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         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 345         int ret;
 346
 347         /* If buffer queue is empty, return error */
 348         if (list_empty(&layer->dma_queue)) {
 349                 v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
 350                 return -EINVAL;
 351         }
 352         /* Get the next frame from the buffer queue */
 353         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 354                                 struct vpbe_disp_buffer, list);
 355         /* Remove buffer from the buffer queue */
 356         list_del(&layer->cur_frm->list);
 357         /* Mark state of the current frame to active */
 358         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 359         /* Initialize field_id and started member */
 360         layer->field_id = 0;
 361
 362         /* Set parameters in OSD and VENC */
 363         ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
 364         if (ret < 0)
 365                 return ret;
 366
 367         /*
 368          * if request format is yuv420 semiplanar, need to
 369          * enable both video windows
 370          */
 371         layer->started = 1;
 372         layer->layer_first_int = 1;
 373
 374         return ret;
 375 }
 376
 377 static int vpbe_stop_streaming(struct vb2_queue *vq)
 378 {
 379         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 380         struct vpbe_layer *layer = fh->layer;
 381
 382         if (!vb2_is_streaming(vq))
 383                 return 0;
 384
 385         /* release all active buffers */
 386         while (!list_empty(&layer->dma_queue)) {
 387                 layer->next_frm = list_entry(layer->dma_queue.next,
 388                                                 struct vpbe_disp_buffer, list);
 389                 list_del(&layer->next_frm->list);
 390                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
 391         }
 392
 393         return 0;
 394 }
 395
 396 static struct vb2_ops video_qops = {
 397         .queue_setup = vpbe_buffer_queue_setup,
 398         .wait_prepare = vpbe_wait_prepare,
 399         .wait_finish = vpbe_wait_finish,
 400         .buf_init = vpbe_buffer_init,
 401         .buf_prepare = vpbe_buffer_prepare,
 402         .start_streaming = vpbe_start_streaming,
 403         .stop_streaming = vpbe_stop_streaming,
 404         .buf_cleanup = vpbe_buf_cleanup,
 405         .buf_queue = vpbe_buffer_queue,
 406 };
 407
 408 static
 409 struct vpbe_layer*
 410 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 411                         struct vpbe_layer *layer)
 412 {
 413         enum vpbe_display_device_id thiswin, otherwin;
 414         thiswin = layer->device_id;
 415
 416         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 417         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 418         return disp_dev->dev[otherwin];
 419 }
 420
 421 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 422                         struct vpbe_layer *layer)
 423 {
 424         struct osd_layer_config *cfg  = &layer->layer_info.config;
 425         struct osd_state *osd_device = disp_dev->osd_device;
 426         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 427         unsigned long addr;
 428         int ret;
 429
 430         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
 431         /* Set address in the display registers */
 432         osd_device->ops.start_layer(osd_device,
 433                                     layer->layer_info.id,
 434                                     addr,
 435                                     disp_dev->cbcr_ofst);
 436
 437         ret = osd_device->ops.enable_layer(osd_device,
 438                                 layer->layer_info.id, 0);
 439         if (ret < 0) {
 440                 v4l2_err(&vpbe_dev->v4l2_dev,
 441                         "Error in enabling osd window layer 0\n");
 442                 return -1;
 443         }
 444
 445         /* Enable the window */
 446         layer->layer_info.enable = 1;
 447         if (cfg->pixfmt == PIXFMT_NV12) {
 448                 struct vpbe_layer *otherlayer =
 449                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 450
 451                 ret = osd_device->ops.enable_layer(osd_device,
 452                                 otherlayer->layer_info.id, 1);
 453                 if (ret < 0) {
 454                         v4l2_err(&vpbe_dev->v4l2_dev,
 455                                 "Error in enabling osd window layer 1\n");
 456                         return -1;
 457                 }
 458                 otherlayer->layer_info.enable = 1;
 459         }
 460         return 0;
 461 }
 462
 463 static void
 464 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 465                         struct vpbe_layer *layer,
 466                         int expected_xsize, int expected_ysize)
 467 {
 468         struct display_layer_info *layer_info = &layer->layer_info;
 469         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 470         struct osd_layer_config *cfg  = &layer->layer_info.config;
 471         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 472         int calculated_xsize;
 473         int h_exp = 0;
 474         int v_exp = 0;
 475         int h_scale;
 476         int v_scale;
 477
 478         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 479
 480         /*
 481          * Application initially set the image format. Current display
 482          * size is obtained from the vpbe display controller. expected_xsize
 483          * and expected_ysize are set through S_CROP ioctl. Based on this,
 484          * driver will calculate the scale factors for vertical and
 485          * horizontal direction so that the image is displayed scaled
 486          * and expanded. Application uses expansion to display the image
 487          * in a square pixel. Otherwise it is displayed using displays
 488          * pixel aspect ratio.It is expected that application chooses
 489          * the crop coordinates for cropped or scaled display. if crop
 490          * size is less than the image size, it is displayed cropped or
 491          * it is displayed scaled and/or expanded.
 492          *
 493          * to begin with, set the crop window same as expected. Later we
 494          * will override with scaled window size
 495          */
 496
 497         cfg->xsize = pixfmt->width;
 498         cfg->ysize = pixfmt->height;
 499         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 500         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 501         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 502         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 503
 504         if (pixfmt->width < expected_xsize) {
 505                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 506                 if (h_scale < 2)
 507                         h_scale = 1;
 508                 else if (h_scale >= 4)
 509                         h_scale = 4;
 510                 else
 511                         h_scale = 2;
 512                 cfg->xsize *= h_scale;
 513                 if (cfg->xsize < expected_xsize) {
 514                         if ((standard_id & V4L2_STD_525_60) ||
 515                         (standard_id & V4L2_STD_625_50)) {
 516                                 calculated_xsize = (cfg->xsize *
 517                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 518                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 519                                 if (calculated_xsize <= expected_xsize) {
 520                                         h_exp = 1;
 521                                         cfg->xsize = calculated_xsize;
 522                                 }
 523                         }
 524                 }
 525                 if (h_scale == 2)
 526                         layer_info->h_zoom = ZOOM_X2;
 527                 else if (h_scale == 4)
 528                         layer_info->h_zoom = ZOOM_X4;
 529                 if (h_exp)
 530                         layer_info->h_exp = H_EXP_9_OVER_8;
 531         } else {
 532                 /* no scaling, only cropping. Set display area to crop area */
 533                 cfg->xsize = expected_xsize;
 534         }
 535
 536         if (pixfmt->height < expected_ysize) {
 537                 v_scale = expected_ysize / pixfmt->height;
 538                 if (v_scale < 2)
 539                         v_scale = 1;
 540                 else if (v_scale >= 4)
 541                         v_scale = 4;
 542                 else
 543                         v_scale = 2;
 544                 cfg->ysize *= v_scale;
 545                 if (cfg->ysize < expected_ysize) {
 546                         if ((standard_id & V4L2_STD_625_50)) {
 547                                 calculated_xsize = (cfg->ysize *
 548                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 549                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 550                                 if (calculated_xsize <= expected_ysize) {
 551                                         v_exp = 1;
 552                                         cfg->ysize = calculated_xsize;
 553                                 }
 554                         }
 555                 }
 556                 if (v_scale == 2)
 557                         layer_info->v_zoom = ZOOM_X2;
 558                 else if (v_scale == 4)
 559                         layer_info->v_zoom = ZOOM_X4;
 560                 if (v_exp)
 561                         layer_info->h_exp = V_EXP_6_OVER_5;
 562         } else {
 563                 /* no scaling, only cropping. Set display area to crop area */
 564                 cfg->ysize = expected_ysize;
 565         }
 566         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 567                 "crop display xsize = %d, ysize = %d\n",
 568                 cfg->xsize, cfg->ysize);
 569 }
 570
 571 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 572                         struct vpbe_layer *layer,
 573                         int top, int left)
 574 {
 575         struct osd_layer_config *cfg = &layer->layer_info.config;
 576         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 577
 578         cfg->xpos = min((unsigned int)left,
 579                         vpbe_dev->current_timings.xres - cfg->xsize);
 580         cfg->ypos = min((unsigned int)top,
 581                         vpbe_dev->current_timings.yres - cfg->ysize);
 582
 583         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 584                 "new xpos = %d, ypos = %d\n",
 585                 cfg->xpos, cfg->ypos);
 586 }
 587
 588 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 589                         struct v4l2_rect *c)
 590 {
 591         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 592
 593         if ((c->width == 0) ||
 594           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 595                 c->width = vpbe_dev->current_timings.xres - c->left;
 596
 597         if ((c->height == 0) || ((c->height + c->top) >
 598           vpbe_dev->current_timings.yres))
 599                 c->height = vpbe_dev->current_timings.yres - c->top;
 600
 601         /* window height must be even for interlaced display */
 602         if (vpbe_dev->current_timings.interlaced)
 603                 c->height &= (~0x01);
 604
 605 }
 606
 607 /**
 608  * vpbe_try_format()
 609  * If user application provides width and height, and have bytesperline set
 610  * to zero, driver calculates bytesperline and sizeimage based on hardware
 611  * limits.
 612  */
 613 static int vpbe_try_format(struct vpbe_display *disp_dev,
 614                         struct v4l2_pix_format *pixfmt, int check)
 615 {
 616         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 617         int min_height = 1;
 618         int min_width = 32;
 619         int max_height;
 620         int max_width;
 621         int bpp;
 622
 623         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 624             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 625                 /* choose default as V4L2_PIX_FMT_UYVY */
 626                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 627
 628         /* Check the field format */
 629         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 630                 (pixfmt->field != V4L2_FIELD_NONE)) {
 631                 if (vpbe_dev->current_timings.interlaced)
 632                         pixfmt->field = V4L2_FIELD_INTERLACED;
 633                 else
 634                         pixfmt->field = V4L2_FIELD_NONE;
 635         }
 636
 637         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 638                 min_height = 2;
 639
 640         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 641                 bpp = 1;
 642         else
 643                 bpp = 2;
 644
 645         max_width = vpbe_dev->current_timings.xres;
 646         max_height = vpbe_dev->current_timings.yres;
 647
 648         min_width /= bpp;
 649
 650         if (!pixfmt->width || (pixfmt->width < min_width) ||
 651                 (pixfmt->width > max_width)) {
 652                 pixfmt->width = vpbe_dev->current_timings.xres;
 653         }
 654
 655         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 656                 (pixfmt->height  > max_height)) {
 657                 pixfmt->height = vpbe_dev->current_timings.yres;
 658         }
 659
 660         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 661                 pixfmt->bytesperline = pixfmt->width * bpp;
 662
 663         /* Make the bytesperline 32 byte aligned */
 664         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 665
 666         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 667                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 668                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 669         else
 670                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 671
 672         return 0;
 673 }
 674
 675 static int vpbe_display_g_priority(struct file *file, void *priv,
 676                                 enum v4l2_priority *p)
 677 {
 678         struct vpbe_fh *fh = file->private_data;
 679         struct vpbe_layer *layer = fh->layer;
 680
 681         *p = v4l2_prio_max(&layer->prio);
 682
 683         return 0;
 684 }
 685
 686 static int vpbe_display_s_priority(struct file *file, void *priv,
 687                                 enum v4l2_priority p)
 688 {
 689         struct vpbe_fh *fh = file->private_data;
 690         struct vpbe_layer *layer = fh->layer;
 691         int ret;
 692
 693         ret = v4l2_prio_change(&layer->prio, &fh->prio, p);
 694
 695         return ret;
 696 }
 697
 698 static int vpbe_display_querycap(struct file *file, void  *priv,
 699                                struct v4l2_capability *cap)
 700 {
 701         struct vpbe_fh *fh = file->private_data;
 702         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 703
 704         cap->version = VPBE_DISPLAY_VERSION_CODE;
 705         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 706         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 707         snprintf(cap->driver, sizeof(cap->driver), "%s",
 708                 dev_name(vpbe_dev->pdev));
 709         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 710                  dev_name(vpbe_dev->pdev));
 711         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 712
 713         return 0;
 714 }
 715
 716 static int vpbe_display_s_crop(struct file *file, void *priv,
 717                              const struct v4l2_crop *crop)
 718 {
 719         struct vpbe_fh *fh = file->private_data;
 720         struct vpbe_layer *layer = fh->layer;
 721         struct vpbe_display *disp_dev = fh->disp_dev;
 722         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 723         struct osd_layer_config *cfg = &layer->layer_info.config;
 724         struct osd_state *osd_device = disp_dev->osd_device;
 725         struct v4l2_rect rect = crop->c;
 726         int ret;
 727
 728         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 729                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 730
 731         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 732                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 733                 return -EINVAL;
 734         }
 735
 736         if (rect.top < 0)
 737                 rect.top = 0;
 738         if (rect.left < 0)
 739                 rect.left = 0;
 740
 741         vpbe_disp_check_window_params(disp_dev, &rect);
 742
 743         osd_device->ops.get_layer_config(osd_device,
 744                         layer->layer_info.id, cfg);
 745
 746         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 747                                         rect.width,
 748                                         rect.height);
 749         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 750                                         rect.left);
 751         ret = osd_device->ops.set_layer_config(osd_device,
 752                                 layer->layer_info.id, cfg);
 753         if (ret < 0) {
 754                 v4l2_err(&vpbe_dev->v4l2_dev,
 755                         "Error in set layer config:\n");
 756                 return -EINVAL;
 757         }
 758
 759         /* apply zooming and h or v expansion */
 760         osd_device->ops.set_zoom(osd_device,
 761                         layer->layer_info.id,
 762                         layer->layer_info.h_zoom,
 763                         layer->layer_info.v_zoom);
 764         ret = osd_device->ops.set_vid_expansion(osd_device,
 765                         layer->layer_info.h_exp,
 766                         layer->layer_info.v_exp);
 767         if (ret < 0) {
 768                 v4l2_err(&vpbe_dev->v4l2_dev,
 769                 "Error in set vid expansion:\n");
 770                 return -EINVAL;
 771         }
 772
 773         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 774                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 775                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 776                 (layer->layer_info.v_exp != V_EXP_OFF))
 777                 /* Enable expansion filter */
 778                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 779         else
 780                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 781
 782         return 0;
 783 }
 784
 785 static int vpbe_display_g_crop(struct file *file, void *priv,
 786                              struct v4l2_crop *crop)
 787 {
 788         struct vpbe_fh *fh = file->private_data;
 789         struct vpbe_layer *layer = fh->layer;
 790         struct osd_layer_config *cfg = &layer->layer_info.config;
 791         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 792         struct osd_state *osd_device = fh->disp_dev->osd_device;
 793         struct v4l2_rect *rect = &crop->c;
 794
 795         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 796                         "VIDIOC_G_CROP, layer id = %d\n",
 797                         layer->device_id);
 798
 799         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 800                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 801                 return -EINVAL;
 802         }
 803         osd_device->ops.get_layer_config(osd_device,
 804                                 layer->layer_info.id, cfg);
 805         rect->top = cfg->ypos;
 806         rect->left = cfg->xpos;
 807         rect->width = cfg->xsize;
 808         rect->height = cfg->ysize;
 809
 810         return 0;
 811 }
 812
 813 static int vpbe_display_cropcap(struct file *file, void *priv,
 814                               struct v4l2_cropcap *cropcap)
 815 {
 816         struct vpbe_fh *fh = file->private_data;
 817         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 818
 819         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 820
 821         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 822         cropcap->bounds.left = 0;
 823         cropcap->bounds.top = 0;
 824         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 825         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 826         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 827         cropcap->defrect = cropcap->bounds;
 828         return 0;
 829 }
 830
 831 static int vpbe_display_g_fmt(struct file *file, void *priv,
 832                                 struct v4l2_format *fmt)
 833 {
 834         struct vpbe_fh *fh = file->private_data;
 835         struct vpbe_layer *layer = fh->layer;
 836         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 837
 838         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 839                         "VIDIOC_G_FMT, layer id = %d\n",
 840                         layer->device_id);
 841
 842         /* If buffer type is video output */
 843         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 844                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 845                 return -EINVAL;
 846         }
 847         /* Fill in the information about format */
 848         fmt->fmt.pix = layer->pix_fmt;
 849
 850         return 0;
 851 }
 852
 853 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 854                                    struct v4l2_fmtdesc *fmt)
 855 {
 856         struct vpbe_fh *fh = file->private_data;
 857         struct vpbe_layer *layer = fh->layer;
 858         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 859         unsigned int index = 0;
 860
 861         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 862                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 863                                 layer->device_id);
 864         if (fmt->index > 1) {
 865                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 866                 return -EINVAL;
 867         }
 868
 869         /* Fill in the information about format */
 870         index = fmt->index;
 871         memset(fmt, 0, sizeof(*fmt));
 872         fmt->index = index;
 873         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 874         if (index == 0) {
 875                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 876                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 877         } else {
 878                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 879                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int vpbe_display_s_fmt(struct file *file, void *priv,
 886                                 struct v4l2_format *fmt)
 887 {
 888         struct vpbe_fh *fh = file->private_data;
 889         struct vpbe_layer *layer = fh->layer;
 890         struct vpbe_display *disp_dev = fh->disp_dev;
 891         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 892         struct osd_layer_config *cfg  = &layer->layer_info.config;
 893         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 894         struct osd_state *osd_device = disp_dev->osd_device;
 895         int ret;
 896
 897         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 898                         "VIDIOC_S_FMT, layer id = %d\n",
 899                         layer->device_id);
 900
 901         /* If streaming is started, return error */
 902         if (layer->started) {
 903                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 904                 return -EBUSY;
 905         }
 906         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 907                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 908                 return -EINVAL;
 909         }
 910         /* Check for valid pixel format */
 911         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 912         if (ret)
 913                 return ret;
 914
 915         /* YUV420 is requested, check availability of the
 916         other video window */
 917
 918         layer->pix_fmt = *pixfmt;
 919         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
 920                 struct vpbe_layer *otherlayer;
 921
 922                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
 923                 /* if other layer is available, only
 924                  * claim it, do not configure it
 925                  */
 926                 ret = osd_device->ops.request_layer(osd_device,
 927                                                     otherlayer->layer_info.id);
 928                 if (ret < 0) {
 929                         v4l2_err(&vpbe_dev->v4l2_dev,
 930                                  "Display Manager failed to allocate layer\n");
 931                         return -EBUSY;
 932                 }
 933         }
 934
 935         /* Get osd layer config */
 936         osd_device->ops.get_layer_config(osd_device,
 937                         layer->layer_info.id, cfg);
 938         /* Store the pixel format in the layer object */
 939         cfg->xsize = pixfmt->width;
 940         cfg->ysize = pixfmt->height;
 941         cfg->line_length = pixfmt->bytesperline;
 942         cfg->ypos = 0;
 943         cfg->xpos = 0;
 944         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 945
 946         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 947                 cfg->pixfmt = PIXFMT_YCBCRI;
 948
 949         /* Change of the default pixel format for both video windows */
 950         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 951                 struct vpbe_layer *otherlayer;
 952                 cfg->pixfmt = PIXFMT_NV12;
 953                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 954                                                                 layer);
 955                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 956         }
 957
 958         /* Set the layer config in the osd window */
 959         ret = osd_device->ops.set_layer_config(osd_device,
 960                                 layer->layer_info.id, cfg);
 961         if (ret < 0) {
 962                 v4l2_err(&vpbe_dev->v4l2_dev,
 963                                 "Error in S_FMT params:\n");
 964                 return -EINVAL;
 965         }
 966
 967         /* Readback and fill the local copy of current pix format */
 968         osd_device->ops.get_layer_config(osd_device,
 969                         layer->layer_info.id, cfg);
 970
 971         return 0;
 972 }
 973
 974 static int vpbe_display_try_fmt(struct file *file, void *priv,
 975                                   struct v4l2_format *fmt)
 976 {
 977         struct vpbe_fh *fh = file->private_data;
 978         struct vpbe_display *disp_dev = fh->disp_dev;
 979         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 980         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 981
 982         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 983
 984         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 985                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 986                 return -EINVAL;
 987         }
 988
 989         /* Check for valid field format */
 990         return  vpbe_try_format(disp_dev, pixfmt, 0);
 991
 992 }
 993
 994 /**
 995  * vpbe_display_s_std - Set the given standard in the encoder
 996  *
 997  * Sets the standard if supported by the current encoder. Return the status.
 998  * 0 - success & -EINVAL on error
 999  */
1000 static int vpbe_display_s_std(struct file *file, void *priv,
1001                                 v4l2_std_id std_id)
1002 {
1003         struct vpbe_fh *fh = priv;
1004         struct vpbe_layer *layer = fh->layer;
1005         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1006         int ret;
1007
1008         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
1009
1010         /* If streaming is started, return error */
1011         if (layer->started) {
1012                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1013                 return -EBUSY;
1014         }
1015         if (NULL != vpbe_dev->ops.s_std) {
1016                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1017                 if (ret) {
1018                         v4l2_err(&vpbe_dev->v4l2_dev,
1019                         "Failed to set standard for sub devices\n");
1020                         return -EINVAL;
1021                 }
1022         } else {
1023                 return -EINVAL;
1024         }
1025
1026         return 0;
1027 }
1028
1029 /**
1030  * vpbe_display_g_std - Get the standard in the current encoder
1031  *
1032  * Get the standard in the current encoder. Return the status. 0 - success
1033  * -EINVAL on error
1034  */
1035 static int vpbe_display_g_std(struct file *file, void *priv,
1036                                 v4l2_std_id *std_id)
1037 {
1038         struct vpbe_fh *fh = priv;
1039         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1040
1041         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1042
1043         /* Get the standard from the current encoder */
1044         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1045                 *std_id = vpbe_dev->current_timings.std_id;
1046                 return 0;
1047         }
1048
1049         return -EINVAL;
1050 }
1051
1052 /**
1053  * vpbe_display_enum_output - enumerate outputs
1054  *
1055  * Enumerates the outputs available at the vpbe display
1056  * returns the status, -EINVAL if end of output list
1057  */
1058 static int vpbe_display_enum_output(struct file *file, void *priv,
1059                                     struct v4l2_output *output)
1060 {
1061         struct vpbe_fh *fh = priv;
1062         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1063         int ret;
1064
1065         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1066
1067         /* Enumerate outputs */
1068
1069         if (NULL == vpbe_dev->ops.enum_outputs)
1070                 return -EINVAL;
1071
1072         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1073         if (ret) {
1074                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1075                         "Failed to enumerate outputs\n");
1076                 return -EINVAL;
1077         }
1078
1079         return 0;
1080 }
1081
1082 /**
1083  * vpbe_display_s_output - Set output to
1084  * the output specified by the index
1085  */
1086 static int vpbe_display_s_output(struct file *file, void *priv,
1087                                 unsigned int i)
1088 {
1089         struct vpbe_fh *fh = priv;
1090         struct vpbe_layer *layer = fh->layer;
1091         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1092         int ret;
1093
1094         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1095         /* If streaming is started, return error */
1096         if (layer->started) {
1097                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1098                 return -EBUSY;
1099         }
1100         if (NULL == vpbe_dev->ops.set_output)
1101                 return -EINVAL;
1102
1103         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1104         if (ret) {
1105                 v4l2_err(&vpbe_dev->v4l2_dev,
1106                         "Failed to set output for sub devices\n");
1107                 return -EINVAL;
1108         }
1109
1110         return 0;
1111 }
1112
1113 /**
1114  * vpbe_display_g_output - Get output from subdevice
1115  * for a given by the index
1116  */
1117 static int vpbe_display_g_output(struct file *file, void *priv,
1118                                 unsigned int *i)
1119 {
1120         struct vpbe_fh *fh = priv;
1121         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1122
1123         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1124         /* Get the standard from the current encoder */
1125         *i = vpbe_dev->current_out_index;
1126
1127         return 0;
1128 }
1129
1130 /**
1131  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1132  *
1133  * enum the timings in the current encoder. Return the status. 0 - success
1134  * -EINVAL on error
1135  */
1136 static int
1137 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1138                         struct v4l2_enum_dv_timings *timings)
1139 {
1140         struct vpbe_fh *fh = priv;
1141         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1142         int ret;
1143
1144         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1145
1146         /* Enumerate outputs */
1147         if (NULL == vpbe_dev->ops.enum_dv_timings)
1148                 return -EINVAL;
1149
1150         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1151         if (ret) {
1152                 v4l2_err(&vpbe_dev->v4l2_dev,
1153                         "Failed to enumerate dv timings info\n");
1154                 return -EINVAL;
1155         }
1156
1157         return 0;
1158 }
1159
1160 /**
1161  * vpbe_display_s_dv_timings - Set the dv timings
1162  *
1163  * Set the timings in the current encoder. Return the status. 0 - success
1164  * -EINVAL on error
1165  */
1166 static int
1167 vpbe_display_s_dv_timings(struct file *file, void *priv,
1168                                 struct v4l2_dv_timings *timings)
1169 {
1170         struct vpbe_fh *fh = priv;
1171         struct vpbe_layer *layer = fh->layer;
1172         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1173         int ret;
1174
1175         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1176
1177
1178         /* If streaming is started, return error */
1179         if (layer->started) {
1180                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1181                 return -EBUSY;
1182         }
1183
1184         /* Set the given standard in the encoder */
1185         if (!vpbe_dev->ops.s_dv_timings)
1186                 return -EINVAL;
1187
1188         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1189         if (ret) {
1190                 v4l2_err(&vpbe_dev->v4l2_dev,
1191                         "Failed to set the dv timings info\n");
1192                 return -EINVAL;
1193         }
1194
1195         return 0;
1196 }
1197
1198 /**
1199  * vpbe_display_g_dv_timings - Set the dv timings
1200  *
1201  * Get the timings in the current encoder. Return the status. 0 - success
1202  * -EINVAL on error
1203  */
1204 static int
1205 vpbe_display_g_dv_timings(struct file *file, void *priv,
1206                                 struct v4l2_dv_timings *dv_timings)
1207 {
1208         struct vpbe_fh *fh = priv;
1209         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1210
1211         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1212
1213         /* Get the given standard in the encoder */
1214
1215         if (vpbe_dev->current_timings.timings_type &
1216                                 VPBE_ENC_DV_TIMINGS) {
1217                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1218         } else {
1219                 return -EINVAL;
1220         }
1221
1222         return 0;
1223 }
1224
1225 static int vpbe_display_streamoff(struct file *file, void *priv,
1226                                 enum v4l2_buf_type buf_type)
1227 {
1228         struct vpbe_fh *fh = file->private_data;
1229         struct vpbe_layer *layer = fh->layer;
1230         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1231         struct osd_state *osd_device = fh->disp_dev->osd_device;
1232         int ret;
1233
1234         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1235                         "VIDIOC_STREAMOFF,layer id = %d\n",
1236                         layer->device_id);
1237
1238         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1239                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1240                 return -EINVAL;
1241         }
1242
1243         /* If io is allowed for this file handle, return error */
1244         if (!fh->io_allowed) {
1245                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1246                 return -EACCES;
1247         }
1248
1249         /* If streaming is not started, return error */
1250         if (!layer->started) {
1251                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1252                         " id = %d\n", layer->device_id);
1253                 return -EINVAL;
1254         }
1255
1256         osd_device->ops.disable_layer(osd_device,
1257                         layer->layer_info.id);
1258         layer->started = 0;
1259         ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1260
1261         return ret;
1262 }
1263
1264 static int vpbe_display_streamon(struct file *file, void *priv,
1265                          enum v4l2_buf_type buf_type)
1266 {
1267         struct vpbe_fh *fh = file->private_data;
1268         struct vpbe_layer *layer = fh->layer;
1269         struct vpbe_display *disp_dev = fh->disp_dev;
1270         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1271         struct osd_state *osd_device = disp_dev->osd_device;
1272         int ret;
1273
1274         osd_device->ops.disable_layer(osd_device,
1275                         layer->layer_info.id);
1276
1277         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1278                                                 layer->device_id);
1279
1280         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1281                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1282                 return -EINVAL;
1283         }
1284
1285         /* If file handle is not allowed IO, return error */
1286         if (!fh->io_allowed) {
1287                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1288                 return -EACCES;
1289         }
1290         /* If Streaming is already started, return error */
1291         if (layer->started) {
1292                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1293                 return -EBUSY;
1294         }
1295
1296         /*
1297          * Call vb2_streamon to start streaming
1298          * in videobuf
1299          */
1300         ret = vb2_streamon(&layer->buffer_queue, buf_type);
1301         if (ret) {
1302                 v4l2_err(&vpbe_dev->v4l2_dev,
1303                 "error in vb2_streamon\n");
1304                 return ret;
1305         }
1306         return ret;
1307 }
1308
1309 static int vpbe_display_dqbuf(struct file *file, void *priv,
1310                       struct v4l2_buffer *buf)
1311 {
1312         struct vpbe_fh *fh = file->private_data;
1313         struct vpbe_layer *layer = fh->layer;
1314         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1315         int ret;
1316
1317         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1318                 "VIDIOC_DQBUF, layer id = %d\n",
1319                 layer->device_id);
1320
1321         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1322                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1323                 return -EINVAL;
1324         }
1325         /* If this file handle is not allowed to do IO, return error */
1326         if (!fh->io_allowed) {
1327                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1328                 return -EACCES;
1329         }
1330         if (file->f_flags & O_NONBLOCK)
1331                 /* Call videobuf_dqbuf for non blocking mode */
1332                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1333         else
1334                 /* Call videobuf_dqbuf for blocking mode */
1335                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1336
1337         return ret;
1338 }
1339
1340 static int vpbe_display_qbuf(struct file *file, void *priv,
1341                      struct v4l2_buffer *p)
1342 {
1343         struct vpbe_fh *fh = file->private_data;
1344         struct vpbe_layer *layer = fh->layer;
1345         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1346
1347         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1348                 "VIDIOC_QBUF, layer id = %d\n",
1349                 layer->device_id);
1350
1351         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1352                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1353                 return -EINVAL;
1354         }
1355
1356         /* If this file handle is not allowed to do IO, return error */
1357         if (!fh->io_allowed) {
1358                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1359                 return -EACCES;
1360         }
1361
1362         return vb2_qbuf(&layer->buffer_queue, p);
1363 }
1364
1365 static int vpbe_display_querybuf(struct file *file, void *priv,
1366                          struct v4l2_buffer *buf)
1367 {
1368         struct vpbe_fh *fh = file->private_data;
1369         struct vpbe_layer *layer = fh->layer;
1370         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1371
1372         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1373                 "VIDIOC_QUERYBUF, layer id = %d\n",
1374                 layer->device_id);
1375
1376         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1377                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1378                 return -EINVAL;
1379         }
1380         /* Call vb2_querybuf to get information */
1381         return vb2_querybuf(&layer->buffer_queue, buf);
1382 }
1383
1384 static int vpbe_display_reqbufs(struct file *file, void *priv,
1385                         struct v4l2_requestbuffers *req_buf)
1386 {
1387         struct vpbe_fh *fh = file->private_data;
1388         struct vpbe_layer *layer = fh->layer;
1389         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1390         struct vb2_queue *q;
1391         int ret;
1392         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1393
1394         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1395                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1396                 return -EINVAL;
1397         }
1398
1399         /* If io users of the layer is not zero, return error */
1400         if (0 != layer->io_usrs) {
1401                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1402                 return -EBUSY;
1403         }
1404         /* Initialize videobuf queue as per the buffer type */
1405         layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1406         if (IS_ERR(layer->alloc_ctx)) {
1407                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1408                 return PTR_ERR(layer->alloc_ctx);
1409         }
1410         q = &layer->buffer_queue;
1411         memset(q, 0, sizeof(*q));
1412         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1413         q->io_modes = VB2_MMAP | VB2_USERPTR;
1414         q->drv_priv = fh;
1415         q->ops = &video_qops;
1416         q->mem_ops = &vb2_dma_contig_memops;
1417         q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1418         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1419
1420         ret = vb2_queue_init(q);
1421         if (ret) {
1422                 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1423                 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1424                 return ret;
1425         }
1426         /* Set io allowed member of file handle to TRUE */
1427         fh->io_allowed = 1;
1428         /* Increment io usrs member of layer object to 1 */
1429         layer->io_usrs = 1;
1430         /* Store type of memory requested in layer object */
1431         layer->memory = req_buf->memory;
1432         /* Initialize buffer queue */
1433         INIT_LIST_HEAD(&layer->dma_queue);
1434         /* Allocate buffers */
1435         return vb2_reqbufs(q, req_buf);
1436 }
1437
1438 /*
1439  * vpbe_display_mmap()
1440  * It is used to map kernel space buffers into user spaces
1441  */
1442 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1443 {
1444         /* Get the layer object and file handle object */
1445         struct vpbe_fh *fh = filep->private_data;
1446         struct vpbe_layer *layer = fh->layer;
1447         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1448         int ret;
1449
1450         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1451
1452         if (mutex_lock_interruptible(&layer->opslock))
1453                 return -ERESTARTSYS;
1454         ret = vb2_mmap(&layer->buffer_queue, vma);
1455         mutex_unlock(&layer->opslock);
1456         return ret;
1457 }
1458
1459 /* vpbe_display_poll(): It is used for select/poll system call
1460  */
1461 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1462 {
1463         struct vpbe_fh *fh = filep->private_data;
1464         struct vpbe_layer *layer = fh->layer;
1465         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1466         unsigned int err = 0;
1467
1468         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1469         if (layer->started) {
1470                 mutex_lock(&layer->opslock);
1471                 err = vb2_poll(&layer->buffer_queue, filep, wait);
1472                 mutex_unlock(&layer->opslock);
1473         }
1474         return err;
1475 }
1476
1477 /*
1478  * vpbe_display_open()
1479  * It creates object of file handle structure and stores it in private_data
1480  * member of filepointer
1481  */
1482 static int vpbe_display_open(struct file *file)
1483 {
1484         struct vpbe_fh *fh = NULL;
1485         struct vpbe_layer *layer = video_drvdata(file);
1486         struct vpbe_display *disp_dev = layer->disp_dev;
1487         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1488         struct osd_state *osd_device = disp_dev->osd_device;
1489         int err;
1490
1491         /* Allocate memory for the file handle object */
1492         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1493         if (fh == NULL) {
1494                 v4l2_err(&vpbe_dev->v4l2_dev,
1495                         "unable to allocate memory for file handle object\n");
1496                 return -ENOMEM;
1497         }
1498         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1499                         "vpbe display open plane = %d\n",
1500                         layer->device_id);
1501
1502         /* store pointer to fh in private_data member of filep */
1503         file->private_data = fh;
1504         fh->layer = layer;
1505         fh->disp_dev = disp_dev;
1506
1507         if (!layer->usrs) {
1508                 if (mutex_lock_interruptible(&layer->opslock))
1509                         return -ERESTARTSYS;
1510                 /* First claim the layer for this device */
1511                 err = osd_device->ops.request_layer(osd_device,
1512                                                 layer->layer_info.id);
1513                 mutex_unlock(&layer->opslock);
1514                 if (err < 0) {
1515                         /* Couldn't get layer */
1516                         v4l2_err(&vpbe_dev->v4l2_dev,
1517                                 "Display Manager failed to allocate layer\n");
1518                         kfree(fh);
1519                         return -EINVAL;
1520                 }
1521         }
1522         /* Increment layer usrs counter */
1523         layer->usrs++;
1524         /* Set io_allowed member to false */
1525         fh->io_allowed = 0;
1526         /* Initialize priority of this instance to default priority */
1527         fh->prio = V4L2_PRIORITY_UNSET;
1528         v4l2_prio_open(&layer->prio, &fh->prio);
1529         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1530                         "vpbe display device opened successfully\n");
1531         return 0;
1532 }
1533
1534 /*
1535  * vpbe_display_release()
1536  * This function deletes buffer queue, frees the buffers and the davinci
1537  * display file * handle
1538  */
1539 static int vpbe_display_release(struct file *file)
1540 {
1541         /* Get the layer object and file handle object */
1542         struct vpbe_fh *fh = file->private_data;
1543         struct vpbe_layer *layer = fh->layer;
1544         struct osd_layer_config *cfg  = &layer->layer_info.config;
1545         struct vpbe_display *disp_dev = fh->disp_dev;
1546         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1547         struct osd_state *osd_device = disp_dev->osd_device;
1548
1549         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1550
1551         mutex_lock(&layer->opslock);
1552         /* if this instance is doing IO */
1553         if (fh->io_allowed) {
1554                 /* Reset io_usrs member of layer object */
1555                 layer->io_usrs = 0;
1556
1557                 osd_device->ops.disable_layer(osd_device,
1558                                 layer->layer_info.id);
1559                 layer->started = 0;
1560                 /* Free buffers allocated */
1561                 vb2_queue_release(&layer->buffer_queue);
1562                 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1563         }
1564
1565         /* Decrement layer usrs counter */
1566         layer->usrs--;
1567         /* If this file handle has initialize encoder device, reset it */
1568         if (!layer->usrs) {
1569                 if (cfg->pixfmt == PIXFMT_NV12) {
1570                         struct vpbe_layer *otherlayer;
1571                         otherlayer =
1572                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1573                         osd_device->ops.disable_layer(osd_device,
1574                                         otherlayer->layer_info.id);
1575                         osd_device->ops.release_layer(osd_device,
1576                                         otherlayer->layer_info.id);
1577                 }
1578                 osd_device->ops.disable_layer(osd_device,
1579                                 layer->layer_info.id);
1580                 osd_device->ops.release_layer(osd_device,
1581                                 layer->layer_info.id);
1582         }
1583         /* Close the priority */
1584         v4l2_prio_close(&layer->prio, fh->prio);
1585         file->private_data = NULL;
1586         mutex_unlock(&layer->opslock);
1587
1588         /* Free memory allocated to file handle object */
1589         kfree(fh);
1590
1591         disp_dev->cbcr_ofst = 0;
1592
1593         return 0;
1594 }
1595
1596 /* vpbe capture ioctl operations */
1597 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1598         .vidioc_querycap         = vpbe_display_querycap,
1599         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1600         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1601         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1602         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1603         .vidioc_reqbufs          = vpbe_display_reqbufs,
1604         .vidioc_querybuf         = vpbe_display_querybuf,
1605         .vidioc_qbuf             = vpbe_display_qbuf,
1606         .vidioc_dqbuf            = vpbe_display_dqbuf,
1607         .vidioc_streamon         = vpbe_display_streamon,
1608         .vidioc_streamoff        = vpbe_display_streamoff,
1609         .vidioc_cropcap          = vpbe_display_cropcap,
1610         .vidioc_g_crop           = vpbe_display_g_crop,
1611         .vidioc_s_crop           = vpbe_display_s_crop,
1612         .vidioc_g_priority       = vpbe_display_g_priority,
1613         .vidioc_s_priority       = vpbe_display_s_priority,
1614         .vidioc_s_std            = vpbe_display_s_std,
1615         .vidioc_g_std            = vpbe_display_g_std,
1616         .vidioc_enum_output      = vpbe_display_enum_output,
1617         .vidioc_s_output         = vpbe_display_s_output,
1618         .vidioc_g_output         = vpbe_display_g_output,
1619         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1620         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1621         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1622 };
1623
1624 static struct v4l2_file_operations vpbe_fops = {
1625         .owner = THIS_MODULE,
1626         .open = vpbe_display_open,
1627         .release = vpbe_display_release,
1628         .unlocked_ioctl = video_ioctl2,
1629         .mmap = vpbe_display_mmap,
1630         .poll = vpbe_display_poll
1631 };
1632
1633 static int vpbe_device_get(struct device *dev, void *data)
1634 {
1635         struct platform_device *pdev = to_platform_device(dev);
1636         struct vpbe_display *vpbe_disp  = data;
1637
1638         if (strcmp("vpbe_controller", pdev->name) == 0)
1639                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1640
1641         if (strstr(pdev->name, "vpbe-osd") != NULL)
1642                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1643
1644         return 0;
1645 }
1646
1647 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1648                            struct platform_device *pdev)
1649 {
1650         struct vpbe_layer *vpbe_display_layer = NULL;
1651         struct video_device *vbd = NULL;
1652
1653         /* Allocate memory for four plane display objects */
1654
1655         disp_dev->dev[i] =
1656                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1657
1658         /* If memory allocation fails, return error */
1659         if (!disp_dev->dev[i]) {
1660                 printk(KERN_ERR "ran out of memory\n");
1661                 return  -ENOMEM;
1662         }
1663         spin_lock_init(&disp_dev->dev[i]->irqlock);
1664         mutex_init(&disp_dev->dev[i]->opslock);
1665
1666         /* Get the pointer to the layer object */
1667         vpbe_display_layer = disp_dev->dev[i];
1668         vbd = &vpbe_display_layer->video_dev;
1669         /* Initialize field of video device */
1670         vbd->release    = video_device_release_empty;
1671         vbd->fops       = &vpbe_fops;
1672         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1673         vbd->minor      = -1;
1674         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1675         vbd->lock       = &vpbe_display_layer->opslock;
1676         vbd->vfl_dir    = VFL_DIR_TX;
1677
1678         if (disp_dev->vpbe_dev->current_timings.timings_type &
1679                         VPBE_ENC_STD)
1680                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1681
1682         snprintf(vbd->name, sizeof(vbd->name),
1683                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1684                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1685                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1686                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1687
1688         vpbe_display_layer->device_id = i;
1689
1690         vpbe_display_layer->layer_info.id =
1691                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1692
1693         /* Initialize prio member of layer object */
1694         v4l2_prio_init(&vpbe_display_layer->prio);
1695
1696         return 0;
1697 }
1698
1699 static int register_device(struct vpbe_layer *vpbe_display_layer,
1700                            struct vpbe_display *disp_dev,
1701                            struct platform_device *pdev)
1702 {
1703         int err;
1704
1705         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1706                   "Trying to register VPBE display device.\n");
1707         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1708                   "layer=%x,layer->video_dev=%x\n",
1709                   (int)vpbe_display_layer,
1710                   (int)&vpbe_display_layer->video_dev);
1711
1712         err = video_register_device(&vpbe_display_layer->video_dev,
1713                                     VFL_TYPE_GRABBER,
1714                                     -1);
1715         if (err)
1716                 return -ENODEV;
1717
1718         vpbe_display_layer->disp_dev = disp_dev;
1719         /* set the driver data in platform device */
1720         platform_set_drvdata(pdev, disp_dev);
1721         video_set_drvdata(&vpbe_display_layer->video_dev,
1722                           vpbe_display_layer);
1723
1724         return 0;
1725 }
1726
1727
1728
1729 /*
1730  * vpbe_display_probe()
1731  * This function creates device entries by register itself to the V4L2 driver
1732  * and initializes fields of each layer objects
1733  */
1734 static int vpbe_display_probe(struct platform_device *pdev)
1735 {
1736         struct vpbe_layer *vpbe_display_layer;
1737         struct vpbe_display *disp_dev;
1738         struct resource *res = NULL;
1739         int k;
1740         int i;
1741         int err;
1742         int irq;
1743
1744         printk(KERN_DEBUG "vpbe_display_probe\n");
1745         /* Allocate memory for vpbe_display */
1746         disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1747                                 GFP_KERNEL);
1748         if (!disp_dev)
1749                 return -ENOMEM;
1750
1751         spin_lock_init(&disp_dev->dma_queue_lock);
1752         /*
1753          * Scan all the platform devices to find the vpbe
1754          * controller device and get the vpbe_dev object
1755          */
1756         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1757                         vpbe_device_get);
1758         if (err < 0)
1759                 return err;
1760         /* Initialize the vpbe display controller */
1761         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1762                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1763                                                          disp_dev->vpbe_dev);
1764                 if (err) {
1765                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1766                                         "Error initing vpbe\n");
1767                         err = -ENOMEM;
1768                         goto probe_out;
1769                 }
1770         }
1771
1772         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1773                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1774                         err = -ENODEV;
1775                         goto probe_out;
1776                 }
1777         }
1778
1779         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1780         if (!res) {
1781                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1782                          "Unable to get VENC interrupt resource\n");
1783                 err = -ENODEV;
1784                 goto probe_out;
1785         }
1786
1787         irq = res->start;
1788         err = devm_request_irq(&pdev->dev, irq, venc_isr, IRQF_DISABLED,
1789                                VPBE_DISPLAY_DRIVER, disp_dev);
1790         if (err) {
1791                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1792                                 "Unable to request interrupt\n");
1793                 goto probe_out;
1794         }
1795
1796         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1797                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1798                         err = -ENODEV;
1799                         goto probe_out;
1800                 }
1801         }
1802
1803         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1804         return 0;
1805
1806 probe_out:
1807         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1808                 /* Get the pointer to the layer object */
1809                 vpbe_display_layer = disp_dev->dev[k];
1810                 /* Unregister video device */
1811                 if (vpbe_display_layer) {
1812                         video_unregister_device(
1813                                 &vpbe_display_layer->video_dev);
1814                                 kfree(disp_dev->dev[k]);
1815                 }
1816         }
1817         return err;
1818 }
1819
1820 /*
1821  * vpbe_display_remove()
1822  * It un-register hardware layer from V4L2 driver
1823  */
1824 static int vpbe_display_remove(struct platform_device *pdev)
1825 {
1826         struct vpbe_layer *vpbe_display_layer;
1827         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1828         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1829         int i;
1830
1831         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1832
1833         /* deinitialize the vpbe display controller */
1834         if (NULL != vpbe_dev->ops.deinitialize)
1835                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1836         /* un-register device */
1837         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1838                 /* Get the pointer to the layer object */
1839                 vpbe_display_layer = disp_dev->dev[i];
1840                 /* Unregister video device */
1841                 video_unregister_device(&vpbe_display_layer->video_dev);
1842
1843         }
1844         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1845                 kfree(disp_dev->dev[i]);
1846                 disp_dev->dev[i] = NULL;
1847         }
1848
1849         return 0;
1850 }
1851
1852 static struct platform_driver vpbe_display_driver = {
1853         .driver = {
1854                 .name = VPBE_DISPLAY_DRIVER,
1855                 .owner = THIS_MODULE,
1856                 .bus = &platform_bus_type,
1857         },
1858         .probe = vpbe_display_probe,
1859         .remove = vpbe_display_remove,
1860 };
1861
1862 module_platform_driver(vpbe_display_driver);
1863
1864 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1865 MODULE_LICENSE("GPL");
1866 MODULE_AUTHOR("Texas Instruments");