drivers/media/video/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 venc_is_second_field(struct vpbe_display *disp_dev)
  51 {
  52         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
  53         int ret;
  54         int val;
  55
  56         ret = v4l2_subdev_call(vpbe_dev->venc,
  57                                core,
  58                                ioctl,
  59                                VENC_GET_FLD,
  60                                &val);
  61         if (ret < 0) {
  62                 v4l2_err(&vpbe_dev->v4l2_dev,
  63                          "Error in getting Field ID 0\n");
  64         }
  65         return val;
  66 }
  67
  68 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
  69                                 struct vpbe_layer *layer)
  70 {
  71         struct timespec timevalue;
  72
  73         if (layer->cur_frm == layer->next_frm)
  74                 return;
  75         ktime_get_ts(&timevalue);
  76         layer->cur_frm->ts.tv_sec = timevalue.tv_sec;
  77         layer->cur_frm->ts.tv_usec = timevalue.tv_nsec / NSEC_PER_USEC;
  78         layer->cur_frm->state = VIDEOBUF_DONE;
  79         wake_up_interruptible(&layer->cur_frm->done);
  80         /* Make cur_frm pointing to next_frm */
  81         layer->cur_frm = layer->next_frm;
  82 }
  83
  84 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
  85                                 struct vpbe_layer *layer)
  86 {
  87         struct osd_state *osd_device = disp_obj->osd_device;
  88         unsigned long addr;
  89
  90         spin_lock(&disp_obj->dma_queue_lock);
  91         if (list_empty(&layer->dma_queue) ||
  92                 (layer->cur_frm != layer->next_frm)) {
  93                 spin_unlock(&disp_obj->dma_queue_lock);
  94                 return;
  95         }
  96         /*
  97          * one field is displayed configure
  98          * the next frame if it is available
  99          * otherwise hold on current frame
 100          * Get next from the buffer queue
 101          */
 102         layer->next_frm = list_entry(
 103                                 layer->dma_queue.next,
 104                                 struct  videobuf_buffer,
 105                                 queue);
 106         /* Remove that from the buffer queue */
 107         list_del(&layer->next_frm->queue);
 108         spin_unlock(&disp_obj->dma_queue_lock);
 109         /* Mark state of the frame to active */
 110         layer->next_frm->state = VIDEOBUF_ACTIVE;
 111         addr = videobuf_to_dma_contig(layer->next_frm);
 112         osd_device->ops.start_layer(osd_device,
 113                         layer->layer_info.id,
 114                         addr,
 115                         disp_obj->cbcr_ofst);
 116 }
 117
 118 /* interrupt service routine */
 119 static irqreturn_t venc_isr(int irq, void *arg)
 120 {
 121         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
 122         struct vpbe_layer *layer;
 123         static unsigned last_event;
 124         unsigned event = 0;
 125         int fid;
 126         int i;
 127
 128         if ((NULL == arg) || (NULL == disp_dev->dev[0]))
 129                 return IRQ_HANDLED;
 130
 131         if (venc_is_second_field(disp_dev))
 132                 event |= VENC_SECOND_FIELD;
 133         else
 134                 event |= VENC_FIRST_FIELD;
 135
 136         if (event == (last_event & ~VENC_END_OF_FRAME)) {
 137                 /*
 138                 * If the display is non-interlaced, then we need to flag the
 139                 * end-of-frame event at every interrupt regardless of the
 140                 * value of the FIDST bit.  We can conclude that the display is
 141                 * non-interlaced if the value of the FIDST bit is unchanged
 142                 * from the previous interrupt.
 143                 */
 144                 event |= VENC_END_OF_FRAME;
 145         } else if (event == VENC_SECOND_FIELD) {
 146                 /* end-of-frame for interlaced display */
 147                 event |= VENC_END_OF_FRAME;
 148         }
 149         last_event = event;
 150
 151         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
 152                 layer = disp_dev->dev[i];
 153                 /* If streaming is started in this layer */
 154                 if (!layer->started)
 155                         continue;
 156
 157                 if (layer->layer_first_int) {
 158                         layer->layer_first_int = 0;
 159                         continue;
 160                 }
 161                 /* Check the field format */
 162                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
 163                         (event & VENC_END_OF_FRAME)) {
 164                         /* Progressive mode */
 165
 166                         vpbe_isr_even_field(disp_dev, layer);
 167                         vpbe_isr_odd_field(disp_dev, layer);
 168                 } else {
 169                 /* Interlaced mode */
 170
 171                         layer->field_id ^= 1;
 172                         if (event & VENC_FIRST_FIELD)
 173                                 fid = 0;
 174                         else
 175                                 fid = 1;
 176
 177                         /*
 178                         * If field id does not match with store
 179                         * field id
 180                         */
 181                         if (fid != layer->field_id) {
 182                                 /* Make them in sync */
 183                                 layer->field_id = fid;
 184                                 continue;
 185                         }
 186                         /*
 187                         * device field id and local field id are
 188                         * in sync. If this is even field
 189                         */
 190                         if (0 == fid)
 191                                 vpbe_isr_even_field(disp_dev, layer);
 192                         else  /* odd field */
 193                                 vpbe_isr_odd_field(disp_dev, layer);
 194                 }
 195         }
 196
 197         return IRQ_HANDLED;
 198 }
 199
 200 /*
 201  * vpbe_buffer_prepare()
 202  * This is the callback function called from videobuf_qbuf() function
 203  * the buffer is prepared and user space virtual address is converted into
 204  * physical address
 205  */
 206 static int vpbe_buffer_prepare(struct videobuf_queue *q,
 207                                   struct videobuf_buffer *vb,
 208                                   enum v4l2_field field)
 209 {
 210         struct vpbe_fh *fh = q->priv_data;
 211         struct vpbe_layer *layer = fh->layer;
 212         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 213         unsigned long addr;
 214         int ret;
 215
 216         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 217                                 "vpbe_buffer_prepare\n");
 218
 219         /* If buffer is not initialized, initialize it */
 220         if (VIDEOBUF_NEEDS_INIT == vb->state) {
 221                 vb->width = layer->pix_fmt.width;
 222                 vb->height = layer->pix_fmt.height;
 223                 vb->size = layer->pix_fmt.sizeimage;
 224                 vb->field = field;
 225
 226                 ret = videobuf_iolock(q, vb, NULL);
 227                 if (ret < 0) {
 228                         v4l2_err(&vpbe_dev->v4l2_dev, "Failed to map \
 229                                 user address\n");
 230                         return -EINVAL;
 231                 }
 232
 233                 addr = videobuf_to_dma_contig(vb);
 234
 235                 if (q->streaming) {
 236                         if (!IS_ALIGNED(addr, 8)) {
 237                                 v4l2_err(&vpbe_dev->v4l2_dev,
 238                                         "buffer_prepare:offset is \
 239                                         not aligned to 32 bytes\n");
 240                                 return -EINVAL;
 241                         }
 242                 }
 243                 vb->state = VIDEOBUF_PREPARED;
 244         }
 245         return 0;
 246 }
 247
 248 /*
 249  * vpbe_buffer_setup()
 250  * This function allocates memory for the buffers
 251  */
 252 static int vpbe_buffer_setup(struct videobuf_queue *q,
 253                                 unsigned int *count,
 254                                 unsigned int *size)
 255 {
 256         /* Get the file handle object and layer object */
 257         struct vpbe_fh *fh = q->priv_data;
 258         struct vpbe_layer *layer = fh->layer;
 259         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 260
 261         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 262
 263         *size = layer->pix_fmt.sizeimage;
 264
 265         /* Store number of buffers allocated in numbuffer member */
 266         if (*count < VPBE_DEFAULT_NUM_BUFS)
 267                 *count = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
 268
 269         return 0;
 270 }
 271
 272 /*
 273  * vpbe_buffer_queue()
 274  * This function adds the buffer to DMA queue
 275  */
 276 static void vpbe_buffer_queue(struct videobuf_queue *q,
 277                                  struct videobuf_buffer *vb)
 278 {
 279         /* Get the file handle object and layer object */
 280         struct vpbe_fh *fh = q->priv_data;
 281         struct vpbe_layer *layer = fh->layer;
 282         struct vpbe_display *disp = fh->disp_dev;
 283         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 284         unsigned long flags;
 285
 286         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 287                         "vpbe_buffer_queue\n");
 288
 289         /* add the buffer to the DMA queue */
 290         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 291         list_add_tail(&vb->queue, &layer->dma_queue);
 292         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 293         /* Change state of the buffer */
 294         vb->state = VIDEOBUF_QUEUED;
 295 }
 296
 297 /*
 298  * vpbe_buffer_release()
 299  * This function is called from the videobuf layer to free memory allocated to
 300  * the buffers
 301  */
 302 static void vpbe_buffer_release(struct videobuf_queue *q,
 303                                    struct videobuf_buffer *vb)
 304 {
 305         /* Get the file handle object and layer object */
 306         struct vpbe_fh *fh = q->priv_data;
 307         struct vpbe_layer *layer = fh->layer;
 308         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 309
 310         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 311                         "vpbe_buffer_release\n");
 312
 313         if (V4L2_MEMORY_USERPTR != layer->memory)
 314                 videobuf_dma_contig_free(q, vb);
 315
 316         vb->state = VIDEOBUF_NEEDS_INIT;
 317 }
 318
 319 static struct videobuf_queue_ops video_qops = {
 320         .buf_setup = vpbe_buffer_setup,
 321         .buf_prepare = vpbe_buffer_prepare,
 322         .buf_queue = vpbe_buffer_queue,
 323         .buf_release = vpbe_buffer_release,
 324 };
 325
 326 static
 327 struct vpbe_layer*
 328 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 329                         struct vpbe_layer *layer)
 330 {
 331         enum vpbe_display_device_id thiswin, otherwin;
 332         thiswin = layer->device_id;
 333
 334         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 335         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 336         return disp_dev->dev[otherwin];
 337 }
 338
 339 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 340                         struct vpbe_layer *layer)
 341 {
 342         struct osd_layer_config *cfg  = &layer->layer_info.config;
 343         struct osd_state *osd_device = disp_dev->osd_device;
 344         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 345         unsigned long addr;
 346         int ret;
 347
 348         addr = videobuf_to_dma_contig(layer->cur_frm);
 349         /* Set address in the display registers */
 350         osd_device->ops.start_layer(osd_device,
 351                                     layer->layer_info.id,
 352                                     addr,
 353                                     disp_dev->cbcr_ofst);
 354
 355         ret = osd_device->ops.enable_layer(osd_device,
 356                                 layer->layer_info.id, 0);
 357         if (ret < 0) {
 358                 v4l2_err(&vpbe_dev->v4l2_dev,
 359                         "Error in enabling osd window layer 0\n");
 360                 return -1;
 361         }
 362
 363         /* Enable the window */
 364         layer->layer_info.enable = 1;
 365         if (cfg->pixfmt == PIXFMT_NV12) {
 366                 struct vpbe_layer *otherlayer =
 367                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 368
 369                 ret = osd_device->ops.enable_layer(osd_device,
 370                                 otherlayer->layer_info.id, 1);
 371                 if (ret < 0) {
 372                         v4l2_err(&vpbe_dev->v4l2_dev,
 373                                 "Error in enabling osd window layer 1\n");
 374                         return -1;
 375                 }
 376                 otherlayer->layer_info.enable = 1;
 377         }
 378         return 0;
 379 }
 380
 381 static void
 382 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 383                         struct vpbe_layer *layer,
 384                         int expected_xsize, int expected_ysize)
 385 {
 386         struct display_layer_info *layer_info = &layer->layer_info;
 387         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 388         struct osd_layer_config *cfg  = &layer->layer_info.config;
 389         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 390         int calculated_xsize;
 391         int h_exp = 0;
 392         int v_exp = 0;
 393         int h_scale;
 394         int v_scale;
 395
 396         v4l2_std_id standard_id = vpbe_dev->current_timings.timings.std_id;
 397
 398         /*
 399          * Application initially set the image format. Current display
 400          * size is obtained from the vpbe display controller. expected_xsize
 401          * and expected_ysize are set through S_CROP ioctl. Based on this,
 402          * driver will calculate the scale factors for vertical and
 403          * horizontal direction so that the image is displayed scaled
 404          * and expanded. Application uses expansion to display the image
 405          * in a square pixel. Otherwise it is displayed using displays
 406          * pixel aspect ratio.It is expected that application chooses
 407          * the crop coordinates for cropped or scaled display. if crop
 408          * size is less than the image size, it is displayed cropped or
 409          * it is displayed scaled and/or expanded.
 410          *
 411          * to begin with, set the crop window same as expected. Later we
 412          * will override with scaled window size
 413          */
 414
 415         cfg->xsize = pixfmt->width;
 416         cfg->ysize = pixfmt->height;
 417         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 418         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 419         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 420         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 421
 422         if (pixfmt->width < expected_xsize) {
 423                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 424                 if (h_scale < 2)
 425                         h_scale = 1;
 426                 else if (h_scale >= 4)
 427                         h_scale = 4;
 428                 else
 429                         h_scale = 2;
 430                 cfg->xsize *= h_scale;
 431                 if (cfg->xsize < expected_xsize) {
 432                         if ((standard_id & V4L2_STD_525_60) ||
 433                         (standard_id & V4L2_STD_625_50)) {
 434                                 calculated_xsize = (cfg->xsize *
 435                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 436                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 437                                 if (calculated_xsize <= expected_xsize) {
 438                                         h_exp = 1;
 439                                         cfg->xsize = calculated_xsize;
 440                                 }
 441                         }
 442                 }
 443                 if (h_scale == 2)
 444                         layer_info->h_zoom = ZOOM_X2;
 445                 else if (h_scale == 4)
 446                         layer_info->h_zoom = ZOOM_X4;
 447                 if (h_exp)
 448                         layer_info->h_exp = H_EXP_9_OVER_8;
 449         } else {
 450                 /* no scaling, only cropping. Set display area to crop area */
 451                 cfg->xsize = expected_xsize;
 452         }
 453
 454         if (pixfmt->height < expected_ysize) {
 455                 v_scale = expected_ysize / pixfmt->height;
 456                 if (v_scale < 2)
 457                         v_scale = 1;
 458                 else if (v_scale >= 4)
 459                         v_scale = 4;
 460                 else
 461                         v_scale = 2;
 462                 cfg->ysize *= v_scale;
 463                 if (cfg->ysize < expected_ysize) {
 464                         if ((standard_id & V4L2_STD_625_50)) {
 465                                 calculated_xsize = (cfg->ysize *
 466                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 467                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 468                                 if (calculated_xsize <= expected_ysize) {
 469                                         v_exp = 1;
 470                                         cfg->ysize = calculated_xsize;
 471                                 }
 472                         }
 473                 }
 474                 if (v_scale == 2)
 475                         layer_info->v_zoom = ZOOM_X2;
 476                 else if (v_scale == 4)
 477                         layer_info->v_zoom = ZOOM_X4;
 478                 if (v_exp)
 479                         layer_info->h_exp = V_EXP_6_OVER_5;
 480         } else {
 481                 /* no scaling, only cropping. Set display area to crop area */
 482                 cfg->ysize = expected_ysize;
 483         }
 484         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 485                 "crop display xsize = %d, ysize = %d\n",
 486                 cfg->xsize, cfg->ysize);
 487 }
 488
 489 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 490                         struct vpbe_layer *layer,
 491                         int top, int left)
 492 {
 493         struct osd_layer_config *cfg = &layer->layer_info.config;
 494         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 495
 496         cfg->xpos = min((unsigned int)left,
 497                         vpbe_dev->current_timings.xres - cfg->xsize);
 498         cfg->ypos = min((unsigned int)top,
 499                         vpbe_dev->current_timings.yres - cfg->ysize);
 500
 501         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 502                 "new xpos = %d, ypos = %d\n",
 503                 cfg->xpos, cfg->ypos);
 504 }
 505
 506 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 507                         struct v4l2_rect *c)
 508 {
 509         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 510
 511         if ((c->width == 0) ||
 512           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 513                 c->width = vpbe_dev->current_timings.xres - c->left;
 514
 515         if ((c->height == 0) || ((c->height + c->top) >
 516           vpbe_dev->current_timings.yres))
 517                 c->height = vpbe_dev->current_timings.yres - c->top;
 518
 519         /* window height must be even for interlaced display */
 520         if (vpbe_dev->current_timings.interlaced)
 521                 c->height &= (~0x01);
 522
 523 }
 524
 525 /**
 526  * vpbe_try_format()
 527  * If user application provides width and height, and have bytesperline set
 528  * to zero, driver calculates bytesperline and sizeimage based on hardware
 529  * limits.
 530  */
 531 static int vpbe_try_format(struct vpbe_display *disp_dev,
 532                         struct v4l2_pix_format *pixfmt, int check)
 533 {
 534         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 535         int min_height = 1;
 536         int min_width = 32;
 537         int max_height;
 538         int max_width;
 539         int bpp;
 540
 541         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 542             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 543                 /* choose default as V4L2_PIX_FMT_UYVY */
 544                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 545
 546         /* Check the field format */
 547         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 548                 (pixfmt->field != V4L2_FIELD_NONE)) {
 549                 if (vpbe_dev->current_timings.interlaced)
 550                         pixfmt->field = V4L2_FIELD_INTERLACED;
 551                 else
 552                         pixfmt->field = V4L2_FIELD_NONE;
 553         }
 554
 555         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 556                 min_height = 2;
 557
 558         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 559                 bpp = 1;
 560         else
 561                 bpp = 2;
 562
 563         max_width = vpbe_dev->current_timings.xres;
 564         max_height = vpbe_dev->current_timings.yres;
 565
 566         min_width /= bpp;
 567
 568         if (!pixfmt->width || (pixfmt->width < min_width) ||
 569                 (pixfmt->width > max_width)) {
 570                 pixfmt->width = vpbe_dev->current_timings.xres;
 571         }
 572
 573         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 574                 (pixfmt->height  > max_height)) {
 575                 pixfmt->height = vpbe_dev->current_timings.yres;
 576         }
 577
 578         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 579                 pixfmt->bytesperline = pixfmt->width * bpp;
 580
 581         /* Make the bytesperline 32 byte aligned */
 582         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 583
 584         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 585                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 586                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 587         else
 588                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 589
 590         return 0;
 591 }
 592
 593 static int vpbe_display_g_priority(struct file *file, void *priv,
 594                                 enum v4l2_priority *p)
 595 {
 596         struct vpbe_fh *fh = file->private_data;
 597         struct vpbe_layer *layer = fh->layer;
 598
 599         *p = v4l2_prio_max(&layer->prio);
 600
 601         return 0;
 602 }
 603
 604 static int vpbe_display_s_priority(struct file *file, void *priv,
 605                                 enum v4l2_priority p)
 606 {
 607         struct vpbe_fh *fh = file->private_data;
 608         struct vpbe_layer *layer = fh->layer;
 609         int ret;
 610
 611         ret = v4l2_prio_change(&layer->prio, &fh->prio, p);
 612
 613         return ret;
 614 }
 615
 616 static int vpbe_display_querycap(struct file *file, void  *priv,
 617                                struct v4l2_capability *cap)
 618 {
 619         struct vpbe_fh *fh = file->private_data;
 620         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 621
 622         cap->version = VPBE_DISPLAY_VERSION_CODE;
 623         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 624         strlcpy(cap->driver, VPBE_DISPLAY_DRIVER, sizeof(cap->driver));
 625         strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
 626         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 627
 628         return 0;
 629 }
 630
 631 static int vpbe_display_s_crop(struct file *file, void *priv,
 632                              struct v4l2_crop *crop)
 633 {
 634         struct vpbe_fh *fh = file->private_data;
 635         struct vpbe_layer *layer = fh->layer;
 636         struct vpbe_display *disp_dev = fh->disp_dev;
 637         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 638         struct osd_layer_config *cfg = &layer->layer_info.config;
 639         struct osd_state *osd_device = disp_dev->osd_device;
 640         struct v4l2_rect *rect = &crop->c;
 641         int ret;
 642
 643         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 644                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 645
 646         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 647                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 648                 return -EINVAL;
 649         }
 650
 651         if (rect->top < 0)
 652                 rect->top = 0;
 653         if (rect->left < 0)
 654                 rect->left = 0;
 655
 656         vpbe_disp_check_window_params(disp_dev, rect);
 657
 658         osd_device->ops.get_layer_config(osd_device,
 659                         layer->layer_info.id, cfg);
 660
 661         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 662                                         rect->width,
 663                                         rect->height);
 664         vpbe_disp_adj_position(disp_dev, layer, rect->top,
 665                                         rect->left);
 666         ret = osd_device->ops.set_layer_config(osd_device,
 667                                 layer->layer_info.id, cfg);
 668         if (ret < 0) {
 669                 v4l2_err(&vpbe_dev->v4l2_dev,
 670                         "Error in set layer config:\n");
 671                 return -EINVAL;
 672         }
 673
 674         /* apply zooming and h or v expansion */
 675         osd_device->ops.set_zoom(osd_device,
 676                         layer->layer_info.id,
 677                         layer->layer_info.h_zoom,
 678                         layer->layer_info.v_zoom);
 679         ret = osd_device->ops.set_vid_expansion(osd_device,
 680                         layer->layer_info.h_exp,
 681                         layer->layer_info.v_exp);
 682         if (ret < 0) {
 683                 v4l2_err(&vpbe_dev->v4l2_dev,
 684                 "Error in set vid expansion:\n");
 685                 return -EINVAL;
 686         }
 687
 688         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 689                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 690                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 691                 (layer->layer_info.v_exp != V_EXP_OFF))
 692                 /* Enable expansion filter */
 693                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 694         else
 695                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 696
 697         return 0;
 698 }
 699
 700 static int vpbe_display_g_crop(struct file *file, void *priv,
 701                              struct v4l2_crop *crop)
 702 {
 703         struct vpbe_fh *fh = file->private_data;
 704         struct vpbe_layer *layer = fh->layer;
 705         struct osd_layer_config *cfg = &layer->layer_info.config;
 706         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 707         struct osd_state *osd_device = fh->disp_dev->osd_device;
 708         struct v4l2_rect *rect = &crop->c;
 709         int ret;
 710
 711         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 712                         "VIDIOC_G_CROP, layer id = %d\n",
 713                         layer->device_id);
 714
 715         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 716                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 717                 ret = -EINVAL;
 718         }
 719         osd_device->ops.get_layer_config(osd_device,
 720                                 layer->layer_info.id, cfg);
 721         rect->top = cfg->ypos;
 722         rect->left = cfg->xpos;
 723         rect->width = cfg->xsize;
 724         rect->height = cfg->ysize;
 725
 726         return 0;
 727 }
 728
 729 static int vpbe_display_cropcap(struct file *file, void *priv,
 730                               struct v4l2_cropcap *cropcap)
 731 {
 732         struct vpbe_fh *fh = file->private_data;
 733         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 734
 735         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 736
 737         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 738         cropcap->bounds.left = 0;
 739         cropcap->bounds.top = 0;
 740         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 741         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 742         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 743         cropcap->defrect = cropcap->bounds;
 744         return 0;
 745 }
 746
 747 static int vpbe_display_g_fmt(struct file *file, void *priv,
 748                                 struct v4l2_format *fmt)
 749 {
 750         struct vpbe_fh *fh = file->private_data;
 751         struct vpbe_layer *layer = fh->layer;
 752         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 753
 754         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 755                         "VIDIOC_G_FMT, layer id = %d\n",
 756                         layer->device_id);
 757
 758         /* If buffer type is video output */
 759         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 760                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 761                 return -EINVAL;
 762         }
 763         /* Fill in the information about format */
 764         fmt->fmt.pix = layer->pix_fmt;
 765
 766         return 0;
 767 }
 768
 769 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 770                                    struct v4l2_fmtdesc *fmt)
 771 {
 772         struct vpbe_fh *fh = file->private_data;
 773         struct vpbe_layer *layer = fh->layer;
 774         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 775         unsigned int index = 0;
 776
 777         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 778                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 779                                 layer->device_id);
 780         if (fmt->index > 1) {
 781                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 782                 return -EINVAL;
 783         }
 784
 785         /* Fill in the information about format */
 786         index = fmt->index;
 787         memset(fmt, 0, sizeof(*fmt));
 788         fmt->index = index;
 789         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 790         if (index == 0) {
 791                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 792                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 793         } else {
 794                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 795                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 796         }
 797
 798         return 0;
 799 }
 800
 801 static int vpbe_display_s_fmt(struct file *file, void *priv,
 802                                 struct v4l2_format *fmt)
 803 {
 804         struct vpbe_fh *fh = file->private_data;
 805         struct vpbe_layer *layer = fh->layer;
 806         struct vpbe_display *disp_dev = fh->disp_dev;
 807         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 808         struct osd_layer_config *cfg  = &layer->layer_info.config;
 809         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 810         struct osd_state *osd_device = disp_dev->osd_device;
 811         int ret;
 812
 813         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 814                         "VIDIOC_S_FMT, layer id = %d\n",
 815                         layer->device_id);
 816
 817         /* If streaming is started, return error */
 818         if (layer->started) {
 819                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 820                 return -EBUSY;
 821         }
 822         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 823                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 824                 return -EINVAL;
 825         }
 826         /* Check for valid pixel format */
 827         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 828         if (ret)
 829                 return ret;
 830
 831         /* YUV420 is requested, check availability of the
 832         other video window */
 833
 834         layer->pix_fmt = *pixfmt;
 835
 836         /* Get osd layer config */
 837         osd_device->ops.get_layer_config(osd_device,
 838                         layer->layer_info.id, cfg);
 839         /* Store the pixel format in the layer object */
 840         cfg->xsize = pixfmt->width;
 841         cfg->ysize = pixfmt->height;
 842         cfg->line_length = pixfmt->bytesperline;
 843         cfg->ypos = 0;
 844         cfg->xpos = 0;
 845         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 846
 847         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 848                 cfg->pixfmt = PIXFMT_YCbCrI;
 849
 850         /* Change of the default pixel format for both video windows */
 851         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 852                 struct vpbe_layer *otherlayer;
 853                 cfg->pixfmt = PIXFMT_NV12;
 854                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 855                                                                 layer);
 856                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 857         }
 858
 859         /* Set the layer config in the osd window */
 860         ret = osd_device->ops.set_layer_config(osd_device,
 861                                 layer->layer_info.id, cfg);
 862         if (ret < 0) {
 863                 v4l2_err(&vpbe_dev->v4l2_dev,
 864                                 "Error in S_FMT params:\n");
 865                 return -EINVAL;
 866         }
 867
 868         /* Readback and fill the local copy of current pix format */
 869         osd_device->ops.get_layer_config(osd_device,
 870                         layer->layer_info.id, cfg);
 871
 872         return 0;
 873 }
 874
 875 static int vpbe_display_try_fmt(struct file *file, void *priv,
 876                                   struct v4l2_format *fmt)
 877 {
 878         struct vpbe_fh *fh = file->private_data;
 879         struct vpbe_display *disp_dev = fh->disp_dev;
 880         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 881         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 882
 883         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 884
 885         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 886                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 887                 return -EINVAL;
 888         }
 889
 890         /* Check for valid field format */
 891         return  vpbe_try_format(disp_dev, pixfmt, 0);
 892
 893 }
 894
 895 /**
 896  * vpbe_display_s_std - Set the given standard in the encoder
 897  *
 898  * Sets the standard if supported by the current encoder. Return the status.
 899  * 0 - success & -EINVAL on error
 900  */
 901 static int vpbe_display_s_std(struct file *file, void *priv,
 902                                 v4l2_std_id *std_id)
 903 {
 904         struct vpbe_fh *fh = priv;
 905         struct vpbe_layer *layer = fh->layer;
 906         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 907         int ret;
 908
 909         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
 910
 911         /* If streaming is started, return error */
 912         if (layer->started) {
 913                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 914                 return -EBUSY;
 915         }
 916         if (NULL != vpbe_dev->ops.s_std) {
 917                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
 918                 if (ret) {
 919                         v4l2_err(&vpbe_dev->v4l2_dev,
 920                         "Failed to set standard for sub devices\n");
 921                         return -EINVAL;
 922                 }
 923         } else {
 924                 return -EINVAL;
 925         }
 926
 927         return 0;
 928 }
 929
 930 /**
 931  * vpbe_display_g_std - Get the standard in the current encoder
 932  *
 933  * Get the standard in the current encoder. Return the status. 0 - success
 934  * -EINVAL on error
 935  */
 936 static int vpbe_display_g_std(struct file *file, void *priv,
 937                                 v4l2_std_id *std_id)
 938 {
 939         struct vpbe_fh *fh = priv;
 940         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 941
 942         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
 943
 944         /* Get the standard from the current encoder */
 945         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
 946                 *std_id = vpbe_dev->current_timings.timings.std_id;
 947                 return 0;
 948         }
 949
 950         return -EINVAL;
 951 }
 952
 953 /**
 954  * vpbe_display_enum_output - enumerate outputs
 955  *
 956  * Enumerates the outputs available at the vpbe display
 957  * returns the status, -EINVAL if end of output list
 958  */
 959 static int vpbe_display_enum_output(struct file *file, void *priv,
 960                                     struct v4l2_output *output)
 961 {
 962         struct vpbe_fh *fh = priv;
 963         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 964         int ret;
 965
 966         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
 967
 968         /* Enumerate outputs */
 969
 970         if (NULL == vpbe_dev->ops.enum_outputs)
 971                 return -EINVAL;
 972
 973         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
 974         if (ret) {
 975                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 976                         "Failed to enumerate outputs\n");
 977                 return -EINVAL;
 978         }
 979
 980         return 0;
 981 }
 982
 983 /**
 984  * vpbe_display_s_output - Set output to
 985  * the output specified by the index
 986  */
 987 static int vpbe_display_s_output(struct file *file, void *priv,
 988                                 unsigned int i)
 989 {
 990         struct vpbe_fh *fh = priv;
 991         struct vpbe_layer *layer = fh->layer;
 992         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 993         int ret;
 994
 995         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
 996         /* If streaming is started, return error */
 997         if (layer->started) {
 998                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 999                 return -EBUSY;
1000         }
1001         if (NULL == vpbe_dev->ops.set_output)
1002                 return -EINVAL;
1003
1004         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1005         if (ret) {
1006                 v4l2_err(&vpbe_dev->v4l2_dev,
1007                         "Failed to set output for sub devices\n");
1008                 return -EINVAL;
1009         }
1010
1011         return 0;
1012 }
1013
1014 /**
1015  * vpbe_display_g_output - Get output from subdevice
1016  * for a given by the index
1017  */
1018 static int vpbe_display_g_output(struct file *file, void *priv,
1019                                 unsigned int *i)
1020 {
1021         struct vpbe_fh *fh = priv;
1022         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1023
1024         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1025         /* Get the standard from the current encoder */
1026         *i = vpbe_dev->current_out_index;
1027
1028         return 0;
1029 }
1030
1031 /**
1032  * vpbe_display_enum_dv_presets - Enumerate the dv presets
1033  *
1034  * enum the preset in the current encoder. Return the status. 0 - success
1035  * -EINVAL on error
1036  */
1037 static int
1038 vpbe_display_enum_dv_presets(struct file *file, void *priv,
1039                         struct v4l2_dv_enum_preset *preset)
1040 {
1041         struct vpbe_fh *fh = priv;
1042         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1043         int ret;
1044
1045         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_PRESETS\n");
1046
1047         /* Enumerate outputs */
1048         if (NULL == vpbe_dev->ops.enum_dv_presets)
1049                 return -EINVAL;
1050
1051         ret = vpbe_dev->ops.enum_dv_presets(vpbe_dev, preset);
1052         if (ret) {
1053                 v4l2_err(&vpbe_dev->v4l2_dev,
1054                         "Failed to enumerate dv presets info\n");
1055                 return -EINVAL;
1056         }
1057
1058         return 0;
1059 }
1060
1061 /**
1062  * vpbe_display_s_dv_preset - Set the dv presets
1063  *
1064  * Set the preset in the current encoder. Return the status. 0 - success
1065  * -EINVAL on error
1066  */
1067 static int
1068 vpbe_display_s_dv_preset(struct file *file, void *priv,
1069                                 struct v4l2_dv_preset *preset)
1070 {
1071         struct vpbe_fh *fh = priv;
1072         struct vpbe_layer *layer = fh->layer;
1073         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1074         int ret;
1075
1076         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_PRESETS\n");
1077
1078
1079         /* If streaming is started, return error */
1080         if (layer->started) {
1081                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1082                 return -EBUSY;
1083         }
1084
1085         /* Set the given standard in the encoder */
1086         if (!vpbe_dev->ops.s_dv_preset)
1087                 return -EINVAL;
1088
1089         ret = vpbe_dev->ops.s_dv_preset(vpbe_dev, preset);
1090         if (ret) {
1091                 v4l2_err(&vpbe_dev->v4l2_dev,
1092                         "Failed to set the dv presets info\n");
1093                 return -EINVAL;
1094         }
1095         /* set the current norm to zero to be consistent. If STD is used
1096          * v4l2 layer will set the norm properly on successful s_std call
1097          */
1098         layer->video_dev.current_norm = 0;
1099
1100         return 0;
1101 }
1102
1103 /**
1104  * vpbe_display_g_dv_preset - Set the dv presets
1105  *
1106  * Get the preset in the current encoder. Return the status. 0 - success
1107  * -EINVAL on error
1108  */
1109 static int
1110 vpbe_display_g_dv_preset(struct file *file, void *priv,
1111                                 struct v4l2_dv_preset *dv_preset)
1112 {
1113         struct vpbe_fh *fh = priv;
1114         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1115
1116         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_PRESETS\n");
1117
1118         /* Get the given standard in the encoder */
1119
1120         if (vpbe_dev->current_timings.timings_type &
1121                                 VPBE_ENC_DV_PRESET) {
1122                 dv_preset->preset =
1123                         vpbe_dev->current_timings.timings.dv_preset;
1124         } else {
1125                 return -EINVAL;
1126         }
1127
1128         return 0;
1129 }
1130
1131 static int vpbe_display_streamoff(struct file *file, void *priv,
1132                                 enum v4l2_buf_type buf_type)
1133 {
1134         struct vpbe_fh *fh = file->private_data;
1135         struct vpbe_layer *layer = fh->layer;
1136         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1137         struct osd_state *osd_device = fh->disp_dev->osd_device;
1138         int ret;
1139
1140         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1141                         "VIDIOC_STREAMOFF,layer id = %d\n",
1142                         layer->device_id);
1143
1144         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1145                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1146                 return -EINVAL;
1147         }
1148
1149         /* If io is allowed for this file handle, return error */
1150         if (!fh->io_allowed) {
1151                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1152                 return -EACCES;
1153         }
1154
1155         /* If streaming is not started, return error */
1156         if (!layer->started) {
1157                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1158                         " id = %d\n", layer->device_id);
1159                 return -EINVAL;
1160         }
1161
1162         osd_device->ops.disable_layer(osd_device,
1163                         layer->layer_info.id);
1164         layer->started = 0;
1165         ret = videobuf_streamoff(&layer->buffer_queue);
1166
1167         return ret;
1168 }
1169
1170 static int vpbe_display_streamon(struct file *file, void *priv,
1171                          enum v4l2_buf_type buf_type)
1172 {
1173         struct vpbe_fh *fh = file->private_data;
1174         struct vpbe_layer *layer = fh->layer;
1175         struct vpbe_display *disp_dev = fh->disp_dev;
1176         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1177         struct osd_state *osd_device = disp_dev->osd_device;
1178         int ret;
1179
1180         osd_device->ops.disable_layer(osd_device,
1181                         layer->layer_info.id);
1182
1183         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1184                                                 layer->device_id);
1185
1186         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1187                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1188                 return -EINVAL;
1189         }
1190
1191         /* If file handle is not allowed IO, return error */
1192         if (!fh->io_allowed) {
1193                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1194                 return -EACCES;
1195         }
1196         /* If Streaming is already started, return error */
1197         if (layer->started) {
1198                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1199                 return -EBUSY;
1200         }
1201
1202         /*
1203          * Call videobuf_streamon to start streaming
1204          * in videobuf
1205          */
1206         ret = videobuf_streamon(&layer->buffer_queue);
1207         if (ret) {
1208                 v4l2_err(&vpbe_dev->v4l2_dev,
1209                 "error in videobuf_streamon\n");
1210                 return ret;
1211         }
1212         /* If buffer queue is empty, return error */
1213         if (list_empty(&layer->dma_queue)) {
1214                 v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
1215                 goto streamoff;
1216         }
1217         /* Get the next frame from the buffer queue */
1218         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
1219                                 struct videobuf_buffer, queue);
1220         /* Remove buffer from the buffer queue */
1221         list_del(&layer->cur_frm->queue);
1222         /* Mark state of the current frame to active */
1223         layer->cur_frm->state = VIDEOBUF_ACTIVE;
1224         /* Initialize field_id and started member */
1225         layer->field_id = 0;
1226
1227         /* Set parameters in OSD and VENC */
1228         ret = vpbe_set_osd_display_params(disp_dev, layer);
1229         if (ret < 0)
1230                 goto streamoff;
1231
1232         /*
1233          * if request format is yuv420 semiplanar, need to
1234          * enable both video windows
1235          */
1236         layer->started = 1;
1237
1238         layer->layer_first_int = 1;
1239
1240         return ret;
1241 streamoff:
1242         ret = videobuf_streamoff(&layer->buffer_queue);
1243         return ret;
1244 }
1245
1246 static int vpbe_display_dqbuf(struct file *file, void *priv,
1247                       struct v4l2_buffer *buf)
1248 {
1249         struct vpbe_fh *fh = file->private_data;
1250         struct vpbe_layer *layer = fh->layer;
1251         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1252         int ret;
1253
1254         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1255                 "VIDIOC_DQBUF, layer id = %d\n",
1256                 layer->device_id);
1257
1258         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1259                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1260                 return -EINVAL;
1261         }
1262         /* If this file handle is not allowed to do IO, return error */
1263         if (!fh->io_allowed) {
1264                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1265                 return -EACCES;
1266         }
1267         if (file->f_flags & O_NONBLOCK)
1268                 /* Call videobuf_dqbuf for non blocking mode */
1269                 ret = videobuf_dqbuf(&layer->buffer_queue, buf, 1);
1270         else
1271                 /* Call videobuf_dqbuf for blocking mode */
1272                 ret = videobuf_dqbuf(&layer->buffer_queue, buf, 0);
1273
1274         return ret;
1275 }
1276
1277 static int vpbe_display_qbuf(struct file *file, void *priv,
1278                      struct v4l2_buffer *p)
1279 {
1280         struct vpbe_fh *fh = file->private_data;
1281         struct vpbe_layer *layer = fh->layer;
1282         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1283
1284         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1285                 "VIDIOC_QBUF, layer id = %d\n",
1286                 layer->device_id);
1287
1288         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1289                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1290                 return -EINVAL;
1291         }
1292
1293         /* If this file handle is not allowed to do IO, return error */
1294         if (!fh->io_allowed) {
1295                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1296                 return -EACCES;
1297         }
1298
1299         return videobuf_qbuf(&layer->buffer_queue, p);
1300 }
1301
1302 static int vpbe_display_querybuf(struct file *file, void *priv,
1303                          struct v4l2_buffer *buf)
1304 {
1305         struct vpbe_fh *fh = file->private_data;
1306         struct vpbe_layer *layer = fh->layer;
1307         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1308         int ret;
1309
1310         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1311                 "VIDIOC_QUERYBUF, layer id = %d\n",
1312                 layer->device_id);
1313
1314         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1315                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1316                 return -EINVAL;
1317         }
1318
1319         /* Call videobuf_querybuf to get information */
1320         ret = videobuf_querybuf(&layer->buffer_queue, buf);
1321
1322         return ret;
1323 }
1324
1325 static int vpbe_display_reqbufs(struct file *file, void *priv,
1326                         struct v4l2_requestbuffers *req_buf)
1327 {
1328         struct vpbe_fh *fh = file->private_data;
1329         struct vpbe_layer *layer = fh->layer;
1330         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1331         int ret;
1332
1333         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1334
1335         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1336                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1337                 return -EINVAL;
1338         }
1339
1340         /* If io users of the layer is not zero, return error */
1341         if (0 != layer->io_usrs) {
1342                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1343                 return -EBUSY;
1344         }
1345         /* Initialize videobuf queue as per the buffer type */
1346         videobuf_queue_dma_contig_init(&layer->buffer_queue,
1347                                 &video_qops,
1348                                 vpbe_dev->pdev,
1349                                 &layer->irqlock,
1350                                 V4L2_BUF_TYPE_VIDEO_OUTPUT,
1351                                 layer->pix_fmt.field,
1352                                 sizeof(struct videobuf_buffer),
1353                                 fh, NULL);
1354
1355         /* Set io allowed member of file handle to TRUE */
1356         fh->io_allowed = 1;
1357         /* Increment io usrs member of layer object to 1 */
1358         layer->io_usrs = 1;
1359         /* Store type of memory requested in layer object */
1360         layer->memory = req_buf->memory;
1361         /* Initialize buffer queue */
1362         INIT_LIST_HEAD(&layer->dma_queue);
1363         /* Allocate buffers */
1364         ret = videobuf_reqbufs(&layer->buffer_queue, req_buf);
1365
1366         return ret;
1367 }
1368
1369 /*
1370  * vpbe_display_mmap()
1371  * It is used to map kernel space buffers into user spaces
1372  */
1373 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1374 {
1375         /* Get the layer object and file handle object */
1376         struct vpbe_fh *fh = filep->private_data;
1377         struct vpbe_layer *layer = fh->layer;
1378         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1379
1380         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1381
1382         return videobuf_mmap_mapper(&layer->buffer_queue, vma);
1383 }
1384
1385 /* vpbe_display_poll(): It is used for select/poll system call
1386  */
1387 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1388 {
1389         struct vpbe_fh *fh = filep->private_data;
1390         struct vpbe_layer *layer = fh->layer;
1391         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1392         unsigned int err = 0;
1393
1394         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1395         if (layer->started)
1396                 err = videobuf_poll_stream(filep, &layer->buffer_queue, wait);
1397         return err;
1398 }
1399
1400 /*
1401  * vpbe_display_open()
1402  * It creates object of file handle structure and stores it in private_data
1403  * member of filepointer
1404  */
1405 static int vpbe_display_open(struct file *file)
1406 {
1407         struct vpbe_fh *fh = NULL;
1408         struct vpbe_layer *layer = video_drvdata(file);
1409         struct vpbe_display *disp_dev = layer->disp_dev;
1410         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1411         struct osd_state *osd_device = disp_dev->osd_device;
1412         int err;
1413
1414         /* Allocate memory for the file handle object */
1415         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1416         if (fh == NULL) {
1417                 v4l2_err(&vpbe_dev->v4l2_dev,
1418                         "unable to allocate memory for file handle object\n");
1419                 return -ENOMEM;
1420         }
1421         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1422                         "vpbe display open plane = %d\n",
1423                         layer->device_id);
1424
1425         /* store pointer to fh in private_data member of filep */
1426         file->private_data = fh;
1427         fh->layer = layer;
1428         fh->disp_dev = disp_dev;
1429
1430         if (!layer->usrs) {
1431
1432                 /* First claim the layer for this device */
1433                 err = osd_device->ops.request_layer(osd_device,
1434                                                 layer->layer_info.id);
1435                 if (err < 0) {
1436                         /* Couldn't get layer */
1437                         v4l2_err(&vpbe_dev->v4l2_dev,
1438                                 "Display Manager failed to allocate layer\n");
1439                         kfree(fh);
1440                         return -EINVAL;
1441                 }
1442         }
1443         /* Increment layer usrs counter */
1444         layer->usrs++;
1445         /* Set io_allowed member to false */
1446         fh->io_allowed = 0;
1447         /* Initialize priority of this instance to default priority */
1448         fh->prio = V4L2_PRIORITY_UNSET;
1449         v4l2_prio_open(&layer->prio, &fh->prio);
1450         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1451                         "vpbe display device opened successfully\n");
1452         return 0;
1453 }
1454
1455 /*
1456  * vpbe_display_release()
1457  * This function deletes buffer queue, frees the buffers and the davinci
1458  * display file * handle
1459  */
1460 static int vpbe_display_release(struct file *file)
1461 {
1462         /* Get the layer object and file handle object */
1463         struct vpbe_fh *fh = file->private_data;
1464         struct vpbe_layer *layer = fh->layer;
1465         struct osd_layer_config *cfg  = &layer->layer_info.config;
1466         struct vpbe_display *disp_dev = fh->disp_dev;
1467         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1468         struct osd_state *osd_device = disp_dev->osd_device;
1469
1470         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1471
1472         /* if this instance is doing IO */
1473         if (fh->io_allowed) {
1474                 /* Reset io_usrs member of layer object */
1475                 layer->io_usrs = 0;
1476
1477                 osd_device->ops.disable_layer(osd_device,
1478                                 layer->layer_info.id);
1479                 layer->started = 0;
1480                 /* Free buffers allocated */
1481                 videobuf_queue_cancel(&layer->buffer_queue);
1482                 videobuf_mmap_free(&layer->buffer_queue);
1483         }
1484
1485         /* Decrement layer usrs counter */
1486         layer->usrs--;
1487         /* If this file handle has initialize encoder device, reset it */
1488         if (!layer->usrs) {
1489                 if (cfg->pixfmt == PIXFMT_NV12) {
1490                         struct vpbe_layer *otherlayer;
1491                         otherlayer =
1492                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1493                         osd_device->ops.disable_layer(osd_device,
1494                                         otherlayer->layer_info.id);
1495                         osd_device->ops.release_layer(osd_device,
1496                                         otherlayer->layer_info.id);
1497                 }
1498                 osd_device->ops.disable_layer(osd_device,
1499                                 layer->layer_info.id);
1500                 osd_device->ops.release_layer(osd_device,
1501                                 layer->layer_info.id);
1502         }
1503         /* Close the priority */
1504         v4l2_prio_close(&layer->prio, fh->prio);
1505         file->private_data = NULL;
1506
1507         /* Free memory allocated to file handle object */
1508         kfree(fh);
1509
1510         disp_dev->cbcr_ofst = 0;
1511
1512         return 0;
1513 }
1514
1515 #ifdef CONFIG_VIDEO_ADV_DEBUG
1516 static int vpbe_display_g_register(struct file *file, void *priv,
1517                         struct v4l2_dbg_register *reg)
1518 {
1519         struct v4l2_dbg_match *match = &reg->match;
1520
1521         if (match->type >= 2) {
1522                 v4l2_subdev_call(vpbe_dev->venc,
1523                                  core,
1524                                  g_register,
1525                                  reg);
1526         }
1527
1528         return 0;
1529 }
1530
1531 static int vpbe_display_s_register(struct file *file, void *priv,
1532                         struct v4l2_dbg_register *reg)
1533 {
1534         return 0;
1535 }
1536 #endif
1537
1538 /* vpbe capture ioctl operations */
1539 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1540         .vidioc_querycap         = vpbe_display_querycap,
1541         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1542         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1543         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1544         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1545         .vidioc_reqbufs          = vpbe_display_reqbufs,
1546         .vidioc_querybuf         = vpbe_display_querybuf,
1547         .vidioc_qbuf             = vpbe_display_qbuf,
1548         .vidioc_dqbuf            = vpbe_display_dqbuf,
1549         .vidioc_streamon         = vpbe_display_streamon,
1550         .vidioc_streamoff        = vpbe_display_streamoff,
1551         .vidioc_cropcap          = vpbe_display_cropcap,
1552         .vidioc_g_crop           = vpbe_display_g_crop,
1553         .vidioc_s_crop           = vpbe_display_s_crop,
1554         .vidioc_g_priority       = vpbe_display_g_priority,
1555         .vidioc_s_priority       = vpbe_display_s_priority,
1556         .vidioc_s_std            = vpbe_display_s_std,
1557         .vidioc_g_std            = vpbe_display_g_std,
1558         .vidioc_enum_output      = vpbe_display_enum_output,
1559         .vidioc_s_output         = vpbe_display_s_output,
1560         .vidioc_g_output         = vpbe_display_g_output,
1561         .vidioc_s_dv_preset      = vpbe_display_s_dv_preset,
1562         .vidioc_g_dv_preset      = vpbe_display_g_dv_preset,
1563         .vidioc_enum_dv_presets  = vpbe_display_enum_dv_presets,
1564 #ifdef CONFIG_VIDEO_ADV_DEBUG
1565         .vidioc_g_register       = vpbe_display_g_register,
1566         .vidioc_s_register       = vpbe_display_s_register,
1567 #endif
1568 };
1569
1570 static struct v4l2_file_operations vpbe_fops = {
1571         .owner = THIS_MODULE,
1572         .open = vpbe_display_open,
1573         .release = vpbe_display_release,
1574         .unlocked_ioctl = video_ioctl2,
1575         .mmap = vpbe_display_mmap,
1576         .poll = vpbe_display_poll
1577 };
1578
1579 static int vpbe_device_get(struct device *dev, void *data)
1580 {
1581         struct platform_device *pdev = to_platform_device(dev);
1582         struct vpbe_display *vpbe_disp  = data;
1583
1584         if (strcmp("vpbe_controller", pdev->name) == 0)
1585                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1586
1587         if (strcmp("vpbe-osd", pdev->name) == 0)
1588                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1589
1590         return 0;
1591 }
1592
1593 static __devinit int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1594                                      struct platform_device *pdev)
1595 {
1596         struct vpbe_layer *vpbe_display_layer = NULL;
1597         struct video_device *vbd = NULL;
1598
1599         /* Allocate memory for four plane display objects */
1600
1601         disp_dev->dev[i] =
1602                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1603
1604         /* If memory allocation fails, return error */
1605         if (!disp_dev->dev[i]) {
1606                 printk(KERN_ERR "ran out of memory\n");
1607                 return  -ENOMEM;
1608         }
1609         spin_lock_init(&disp_dev->dev[i]->irqlock);
1610         mutex_init(&disp_dev->dev[i]->opslock);
1611
1612         /* Get the pointer to the layer object */
1613         vpbe_display_layer = disp_dev->dev[i];
1614         vbd = &vpbe_display_layer->video_dev;
1615         /* Initialize field of video device */
1616         vbd->release    = video_device_release_empty;
1617         vbd->fops       = &vpbe_fops;
1618         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1619         vbd->minor      = -1;
1620         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1621         /* Locking in file operations other than ioctl should be done
1622            by the driver, not the V4L2 core.
1623            This driver needs auditing so that this flag can be removed. */
1624         set_bit(V4L2_FL_LOCK_ALL_FOPS, &vbd->flags);
1625         vbd->lock       = &vpbe_display_layer->opslock;
1626
1627         if (disp_dev->vpbe_dev->current_timings.timings_type &
1628                         VPBE_ENC_STD) {
1629                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1630                 vbd->current_norm =
1631                         disp_dev->vpbe_dev->
1632                         current_timings.timings.std_id;
1633         } else
1634                 vbd->current_norm = 0;
1635
1636         snprintf(vbd->name, sizeof(vbd->name),
1637                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1638                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1639                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1640                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1641
1642         vpbe_display_layer->device_id = i;
1643
1644         vpbe_display_layer->layer_info.id =
1645                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1646
1647         /* Initialize prio member of layer object */
1648         v4l2_prio_init(&vpbe_display_layer->prio);
1649
1650         return 0;
1651 }
1652
1653 static __devinit int register_device(struct vpbe_layer *vpbe_display_layer,
1654                                         struct vpbe_display *disp_dev,
1655                                         struct platform_device *pdev) {
1656         int err;
1657
1658         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1659                   "Trying to register VPBE display device.\n");
1660         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1661                   "layer=%x,layer->video_dev=%x\n",
1662                   (int)vpbe_display_layer,
1663                   (int)&vpbe_display_layer->video_dev);
1664
1665         err = video_register_device(&vpbe_display_layer->video_dev,
1666                                     VFL_TYPE_GRABBER,
1667                                     -1);
1668         if (err)
1669                 return -ENODEV;
1670
1671         vpbe_display_layer->disp_dev = disp_dev;
1672         /* set the driver data in platform device */
1673         platform_set_drvdata(pdev, disp_dev);
1674         video_set_drvdata(&vpbe_display_layer->video_dev,
1675                           vpbe_display_layer);
1676
1677         return 0;
1678 }
1679
1680
1681
1682 /*
1683  * vpbe_display_probe()
1684  * This function creates device entries by register itself to the V4L2 driver
1685  * and initializes fields of each layer objects
1686  */
1687 static __devinit int vpbe_display_probe(struct platform_device *pdev)
1688 {
1689         struct vpbe_layer *vpbe_display_layer;
1690         struct vpbe_display *disp_dev;
1691         struct resource *res = NULL;
1692         int k;
1693         int i;
1694         int err;
1695         int irq;
1696
1697         printk(KERN_DEBUG "vpbe_display_probe\n");
1698         /* Allocate memory for vpbe_display */
1699         disp_dev = kzalloc(sizeof(struct vpbe_display), GFP_KERNEL);
1700         if (!disp_dev) {
1701                 printk(KERN_ERR "ran out of memory\n");
1702                 return -ENOMEM;
1703         }
1704
1705         spin_lock_init(&disp_dev->dma_queue_lock);
1706         /*
1707          * Scan all the platform devices to find the vpbe
1708          * controller device and get the vpbe_dev object
1709          */
1710         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1711                         vpbe_device_get);
1712         if (err < 0)
1713                 return err;
1714         /* Initialize the vpbe display controller */
1715         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1716                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1717                                                          disp_dev->vpbe_dev);
1718                 if (err) {
1719                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1720                                         "Error initing vpbe\n");
1721                         err = -ENOMEM;
1722                         goto probe_out;
1723                 }
1724         }
1725
1726         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1727                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1728                         err = -ENODEV;
1729                         goto probe_out;
1730                 }
1731         }
1732
1733         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1734         if (!res) {
1735                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1736                          "Unable to get VENC interrupt resource\n");
1737                 err = -ENODEV;
1738                 goto probe_out;
1739         }
1740
1741         irq = res->start;
1742         if (request_irq(irq, venc_isr,  IRQF_DISABLED, VPBE_DISPLAY_DRIVER,
1743                 disp_dev)) {
1744                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1745                                 "Unable to request interrupt\n");
1746                 err = -ENODEV;
1747                 goto probe_out;
1748         }
1749
1750         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1751                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1752                         err = -ENODEV;
1753                         goto probe_out_irq;
1754                 }
1755         }
1756
1757         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1758         return 0;
1759
1760 probe_out_irq:
1761         free_irq(res->start, disp_dev);
1762 probe_out:
1763         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1764                 /* Get the pointer to the layer object */
1765                 vpbe_display_layer = disp_dev->dev[k];
1766                 /* Unregister video device */
1767                 if (vpbe_display_layer) {
1768                         video_unregister_device(
1769                                 &vpbe_display_layer->video_dev);
1770                                 kfree(disp_dev->dev[k]);
1771                 }
1772         }
1773         kfree(disp_dev);
1774         return err;
1775 }
1776
1777 /*
1778  * vpbe_display_remove()
1779  * It un-register hardware layer from V4L2 driver
1780  */
1781 static int vpbe_display_remove(struct platform_device *pdev)
1782 {
1783         struct vpbe_layer *vpbe_display_layer;
1784         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1785         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1786         struct resource *res;
1787         int i;
1788
1789         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1790
1791         /* unregister irq */
1792         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1793         free_irq(res->start, disp_dev);
1794
1795         /* deinitialize the vpbe display controller */
1796         if (NULL != vpbe_dev->ops.deinitialize)
1797                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1798         /* un-register device */
1799         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1800                 /* Get the pointer to the layer object */
1801                 vpbe_display_layer = disp_dev->dev[i];
1802                 /* Unregister video device */
1803                 video_unregister_device(&vpbe_display_layer->video_dev);
1804
1805         }
1806         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1807                 kfree(disp_dev->dev[i]);
1808                 disp_dev->dev[i] = NULL;
1809         }
1810
1811         return 0;
1812 }
1813
1814 static struct platform_driver vpbe_display_driver = {
1815         .driver = {
1816                 .name = VPBE_DISPLAY_DRIVER,
1817                 .owner = THIS_MODULE,
1818                 .bus = &platform_bus_type,
1819         },
1820         .probe = vpbe_display_probe,
1821         .remove = __devexit_p(vpbe_display_remove),
1822 };
1823
1824 module_platform_driver(vpbe_display_driver);
1825
1826 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1827 MODULE_LICENSE("GPL");
1828 MODULE_AUTHOR("Texas Instruments");