089         { /* sentinel */ }
2090 };
2091 MODULE_DEVICE_TABLE(platform, coda_platform_ids);
2092
2093 #ifdef CONFIG_OF
2094 static const struct of_device_id coda_dt_ids[] = {
2095         { .compatible = "fsl,imx27-vpu", .data = &coda_devdata[CODA_IMX27] },
2096         { .compatible = "fsl,imx53-vpu", .data = &coda_devdata[CODA_IMX53] },
2097         { .compatible = "fsl,imx6q-vpu", .data = &coda_devdata[CODA_IMX6Q] },
2098         { .compatible = "fsl,imx6dl-vpu", .data = &coda_devdata[CODA_IMX6DL] },
2099         { /* sentinel */ }
2100 };
2101 MODULE_DEVICE_TABLE(of, coda_dt_ids);
2102 #endif
2103
2104 static int coda_probe(struct platform_device *pdev)
2105 {
2106         const struct of_device_id *of_id =
2107                         of_match_device(of_match_ptr(coda_dt_ids), &pdev->dev);
2108         const struct platform_device_id *pdev_id;
2109         struct coda_platform_data *pdata = pdev->dev.platform_data;
2110         struct device_node *np = pdev->dev.of_node;
2111         struct gen_pool *pool;
2112         struct coda_dev *dev;
2113         struct resource *res;
2114         int ret, irq;
2115
2116         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
2117         if (!dev)
2118                 return -ENOMEM;
2119
2120         pdev_id = of_id ? of_id->data : platform_get_device_id(pdev);
2121
2122         if (of_id) {
2123                 dev->devtype = of_id->data;
2124         } else if (pdev_id) {
2125                 dev->devtype = &coda_devdata[pdev_id->driver_data];
2126         } else {
2127                 ret = -EINVAL;
2128                 goto err_v4l2_register;
2129         }
2130
2131         spin_lock_init(&dev->irqlock);
2132         INIT_LIST_HEAD(&dev->instances);
2133
2134         dev->plat_dev = pdev;
2135         dev->clk_per = devm_clk_get(&pdev->dev, "per");
2136         if (IS_ERR(dev->clk_per)) {
2137                 dev_err(&pdev->dev, "Could not get per clock\n");
2138                 return PTR_ERR(dev->clk_per);
2139         }
2140
2141         dev->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
2142         if (IS_ERR(dev->clk_ahb)) {
2143                 dev_err(&pdev->dev, "Could not get ahb clock\n");
2144                 return PTR_ERR(dev->clk_ahb);
2145         }
2146
2147         /* Get  memory for physical registers */
2148         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2149         dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
2150         if (IS_ERR(dev->regs_base))
2151                 return PTR_ERR(dev->regs_base);
2152
2153         /* IRQ */
2154         irq = platform_get_irq_byname(pdev, "bit");
2155         if (irq < 0)
2156                 irq = platform_get_irq(pdev, 0);
2157         if (irq < 0) {
2158                 dev_err(&pdev->dev, "failed to get irq resource\n");
2159                 return irq;
2160         }
2161
2162         ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, coda_irq_handler,
2163                         IRQF_ONESHOT, dev_name(&pdev->dev), dev);
2164         if (ret < 0) {
2165                 dev_err(&pdev->dev, "failed to request irq: %d\n", ret);
2166                 return ret;
2167         }
2168
2169         dev->rstc = devm_reset_control_get_optional(&pdev->dev, NULL);
2170         if (IS_ERR(dev->rstc)) {
2171                 ret = PTR_ERR(dev->rstc);
2172                 if (ret == -ENOENT || ret == -ENOSYS) {
2173                         dev->rstc = NULL;
2174                 } else {
2175                         dev_err(&pdev->dev, "failed get reset control: %d\n",
2176                                 ret);
2177                         return ret;
2178                 }
2179         }
2180
2181         /* Get IRAM pool from device tree or platform data */
2182         pool = of_gen_pool_get(np, "iram", 0);
2183         if (!pool && pdata)
2184                 pool = gen_pool_get(pdata->iram_dev, NULL);
2185         if (!pool) {
2186                 dev_err(&pdev->dev, "iram pool not available\n");
2187                 return -ENOMEM;
2188         }
2189         dev->iram_pool = pool;
2190
2191         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
2192         if (ret)
2193                 return ret;
2194
2195         mutex_init(&dev->dev_mutex);
2196         mutex_init(&dev->coda_mutex);
2197
2198         dev->debugfs_root = debugfs_create_dir("coda", NULL);
2199         if (!dev->debugfs_root)
2200                 dev_warn(&pdev->dev, "failed to create debugfs root\n");
2201
2202         /* allocate auxiliary per-device buffers for the BIT processor */
2203         if (dev->devtype->product == CODA_DX6) {
2204                 ret = coda_alloc_aux_buf(dev, &dev->workbuf,
2205                                          dev->devtype->workbuf_size, "workbuf",
2206                                          dev->debugfs_root);
2207                 if (ret < 0)
2208                         goto err_v4l2_register;
2209         }
2210
2211         if (dev->devtype->tempbuf_size) {
2212                 ret = coda_alloc_aux_buf(dev, &dev->tempbuf,
2213                                          dev->devtype->tempbuf_size, "tempbuf",
2214                                          dev->debugfs_root);
2215                 if (ret < 0)
2216                         goto err_v4l2_register;
2217         }
2218
2219         dev->iram.size = dev->devtype->iram_size;
2220         dev->iram.vaddr = gen_pool_dma_alloc(dev->iram_pool, dev->iram.size,
2221                                              &dev->iram.paddr);
2222         if (!dev->iram.vaddr) {
2223                 dev_warn(&pdev->dev, "unable to alloc iram\n");
2224         } else {
2225                 memset(dev->iram.vaddr, 0, dev->iram.size);
2226                 dev->iram.blob.data = dev->iram.vaddr;
2227                 dev->iram.blob.size = dev->iram.size;
2228                 dev->iram.dentry = debugfs_create_blob("iram", 0644,
2229                                                        dev->debugfs_root,
2230                                                        &dev->iram.blob);
2231         }
2232
2233         dev->workqueue = alloc_workqueue("coda", WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
2234         if (!dev->workqueue) {
2235                 dev_err(&pdev->dev, "unable to alloc workqueue\n");
2236                 ret = -ENOMEM;
2237                 goto err_v4l2_register;
2238         }
2239
2240         platform_set_drvdata(pdev, dev);
2241
2242         /*
2243          * Start activated so we can directly call coda_hw_init in
2244          * coda_fw_callback regardless of whether CONFIG_PM is
2245          * enabled or whether the device is associated with a PM domain.
2246          */
2247         pm_runtime_get_noresume(&pdev->dev);
2248         pm_runtime_set_active(&pdev->dev);
2249         pm_runtime_enable(&pdev->dev);
2250
2251         return coda_firmware_request(dev);
2252
2253 err_v4l2_register:
2254         v4l2_device_unregister(&dev->v4l2_dev);
2255         return ret;
2256 }
2257
2258 static int coda_remove(struct platform_device *pdev)
2259 {
2260         struct coda_dev *dev = platform_get_drvdata(pdev);
2261         int i;
2262
2263         for (i = 0; i < ARRAY_SIZE(dev->vfd); i++) {
2264                 if (video_get_drvdata(&dev->vfd[i]))
2265                         video_unregister_device(&dev->vfd[i]);
2266         }
2267         if (dev->m2m_dev)
2268                 v4l2_m2m_release(dev->m2m_dev);
2269         pm_runtime_disable(&pdev->dev);
2270         if (dev->alloc_ctx)
2271                 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
2272         v4l2_device_unregister(&dev->v4l2_dev);
2273         destroy_workqueue(dev->workqueue);
2274         if (dev->iram.vaddr)
2275                 gen_pool_free(dev->iram_pool, (unsigned long)dev->iram.vaddr,
2276                               dev->iram.size);
2277         coda_free_aux_buf(dev, &dev->codebuf);
2278         coda_free_aux_buf(dev, &dev->tempbuf);
2279         coda_free_aux_buf(dev, &dev->workbuf);
2280         debugfs_remove_recursive(dev->debugfs_root);
2281         return 0;
2282 }
2283
2284 #ifdef CONFIG_PM
2285 static int coda_runtime_resume(struct device *dev)
2286 {
2287         struct coda_dev *cdev = dev_get_drvdata(dev);
2288         int ret = 0;
2289
2290         if (dev->pm_domain && cdev->codebuf.vaddr) {
2291                 ret = coda_hw_init(cdev);
2292                 if (ret)
2293                         v4l2_err(&cdev->v4l2_dev, "HW initialization failed\n");
2294         }
2295
2296         return ret;
2297 }
2298 #endif
2299
2300 static const struct dev_pm_ops coda_pm_ops = {
2301         SET_RUNTIME_PM_OPS(NULL, coda_runtime_resume, NULL)
2302 };
2303
2304 static struct platform_driver coda_driver = {
2305         .probe  = coda_probe,
2306         .remove = coda_remove,
2307         .driver = {
2308                 .name   = CODA_NAME,
2309                 .of_match_table = of_match_ptr(coda_dt_ids),
2310                 .pm     = &coda_pm_ops,
2311         },
2312         .id_table = coda_platform_ids,
2313 };
2314
2315 module_platform_driver(coda_driver);
2316
2317 MODULE_LICENSE("GPL");
2318 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>");
2319 MODULE_DESCRIPTION("Coda multi-standard codec V4L2 driver");