drivers/media/video/s5p-tv/mixer_video.c

   1 /*
   2  * Samsung TV Mixer driver
   3  *
   4  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
   5  *
   6  * Tomasz Stanislawski, <t.stanislaws@samsung.com>
   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
  10  * by the Free Software Foundation. either version 2 of the License,
  11  * or (at your option) any later version
  12  */
  13
  14 #include "mixer.h"
  15
  16 #include <media/v4l2-ioctl.h>
  17 #include <linux/videodev2.h>
  18 #include <linux/mm.h>
  19 #include <linux/module.h>
  20 #include <linux/version.h>
  21 #include <linux/timer.h>
  22 #include <media/videobuf2-dma-contig.h>
  23
  24 static int find_reg_callback(struct device *dev, void *p)
  25 {
  26         struct v4l2_subdev **sd = p;
  27
  28         *sd = dev_get_drvdata(dev);
  29         /* non-zero value stops iteration */
  30         return 1;
  31 }
  32
  33 static struct v4l2_subdev *find_and_register_subdev(
  34         struct mxr_device *mdev, char *module_name)
  35 {
  36         struct device_driver *drv;
  37         struct v4l2_subdev *sd = NULL;
  38         int ret;
  39
  40         /* TODO: add waiting until probe is finished */
  41         drv = driver_find(module_name, &platform_bus_type);
  42         if (!drv) {
  43                 mxr_warn(mdev, "module %s is missing\n", module_name);
  44                 return NULL;
  45         }
  46         /* driver refcnt is increased, it is safe to iterate over devices */
  47         ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
  48         /* ret == 0 means that find_reg_callback was never executed */
  49         if (sd == NULL) {
  50                 mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
  51                 goto done;
  52         }
  53         /* v4l2_device_register_subdev detects if sd is NULL */
  54         ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
  55         if (ret) {
  56                 mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
  57                 sd = NULL;
  58         }
  59
  60 done:
  61         put_driver(drv);
  62         return sd;
  63 }
  64
  65 int __devinit mxr_acquire_video(struct mxr_device *mdev,
  66         struct mxr_output_conf *output_conf, int output_count)
  67 {
  68         struct device *dev = mdev->dev;
  69         struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
  70         int i;
  71         int ret = 0;
  72         struct v4l2_subdev *sd;
  73
  74         strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
  75         /* prepare context for V4L2 device */
  76         ret = v4l2_device_register(dev, v4l2_dev);
  77         if (ret) {
  78                 mxr_err(mdev, "could not register v4l2 device.\n");
  79                 goto fail;
  80         }
  81
  82         mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
  83         if (IS_ERR_OR_NULL(mdev->alloc_ctx)) {
  84                 mxr_err(mdev, "could not acquire vb2 allocator\n");
  85                 goto fail_v4l2_dev;
  86         }
  87
  88         /* registering outputs */
  89         mdev->output_cnt = 0;
  90         for (i = 0; i < output_count; ++i) {
  91                 struct mxr_output_conf *conf = &output_conf[i];
  92                 struct mxr_output *out;
  93
  94                 sd = find_and_register_subdev(mdev, conf->module_name);
  95                 /* trying to register next output */
  96                 if (sd == NULL)
  97                         continue;
  98                 out = kzalloc(sizeof *out, GFP_KERNEL);
  99                 if (out == NULL) {
 100                         mxr_err(mdev, "no memory for '%s'\n",
 101                                 conf->output_name);
 102                         ret = -ENOMEM;
 103                         /* registered subdevs are removed in fail_v4l2_dev */
 104                         goto fail_output;
 105                 }
 106                 strlcpy(out->name, conf->output_name, sizeof(out->name));
 107                 out->sd = sd;
 108                 out->cookie = conf->cookie;
 109                 mdev->output[mdev->output_cnt++] = out;
 110                 mxr_info(mdev, "added output '%s' from module '%s'\n",
 111                         conf->output_name, conf->module_name);
 112                 /* checking if maximal number of outputs is reached */
 113                 if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
 114                         break;
 115         }
 116
 117         if (mdev->output_cnt == 0) {
 118                 mxr_err(mdev, "failed to register any output\n");
 119                 ret = -ENODEV;
 120                 /* skipping fail_output because there is nothing to free */
 121                 goto fail_vb2_allocator;
 122         }
 123
 124         return 0;
 125
 126 fail_output:
 127         /* kfree is NULL-safe */
 128         for (i = 0; i < mdev->output_cnt; ++i)
 129                 kfree(mdev->output[i]);
 130         memset(mdev->output, 0, sizeof mdev->output);
 131
 132 fail_vb2_allocator:
 133         /* freeing allocator context */
 134         vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
 135
 136 fail_v4l2_dev:
 137         /* NOTE: automatically unregister all subdevs */
 138         v4l2_device_unregister(v4l2_dev);
 139
 140 fail:
 141         return ret;
 142 }
 143
 144 void __devexit mxr_release_video(struct mxr_device *mdev)
 145 {
 146         int i;
 147
 148         /* kfree is NULL-safe */
 149         for (i = 0; i < mdev->output_cnt; ++i)
 150                 kfree(mdev->output[i]);
 151
 152         vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
 153         v4l2_device_unregister(&mdev->v4l2_dev);
 154 }
 155
 156 static int mxr_querycap(struct file *file, void *priv,
 157         struct v4l2_capability *cap)
 158 {
 159         struct mxr_layer *layer = video_drvdata(file);
 160
 161         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 162
 163         strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof cap->driver);
 164         strlcpy(cap->card, layer->vfd.name, sizeof cap->card);
 165         sprintf(cap->bus_info, "%d", layer->idx);
 166         cap->version = KERNEL_VERSION(0, 1, 0);
 167         cap->capabilities = V4L2_CAP_STREAMING |
 168                 V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 169
 170         return 0;
 171 }
 172
 173 static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
 174 {
 175         mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
 176                 geo->src.full_width, geo->src.full_height);
 177         mxr_dbg(mdev, "src.size = (%u, %u)\n",
 178                 geo->src.width, geo->src.height);
 179         mxr_dbg(mdev, "src.offset = (%u, %u)\n",
 180                 geo->src.x_offset, geo->src.y_offset);
 181         mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
 182                 geo->dst.full_width, geo->dst.full_height);
 183         mxr_dbg(mdev, "dst.size = (%u, %u)\n",
 184                 geo->dst.width, geo->dst.height);
 185         mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
 186                 geo->dst.x_offset, geo->dst.y_offset);
 187         mxr_dbg(mdev, "ratio = (%u, %u)\n",
 188                 geo->x_ratio, geo->y_ratio);
 189 }
 190
 191 static void mxr_layer_default_geo(struct mxr_layer *layer)
 192 {
 193         struct mxr_device *mdev = layer->mdev;
 194         struct v4l2_mbus_framefmt mbus_fmt;
 195
 196         memset(&layer->geo, 0, sizeof layer->geo);
 197
 198         mxr_get_mbus_fmt(mdev, &mbus_fmt);
 199
 200         layer->geo.dst.full_width = mbus_fmt.width;
 201         layer->geo.dst.full_height = mbus_fmt.height;
 202         layer->geo.dst.width = layer->geo.dst.full_width;
 203         layer->geo.dst.height = layer->geo.dst.full_height;
 204         layer->geo.dst.field = mbus_fmt.field;
 205
 206         layer->geo.src.full_width = mbus_fmt.width;
 207         layer->geo.src.full_height = mbus_fmt.height;
 208         layer->geo.src.width = layer->geo.src.full_width;
 209         layer->geo.src.height = layer->geo.src.full_height;
 210
 211         mxr_geometry_dump(mdev, &layer->geo);
 212         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
 213         mxr_geometry_dump(mdev, &layer->geo);
 214 }
 215
 216 static void mxr_layer_update_output(struct mxr_layer *layer)
 217 {
 218         struct mxr_device *mdev = layer->mdev;
 219         struct v4l2_mbus_framefmt mbus_fmt;
 220
 221         mxr_get_mbus_fmt(mdev, &mbus_fmt);
 222         /* checking if update is needed */
 223         if (layer->geo.dst.full_width == mbus_fmt.width &&
 224                 layer->geo.dst.full_height == mbus_fmt.width)
 225                 return;
 226
 227         layer->geo.dst.full_width = mbus_fmt.width;
 228         layer->geo.dst.full_height = mbus_fmt.height;
 229         layer->geo.dst.field = mbus_fmt.field;
 230         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
 231
 232         mxr_geometry_dump(mdev, &layer->geo);
 233 }
 234
 235 static const struct mxr_format *find_format_by_fourcc(
 236         struct mxr_layer *layer, unsigned long fourcc);
 237 static const struct mxr_format *find_format_by_index(
 238         struct mxr_layer *layer, unsigned long index);
 239
 240 static int mxr_enum_fmt(struct file *file, void  *priv,
 241         struct v4l2_fmtdesc *f)
 242 {
 243         struct mxr_layer *layer = video_drvdata(file);
 244         struct mxr_device *mdev = layer->mdev;
 245         const struct mxr_format *fmt;
 246
 247         mxr_dbg(mdev, "%s\n", __func__);
 248         fmt = find_format_by_index(layer, f->index);
 249         if (fmt == NULL)
 250                 return -EINVAL;
 251
 252         strlcpy(f->description, fmt->name, sizeof(f->description));
 253         f->pixelformat = fmt->fourcc;
 254
 255         return 0;
 256 }
 257
 258 static unsigned int divup(unsigned int divident, unsigned int divisor)
 259 {
 260         return (divident + divisor - 1) / divisor;
 261 }
 262
 263 unsigned long mxr_get_plane_size(const struct mxr_block *blk,
 264         unsigned int width, unsigned int height)
 265 {
 266         unsigned int bl_width = divup(width, blk->width);
 267         unsigned int bl_height = divup(height, blk->height);
 268
 269         return bl_width * bl_height * blk->size;
 270 }
 271
 272 static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
 273         const struct mxr_format *fmt, u32 width, u32 height)
 274 {
 275         int i;
 276
 277         /* checking if nothing to fill */
 278         if (!planes)
 279                 return;
 280
 281         memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
 282         for (i = 0; i < fmt->num_planes; ++i) {
 283                 struct v4l2_plane_pix_format *plane = planes
 284                         + fmt->plane2subframe[i];
 285                 const struct mxr_block *blk = &fmt->plane[i];
 286                 u32 bl_width = divup(width, blk->width);
 287                 u32 bl_height = divup(height, blk->height);
 288                 u32 sizeimage = bl_width * bl_height * blk->size;
 289                 u16 bytesperline = bl_width * blk->size / blk->height;
 290
 291                 plane->sizeimage += sizeimage;
 292                 plane->bytesperline = max(plane->bytesperline, bytesperline);
 293         }
 294 }
 295
 296 static int mxr_g_fmt(struct file *file, void *priv,
 297                              struct v4l2_format *f)
 298 {
 299         struct mxr_layer *layer = video_drvdata(file);
 300         struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 301
 302         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 303
 304         pix->width = layer->geo.src.full_width;
 305         pix->height = layer->geo.src.full_height;
 306         pix->field = V4L2_FIELD_NONE;
 307         pix->pixelformat = layer->fmt->fourcc;
 308         pix->colorspace = layer->fmt->colorspace;
 309         mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
 310
 311         return 0;
 312 }
 313
 314 static int mxr_s_fmt(struct file *file, void *priv,
 315         struct v4l2_format *f)
 316 {
 317         struct mxr_layer *layer = video_drvdata(file);
 318         const struct mxr_format *fmt;
 319         struct v4l2_pix_format_mplane *pix;
 320         struct mxr_device *mdev = layer->mdev;
 321         struct mxr_geometry *geo = &layer->geo;
 322
 323         mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
 324
 325         pix = &f->fmt.pix_mp;
 326         fmt = find_format_by_fourcc(layer, pix->pixelformat);
 327         if (fmt == NULL) {
 328                 mxr_warn(mdev, "not recognized fourcc: %08x\n",
 329                         pix->pixelformat);
 330                 return -EINVAL;
 331         }
 332         layer->fmt = fmt;
 333         /* set source size to highest accepted value */
 334         geo->src.full_width = max(geo->dst.full_width, pix->width);
 335         geo->src.full_height = max(geo->dst.full_height, pix->height);
 336         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
 337         mxr_geometry_dump(mdev, &layer->geo);
 338         /* set cropping to total visible screen */
 339         geo->src.width = pix->width;
 340         geo->src.height = pix->height;
 341         geo->src.x_offset = 0;
 342         geo->src.y_offset = 0;
 343         /* assure consistency of geometry */
 344         layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
 345         mxr_geometry_dump(mdev, &layer->geo);
 346         /* set full size to lowest possible value */
 347         geo->src.full_width = 0;
 348         geo->src.full_height = 0;
 349         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
 350         mxr_geometry_dump(mdev, &layer->geo);
 351
 352         /* returning results */
 353         mxr_g_fmt(file, priv, f);
 354
 355         return 0;
 356 }
 357
 358 static int mxr_g_selection(struct file *file, void *fh,
 359         struct v4l2_selection *s)
 360 {
 361         struct mxr_layer *layer = video_drvdata(file);
 362         struct mxr_geometry *geo = &layer->geo;
 363
 364         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 365
 366         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
 367                 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 368                 return -EINVAL;
 369
 370         switch (s->target) {
 371         case V4L2_SEL_TGT_CROP_ACTIVE:
 372                 s->r.left = geo->src.x_offset;
 373                 s->r.top = geo->src.y_offset;
 374                 s->r.width = geo->src.width;
 375                 s->r.height = geo->src.height;
 376                 break;
 377         case V4L2_SEL_TGT_CROP_DEFAULT:
 378         case V4L2_SEL_TGT_CROP_BOUNDS:
 379                 s->r.left = 0;
 380                 s->r.top = 0;
 381                 s->r.width = geo->src.full_width;
 382                 s->r.height = geo->src.full_height;
 383                 break;
 384         case V4L2_SEL_TGT_COMPOSE_ACTIVE:
 385         case V4L2_SEL_TGT_COMPOSE_PADDED:
 386                 s->r.left = geo->dst.x_offset;
 387                 s->r.top = geo->dst.y_offset;
 388                 s->r.width = geo->dst.width;
 389                 s->r.height = geo->dst.height;
 390                 break;
 391         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 392         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 393                 s->r.left = 0;
 394                 s->r.top = 0;
 395                 s->r.width = geo->dst.full_width;
 396                 s->r.height = geo->dst.full_height;
 397                 break;
 398         default:
 399                 return -EINVAL;
 400         }
 401
 402         return 0;
 403 }
 404
 405 /* returns 1 if rectangle 'a' is inside 'b' */
 406 static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
 407 {
 408         if (a->left < b->left)
 409                 return 0;
 410         if (a->top < b->top)
 411                 return 0;
 412         if (a->left + a->width > b->left + b->width)
 413                 return 0;
 414         if (a->top + a->height > b->top + b->height)
 415                 return 0;
 416         return 1;
 417 }
 418
 419 static int mxr_s_selection(struct file *file, void *fh,
 420         struct v4l2_selection *s)
 421 {
 422         struct mxr_layer *layer = video_drvdata(file);
 423         struct mxr_geometry *geo = &layer->geo;
 424         struct mxr_crop *target = NULL;
 425         enum mxr_geometry_stage stage;
 426         struct mxr_geometry tmp;
 427         struct v4l2_rect res;
 428
 429         memset(&res, 0, sizeof res);
 430
 431         mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
 432                 s->r.width, s->r.height, s->r.left, s->r.top);
 433
 434         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
 435                 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 436                 return -EINVAL;
 437
 438         switch (s->target) {
 439         /* ignore read-only targets */
 440         case V4L2_SEL_TGT_CROP_DEFAULT:
 441         case V4L2_SEL_TGT_CROP_BOUNDS:
 442                 res.width = geo->src.full_width;
 443                 res.height = geo->src.full_height;
 444                 break;
 445
 446         /* ignore read-only targets */
 447         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 448         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 449                 res.width = geo->dst.full_width;
 450                 res.height = geo->dst.full_height;
 451                 break;
 452
 453         case V4L2_SEL_TGT_CROP_ACTIVE:
 454                 target = &geo->src;
 455                 stage = MXR_GEOMETRY_CROP;
 456                 break;
 457         case V4L2_SEL_TGT_COMPOSE_ACTIVE:
 458         case V4L2_SEL_TGT_COMPOSE_PADDED:
 459                 target = &geo->dst;
 460                 stage = MXR_GEOMETRY_COMPOSE;
 461                 break;
 462         default:
 463                 return -EINVAL;
 464         }
 465         /* apply change and update geometry if needed */
 466         if (target) {
 467                 /* backup current geometry if setup fails */
 468                 memcpy(&tmp, geo, sizeof tmp);
 469
 470                 /* apply requested selection */
 471                 target->x_offset = s->r.left;
 472                 target->y_offset = s->r.top;
 473                 target->width = s->r.width;
 474                 target->height = s->r.height;
 475
 476                 layer->ops.fix_geometry(layer, stage, s->flags);
 477
 478                 /* retrieve update selection rectangle */
 479                 res.left = target->x_offset;
 480                 res.top = target->y_offset;
 481                 res.width = target->width;
 482                 res.height = target->height;
 483
 484                 mxr_geometry_dump(layer->mdev, &layer->geo);
 485         }
 486
 487         /* checking if the rectangle satisfies constraints */
 488         if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
 489                 goto fail;
 490         if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
 491                 goto fail;
 492
 493         /* return result rectangle */
 494         s->r = res;
 495
 496         return 0;
 497 fail:
 498         /* restore old geometry, which is not touched if target is NULL */
 499         if (target)
 500                 memcpy(geo, &tmp, sizeof tmp);
 501         return -ERANGE;
 502 }
 503
 504 static int mxr_enum_dv_presets(struct file *file, void *fh,
 505         struct v4l2_dv_enum_preset *preset)
 506 {
 507         struct mxr_layer *layer = video_drvdata(file);
 508         struct mxr_device *mdev = layer->mdev;
 509         int ret;
 510
 511         /* lock protects from changing sd_out */
 512         mutex_lock(&mdev->mutex);
 513         ret = v4l2_subdev_call(to_outsd(mdev), video, enum_dv_presets, preset);
 514         mutex_unlock(&mdev->mutex);
 515
 516         return ret ? -EINVAL : 0;
 517 }
 518
 519 static int mxr_s_dv_preset(struct file *file, void *fh,
 520         struct v4l2_dv_preset *preset)
 521 {
 522         struct mxr_layer *layer = video_drvdata(file);
 523         struct mxr_device *mdev = layer->mdev;
 524         int ret;
 525
 526         /* lock protects from changing sd_out */
 527         mutex_lock(&mdev->mutex);
 528
 529         /* preset change cannot be done while there is an entity
 530          * dependant on output configuration
 531          */
 532         if (mdev->n_output > 0) {
 533                 mutex_unlock(&mdev->mutex);
 534                 return -EBUSY;
 535         }
 536
 537         ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_preset, preset);
 538
 539         mutex_unlock(&mdev->mutex);
 540
 541         mxr_layer_update_output(layer);
 542
 543         /* any failure should return EINVAL according to V4L2 doc */
 544         return ret ? -EINVAL : 0;
 545 }
 546
 547 static int mxr_g_dv_preset(struct file *file, void *fh,
 548         struct v4l2_dv_preset *preset)
 549 {
 550         struct mxr_layer *layer = video_drvdata(file);
 551         struct mxr_device *mdev = layer->mdev;
 552         int ret;
 553
 554         /* lock protects from changing sd_out */
 555         mutex_lock(&mdev->mutex);
 556         ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_preset, preset);
 557         mutex_unlock(&mdev->mutex);
 558
 559         return ret ? -EINVAL : 0;
 560 }
 561
 562 static int mxr_s_std(struct file *file, void *fh, v4l2_std_id *norm)
 563 {
 564         struct mxr_layer *layer = video_drvdata(file);
 565         struct mxr_device *mdev = layer->mdev;
 566         int ret;
 567
 568         /* lock protects from changing sd_out */
 569         mutex_lock(&mdev->mutex);
 570
 571         /* standard change cannot be done while there is an entity
 572          * dependant on output configuration
 573          */
 574         if (mdev->n_output > 0) {
 575                 mutex_unlock(&mdev->mutex);
 576                 return -EBUSY;
 577         }
 578
 579         ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, *norm);
 580
 581         mutex_unlock(&mdev->mutex);
 582
 583         mxr_layer_update_output(layer);
 584
 585         return ret ? -EINVAL : 0;
 586 }
 587
 588 static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 589 {
 590         struct mxr_layer *layer = video_drvdata(file);
 591         struct mxr_device *mdev = layer->mdev;
 592         int ret;
 593
 594         /* lock protects from changing sd_out */
 595         mutex_lock(&mdev->mutex);
 596         ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
 597         mutex_unlock(&mdev->mutex);
 598
 599         return ret ? -EINVAL : 0;
 600 }
 601
 602 static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
 603 {
 604         struct mxr_layer *layer = video_drvdata(file);
 605         struct mxr_device *mdev = layer->mdev;
 606         struct mxr_output *out;
 607         struct v4l2_subdev *sd;
 608
 609         if (a->index >= mdev->output_cnt)
 610                 return -EINVAL;
 611         out = mdev->output[a->index];
 612         BUG_ON(out == NULL);
 613         sd = out->sd;
 614         strlcpy(a->name, out->name, sizeof(a->name));
 615
 616         /* try to obtain supported tv norms */
 617         v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
 618         a->capabilities = 0;
 619         if (sd->ops->video && sd->ops->video->s_dv_preset)
 620                 a->capabilities |= V4L2_OUT_CAP_PRESETS;
 621         if (sd->ops->video && sd->ops->video->s_std_output)
 622                 a->capabilities |= V4L2_OUT_CAP_STD;
 623         a->type = V4L2_OUTPUT_TYPE_ANALOG;
 624
 625         return 0;
 626 }
 627
 628 static int mxr_s_output(struct file *file, void *fh, unsigned int i)
 629 {
 630         struct video_device *vfd = video_devdata(file);
 631         struct mxr_layer *layer = video_drvdata(file);
 632         struct mxr_device *mdev = layer->mdev;
 633
 634         if (i >= mdev->output_cnt || mdev->output[i] == NULL)
 635                 return -EINVAL;
 636
 637         mutex_lock(&mdev->mutex);
 638         if (mdev->n_output > 0) {
 639                 mutex_unlock(&mdev->mutex);
 640                 return -EBUSY;
 641         }
 642         mdev->current_output = i;
 643         vfd->tvnorms = 0;
 644         v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
 645                 &vfd->tvnorms);
 646         mutex_unlock(&mdev->mutex);
 647
 648         /* update layers geometry */
 649         mxr_layer_update_output(layer);
 650
 651         mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
 652
 653         return 0;
 654 }
 655
 656 static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
 657 {
 658         struct mxr_layer *layer = video_drvdata(file);
 659         struct mxr_device *mdev = layer->mdev;
 660
 661         mutex_lock(&mdev->mutex);
 662         *p = mdev->current_output;
 663         mutex_unlock(&mdev->mutex);
 664
 665         return 0;
 666 }
 667
 668 static int mxr_reqbufs(struct file *file, void *priv,
 669                           struct v4l2_requestbuffers *p)
 670 {
 671         struct mxr_layer *layer = video_drvdata(file);
 672
 673         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 674         return vb2_reqbufs(&layer->vb_queue, p);
 675 }
 676
 677 static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
 678 {
 679         struct mxr_layer *layer = video_drvdata(file);
 680
 681         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 682         return vb2_querybuf(&layer->vb_queue, p);
 683 }
 684
 685 static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 686 {
 687         struct mxr_layer *layer = video_drvdata(file);
 688
 689         mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
 690         return vb2_qbuf(&layer->vb_queue, p);
 691 }
 692
 693 static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 694 {
 695         struct mxr_layer *layer = video_drvdata(file);
 696
 697         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 698         return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
 699 }
 700
 701 static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 702 {
 703         struct mxr_layer *layer = video_drvdata(file);
 704
 705         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 706         return vb2_streamon(&layer->vb_queue, i);
 707 }
 708
 709 static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 710 {
 711         struct mxr_layer *layer = video_drvdata(file);
 712
 713         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 714         return vb2_streamoff(&layer->vb_queue, i);
 715 }
 716
 717 static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
 718         .vidioc_querycap = mxr_querycap,
 719         /* format handling */
 720         .vidioc_enum_fmt_vid_out = mxr_enum_fmt,
 721         .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
 722         .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
 723         /* buffer control */
 724         .vidioc_reqbufs = mxr_reqbufs,
 725         .vidioc_querybuf = mxr_querybuf,
 726         .vidioc_qbuf = mxr_qbuf,
 727         .vidioc_dqbuf = mxr_dqbuf,
 728         /* Streaming control */
 729         .vidioc_streamon = mxr_streamon,
 730         .vidioc_streamoff = mxr_streamoff,
 731         /* Preset functions */
 732         .vidioc_enum_dv_presets = mxr_enum_dv_presets,
 733         .vidioc_s_dv_preset = mxr_s_dv_preset,
 734         .vidioc_g_dv_preset = mxr_g_dv_preset,
 735         /* analog TV standard functions */
 736         .vidioc_s_std = mxr_s_std,
 737         .vidioc_g_std = mxr_g_std,
 738         /* Output handling */
 739         .vidioc_enum_output = mxr_enum_output,
 740         .vidioc_s_output = mxr_s_output,
 741         .vidioc_g_output = mxr_g_output,
 742         /* selection ioctls */
 743         .vidioc_g_selection = mxr_g_selection,
 744         .vidioc_s_selection = mxr_s_selection,
 745 };
 746
 747 static int mxr_video_open(struct file *file)
 748 {
 749         struct mxr_layer *layer = video_drvdata(file);
 750         struct mxr_device *mdev = layer->mdev;
 751         int ret = 0;
 752
 753         mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
 754         /* assure device probe is finished */
 755         wait_for_device_probe();
 756         /* creating context for file descriptor */
 757         ret = v4l2_fh_open(file);
 758         if (ret) {
 759                 mxr_err(mdev, "v4l2_fh_open failed\n");
 760                 return ret;
 761         }
 762
 763         /* leaving if layer is already initialized */
 764         if (!v4l2_fh_is_singular_file(file))
 765                 return 0;
 766
 767         /* FIXME: should power be enabled on open? */
 768         ret = mxr_power_get(mdev);
 769         if (ret) {
 770                 mxr_err(mdev, "power on failed\n");
 771                 goto fail_fh_open;
 772         }
 773
 774         ret = vb2_queue_init(&layer->vb_queue);
 775         if (ret != 0) {
 776                 mxr_err(mdev, "failed to initialize vb2 queue\n");
 777                 goto fail_power;
 778         }
 779         /* set default format, first on the list */
 780         layer->fmt = layer->fmt_array[0];
 781         /* setup default geometry */
 782         mxr_layer_default_geo(layer);
 783
 784         return 0;
 785
 786 fail_power:
 787         mxr_power_put(mdev);
 788
 789 fail_fh_open:
 790         v4l2_fh_release(file);
 791
 792         return ret;
 793 }
 794
 795 static unsigned int
 796 mxr_video_poll(struct file *file, struct poll_table_struct *wait)
 797 {
 798         struct mxr_layer *layer = video_drvdata(file);
 799
 800         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 801
 802         return vb2_poll(&layer->vb_queue, file, wait);
 803 }
 804
 805 static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
 806 {
 807         struct mxr_layer *layer = video_drvdata(file);
 808
 809         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 810
 811         return vb2_mmap(&layer->vb_queue, vma);
 812 }
 813
 814 static int mxr_video_release(struct file *file)
 815 {
 816         struct mxr_layer *layer = video_drvdata(file);
 817
 818         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 819         if (v4l2_fh_is_singular_file(file)) {
 820                 vb2_queue_release(&layer->vb_queue);
 821                 mxr_power_put(layer->mdev);
 822         }
 823         v4l2_fh_release(file);
 824         return 0;
 825 }
 826
 827 static const struct v4l2_file_operations mxr_fops = {
 828         .owner = THIS_MODULE,
 829         .open = mxr_video_open,
 830         .poll = mxr_video_poll,
 831         .mmap = mxr_video_mmap,
 832         .release = mxr_video_release,
 833         .unlocked_ioctl = video_ioctl2,
 834 };
 835
 836 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
 837         unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
 838         void *alloc_ctxs[])
 839 {
 840         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 841         const struct mxr_format *fmt = layer->fmt;
 842         int i;
 843         struct mxr_device *mdev = layer->mdev;
 844         struct v4l2_plane_pix_format planes[3];
 845
 846         mxr_dbg(mdev, "%s\n", __func__);
 847         /* checking if format was configured */
 848         if (fmt == NULL)
 849                 return -EINVAL;
 850         mxr_dbg(mdev, "fmt = %s\n", fmt->name);
 851         mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
 852                 layer->geo.src.full_height);
 853
 854         *nplanes = fmt->num_subframes;
 855         for (i = 0; i < fmt->num_subframes; ++i) {
 856                 alloc_ctxs[i] = layer->mdev->alloc_ctx;
 857                 sizes[i] = PAGE_ALIGN(planes[i].sizeimage);
 858                 mxr_dbg(mdev, "size[%d] = %08lx\n", i, sizes[i]);
 859         }
 860
 861         if (*nbuffers == 0)
 862                 *nbuffers = 1;
 863
 864         return 0;
 865 }
 866
 867 static void buf_queue(struct vb2_buffer *vb)
 868 {
 869         struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
 870         struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
 871         struct mxr_device *mdev = layer->mdev;
 872         unsigned long flags;
 873
 874         spin_lock_irqsave(&layer->enq_slock, flags);
 875         list_add_tail(&buffer->list, &layer->enq_list);
 876         spin_unlock_irqrestore(&layer->enq_slock, flags);
 877
 878         mxr_dbg(mdev, "queuing buffer\n");
 879 }
 880
 881 static void wait_lock(struct vb2_queue *vq)
 882 {
 883         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 884
 885         mxr_dbg(layer->mdev, "%s\n", __func__);
 886         mutex_lock(&layer->mutex);
 887 }
 888
 889 static void wait_unlock(struct vb2_queue *vq)
 890 {
 891         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 892
 893         mxr_dbg(layer->mdev, "%s\n", __func__);
 894         mutex_unlock(&layer->mutex);
 895 }
 896
 897 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 898 {
 899         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 900         struct mxr_device *mdev = layer->mdev;
 901         unsigned long flags;
 902
 903         mxr_dbg(mdev, "%s\n", __func__);
 904
 905         if (count == 0) {
 906                 mxr_dbg(mdev, "no output buffers queued\n");
 907                 return -EINVAL;
 908         }
 909
 910         /* block any changes in output configuration */
 911         mxr_output_get(mdev);
 912
 913         mxr_layer_update_output(layer);
 914         layer->ops.format_set(layer);
 915         /* enabling layer in hardware */
 916         spin_lock_irqsave(&layer->enq_slock, flags);
 917         layer->state = MXR_LAYER_STREAMING;
 918         spin_unlock_irqrestore(&layer->enq_slock, flags);
 919
 920         layer->ops.stream_set(layer, MXR_ENABLE);
 921         mxr_streamer_get(mdev);
 922
 923         return 0;
 924 }
 925
 926 static void mxr_watchdog(unsigned long arg)
 927 {
 928         struct mxr_layer *layer = (struct mxr_layer *) arg;
 929         struct mxr_device *mdev = layer->mdev;
 930         unsigned long flags;
 931
 932         mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
 933
 934         spin_lock_irqsave(&layer->enq_slock, flags);
 935
 936         if (layer->update_buf == layer->shadow_buf)
 937                 layer->update_buf = NULL;
 938         if (layer->update_buf) {
 939                 vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
 940                 layer->update_buf = NULL;
 941         }
 942         if (layer->shadow_buf) {
 943                 vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
 944                 layer->shadow_buf = NULL;
 945         }
 946         spin_unlock_irqrestore(&layer->enq_slock, flags);
 947 }
 948
 949 static int stop_streaming(struct vb2_queue *vq)
 950 {
 951         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 952         struct mxr_device *mdev = layer->mdev;
 953         unsigned long flags;
 954         struct timer_list watchdog;
 955         struct mxr_buffer *buf, *buf_tmp;
 956
 957         mxr_dbg(mdev, "%s\n", __func__);
 958
 959         spin_lock_irqsave(&layer->enq_slock, flags);
 960
 961         /* reset list */
 962         layer->state = MXR_LAYER_STREAMING_FINISH;
 963
 964         /* set all buffer to be done */
 965         list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
 966                 list_del(&buf->list);
 967                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 968         }
 969
 970         spin_unlock_irqrestore(&layer->enq_slock, flags);
 971
 972         /* give 1 seconds to complete to complete last buffers */
 973         setup_timer_on_stack(&watchdog, mxr_watchdog,
 974                 (unsigned long)layer);
 975         mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
 976
 977         /* wait until all buffers are goes to done state */
 978         vb2_wait_for_all_buffers(vq);
 979
 980         /* stop timer if all synchronization is done */
 981         del_timer_sync(&watchdog);
 982         destroy_timer_on_stack(&watchdog);
 983
 984         /* stopping hardware */
 985         spin_lock_irqsave(&layer->enq_slock, flags);
 986         layer->state = MXR_LAYER_IDLE;
 987         spin_unlock_irqrestore(&layer->enq_slock, flags);
 988
 989         /* disabling layer in hardware */
 990         layer->ops.stream_set(layer, MXR_DISABLE);
 991         /* remove one streamer */
 992         mxr_streamer_put(mdev);
 993         /* allow changes in output configuration */
 994         mxr_output_put(mdev);
 995         return 0;
 996 }
 997
 998 static struct vb2_ops mxr_video_qops = {
 999         .queue_setup = queue_setup,
1000         .buf_queue = buf_queue,
1001         .wait_prepare = wait_unlock,
1002         .wait_finish = wait_lock,
1003         .start_streaming = start_streaming,
1004         .stop_streaming = stop_streaming,
1005 };
1006
1007 /* FIXME: try to put this functions to mxr_base_layer_create */
1008 int mxr_base_layer_register(struct mxr_layer *layer)
1009 {
1010         struct mxr_device *mdev = layer->mdev;
1011         int ret;
1012
1013         ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
1014         if (ret)
1015                 mxr_err(mdev, "failed to register video device\n");
1016         else
1017                 mxr_info(mdev, "registered layer %s as /dev/video%d\n",
1018                         layer->vfd.name, layer->vfd.num);
1019         return ret;
1020 }
1021
1022 void mxr_base_layer_unregister(struct mxr_layer *layer)
1023 {
1024         video_unregister_device(&layer->vfd);
1025 }
1026
1027 void mxr_layer_release(struct mxr_layer *layer)
1028 {
1029         if (layer->ops.release)
1030                 layer->ops.release(layer);
1031 }
1032
1033 void mxr_base_layer_release(struct mxr_layer *layer)
1034 {
1035         kfree(layer);
1036 }
1037
1038 static void mxr_vfd_release(struct video_device *vdev)
1039 {
1040         printk(KERN_INFO "video device release\n");
1041 }
1042
1043 struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
1044         int idx, char *name, struct mxr_layer_ops *ops)
1045 {
1046         struct mxr_layer *layer;
1047
1048         layer = kzalloc(sizeof *layer, GFP_KERNEL);
1049         if (layer == NULL) {
1050                 mxr_err(mdev, "not enough memory for layer.\n");
1051                 goto fail;
1052         }
1053
1054         layer->mdev = mdev;
1055         layer->idx = idx;
1056         layer->ops = *ops;
1057
1058         spin_lock_init(&layer->enq_slock);
1059         INIT_LIST_HEAD(&layer->enq_list);
1060         mutex_init(&layer->mutex);
1061
1062         layer->vfd = (struct video_device) {
1063                 .minor = -1,
1064                 .release = mxr_vfd_release,
1065                 .fops = &mxr_fops,
1066                 .ioctl_ops = &mxr_ioctl_ops,
1067         };
1068         strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
1069         /* let framework control PRIORITY */
1070         set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags);
1071
1072         video_set_drvdata(&layer->vfd, layer);
1073         layer->vfd.lock = &layer->mutex;
1074         layer->vfd.v4l2_dev = &mdev->v4l2_dev;
1075
1076         layer->vb_queue = (struct vb2_queue) {
1077                 .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
1078                 .io_modes = VB2_MMAP | VB2_USERPTR,
1079                 .drv_priv = layer,
1080                 .buf_struct_size = sizeof(struct mxr_buffer),
1081                 .ops = &mxr_video_qops,
1082                 .mem_ops = &vb2_dma_contig_memops,
1083         };
1084
1085         return layer;
1086
1087 fail:
1088         return NULL;
1089 }
1090
1091 static const struct mxr_format *find_format_by_fourcc(
1092         struct mxr_layer *layer, unsigned long fourcc)
1093 {
1094         int i;
1095
1096         for (i = 0; i < layer->fmt_array_size; ++i)
1097                 if (layer->fmt_array[i]->fourcc == fourcc)
1098                         return layer->fmt_array[i];
1099         return NULL;
1100 }
1101
1102 static const struct mxr_format *find_format_by_index(
1103         struct mxr_layer *layer, unsigned long index)
1104 {
1105         if (index >= layer->fmt_array_size)
1106                 return NULL;
1107         return layer->fmt_array[index];
1108 }
1109