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 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.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                              const 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.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_timings - Enumerate the dv timings
1033  *
1034  * enum the timings in the current encoder. Return the status. 0 - success
1035  * -EINVAL on error
1036  */
1037 static int
1038 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1039                         struct v4l2_enum_dv_timings *timings)
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_TIMINGS\n");
1046
1047         /* Enumerate outputs */
1048         if (NULL == vpbe_dev->ops.enum_dv_timings)
1049                 return -EINVAL;
1050
1051         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1052         if (ret) {
1053                 v4l2_err(&vpbe_dev->v4l2_dev,
1054                         "Failed to enumerate dv timings info\n");
1055                 return -EINVAL;
1056         }
1057
1058         return 0;
1059 }
1060
1061 /**
1062  * vpbe_display_s_dv_timings - Set the dv timings
1063  *
1064  * Set the timings in the current encoder. Return the status. 0 - success
1065  * -EINVAL on error
1066  */
1067 static int
1068 vpbe_display_s_dv_timings(struct file *file, void *priv,
1069                                 struct v4l2_dv_timings *timings)
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_TIMINGS\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_timings)
1087                 return -EINVAL;
1088
1089         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1090         if (ret) {
1091                 v4l2_err(&vpbe_dev->v4l2_dev,
1092                         "Failed to set the dv timings 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_timings - Set the dv timings
1105  *
1106  * Get the timings in the current encoder. Return the status. 0 - success
1107  * -EINVAL on error
1108  */
1109 static int
1110 vpbe_display_g_dv_timings(struct file *file, void *priv,
1111                                 struct v4l2_dv_timings *dv_timings)
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_TIMINGS\n");
1117
1118         /* Get the given standard in the encoder */
1119
1120         if (vpbe_dev->current_timings.timings_type &
1121                                 VPBE_ENC_CUSTOM_TIMINGS) {
1122                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1123         } else {
1124                 return -EINVAL;
1125         }
1126
1127         return 0;
1128 }
1129
1130 static int vpbe_display_streamoff(struct file *file, void *priv,
1131                                 enum v4l2_buf_type buf_type)
1132 {
1133         struct vpbe_fh *fh = file->private_data;
1134         struct vpbe_layer *layer = fh->layer;
1135         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1136         struct osd_state *osd_device = fh->disp_dev->osd_device;
1137         int ret;
1138
1139         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1140                         "VIDIOC_STREAMOFF,layer id = %d\n",
1141                         layer->device_id);
1142
1143         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1144                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1145                 return -EINVAL;
1146         }
1147
1148         /* If io is allowed for this file handle, return error */
1149         if (!fh->io_allowed) {
1150                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1151                 return -EACCES;
1152         }
1153
1154         /* If streaming is not started, return error */
1155         if (!layer->started) {
1156                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1157                         " id = %d\n", layer->device_id);
1158                 return -EINVAL;
1159         }
1160
1161         osd_device->ops.disable_layer(osd_device,
1162                         layer->layer_info.id);
1163         layer->started = 0;
1164         ret = videobuf_streamoff(&layer->buffer_queue);
1165
1166         return ret;
1167 }
1168
1169 static int vpbe_display_streamon(struct file *file, void *priv,
1170                          enum v4l2_buf_type buf_type)
1171 {
1172         struct vpbe_fh *fh = file->private_data;
1173         struct vpbe_layer *layer = fh->layer;
1174         struct vpbe_display *disp_dev = fh->disp_dev;
1175         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1176         struct osd_state *osd_device = disp_dev->osd_device;
1177         int ret;
1178
1179         osd_device->ops.disable_layer(osd_device,
1180                         layer->layer_info.id);
1181
1182         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1183                                                 layer->device_id);
1184
1185         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1186                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1187                 return -EINVAL;
1188         }
1189
1190         /* If file handle is not allowed IO, return error */
1191         if (!fh->io_allowed) {
1192                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1193                 return -EACCES;
1194         }
1195         /* If Streaming is already started, return error */
1196         if (layer->started) {
1197                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1198                 return -EBUSY;
1199         }
1200
1201         /*
1202          * Call videobuf_streamon to start streaming
1203          * in videobuf
1204          */
1205         ret = videobuf_streamon(&layer->buffer_queue);
1206         if (ret) {
1207                 v4l2_err(&vpbe_dev->v4l2_dev,
1208                 "error in videobuf_streamon\n");
1209                 return ret;
1210         }
1211         /* If buffer queue is empty, return error */
1212         if (list_empty(&layer->dma_queue)) {
1213                 v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
1214                 goto streamoff;
1215         }
1216         /* Get the next frame from the buffer queue */
1217         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
1218                                 struct videobuf_buffer, queue);
1219         /* Remove buffer from the buffer queue */
1220         list_del(&layer->cur_frm->queue);
1221         /* Mark state of the current frame to active */
1222         layer->cur_frm->state = VIDEOBUF_ACTIVE;
1223         /* Initialize field_id and started member */
1224         layer->field_id = 0;
1225
1226         /* Set parameters in OSD and VENC */
1227         ret = vpbe_set_osd_display_params(disp_dev, layer);
1228         if (ret < 0)
1229                 goto streamoff;
1230
1231         /*
1232          * if request format is yuv420 semiplanar, need to
1233          * enable both video windows
1234          */
1235         layer->started = 1;
1236
1237         layer->layer_first_int = 1;
1238
1239         return ret;
1240 streamoff:
1241         ret = videobuf_streamoff(&layer->buffer_queue);
1242         return ret;
1243 }
1244
1245 static int vpbe_display_dqbuf(struct file *file, void *priv,
1246                       struct v4l2_buffer *buf)
1247 {
1248         struct vpbe_fh *fh = file->private_data;
1249         struct vpbe_layer *layer = fh->layer;
1250         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1251         int ret;
1252
1253         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1254                 "VIDIOC_DQBUF, layer id = %d\n",
1255                 layer->device_id);
1256
1257         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1258                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1259                 return -EINVAL;
1260         }
1261         /* If this file handle is not allowed to do IO, return error */
1262         if (!fh->io_allowed) {
1263                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1264                 return -EACCES;
1265         }
1266         if (file->f_flags & O_NONBLOCK)
1267                 /* Call videobuf_dqbuf for non blocking mode */
1268                 ret = videobuf_dqbuf(&layer->buffer_queue, buf, 1);
1269         else
1270                 /* Call videobuf_dqbuf for blocking mode */
1271                 ret = videobuf_dqbuf(&layer->buffer_queue, buf, 0);
1272
1273         return ret;
1274 }
1275
1276 static int vpbe_display_qbuf(struct file *file, void *priv,
1277                      struct v4l2_buffer *p)
1278 {
1279         struct vpbe_fh *fh = file->private_data;
1280         struct vpbe_layer *layer = fh->layer;
1281         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1282
1283         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1284                 "VIDIOC_QBUF, layer id = %d\n",
1285                 layer->device_id);
1286
1287         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1288                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1289                 return -EINVAL;
1290         }
1291
1292         /* If this file handle is not allowed to do IO, return error */
1293         if (!fh->io_allowed) {
1294                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1295                 return -EACCES;
1296         }
1297
1298         return videobuf_qbuf(&layer->buffer_queue, p);
1299 }
1300
1301 static int vpbe_display_querybuf(struct file *file, void *priv,
1302                          struct v4l2_buffer *buf)
1303 {
1304         struct vpbe_fh *fh = file->private_data;
1305         struct vpbe_layer *layer = fh->layer;
1306         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1307         int ret;
1308
1309         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1310                 "VIDIOC_QUERYBUF, layer id = %d\n",
1311                 layer->device_id);
1312
1313         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1314                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1315                 return -EINVAL;
1316         }
1317
1318         /* Call videobuf_querybuf to get information */
1319         ret = videobuf_querybuf(&layer->buffer_queue, buf);
1320
1321         return ret;
1322 }
1323
1324 static int vpbe_display_reqbufs(struct file *file, void *priv,
1325                         struct v4l2_requestbuffers *req_buf)
1326 {
1327         struct vpbe_fh *fh = file->private_data;
1328         struct vpbe_layer *layer = fh->layer;
1329         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1330         int ret;
1331
1332         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1333
1334         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1335                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1336                 return -EINVAL;
1337         }
1338
1339         /* If io users of the layer is not zero, return error */
1340         if (0 != layer->io_usrs) {
1341                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1342                 return -EBUSY;
1343         }
1344         /* Initialize videobuf queue as per the buffer type */
1345         videobuf_queue_dma_contig_init(&layer->buffer_queue,
1346                                 &video_qops,
1347                                 vpbe_dev->pdev,
1348                                 &layer->irqlock,
1349                                 V4L2_BUF_TYPE_VIDEO_OUTPUT,
1350                                 layer->pix_fmt.field,
1351                                 sizeof(struct videobuf_buffer),
1352                                 fh, NULL);
1353
1354         /* Set io allowed member of file handle to TRUE */
1355         fh->io_allowed = 1;
1356         /* Increment io usrs member of layer object to 1 */
1357         layer->io_usrs = 1;
1358         /* Store type of memory requested in layer object */
1359         layer->memory = req_buf->memory;
1360         /* Initialize buffer queue */
1361         INIT_LIST_HEAD(&layer->dma_queue);
1362         /* Allocate buffers */
1363         ret = videobuf_reqbufs(&layer->buffer_queue, req_buf);
1364
1365         return ret;
1366 }
1367
1368 /*
1369  * vpbe_display_mmap()
1370  * It is used to map kernel space buffers into user spaces
1371  */
1372 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1373 {
1374         /* Get the layer object and file handle object */
1375         struct vpbe_fh *fh = filep->private_data;
1376         struct vpbe_layer *layer = fh->layer;
1377         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1378         int ret;
1379
1380         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1381
1382         if (mutex_lock_interruptible(&layer->opslock))
1383                 return -ERESTARTSYS;
1384         ret = videobuf_mmap_mapper(&layer->buffer_queue, vma);
1385         mutex_unlock(&layer->opslock);
1386         return ret;
1387 }
1388
1389 /* vpbe_display_poll(): It is used for select/poll system call
1390  */
1391 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1392 {
1393         struct vpbe_fh *fh = filep->private_data;
1394         struct vpbe_layer *layer = fh->layer;
1395         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1396         unsigned int err = 0;
1397
1398         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1399         if (layer->started) {
1400                 mutex_lock(&layer->opslock);
1401                 err = videobuf_poll_stream(filep, &layer->buffer_queue, wait);
1402                 mutex_unlock(&layer->opslock);
1403         }
1404         return err;
1405 }
1406
1407 /*
1408  * vpbe_display_open()
1409  * It creates object of file handle structure and stores it in private_data
1410  * member of filepointer
1411  */
1412 static int vpbe_display_open(struct file *file)
1413 {
1414         struct vpbe_fh *fh = NULL;
1415         struct vpbe_layer *layer = video_drvdata(file);
1416         struct vpbe_display *disp_dev = layer->disp_dev;
1417         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1418         struct osd_state *osd_device = disp_dev->osd_device;
1419         int err;
1420
1421         /* Allocate memory for the file handle object */
1422         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1423         if (fh == NULL) {
1424                 v4l2_err(&vpbe_dev->v4l2_dev,
1425                         "unable to allocate memory for file handle object\n");
1426                 return -ENOMEM;
1427         }
1428         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1429                         "vpbe display open plane = %d\n",
1430                         layer->device_id);
1431
1432         /* store pointer to fh in private_data member of filep */
1433         file->private_data = fh;
1434         fh->layer = layer;
1435         fh->disp_dev = disp_dev;
1436
1437         if (!layer->usrs) {
1438                 if (mutex_lock_interruptible(&layer->opslock))
1439                         return -ERESTARTSYS;
1440                 /* First claim the layer for this device */
1441                 err = osd_device->ops.request_layer(osd_device,
1442                                                 layer->layer_info.id);
1443                 mutex_unlock(&layer->opslock);
1444                 if (err < 0) {
1445                         /* Couldn't get layer */
1446                         v4l2_err(&vpbe_dev->v4l2_dev,
1447                                 "Display Manager failed to allocate layer\n");
1448                         kfree(fh);
1449                         return -EINVAL;
1450                 }
1451         }
1452         /* Increment layer usrs counter */
1453         layer->usrs++;
1454         /* Set io_allowed member to false */
1455         fh->io_allowed = 0;
1456         /* Initialize priority of this instance to default priority */
1457         fh->prio = V4L2_PRIORITY_UNSET;
1458         v4l2_prio_open(&layer->prio, &fh->prio);
1459         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1460                         "vpbe display device opened successfully\n");
1461         return 0;
1462 }
1463
1464 /*
1465  * vpbe_display_release()
1466  * This function deletes buffer queue, frees the buffers and the davinci
1467  * display file * handle
1468  */
1469 static int vpbe_display_release(struct file *file)
1470 {
1471         /* Get the layer object and file handle object */
1472         struct vpbe_fh *fh = file->private_data;
1473         struct vpbe_layer *layer = fh->layer;
1474         struct osd_layer_config *cfg  = &layer->layer_info.config;
1475         struct vpbe_display *disp_dev = fh->disp_dev;
1476         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1477         struct osd_state *osd_device = disp_dev->osd_device;
1478
1479         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1480
1481         mutex_lock(&layer->opslock);
1482         /* if this instance is doing IO */
1483         if (fh->io_allowed) {
1484                 /* Reset io_usrs member of layer object */
1485                 layer->io_usrs = 0;
1486
1487                 osd_device->ops.disable_layer(osd_device,
1488                                 layer->layer_info.id);
1489                 layer->started = 0;
1490                 /* Free buffers allocated */
1491                 videobuf_queue_cancel(&layer->buffer_queue);
1492                 videobuf_mmap_free(&layer->buffer_queue);
1493         }
1494
1495         /* Decrement layer usrs counter */
1496         layer->usrs--;
1497         /* If this file handle has initialize encoder device, reset it */
1498         if (!layer->usrs) {
1499                 if (cfg->pixfmt == PIXFMT_NV12) {
1500                         struct vpbe_layer *otherlayer;
1501                         otherlayer =
1502                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1503                         osd_device->ops.disable_layer(osd_device,
1504                                         otherlayer->layer_info.id);
1505                         osd_device->ops.release_layer(osd_device,
1506                                         otherlayer->layer_info.id);
1507                 }
1508                 osd_device->ops.disable_layer(osd_device,
1509                                 layer->layer_info.id);
1510                 osd_device->ops.release_layer(osd_device,
1511                                 layer->layer_info.id);
1512         }
1513         /* Close the priority */
1514         v4l2_prio_close(&layer->prio, fh->prio);
1515         file->private_data = NULL;
1516         mutex_unlock(&layer->opslock);
1517
1518         /* Free memory allocated to file handle object */
1519         kfree(fh);
1520
1521         disp_dev->cbcr_ofst = 0;
1522
1523         return 0;
1524 }
1525
1526 #ifdef CONFIG_VIDEO_ADV_DEBUG
1527 static int vpbe_display_g_register(struct file *file, void *priv,
1528                         struct v4l2_dbg_register *reg)
1529 {
1530         struct v4l2_dbg_match *match = &reg->match;
1531         struct vpbe_fh *fh = file->private_data;
1532         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1533
1534         if (match->type >= 2) {
1535                 v4l2_subdev_call(vpbe_dev->venc,
1536                                  core,
1537                                  g_register,
1538                                  reg);
1539         }
1540
1541         return 0;
1542 }
1543
1544 static int vpbe_display_s_register(struct file *file, void *priv,
1545                         struct v4l2_dbg_register *reg)
1546 {
1547         return 0;
1548 }
1549 #endif
1550
1551 /* vpbe capture ioctl operations */
1552 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1553         .vidioc_querycap         = vpbe_display_querycap,
1554         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1555         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1556         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1557         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1558         .vidioc_reqbufs          = vpbe_display_reqbufs,
1559         .vidioc_querybuf         = vpbe_display_querybuf,
1560         .vidioc_qbuf             = vpbe_display_qbuf,
1561         .vidioc_dqbuf            = vpbe_display_dqbuf,
1562         .vidioc_streamon         = vpbe_display_streamon,
1563         .vidioc_streamoff        = vpbe_display_streamoff,
1564         .vidioc_cropcap          = vpbe_display_cropcap,
1565         .vidioc_g_crop           = vpbe_display_g_crop,
1566         .vidioc_s_crop           = vpbe_display_s_crop,
1567         .vidioc_g_priority       = vpbe_display_g_priority,
1568         .vidioc_s_priority       = vpbe_display_s_priority,
1569         .vidioc_s_std            = vpbe_display_s_std,
1570         .vidioc_g_std            = vpbe_display_g_std,
1571         .vidioc_enum_output      = vpbe_display_enum_output,
1572         .vidioc_s_output         = vpbe_display_s_output,
1573         .vidioc_g_output         = vpbe_display_g_output,
1574         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1575         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1576         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1577 #ifdef CONFIG_VIDEO_ADV_DEBUG
1578         .vidioc_g_register       = vpbe_display_g_register,
1579         .vidioc_s_register       = vpbe_display_s_register,
1580 #endif
1581 };
1582
1583 static struct v4l2_file_operations vpbe_fops = {
1584         .owner = THIS_MODULE,
1585         .open = vpbe_display_open,
1586         .release = vpbe_display_release,
1587         .unlocked_ioctl = video_ioctl2,
1588         .mmap = vpbe_display_mmap,
1589         .poll = vpbe_display_poll
1590 };
1591
1592 static int vpbe_device_get(struct device *dev, void *data)
1593 {
1594         struct platform_device *pdev = to_platform_device(dev);
1595         struct vpbe_display *vpbe_disp  = data;
1596
1597         if (strcmp("vpbe_controller", pdev->name) == 0)
1598                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1599
1600         if (strcmp("vpbe-osd", pdev->name) == 0)
1601                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1602
1603         return 0;
1604 }
1605
1606 static __devinit int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1607                                      struct platform_device *pdev)
1608 {
1609         struct vpbe_layer *vpbe_display_layer = NULL;
1610         struct video_device *vbd = NULL;
1611
1612         /* Allocate memory for four plane display objects */
1613
1614         disp_dev->dev[i] =
1615                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1616
1617         /* If memory allocation fails, return error */
1618         if (!disp_dev->dev[i]) {
1619                 printk(KERN_ERR "ran out of memory\n");
1620                 return  -ENOMEM;
1621         }
1622         spin_lock_init(&disp_dev->dev[i]->irqlock);
1623         mutex_init(&disp_dev->dev[i]->opslock);
1624
1625         /* Get the pointer to the layer object */
1626         vpbe_display_layer = disp_dev->dev[i];
1627         vbd = &vpbe_display_layer->video_dev;
1628         /* Initialize field of video device */
1629         vbd->release    = video_device_release_empty;
1630         vbd->fops       = &vpbe_fops;
1631         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1632         vbd->minor      = -1;
1633         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1634         vbd->lock       = &vpbe_display_layer->opslock;
1635         vbd->vfl_dir    = VFL_DIR_TX;
1636
1637         if (disp_dev->vpbe_dev->current_timings.timings_type &
1638                         VPBE_ENC_STD) {
1639                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1640                 vbd->current_norm =
1641                         disp_dev->vpbe_dev->current_timings.std_id;
1642         } else
1643                 vbd->current_norm = 0;
1644
1645         snprintf(vbd->name, sizeof(vbd->name),
1646                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1647                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1648                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1649                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1650
1651         vpbe_display_layer->device_id = i;
1652
1653         vpbe_display_layer->layer_info.id =
1654                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1655
1656         /* Initialize prio member of layer object */
1657         v4l2_prio_init(&vpbe_display_layer->prio);
1658
1659         return 0;
1660 }
1661
1662 static __devinit int register_device(struct vpbe_layer *vpbe_display_layer,
1663                                         struct vpbe_display *disp_dev,
1664                                         struct platform_device *pdev) {
1665         int err;
1666
1667         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1668                   "Trying to register VPBE display device.\n");
1669         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1670                   "layer=%x,layer->video_dev=%x\n",
1671                   (int)vpbe_display_layer,
1672                   (int)&vpbe_display_layer->video_dev);
1673
1674         err = video_register_device(&vpbe_display_layer->video_dev,
1675                                     VFL_TYPE_GRABBER,
1676                                     -1);
1677         if (err)
1678                 return -ENODEV;
1679
1680         vpbe_display_layer->disp_dev = disp_dev;
1681         /* set the driver data in platform device */
1682         platform_set_drvdata(pdev, disp_dev);
1683         video_set_drvdata(&vpbe_display_layer->video_dev,
1684                           vpbe_display_layer);
1685
1686         return 0;
1687 }
1688
1689
1690
1691 /*
1692  * vpbe_display_probe()
1693  * This function creates device entries by register itself to the V4L2 driver
1694  * and initializes fields of each layer objects
1695  */
1696 static __devinit int vpbe_display_probe(struct platform_device *pdev)
1697 {
1698         struct vpbe_layer *vpbe_display_layer;
1699         struct vpbe_display *disp_dev;
1700         struct resource *res = NULL;
1701         int k;
1702         int i;
1703         int err;
1704         int irq;
1705
1706         printk(KERN_DEBUG "vpbe_display_probe\n");
1707         /* Allocate memory for vpbe_display */
1708         disp_dev = kzalloc(sizeof(struct vpbe_display), GFP_KERNEL);
1709         if (!disp_dev) {
1710                 printk(KERN_ERR "ran out of memory\n");
1711                 return -ENOMEM;
1712         }
1713
1714         spin_lock_init(&disp_dev->dma_queue_lock);
1715         /*
1716          * Scan all the platform devices to find the vpbe
1717          * controller device and get the vpbe_dev object
1718          */
1719         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1720                         vpbe_device_get);
1721         if (err < 0)
1722                 return err;
1723         /* Initialize the vpbe display controller */
1724         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1725                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1726                                                          disp_dev->vpbe_dev);
1727                 if (err) {
1728                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1729                                         "Error initing vpbe\n");
1730                         err = -ENOMEM;
1731                         goto probe_out;
1732                 }
1733         }
1734
1735         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1736                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1737                         err = -ENODEV;
1738                         goto probe_out;
1739                 }
1740         }
1741
1742         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1743         if (!res) {
1744                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1745                          "Unable to get VENC interrupt resource\n");
1746                 err = -ENODEV;
1747                 goto probe_out;
1748         }
1749
1750         irq = res->start;
1751         if (request_irq(irq, venc_isr,  IRQF_DISABLED, VPBE_DISPLAY_DRIVER,
1752                 disp_dev)) {
1753                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1754                                 "Unable to request interrupt\n");
1755                 err = -ENODEV;
1756                 goto probe_out;
1757         }
1758
1759         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1760                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1761                         err = -ENODEV;
1762                         goto probe_out_irq;
1763                 }
1764         }
1765
1766         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1767         return 0;
1768
1769 probe_out_irq:
1770         free_irq(res->start, disp_dev);
1771 probe_out:
1772         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1773                 /* Get the pointer to the layer object */
1774                 vpbe_display_layer = disp_dev->dev[k];
1775                 /* Unregister video device */
1776                 if (vpbe_display_layer) {
1777                         video_unregister_device(
1778                                 &vpbe_display_layer->video_dev);
1779                                 kfree(disp_dev->dev[k]);
1780                 }
1781         }
1782         kfree(disp_dev);
1783         return err;
1784 }
1785
1786 /*
1787  * vpbe_display_remove()
1788  * It un-register hardware layer from V4L2 driver
1789  */
1790 static int vpbe_display_remove(struct platform_device *pdev)
1791 {
1792         struct vpbe_layer *vpbe_display_layer;
1793         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1794         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1795         struct resource *res;
1796         int i;
1797
1798         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1799
1800         /* unregister irq */
1801         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1802         free_irq(res->start, disp_dev);
1803
1804         /* deinitialize the vpbe display controller */
1805         if (NULL != vpbe_dev->ops.deinitialize)
1806                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1807         /* un-register device */
1808         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1809                 /* Get the pointer to the layer object */
1810                 vpbe_display_layer = disp_dev->dev[i];
1811                 /* Unregister video device */
1812                 video_unregister_device(&vpbe_display_layer->video_dev);
1813
1814         }
1815         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1816                 kfree(disp_dev->dev[i]);
1817                 disp_dev->dev[i] = NULL;
1818         }
1819
1820         return 0;
1821 }
1822
1823 static struct platform_driver vpbe_display_driver = {
1824         .driver = {
1825                 .name = VPBE_DISPLAY_DRIVER,
1826                 .owner = THIS_MODULE,
1827                 .bus = &platform_bus_type,
1828         },
1829         .probe = vpbe_display_probe,
1830         .remove = __devexit_p(vpbe_display_remove),
1831 };
1832
1833 module_platform_driver(vpbe_display_driver);
1834
1835 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1836 MODULE_LICENSE("GPL");
1837 MODULE_AUTHOR("Texas Instruments");