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/media/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_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 135         CODA_CODEC(CODA7_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 136         CODA_CODEC(CODA7_MODE_DECODE_MJPG, V4L2_PIX_FMT_JPEG,   V4L2_PIX_FMT_YUV420, 8192, 8192),
 137 };
 138
 139 static const struct coda_codec coda9_codecs[] = {
 140         CODA_CODEC(CODA9_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1920, 1088),
 141         CODA_CODEC(CODA9_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1920, 1088),
 142         CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
 143         CODA_CODEC(CODA9_MODE_DECODE_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 144         CODA_CODEC(CODA9_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 145 };
 146
 147 struct coda_video_device {
 148         const char *name;
 149         enum coda_inst_type type;
 150         const struct coda_context_ops *ops;
 151         bool direct;
 152         u32 src_formats[CODA_MAX_FORMATS];
 153         u32 dst_formats[CODA_MAX_FORMATS];
 154 };
 155
 156 static const struct coda_video_device coda_bit_encoder = {
 157         .name = "coda-encoder",
 158         .type = CODA_INST_ENCODER,
 159         .ops = &coda_bit_encode_ops,
 160         .src_formats = {
 161                 V4L2_PIX_FMT_NV12,
 162                 V4L2_PIX_FMT_YUV420,
 163                 V4L2_PIX_FMT_YVU420,
 164         },
 165         .dst_formats = {
 166                 V4L2_PIX_FMT_H264,
 167                 V4L2_PIX_FMT_MPEG4,
 168         },
 169 };
 170
 171 static const struct coda_video_device coda_bit_jpeg_encoder = {
 172         .name = "coda-jpeg-encoder",
 173         .type = CODA_INST_ENCODER,
 174         .ops = &coda_bit_encode_ops,
 175         .src_formats = {
 176                 V4L2_PIX_FMT_NV12,
 177                 V4L2_PIX_FMT_YUV420,
 178                 V4L2_PIX_FMT_YVU420,
 179                 V4L2_PIX_FMT_YUV422P,
 180         },
 181         .dst_formats = {
 182                 V4L2_PIX_FMT_JPEG,
 183         },
 184 };
 185
 186 static const struct coda_video_device coda_bit_decoder = {
 187         .name = "coda-decoder",
 188         .type = CODA_INST_DECODER,
 189         .ops = &coda_bit_decode_ops,
 190         .src_formats = {
 191                 V4L2_PIX_FMT_H264,
 192                 V4L2_PIX_FMT_MPEG2,
 193                 V4L2_PIX_FMT_MPEG4,
 194         },
 195         .dst_formats = {
 196                 V4L2_PIX_FMT_NV12,
 197                 V4L2_PIX_FMT_YUV420,
 198                 V4L2_PIX_FMT_YVU420,
 199         },
 200 };
 201
 202 static const struct coda_video_device coda_bit_jpeg_decoder = {
 203         .name = "coda-jpeg-decoder",
 204         .type = CODA_INST_DECODER,
 205         .ops = &coda_bit_decode_ops,
 206         .src_formats = {
 207                 V4L2_PIX_FMT_JPEG,
 208         },
 209         .dst_formats = {
 210                 V4L2_PIX_FMT_NV12,
 211                 V4L2_PIX_FMT_YUV420,
 212                 V4L2_PIX_FMT_YVU420,
 213                 V4L2_PIX_FMT_YUV422P,
 214         },
 215 };
 216
 217 static const struct coda_video_device *codadx6_video_devices[] = {
 218         &coda_bit_encoder,
 219 };
 220
 221 static const struct coda_video_device *coda7_video_devices[] = {
 222         &coda_bit_jpeg_encoder,
 223         &coda_bit_jpeg_decoder,
 224         &coda_bit_encoder,
 225         &coda_bit_decoder,
 226 };
 227
 228 static const struct coda_video_device *coda9_video_devices[] = {
 229         &coda_bit_encoder,
 230         &coda_bit_decoder,
 231 };
 232
 233 /*
 234  * Normalize all supported YUV 4:2:0 formats to the value used in the codec
 235  * tables.
 236  */
 237 static u32 coda_format_normalize_yuv(u32 fourcc)
 238 {
 239         switch (fourcc) {
 240         case V4L2_PIX_FMT_NV12:
 241         case V4L2_PIX_FMT_YUV420:
 242         case V4L2_PIX_FMT_YVU420:
 243         case V4L2_PIX_FMT_YUV422P:
 244                 return V4L2_PIX_FMT_YUV420;
 245         default:
 246                 return fourcc;
 247         }
 248 }
 249
 250 static const struct coda_codec *coda_find_codec(struct coda_dev *dev,
 251                                                 int src_fourcc, int dst_fourcc)
 252 {
 253         const struct coda_codec *codecs = dev->devtype->codecs;
 254         int num_codecs = dev->devtype->num_codecs;
 255         int k;
 256
 257         src_fourcc = coda_format_normalize_yuv(src_fourcc);
 258         dst_fourcc = coda_format_normalize_yuv(dst_fourcc);
 259         if (src_fourcc == dst_fourcc)
 260                 return NULL;
 261
 262         for (k = 0; k < num_codecs; k++) {
 263                 if (codecs[k].src_fourcc == src_fourcc &&
 264                     codecs[k].dst_fourcc == dst_fourcc)
 265                         break;
 266         }
 267
 268         if (k == num_codecs)
 269                 return NULL;
 270
 271         return &codecs[k];
 272 }
 273
 274 static void coda_get_max_dimensions(struct coda_dev *dev,
 275                                     const struct coda_codec *codec,
 276                                     int *max_w, int *max_h)
 277 {
 278         const struct coda_codec *codecs = dev->devtype->codecs;
 279         int num_codecs = dev->devtype->num_codecs;
 280         unsigned int w, h;
 281         int k;
 282
 283         if (codec) {
 284                 w = codec->max_w;
 285                 h = codec->max_h;
 286         } else {
 287                 for (k = 0, w = 0, h = 0; k < num_codecs; k++) {
 288                         w = max(w, codecs[k].max_w);
 289                         h = max(h, codecs[k].max_h);
 290                 }
 291         }
 292
 293         if (max_w)
 294                 *max_w = w;
 295         if (max_h)
 296                 *max_h = h;
 297 }
 298
 299 static const struct coda_video_device *to_coda_video_device(struct video_device
 300                                                             *vdev)
 301 {
 302         struct coda_dev *dev = video_get_drvdata(vdev);
 303         unsigned int i = vdev - dev->vfd;
 304
 305         if (i >= dev->devtype->num_vdevs)
 306                 return NULL;
 307
 308         return dev->devtype->vdevs[i];
 309 }
 310
 311 const char *coda_product_name(int product)
 312 {
 313         static char buf[9];
 314
 315         switch (product) {
 316         case CODA_DX6:
 317                 return "CodaDx6";
 318         case CODA_7541:
 319                 return "CODA7541";
 320         case CODA_960:
 321                 return "CODA960";
 322         default:
 323                 snprintf(buf, sizeof(buf), "(0x%04x)", product);
 324                 return buf;
 325         }
 326 }
 327
 328 /*
 329  * V4L2 ioctl() operations.
 330  */
 331 static int coda_querycap(struct file *file, void *priv,
 332                          struct v4l2_capability *cap)
 333 {
 334         struct coda_ctx *ctx = fh_to_ctx(priv);
 335
 336         strlcpy(cap->driver, CODA_NAME, sizeof(cap->driver));
 337         strlcpy(cap->card, coda_product_name(ctx->dev->devtype->product),
 338                 sizeof(cap->card));
 339         strlcpy(cap->bus_info, "platform:" CODA_NAME, sizeof(cap->bus_info));
 340         cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
 341         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 342
 343         return 0;
 344 }
 345
 346 static int coda_enum_fmt(struct file *file, void *priv,
 347                          struct v4l2_fmtdesc *f)
 348 {
 349         struct video_device *vdev = video_devdata(file);
 350         const struct coda_video_device *cvd = to_coda_video_device(vdev);
 351         const u32 *formats;
 352
 353         if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 354                 formats = cvd->src_formats;
 355         else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 356                 formats = cvd->dst_formats;
 357         else
 358                 return -EINVAL;
 359
 360         if (f->index >= CODA_MAX_FORMATS || formats[f->index] == 0)
 361                 return -EINVAL;
 362
 363         f->pixelformat = formats[f->index];
 364
 365         return 0;
 366 }
 367
 368 static int coda_g_fmt(struct file *file, void *priv,
 369                       struct v4l2_format *f)
 370 {
 371         struct coda_q_data *q_data;
 372         struct coda_ctx *ctx = fh_to_ctx(priv);
 373
 374         q_data = get_q_data(ctx, f->type);
 375         if (!q_data)
 376                 return -EINVAL;
 377
 378         f->fmt.pix.field        = V4L2_FIELD_NONE;
 379         f->fmt.pix.pixelformat  = q_data->fourcc;
 380         f->fmt.pix.width        = q_data->width;
 381         f->fmt.pix.height       = q_data->height;
 382         f->fmt.pix.bytesperline = q_data->bytesperline;
 383
 384         f->fmt.pix.sizeimage    = q_data->sizeimage;
 385         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
 386                 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 387         else
 388                 f->fmt.pix.colorspace = ctx->colorspace;
 389
 390         return 0;
 391 }
 392
 393 static int coda_try_pixelformat(struct coda_ctx *ctx, struct v4l2_format *f)
 394 {
 395         struct coda_q_data *q_data;
 396         const u32 *formats;
 397         int i;
 398
 399         if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 400                 formats = ctx->cvd->src_formats;
 401         else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 402                 formats = ctx->cvd->dst_formats;
 403         else
 404                 return -EINVAL;
 405
 406         for (i = 0; i < CODA_MAX_FORMATS; i++) {
 407                 if (formats[i] == f->fmt.pix.pixelformat) {
 408                         f->fmt.pix.pixelformat = formats[i];
 409                         return 0;
 410                 }
 411         }
 412
 413         /* Fall back to currently set pixelformat */
 414         q_data = get_q_data(ctx, f->type);
 415         f->fmt.pix.pixelformat = q_data->fourcc;
 416
 417         return 0;
 418 }
 419
 420 static unsigned int coda_estimate_sizeimage(struct coda_ctx *ctx, u32 sizeimage,
 421                                             u32 width, u32 height)
 422 {
 423         /*
 424          * This is a rough estimate for sensible compressed buffer
 425          * sizes (between 1 and 16 bits per pixel). This could be
 426          * improved by better format specific worst case estimates.
 427          */
 428         return round_up(clamp(sizeimage, width * height / 8,
 429                                          width * height * 2), PAGE_SIZE);
 430 }
 431
 432 static int coda_try_fmt(struct coda_ctx *ctx, const struct coda_codec *codec,
 433                         struct v4l2_format *f)
 434 {
 435         struct coda_dev *dev = ctx->dev;
 436         unsigned int max_w, max_h;
 437         enum v4l2_field field;
 438
 439         field = f->fmt.pix.field;
 440         if (field == V4L2_FIELD_ANY)
 441                 field = V4L2_FIELD_NONE;
 442         else if (V4L2_FIELD_NONE != field)
 443                 return -EINVAL;
 444
 445         /* V4L2 specification suggests the driver corrects the format struct
 446          * if any of the dimensions is unsupported */
 447         f->fmt.pix.field = field;
 448
 449         coda_get_max_dimensions(dev, codec, &max_w, &max_h);
 450         v4l_bound_align_image(&f->fmt.pix.width, MIN_W, max_w, W_ALIGN,
 451                               &f->fmt.pix.height, MIN_H, max_h, H_ALIGN,
 452                               S_ALIGN);
 453
 454         switch (f->fmt.pix.pixelformat) {
 455         case V4L2_PIX_FMT_NV12:
 456         case V4L2_PIX_FMT_YUV420:
 457         case V4L2_PIX_FMT_YVU420:
 458                 /*
 459                  * Frame stride must be at least multiple of 8,
 460                  * but multiple of 16 for h.264 or JPEG 4:2:x
 461                  */
 462                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 463                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 464                                         f->fmt.pix.height * 3 / 2;
 465                 break;
 466         case V4L2_PIX_FMT_YUV422P:
 467                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 468                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 469                                         f->fmt.pix.height * 2;
 470                 break;
 471         case V4L2_PIX_FMT_JPEG:
 472                 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 473                 /* fallthrough */
 474         case V4L2_PIX_FMT_H264:
 475         case V4L2_PIX_FMT_MPEG4:
 476         case V4L2_PIX_FMT_MPEG2:
 477                 f->fmt.pix.bytesperline = 0;
 478                 f->fmt.pix.sizeimage = coda_estimate_sizeimage(ctx,
 479                                                         f->fmt.pix.sizeimage,
 480                                                         f->fmt.pix.width,
 481                                                         f->fmt.pix.height);
 482                 break;
 483         default:
 484                 BUG();
 485         }
 486
 487         return 0;
 488 }
 489
 490 static int coda_try_fmt_vid_cap(struct file *file, void *priv,
 491                                 struct v4l2_format *f)
 492 {
 493         struct coda_ctx *ctx = fh_to_ctx(priv);
 494         const struct coda_q_data *q_data_src;
 495         const struct coda_codec *codec;
 496         struct vb2_queue *src_vq;
 497         int ret;
 498
 499         ret = coda_try_pixelformat(ctx, f);
 500         if (ret < 0)
 501                 return ret;
 502
 503         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 504
 505         /*
 506          * If the source format is already fixed, only allow the same output
 507          * resolution
 508          */
 509         src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 510         if (vb2_is_streaming(src_vq)) {
 511                 f->fmt.pix.width = q_data_src->width;
 512                 f->fmt.pix.height = q_data_src->height;
 513         }
 514
 515         f->fmt.pix.colorspace = ctx->colorspace;
 516
 517         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 518         codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
 519                                 f->fmt.pix.pixelformat);
 520         if (!codec)
 521                 return -EINVAL;
 522
 523         ret = coda_try_fmt(ctx, codec, f);
 524         if (ret < 0)
 525                 return ret;
 526
 527         /* The h.264 decoder only returns complete 16x16 macroblocks */
 528         if (codec && codec->src_fourcc == V4L2_PIX_FMT_H264) {
 529                 f->fmt.pix.width = f->fmt.pix.width;
 530                 f->fmt.pix.height = round_up(f->fmt.pix.height, 16);
 531                 f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
 532                 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
 533                                        f->fmt.pix.height * 3 / 2;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int coda_try_fmt_vid_out(struct file *file, void *priv,
 540                                 struct v4l2_format *f)
 541 {
 542         struct coda_ctx *ctx = fh_to_ctx(priv);
 543         struct coda_dev *dev = ctx->dev;
 544         const struct coda_q_data *q_data_dst;
 545         const struct coda_codec *codec;
 546         int ret;
 547
 548         ret = coda_try_pixelformat(ctx, f);
 549         if (ret < 0)
 550                 return ret;
 551
 552         switch (f->fmt.pix.colorspace) {
 553         case V4L2_COLORSPACE_REC709:
 554         case V4L2_COLORSPACE_JPEG:
 555                 break;
 556         default:
 557                 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
 558                         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
 559                 else
 560                         f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
 561         }
 562
 563         q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
 564         codec = coda_find_codec(dev, f->fmt.pix.pixelformat, q_data_dst->fourcc);
 565
 566         return coda_try_fmt(ctx, codec, f);
 567 }
 568
 569 static int coda_s_fmt(struct coda_ctx *ctx, struct v4l2_format *f)
 570 {
 571         struct coda_q_data *q_data;
 572         struct vb2_queue *vq;
 573
 574         vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 575         if (!vq)
 576                 return -EINVAL;
 577
 578         q_data = get_q_data(ctx, f->type);
 579         if (!q_data)
 580                 return -EINVAL;
 581
 582         if (vb2_is_busy(vq)) {
 583                 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
 584                 return -EBUSY;
 585         }
 586
 587         q_data->fourcc = f->fmt.pix.pixelformat;
 588         q_data->width = f->fmt.pix.width;
 589         q_data->height = f->fmt.pix.height;
 590         q_data->bytesperline = f->fmt.pix.bytesperline;
 591         q_data->sizeimage = f->fmt.pix.sizeimage;
 592         q_data->rect.left = 0;
 593         q_data->rect.top = 0;
 594         q_data->rect.width = f->fmt.pix.width;
 595         q_data->rect.height = f->fmt.pix.height;
 596
 597         switch (f->fmt.pix.pixelformat) {
 598         case V4L2_PIX_FMT_NV12:
 599                 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 600                         ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
 601                         if (!disable_tiling)
 602                                 break;
 603                 }
 604                 /* else fall through */
 605         case V4L2_PIX_FMT_YUV420:
 606         case V4L2_PIX_FMT_YVU420:
 607                 ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
 608                 break;
 609         default:
 610                 break;
 611         }
 612
 613         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
 614                 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
 615                 f->type, q_data->width, q_data->height, q_data->fourcc);
 616
 617         return 0;
 618 }
 619
 620 static int coda_s_fmt_vid_cap(struct file *file, void *priv,
 621                               struct v4l2_format *f)
 622 {
 623         struct coda_ctx *ctx = fh_to_ctx(priv);
 624         int ret;
 625
 626         ret = coda_try_fmt_vid_cap(file, priv, f);
 627         if (ret)
 628                 return ret;
 629
 630         return coda_s_fmt(ctx, f);
 631 }
 632
 633 static int coda_s_fmt_vid_out(struct file *file, void *priv,
 634                               struct v4l2_format *f)
 635 {
 636         struct coda_ctx *ctx = fh_to_ctx(priv);
 637         struct v4l2_format f_cap;
 638         int ret;
 639
 640         ret = coda_try_fmt_vid_out(file, priv, f);
 641         if (ret)
 642                 return ret;
 643
 644         ret = coda_s_fmt(ctx, f);
 645         if (ret)
 646                 return ret;
 647
 648         ctx->colorspace = f->fmt.pix.colorspace;
 649
 650         memset(&f_cap, 0, sizeof(f_cap));
 651         f_cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 652         coda_g_fmt(file, priv, &f_cap);
 653         f_cap.fmt.pix.width = f->fmt.pix.width;
 654         f_cap.fmt.pix.height = f->fmt.pix.height;
 655
 656         ret = coda_try_fmt_vid_cap(file, priv, &f_cap);
 657         if (ret)
 658                 return ret;
 659
 660         return coda_s_fmt(ctx, &f_cap);
 661 }
 662
 663 static int coda_reqbufs(struct file *file, void *priv,
 664                         struct v4l2_requestbuffers *rb)
 665 {
 666         struct coda_ctx *ctx = fh_to_ctx(priv);
 667         int ret;
 668
 669         ret = v4l2_m2m_reqbufs(file, ctx->fh.m2m_ctx, rb);
 670         if (ret)
 671                 return ret;
 672
 673         /*
 674          * Allow to allocate instance specific per-context buffers, such as
 675          * bitstream ringbuffer, slice buffer, work buffer, etc. if needed.
 676          */
 677         if (rb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT && ctx->ops->reqbufs)
 678                 return ctx->ops->reqbufs(ctx, rb);
 679
 680         return 0;
 681 }
 682
 683 static int coda_qbuf(struct file *file, void *priv,
 684                      struct v4l2_buffer *buf)
 685 {
 686         struct coda_ctx *ctx = fh_to_ctx(priv);
 687
 688         return v4l2_m2m_qbuf(file, ctx->fh.m2m_ctx, buf);
 689 }
 690
 691 static bool coda_buf_is_end_of_stream(struct coda_ctx *ctx,
 692                                       struct vb2_v4l2_buffer *buf)
 693 {
 694         struct vb2_queue *src_vq;
 695
 696         src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
 697
 698         return ((ctx->bit_stream_param & CODA_BIT_STREAM_END_FLAG) &&
 699                 (buf->sequence == (ctx->qsequence - 1)));
 700 }
 701
 702 void coda_m2m_buf_done(struct coda_ctx *ctx, struct vb2_v4l2_buffer *buf,
 703                        enum vb2_buffer_state state)
 704 {
 705         const struct v4l2_event eos_event = {
 706                 .type = V4L2_EVENT_EOS
 707         };
 708
 709         if (coda_buf_is_end_of_stream(ctx, buf)) {
 710                 buf->flags |= V4L2_BUF_FLAG_LAST;
 711
 712                 v4l2_event_queue_fh(&ctx->fh, &eos_event);
 713         }
 714
 715         v4l2_m2m_buf_done(buf, state);
 716 }
 717
 718 static int coda_g_selection(struct file *file, void *fh,
 719                             struct v4l2_selection *s)
 720 {
 721         struct coda_ctx *ctx = fh_to_ctx(fh);
 722         struct coda_q_data *q_data;
 723         struct v4l2_rect r, *rsel;
 724
 725         q_data = get_q_data(ctx, s->type);
 726         if (!q_data)
 727                 return -EINVAL;
 728
 729         r.left = 0;
 730         r.top = 0;
 731         r.width = q_data->width;
 732         r.height = q_data->height;
 733         rsel = &q_data->rect;
 734
 735         switch (s->target) {
 736         case V4L2_SEL_TGT_CROP_DEFAULT:
 737         case V4L2_SEL_TGT_CROP_BOUNDS:
 738                 rsel = &r;
 739                 /* fallthrough */
 740         case V4L2_SEL_TGT_CROP:
 741                 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 742                         return -EINVAL;
 743                 break;
 744         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 745         case V4L2_SEL_TGT_COMPOSE_PADDED:
 746                 rsel = &r;
 747                 /* fallthrough */
 748         case V4L2_SEL_TGT_COMPOSE:
 749         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 750                 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 751                         return -EINVAL;
 752                 break;
 753         default:
 754                 return -EINVAL;
 755         }
 756
 757         s->r = *rsel;
 758
 759         return 0;
 760 }
 761
 762 static int coda_try_decoder_cmd(struct file *file, void *fh,
 763                                 struct v4l2_decoder_cmd *dc)
 764 {
 765         if (dc->cmd != V4L2_DEC_CMD_STOP)
 766                 return -EINVAL;
 767
 768         if (dc->flags & V4L2_DEC_CMD_STOP_TO_BLACK)
 769                 return -EINVAL;
 770
 771         if (!(dc->flags & V4L2_DEC_CMD_STOP_IMMEDIATELY) && (dc->stop.pts != 0))
 772                 return -EINVAL;
 773
 774         return 0;
 775 }
 776
 777 static int coda_decoder_cmd(struct file *file, void *fh,
 778                             struct v4l2_decoder_cmd *dc)
 779 {
 780         struct coda_ctx *ctx = fh_to_ctx(fh);
 781         int ret;
 782
 783         ret = coda_try_decoder_cmd(file, fh, dc);
 784         if (ret < 0)
 785                 return ret;
 786
 787         /* Ignore decoder stop command silently in encoder context */
 788         if (ctx->inst_type != CODA_INST_DECODER)
 789                 return 0;
 790
 791         /* Set the stream-end flag on this context */
 792         coda_bit_stream_end_flag(ctx);
 793         ctx->hold = false;
 794         v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
 795
 796         return 0;
 797 }
 798
 799 static int coda_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 800 {
 801         struct coda_ctx *ctx = fh_to_ctx(fh);
 802         struct v4l2_fract *tpf;
 803
 804         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 805                 return -EINVAL;
 806
 807         a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 808         tpf = &a->parm.output.timeperframe;
 809         tpf->denominator = ctx->params.framerate & CODA_FRATE_RES_MASK;
 810         tpf->numerator = 1 + (ctx->params.framerate >>
 811                               CODA_FRATE_DIV_OFFSET);
 812
 813         return 0;
 814 }
 815
 816 /*
 817  * Approximate timeperframe v4l2_fract with values that can be written
 818  * into the 16-bit CODA_FRATE_DIV and CODA_FRATE_RES fields.
 819  */
 820 static void coda_approximate_timeperframe(struct v4l2_fract *timeperframe)
 821 {
 822         struct v4l2_fract s = *timeperframe;
 823         struct v4l2_fract f0;
 824         struct v4l2_fract f1 = { 1, 0 };
 825         struct v4l2_fract f2 = { 0, 1 };
 826         unsigned int i, div, s_denominator;
 827
 828         /* Lower bound is 1/65535 */
 829         if (s.numerator == 0 || s.denominator / s.numerator > 65535) {
 830                 timeperframe->numerator = 1;
 831                 timeperframe->denominator = 65535;
 832                 return;
 833         }
 834
 835         /* Upper bound is 65536/1, map everything above to infinity */
 836         if (s.denominator == 0 || s.numerator / s.denominator > 65536) {
 837                 timeperframe->numerator = 1;
 838                 timeperframe->denominator = 0;
 839                 return;
 840         }
 841
 842         /* Reduce fraction to lowest terms */
 843         div = gcd(s.numerator, s.denominator);
 844         if (div > 1) {
 845                 s.numerator /= div;
 846                 s.denominator /= div;
 847         }
 848
 849         if (s.numerator <= 65536 && s.denominator < 65536) {
 850                 *timeperframe = s;
 851                 return;
 852         }
 853
 854         /* Find successive convergents from continued fraction expansion */
 855         while (f2.numerator <= 65536 && f2.denominator < 65536) {
 856                 f0 = f1;
 857                 f1 = f2;
 858
 859                 /* Stop when f2 exactly equals timeperframe */
 860                 if (s.numerator == 0)
 861                         break;
 862
 863                 i = s.denominator / s.numerator;
 864
 865                 f2.numerator = f0.numerator + i * f1.numerator;
 866                 f2.denominator = f0.denominator + i * f2.denominator;
 867
 868                 s_denominator = s.numerator;
 869                 s.numerator = s.denominator % s.numerator;
 870                 s.denominator = s_denominator;
 871         }
 872
 873         *timeperframe = f1;
 874 }
 875
 876 static uint32_t coda_timeperframe_to_frate(struct v4l2_fract *timeperframe)
 877 {
 878         return ((timeperframe->numerator - 1) << CODA_FRATE_DIV_OFFSET) |
 879                 timeperframe->denominator;
 880 }
 881
 882 static int coda_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 883 {
 884         struct coda_ctx *ctx = fh_to_ctx(fh);
 885         struct v4l2_fract *tpf;
 886
 887         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 888                 return -EINVAL;
 889
 890         tpf = &a->parm.output.timeperframe;
 891         coda_approximate_timeperframe(tpf);
 892         ctx->params.framerate = coda_timeperframe_to_frate(tpf);
 893
 894         return 0;
 895 }
 896
 897 static int coda_subscribe_event(struct v4l2_fh *fh,
 898                                 const struct v4l2_event_subscription *sub)
 899 {
 900         switch (sub->type) {
 901         case V4L2_EVENT_EOS:
 902                 return v4l2_event_subscribe(fh, sub, 0, NULL);
 903         default:
 904                 return v4l2_ctrl_subscribe_event(fh, sub);
 905         }
 906 }
 907
 908 static const struct v4l2_ioctl_ops coda_ioctl_ops = {
 909         .vidioc_querycap        = coda_querycap,
 910
 911         .vidioc_enum_fmt_vid_cap = coda_enum_fmt,
 912         .vidioc_g_fmt_vid_cap   = coda_g_fmt,
 913         .vidioc_try_fmt_vid_cap = coda_try_fmt_vid_cap,
 914         .vidioc_s_fmt_vid_cap   = coda_s_fmt_vid_cap,
 915
 916         .vidioc_enum_fmt_vid_out = coda_enum_fmt,
 917         .vidioc_g_fmt_vid_out   = coda_g_fmt,
 918         .vidioc_try_fmt_vid_out = coda_try_fmt_vid_out,
 919         .vidioc_s_fmt_vid_out   = coda_s_fmt_vid_out,
 920
 921         .vidioc_reqbufs         = coda_reqbufs,
 922         .vidioc_querybuf        = v4l2_m2m_ioctl_querybuf,
 923
 924         .vidioc_qbuf            = coda_qbuf,
 925         .vidioc_expbuf          = v4l2_m2m_ioctl_expbuf,
 926         .vidioc_dqbuf           = v4l2_m2m_ioctl_dqbuf,
 927         .vidioc_create_bufs     = v4l2_m2m_ioctl_create_bufs,
 928         .vidioc_prepare_buf     = v4l2_m2m_ioctl_prepare_buf,
 929
 930         .vidioc_streamon        = v4l2_m2m_ioctl_streamon,
 931         .vidioc_streamoff       = v4l2_m2m_ioctl_streamoff,
 932
 933         .vidioc_g_selection     = coda_g_selection,
 934
 935         .vidioc_try_decoder_cmd = coda_try_decoder_cmd,
 936         .vidioc_decoder_cmd     = coda_decoder_cmd,
 937
 938         .vidioc_g_parm          = coda_g_parm,
 939         .vidioc_s_parm          = coda_s_parm,
 940
 941         .vidioc_subscribe_event = coda_subscribe_event,
 942         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 943 };
 944
 945 /*
 946  * Mem-to-mem operations.
 947  */
 948
 949 static void coda_device_run(void *m2m_priv)
 950 {
 951         struct coda_ctx *ctx = m2m_priv;
 952         struct coda_dev *dev = ctx->dev;
 953
 954         queue_work(dev->workqueue, &ctx->pic_run_work);
 955 }
 956
 957 static void coda_pic_run_work(struct work_struct *work)
 958 {
 959         struct coda_ctx *ctx = container_of(work, struct coda_ctx, pic_run_work);
 960         struct coda_dev *dev = ctx->dev;
 961         int ret;
 962
 963         mutex_lock(&ctx->buffer_mutex);
 964         mutex_lock(&dev->coda_mutex);
 965
 966         ret = ctx->ops->prepare_run(ctx);
 967         if (ret < 0 && ctx->inst_type == CODA_INST_DECODER) {
 968                 mutex_unlock(&dev->coda_mutex);
 969                 mutex_unlock(&ctx->buffer_mutex);
 970                 /* job_finish scheduled by prepare_decode */
 971                 return;
 972         }
 973
 974         if (!wait_for_completion_timeout(&ctx->completion,
 975                                          msecs_to_jiffies(1000))) {
 976                 dev_err(&dev->plat_dev->dev, "CODA PIC_RUN timeout\n");
 977
 978                 ctx->hold = true;
 979
 980                 coda_hw_reset(ctx);
 981         } else if (!ctx->aborting) {
 982                 ctx->ops->finish_run(ctx);
 983         }
 984
 985         if ((ctx->aborting || (!ctx->streamon_cap && !ctx->streamon_out)) &&
 986             ctx->ops->seq_end_work)
 987                 queue_work(dev->workqueue, &ctx->seq_end_work);
 988
 989         mutex_unlock(&dev->coda_mutex);
 990         mutex_unlock(&ctx->buffer_mutex);
 991
 992         v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 993 }
 994
 995 static int coda_job_ready(void *m2m_priv)
 996 {
 997         struct coda_ctx *ctx = m2m_priv;
 998         int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);
 999
1000         /*
1001          * For both 'P' and 'key' frame cases 1 picture
1002          * and 1 frame are needed. In the decoder case,
1003          * the compressed frame can be in the bitstream.
1004          */
1005         if (!src_bufs && ctx->inst_type != CODA_INST_DECODER) {
1006                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1007                          "not ready: not enough video buffers.\n");
1008                 return 0;
1009         }
1010
1011         if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
1012                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1013                          "not ready: not enough video capture buffers.\n");
1014                 return 0;
1015         }
1016
1017         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
1018                 bool stream_end = ctx->bit_stream_param &
1019                                   CODA_BIT_STREAM_END_FLAG;
1020                 int num_metas = ctx->num_metas;
1021
1022                 if (ctx->hold && !src_bufs) {
1023                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1024                                  "%d: not ready: on hold for more buffers.\n",
1025                                  ctx->idx);
1026                         return 0;
1027                 }
1028
1029                 if (!stream_end && (num_metas + src_bufs) < 2) {
1030                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1031                                  "%d: not ready: need 2 buffers available (%d, %d)\n",
1032                                  ctx->idx, num_metas, src_bufs);
1033                         return 0;
1034                 }
1035
1036
1037                 if (!src_bufs && !stream_end &&
1038                     (coda_get_bitstream_payload(ctx) < 512)) {
1039                         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1040                                  "%d: not ready: not enough bitstream data (%d).\n",
1041                                  ctx->idx, coda_get_bitstream_payload(ctx));
1042                         return 0;
1043                 }
1044         }
1045
1046         if (ctx->aborting) {
1047                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1048                          "not ready: aborting\n");
1049                 return 0;
1050         }
1051
1052         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1053                         "job ready\n");
1054
1055         return 1;
1056 }
1057
1058 static void coda_job_abort(void *priv)
1059 {
1060         struct coda_ctx *ctx = priv;
1061
1062         ctx->aborting = 1;
1063
1064         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1065                  "Aborting task\n");
1066 }
1067
1068 static void coda_lock(void *m2m_priv)
1069 {
1070         struct coda_ctx *ctx = m2m_priv;
1071         struct coda_dev *pcdev = ctx->dev;
1072
1073         mutex_lock(&pcdev->dev_mutex);
1074 }
1075
1076 static void coda_unlock(void *m2m_priv)
1077 {
1078         struct coda_ctx *ctx = m2m_priv;
1079         struct coda_dev *pcdev = ctx->dev;
1080
1081         mutex_unlock(&pcdev->dev_mutex);
1082 }
1083
1084 static const struct v4l2_m2m_ops coda_m2m_ops = {
1085         .device_run     = coda_device_run,
1086         .job_ready      = coda_job_ready,
1087         .job_abort      = coda_job_abort,
1088         .lock           = coda_lock,
1089         .unlock         = coda_unlock,
1090 };
1091
1092 static void set_default_params(struct coda_ctx *ctx)
1093 {
1094         unsigned int max_w, max_h, usize, csize;
1095
1096         ctx->codec = coda_find_codec(ctx->dev, ctx->cvd->src_formats[0],
1097                                      ctx->cvd->dst_formats[0]);
1098         max_w = min(ctx->codec->max_w, 1920U);
1099         max_h = min(ctx->codec->max_h, 1088U);
1100         usize = max_w * max_h * 3 / 2;
1101         csize = coda_estimate_sizeimage(ctx, usize, max_w, max_h);
1102
1103         ctx->params.codec_mode = ctx->codec->mode;
1104         ctx->colorspace = V4L2_COLORSPACE_REC709;
1105         ctx->params.framerate = 30;
1106
1107         /* Default formats for output and input queues */
1108         ctx->q_data[V4L2_M2M_SRC].fourcc = ctx->cvd->src_formats[0];
1109         ctx->q_data[V4L2_M2M_DST].fourcc = ctx->cvd->dst_formats[0];
1110         ctx->q_data[V4L2_M2M_SRC].width = max_w;
1111         ctx->q_data[V4L2_M2M_SRC].height = max_h;
1112         ctx->q_data[V4L2_M2M_DST].width = max_w;
1113         ctx->q_data[V4L2_M2M_DST].height = max_h;
1114         if (ctx->codec->src_fourcc == V4L2_PIX_FMT_YUV420) {
1115                 ctx->q_data[V4L2_M2M_SRC].bytesperline = max_w;
1116                 ctx->q_data[V4L2_M2M_SRC].sizeimage = usize;
1117                 ctx->q_data[V4L2_M2M_DST].bytesperline = 0;
1118                 ctx->q_data[V4L2_M2M_DST].sizeimage = csize;
1119         } else {
1120                 ctx->q_data[V4L2_M2M_SRC].bytesperline = 0;
1121                 ctx->q_data[V4L2_M2M_SRC].sizeimage = csize;
1122                 ctx->q_data[V4L2_M2M_DST].bytesperline = max_w;
1123                 ctx->q_data[V4L2_M2M_DST].sizeimage = usize;
1124         }
1125         ctx->q_data[V4L2_M2M_SRC].rect.width = max_w;
1126         ctx->q_data[V4L2_M2M_SRC].rect.height = max_h;
1127         ctx->q_data[V4L2_M2M_DST].rect.width = max_w;
1128         ctx->q_data[V4L2_M2M_DST].rect.height = max_h;
1129
1130         /*
1131          * Since the RBC2AXI logic only supports a single chroma plane,
1132          * macroblock tiling only works for to NV12 pixel format.
1133          */
1134         ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
1135 }
1136
1137 /*
1138  * Queue operations
1139  */
1140 static int coda_queue_setup(struct vb2_queue *vq,
1141                                 unsigned int *nbuffers, unsigned int *nplanes,
1142                                 unsigned int sizes[], void *alloc_ctxs[])
1143 {
1144         struct coda_ctx *ctx = vb2_get_drv_priv(vq);
1145         struct coda_q_data *q_data;
1146         unsigned int size;
1147
1148         q_data = get_q_data(ctx, vq->type);
1149         size = q_data->sizeimage;
1150
1151         *nplanes = 1;
1152         sizes[0] = size;
1153
1154         /* Set to vb2-dma-contig allocator context, ignored by vb2-vmalloc */
1155         alloc_ctxs[0] = ctx->dev->alloc_ctx;
1156
1157         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1158                  "get %d buffer(s) of size %d each.\n", *nbuffers, size);
1159
1160         return 0;
1161 }
1162
1163 static int coda_buf_prepare(struct vb2_buffer *vb)
1164 {
1165         struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1166         struct coda_q_data *q_data;
1167
1168         q_data = get_q_data(ctx, vb->vb2_queue->type);
1169
1170         if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
1171                 v4l2_warn(&ctx->dev->v4l2_dev,
1172                           "%s data will not fit into plane (%lu < %lu)\n",
1173                           __func__, vb2_plane_size(vb, 0),
1174                           (long)q_data->sizeimage);
1175                 return -EINVAL;
1176         }
1177
1178         return 0;
1179 }
1180
1181 static void coda_buf_queue(struct vb2_buffer *vb)
1182 {
1183         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1184         struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1185         struct vb2_queue *vq = vb->vb2_queue;
1186         struct coda_q_data *q_data;
1187
1188         q_data = get_q_data(ctx, vb->vb2_queue->type);
1189
1190         /*
1191          * In the decoder case, immediately try to copy the buffer into the
1192          * bitstream ringbuffer and mark it as ready to be dequeued.
1193          */
1194         if (ctx->bitstream.size && vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1195                 /*
1196                  * For backwards compatibility, queuing an empty buffer marks
1197                  * the stream end
1198                  */
1199                 if (vb2_get_plane_payload(vb, 0) == 0)
1200                         coda_bit_stream_end_flag(ctx);
1201                 mutex_lock(&ctx->bitstream_mutex);
1202                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1203                 if (vb2_is_streaming(vb->vb2_queue))
1204                         coda_fill_bitstream(ctx, true);
1205                 mutex_unlock(&ctx->bitstream_mutex);
1206         } else {
1207                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1208         }
1209 }
1210
1211 int coda_alloc_aux_buf(struct coda_dev *dev, struct coda_aux_buf *buf,
1212                        size_t size, const char *name, struct dentry *parent)
1213 {
1214         buf->vaddr = dma_alloc_coherent(&dev->plat_dev->dev, size, &buf->paddr,
1215                                         GFP_KERNEL);
1216         if (!buf->vaddr) {
1217                 v4l2_err(&dev->v4l2_dev,
1218                          "Failed to allocate %s buffer of size %u\n",
1219                          name, size);
1220                 return -ENOMEM;
1221         }
1222
1223         buf->size = size;
1224
1225         if (name && parent) {
1226                 buf->blob.data = buf->vaddr;
1227                 buf->blob.size = size;
1228                 buf->dentry = debugfs_create_blob(name, 0644, parent,
1229                                                   &buf->blob);
1230                 if (!buf->dentry)
1231                         dev_warn(&dev->plat_dev->dev,
1232                                  "failed to create debugfs entry %s\n", name);
1233         }
1234
1235         return 0;
1236 }
1237
1238 void coda_free_aux_buf(struct coda_dev *dev,
1239                        struct coda_aux_buf *buf)
1240 {
1241         if (buf->vaddr) {
1242                 dma_free_coherent(&dev->plat_dev->dev, buf->size,
1243                                   buf->vaddr, buf->paddr);
1244                 buf->vaddr = NULL;
1245                 buf->size = 0;
1246                 debugfs_remove(buf->dentry);
1247                 buf->dentry = NULL;
1248         }
1249 }
1250
1251 static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
1252 {
1253         struct coda_ctx *ctx = vb2_get_drv_priv(q);
1254         struct v4l2_device *v4l2_dev = &ctx->dev->v4l2_dev;
1255         struct coda_q_data *q_data_src, *q_data_dst;
1256         struct vb2_v4l2_buffer *buf;
1257         int ret = 0;
1258
1259         if (count < 1)
1260                 return -EINVAL;
1261
1262         q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
1263         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1264                 if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
1265                         /* copy the buffers that were queued before streamon */
1266                         mutex_lock(&ctx->bitstream_mutex);
1267                         coda_fill_bitstream(ctx, false);
1268                         mutex_unlock(&ctx->bitstream_mutex);
1269
1270                         if (coda_get_bitstream_payload(ctx) < 512) {
1271                                 ret = -EINVAL;
1272                                 goto err;
1273                         }
1274                 }
1275
1276                 ctx->streamon_out = 1;
1277         } else {
1278                 ctx->streamon_cap = 1;
1279         }
1280
1281         /* Don't start the coda unless both queues are on */
1282         if (!(ctx->streamon_out & ctx->streamon_cap))
1283                 return 0;
1284
1285         q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1286         if ((q_data_src->width != q_data_dst->width &&
1287              round_up(q_data_src->width, 16) != q_data_dst->width) ||
1288             (q_data_src->height != q_data_dst->height &&
1289              round_up(q_data_src->height, 16) != q_data_dst->height)) {
1290                 v4l2_err(v4l2_dev, "can't convert %dx%d to %dx%d\n",
1291                          q_data_src->width, q_data_src->height,
1292                          q_data_dst->width, q_data_dst->height);
1293                 ret = -EINVAL;
1294                 goto err;
1295         }
1296
1297         /* Allow BIT decoder device_run with no new buffers queued */
1298         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
1299                 v4l2_m2m_set_src_buffered(ctx->fh.m2m_ctx, true);
1300
1301         ctx->gopcounter = ctx->params.gop_size - 1;
1302
1303         ctx->codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
1304                                      q_data_dst->fourcc);
1305         if (!ctx->codec) {
1306                 v4l2_err(v4l2_dev, "couldn't tell instance type.\n");
1307                 ret = -EINVAL;
1308                 goto err;
1309         }
1310
1311         if (q_data_dst->fourcc == V4L2_PIX_FMT_JPEG)
1312                 ctx->params.gop_size = 1;
1313         ctx->gopcounter = ctx->params.gop_size - 1;
1314
1315         ret = ctx->ops->start_streaming(ctx);
1316         if (ctx->inst_type == CODA_INST_DECODER) {
1317                 if (ret == -EAGAIN)
1318                         return 0;
1319                 else if (ret < 0)
1320                         goto err;
1321         }
1322
1323         return ret;
1324
1325 err:
1326         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1327                 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1328                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
1329         } else {
1330                 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1331                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
1332         }
1333         return ret;
1334 }
1335
1336 static void coda_stop_streaming(struct vb2_queue *q)
1337 {
1338         struct coda_ctx *ctx = vb2_get_drv_priv(q);
1339         struct coda_dev *dev = ctx->dev;
1340         struct vb2_v4l2_buffer *buf;
1341         unsigned long flags;
1342         bool stop;
1343
1344         stop = ctx->streamon_out && ctx->streamon_cap;
1345
1346         if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1347                 v4l2_dbg(1, coda_debug, &dev->v4l2_dev,
1348                          "%s: output\n", __func__);
1349                 ctx->streamon_out = 0;
1350
1351                 coda_bit_stream_end_flag(ctx);
1352
1353                 ctx->qsequence = 0;
1354
1355                 while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
1356                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
1357         } else {
1358                 v4l2_dbg(1, coda_debug, &dev->v4l2_dev,
1359                          "%s: capture\n", __func__);
1360                 ctx->streamon_cap = 0;
1361
1362                 ctx->osequence = 0;
1363                 ctx->sequence_offset = 0;
1364
1365                 while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
1366                         v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
1367         }
1368
1369         if (stop) {
1370                 struct coda_buffer_meta *meta;
1371
1372                 if (ctx->ops->seq_end_work) {
1373                         queue_work(dev->workqueue, &ctx->seq_end_work);
1374                         flush_work(&ctx->seq_end_work);
1375                 }
1376                 spin_lock_irqsave(&ctx->buffer_meta_lock, flags);
1377                 while (!list_empty(&ctx->buffer_meta_list)) {
1378                         meta = list_first_entry(&ctx->buffer_meta_list,
1379                                                 struct coda_buffer_meta, list);
1380                         list_del(&meta->list);
1381                         kfree(meta);
1382                 }
1383                 ctx->num_metas = 0;
1384                 spin_unlock_irqrestore(&ctx->buffer_meta_lock, flags);
1385                 kfifo_init(&ctx->bitstream_fifo,
1386                         ctx->bitstream.vaddr, ctx->bitstream.size);
1387                 ctx->runcounter = 0;
1388                 ctx->aborting = 0;
1389         }
1390
1391         if (!ctx->streamon_out && !ctx->streamon_cap)
1392                 ctx->bit_stream_param &= ~CODA_BIT_STREAM_END_FLAG;
1393 }
1394
1395 static const struct vb2_ops coda_qops = {
1396         .queue_setup            = coda_queue_setup,
1397         .buf_prepare            = coda_buf_prepare,
1398         .buf_queue              = coda_buf_queue,
1399         .start_streaming        = coda_start_streaming,
1400         .stop_streaming         = coda_stop_streaming,
1401         .wait_prepare           = vb2_ops_wait_prepare,
1402         .wait_finish            = vb2_ops_wait_finish,
1403 };
1404
1405 static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
1406 {
1407         struct coda_ctx *ctx =
1408                         container_of(ctrl->handler, struct coda_ctx, ctrls);
1409
1410         v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1411                  "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);
1412
1413         switch (ctrl->id) {
1414         case V4L2_CID_HFLIP:
1415                 if (ctrl->val)
1416                         ctx->params.rot_mode |= CODA_MIR_HOR;
1417                 else
1418                         ctx->params.rot_mode &= ~CODA_MIR_HOR;
1419                 break;
1420         case V4L2_CID_VFLIP:
1421                 if (ctrl->val)
1422                         ctx->params.rot_mode |= CODA_MIR_VER;
1423                 else
1424                         ctx->params.rot_mode &= ~CODA_MIR_VER;
1425                 break;
1426         case V4L2_CID_MPEG_VIDEO_BITRATE:
1427                 ctx->params.bitrate = ctrl->val / 1000;
1428                 break;
1429         case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
1430                 ctx->params.gop_size = ctrl->val;
1431                 break;
1432         case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP:
1433                 ctx->params.h264_intra_qp = ctrl->val;
1434                 break;
1435         case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP:
1436                 ctx->params.h264_inter_qp = ctrl->val;
1437                 break;
1438         case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
1439                 ctx->params.h264_min_qp = ctrl->val;
1440                 break;
1441         case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:
1442                 ctx->params.h264_max_qp = ctrl->val;
1443                 break;
1444         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA:
1445                 ctx->params.h264_deblk_alpha = ctrl->val;
1446                 break;
1447         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA:
1448                 ctx->params.h264_deblk_beta = ctrl->val;
1449                 break;
1450         case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1451                 ctx->params.h264_deblk_enabled = (ctrl->val ==
1452                                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED);
1453                 break;
1454         case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:
1455                 ctx->params.mpeg4_intra_qp = ctrl->val;
1456                 break;
1457         case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP:
1458                 ctx->params.mpeg4_inter_qp = ctrl->val;
1459                 break;
1460         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1461                 ctx->params.slice_mode = ctrl->val;
1462                 break;
1463         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB:
1464                 ctx->params.slice_max_mb = ctrl->val;
1465                 break;
1466         case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES:
1467                 ctx->params.slice_max_bits = ctrl->val * 8;
1468                 break;
1469         case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1470                 break;
1471         case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:
1472                 ctx->params.intra_refresh = ctrl->val;
1473                 break;
1474         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
1475                 coda_set_jpeg_compression_quality(ctx, ctrl->val);
1476                 break;
1477         case V4L2_CID_JPEG_RESTART_INTERVAL:
1478                 ctx->params.jpeg_restart_interval = ctrl->val;
1479                 break;
1480         case V4L2_CID_MPEG_VIDEO_VBV_DELAY:
1481                 ctx->params.vbv_delay = ctrl->val;
1482                 break;
1483         case V4L2_CID_MPEG_VIDEO_VBV_SIZE:
1484                 ctx->params.vbv_size = min(ctrl->val * 8192, 0x7fffffff);
1485                 break;
1486         default:
1487                 v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
1488                         "Invalid control, id=%d, val=%d\n",
1489                         ctrl->id, ctrl->val);
1490                 return -EINVAL;
1491         }
1492
1493         return 0;
1494 }
1495
1496 static const struct v4l2_ctrl_ops coda_ctrl_ops = {
1497         .s_ctrl = coda_s_ctrl,
1498 };
1499
1500 static void coda_encode_ctrls(struct coda_ctx *ctx)
1501 {
1502         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1503                 V4L2_CID_MPEG_VIDEO_BITRATE, 0, 32767000, 1000, 0);
1504         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1505                 V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 60, 1, 16);
1506         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1507                 V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP, 0, 51, 1, 25);
1508         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1509                 V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP, 0, 51, 1, 25);
1510         if (ctx->dev->devtype->product != CODA_960) {
1511                 v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1512                         V4L2_CID_MPEG_VIDEO_H264_MIN_QP, 0, 51, 1, 12);
1513         }
1514         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1515                 V4L2_CID_MPEG_VIDEO_H264_MAX_QP, 0, 51, 1, 51);
1516         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1517                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA, 0, 15, 1, 0);
1518         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1519                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA, 0, 15, 1, 0);
1520         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1521                 V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE,
1522                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED, 0x0,
1523                 V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED);
1524         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1525                 V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP, 1, 31, 1, 2);
1526         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1527                 V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP, 1, 31, 1, 2);
1528         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1529                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE,
1530                 V4L2_MPEG_VIDEO_MULTI_SICE_MODE_MAX_BYTES, 0x0,
1531                 V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE);
1532         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1533                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB, 1, 0x3fffffff, 1, 1);
1534         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1535                 V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES, 1, 0x3fffffff, 1,
1536                 500);
1537         v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
1538                 V4L2_CID_MPEG_VIDEO_HEADER_MODE,
1539                 V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME,
1540                 (1 << V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE),
1541                 V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME);
1542         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1543                 V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB, 0,
1544                 1920 * 1088 / 256, 1, 0);
1545         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1546                 V4L2_CID_MPEG_VIDEO_VBV_DELAY, 0, 0x7fff, 1, 0);
1547         /*
1548          * The maximum VBV size value is 0x7fffffff bits,
1549          * one bit less than 262144 KiB
1550          */
1551         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1552                 V4L2_CID_MPEG_VIDEO_VBV_SIZE, 0, 262144, 1, 0);
1553 }
1554
1555 static void coda_jpeg_encode_ctrls(struct coda_ctx *ctx)
1556 {
1557         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1558                 V4L2_CID_JPEG_COMPRESSION_QUALITY, 5, 100, 1, 50);
1559         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1560                 V4L2_CID_JPEG_RESTART_INTERVAL, 0, 100, 1, 0);
1561 }
1562
1563 static int coda_ctrls_setup(struct coda_ctx *ctx)
1564 {
1565         v4l2_ctrl_handler_init(&ctx->ctrls, 2);
1566
1567         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1568                 V4L2_CID_HFLIP, 0, 1, 1, 0);
1569         v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
1570                 V4L2_CID_VFLIP, 0, 1, 1, 0);
1571         if (ctx->inst_type == CODA_INST_ENCODER) {
1572                 if (ctx->cvd->dst_formats[0] == V4L2_PIX_FMT_JPEG)
1573                         coda_jpeg_encode_ctrls(ctx);
1574                 else
1575                         coda_encode_ctrls(ctx);
1576         }
1577
1578         if (ctx->ctrls.error) {
1579                 v4l2_err(&ctx->dev->v4l2_dev,
1580                         "control initialization error (%d)",
1581                         ctx->ctrls.error);
1582                 return -EINVAL;
1583         }
1584
1585         return v4l2_ctrl_handler_setup(&ctx->ctrls);
1586 }
1587
1588 static int coda_queue_init(struct coda_ctx *ctx, struct vb2_queue *vq)
1589 {
1590         vq->drv_priv = ctx;
1591         vq->ops = &coda_qops;
1592         vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1593         vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1594         vq->lock = &ctx->dev->dev_mutex;
1595         /* One way to indicate end-of-stream for coda is to set the
1596          * bytesused == 0. However by default videobuf2 handles bytesused
1597          * equal to 0 as a special case and changes its value to the size
1598          * of the buffer. Set the allow_zero_bytesused flag, so
1599          * that videobuf2 will keep the value of bytesused intact.
1600          */
1601         vq->allow_zero_bytesused = 1;
1602
1603         return vb2_queue_init(vq);
1604 }
1605
1606 int coda_encoder_queue_init(void *priv, struct vb2_queue *src_vq,
1607                             struct vb2_queue *dst_vq)
1608 {
1609         int ret;
1610
1611         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1612         src_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1613         src_vq->mem_ops = &vb2_dma_contig_memops;
1614
1615         ret = coda_queue_init(priv, src_vq);
1616         if (ret)
1617                 return ret;
1618
1619         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1620         dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1621         dst_vq->mem_ops = &vb2_dma_contig_memops;
1622
1623         return coda_queue_init(priv, dst_vq);
1624 }
1625
1626 int coda_decoder_queue_init(void *priv, struct vb2_queue *src_vq,
1627                             struct vb2_queue *dst_vq)
1628 {
1629         int ret;
1630
1631         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1632         src_vq->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR;
1633         src_vq->mem_ops = &vb2_vmalloc_memops;
1634
1635         ret = coda_queue_init(priv, src_vq);
1636         if (ret)
1637                 return ret;
1638
1639         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1640         dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
1641         dst_vq->mem_ops = &vb2_dma_contig_memops;
1642
1643         return coda_queue_init(priv, dst_vq);
1644 }
1645
1646 static int coda_next_free_instance(struct coda_dev *dev)
1647 {
1648         int idx = ffz(dev->instance_mask);
1649
1650         if ((idx < 0) ||
1651             (dev->devtype->product == CODA_DX6 && idx > CODADX6_MAX_INSTANCES))
1652                 return -EBUSY;
1653
1654         return idx;
1655 }
1656
1657 /*
1658  * File operations
1659  */
1660
1661 static int coda_open(struct file *file)
1662 {
1663         struct video_device *vdev = video_devdata(file);
1664         struct coda_dev *dev = video_get_drvdata(vdev);
1665         struct coda_ctx *ctx = NULL;
1666         char *name;
1667         int ret;
1668         int idx;
1669
1670         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1671         if (!ctx)
1672                 return -ENOMEM;
1673
1674         idx = coda_next_free_instance(dev);
1675         if (idx < 0) {
1676                 ret = idx;
1677                 goto err_coda_max;
1678         }
1679         set_bit(idx, &dev->instance_mask);
1680
1681         name = kasprintf(GFP_KERNEL, "context%d", idx);
1682         if (!name) {
1683                 ret = -ENOMEM;
1684                 goto err_coda_name_init;
1685         }
1686
1687         ctx->debugfs_entry = debugfs_create_dir(name, dev->debugfs_root);
1688         kfree(name);
1689
1690         ctx->cvd = to_coda_video_device(vdev);
1691         ctx->inst_type = ctx->cvd->type;
1692         ctx->ops = ctx->cvd->ops;
1693         ctx->use_bit = !ctx->cvd->direct;
1694         init_completion(&ctx->completion);
1695         INIT_WORK(&ctx->pic_run_work, coda_pic_run_work);
1696         if (ctx->ops->seq_end_work)
1697                 INIT_WORK(&ctx->seq_end_work, ctx->ops->seq_end_work);
1698         v4l2_fh_init(&ctx->fh, video_devdata(file));
1699         file->private_data = &ctx->fh;
1700         v4l2_fh_add(&ctx->fh);
1701         ctx->dev = dev;
1702         ctx->idx = idx;
1703         switch (dev->devtype->product) {
1704         case CODA_960:
1705                 ctx->frame_mem_ctrl = 1 << 12;
1706                 /* fallthrough */
1707         case CODA_7541:
1708                 ctx->reg_idx = 0;
1709                 break;
1710         default:
1711                 ctx->reg_idx = idx;
1712         }
1713
1714         /* Power up and upload firmware if necessary */
1715         ret = pm_runtime_get_sync(&dev->plat_dev->dev);
1716         if (ret < 0) {
1717                 v4l2_err(&dev->v4l2_dev, "failed to power up: %d\n", ret);
1718                 goto err_pm_get;
1719         }
1720
1721         ret = clk_prepare_enable(dev->clk_per);
1722         if (ret)
1723                 goto err_clk_per;
1724
1725         ret = clk_prepare_enable(dev->clk_ahb);
1726         if (ret)
1727                 goto err_clk_ahb;
1728
1729         set_default_params(ctx);
1730         ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
1731                                             ctx->ops->queue_init);
1732         if (IS_ERR(ctx->fh.m2m_ctx)) {
1733                 ret = PTR_ERR(ctx->fh.m2m_ctx);
1734
1735                 v4l2_err(&dev->v4l2_dev, "%s return error (%d)\n",
1736                          __func__, ret);
1737                 goto err_ctx_init;
1738         }
1739
1740         ret = coda_ctrls_setup(ctx);
1741         if (ret) {
1742                 v4l2_err(&dev->v4l2_dev, "failed to setup coda controls\n");
1743                 goto err_ctrls_setup;
1744         }
1745
1746         ctx->fh.ctrl_handler = &ctx->ctrls;
1747
1748         mutex_init(&ctx->bitstream_mutex);
1749         mutex_init(&ctx->buffer_mutex);
1750         INIT_LIST_HEAD(&ctx->buffer_meta_list);
1751         spin_lock_init(&ctx->buffer_meta_lock);
1752
1753         coda_lock(ctx);
1754         list_add(&ctx->list, &dev->instances);
1755         coda_unlock(ctx);
1756
1757         v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Created instance %d (%p)\n",
1758                  ctx->idx, ctx);
1759
1760         return 0;
1761
1762 err_ctrls_setup:
1763         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1764 err_ctx_init:
1765         clk_disable_unprepare(dev->clk_ahb);
1766 err_clk_ahb:
1767         clk_disable_unprepare(dev->clk_per);
1768 err_clk_per:
1769         pm_runtime_put_sync(&dev->plat_dev->dev);
1770 err_pm_get:
1771         v4l2_fh_del(&ctx->fh);
1772         v4l2_fh_exit(&ctx->fh);
1773         clear_bit(ctx->idx, &dev->instance_mask);
1774 err_coda_name_init:
1775 err_coda_max:
1776         kfree(ctx);
1777         return ret;
1778 }
1779
1780 static int coda_release(struct file *file)
1781 {
1782         struct coda_dev *dev = video_drvdata(file);
1783         struct coda_ctx *ctx = fh_to_ctx(file->private_data);
1784
1785         v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Releasing instance %p\n",
1786                  ctx);
1787
1788         if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
1789                 coda_bit_stream_end_flag(ctx);
1790
1791         /* If this instance is running, call .job_abort and wait for it to end */
1792         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1793
1794         /* In case the instance was not running, we still need to call SEQ_END */
1795         if (ctx->ops->seq_end_work) {
1796                 queue_work(dev->workqueue, &ctx->seq_end_work);
1797                 flush_work(&ctx->seq_end_work);
1798         }
1799
1800         coda_lock(ctx);
1801         list_del(&ctx->list);
1802         coda_unlock(ctx);
1803
1804         if (ctx->dev->devtype->product == CODA_DX6)
1805                 coda_free_aux_buf(dev, &ctx->workbuf);
1806
1807         v4l2_ctrl_handler_free(&ctx->ctrls);
1808         clk_disable_unprepare(dev->clk_ahb);
1809         clk_disable_unprepare(dev->clk_per);
1810         pm_runtime_put_sync(&dev->plat_dev->dev);
1811         v4l2_fh_del(&ctx->fh);
1812         v4l2_fh_exit(&ctx->fh);
1813         clear_bit(ctx->idx, &dev->instance_mask);
1814         if (ctx->ops->release)
1815                 ctx->ops->release(ctx);
1816         debugfs_remove_recursive(ctx->debugfs_entry);
1817         kfree(ctx);
1818
1819         return 0;
1820 }
1821
1822 static const struct v4l2_file_operations coda_fops = {
1823         .owner          = THIS_MODULE,
1824         .open           = coda_open,
1825         .release        = coda_release,
1826         .poll           = v4l2_m2m_fop_poll,
1827         .unlocked_ioctl = video_ioctl2,
1828         .mmap           = v4l2_m2m_fop_mmap,
1829 };
1830
1831 static int coda_hw_init(struct coda_dev *dev)
1832 {
1833         u32 data;
1834         u16 *p;
1835         int i, ret;
1836
1837         ret = clk_prepare_enable(dev->clk_per);
1838         if (ret)
1839                 goto err_clk_per;
1840
1841         ret = clk_prepare_enable(dev->clk_ahb);
1842         if (ret)
1843                 goto err_clk_ahb;
1844
1845         if (dev->rstc)
1846                 reset_control_reset(dev->rstc);
1847
1848         /*
1849          * Copy the first CODA_ISRAM_SIZE in the internal SRAM.
1850          * The 16-bit chars in the code buffer are in memory access
1851          * order, re-sort them to CODA order for register download.
1852          * Data in this SRAM survives a reboot.
1853          */
1854         p = (u16 *)dev->codebuf.vaddr;
1855         if (dev->devtype->product == CODA_DX6) {
1856                 for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++)  {
1857                         data = CODA_DOWN_ADDRESS_SET(i) |
1858                                 CODA_DOWN_DATA_SET(p[i ^ 1]);
1859                         coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
1860                 }
1861         } else {
1862                 for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
1863                         data = CODA_DOWN_ADDRESS_SET(i) |
1864                                 CODA_DOWN_DATA_SET(p[round_down(i, 4) +
1865                                                         3 - (i % 4)]);
1866                         coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
1867                 }
1868         }
1869
1870         /* Clear registers */
1871         for (i = 0; i < 64; i++)
1872                 coda_write(dev, 0, CODA_REG_BIT_CODE_BUF_ADDR + i * 4);
1873
1874         /* Tell the BIT where to find everything it needs */
1875         if (dev->devtype->product == CODA_960 ||
1876             dev->devtype->product == CODA_7541) {
1877                 coda_write(dev, dev->tempbuf.paddr,
1878                                 CODA_REG_BIT_TEMP_BUF_ADDR);
1879                 coda_write(dev, 0, CODA_REG_BIT_BIT_STREAM_PARAM);
1880         } else {
1881                 coda_write(dev, dev->workbuf.paddr,
1882                               CODA_REG_BIT_WORK_BUF_ADDR);
1883         }
1884         coda_write(dev, dev->codebuf.paddr,
1885                       CODA_REG_BIT_CODE_BUF_ADDR);
1886         coda_write(dev, 0, CODA_REG_BIT_CODE_RUN);
1887
1888         /* Set default values */
1889         switch (dev->devtype->product) {
1890         case CODA_DX6:
1891                 coda_write(dev, CODADX6_STREAM_BUF_PIC_FLUSH,
1892                            CODA_REG_BIT_STREAM_CTRL);
1893                 break;
1894         default:
1895                 coda_write(dev, CODA7_STREAM_BUF_PIC_FLUSH,
1896                            CODA_REG_BIT_STREAM_CTRL);
1897         }
1898         if (dev->devtype->product == CODA_960)
1899                 coda_write(dev, 1 << 12, CODA_REG_BIT_FRAME_MEM_CTRL);
1900         else
1901                 coda_write(dev, 0, CODA_REG_BIT_FRAME_MEM_CTRL);
1902
1903         if (dev->devtype->product != CODA_DX6)
1904                 coda_write(dev, 0, CODA7_REG_BIT_AXI_SRAM_USE);
1905
1906         coda_write(dev, CODA_INT_INTERRUPT_ENABLE,
1907                       CODA_REG_BIT_INT_ENABLE);
1908
1909         /* Reset VPU and start processor */
1910         data = coda_read(dev, CODA_REG_BIT_CODE_RESET);
1911         data |= CODA_REG_RESET_ENABLE;
1912         coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
1913         udelay(10);
1914         data &= ~CODA_REG_RESET_ENABLE;
1915         coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
1916         coda_write(dev, CODA_REG_RUN_ENABLE, CODA_REG_BIT_CODE_RUN);
1917
1918         clk_disable_unprepare(dev->clk_ahb);
1919         clk_disable_unprepare(dev->clk_per);
1920
1921         return 0;
1922
1923 err_clk_ahb:
1924         clk_disable_unprepare(dev->clk_per);
1925 err_clk_per:
1926         return ret;
1927 }
1928
1929 static int coda_register_device(struct coda_dev *dev, int i)
1930 {
1931         struct video_device *vfd = &dev->vfd[i];
1932
1933         if (i >= dev->devtype->num_vdevs)
1934                 return -EINVAL;
1935
1936         strlcpy(vfd->name, dev->devtype->vdevs[i]->name, sizeof(vfd->name));
1937         vfd->fops       = &coda_fops;
1938         vfd->ioctl_ops  = &coda_ioctl_ops;
1939         vfd->release    = video_device_release_empty,
1940         vfd->lock       = &dev->dev_mutex;
1941         vfd->v4l2_dev   = &dev->v4l2_dev;
1942         vfd->vfl_dir    = VFL_DIR_M2M;
1943         video_set_drvdata(vfd, dev);
1944
1945         /* Not applicable, use the selection API instead */
1946         v4l2_disable_ioctl(vfd, VIDIOC_CROPCAP);
1947         v4l2_disable_ioctl(vfd, VIDIOC_G_CROP);
1948         v4l2_disable_ioctl(vfd, VIDIOC_S_CROP);
1949
1950         return video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1951 }
1952
1953 static void coda_fw_callback(const struct firmware *fw, void *context)
1954 {
1955         struct coda_dev *dev = context;
1956         struct platform_device *pdev = dev->plat_dev;
1957         int i, ret;
1958
1959         if (!fw) {
1960                 v4l2_err(&dev->v4l2_dev, "firmware request failed\n");
1961                 goto put_pm;
1962         }
1963
1964         /* allocate auxiliary per-device code buffer for the BIT processor */
1965         ret = coda_alloc_aux_buf(dev, &dev->codebuf, fw->size, "codebuf",
1966                                  dev->debugfs_root);
1967         if (ret < 0)
1968                 goto put_pm;
1969
1970         /* Copy the whole firmware image to the code buffer */
1971         memcpy(dev->codebuf.vaddr, fw->data, fw->size);
1972         release_firmware(fw);
1973
1974         ret = coda_hw_init(dev);
1975         if (ret < 0) {
1976                 v4l2_err(&dev->v4l2_dev, "HW initialization failed\n");
1977                 goto put_pm;
1978         }
1979
1980         ret = coda_check_firmware(dev);
1981         if (ret < 0)
1982                 goto put_pm;
1983
1984         dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1985         if (IS_ERR(dev->alloc_ctx)) {
1986                 v4l2_err(&dev->v4l2_dev, "Failed to alloc vb2 context\n");
1987                 goto put_pm;
1988         }
1989
1990         dev->m2m_dev = v4l2_m2m_init(&coda_m2m_ops);
1991         if (IS_ERR(dev->m2m_dev)) {
1992                 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1993                 goto rel_ctx;
1994         }
1995
1996         for (i = 0; i < dev->devtype->num_vdevs; i++) {
1997                 ret = coda_register_device(dev, i);
1998                 if (ret) {
1999                         v4l2_err(&dev->v4l2_dev,
2000                                  "Failed to register %s video device: %d\n",
2001                                  dev->devtype->vdevs[i]->name, ret);
2002                         goto rel_vfd;
2003                 }
2004         }
2005
2006         v4l2_info(&dev->v4l2_dev, "codec registered as /dev/video[%d-%d]\n",
2007                   dev->vfd[0].num, dev->vfd[i - 1].num);
2008
2009         pm_runtime_put_sync(&pdev->dev);
2010         return;
2011
2012 rel_vfd:
2013         while (--i >= 0)
2014                 video_unregister_device(&dev->vfd[i]);
2015         v4l2_m2m_release(dev->m2m_dev);
2016 rel_ctx:
2017         vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
2018 put_pm:
2019         pm_runtime_put_sync(&pdev->dev);
2020 }
2021
2022 static int coda_firmware_request(struct coda_dev *dev)
2023 {
2024         char *fw = dev->devtype->firmware;
2025
2026         dev_dbg(&dev->plat_dev->dev, "requesting firmware '%s' for %s\n", fw,
2027                 coda_product_name(dev->devtype->product));
2028
2029         return request_firmware_nowait(THIS_MODULE, true,
2030                 fw, &dev->plat_dev->dev, GFP_KERNEL, dev, coda_fw_callback);
2031 }
2032
2033 enum coda_platform {
2034         CODA_IMX27,
2035         CODA_IMX53,
2036         CODA_IMX6Q,
2037         CODA_IMX6DL,
2038 };
2039
2040 static const struct coda_devtype coda_devdata[] = {
2041         [CODA_IMX27] = {
2042                 .firmware     = "v4l-codadx6-imx27.bin",
2043                 .product      = CODA_DX6,
2044                 .codecs       = codadx6_codecs,
2045                 .num_codecs   = ARRAY_SIZE(codadx6_codecs),
2046                 .vdevs        = codadx6_video_devices,
2047                 .num_vdevs    = ARRAY_SIZE(codadx6_video_devices),
2048                 .workbuf_size = 288 * 1024 + FMO_SLICE_SAVE_BUF_SIZE * 8 * 1024,
2049                 .iram_size    = 0xb000,
2050         },
2051         [CODA_IMX53] = {
2052                 .firmware     = "v4l-coda7541-imx53.bin",
2053                 .product      = CODA_7541,
2054                 .codecs       = coda7_codecs,
2055                 .num_codecs   = ARRAY_SIZE(coda7_codecs),
2056                 .vdevs        = coda7_video_devices,
2057                 .num_vdevs    = ARRAY_SIZE(coda7_video_devices),
2058                 .workbuf_size = 128 * 1024,
2059                 .tempbuf_size = 304 * 1024,
2060                 .iram_size    = 0x14000,
2061         },
2062         [CODA_IMX6Q] = {
2063                 .firmware     = "v4l-coda960-imx6q.bin",
2064                 .product      = CODA_960,
2065                 .codecs       = coda9_codecs,
2066                 .num_codecs   = ARRAY_SIZE(coda9_codecs),
2067                 .vdevs        = coda9_video_devices,
2068                 .num_vdevs    = ARRAY_SIZE(coda9_video_devices),
2069                 .workbuf_size = 80 * 1024,
2070                 .tempbuf_size = 204 * 1024,
2071                 .iram_size    = 0x21000,
2072         },
2073         [CODA_IMX6DL] = {
2074                 .firmware     = "v4l-coda960-imx6dl.bin",
2075                 .product      = CODA_960,
2076                 .codecs       = coda9_codecs,
2077                 .num_codecs   = ARRAY_SIZE(coda9_codecs),
2078                 .vdevs        = coda9_video_devices,
2079                 .num_vdevs    = ARRAY_SIZE(coda9_video_devices),
2080                 .workbuf_size = 80 * 1024,
2081                 .tempbuf_size = 204 * 1024,
2082                 .iram_size    = 0x20000,
2083         },
2084 };
2085
2086 static struct platform_device_id coda_platform_ids[] = {
2087         { .name = "coda-imx27", .driver_data = CODA_IMX27 },
2088         { /* sentinel */ }
2089 };
2090 MODULE_DEVICE_TABLE(platform, coda_platform_ids);
2091
2092 #ifdef CONFIG_OF
2093 static const struct of_device_id coda_dt_ids[] = {
2094         { .compatible = "fsl,imx27-vpu", .data = &coda_devdata[CODA_IMX27] },
2095         { .compatible = "fsl,imx53-vpu", .data = &coda_devdata[CODA_IMX53] },
2096         { .compatible = "fsl,imx6q-vpu", .data = &coda_devdata[CODA_IMX6Q] },
2097         { .compatible = "fsl,imx6dl-vpu", .data = &coda_devdata[CODA_IMX6DL] },
2098         { /* sentinel */ }
2099 };
2100 MODULE_DEVICE_TABLE(of, coda_dt_ids);
2101 #endif
2102
2103 static int coda_probe(struct platform_device *pdev)
2104 {
2105         const struct of_device_id *of_id =
2106                         of_match_device(of_match_ptr(coda_dt_ids), &pdev->dev);
2107         const struct platform_device_id *pdev_id;
2108         struct coda_platform_data *pdata = pdev->dev.platform_data;
2109         struct device_node *np = pdev->dev.of_node;
2110         struct gen_pool *pool;
2111         struct coda_dev *dev;
2112         struct resource *res;
2113         int ret, irq;
2114
2115         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
2116         if (!dev)
2117                 return -ENOMEM;
2118
2119         pdev_id = of_id ? of_id->data : platform_get_device_id(pdev);
2120
2121         if (of_id) {
2122                 dev->devtype = of_id->data;
2123         } else if (pdev_id) {
2124                 dev->devtype = &coda_devdata[pdev_id->driver_data];
2125         } else {
2126                 ret = -EINVAL;
2127                 goto err_v4l2_register;
2128         }
2129
2130         spin_lock_init(&dev->irqlock);
2131         INIT_LIST_HEAD(&dev->instances);
2132
2133         dev->plat_dev = pdev;
2134         dev->clk_per = devm_clk_get(&pdev->dev, "per");
2135         if (IS_ERR(dev->clk_per)) {
2136                 dev_err(&pdev->dev, "Could not get per clock\n");
2137                 return PTR_ERR(dev->clk_per);
2138         }
2139
2140         dev->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
2141         if (IS_ERR(dev->clk_ahb)) {
2142                 dev_err(&pdev->dev, "Could not get ahb clock\n");
2143                 return PTR_ERR(dev->clk_ahb);
2144         }
2145
2146         /* Get  memory for physical registers */
2147         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2148         dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
2149         if (IS_ERR(dev->regs_base))
2150                 return PTR_ERR(dev->regs_base);
2151
2152         /* IRQ */
2153         irq = platform_get_irq_byname(pdev, "bit");
2154         if (irq < 0)
2155                 irq = platform_get_irq(pdev, 0);
2156         if (irq < 0) {
2157                 dev_err(&pdev->dev, "failed to get irq resource\n");
2158                 return irq;
2159         }
2160
2161         ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, coda_irq_handler,
2162                         IRQF_ONESHOT, dev_name(&pdev->dev), dev);
2163         if (ret < 0) {
2164                 dev_err(&pdev->dev, "failed to request irq: %d\n", ret);
2165                 return ret;
2166         }
2167
2168         dev->rstc = devm_reset_control_get_optional(&pdev->dev, NULL);
2169         if (IS_ERR(dev->rstc)) {
2170                 ret = PTR_ERR(dev->rstc);
2171                 if (ret == -ENOENT || ret == -ENOSYS) {
2172                         dev->rstc = NULL;
2173                 } else {
2174                         dev_err(&pdev->dev, "failed get reset control: %d\n",
2175                                 ret);
2176                         return ret;
2177                 }
2178         }
2179
2180         /* Get IRAM pool from device tree or platform data */
2181         pool = of_gen_pool_get(np, "iram", 0);
2182         if (!pool && pdata)
2183                 pool = gen_pool_get(pdata->iram_dev, NULL);
2184         if (!pool) {
2185                 dev_err(&pdev->dev, "iram pool not available\n");
2186                 return -ENOMEM;
2187         }
2188         dev->iram_pool = pool;
2189
2190         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
2191         if (ret)
2192                 return ret;
2193
2194         mutex_init(&dev->dev_mutex);
2195         mutex_init(&dev->coda_mutex);
2196
2197         dev->debugfs_root = debugfs_create_dir("coda", NULL);
2198         if (!dev->debugfs_root)
2199                 dev_warn(&pdev->dev, "failed to create debugfs root\n");
2200
2201         /* allocate auxiliary per-device buffers for the BIT processor */
2202         if (dev->devtype->product == CODA_DX6) {
2203                 ret = coda_alloc_aux_buf(dev, &dev->workbuf,
2204                                          dev->devtype->workbuf_size, "workbuf",
2205                                          dev->debugfs_root);
2206                 if (ret < 0)
2207                         goto err_v4l2_register;
2208         }
2209
2210         if (dev->devtype->tempbuf_size) {
2211                 ret = coda_alloc_aux_buf(dev, &dev->tempbuf,
2212                                          dev->devtype->tempbuf_size, "tempbuf",
2213                                          dev->debugfs_root);
2214                 if (ret < 0)
2215                         goto err_v4l2_register;
2216         }
2217
2218         dev->iram.size = dev->devtype->iram_size;
2219         dev->iram.vaddr = gen_pool_dma_alloc(dev->iram_pool, dev->iram.size,
2220                                              &dev->iram.paddr);
2221         if (!dev->iram.vaddr) {
2222                 dev_warn(&pdev->dev, "unable to alloc iram\n");
2223         } else {
2224                 memset(dev->iram.vaddr, 0, dev->iram.size);
2225                 dev->iram.blob.data = dev->iram.vaddr;
2226                 dev->iram.blob.size = dev->iram.size;
2227                 dev->iram.dentry = debugfs_create_blob("iram", 0644,
2228                                                        dev->debugfs_root,
2229                                                        &dev->iram.blob);
2230         }
2231
2232         dev->workqueue = alloc_workqueue("coda", WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
2233         if (!dev->workqueue) {
2234                 dev_err(&pdev->dev, "unable to alloc workqueue\n");
2235                 ret = -ENOMEM;
2236                 goto err_v4l2_register;
2237         }
2238
2239         platform_set_drvdata(pdev, dev);
2240
2241         /*
2242          * Start activated so we can directly call coda_hw_init in
2243          * coda_fw_callback regardless of whether CONFIG_PM is
2244          * enabled or whether the device is associated with a PM domain.
2245          */
2246         pm_runtime_get_noresume(&pdev->dev);
2247         pm_runtime_set_active(&pdev->dev);
2248         pm_runtime_enable(&pdev->dev);
2249
2250         return coda_firmware_request(dev);
2251
2252 err_v4l2_register:
2253         v4l2_device_unregister(&dev->v4l2_dev);
2254         return ret;
2255 }
2256
2257 static int coda_remove(struct platform_device *pdev)
2258 {
2259         struct coda_dev *dev = platform_get_drvdata(pdev);
2260         int i;
2261
2262         for (i = 0; i < ARRAY_SIZE(dev->vfd); i++) {
2263                 if (video_get_drvdata(&dev->vfd[i]))
2264                         video_unregister_device(&dev->vfd[i]);
2265         }
2266         if (dev->m2m_dev)
2267                 v4l2_m2m_release(dev->m2m_dev);
2268         pm_runtime_disable(&pdev->dev);
2269         if (dev->alloc_ctx)
2270                 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
2271         v4l2_device_unregister(&dev->v4l2_dev);
2272         destroy_workqueue(dev->workqueue);
2273         if (dev->iram.vaddr)
2274                 gen_pool_free(dev->iram_pool, (unsigned long)dev->iram.vaddr,
2275                               dev->iram.size);
2276         coda_free_aux_buf(dev, &dev->codebuf);
2277         coda_free_aux_buf(dev, &dev->tempbuf);
2278         coda_free_aux_buf(dev, &dev->workbuf);
2279         debugfs_remove_recursive(dev->debugfs_root);
2280         return 0;
2281 }
2282
2283 #ifdef CONFIG_PM
2284 static int coda_runtime_resume(struct device *dev)
2285 {
2286         struct coda_dev *cdev = dev_get_drvdata(dev);
2287         int ret = 0;
2288
2289         if (dev->pm_domain && cdev->codebuf.vaddr) {
2290                 ret = coda_hw_init(cdev);
2291                 if (ret)
2292                         v4l2_err(&cdev->v4l2_dev, "HW initialization failed\n");
2293         }
2294
2295         return ret;
2296 }
2297 #endif
2298
2299 static const struct dev_pm_ops coda_pm_ops = {
2300         SET_RUNTIME_PM_OPS(NULL, coda_runtime_resume, NULL)
2301 };
2302
2303 static struct platform_driver coda_driver = {
2304         .probe  = coda_probe,
2305         .remove = coda_remove,
2306         .driver = {
2307                 .name   = CODA_NAME,
2308                 .of_match_table = of_match_ptr(coda_dt_ids),
2309                 .pm     = &coda_pm_ops,
2310         },
2311         .id_table = coda_platform_ids,
2312 };
2313
2314 module_platform_driver(coda_driver);
2315
2316 MODULE_LICENSE("GPL");
2317 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>");
2318 MODULE_DESCRIPTION("Coda multi-standard codec V4L2 driver");