drivers/media/platform/davinci/vpbe_display.c

   1 /*
   2  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/errno.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/string.h>
  19 #include <linux/wait.h>
  20 #include <linux/time.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/irq.h>
  23 #include <linux/mm.h>
  24 #include <linux/mutex.h>
  25 #include <linux/videodev2.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/pgtable.h>
  29 #include <mach/cputype.h>
  30
  31 #include <media/v4l2-dev.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-ioctl.h>
  34 #include <media/v4l2-device.h>
  35 #include <media/davinci/vpbe_display.h>
  36 #include <media/davinci/vpbe_types.h>
  37 #include <media/davinci/vpbe.h>
  38 #include <media/davinci/vpbe_venc.h>
  39 #include <media/davinci/vpbe_osd.h>
  40 #include "vpbe_venc_regs.h"
  41
  42 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
  43
  44 static int debug;
  45
  46 #define VPBE_DEFAULT_NUM_BUFS 3
  47
  48 module_param(debug, int, 0644);
  49
  50 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
  51                         struct vpbe_layer *layer);
  52
  53 static int venc_is_second_field(struct vpbe_display *disp_dev)
  54 {
  55         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
  56         int ret;
  57         int val;
  58
  59         ret = v4l2_subdev_call(vpbe_dev->venc,
  60                                core,
  61                                ioctl,
  62                                VENC_GET_FLD,
  63                                &val);
  64         if (ret < 0) {
  65                 v4l2_err(&vpbe_dev->v4l2_dev,
  66                          "Error in getting Field ID 0\n");
  67         }
  68         return val;
  69 }
  70
  71 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
  72                                 struct vpbe_layer *layer)
  73 {
  74         struct timespec timevalue;
  75
  76         if (layer->cur_frm == layer->next_frm)
  77                 return;
  78         ktime_get_ts(&timevalue);
  79         layer->cur_frm->vb.v4l2_buf.timestamp.tv_sec =
  80                 timevalue.tv_sec;
  81         layer->cur_frm->vb.v4l2_buf.timestamp.tv_usec =
  82                 timevalue.tv_nsec / NSEC_PER_USEC;
  83         vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_DONE);
  84         /* Make cur_frm pointing to next_frm */
  85         layer->cur_frm = layer->next_frm;
  86 }
  87
  88 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
  89                                 struct vpbe_layer *layer)
  90 {
  91         struct osd_state *osd_device = disp_obj->osd_device;
  92         unsigned long addr;
  93
  94         spin_lock(&disp_obj->dma_queue_lock);
  95         if (list_empty(&layer->dma_queue) ||
  96                 (layer->cur_frm != layer->next_frm)) {
  97                 spin_unlock(&disp_obj->dma_queue_lock);
  98                 return;
  99         }
 100         /*
 101          * one field is displayed configure
 102          * the next frame if it is available
 103          * otherwise hold on current frame
 104          * Get next from the buffer queue
 105          */
 106         layer->next_frm = list_entry(layer->dma_queue.next,
 107                           struct  vpbe_disp_buffer, list);
 108         /* Remove that from the buffer queue */
 109         list_del(&layer->next_frm->list);
 110         spin_unlock(&disp_obj->dma_queue_lock);
 111         /* Mark state of the frame to active */
 112         layer->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 113         addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb, 0);
 114         osd_device->ops.start_layer(osd_device,
 115                         layer->layer_info.id,
 116                         addr,
 117                         disp_obj->cbcr_ofst);
 118 }
 119
 120 /* interrupt service routine */
 121 static irqreturn_t venc_isr(int irq, void *arg)
 122 {
 123         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
 124         struct vpbe_layer *layer;
 125         static unsigned last_event;
 126         unsigned event = 0;
 127         int fid;
 128         int i;
 129
 130         if ((NULL == arg) || (NULL == disp_dev->dev[0]))
 131                 return IRQ_HANDLED;
 132
 133         if (venc_is_second_field(disp_dev))
 134                 event |= VENC_SECOND_FIELD;
 135         else
 136                 event |= VENC_FIRST_FIELD;
 137
 138         if (event == (last_event & ~VENC_END_OF_FRAME)) {
 139                 /*
 140                 * If the display is non-interlaced, then we need to flag the
 141                 * end-of-frame event at every interrupt regardless of the
 142                 * value of the FIDST bit.  We can conclude that the display is
 143                 * non-interlaced if the value of the FIDST bit is unchanged
 144                 * from the previous interrupt.
 145                 */
 146                 event |= VENC_END_OF_FRAME;
 147         } else if (event == VENC_SECOND_FIELD) {
 148                 /* end-of-frame for interlaced display */
 149                 event |= VENC_END_OF_FRAME;
 150         }
 151         last_event = event;
 152
 153         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
 154                 layer = disp_dev->dev[i];
 155                 /* If streaming is started in this layer */
 156                 if (!layer->started)
 157                         continue;
 158
 159                 if (layer->layer_first_int) {
 160                         layer->layer_first_int = 0;
 161                         continue;
 162                 }
 163                 /* Check the field format */
 164                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
 165                         (event & VENC_END_OF_FRAME)) {
 166                         /* Progressive mode */
 167
 168                         vpbe_isr_even_field(disp_dev, layer);
 169                         vpbe_isr_odd_field(disp_dev, layer);
 170                 } else {
 171                 /* Interlaced mode */
 172
 173                         layer->field_id ^= 1;
 174                         if (event & VENC_FIRST_FIELD)
 175                                 fid = 0;
 176                         else
 177                                 fid = 1;
 178
 179                         /*
 180                         * If field id does not match with store
 181                         * field id
 182                         */
 183                         if (fid != layer->field_id) {
 184                                 /* Make them in sync */
 185                                 layer->field_id = fid;
 186                                 continue;
 187                         }
 188                         /*
 189                         * device field id and local field id are
 190                         * in sync. If this is even field
 191                         */
 192                         if (0 == fid)
 193                                 vpbe_isr_even_field(disp_dev, layer);
 194                         else  /* odd field */
 195                                 vpbe_isr_odd_field(disp_dev, layer);
 196                 }
 197         }
 198
 199         return IRQ_HANDLED;
 200 }
 201
 202 /*
 203  * vpbe_buffer_prepare()
 204  * This is the callback function called from vb2_qbuf() function
 205  * the buffer is prepared and user space virtual address is converted into
 206  * physical address
 207  */
 208 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
 209 {
 210         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 211         struct vb2_queue *q = vb->vb2_queue;
 212         struct vpbe_layer *layer = fh->layer;
 213         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 214         unsigned long addr;
 215
 216         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 217                                 "vpbe_buffer_prepare\n");
 218
 219         if (vb->state != VB2_BUF_STATE_ACTIVE &&
 220                 vb->state != VB2_BUF_STATE_PREPARED) {
 221                 vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
 222                 if (vb2_plane_vaddr(vb, 0) &&
 223                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 224                         return -EINVAL;
 225
 226                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 227                 if (q->streaming) {
 228                         if (!IS_ALIGNED(addr, 8)) {
 229                                 v4l2_err(&vpbe_dev->v4l2_dev,
 230                                         "buffer_prepare:offset is \
 231                                         not aligned to 32 bytes\n");
 232                                 return -EINVAL;
 233                         }
 234                 }
 235         }
 236         return 0;
 237 }
 238
 239 /*
 240  * vpbe_buffer_setup()
 241  * This function allocates memory for the buffers
 242  */
 243 static int
 244 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 245                         unsigned int *nbuffers, unsigned int *nplanes,
 246                         unsigned int sizes[], void *alloc_ctxs[])
 247
 248 {
 249         /* Get the file handle object and layer object */
 250         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 251         struct vpbe_layer *layer = fh->layer;
 252         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 253
 254         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 255
 256         /* Store number of buffers allocated in numbuffer member */
 257         if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
 258                 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
 259
 260         *nplanes = 1;
 261         sizes[0] = layer->pix_fmt.sizeimage;
 262         alloc_ctxs[0] = layer->alloc_ctx;
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * vpbe_buffer_queue()
 269  * This function adds the buffer to DMA queue
 270  */
 271 static void vpbe_buffer_queue(struct vb2_buffer *vb)
 272 {
 273         /* Get the file handle object and layer object */
 274         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 275         struct vpbe_disp_buffer *buf = container_of(vb,
 276                                 struct vpbe_disp_buffer, vb);
 277         struct vpbe_layer *layer = fh->layer;
 278         struct vpbe_display *disp = fh->disp_dev;
 279         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 280         unsigned long flags;
 281
 282         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 283                         "vpbe_buffer_queue\n");
 284
 285         /* add the buffer to the DMA queue */
 286         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 287         list_add_tail(&buf->list, &layer->dma_queue);
 288         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 289 }
 290
 291 /*
 292  * vpbe_buf_cleanup()
 293  * This function is called from the vb2 layer to free memory allocated to
 294  * the buffers
 295  */
 296 static void vpbe_buf_cleanup(struct vb2_buffer *vb)
 297 {
 298         /* Get the file handle object and layer object */
 299         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 300         struct vpbe_layer *layer = fh->layer;
 301         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 302         struct vpbe_disp_buffer *buf = container_of(vb,
 303                                         struct vpbe_disp_buffer, vb);
 304         unsigned long flags;
 305
 306         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 307                         "vpbe_buf_cleanup\n");
 308
 309         spin_lock_irqsave(&layer->irqlock, flags);
 310         if (vb->state == VB2_BUF_STATE_ACTIVE)
 311                 list_del_init(&buf->list);
 312         spin_unlock_irqrestore(&layer->irqlock, flags);
 313 }
 314
 315 static void vpbe_wait_prepare(struct vb2_queue *vq)
 316 {
 317         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 318         struct vpbe_layer *layer = fh->layer;
 319
 320         mutex_unlock(&layer->opslock);
 321 }
 322
 323 static void vpbe_wait_finish(struct vb2_queue *vq)
 324 {
 325         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 326         struct vpbe_layer *layer = fh->layer;
 327
 328         mutex_lock(&layer->opslock);
 329 }
 330
 331 static int vpbe_buffer_init(struct vb2_buffer *vb)
 332 {
 333         struct vpbe_disp_buffer *buf = container_of(vb,
 334                                         struct vpbe_disp_buffer, vb);
 335
 336         INIT_LIST_HEAD(&buf->list);
 337         return 0;
 338 }
 339
 340 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
 341 {
 342         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 343         struct vpbe_layer *layer = fh->layer;
 344         int ret;
 345
 346         /* Get the next frame from the buffer queue */
 347         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 348                                 struct vpbe_disp_buffer, list);
 349         /* Remove buffer from the buffer queue */
 350         list_del(&layer->cur_frm->list);
 351         /* Mark state of the current frame to active */
 352         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 353         /* Initialize field_id and started member */
 354         layer->field_id = 0;
 355
 356         /* Set parameters in OSD and VENC */
 357         ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
 358         if (ret < 0)
 359                 return ret;
 360
 361         /*
 362          * if request format is yuv420 semiplanar, need to
 363          * enable both video windows
 364          */
 365         layer->started = 1;
 366         layer->layer_first_int = 1;
 367
 368         return ret;
 369 }
 370
 371 static int vpbe_stop_streaming(struct vb2_queue *vq)
 372 {
 373         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 374         struct vpbe_layer *layer = fh->layer;
 375
 376         if (!vb2_is_streaming(vq))
 377                 return 0;
 378
 379         /* release all active buffers */
 380         while (!list_empty(&layer->dma_queue)) {
 381                 layer->next_frm = list_entry(layer->dma_queue.next,
 382                                                 struct vpbe_disp_buffer, list);
 383                 list_del(&layer->next_frm->list);
 384                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
 385         }
 386
 387         return 0;
 388 }
 389
 390 static struct vb2_ops video_qops = {
 391         .queue_setup = vpbe_buffer_queue_setup,
 392         .wait_prepare = vpbe_wait_prepare,
 393         .wait_finish = vpbe_wait_finish,
 394         .buf_init = vpbe_buffer_init,
 395         .buf_prepare = vpbe_buffer_prepare,
 396         .start_streaming = vpbe_start_streaming,
 397         .stop_streaming = vpbe_stop_streaming,
 398         .buf_cleanup = vpbe_buf_cleanup,
 399         .buf_queue = vpbe_buffer_queue,
 400 };
 401
 402 static
 403 struct vpbe_layer*
 404 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 405                         struct vpbe_layer *layer)
 406 {
 407         enum vpbe_display_device_id thiswin, otherwin;
 408         thiswin = layer->device_id;
 409
 410         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 411         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 412         return disp_dev->dev[otherwin];
 413 }
 414
 415 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 416                         struct vpbe_layer *layer)
 417 {
 418         struct osd_layer_config *cfg  = &layer->layer_info.config;
 419         struct osd_state *osd_device = disp_dev->osd_device;
 420         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 421         unsigned long addr;
 422         int ret;
 423
 424         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
 425         /* Set address in the display registers */
 426         osd_device->ops.start_layer(osd_device,
 427                                     layer->layer_info.id,
 428                                     addr,
 429                                     disp_dev->cbcr_ofst);
 430
 431         ret = osd_device->ops.enable_layer(osd_device,
 432                                 layer->layer_info.id, 0);
 433         if (ret < 0) {
 434                 v4l2_err(&vpbe_dev->v4l2_dev,
 435                         "Error in enabling osd window layer 0\n");
 436                 return -1;
 437         }
 438
 439         /* Enable the window */
 440         layer->layer_info.enable = 1;
 441         if (cfg->pixfmt == PIXFMT_NV12) {
 442                 struct vpbe_layer *otherlayer =
 443                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 444
 445                 ret = osd_device->ops.enable_layer(osd_device,
 446                                 otherlayer->layer_info.id, 1);
 447                 if (ret < 0) {
 448                         v4l2_err(&vpbe_dev->v4l2_dev,
 449                                 "Error in enabling osd window layer 1\n");
 450                         return -1;
 451                 }
 452                 otherlayer->layer_info.enable = 1;
 453         }
 454         return 0;
 455 }
 456
 457 static void
 458 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 459                         struct vpbe_layer *layer,
 460                         int expected_xsize, int expected_ysize)
 461 {
 462         struct display_layer_info *layer_info = &layer->layer_info;
 463         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 464         struct osd_layer_config *cfg  = &layer->layer_info.config;
 465         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 466         int calculated_xsize;
 467         int h_exp = 0;
 468         int v_exp = 0;
 469         int h_scale;
 470         int v_scale;
 471
 472         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 473
 474         /*
 475          * Application initially set the image format. Current display
 476          * size is obtained from the vpbe display controller. expected_xsize
 477          * and expected_ysize are set through S_CROP ioctl. Based on this,
 478          * driver will calculate the scale factors for vertical and
 479          * horizontal direction so that the image is displayed scaled
 480          * and expanded. Application uses expansion to display the image
 481          * in a square pixel. Otherwise it is displayed using displays
 482          * pixel aspect ratio.It is expected that application chooses
 483          * the crop coordinates for cropped or scaled display. if crop
 484          * size is less than the image size, it is displayed cropped or
 485          * it is displayed scaled and/or expanded.
 486          *
 487          * to begin with, set the crop window same as expected. Later we
 488          * will override with scaled window size
 489          */
 490
 491         cfg->xsize = pixfmt->width;
 492         cfg->ysize = pixfmt->height;
 493         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 494         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 495         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 496         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 497
 498         if (pixfmt->width < expected_xsize) {
 499                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 500                 if (h_scale < 2)
 501                         h_scale = 1;
 502                 else if (h_scale >= 4)
 503                         h_scale = 4;
 504                 else
 505                         h_scale = 2;
 506                 cfg->xsize *= h_scale;
 507                 if (cfg->xsize < expected_xsize) {
 508                         if ((standard_id & V4L2_STD_525_60) ||
 509                         (standard_id & V4L2_STD_625_50)) {
 510                                 calculated_xsize = (cfg->xsize *
 511                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 512                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 513                                 if (calculated_xsize <= expected_xsize) {
 514                                         h_exp = 1;
 515                                         cfg->xsize = calculated_xsize;
 516                                 }
 517                         }
 518                 }
 519                 if (h_scale == 2)
 520                         layer_info->h_zoom = ZOOM_X2;
 521                 else if (h_scale == 4)
 522                         layer_info->h_zoom = ZOOM_X4;
 523                 if (h_exp)
 524                         layer_info->h_exp = H_EXP_9_OVER_8;
 525         } else {
 526                 /* no scaling, only cropping. Set display area to crop area */
 527                 cfg->xsize = expected_xsize;
 528         }
 529
 530         if (pixfmt->height < expected_ysize) {
 531                 v_scale = expected_ysize / pixfmt->height;
 532                 if (v_scale < 2)
 533                         v_scale = 1;
 534                 else if (v_scale >= 4)
 535                         v_scale = 4;
 536                 else
 537                         v_scale = 2;
 538                 cfg->ysize *= v_scale;
 539                 if (cfg->ysize < expected_ysize) {
 540                         if ((standard_id & V4L2_STD_625_50)) {
 541                                 calculated_xsize = (cfg->ysize *
 542                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 543                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 544                                 if (calculated_xsize <= expected_ysize) {
 545                                         v_exp = 1;
 546                                         cfg->ysize = calculated_xsize;
 547                                 }
 548                         }
 549                 }
 550                 if (v_scale == 2)
 551                         layer_info->v_zoom = ZOOM_X2;
 552                 else if (v_scale == 4)
 553                         layer_info->v_zoom = ZOOM_X4;
 554                 if (v_exp)
 555                         layer_info->h_exp = V_EXP_6_OVER_5;
 556         } else {
 557                 /* no scaling, only cropping. Set display area to crop area */
 558                 cfg->ysize = expected_ysize;
 559         }
 560         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 561                 "crop display xsize = %d, ysize = %d\n",
 562                 cfg->xsize, cfg->ysize);
 563 }
 564
 565 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 566                         struct vpbe_layer *layer,
 567                         int top, int left)
 568 {
 569         struct osd_layer_config *cfg = &layer->layer_info.config;
 570         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 571
 572         cfg->xpos = min((unsigned int)left,
 573                         vpbe_dev->current_timings.xres - cfg->xsize);
 574         cfg->ypos = min((unsigned int)top,
 575                         vpbe_dev->current_timings.yres - cfg->ysize);
 576
 577         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 578                 "new xpos = %d, ypos = %d\n",
 579                 cfg->xpos, cfg->ypos);
 580 }
 581
 582 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 583                         struct v4l2_rect *c)
 584 {
 585         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 586
 587         if ((c->width == 0) ||
 588           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 589                 c->width = vpbe_dev->current_timings.xres - c->left;
 590
 591         if ((c->height == 0) || ((c->height + c->top) >
 592           vpbe_dev->current_timings.yres))
 593                 c->height = vpbe_dev->current_timings.yres - c->top;
 594
 595         /* window height must be even for interlaced display */
 596         if (vpbe_dev->current_timings.interlaced)
 597                 c->height &= (~0x01);
 598
 599 }
 600
 601 /**
 602  * vpbe_try_format()
 603  * If user application provides width and height, and have bytesperline set
 604  * to zero, driver calculates bytesperline and sizeimage based on hardware
 605  * limits.
 606  */
 607 static int vpbe_try_format(struct vpbe_display *disp_dev,
 608                         struct v4l2_pix_format *pixfmt, int check)
 609 {
 610         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 611         int min_height = 1;
 612         int min_width = 32;
 613         int max_height;
 614         int max_width;
 615         int bpp;
 616
 617         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 618             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 619                 /* choose default as V4L2_PIX_FMT_UYVY */
 620                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 621
 622         /* Check the field format */
 623         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 624                 (pixfmt->field != V4L2_FIELD_NONE)) {
 625                 if (vpbe_dev->current_timings.interlaced)
 626                         pixfmt->field = V4L2_FIELD_INTERLACED;
 627                 else
 628                         pixfmt->field = V4L2_FIELD_NONE;
 629         }
 630
 631         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 632                 min_height = 2;
 633
 634         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 635                 bpp = 1;
 636         else
 637                 bpp = 2;
 638
 639         max_width = vpbe_dev->current_timings.xres;
 640         max_height = vpbe_dev->current_timings.yres;
 641
 642         min_width /= bpp;
 643
 644         if (!pixfmt->width || (pixfmt->width < min_width) ||
 645                 (pixfmt->width > max_width)) {
 646                 pixfmt->width = vpbe_dev->current_timings.xres;
 647         }
 648
 649         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 650                 (pixfmt->height  > max_height)) {
 651                 pixfmt->height = vpbe_dev->current_timings.yres;
 652         }
 653
 654         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 655                 pixfmt->bytesperline = pixfmt->width * bpp;
 656
 657         /* Make the bytesperline 32 byte aligned */
 658         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 659
 660         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 661                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 662                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 663         else
 664                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 665
 666         return 0;
 667 }
 668
 669 static int vpbe_display_g_priority(struct file *file, void *priv,
 670                                 enum v4l2_priority *p)
 671 {
 672         struct vpbe_fh *fh = file->private_data;
 673         struct vpbe_layer *layer = fh->layer;
 674
 675         *p = v4l2_prio_max(&layer->prio);
 676
 677         return 0;
 678 }
 679
 680 static int vpbe_display_s_priority(struct file *file, void *priv,
 681                                 enum v4l2_priority p)
 682 {
 683         struct vpbe_fh *fh = file->private_data;
 684         struct vpbe_layer *layer = fh->layer;
 685         int ret;
 686
 687         ret = v4l2_prio_change(&layer->prio, &fh->prio, p);
 688
 689         return ret;
 690 }
 691
 692 static int vpbe_display_querycap(struct file *file, void  *priv,
 693                                struct v4l2_capability *cap)
 694 {
 695         struct vpbe_fh *fh = file->private_data;
 696         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 697
 698         cap->version = VPBE_DISPLAY_VERSION_CODE;
 699         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 700         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 701         snprintf(cap->driver, sizeof(cap->driver), "%s",
 702                 dev_name(vpbe_dev->pdev));
 703         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 704                  dev_name(vpbe_dev->pdev));
 705         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 706
 707         return 0;
 708 }
 709
 710 static int vpbe_display_s_crop(struct file *file, void *priv,
 711                              const struct v4l2_crop *crop)
 712 {
 713         struct vpbe_fh *fh = file->private_data;
 714         struct vpbe_layer *layer = fh->layer;
 715         struct vpbe_display *disp_dev = fh->disp_dev;
 716         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 717         struct osd_layer_config *cfg = &layer->layer_info.config;
 718         struct osd_state *osd_device = disp_dev->osd_device;
 719         struct v4l2_rect rect = crop->c;
 720         int ret;
 721
 722         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 723                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 724
 725         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 726                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 727                 return -EINVAL;
 728         }
 729
 730         if (rect.top < 0)
 731                 rect.top = 0;
 732         if (rect.left < 0)
 733                 rect.left = 0;
 734
 735         vpbe_disp_check_window_params(disp_dev, &rect);
 736
 737         osd_device->ops.get_layer_config(osd_device,
 738                         layer->layer_info.id, cfg);
 739
 740         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 741                                         rect.width,
 742                                         rect.height);
 743         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 744                                         rect.left);
 745         ret = osd_device->ops.set_layer_config(osd_device,
 746                                 layer->layer_info.id, cfg);
 747         if (ret < 0) {
 748                 v4l2_err(&vpbe_dev->v4l2_dev,
 749                         "Error in set layer config:\n");
 750                 return -EINVAL;
 751         }
 752
 753         /* apply zooming and h or v expansion */
 754         osd_device->ops.set_zoom(osd_device,
 755                         layer->layer_info.id,
 756                         layer->layer_info.h_zoom,
 757                         layer->layer_info.v_zoom);
 758         ret = osd_device->ops.set_vid_expansion(osd_device,
 759                         layer->layer_info.h_exp,
 760                         layer->layer_info.v_exp);
 761         if (ret < 0) {
 762                 v4l2_err(&vpbe_dev->v4l2_dev,
 763                 "Error in set vid expansion:\n");
 764                 return -EINVAL;
 765         }
 766
 767         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 768                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 769                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 770                 (layer->layer_info.v_exp != V_EXP_OFF))
 771                 /* Enable expansion filter */
 772                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 773         else
 774                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 775
 776         return 0;
 777 }
 778
 779 static int vpbe_display_g_crop(struct file *file, void *priv,
 780                              struct v4l2_crop *crop)
 781 {
 782         struct vpbe_fh *fh = file->private_data;
 783         struct vpbe_layer *layer = fh->layer;
 784         struct osd_layer_config *cfg = &layer->layer_info.config;
 785         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 786         struct osd_state *osd_device = fh->disp_dev->osd_device;
 787         struct v4l2_rect *rect = &crop->c;
 788
 789         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 790                         "VIDIOC_G_CROP, layer id = %d\n",
 791                         layer->device_id);
 792
 793         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 794                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 795                 return -EINVAL;
 796         }
 797         osd_device->ops.get_layer_config(osd_device,
 798                                 layer->layer_info.id, cfg);
 799         rect->top = cfg->ypos;
 800         rect->left = cfg->xpos;
 801         rect->width = cfg->xsize;
 802         rect->height = cfg->ysize;
 803
 804         return 0;
 805 }
 806
 807 static int vpbe_display_cropcap(struct file *file, void *priv,
 808                               struct v4l2_cropcap *cropcap)
 809 {
 810         struct vpbe_fh *fh = file->private_data;
 811         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 812
 813         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 814
 815         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 816         cropcap->bounds.left = 0;
 817         cropcap->bounds.top = 0;
 818         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 819         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 820         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 821         cropcap->defrect = cropcap->bounds;
 822         return 0;
 823 }
 824
 825 static int vpbe_display_g_fmt(struct file *file, void *priv,
 826                                 struct v4l2_format *fmt)
 827 {
 828         struct vpbe_fh *fh = file->private_data;
 829         struct vpbe_layer *layer = fh->layer;
 830         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 831
 832         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 833                         "VIDIOC_G_FMT, layer id = %d\n",
 834                         layer->device_id);
 835
 836         /* If buffer type is video output */
 837         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 838                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 839                 return -EINVAL;
 840         }
 841         /* Fill in the information about format */
 842         fmt->fmt.pix = layer->pix_fmt;
 843
 844         return 0;
 845 }
 846
 847 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 848                                    struct v4l2_fmtdesc *fmt)
 849 {
 850         struct vpbe_fh *fh = file->private_data;
 851         struct vpbe_layer *layer = fh->layer;
 852         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 853         unsigned int index = 0;
 854
 855         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 856                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 857                                 layer->device_id);
 858         if (fmt->index > 1) {
 859                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 860                 return -EINVAL;
 861         }
 862
 863         /* Fill in the information about format */
 864         index = fmt->index;
 865         memset(fmt, 0, sizeof(*fmt));
 866         fmt->index = index;
 867         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 868         if (index == 0) {
 869                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 870                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 871         } else {
 872                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 873                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static int vpbe_display_s_fmt(struct file *file, void *priv,
 880                                 struct v4l2_format *fmt)
 881 {
 882         struct vpbe_fh *fh = file->private_data;
 883         struct vpbe_layer *layer = fh->layer;
 884         struct vpbe_display *disp_dev = fh->disp_dev;
 885         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 886         struct osd_layer_config *cfg  = &layer->layer_info.config;
 887         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 888         struct osd_state *osd_device = disp_dev->osd_device;
 889         int ret;
 890
 891         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 892                         "VIDIOC_S_FMT, layer id = %d\n",
 893                         layer->device_id);
 894
 895         /* If streaming is started, return error */
 896         if (layer->started) {
 897                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 898                 return -EBUSY;
 899         }
 900         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 901                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 902                 return -EINVAL;
 903         }
 904         /* Check for valid pixel format */
 905         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 906         if (ret)
 907                 return ret;
 908
 909         /* YUV420 is requested, check availability of the
 910         other video window */
 911
 912         layer->pix_fmt = *pixfmt;
 913         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
 914                 struct vpbe_layer *otherlayer;
 915
 916                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
 917                 /* if other layer is available, only
 918                  * claim it, do not configure it
 919                  */
 920                 ret = osd_device->ops.request_layer(osd_device,
 921                                                     otherlayer->layer_info.id);
 922                 if (ret < 0) {
 923                         v4l2_err(&vpbe_dev->v4l2_dev,
 924                                  "Display Manager failed to allocate layer\n");
 925                         return -EBUSY;
 926                 }
 927         }
 928
 929         /* Get osd layer config */
 930         osd_device->ops.get_layer_config(osd_device,
 931                         layer->layer_info.id, cfg);
 932         /* Store the pixel format in the layer object */
 933         cfg->xsize = pixfmt->width;
 934         cfg->ysize = pixfmt->height;
 935         cfg->line_length = pixfmt->bytesperline;
 936         cfg->ypos = 0;
 937         cfg->xpos = 0;
 938         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 939
 940         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 941                 cfg->pixfmt = PIXFMT_YCBCRI;
 942
 943         /* Change of the default pixel format for both video windows */
 944         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 945                 struct vpbe_layer *otherlayer;
 946                 cfg->pixfmt = PIXFMT_NV12;
 947                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 948                                                                 layer);
 949                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 950         }
 951
 952         /* Set the layer config in the osd window */
 953         ret = osd_device->ops.set_layer_config(osd_device,
 954                                 layer->layer_info.id, cfg);
 955         if (ret < 0) {
 956                 v4l2_err(&vpbe_dev->v4l2_dev,
 957                                 "Error in S_FMT params:\n");
 958                 return -EINVAL;
 959         }
 960
 961         /* Readback and fill the local copy of current pix format */
 962         osd_device->ops.get_layer_config(osd_device,
 963                         layer->layer_info.id, cfg);
 964
 965         return 0;
 966 }
 967
 968 static int vpbe_display_try_fmt(struct file *file, void *priv,
 969                                   struct v4l2_format *fmt)
 970 {
 971         struct vpbe_fh *fh = file->private_data;
 972         struct vpbe_display *disp_dev = fh->disp_dev;
 973         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 974         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 975
 976         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 977
 978         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 979                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 980                 return -EINVAL;
 981         }
 982
 983         /* Check for valid field format */
 984         return  vpbe_try_format(disp_dev, pixfmt, 0);
 985
 986 }
 987
 988 /**
 989  * vpbe_display_s_std - Set the given standard in the encoder
 990  *
 991  * Sets the standard if supported by the current encoder. Return the status.
 992  * 0 - success & -EINVAL on error
 993  */
 994 static int vpbe_display_s_std(struct file *file, void *priv,
 995                                 v4l2_std_id std_id)
 996 {
 997         struct vpbe_fh *fh = priv;
 998         struct vpbe_layer *layer = fh->layer;
 999         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1000         int ret;
1001
1002         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
1003
1004         /* If streaming is started, return error */
1005         if (layer->started) {
1006                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1007                 return -EBUSY;
1008         }
1009         if (NULL != vpbe_dev->ops.s_std) {
1010                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1011                 if (ret) {
1012                         v4l2_err(&vpbe_dev->v4l2_dev,
1013                         "Failed to set standard for sub devices\n");
1014                         return -EINVAL;
1015                 }
1016         } else {
1017                 return -EINVAL;
1018         }
1019
1020         return 0;
1021 }
1022
1023 /**
1024  * vpbe_display_g_std - Get the standard in the current encoder
1025  *
1026  * Get the standard in the current encoder. Return the status. 0 - success
1027  * -EINVAL on error
1028  */
1029 static int vpbe_display_g_std(struct file *file, void *priv,
1030                                 v4l2_std_id *std_id)
1031 {
1032         struct vpbe_fh *fh = priv;
1033         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1034
1035         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1036
1037         /* Get the standard from the current encoder */
1038         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1039                 *std_id = vpbe_dev->current_timings.std_id;
1040                 return 0;
1041         }
1042
1043         return -EINVAL;
1044 }
1045
1046 /**
1047  * vpbe_display_enum_output - enumerate outputs
1048  *
1049  * Enumerates the outputs available at the vpbe display
1050  * returns the status, -EINVAL if end of output list
1051  */
1052 static int vpbe_display_enum_output(struct file *file, void *priv,
1053                                     struct v4l2_output *output)
1054 {
1055         struct vpbe_fh *fh = priv;
1056         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1057         int ret;
1058
1059         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1060
1061         /* Enumerate outputs */
1062
1063         if (NULL == vpbe_dev->ops.enum_outputs)
1064                 return -EINVAL;
1065
1066         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1067         if (ret) {
1068                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1069                         "Failed to enumerate outputs\n");
1070                 return -EINVAL;
1071         }
1072
1073         return 0;
1074 }
1075
1076 /**
1077  * vpbe_display_s_output - Set output to
1078  * the output specified by the index
1079  */
1080 static int vpbe_display_s_output(struct file *file, void *priv,
1081                                 unsigned int i)
1082 {
1083         struct vpbe_fh *fh = priv;
1084         struct vpbe_layer *layer = fh->layer;
1085         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1086         int ret;
1087
1088         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1089         /* If streaming is started, return error */
1090         if (layer->started) {
1091                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1092                 return -EBUSY;
1093         }
1094         if (NULL == vpbe_dev->ops.set_output)
1095                 return -EINVAL;
1096
1097         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1098         if (ret) {
1099                 v4l2_err(&vpbe_dev->v4l2_dev,
1100                         "Failed to set output for sub devices\n");
1101                 return -EINVAL;
1102         }
1103
1104         return 0;
1105 }
1106
1107 /**
1108  * vpbe_display_g_output - Get output from subdevice
1109  * for a given by the index
1110  */
1111 static int vpbe_display_g_output(struct file *file, void *priv,
1112                                 unsigned int *i)
1113 {
1114         struct vpbe_fh *fh = priv;
1115         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1116
1117         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1118         /* Get the standard from the current encoder */
1119         *i = vpbe_dev->current_out_index;
1120
1121         return 0;
1122 }
1123
1124 /**
1125  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1126  *
1127  * enum the timings in the current encoder. Return the status. 0 - success
1128  * -EINVAL on error
1129  */
1130 static int
1131 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1132                         struct v4l2_enum_dv_timings *timings)
1133 {
1134         struct vpbe_fh *fh = priv;
1135         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1136         int ret;
1137
1138         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1139
1140         /* Enumerate outputs */
1141         if (NULL == vpbe_dev->ops.enum_dv_timings)
1142                 return -EINVAL;
1143
1144         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1145         if (ret) {
1146                 v4l2_err(&vpbe_dev->v4l2_dev,
1147                         "Failed to enumerate dv timings info\n");
1148                 return -EINVAL;
1149         }
1150
1151         return 0;
1152 }
1153
1154 /**
1155  * vpbe_display_s_dv_timings - Set the dv timings
1156  *
1157  * Set the timings in the current encoder. Return the status. 0 - success
1158  * -EINVAL on error
1159  */
1160 static int
1161 vpbe_display_s_dv_timings(struct file *file, void *priv,
1162                                 struct v4l2_dv_timings *timings)
1163 {
1164         struct vpbe_fh *fh = priv;
1165         struct vpbe_layer *layer = fh->layer;
1166         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1167         int ret;
1168
1169         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1170
1171
1172         /* If streaming is started, return error */
1173         if (layer->started) {
1174                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1175                 return -EBUSY;
1176         }
1177
1178         /* Set the given standard in the encoder */
1179         if (!vpbe_dev->ops.s_dv_timings)
1180                 return -EINVAL;
1181
1182         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1183         if (ret) {
1184                 v4l2_err(&vpbe_dev->v4l2_dev,
1185                         "Failed to set the dv timings info\n");
1186                 return -EINVAL;
1187         }
1188
1189         return 0;
1190 }
1191
1192 /**
1193  * vpbe_display_g_dv_timings - Set the dv timings
1194  *
1195  * Get the timings in the current encoder. Return the status. 0 - success
1196  * -EINVAL on error
1197  */
1198 static int
1199 vpbe_display_g_dv_timings(struct file *file, void *priv,
1200                                 struct v4l2_dv_timings *dv_timings)
1201 {
1202         struct vpbe_fh *fh = priv;
1203         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1204
1205         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1206
1207         /* Get the given standard in the encoder */
1208
1209         if (vpbe_dev->current_timings.timings_type &
1210                                 VPBE_ENC_DV_TIMINGS) {
1211                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1212         } else {
1213                 return -EINVAL;
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int vpbe_display_streamoff(struct file *file, void *priv,
1220                                 enum v4l2_buf_type buf_type)
1221 {
1222         struct vpbe_fh *fh = file->private_data;
1223         struct vpbe_layer *layer = fh->layer;
1224         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1225         struct osd_state *osd_device = fh->disp_dev->osd_device;
1226         int ret;
1227
1228         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1229                         "VIDIOC_STREAMOFF,layer id = %d\n",
1230                         layer->device_id);
1231
1232         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1233                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1234                 return -EINVAL;
1235         }
1236
1237         /* If io is allowed for this file handle, return error */
1238         if (!fh->io_allowed) {
1239                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1240                 return -EACCES;
1241         }
1242
1243         /* If streaming is not started, return error */
1244         if (!layer->started) {
1245                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1246                         " id = %d\n", layer->device_id);
1247                 return -EINVAL;
1248         }
1249
1250         osd_device->ops.disable_layer(osd_device,
1251                         layer->layer_info.id);
1252         layer->started = 0;
1253         ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1254
1255         return ret;
1256 }
1257
1258 static int vpbe_display_streamon(struct file *file, void *priv,
1259                          enum v4l2_buf_type buf_type)
1260 {
1261         struct vpbe_fh *fh = file->private_data;
1262         struct vpbe_layer *layer = fh->layer;
1263         struct vpbe_display *disp_dev = fh->disp_dev;
1264         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1265         struct osd_state *osd_device = disp_dev->osd_device;
1266         int ret;
1267
1268         osd_device->ops.disable_layer(osd_device,
1269                         layer->layer_info.id);
1270
1271         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1272                                                 layer->device_id);
1273
1274         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1275                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1276                 return -EINVAL;
1277         }
1278
1279         /* If file handle is not allowed IO, return error */
1280         if (!fh->io_allowed) {
1281                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1282                 return -EACCES;
1283         }
1284         /* If Streaming is already started, return error */
1285         if (layer->started) {
1286                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1287                 return -EBUSY;
1288         }
1289
1290         /*
1291          * Call vb2_streamon to start streaming
1292          * in videobuf
1293          */
1294         ret = vb2_streamon(&layer->buffer_queue, buf_type);
1295         if (ret) {
1296                 v4l2_err(&vpbe_dev->v4l2_dev,
1297                 "error in vb2_streamon\n");
1298                 return ret;
1299         }
1300         return ret;
1301 }
1302
1303 static int vpbe_display_dqbuf(struct file *file, void *priv,
1304                       struct v4l2_buffer *buf)
1305 {
1306         struct vpbe_fh *fh = file->private_data;
1307         struct vpbe_layer *layer = fh->layer;
1308         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1309         int ret;
1310
1311         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1312                 "VIDIOC_DQBUF, layer id = %d\n",
1313                 layer->device_id);
1314
1315         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1316                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1317                 return -EINVAL;
1318         }
1319         /* If this file handle is not allowed to do IO, return error */
1320         if (!fh->io_allowed) {
1321                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1322                 return -EACCES;
1323         }
1324         if (file->f_flags & O_NONBLOCK)
1325                 /* Call videobuf_dqbuf for non blocking mode */
1326                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1327         else
1328                 /* Call videobuf_dqbuf for blocking mode */
1329                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1330
1331         return ret;
1332 }
1333
1334 static int vpbe_display_qbuf(struct file *file, void *priv,
1335                      struct v4l2_buffer *p)
1336 {
1337         struct vpbe_fh *fh = file->private_data;
1338         struct vpbe_layer *layer = fh->layer;
1339         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1340
1341         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1342                 "VIDIOC_QBUF, layer id = %d\n",
1343                 layer->device_id);
1344
1345         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1346                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1347                 return -EINVAL;
1348         }
1349
1350         /* If this file handle is not allowed to do IO, return error */
1351         if (!fh->io_allowed) {
1352                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1353                 return -EACCES;
1354         }
1355
1356         return vb2_qbuf(&layer->buffer_queue, p);
1357 }
1358
1359 static int vpbe_display_querybuf(struct file *file, void *priv,
1360                          struct v4l2_buffer *buf)
1361 {
1362         struct vpbe_fh *fh = file->private_data;
1363         struct vpbe_layer *layer = fh->layer;
1364         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1365
1366         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1367                 "VIDIOC_QUERYBUF, layer id = %d\n",
1368                 layer->device_id);
1369
1370         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1371                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1372                 return -EINVAL;
1373         }
1374         /* Call vb2_querybuf to get information */
1375         return vb2_querybuf(&layer->buffer_queue, buf);
1376 }
1377
1378 static int vpbe_display_reqbufs(struct file *file, void *priv,
1379                         struct v4l2_requestbuffers *req_buf)
1380 {
1381         struct vpbe_fh *fh = file->private_data;
1382         struct vpbe_layer *layer = fh->layer;
1383         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1384         struct vb2_queue *q;
1385         int ret;
1386         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1387
1388         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1389                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1390                 return -EINVAL;
1391         }
1392
1393         /* If io users of the layer is not zero, return error */
1394         if (0 != layer->io_usrs) {
1395                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1396                 return -EBUSY;
1397         }
1398         /* Initialize videobuf queue as per the buffer type */
1399         layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1400         if (IS_ERR(layer->alloc_ctx)) {
1401                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1402                 return PTR_ERR(layer->alloc_ctx);
1403         }
1404         q = &layer->buffer_queue;
1405         memset(q, 0, sizeof(*q));
1406         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1407         q->io_modes = VB2_MMAP | VB2_USERPTR;
1408         q->drv_priv = fh;
1409         q->ops = &video_qops;
1410         q->mem_ops = &vb2_dma_contig_memops;
1411         q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1412         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1413         q->min_buffers_needed = 1;
1414
1415         ret = vb2_queue_init(q);
1416         if (ret) {
1417                 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1418                 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1419                 return ret;
1420         }
1421         /* Set io allowed member of file handle to TRUE */
1422         fh->io_allowed = 1;
1423         /* Increment io usrs member of layer object to 1 */
1424         layer->io_usrs = 1;
1425         /* Store type of memory requested in layer object */
1426         layer->memory = req_buf->memory;
1427         /* Initialize buffer queue */
1428         INIT_LIST_HEAD(&layer->dma_queue);
1429         /* Allocate buffers */
1430         return vb2_reqbufs(q, req_buf);
1431 }
1432
1433 /*
1434  * vpbe_display_mmap()
1435  * It is used to map kernel space buffers into user spaces
1436  */
1437 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1438 {
1439         /* Get the layer object and file handle object */
1440         struct vpbe_fh *fh = filep->private_data;
1441         struct vpbe_layer *layer = fh->layer;
1442         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1443         int ret;
1444
1445         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1446
1447         if (mutex_lock_interruptible(&layer->opslock))
1448                 return -ERESTARTSYS;
1449         ret = vb2_mmap(&layer->buffer_queue, vma);
1450         mutex_unlock(&layer->opslock);
1451         return ret;
1452 }
1453
1454 /* vpbe_display_poll(): It is used for select/poll system call
1455  */
1456 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1457 {
1458         struct vpbe_fh *fh = filep->private_data;
1459         struct vpbe_layer *layer = fh->layer;
1460         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1461         unsigned int err = 0;
1462
1463         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1464         if (layer->started) {
1465                 mutex_lock(&layer->opslock);
1466                 err = vb2_poll(&layer->buffer_queue, filep, wait);
1467                 mutex_unlock(&layer->opslock);
1468         }
1469         return err;
1470 }
1471
1472 /*
1473  * vpbe_display_open()
1474  * It creates object of file handle structure and stores it in private_data
1475  * member of filepointer
1476  */
1477 static int vpbe_display_open(struct file *file)
1478 {
1479         struct vpbe_fh *fh = NULL;
1480         struct vpbe_layer *layer = video_drvdata(file);
1481         struct vpbe_display *disp_dev = layer->disp_dev;
1482         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1483         struct osd_state *osd_device = disp_dev->osd_device;
1484         int err;
1485
1486         /* Allocate memory for the file handle object */
1487         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1488         if (fh == NULL) {
1489                 v4l2_err(&vpbe_dev->v4l2_dev,
1490                         "unable to allocate memory for file handle object\n");
1491                 return -ENOMEM;
1492         }
1493         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1494                         "vpbe display open plane = %d\n",
1495                         layer->device_id);
1496
1497         /* store pointer to fh in private_data member of filep */
1498         file->private_data = fh;
1499         fh->layer = layer;
1500         fh->disp_dev = disp_dev;
1501
1502         if (!layer->usrs) {
1503                 if (mutex_lock_interruptible(&layer->opslock))
1504                         return -ERESTARTSYS;
1505                 /* First claim the layer for this device */
1506                 err = osd_device->ops.request_layer(osd_device,
1507                                                 layer->layer_info.id);
1508                 mutex_unlock(&layer->opslock);
1509                 if (err < 0) {
1510                         /* Couldn't get layer */
1511                         v4l2_err(&vpbe_dev->v4l2_dev,
1512                                 "Display Manager failed to allocate layer\n");
1513                         kfree(fh);
1514                         return -EINVAL;
1515                 }
1516         }
1517         /* Increment layer usrs counter */
1518         layer->usrs++;
1519         /* Set io_allowed member to false */
1520         fh->io_allowed = 0;
1521         /* Initialize priority of this instance to default priority */
1522         fh->prio = V4L2_PRIORITY_UNSET;
1523         v4l2_prio_open(&layer->prio, &fh->prio);
1524         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1525                         "vpbe display device opened successfully\n");
1526         return 0;
1527 }
1528
1529 /*
1530  * vpbe_display_release()
1531  * This function deletes buffer queue, frees the buffers and the davinci
1532  * display file * handle
1533  */
1534 static int vpbe_display_release(struct file *file)
1535 {
1536         /* Get the layer object and file handle object */
1537         struct vpbe_fh *fh = file->private_data;
1538         struct vpbe_layer *layer = fh->layer;
1539         struct osd_layer_config *cfg  = &layer->layer_info.config;
1540         struct vpbe_display *disp_dev = fh->disp_dev;
1541         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1542         struct osd_state *osd_device = disp_dev->osd_device;
1543
1544         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1545
1546         mutex_lock(&layer->opslock);
1547         /* if this instance is doing IO */
1548         if (fh->io_allowed) {
1549                 /* Reset io_usrs member of layer object */
1550                 layer->io_usrs = 0;
1551
1552                 osd_device->ops.disable_layer(osd_device,
1553                                 layer->layer_info.id);
1554                 layer->started = 0;
1555                 /* Free buffers allocated */
1556                 vb2_queue_release(&layer->buffer_queue);
1557                 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1558         }
1559
1560         /* Decrement layer usrs counter */
1561         layer->usrs--;
1562         /* If this file handle has initialize encoder device, reset it */
1563         if (!layer->usrs) {
1564                 if (cfg->pixfmt == PIXFMT_NV12) {
1565                         struct vpbe_layer *otherlayer;
1566                         otherlayer =
1567                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1568                         osd_device->ops.disable_layer(osd_device,
1569                                         otherlayer->layer_info.id);
1570                         osd_device->ops.release_layer(osd_device,
1571                                         otherlayer->layer_info.id);
1572                 }
1573                 osd_device->ops.disable_layer(osd_device,
1574                                 layer->layer_info.id);
1575                 osd_device->ops.release_layer(osd_device,
1576                                 layer->layer_info.id);
1577         }
1578         /* Close the priority */
1579         v4l2_prio_close(&layer->prio, fh->prio);
1580         file->private_data = NULL;
1581         mutex_unlock(&layer->opslock);
1582
1583         /* Free memory allocated to file handle object */
1584         kfree(fh);
1585
1586         disp_dev->cbcr_ofst = 0;
1587
1588         return 0;
1589 }
1590
1591 /* vpbe capture ioctl operations */
1592 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1593         .vidioc_querycap         = vpbe_display_querycap,
1594         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1595         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1596         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1597         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1598         .vidioc_reqbufs          = vpbe_display_reqbufs,
1599         .vidioc_querybuf         = vpbe_display_querybuf,
1600         .vidioc_qbuf             = vpbe_display_qbuf,
1601         .vidioc_dqbuf            = vpbe_display_dqbuf,
1602         .vidioc_streamon         = vpbe_display_streamon,
1603         .vidioc_streamoff        = vpbe_display_streamoff,
1604         .vidioc_cropcap          = vpbe_display_cropcap,
1605         .vidioc_g_crop           = vpbe_display_g_crop,
1606         .vidioc_s_crop           = vpbe_display_s_crop,
1607         .vidioc_g_priority       = vpbe_display_g_priority,
1608         .vidioc_s_priority       = vpbe_display_s_priority,
1609         .vidioc_s_std            = vpbe_display_s_std,
1610         .vidioc_g_std            = vpbe_display_g_std,
1611         .vidioc_enum_output      = vpbe_display_enum_output,
1612         .vidioc_s_output         = vpbe_display_s_output,
1613         .vidioc_g_output         = vpbe_display_g_output,
1614         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1615         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1616         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1617 };
1618
1619 static struct v4l2_file_operations vpbe_fops = {
1620         .owner = THIS_MODULE,
1621         .open = vpbe_display_open,
1622         .release = vpbe_display_release,
1623         .unlocked_ioctl = video_ioctl2,
1624         .mmap = vpbe_display_mmap,
1625         .poll = vpbe_display_poll
1626 };
1627
1628 static int vpbe_device_get(struct device *dev, void *data)
1629 {
1630         struct platform_device *pdev = to_platform_device(dev);
1631         struct vpbe_display *vpbe_disp  = data;
1632
1633         if (strcmp("vpbe_controller", pdev->name) == 0)
1634                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1635
1636         if (strstr(pdev->name, "vpbe-osd") != NULL)
1637                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1638
1639         return 0;
1640 }
1641
1642 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1643                            struct platform_device *pdev)
1644 {
1645         struct vpbe_layer *vpbe_display_layer = NULL;
1646         struct video_device *vbd = NULL;
1647
1648         /* Allocate memory for four plane display objects */
1649
1650         disp_dev->dev[i] =
1651                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1652
1653         /* If memory allocation fails, return error */
1654         if (!disp_dev->dev[i]) {
1655                 printk(KERN_ERR "ran out of memory\n");
1656                 return  -ENOMEM;
1657         }
1658         spin_lock_init(&disp_dev->dev[i]->irqlock);
1659         mutex_init(&disp_dev->dev[i]->opslock);
1660
1661         /* Get the pointer to the layer object */
1662         vpbe_display_layer = disp_dev->dev[i];
1663         vbd = &vpbe_display_layer->video_dev;
1664         /* Initialize field of video device */
1665         vbd->release    = video_device_release_empty;
1666         vbd->fops       = &vpbe_fops;
1667         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1668         vbd->minor      = -1;
1669         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1670         vbd->lock       = &vpbe_display_layer->opslock;
1671         vbd->vfl_dir    = VFL_DIR_TX;
1672
1673         if (disp_dev->vpbe_dev->current_timings.timings_type &
1674                         VPBE_ENC_STD)
1675                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1676
1677         snprintf(vbd->name, sizeof(vbd->name),
1678                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1679                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1680                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1681                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1682
1683         vpbe_display_layer->device_id = i;
1684
1685         vpbe_display_layer->layer_info.id =
1686                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1687
1688         /* Initialize prio member of layer object */
1689         v4l2_prio_init(&vpbe_display_layer->prio);
1690
1691         return 0;
1692 }
1693
1694 static int register_device(struct vpbe_layer *vpbe_display_layer,
1695                            struct vpbe_display *disp_dev,
1696                            struct platform_device *pdev)
1697 {
1698         int err;
1699
1700         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1701                   "Trying to register VPBE display device.\n");
1702         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1703                   "layer=%x,layer->video_dev=%x\n",
1704                   (int)vpbe_display_layer,
1705                   (int)&vpbe_display_layer->video_dev);
1706
1707         err = video_register_device(&vpbe_display_layer->video_dev,
1708                                     VFL_TYPE_GRABBER,
1709                                     -1);
1710         if (err)
1711                 return -ENODEV;
1712
1713         vpbe_display_layer->disp_dev = disp_dev;
1714         /* set the driver data in platform device */
1715         platform_set_drvdata(pdev, disp_dev);
1716         video_set_drvdata(&vpbe_display_layer->video_dev,
1717                           vpbe_display_layer);
1718
1719         return 0;
1720 }
1721
1722
1723
1724 /*
1725  * vpbe_display_probe()
1726  * This function creates device entries by register itself to the V4L2 driver
1727  * and initializes fields of each layer objects
1728  */
1729 static int vpbe_display_probe(struct platform_device *pdev)
1730 {
1731         struct vpbe_layer *vpbe_display_layer;
1732         struct vpbe_display *disp_dev;
1733         struct resource *res = NULL;
1734         int k;
1735         int i;
1736         int err;
1737         int irq;
1738
1739         printk(KERN_DEBUG "vpbe_display_probe\n");
1740         /* Allocate memory for vpbe_display */
1741         disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1742                                 GFP_KERNEL);
1743         if (!disp_dev)
1744                 return -ENOMEM;
1745
1746         spin_lock_init(&disp_dev->dma_queue_lock);
1747         /*
1748          * Scan all the platform devices to find the vpbe
1749          * controller device and get the vpbe_dev object
1750          */
1751         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1752                         vpbe_device_get);
1753         if (err < 0)
1754                 return err;
1755         /* Initialize the vpbe display controller */
1756         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1757                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1758                                                          disp_dev->vpbe_dev);
1759                 if (err) {
1760                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1761                                         "Error initing vpbe\n");
1762                         err = -ENOMEM;
1763                         goto probe_out;
1764                 }
1765         }
1766
1767         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1768                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1769                         err = -ENODEV;
1770                         goto probe_out;
1771                 }
1772         }
1773
1774         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1775         if (!res) {
1776                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1777                          "Unable to get VENC interrupt resource\n");
1778                 err = -ENODEV;
1779                 goto probe_out;
1780         }
1781
1782         irq = res->start;
1783         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
1784                                VPBE_DISPLAY_DRIVER, disp_dev);
1785         if (err) {
1786                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1787                                 "Unable to request interrupt\n");
1788                 goto probe_out;
1789         }
1790
1791         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1792                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1793                         err = -ENODEV;
1794                         goto probe_out;
1795                 }
1796         }
1797
1798         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1799         return 0;
1800
1801 probe_out:
1802         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1803                 /* Get the pointer to the layer object */
1804                 vpbe_display_layer = disp_dev->dev[k];
1805                 /* Unregister video device */
1806                 if (vpbe_display_layer) {
1807                         video_unregister_device(
1808                                 &vpbe_display_layer->video_dev);
1809                                 kfree(disp_dev->dev[k]);
1810                 }
1811         }
1812         return err;
1813 }
1814
1815 /*
1816  * vpbe_display_remove()
1817  * It un-register hardware layer from V4L2 driver
1818  */
1819 static int vpbe_display_remove(struct platform_device *pdev)
1820 {
1821         struct vpbe_layer *vpbe_display_layer;
1822         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1823         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1824         int i;
1825
1826         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1827
1828         /* deinitialize the vpbe display controller */
1829         if (NULL != vpbe_dev->ops.deinitialize)
1830                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1831         /* un-register device */
1832         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1833                 /* Get the pointer to the layer object */
1834                 vpbe_display_layer = disp_dev->dev[i];
1835                 /* Unregister video device */
1836                 video_unregister_device(&vpbe_display_layer->video_dev);
1837
1838         }
1839         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1840                 kfree(disp_dev->dev[i]);
1841                 disp_dev->dev[i] = NULL;
1842         }
1843
1844         return 0;
1845 }
1846
1847 static struct platform_driver vpbe_display_driver = {
1848         .driver = {
1849                 .name = VPBE_DISPLAY_DRIVER,
1850                 .owner = THIS_MODULE,
1851                 .bus = &platform_bus_type,
1852         },
1853         .probe = vpbe_display_probe,
1854         .remove = vpbe_display_remove,
1855 };
1856
1857 module_platform_driver(vpbe_display_driver);
1858
1859 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1860 MODULE_LICENSE("GPL");
1861 MODULE_AUTHOR("Texas Instruments");