drivers/media/platform/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 #define pr_fmt(fmt) "s5p-tv (mixer): " fmt
  15
  16 #include "mixer.h"
  17
  18 #include <media/v4l2-ioctl.h>
  19 #include <linux/videodev2.h>
  20 #include <linux/mm.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/timer.h>
  24 #include <media/videobuf2-dma-contig.h>
  25
  26 static int find_reg_callback(struct device *dev, void *p)
  27 {
  28         struct v4l2_subdev **sd = p;
  29
  30         *sd = dev_get_drvdata(dev);
  31         /* non-zero value stops iteration */
  32         return 1;
  33 }
  34
  35 static struct v4l2_subdev *find_and_register_subdev(
  36         struct mxr_device *mdev, char *module_name)
  37 {
  38         struct device_driver *drv;
  39         struct v4l2_subdev *sd = NULL;
  40         int ret;
  41
  42         /* TODO: add waiting until probe is finished */
  43         drv = driver_find(module_name, &platform_bus_type);
  44         if (!drv) {
  45                 mxr_warn(mdev, "module %s is missing\n", module_name);
  46                 return NULL;
  47         }
  48         /* driver refcnt is increased, it is safe to iterate over devices */
  49         ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
  50         /* ret == 0 means that find_reg_callback was never executed */
  51         if (sd == NULL) {
  52                 mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
  53                 goto done;
  54         }
  55         /* v4l2_device_register_subdev detects if sd is NULL */
  56         ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
  57         if (ret) {
  58                 mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
  59                 sd = NULL;
  60         }
  61
  62 done:
  63         return sd;
  64 }
  65
  66 int mxr_acquire_video(struct mxr_device *mdev,
  67                       struct mxr_output_conf *output_conf, int output_count)
  68 {
  69         struct device *dev = mdev->dev;
  70         struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
  71         int i;
  72         int ret = 0;
  73         struct v4l2_subdev *sd;
  74
  75         strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
  76         /* prepare context for V4L2 device */
  77         ret = v4l2_device_register(dev, v4l2_dev);
  78         if (ret) {
  79                 mxr_err(mdev, "could not register v4l2 device.\n");
  80                 goto fail;
  81         }
  82
  83         mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
  84         if (IS_ERR(mdev->alloc_ctx)) {
  85                 mxr_err(mdev, "could not acquire vb2 allocator\n");
  86                 ret = PTR_ERR(mdev->alloc_ctx);
  87                 goto fail_v4l2_dev;
  88         }
  89
  90         /* registering outputs */
  91         mdev->output_cnt = 0;
  92         for (i = 0; i < output_count; ++i) {
  93                 struct mxr_output_conf *conf = &output_conf[i];
  94                 struct mxr_output *out;
  95
  96                 sd = find_and_register_subdev(mdev, conf->module_name);
  97                 /* trying to register next output */
  98                 if (sd == NULL)
  99                         continue;
 100                 out = kzalloc(sizeof(*out), GFP_KERNEL);
 101                 if (out == NULL) {
 102                         mxr_err(mdev, "no memory for '%s'\n",
 103                                 conf->output_name);
 104                         ret = -ENOMEM;
 105                         /* registered subdevs are removed in fail_v4l2_dev */
 106                         goto fail_output;
 107                 }
 108                 strlcpy(out->name, conf->output_name, sizeof(out->name));
 109                 out->sd = sd;
 110                 out->cookie = conf->cookie;
 111                 mdev->output[mdev->output_cnt++] = out;
 112                 mxr_info(mdev, "added output '%s' from module '%s'\n",
 113                         conf->output_name, conf->module_name);
 114                 /* checking if maximal number of outputs is reached */
 115                 if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
 116                         break;
 117         }
 118
 119         if (mdev->output_cnt == 0) {
 120                 mxr_err(mdev, "failed to register any output\n");
 121                 ret = -ENODEV;
 122                 /* skipping fail_output because there is nothing to free */
 123                 goto fail_vb2_allocator;
 124         }
 125
 126         return 0;
 127
 128 fail_output:
 129         /* kfree is NULL-safe */
 130         for (i = 0; i < mdev->output_cnt; ++i)
 131                 kfree(mdev->output[i]);
 132         memset(mdev->output, 0, sizeof(mdev->output));
 133
 134 fail_vb2_allocator:
 135         /* freeing allocator context */
 136         vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
 137
 138 fail_v4l2_dev:
 139         /* NOTE: automatically unregister all subdevs */
 140         v4l2_device_unregister(v4l2_dev);
 141
 142 fail:
 143         return ret;
 144 }
 145
 146 void mxr_release_video(struct mxr_device *mdev)
 147 {
 148         int i;
 149
 150         /* kfree is NULL-safe */
 151         for (i = 0; i < mdev->output_cnt; ++i)
 152                 kfree(mdev->output[i]);
 153
 154         vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
 155         v4l2_device_unregister(&mdev->v4l2_dev);
 156 }
 157
 158 static int mxr_querycap(struct file *file, void *priv,
 159         struct v4l2_capability *cap)
 160 {
 161         struct mxr_layer *layer = video_drvdata(file);
 162
 163         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 164
 165         strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof(cap->driver));
 166         strlcpy(cap->card, layer->vfd.name, sizeof(cap->card));
 167         sprintf(cap->bus_info, "%d", layer->idx);
 168         cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
 169         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 170
 171         return 0;
 172 }
 173
 174 static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
 175 {
 176         mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
 177                 geo->src.full_width, geo->src.full_height);
 178         mxr_dbg(mdev, "src.size = (%u, %u)\n",
 179                 geo->src.width, geo->src.height);
 180         mxr_dbg(mdev, "src.offset = (%u, %u)\n",
 181                 geo->src.x_offset, geo->src.y_offset);
 182         mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
 183                 geo->dst.full_width, geo->dst.full_height);
 184         mxr_dbg(mdev, "dst.size = (%u, %u)\n",
 185                 geo->dst.width, geo->dst.height);
 186         mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
 187                 geo->dst.x_offset, geo->dst.y_offset);
 188         mxr_dbg(mdev, "ratio = (%u, %u)\n",
 189                 geo->x_ratio, geo->y_ratio);
 190 }
 191
 192 static void mxr_layer_default_geo(struct mxr_layer *layer)
 193 {
 194         struct mxr_device *mdev = layer->mdev;
 195         struct v4l2_mbus_framefmt mbus_fmt;
 196
 197         memset(&layer->geo, 0, sizeof(layer->geo));
 198
 199         mxr_get_mbus_fmt(mdev, &mbus_fmt);
 200
 201         layer->geo.dst.full_width = mbus_fmt.width;
 202         layer->geo.dst.full_height = mbus_fmt.height;
 203         layer->geo.dst.width = layer->geo.dst.full_width;
 204         layer->geo.dst.height = layer->geo.dst.full_height;
 205         layer->geo.dst.field = mbus_fmt.field;
 206
 207         layer->geo.src.full_width = mbus_fmt.width;
 208         layer->geo.src.full_height = mbus_fmt.height;
 209         layer->geo.src.width = layer->geo.src.full_width;
 210         layer->geo.src.height = layer->geo.src.full_height;
 211
 212         mxr_geometry_dump(mdev, &layer->geo);
 213         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
 214         mxr_geometry_dump(mdev, &layer->geo);
 215 }
 216
 217 static void mxr_layer_update_output(struct mxr_layer *layer)
 218 {
 219         struct mxr_device *mdev = layer->mdev;
 220         struct v4l2_mbus_framefmt mbus_fmt;
 221
 222         mxr_get_mbus_fmt(mdev, &mbus_fmt);
 223         /* checking if update is needed */
 224         if (layer->geo.dst.full_width == mbus_fmt.width &&
 225                 layer->geo.dst.full_height == mbus_fmt.width)
 226                 return;
 227
 228         layer->geo.dst.full_width = mbus_fmt.width;
 229         layer->geo.dst.full_height = mbus_fmt.height;
 230         layer->geo.dst.field = mbus_fmt.field;
 231         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
 232
 233         mxr_geometry_dump(mdev, &layer->geo);
 234 }
 235
 236 static const struct mxr_format *find_format_by_fourcc(
 237         struct mxr_layer *layer, unsigned long fourcc);
 238 static const struct mxr_format *find_format_by_index(
 239         struct mxr_layer *layer, unsigned long index);
 240
 241 static int mxr_enum_fmt(struct file *file, void  *priv,
 242         struct v4l2_fmtdesc *f)
 243 {
 244         struct mxr_layer *layer = video_drvdata(file);
 245         struct mxr_device *mdev = layer->mdev;
 246         const struct mxr_format *fmt;
 247
 248         mxr_dbg(mdev, "%s\n", __func__);
 249         fmt = find_format_by_index(layer, f->index);
 250         if (fmt == NULL)
 251                 return -EINVAL;
 252
 253         strlcpy(f->description, fmt->name, sizeof(f->description));
 254         f->pixelformat = fmt->fourcc;
 255
 256         return 0;
 257 }
 258
 259 static unsigned int divup(unsigned int divident, unsigned int divisor)
 260 {
 261         return (divident + divisor - 1) / divisor;
 262 }
 263
 264 unsigned long mxr_get_plane_size(const struct mxr_block *blk,
 265         unsigned int width, unsigned int height)
 266 {
 267         unsigned int bl_width = divup(width, blk->width);
 268         unsigned int bl_height = divup(height, blk->height);
 269
 270         return bl_width * bl_height * blk->size;
 271 }
 272
 273 static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
 274         const struct mxr_format *fmt, u32 width, u32 height)
 275 {
 276         int i;
 277
 278         /* checking if nothing to fill */
 279         if (!planes)
 280                 return;
 281
 282         memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
 283         for (i = 0; i < fmt->num_planes; ++i) {
 284                 struct v4l2_plane_pix_format *plane = planes
 285                         + fmt->plane2subframe[i];
 286                 const struct mxr_block *blk = &fmt->plane[i];
 287                 u32 bl_width = divup(width, blk->width);
 288                 u32 bl_height = divup(height, blk->height);
 289                 u32 sizeimage = bl_width * bl_height * blk->size;
 290                 u16 bytesperline = bl_width * blk->size / blk->height;
 291
 292                 plane->sizeimage += sizeimage;
 293                 plane->bytesperline = max(plane->bytesperline, bytesperline);
 294         }
 295 }
 296
 297 static int mxr_g_fmt(struct file *file, void *priv,
 298                              struct v4l2_format *f)
 299 {
 300         struct mxr_layer *layer = video_drvdata(file);
 301         struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 302
 303         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 304
 305         pix->width = layer->geo.src.full_width;
 306         pix->height = layer->geo.src.full_height;
 307         pix->field = V4L2_FIELD_NONE;
 308         pix->pixelformat = layer->fmt->fourcc;
 309         pix->colorspace = layer->fmt->colorspace;
 310         mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
 311
 312         return 0;
 313 }
 314
 315 static int mxr_s_fmt(struct file *file, void *priv,
 316         struct v4l2_format *f)
 317 {
 318         struct mxr_layer *layer = video_drvdata(file);
 319         const struct mxr_format *fmt;
 320         struct v4l2_pix_format_mplane *pix;
 321         struct mxr_device *mdev = layer->mdev;
 322         struct mxr_geometry *geo = &layer->geo;
 323
 324         mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
 325
 326         pix = &f->fmt.pix_mp;
 327         fmt = find_format_by_fourcc(layer, pix->pixelformat);
 328         if (fmt == NULL) {
 329                 mxr_warn(mdev, "not recognized fourcc: %08x\n",
 330                         pix->pixelformat);
 331                 return -EINVAL;
 332         }
 333         layer->fmt = fmt;
 334         /* set source size to highest accepted value */
 335         geo->src.full_width = max(geo->dst.full_width, pix->width);
 336         geo->src.full_height = max(geo->dst.full_height, pix->height);
 337         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
 338         mxr_geometry_dump(mdev, &layer->geo);
 339         /* set cropping to total visible screen */
 340         geo->src.width = pix->width;
 341         geo->src.height = pix->height;
 342         geo->src.x_offset = 0;
 343         geo->src.y_offset = 0;
 344         /* assure consistency of geometry */
 345         layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
 346         mxr_geometry_dump(mdev, &layer->geo);
 347         /* set full size to lowest possible value */
 348         geo->src.full_width = 0;
 349         geo->src.full_height = 0;
 350         layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
 351         mxr_geometry_dump(mdev, &layer->geo);
 352
 353         /* returning results */
 354         mxr_g_fmt(file, priv, f);
 355
 356         return 0;
 357 }
 358
 359 static int mxr_g_selection(struct file *file, void *fh,
 360         struct v4l2_selection *s)
 361 {
 362         struct mxr_layer *layer = video_drvdata(file);
 363         struct mxr_geometry *geo = &layer->geo;
 364
 365         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 366
 367         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
 368                 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 369                 return -EINVAL;
 370
 371         switch (s->target) {
 372         case V4L2_SEL_TGT_CROP:
 373                 s->r.left = geo->src.x_offset;
 374                 s->r.top = geo->src.y_offset;
 375                 s->r.width = geo->src.width;
 376                 s->r.height = geo->src.height;
 377                 break;
 378         case V4L2_SEL_TGT_CROP_DEFAULT:
 379         case V4L2_SEL_TGT_CROP_BOUNDS:
 380                 s->r.left = 0;
 381                 s->r.top = 0;
 382                 s->r.width = geo->src.full_width;
 383                 s->r.height = geo->src.full_height;
 384                 break;
 385         case V4L2_SEL_TGT_COMPOSE:
 386         case V4L2_SEL_TGT_COMPOSE_PADDED:
 387                 s->r.left = geo->dst.x_offset;
 388                 s->r.top = geo->dst.y_offset;
 389                 s->r.width = geo->dst.width;
 390                 s->r.height = geo->dst.height;
 391                 break;
 392         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 393         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 394                 s->r.left = 0;
 395                 s->r.top = 0;
 396                 s->r.width = geo->dst.full_width;
 397                 s->r.height = geo->dst.full_height;
 398                 break;
 399         default:
 400                 return -EINVAL;
 401         }
 402
 403         return 0;
 404 }
 405
 406 /* returns 1 if rectangle 'a' is inside 'b' */
 407 static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
 408 {
 409         if (a->left < b->left)
 410                 return 0;
 411         if (a->top < b->top)
 412                 return 0;
 413         if (a->left + a->width > b->left + b->width)
 414                 return 0;
 415         if (a->top + a->height > b->top + b->height)
 416                 return 0;
 417         return 1;
 418 }
 419
 420 static int mxr_s_selection(struct file *file, void *fh,
 421         struct v4l2_selection *s)
 422 {
 423         struct mxr_layer *layer = video_drvdata(file);
 424         struct mxr_geometry *geo = &layer->geo;
 425         struct mxr_crop *target = NULL;
 426         enum mxr_geometry_stage stage;
 427         struct mxr_geometry tmp;
 428         struct v4l2_rect res;
 429
 430         memset(&res, 0, sizeof(res));
 431
 432         mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
 433                 s->r.width, s->r.height, s->r.left, s->r.top);
 434
 435         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
 436                 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 437                 return -EINVAL;
 438
 439         switch (s->target) {
 440         /* ignore read-only targets */
 441         case V4L2_SEL_TGT_CROP_DEFAULT:
 442         case V4L2_SEL_TGT_CROP_BOUNDS:
 443                 res.width = geo->src.full_width;
 444                 res.height = geo->src.full_height;
 445                 break;
 446
 447         /* ignore read-only targets */
 448         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 449         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 450                 res.width = geo->dst.full_width;
 451                 res.height = geo->dst.full_height;
 452                 break;
 453
 454         case V4L2_SEL_TGT_CROP:
 455                 target = &geo->src;
 456                 stage = MXR_GEOMETRY_CROP;
 457                 break;
 458         case V4L2_SEL_TGT_COMPOSE:
 459         case V4L2_SEL_TGT_COMPOSE_PADDED:
 460                 target = &geo->dst;
 461                 stage = MXR_GEOMETRY_COMPOSE;
 462                 break;
 463         default:
 464                 return -EINVAL;
 465         }
 466         /* apply change and update geometry if needed */
 467         if (target) {
 468                 /* backup current geometry if setup fails */
 469                 memcpy(&tmp, geo, sizeof(tmp));
 470
 471                 /* apply requested selection */
 472                 target->x_offset = s->r.left;
 473                 target->y_offset = s->r.top;
 474                 target->width = s->r.width;
 475                 target->height = s->r.height;
 476
 477                 layer->ops.fix_geometry(layer, stage, s->flags);
 478
 479                 /* retrieve update selection rectangle */
 480                 res.left = target->x_offset;
 481                 res.top = target->y_offset;
 482                 res.width = target->width;
 483                 res.height = target->height;
 484
 485                 mxr_geometry_dump(layer->mdev, &layer->geo);
 486         }
 487
 488         /* checking if the rectangle satisfies constraints */
 489         if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
 490                 goto fail;
 491         if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
 492                 goto fail;
 493
 494         /* return result rectangle */
 495         s->r = res;
 496
 497         return 0;
 498 fail:
 499         /* restore old geometry, which is not touched if target is NULL */
 500         if (target)
 501                 memcpy(geo, &tmp, sizeof(tmp));
 502         return -ERANGE;
 503 }
 504
 505 static int mxr_enum_dv_timings(struct file *file, void *fh,
 506         struct v4l2_enum_dv_timings *timings)
 507 {
 508         struct mxr_layer *layer = video_drvdata(file);
 509         struct mxr_device *mdev = layer->mdev;
 510         int ret;
 511
 512         /* lock protects from changing sd_out */
 513         mutex_lock(&mdev->mutex);
 514         ret = v4l2_subdev_call(to_outsd(mdev), video, enum_dv_timings, timings);
 515         mutex_unlock(&mdev->mutex);
 516
 517         return ret ? -EINVAL : 0;
 518 }
 519
 520 static int mxr_s_dv_timings(struct file *file, void *fh,
 521         struct v4l2_dv_timings *timings)
 522 {
 523         struct mxr_layer *layer = video_drvdata(file);
 524         struct mxr_device *mdev = layer->mdev;
 525         int ret;
 526
 527         /* lock protects from changing sd_out */
 528         mutex_lock(&mdev->mutex);
 529
 530         /* timings change cannot be done while there is an entity
 531          * dependant on output configuration
 532          */
 533         if (mdev->n_output > 0) {
 534                 mutex_unlock(&mdev->mutex);
 535                 return -EBUSY;
 536         }
 537
 538         ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_timings, timings);
 539
 540         mutex_unlock(&mdev->mutex);
 541
 542         mxr_layer_update_output(layer);
 543
 544         /* any failure should return EINVAL according to V4L2 doc */
 545         return ret ? -EINVAL : 0;
 546 }
 547
 548 static int mxr_g_dv_timings(struct file *file, void *fh,
 549         struct v4l2_dv_timings *timings)
 550 {
 551         struct mxr_layer *layer = video_drvdata(file);
 552         struct mxr_device *mdev = layer->mdev;
 553         int ret;
 554
 555         /* lock protects from changing sd_out */
 556         mutex_lock(&mdev->mutex);
 557         ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_timings, timings);
 558         mutex_unlock(&mdev->mutex);
 559
 560         return ret ? -EINVAL : 0;
 561 }
 562
 563 static int mxr_dv_timings_cap(struct file *file, void *fh,
 564         struct v4l2_dv_timings_cap *cap)
 565 {
 566         struct mxr_layer *layer = video_drvdata(file);
 567         struct mxr_device *mdev = layer->mdev;
 568         int ret;
 569
 570         /* lock protects from changing sd_out */
 571         mutex_lock(&mdev->mutex);
 572         ret = v4l2_subdev_call(to_outsd(mdev), video, dv_timings_cap, cap);
 573         mutex_unlock(&mdev->mutex);
 574
 575         return ret ? -EINVAL : 0;
 576 }
 577
 578 static int mxr_s_std(struct file *file, void *fh, v4l2_std_id norm)
 579 {
 580         struct mxr_layer *layer = video_drvdata(file);
 581         struct mxr_device *mdev = layer->mdev;
 582         int ret;
 583
 584         /* lock protects from changing sd_out */
 585         mutex_lock(&mdev->mutex);
 586
 587         /* standard change cannot be done while there is an entity
 588          * dependant on output configuration
 589          */
 590         if (mdev->n_output > 0) {
 591                 mutex_unlock(&mdev->mutex);
 592                 return -EBUSY;
 593         }
 594
 595         ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, norm);
 596
 597         mutex_unlock(&mdev->mutex);
 598
 599         mxr_layer_update_output(layer);
 600
 601         return ret ? -EINVAL : 0;
 602 }
 603
 604 static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
 605 {
 606         struct mxr_layer *layer = video_drvdata(file);
 607         struct mxr_device *mdev = layer->mdev;
 608         int ret;
 609
 610         /* lock protects from changing sd_out */
 611         mutex_lock(&mdev->mutex);
 612         ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
 613         mutex_unlock(&mdev->mutex);
 614
 615         return ret ? -EINVAL : 0;
 616 }
 617
 618 static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
 619 {
 620         struct mxr_layer *layer = video_drvdata(file);
 621         struct mxr_device *mdev = layer->mdev;
 622         struct mxr_output *out;
 623         struct v4l2_subdev *sd;
 624
 625         if (a->index >= mdev->output_cnt)
 626                 return -EINVAL;
 627         out = mdev->output[a->index];
 628         BUG_ON(out == NULL);
 629         sd = out->sd;
 630         strlcpy(a->name, out->name, sizeof(a->name));
 631
 632         /* try to obtain supported tv norms */
 633         v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
 634         a->capabilities = 0;
 635         if (sd->ops->video && sd->ops->video->s_dv_timings)
 636                 a->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
 637         if (sd->ops->video && sd->ops->video->s_std_output)
 638                 a->capabilities |= V4L2_OUT_CAP_STD;
 639         a->type = V4L2_OUTPUT_TYPE_ANALOG;
 640
 641         return 0;
 642 }
 643
 644 static int mxr_s_output(struct file *file, void *fh, unsigned int i)
 645 {
 646         struct video_device *vfd = video_devdata(file);
 647         struct mxr_layer *layer = video_drvdata(file);
 648         struct mxr_device *mdev = layer->mdev;
 649
 650         if (i >= mdev->output_cnt || mdev->output[i] == NULL)
 651                 return -EINVAL;
 652
 653         mutex_lock(&mdev->mutex);
 654         if (mdev->n_output > 0) {
 655                 mutex_unlock(&mdev->mutex);
 656                 return -EBUSY;
 657         }
 658         mdev->current_output = i;
 659         vfd->tvnorms = 0;
 660         v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
 661                 &vfd->tvnorms);
 662         mutex_unlock(&mdev->mutex);
 663
 664         /* update layers geometry */
 665         mxr_layer_update_output(layer);
 666
 667         mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
 668
 669         return 0;
 670 }
 671
 672 static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
 673 {
 674         struct mxr_layer *layer = video_drvdata(file);
 675         struct mxr_device *mdev = layer->mdev;
 676
 677         mutex_lock(&mdev->mutex);
 678         *p = mdev->current_output;
 679         mutex_unlock(&mdev->mutex);
 680
 681         return 0;
 682 }
 683
 684 static int mxr_reqbufs(struct file *file, void *priv,
 685                           struct v4l2_requestbuffers *p)
 686 {
 687         struct mxr_layer *layer = video_drvdata(file);
 688
 689         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 690         return vb2_reqbufs(&layer->vb_queue, p);
 691 }
 692
 693 static int mxr_querybuf(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_querybuf(&layer->vb_queue, p);
 699 }
 700
 701 static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 702 {
 703         struct mxr_layer *layer = video_drvdata(file);
 704
 705         mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
 706         return vb2_qbuf(&layer->vb_queue, p);
 707 }
 708
 709 static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 710 {
 711         struct mxr_layer *layer = video_drvdata(file);
 712
 713         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 714         return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
 715 }
 716
 717 static int mxr_expbuf(struct file *file, void *priv,
 718         struct v4l2_exportbuffer *eb)
 719 {
 720         struct mxr_layer *layer = video_drvdata(file);
 721
 722         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 723         return vb2_expbuf(&layer->vb_queue, eb);
 724 }
 725
 726 static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 727 {
 728         struct mxr_layer *layer = video_drvdata(file);
 729
 730         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 731         return vb2_streamon(&layer->vb_queue, i);
 732 }
 733
 734 static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 735 {
 736         struct mxr_layer *layer = video_drvdata(file);
 737
 738         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 739         return vb2_streamoff(&layer->vb_queue, i);
 740 }
 741
 742 static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
 743         .vidioc_querycap = mxr_querycap,
 744         /* format handling */
 745         .vidioc_enum_fmt_vid_out_mplane = mxr_enum_fmt,
 746         .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
 747         .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
 748         /* buffer control */
 749         .vidioc_reqbufs = mxr_reqbufs,
 750         .vidioc_querybuf = mxr_querybuf,
 751         .vidioc_qbuf = mxr_qbuf,
 752         .vidioc_dqbuf = mxr_dqbuf,
 753         .vidioc_expbuf = mxr_expbuf,
 754         /* Streaming control */
 755         .vidioc_streamon = mxr_streamon,
 756         .vidioc_streamoff = mxr_streamoff,
 757         /* DV Timings functions */
 758         .vidioc_enum_dv_timings = mxr_enum_dv_timings,
 759         .vidioc_s_dv_timings = mxr_s_dv_timings,
 760         .vidioc_g_dv_timings = mxr_g_dv_timings,
 761         .vidioc_dv_timings_cap = mxr_dv_timings_cap,
 762         /* analog TV standard functions */
 763         .vidioc_s_std = mxr_s_std,
 764         .vidioc_g_std = mxr_g_std,
 765         /* Output handling */
 766         .vidioc_enum_output = mxr_enum_output,
 767         .vidioc_s_output = mxr_s_output,
 768         .vidioc_g_output = mxr_g_output,
 769         /* selection ioctls */
 770         .vidioc_g_selection = mxr_g_selection,
 771         .vidioc_s_selection = mxr_s_selection,
 772 };
 773
 774 static int mxr_video_open(struct file *file)
 775 {
 776         struct mxr_layer *layer = video_drvdata(file);
 777         struct mxr_device *mdev = layer->mdev;
 778         int ret = 0;
 779
 780         mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
 781         if (mutex_lock_interruptible(&layer->mutex))
 782                 return -ERESTARTSYS;
 783         /* assure device probe is finished */
 784         wait_for_device_probe();
 785         /* creating context for file descriptor */
 786         ret = v4l2_fh_open(file);
 787         if (ret) {
 788                 mxr_err(mdev, "v4l2_fh_open failed\n");
 789                 goto unlock;
 790         }
 791
 792         /* leaving if layer is already initialized */
 793         if (!v4l2_fh_is_singular_file(file))
 794                 goto unlock;
 795
 796         /* FIXME: should power be enabled on open? */
 797         ret = mxr_power_get(mdev);
 798         if (ret) {
 799                 mxr_err(mdev, "power on failed\n");
 800                 goto fail_fh_open;
 801         }
 802
 803         ret = vb2_queue_init(&layer->vb_queue);
 804         if (ret != 0) {
 805                 mxr_err(mdev, "failed to initialize vb2 queue\n");
 806                 goto fail_power;
 807         }
 808         /* set default format, first on the list */
 809         layer->fmt = layer->fmt_array[0];
 810         /* setup default geometry */
 811         mxr_layer_default_geo(layer);
 812         mutex_unlock(&layer->mutex);
 813
 814         return 0;
 815
 816 fail_power:
 817         mxr_power_put(mdev);
 818
 819 fail_fh_open:
 820         v4l2_fh_release(file);
 821
 822 unlock:
 823         mutex_unlock(&layer->mutex);
 824
 825         return ret;
 826 }
 827
 828 static unsigned int
 829 mxr_video_poll(struct file *file, struct poll_table_struct *wait)
 830 {
 831         struct mxr_layer *layer = video_drvdata(file);
 832         unsigned int res;
 833
 834         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 835
 836         mutex_lock(&layer->mutex);
 837         res = vb2_poll(&layer->vb_queue, file, wait);
 838         mutex_unlock(&layer->mutex);
 839         return res;
 840 }
 841
 842 static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
 843 {
 844         struct mxr_layer *layer = video_drvdata(file);
 845         int ret;
 846
 847         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 848
 849         if (mutex_lock_interruptible(&layer->mutex))
 850                 return -ERESTARTSYS;
 851         ret = vb2_mmap(&layer->vb_queue, vma);
 852         mutex_unlock(&layer->mutex);
 853         return ret;
 854 }
 855
 856 static int mxr_video_release(struct file *file)
 857 {
 858         struct mxr_layer *layer = video_drvdata(file);
 859
 860         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
 861         mutex_lock(&layer->mutex);
 862         if (v4l2_fh_is_singular_file(file)) {
 863                 vb2_queue_release(&layer->vb_queue);
 864                 mxr_power_put(layer->mdev);
 865         }
 866         v4l2_fh_release(file);
 867         mutex_unlock(&layer->mutex);
 868         return 0;
 869 }
 870
 871 static const struct v4l2_file_operations mxr_fops = {
 872         .owner = THIS_MODULE,
 873         .open = mxr_video_open,
 874         .poll = mxr_video_poll,
 875         .mmap = mxr_video_mmap,
 876         .release = mxr_video_release,
 877         .unlocked_ioctl = video_ioctl2,
 878 };
 879
 880 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
 881         unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
 882         void *alloc_ctxs[])
 883 {
 884         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 885         const struct mxr_format *fmt = layer->fmt;
 886         int i;
 887         struct mxr_device *mdev = layer->mdev;
 888         struct v4l2_plane_pix_format planes[3];
 889
 890         mxr_dbg(mdev, "%s\n", __func__);
 891         /* checking if format was configured */
 892         if (fmt == NULL)
 893                 return -EINVAL;
 894         mxr_dbg(mdev, "fmt = %s\n", fmt->name);
 895         mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
 896                 layer->geo.src.full_height);
 897
 898         *nplanes = fmt->num_subframes;
 899         for (i = 0; i < fmt->num_subframes; ++i) {
 900                 alloc_ctxs[i] = layer->mdev->alloc_ctx;
 901                 sizes[i] = planes[i].sizeimage;
 902                 mxr_dbg(mdev, "size[%d] = %08x\n", i, sizes[i]);
 903         }
 904
 905         if (*nbuffers == 0)
 906                 *nbuffers = 1;
 907
 908         return 0;
 909 }
 910
 911 static void buf_queue(struct vb2_buffer *vb)
 912 {
 913         struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
 914         struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
 915         struct mxr_device *mdev = layer->mdev;
 916         unsigned long flags;
 917
 918         spin_lock_irqsave(&layer->enq_slock, flags);
 919         list_add_tail(&buffer->list, &layer->enq_list);
 920         spin_unlock_irqrestore(&layer->enq_slock, flags);
 921
 922         mxr_dbg(mdev, "queuing buffer\n");
 923 }
 924
 925 static void wait_lock(struct vb2_queue *vq)
 926 {
 927         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 928
 929         mxr_dbg(layer->mdev, "%s\n", __func__);
 930         mutex_lock(&layer->mutex);
 931 }
 932
 933 static void wait_unlock(struct vb2_queue *vq)
 934 {
 935         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 936
 937         mxr_dbg(layer->mdev, "%s\n", __func__);
 938         mutex_unlock(&layer->mutex);
 939 }
 940
 941 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 942 {
 943         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 944         struct mxr_device *mdev = layer->mdev;
 945         unsigned long flags;
 946
 947         mxr_dbg(mdev, "%s\n", __func__);
 948
 949         if (count == 0) {
 950                 mxr_dbg(mdev, "no output buffers queued\n");
 951                 return -EINVAL;
 952         }
 953
 954         /* block any changes in output configuration */
 955         mxr_output_get(mdev);
 956
 957         mxr_layer_update_output(layer);
 958         layer->ops.format_set(layer);
 959         /* enabling layer in hardware */
 960         spin_lock_irqsave(&layer->enq_slock, flags);
 961         layer->state = MXR_LAYER_STREAMING;
 962         spin_unlock_irqrestore(&layer->enq_slock, flags);
 963
 964         layer->ops.stream_set(layer, MXR_ENABLE);
 965         mxr_streamer_get(mdev);
 966
 967         return 0;
 968 }
 969
 970 static void mxr_watchdog(unsigned long arg)
 971 {
 972         struct mxr_layer *layer = (struct mxr_layer *) arg;
 973         struct mxr_device *mdev = layer->mdev;
 974         unsigned long flags;
 975
 976         mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
 977
 978         spin_lock_irqsave(&layer->enq_slock, flags);
 979
 980         if (layer->update_buf == layer->shadow_buf)
 981                 layer->update_buf = NULL;
 982         if (layer->update_buf) {
 983                 vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
 984                 layer->update_buf = NULL;
 985         }
 986         if (layer->shadow_buf) {
 987                 vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
 988                 layer->shadow_buf = NULL;
 989         }
 990         spin_unlock_irqrestore(&layer->enq_slock, flags);
 991 }
 992
 993 static int stop_streaming(struct vb2_queue *vq)
 994 {
 995         struct mxr_layer *layer = vb2_get_drv_priv(vq);
 996         struct mxr_device *mdev = layer->mdev;
 997         unsigned long flags;
 998         struct timer_list watchdog;
 999         struct mxr_buffer *buf, *buf_tmp;
1000
1001         mxr_dbg(mdev, "%s\n", __func__);
1002
1003         spin_lock_irqsave(&layer->enq_slock, flags);
1004
1005         /* reset list */
1006         layer->state = MXR_LAYER_STREAMING_FINISH;
1007
1008         /* set all buffer to be done */
1009         list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
1010                 list_del(&buf->list);
1011                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
1012         }
1013
1014         spin_unlock_irqrestore(&layer->enq_slock, flags);
1015
1016         /* give 1 seconds to complete to complete last buffers */
1017         setup_timer_on_stack(&watchdog, mxr_watchdog,
1018                 (unsigned long)layer);
1019         mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
1020
1021         /* wait until all buffers are goes to done state */
1022         vb2_wait_for_all_buffers(vq);
1023
1024         /* stop timer if all synchronization is done */
1025         del_timer_sync(&watchdog);
1026         destroy_timer_on_stack(&watchdog);
1027
1028         /* stopping hardware */
1029         spin_lock_irqsave(&layer->enq_slock, flags);
1030         layer->state = MXR_LAYER_IDLE;
1031         spin_unlock_irqrestore(&layer->enq_slock, flags);
1032
1033         /* disabling layer in hardware */
1034         layer->ops.stream_set(layer, MXR_DISABLE);
1035         /* remove one streamer */
1036         mxr_streamer_put(mdev);
1037         /* allow changes in output configuration */
1038         mxr_output_put(mdev);
1039         return 0;
1040 }
1041
1042 static struct vb2_ops mxr_video_qops = {
1043         .queue_setup = queue_setup,
1044         .buf_queue = buf_queue,
1045         .wait_prepare = wait_unlock,
1046         .wait_finish = wait_lock,
1047         .start_streaming = start_streaming,
1048         .stop_streaming = stop_streaming,
1049 };
1050
1051 /* FIXME: try to put this functions to mxr_base_layer_create */
1052 int mxr_base_layer_register(struct mxr_layer *layer)
1053 {
1054         struct mxr_device *mdev = layer->mdev;
1055         int ret;
1056
1057         ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
1058         if (ret)
1059                 mxr_err(mdev, "failed to register video device\n");
1060         else
1061                 mxr_info(mdev, "registered layer %s as /dev/video%d\n",
1062                         layer->vfd.name, layer->vfd.num);
1063         return ret;
1064 }
1065
1066 void mxr_base_layer_unregister(struct mxr_layer *layer)
1067 {
1068         video_unregister_device(&layer->vfd);
1069 }
1070
1071 void mxr_layer_release(struct mxr_layer *layer)
1072 {
1073         if (layer->ops.release)
1074                 layer->ops.release(layer);
1075 }
1076
1077 void mxr_base_layer_release(struct mxr_layer *layer)
1078 {
1079         kfree(layer);
1080 }
1081
1082 static void mxr_vfd_release(struct video_device *vdev)
1083 {
1084         pr_info("video device release\n");
1085 }
1086
1087 struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
1088         int idx, char *name, struct mxr_layer_ops *ops)
1089 {
1090         struct mxr_layer *layer;
1091
1092         layer = kzalloc(sizeof(*layer), GFP_KERNEL);
1093         if (layer == NULL) {
1094                 mxr_err(mdev, "not enough memory for layer.\n");
1095                 goto fail;
1096         }
1097
1098         layer->mdev = mdev;
1099         layer->idx = idx;
1100         layer->ops = *ops;
1101
1102         spin_lock_init(&layer->enq_slock);
1103         INIT_LIST_HEAD(&layer->enq_list);
1104         mutex_init(&layer->mutex);
1105
1106         layer->vfd = (struct video_device) {
1107                 .minor = -1,
1108                 .release = mxr_vfd_release,
1109                 .fops = &mxr_fops,
1110                 .vfl_dir = VFL_DIR_TX,
1111                 .ioctl_ops = &mxr_ioctl_ops,
1112         };
1113         strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
1114         /* let framework control PRIORITY */
1115         set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags);
1116
1117         video_set_drvdata(&layer->vfd, layer);
1118         layer->vfd.lock = &layer->mutex;
1119         layer->vfd.v4l2_dev = &mdev->v4l2_dev;
1120
1121         layer->vb_queue = (struct vb2_queue) {
1122                 .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
1123                 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF,
1124                 .drv_priv = layer,
1125                 .buf_struct_size = sizeof(struct mxr_buffer),
1126                 .ops = &mxr_video_qops,
1127                 .mem_ops = &vb2_dma_contig_memops,
1128         };
1129
1130         return layer;
1131
1132 fail:
1133         return NULL;
1134 }
1135
1136 static const struct mxr_format *find_format_by_fourcc(
1137         struct mxr_layer *layer, unsigned long fourcc)
1138 {
1139         int i;
1140
1141         for (i = 0; i < layer->fmt_array_size; ++i)
1142                 if (layer->fmt_array[i]->fourcc == fourcc)
1143                         return layer->fmt_array[i];
1144         return NULL;
1145 }
1146
1147 static const struct mxr_format *find_format_by_index(
1148         struct mxr_layer *layer, unsigned long index)
1149 {
1150         if (index >= layer->fmt_array_size)
1151                 return NULL;
1152         return layer->fmt_array[index];
1153 }
1154