drivers/media/platform/davinci/vpbe_display.c

   1 /*
   2  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/errno.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/string.h>
  19 #include <linux/wait.h>
  20 #include <linux/time.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/irq.h>
  23 #include <linux/mm.h>
  24 #include <linux/mutex.h>
  25 #include <linux/videodev2.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/pgtable.h>
  29 #include <mach/cputype.h>
  30
  31 #include <media/v4l2-dev.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-ioctl.h>
  34 #include <media/v4l2-device.h>
  35 #include <media/davinci/vpbe_display.h>
  36 #include <media/davinci/vpbe_types.h>
  37 #include <media/davinci/vpbe.h>
  38 #include <media/davinci/vpbe_venc.h>
  39 #include <media/davinci/vpbe_osd.h>
  40 #include "vpbe_venc_regs.h"
  41
  42 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
  43
  44 static int debug;
  45
  46 #define VPBE_DEFAULT_NUM_BUFS 3
  47
  48 module_param(debug, int, 0644);
  49
  50 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
  51                         struct vpbe_layer *layer);
  52
  53 static int venc_is_second_field(struct vpbe_display *disp_dev)
  54 {
  55         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
  56         int ret;
  57         int val;
  58
  59         ret = v4l2_subdev_call(vpbe_dev->venc,
  60                                core,
  61                                ioctl,
  62                                VENC_GET_FLD,
  63                                &val);
  64         if (ret < 0) {
  65                 v4l2_err(&vpbe_dev->v4l2_dev,
  66                          "Error in getting Field ID 0\n");
  67         }
  68         return val;
  69 }
  70
  71 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
  72                                 struct vpbe_layer *layer)
  73 {
  74         struct timespec timevalue;
  75
  76         if (layer->cur_frm == layer->next_frm)
  77                 return;
  78         ktime_get_ts(&timevalue);
  79         layer->cur_frm->vb.v4l2_buf.timestamp.tv_sec =
  80                 timevalue.tv_sec;
  81         layer->cur_frm->vb.v4l2_buf.timestamp.tv_usec =
  82                 timevalue.tv_nsec / NSEC_PER_USEC;
  83         vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_DONE);
  84         /* Make cur_frm pointing to next_frm */
  85         layer->cur_frm = layer->next_frm;
  86 }
  87
  88 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
  89                                 struct vpbe_layer *layer)
  90 {
  91         struct osd_state *osd_device = disp_obj->osd_device;
  92         unsigned long addr;
  93
  94         spin_lock(&disp_obj->dma_queue_lock);
  95         if (list_empty(&layer->dma_queue) ||
  96                 (layer->cur_frm != layer->next_frm)) {
  97                 spin_unlock(&disp_obj->dma_queue_lock);
  98                 return;
  99         }
 100         /*
 101          * one field is displayed configure
 102          * the next frame if it is available
 103          * otherwise hold on current frame
 104          * Get next from the buffer queue
 105          */
 106         layer->next_frm = list_entry(layer->dma_queue.next,
 107                           struct  vpbe_disp_buffer, list);
 108         /* Remove that from the buffer queue */
 109         list_del(&layer->next_frm->list);
 110         spin_unlock(&disp_obj->dma_queue_lock);
 111         /* Mark state of the frame to active */
 112         layer->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 113         addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb, 0);
 114         osd_device->ops.start_layer(osd_device,
 115                         layer->layer_info.id,
 116                         addr,
 117                         disp_obj->cbcr_ofst);
 118 }
 119
 120 /* interrupt service routine */
 121 static irqreturn_t venc_isr(int irq, void *arg)
 122 {
 123         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
 124         struct vpbe_layer *layer;
 125         static unsigned last_event;
 126         unsigned event = 0;
 127         int fid;
 128         int i;
 129
 130         if ((NULL == arg) || (NULL == disp_dev->dev[0]))
 131                 return IRQ_HANDLED;
 132
 133         if (venc_is_second_field(disp_dev))
 134                 event |= VENC_SECOND_FIELD;
 135         else
 136                 event |= VENC_FIRST_FIELD;
 137
 138         if (event == (last_event & ~VENC_END_OF_FRAME)) {
 139                 /*
 140                 * If the display is non-interlaced, then we need to flag the
 141                 * end-of-frame event at every interrupt regardless of the
 142                 * value of the FIDST bit.  We can conclude that the display is
 143                 * non-interlaced if the value of the FIDST bit is unchanged
 144                 * from the previous interrupt.
 145                 */
 146                 event |= VENC_END_OF_FRAME;
 147         } else if (event == VENC_SECOND_FIELD) {
 148                 /* end-of-frame for interlaced display */
 149                 event |= VENC_END_OF_FRAME;
 150         }
 151         last_event = event;
 152
 153         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
 154                 layer = disp_dev->dev[i];
 155                 /* If streaming is started in this layer */
 156                 if (!layer->started)
 157                         continue;
 158
 159                 if (layer->layer_first_int) {
 160                         layer->layer_first_int = 0;
 161                         continue;
 162                 }
 163                 /* Check the field format */
 164                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
 165                         (event & VENC_END_OF_FRAME)) {
 166                         /* Progressive mode */
 167
 168                         vpbe_isr_even_field(disp_dev, layer);
 169                         vpbe_isr_odd_field(disp_dev, layer);
 170                 } else {
 171                 /* Interlaced mode */
 172
 173                         layer->field_id ^= 1;
 174                         if (event & VENC_FIRST_FIELD)
 175                                 fid = 0;
 176                         else
 177                                 fid = 1;
 178
 179                         /*
 180                         * If field id does not match with store
 181                         * field id
 182                         */
 183                         if (fid != layer->field_id) {
 184                                 /* Make them in sync */
 185                                 layer->field_id = fid;
 186                                 continue;
 187                         }
 188                         /*
 189                         * device field id and local field id are
 190                         * in sync. If this is even field
 191                         */
 192                         if (0 == fid)
 193                                 vpbe_isr_even_field(disp_dev, layer);
 194                         else  /* odd field */
 195                                 vpbe_isr_odd_field(disp_dev, layer);
 196                 }
 197         }
 198
 199         return IRQ_HANDLED;
 200 }
 201
 202 /*
 203  * vpbe_buffer_prepare()
 204  * This is the callback function called from vb2_qbuf() function
 205  * the buffer is prepared and user space virtual address is converted into
 206  * physical address
 207  */
 208 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
 209 {
 210         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 211         struct vb2_queue *q = vb->vb2_queue;
 212         struct vpbe_layer *layer = fh->layer;
 213         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 214         unsigned long addr;
 215
 216         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 217                                 "vpbe_buffer_prepare\n");
 218
 219         if (vb->state != VB2_BUF_STATE_ACTIVE &&
 220                 vb->state != VB2_BUF_STATE_PREPARED) {
 221                 vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
 222                 if (vb2_plane_vaddr(vb, 0) &&
 223                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 224                         return -EINVAL;
 225
 226                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 227                 if (q->streaming) {
 228                         if (!IS_ALIGNED(addr, 8)) {
 229                                 v4l2_err(&vpbe_dev->v4l2_dev,
 230                                         "buffer_prepare:offset is \
 231                                         not aligned to 32 bytes\n");
 232                                 return -EINVAL;
 233                         }
 234                 }
 235         }
 236         return 0;
 237 }
 238
 239 /*
 240  * vpbe_buffer_setup()
 241  * This function allocates memory for the buffers
 242  */
 243 static int
 244 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 245                         unsigned int *nbuffers, unsigned int *nplanes,
 246                         unsigned int sizes[], void *alloc_ctxs[])
 247
 248 {
 249         /* Get the file handle object and layer object */
 250         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 251         struct vpbe_layer *layer = fh->layer;
 252         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 253
 254         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 255
 256         /* Store number of buffers allocated in numbuffer member */
 257         if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
 258                 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
 259
 260         *nplanes = 1;
 261         sizes[0] = layer->pix_fmt.sizeimage;
 262         alloc_ctxs[0] = layer->alloc_ctx;
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * vpbe_buffer_queue()
 269  * This function adds the buffer to DMA queue
 270  */
 271 static void vpbe_buffer_queue(struct vb2_buffer *vb)
 272 {
 273         /* Get the file handle object and layer object */
 274         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 275         struct vpbe_disp_buffer *buf = container_of(vb,
 276                                 struct vpbe_disp_buffer, vb);
 277         struct vpbe_layer *layer = fh->layer;
 278         struct vpbe_display *disp = fh->disp_dev;
 279         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 280         unsigned long flags;
 281
 282         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 283                         "vpbe_buffer_queue\n");
 284
 285         /* add the buffer to the DMA queue */
 286         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 287         list_add_tail(&buf->list, &layer->dma_queue);
 288         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 289 }
 290
 291 /*
 292  * vpbe_buf_cleanup()
 293  * This function is called from the vb2 layer to free memory allocated to
 294  * the buffers
 295  */
 296 static void vpbe_buf_cleanup(struct vb2_buffer *vb)
 297 {
 298         /* Get the file handle object and layer object */
 299         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 300         struct vpbe_layer *layer = fh->layer;
 301         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 302         struct vpbe_disp_buffer *buf = container_of(vb,
 303                                         struct vpbe_disp_buffer, vb);
 304         unsigned long flags;
 305
 306         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 307                         "vpbe_buf_cleanup\n");
 308
 309         spin_lock_irqsave(&layer->irqlock, flags);
 310         if (vb->state == VB2_BUF_STATE_ACTIVE)
 311                 list_del_init(&buf->list);
 312         spin_unlock_irqrestore(&layer->irqlock, flags);
 313 }
 314
 315 static void vpbe_wait_prepare(struct vb2_queue *vq)
 316 {
 317         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 318         struct vpbe_layer *layer = fh->layer;
 319
 320         mutex_unlock(&layer->opslock);
 321 }
 322
 323 static void vpbe_wait_finish(struct vb2_queue *vq)
 324 {
 325         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 326         struct vpbe_layer *layer = fh->layer;
 327
 328         mutex_lock(&layer->opslock);
 329 }
 330
 331 static int vpbe_buffer_init(struct vb2_buffer *vb)
 332 {
 333         struct vpbe_disp_buffer *buf = container_of(vb,
 334                                         struct vpbe_disp_buffer, vb);
 335
 336         INIT_LIST_HEAD(&buf->list);
 337         return 0;
 338 }
 339
 340 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
 341 {
 342         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 343         struct vpbe_layer *layer = fh->layer;
 344         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 345         int ret;
 346
 347         /* If buffer queue is empty, return error */
 348         if (list_empty(&layer->dma_queue)) {
 349                 v4l2_err(&vpbe_dev->v4l2_dev, "buffer queue is empty\n");
 350                 return -EINVAL;
 351         }
 352         /* Get the next frame from the buffer queue */
 353         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 354                                 struct vpbe_disp_buffer, list);
 355         /* Remove buffer from the buffer queue */
 356         list_del(&layer->cur_frm->list);
 357         /* Mark state of the current frame to active */
 358         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 359         /* Initialize field_id and started member */
 360         layer->field_id = 0;
 361
 362         /* Set parameters in OSD and VENC */
 363         ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
 364         if (ret < 0)
 365                 return ret;
 366
 367         /*
 368          * if request format is yuv420 semiplanar, need to
 369          * enable both video windows
 370          */
 371         layer->started = 1;
 372         layer->layer_first_int = 1;
 373
 374         return ret;
 375 }
 376
 377 static int vpbe_stop_streaming(struct vb2_queue *vq)
 378 {
 379         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 380         struct vpbe_layer *layer = fh->layer;
 381
 382         if (!vb2_is_streaming(vq))
 383                 return 0;
 384
 385         /* release all active buffers */
 386         while (!list_empty(&layer->dma_queue)) {
 387                 layer->next_frm = list_entry(layer->dma_queue.next,
 388                                                 struct vpbe_disp_buffer, list);
 389                 list_del(&layer->next_frm->list);
 390                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
 391         }
 392
 393         return 0;
 394 }
 395
 396 static struct vb2_ops video_qops = {
 397         .queue_setup = vpbe_buffer_queue_setup,
 398         .wait_prepare = vpbe_wait_prepare,
 399         .wait_finish = vpbe_wait_finish,
 400         .buf_init = vpbe_buffer_init,
 401         .buf_prepare = vpbe_buffer_prepare,
 402         .start_streaming = vpbe_start_streaming,
 403         .stop_streaming = vpbe_stop_streaming,
 404         .buf_cleanup = vpbe_buf_cleanup,
 405         .buf_queue = vpbe_buffer_queue,
 406 };
 407
 408 static
 409 struct vpbe_layer*
 410 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 411                         struct vpbe_layer *layer)
 412 {
 413         enum vpbe_display_device_id thiswin, otherwin;
 414         thiswin = layer->device_id;
 415
 416         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 417         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 418         return disp_dev->dev[otherwin];
 419 }
 420
 421 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 422                         struct vpbe_layer *layer)
 423 {
 424         struct osd_layer_config *cfg  = &layer->layer_info.config;
 425         struct osd_state *osd_device = disp_dev->osd_device;
 426         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 427         unsigned long addr;
 428         int ret;
 429
 430         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
 431         /* Set address in the display registers */
 432         osd_device->ops.start_layer(osd_device,
 433                                     layer->layer_info.id,
 434                                     addr,
 435                                     disp_dev->cbcr_ofst);
 436
 437         ret = osd_device->ops.enable_layer(osd_device,
 438                                 layer->layer_info.id, 0);
 439         if (ret < 0) {
 440                 v4l2_err(&vpbe_dev->v4l2_dev,
 441                         "Error in enabling osd window layer 0\n");
 442                 return -1;
 443         }
 444
 445         /* Enable the window */
 446         layer->layer_info.enable = 1;
 447         if (cfg->pixfmt == PIXFMT_NV12) {
 448                 struct vpbe_layer *otherlayer =
 449                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 450
 451                 ret = osd_device->ops.enable_layer(osd_device,
 452                                 otherlayer->layer_info.id, 1);
 453                 if (ret < 0) {
 454                         v4l2_err(&vpbe_dev->v4l2_dev,
 455                                 "Error in enabling osd window layer 1\n");
 456                         return -1;
 457                 }
 458                 otherlayer->layer_info.enable = 1;
 459         }
 460         return 0;
 461 }
 462
 463 static void
 464 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 465                         struct vpbe_layer *layer,
 466                         int expected_xsize, int expected_ysize)
 467 {
 468         struct display_layer_info *layer_info = &layer->layer_info;
 469         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 470         struct osd_layer_config *cfg  = &layer->layer_info.config;
 471         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 472         int calculated_xsize;
 473         int h_exp = 0;
 474         int v_exp = 0;
 475         int h_scale;
 476         int v_scale;
 477
 478         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 479
 480         /*
 481          * Application initially set the image format. Current display
 482          * size is obtained from the vpbe display controller. expected_xsize
 483          * and expected_ysize are set through S_CROP ioctl. Based on this,
 484          * driver will calculate the scale factors for vertical and
 485          * horizontal direction so that the image is displayed scaled
 486          * and expanded. Application uses expansion to display the image
 487          * in a square pixel. Otherwise it is displayed using displays
 488          * pixel aspect ratio.It is expected that application chooses
 489          * the crop coordinates for cropped or scaled display. if crop
 490          * size is less than the image size, it is displayed cropped or
 491          * it is displayed scaled and/or expanded.
 492          *
 493          * to begin with, set the crop window same as expected. Later we
 494          * will override with scaled window size
 495          */
 496
 497         cfg->xsize = pixfmt->width;
 498         cfg->ysize = pixfmt->height;
 499         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 500         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 501         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 502         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 503
 504         if (pixfmt->width < expected_xsize) {
 505                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 506                 if (h_scale < 2)
 507                         h_scale = 1;
 508                 else if (h_scale >= 4)
 509                         h_scale = 4;
 510                 else
 511                         h_scale = 2;
 512                 cfg->xsize *= h_scale;
 513                 if (cfg->xsize < expected_xsize) {
 514                         if ((standard_id & V4L2_STD_525_60) ||
 515                         (standard_id & V4L2_STD_625_50)) {
 516                                 calculated_xsize = (cfg->xsize *
 517                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 518                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 519                                 if (calculated_xsize <= expected_xsize) {
 520                                         h_exp = 1;
 521                                         cfg->xsize = calculated_xsize;
 522                                 }
 523                         }
 524                 }
 525                 if (h_scale == 2)
 526                         layer_info->h_zoom = ZOOM_X2;
 527                 else if (h_scale == 4)
 528                         layer_info->h_zoom = ZOOM_X4;
 529                 if (h_exp)
 530                         layer_info->h_exp = H_EXP_9_OVER_8;
 531         } else {
 532                 /* no scaling, only cropping. Set display area to crop area */
 533                 cfg->xsize = expected_xsize;
 534         }
 535
 536         if (pixfmt->height < expected_ysize) {
 537                 v_scale = expected_ysize / pixfmt->height;
 538                 if (v_scale < 2)
 539                         v_scale = 1;
 540                 else if (v_scale >= 4)
 541                         v_scale = 4;
 542                 else
 543                         v_scale = 2;
 544                 cfg->ysize *= v_scale;
 545                 if (cfg->ysize < expected_ysize) {
 546                         if ((standard_id & V4L2_STD_625_50)) {
 547                                 calculated_xsize = (cfg->ysize *
 548                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 549                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 550                                 if (calculated_xsize <= expected_ysize) {
 551                                         v_exp = 1;
 552                                         cfg->ysize = calculated_xsize;
 553                                 }
 554                         }
 555                 }
 556                 if (v_scale == 2)
 557                         layer_info->v_zoom = ZOOM_X2;
 558                 else if (v_scale == 4)
 559                         layer_info->v_zoom = ZOOM_X4;
 560                 if (v_exp)
 561                         layer_info->h_exp = V_EXP_6_OVER_5;
 562         } else {
 563                 /* no scaling, only cropping. Set display area to crop area */
 564                 cfg->ysize = expected_ysize;
 565         }
 566         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 567                 "crop display xsize = %d, ysize = %d\n",
 568                 cfg->xsize, cfg->ysize);
 569 }
 570
 571 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 572                         struct vpbe_layer *layer,
 573                         int top, int left)
 574 {
 575         struct osd_layer_config *cfg = &layer->layer_info.config;
 576         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 577
 578         cfg->xpos = min((unsigned int)left,
 579                         vpbe_dev->current_timings.xres - cfg->xsize);
 580         cfg->ypos = min((unsigned int)top,
 581                         vpbe_dev->current_timings.yres - cfg->ysize);
 582
 583         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 584                 "new xpos = %d, ypos = %d\n",
 585                 cfg->xpos, cfg->ypos);
 586 }
 587
 588 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 589                         struct v4l2_rect *c)
 590 {
 591         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 592
 593         if ((c->width == 0) ||
 594           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 595                 c->width = vpbe_dev->current_timings.xres - c->left;
 596
 597         if ((c->height == 0) || ((c->height + c->top) >
 598           vpbe_dev->current_timings.yres))
 599                 c->height = vpbe_dev->current_timings.yres - c->top;
 600
 601         /* window height must be even for interlaced display */
 602         if (vpbe_dev->current_timings.interlaced)
 603                 c->height &= (~0x01);
 604
 605 }
 606
 607 /**
 608  * vpbe_try_format()
 609  * If user application provides width and height, and have bytesperline set
 610  * to zero, driver calculates bytesperline and sizeimage based on hardware
 611  * limits.
 612  */
 613 static int vpbe_try_format(struct vpbe_display *disp_dev,
 614                         struct v4l2_pix_format *pixfmt, int check)
 615 {
 616         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 617         int min_height = 1;
 618         int min_width = 32;
 619         int max_height;
 620         int max_width;
 621         int bpp;
 622
 623         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 624             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 625                 /* choose default as V4L2_PIX_FMT_UYVY */
 626                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 627
 628         /* Check the field format */
 629         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 630                 (pixfmt->field != V4L2_FIELD_NONE)) {
 631                 if (vpbe_dev->current_timings.interlaced)
 632                         pixfmt->field = V4L2_FIELD_INTERLACED;
 633                 else
 634                         pixfmt->field = V4L2_FIELD_NONE;
 635         }
 636
 637         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 638                 min_height = 2;
 639
 640         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 641                 bpp = 1;
 642         else
 643                 bpp = 2;
 644
 645         max_width = vpbe_dev->current_timings.xres;
 646         max_height = vpbe_dev->current_timings.yres;
 647
 648         min_width /= bpp;
 649
 650         if (!pixfmt->width || (pixfmt->width < min_width) ||
 651                 (pixfmt->width > max_width)) {
 652                 pixfmt->width = vpbe_dev->current_timings.xres;
 653         }
 654
 655         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 656                 (pixfmt->height  > max_height)) {
 657                 pixfmt->height = vpbe_dev->current_timings.yres;
 658         }
 659
 660         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 661                 pixfmt->bytesperline = pixfmt->width * bpp;
 662
 663         /* Make the bytesperline 32 byte aligned */
 664         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 665
 666         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 667                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 668                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 669         else
 670                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 671
 672         return 0;
 673 }
 674
 675 static int vpbe_display_g_priority(struct file *file, void *priv,
 676                                 enum v4l2_priority *p)
 677 {
 678         struct vpbe_fh *fh = file->private_data;
 679         struct vpbe_layer *layer = fh->layer;
 680
 681         *p = v4l2_prio_max(&layer->prio);
 682
 683         return 0;
 684 }
 685
 686 static int vpbe_display_s_priority(struct file *file, void *priv,
 687                                 enum v4l2_priority p)
 688 {
 689         struct vpbe_fh *fh = file->private_data;
 690         struct vpbe_layer *layer = fh->layer;
 691         int ret;
 692
 693         ret = v4l2_prio_change(&layer->prio, &fh->prio, p);
 694
 695         return ret;
 696 }
 697
 698 static int vpbe_display_querycap(struct file *file, void  *priv,
 699                                struct v4l2_capability *cap)
 700 {
 701         struct vpbe_fh *fh = file->private_data;
 702         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 703
 704         cap->version = VPBE_DISPLAY_VERSION_CODE;
 705         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 706         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 707         snprintf(cap->driver, sizeof(cap->driver), "%s",
 708                 dev_name(vpbe_dev->pdev));
 709         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 710                  dev_name(vpbe_dev->pdev));
 711         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 712
 713         return 0;
 714 }
 715
 716 static int vpbe_display_s_crop(struct file *file, void *priv,
 717                              const struct v4l2_crop *crop)
 718 {
 719         struct vpbe_fh *fh = file->private_data;
 720         struct vpbe_layer *layer = fh->layer;
 721         struct vpbe_display *disp_dev = fh->disp_dev;
 722         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 723         struct osd_layer_config *cfg = &layer->layer_info.config;
 724         struct osd_state *osd_device = disp_dev->osd_device;
 725         struct v4l2_rect rect = crop->c;
 726         int ret;
 727
 728         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 729                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 730
 731         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 732                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 733                 return -EINVAL;
 734         }
 735
 736         if (rect.top < 0)
 737                 rect.top = 0;
 738         if (rect.left < 0)
 739                 rect.left = 0;
 740
 741         vpbe_disp_check_window_params(disp_dev, &rect);
 742
 743         osd_device->ops.get_layer_config(osd_device,
 744                         layer->layer_info.id, cfg);
 745
 746         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 747                                         rect.width,
 748                                         rect.height);
 749         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 750                                         rect.left);
 751         ret = osd_device->ops.set_layer_config(osd_device,
 752                                 layer->layer_info.id, cfg);
 753         if (ret < 0) {
 754                 v4l2_err(&vpbe_dev->v4l2_dev,
 755                         "Error in set layer config:\n");
 756                 return -EINVAL;
 757         }
 758
 759         /* apply zooming and h or v expansion */
 760         osd_device->ops.set_zoom(osd_device,
 761                         layer->layer_info.id,
 762                         layer->layer_info.h_zoom,
 763                         layer->layer_info.v_zoom);
 764         ret = osd_device->ops.set_vid_expansion(osd_device,
 765                         layer->layer_info.h_exp,
 766                         layer->layer_info.v_exp);
 767         if (ret < 0) {
 768                 v4l2_err(&vpbe_dev->v4l2_dev,
 769                 "Error in set vid expansion:\n");
 770                 return -EINVAL;
 771         }
 772
 773         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 774                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 775                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 776                 (layer->layer_info.v_exp != V_EXP_OFF))
 777                 /* Enable expansion filter */
 778                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 779         else
 780                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 781
 782         return 0;
 783 }
 784
 785 static int vpbe_display_g_crop(struct file *file, void *priv,
 786                              struct v4l2_crop *crop)
 787 {
 788         struct vpbe_fh *fh = file->private_data;
 789         struct vpbe_layer *layer = fh->layer;
 790         struct osd_layer_config *cfg = &layer->layer_info.config;
 791         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 792         struct osd_state *osd_device = fh->disp_dev->osd_device;
 793         struct v4l2_rect *rect = &crop->c;
 794
 795         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 796                         "VIDIOC_G_CROP, layer id = %d\n",
 797                         layer->device_id);
 798
 799         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 800                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 801                 return -EINVAL;
 802         }
 803         osd_device->ops.get_layer_config(osd_device,
 804                                 layer->layer_info.id, cfg);
 805         rect->top = cfg->ypos;
 806         rect->left = cfg->xpos;
 807         rect->width = cfg->xsize;
 808         rect->height = cfg->ysize;
 809
 810         return 0;
 811 }
 812
 813 static int vpbe_display_cropcap(struct file *file, void *priv,
 814                               struct v4l2_cropcap *cropcap)
 815 {
 816         struct vpbe_fh *fh = file->private_data;
 817         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 818
 819         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 820
 821         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 822         cropcap->bounds.left = 0;
 823         cropcap->bounds.top = 0;
 824         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 825         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 826         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 827         cropcap->defrect = cropcap->bounds;
 828         return 0;
 829 }
 830
 831 static int vpbe_display_g_fmt(struct file *file, void *priv,
 832                                 struct v4l2_format *fmt)
 833 {
 834         struct vpbe_fh *fh = file->private_data;
 835         struct vpbe_layer *layer = fh->layer;
 836         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 837
 838         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 839                         "VIDIOC_G_FMT, layer id = %d\n",
 840                         layer->device_id);
 841
 842         /* If buffer type is video output */
 843         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 844                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 845                 return -EINVAL;
 846         }
 847         /* Fill in the information about format */
 848         fmt->fmt.pix = layer->pix_fmt;
 849
 850         return 0;
 851 }
 852
 853 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 854                                    struct v4l2_fmtdesc *fmt)
 855 {
 856         struct vpbe_fh *fh = file->private_data;
 857         struct vpbe_layer *layer = fh->layer;
 858         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 859         unsigned int index = 0;
 860
 861         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 862                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 863                                 layer->device_id);
 864         if (fmt->index > 1) {
 865                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 866                 return -EINVAL;
 867         }
 868
 869         /* Fill in the information about format */
 870         index = fmt->index;
 871         memset(fmt, 0, sizeof(*fmt));
 872         fmt->index = index;
 873         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 874         if (index == 0) {
 875                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 876                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 877         } else {
 878                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 879                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int vpbe_display_s_fmt(struct file *file, void *priv,
 886                                 struct v4l2_format *fmt)
 887 {
 888         struct vpbe_fh *fh = file->private_data;
 889         struct vpbe_layer *layer = fh->layer;
 890         struct vpbe_display *disp_dev = fh->disp_dev;
 891         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 892         struct osd_layer_config *cfg  = &layer->layer_info.config;
 893         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 894         struct osd_state *osd_device = disp_dev->osd_device;
 895         int ret;
 896
 897         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 898                         "VIDIOC_S_FMT, layer id = %d\n",
 899                         layer->device_id);
 900
 901         /* If streaming is started, return error */
 902         if (layer->started) {
 903                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 904                 return -EBUSY;
 905         }
 906         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 907                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 908                 return -EINVAL;
 909         }
 910         /* Check for valid pixel format */
 911         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 912         if (ret)
 913                 return ret;
 914
 915         /* YUV420 is requested, check availability of the
 916         other video window */
 917
 918         layer->pix_fmt = *pixfmt;
 919
 920         /* Get osd layer config */
 921         osd_device->ops.get_layer_config(osd_device,
 922                         layer->layer_info.id, cfg);
 923         /* Store the pixel format in the layer object */
 924         cfg->xsize = pixfmt->width;
 925         cfg->ysize = pixfmt->height;
 926         cfg->line_length = pixfmt->bytesperline;
 927         cfg->ypos = 0;
 928         cfg->xpos = 0;
 929         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 930
 931         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 932                 cfg->pixfmt = PIXFMT_YCbCrI;
 933
 934         /* Change of the default pixel format for both video windows */
 935         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 936                 struct vpbe_layer *otherlayer;
 937                 cfg->pixfmt = PIXFMT_NV12;
 938                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 939                                                                 layer);
 940                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 941         }
 942
 943         /* Set the layer config in the osd window */
 944         ret = osd_device->ops.set_layer_config(osd_device,
 945                                 layer->layer_info.id, cfg);
 946         if (ret < 0) {
 947                 v4l2_err(&vpbe_dev->v4l2_dev,
 948                                 "Error in S_FMT params:\n");
 949                 return -EINVAL;
 950         }
 951
 952         /* Readback and fill the local copy of current pix format */
 953         osd_device->ops.get_layer_config(osd_device,
 954                         layer->layer_info.id, cfg);
 955
 956         return 0;
 957 }
 958
 959 static int vpbe_display_try_fmt(struct file *file, void *priv,
 960                                   struct v4l2_format *fmt)
 961 {
 962         struct vpbe_fh *fh = file->private_data;
 963         struct vpbe_display *disp_dev = fh->disp_dev;
 964         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 965         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 966
 967         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 968
 969         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 970                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 971                 return -EINVAL;
 972         }
 973
 974         /* Check for valid field format */
 975         return  vpbe_try_format(disp_dev, pixfmt, 0);
 976
 977 }
 978
 979 /**
 980  * vpbe_display_s_std - Set the given standard in the encoder
 981  *
 982  * Sets the standard if supported by the current encoder. Return the status.
 983  * 0 - success & -EINVAL on error
 984  */
 985 static int vpbe_display_s_std(struct file *file, void *priv,
 986                                 v4l2_std_id std_id)
 987 {
 988         struct vpbe_fh *fh = priv;
 989         struct vpbe_layer *layer = fh->layer;
 990         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 991         int ret;
 992
 993         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
 994
 995         /* If streaming is started, return error */
 996         if (layer->started) {
 997                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 998                 return -EBUSY;
 999         }
1000         if (NULL != vpbe_dev->ops.s_std) {
1001                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1002                 if (ret) {
1003                         v4l2_err(&vpbe_dev->v4l2_dev,
1004                         "Failed to set standard for sub devices\n");
1005                         return -EINVAL;
1006                 }
1007         } else {
1008                 return -EINVAL;
1009         }
1010
1011         return 0;
1012 }
1013
1014 /**
1015  * vpbe_display_g_std - Get the standard in the current encoder
1016  *
1017  * Get the standard in the current encoder. Return the status. 0 - success
1018  * -EINVAL on error
1019  */
1020 static int vpbe_display_g_std(struct file *file, void *priv,
1021                                 v4l2_std_id *std_id)
1022 {
1023         struct vpbe_fh *fh = priv;
1024         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1025
1026         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1027
1028         /* Get the standard from the current encoder */
1029         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1030                 *std_id = vpbe_dev->current_timings.std_id;
1031                 return 0;
1032         }
1033
1034         return -EINVAL;
1035 }
1036
1037 /**
1038  * vpbe_display_enum_output - enumerate outputs
1039  *
1040  * Enumerates the outputs available at the vpbe display
1041  * returns the status, -EINVAL if end of output list
1042  */
1043 static int vpbe_display_enum_output(struct file *file, void *priv,
1044                                     struct v4l2_output *output)
1045 {
1046         struct vpbe_fh *fh = priv;
1047         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1048         int ret;
1049
1050         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1051
1052         /* Enumerate outputs */
1053
1054         if (NULL == vpbe_dev->ops.enum_outputs)
1055                 return -EINVAL;
1056
1057         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1058         if (ret) {
1059                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1060                         "Failed to enumerate outputs\n");
1061                 return -EINVAL;
1062         }
1063
1064         return 0;
1065 }
1066
1067 /**
1068  * vpbe_display_s_output - Set output to
1069  * the output specified by the index
1070  */
1071 static int vpbe_display_s_output(struct file *file, void *priv,
1072                                 unsigned int i)
1073 {
1074         struct vpbe_fh *fh = priv;
1075         struct vpbe_layer *layer = fh->layer;
1076         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1077         int ret;
1078
1079         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1080         /* If streaming is started, return error */
1081         if (layer->started) {
1082                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1083                 return -EBUSY;
1084         }
1085         if (NULL == vpbe_dev->ops.set_output)
1086                 return -EINVAL;
1087
1088         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1089         if (ret) {
1090                 v4l2_err(&vpbe_dev->v4l2_dev,
1091                         "Failed to set output for sub devices\n");
1092                 return -EINVAL;
1093         }
1094
1095         return 0;
1096 }
1097
1098 /**
1099  * vpbe_display_g_output - Get output from subdevice
1100  * for a given by the index
1101  */
1102 static int vpbe_display_g_output(struct file *file, void *priv,
1103                                 unsigned int *i)
1104 {
1105         struct vpbe_fh *fh = priv;
1106         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1107
1108         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1109         /* Get the standard from the current encoder */
1110         *i = vpbe_dev->current_out_index;
1111
1112         return 0;
1113 }
1114
1115 /**
1116  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1117  *
1118  * enum the timings in the current encoder. Return the status. 0 - success
1119  * -EINVAL on error
1120  */
1121 static int
1122 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1123                         struct v4l2_enum_dv_timings *timings)
1124 {
1125         struct vpbe_fh *fh = priv;
1126         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1127         int ret;
1128
1129         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1130
1131         /* Enumerate outputs */
1132         if (NULL == vpbe_dev->ops.enum_dv_timings)
1133                 return -EINVAL;
1134
1135         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1136         if (ret) {
1137                 v4l2_err(&vpbe_dev->v4l2_dev,
1138                         "Failed to enumerate dv timings info\n");
1139                 return -EINVAL;
1140         }
1141
1142         return 0;
1143 }
1144
1145 /**
1146  * vpbe_display_s_dv_timings - Set the dv timings
1147  *
1148  * Set the timings in the current encoder. Return the status. 0 - success
1149  * -EINVAL on error
1150  */
1151 static int
1152 vpbe_display_s_dv_timings(struct file *file, void *priv,
1153                                 struct v4l2_dv_timings *timings)
1154 {
1155         struct vpbe_fh *fh = priv;
1156         struct vpbe_layer *layer = fh->layer;
1157         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1158         int ret;
1159
1160         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1161
1162
1163         /* If streaming is started, return error */
1164         if (layer->started) {
1165                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1166                 return -EBUSY;
1167         }
1168
1169         /* Set the given standard in the encoder */
1170         if (!vpbe_dev->ops.s_dv_timings)
1171                 return -EINVAL;
1172
1173         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1174         if (ret) {
1175                 v4l2_err(&vpbe_dev->v4l2_dev,
1176                         "Failed to set the dv timings info\n");
1177                 return -EINVAL;
1178         }
1179
1180         return 0;
1181 }
1182
1183 /**
1184  * vpbe_display_g_dv_timings - Set the dv timings
1185  *
1186  * Get the timings in the current encoder. Return the status. 0 - success
1187  * -EINVAL on error
1188  */
1189 static int
1190 vpbe_display_g_dv_timings(struct file *file, void *priv,
1191                                 struct v4l2_dv_timings *dv_timings)
1192 {
1193         struct vpbe_fh *fh = priv;
1194         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1195
1196         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1197
1198         /* Get the given standard in the encoder */
1199
1200         if (vpbe_dev->current_timings.timings_type &
1201                                 VPBE_ENC_DV_TIMINGS) {
1202                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1203         } else {
1204                 return -EINVAL;
1205         }
1206
1207         return 0;
1208 }
1209
1210 static int vpbe_display_streamoff(struct file *file, void *priv,
1211                                 enum v4l2_buf_type buf_type)
1212 {
1213         struct vpbe_fh *fh = file->private_data;
1214         struct vpbe_layer *layer = fh->layer;
1215         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1216         struct osd_state *osd_device = fh->disp_dev->osd_device;
1217         int ret;
1218
1219         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1220                         "VIDIOC_STREAMOFF,layer id = %d\n",
1221                         layer->device_id);
1222
1223         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1224                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1225                 return -EINVAL;
1226         }
1227
1228         /* If io is allowed for this file handle, return error */
1229         if (!fh->io_allowed) {
1230                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1231                 return -EACCES;
1232         }
1233
1234         /* If streaming is not started, return error */
1235         if (!layer->started) {
1236                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1237                         " id = %d\n", layer->device_id);
1238                 return -EINVAL;
1239         }
1240
1241         osd_device->ops.disable_layer(osd_device,
1242                         layer->layer_info.id);
1243         layer->started = 0;
1244         ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1245
1246         return ret;
1247 }
1248
1249 static int vpbe_display_streamon(struct file *file, void *priv,
1250                          enum v4l2_buf_type buf_type)
1251 {
1252         struct vpbe_fh *fh = file->private_data;
1253         struct vpbe_layer *layer = fh->layer;
1254         struct vpbe_display *disp_dev = fh->disp_dev;
1255         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1256         struct osd_state *osd_device = disp_dev->osd_device;
1257         int ret;
1258
1259         osd_device->ops.disable_layer(osd_device,
1260                         layer->layer_info.id);
1261
1262         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1263                                                 layer->device_id);
1264
1265         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1266                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1267                 return -EINVAL;
1268         }
1269
1270         /* If file handle is not allowed IO, return error */
1271         if (!fh->io_allowed) {
1272                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1273                 return -EACCES;
1274         }
1275         /* If Streaming is already started, return error */
1276         if (layer->started) {
1277                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1278                 return -EBUSY;
1279         }
1280
1281         /*
1282          * Call vb2_streamon to start streaming
1283          * in videobuf
1284          */
1285         ret = vb2_streamon(&layer->buffer_queue, buf_type);
1286         if (ret) {
1287                 v4l2_err(&vpbe_dev->v4l2_dev,
1288                 "error in vb2_streamon\n");
1289                 return ret;
1290         }
1291         return ret;
1292 }
1293
1294 static int vpbe_display_dqbuf(struct file *file, void *priv,
1295                       struct v4l2_buffer *buf)
1296 {
1297         struct vpbe_fh *fh = file->private_data;
1298         struct vpbe_layer *layer = fh->layer;
1299         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1300         int ret;
1301
1302         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1303                 "VIDIOC_DQBUF, layer id = %d\n",
1304                 layer->device_id);
1305
1306         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1307                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1308                 return -EINVAL;
1309         }
1310         /* If this file handle is not allowed to do IO, return error */
1311         if (!fh->io_allowed) {
1312                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1313                 return -EACCES;
1314         }
1315         if (file->f_flags & O_NONBLOCK)
1316                 /* Call videobuf_dqbuf for non blocking mode */
1317                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1318         else
1319                 /* Call videobuf_dqbuf for blocking mode */
1320                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1321
1322         return ret;
1323 }
1324
1325 static int vpbe_display_qbuf(struct file *file, void *priv,
1326                      struct v4l2_buffer *p)
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
1332         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1333                 "VIDIOC_QBUF, layer id = %d\n",
1334                 layer->device_id);
1335
1336         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1337                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1338                 return -EINVAL;
1339         }
1340
1341         /* If this file handle is not allowed to do IO, return error */
1342         if (!fh->io_allowed) {
1343                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1344                 return -EACCES;
1345         }
1346
1347         return vb2_qbuf(&layer->buffer_queue, p);
1348 }
1349
1350 static int vpbe_display_querybuf(struct file *file, void *priv,
1351                          struct v4l2_buffer *buf)
1352 {
1353         struct vpbe_fh *fh = file->private_data;
1354         struct vpbe_layer *layer = fh->layer;
1355         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1356
1357         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1358                 "VIDIOC_QUERYBUF, layer id = %d\n",
1359                 layer->device_id);
1360
1361         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1362                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1363                 return -EINVAL;
1364         }
1365         /* Call vb2_querybuf to get information */
1366         return vb2_querybuf(&layer->buffer_queue, buf);
1367 }
1368
1369 static int vpbe_display_reqbufs(struct file *file, void *priv,
1370                         struct v4l2_requestbuffers *req_buf)
1371 {
1372         struct vpbe_fh *fh = file->private_data;
1373         struct vpbe_layer *layer = fh->layer;
1374         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1375         struct vb2_queue *q;
1376         int ret;
1377         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1378
1379         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1380                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1381                 return -EINVAL;
1382         }
1383
1384         /* If io users of the layer is not zero, return error */
1385         if (0 != layer->io_usrs) {
1386                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1387                 return -EBUSY;
1388         }
1389         /* Initialize videobuf queue as per the buffer type */
1390         layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1391         if (IS_ERR(layer->alloc_ctx)) {
1392                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1393                 return PTR_ERR(layer->alloc_ctx);
1394         }
1395         q = &layer->buffer_queue;
1396         memset(q, 0, sizeof(*q));
1397         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1398         q->io_modes = VB2_MMAP | VB2_USERPTR;
1399         q->drv_priv = fh;
1400         q->ops = &video_qops;
1401         q->mem_ops = &vb2_dma_contig_memops;
1402         q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1403         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1404
1405         ret = vb2_queue_init(q);
1406         if (ret) {
1407                 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1408                 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1409                 return ret;
1410         }
1411         /* Set io allowed member of file handle to TRUE */
1412         fh->io_allowed = 1;
1413         /* Increment io usrs member of layer object to 1 */
1414         layer->io_usrs = 1;
1415         /* Store type of memory requested in layer object */
1416         layer->memory = req_buf->memory;
1417         /* Initialize buffer queue */
1418         INIT_LIST_HEAD(&layer->dma_queue);
1419         /* Allocate buffers */
1420         return vb2_reqbufs(q, req_buf);
1421 }
1422
1423 /*
1424  * vpbe_display_mmap()
1425  * It is used to map kernel space buffers into user spaces
1426  */
1427 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1428 {
1429         /* Get the layer object and file handle object */
1430         struct vpbe_fh *fh = filep->private_data;
1431         struct vpbe_layer *layer = fh->layer;
1432         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1433         int ret;
1434
1435         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1436
1437         if (mutex_lock_interruptible(&layer->opslock))
1438                 return -ERESTARTSYS;
1439         ret = vb2_mmap(&layer->buffer_queue, vma);
1440         mutex_unlock(&layer->opslock);
1441         return ret;
1442 }
1443
1444 /* vpbe_display_poll(): It is used for select/poll system call
1445  */
1446 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1447 {
1448         struct vpbe_fh *fh = filep->private_data;
1449         struct vpbe_layer *layer = fh->layer;
1450         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1451         unsigned int err = 0;
1452
1453         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1454         if (layer->started) {
1455                 mutex_lock(&layer->opslock);
1456                 err = vb2_poll(&layer->buffer_queue, filep, wait);
1457                 mutex_unlock(&layer->opslock);
1458         }
1459         return err;
1460 }
1461
1462 /*
1463  * vpbe_display_open()
1464  * It creates object of file handle structure and stores it in private_data
1465  * member of filepointer
1466  */
1467 static int vpbe_display_open(struct file *file)
1468 {
1469         struct vpbe_fh *fh = NULL;
1470         struct vpbe_layer *layer = video_drvdata(file);
1471         struct vpbe_display *disp_dev = layer->disp_dev;
1472         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1473         struct osd_state *osd_device = disp_dev->osd_device;
1474         int err;
1475
1476         /* Allocate memory for the file handle object */
1477         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1478         if (fh == NULL) {
1479                 v4l2_err(&vpbe_dev->v4l2_dev,
1480                         "unable to allocate memory for file handle object\n");
1481                 return -ENOMEM;
1482         }
1483         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1484                         "vpbe display open plane = %d\n",
1485                         layer->device_id);
1486
1487         /* store pointer to fh in private_data member of filep */
1488         file->private_data = fh;
1489         fh->layer = layer;
1490         fh->disp_dev = disp_dev;
1491
1492         if (!layer->usrs) {
1493                 if (mutex_lock_interruptible(&layer->opslock))
1494                         return -ERESTARTSYS;
1495                 /* First claim the layer for this device */
1496                 err = osd_device->ops.request_layer(osd_device,
1497                                                 layer->layer_info.id);
1498                 mutex_unlock(&layer->opslock);
1499                 if (err < 0) {
1500                         /* Couldn't get layer */
1501                         v4l2_err(&vpbe_dev->v4l2_dev,
1502                                 "Display Manager failed to allocate layer\n");
1503                         kfree(fh);
1504                         return -EINVAL;
1505                 }
1506         }
1507         /* Increment layer usrs counter */
1508         layer->usrs++;
1509         /* Set io_allowed member to false */
1510         fh->io_allowed = 0;
1511         /* Initialize priority of this instance to default priority */
1512         fh->prio = V4L2_PRIORITY_UNSET;
1513         v4l2_prio_open(&layer->prio, &fh->prio);
1514         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1515                         "vpbe display device opened successfully\n");
1516         return 0;
1517 }
1518
1519 /*
1520  * vpbe_display_release()
1521  * This function deletes buffer queue, frees the buffers and the davinci
1522  * display file * handle
1523  */
1524 static int vpbe_display_release(struct file *file)
1525 {
1526         /* Get the layer object and file handle object */
1527         struct vpbe_fh *fh = file->private_data;
1528         struct vpbe_layer *layer = fh->layer;
1529         struct osd_layer_config *cfg  = &layer->layer_info.config;
1530         struct vpbe_display *disp_dev = fh->disp_dev;
1531         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1532         struct osd_state *osd_device = disp_dev->osd_device;
1533
1534         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1535
1536         mutex_lock(&layer->opslock);
1537         /* if this instance is doing IO */
1538         if (fh->io_allowed) {
1539                 /* Reset io_usrs member of layer object */
1540                 layer->io_usrs = 0;
1541
1542                 osd_device->ops.disable_layer(osd_device,
1543                                 layer->layer_info.id);
1544                 layer->started = 0;
1545                 /* Free buffers allocated */
1546                 vb2_queue_release(&layer->buffer_queue);
1547                 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1548         }
1549
1550         /* Decrement layer usrs counter */
1551         layer->usrs--;
1552         /* If this file handle has initialize encoder device, reset it */
1553         if (!layer->usrs) {
1554                 if (cfg->pixfmt == PIXFMT_NV12) {
1555                         struct vpbe_layer *otherlayer;
1556                         otherlayer =
1557                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1558                         osd_device->ops.disable_layer(osd_device,
1559                                         otherlayer->layer_info.id);
1560                         osd_device->ops.release_layer(osd_device,
1561                                         otherlayer->layer_info.id);
1562                 }
1563                 osd_device->ops.disable_layer(osd_device,
1564                                 layer->layer_info.id);
1565                 osd_device->ops.release_layer(osd_device,
1566                                 layer->layer_info.id);
1567         }
1568         /* Close the priority */
1569         v4l2_prio_close(&layer->prio, fh->prio);
1570         file->private_data = NULL;
1571         mutex_unlock(&layer->opslock);
1572
1573         /* Free memory allocated to file handle object */
1574         kfree(fh);
1575
1576         disp_dev->cbcr_ofst = 0;
1577
1578         return 0;
1579 }
1580
1581 #ifdef CONFIG_VIDEO_ADV_DEBUG
1582 static int vpbe_display_g_register(struct file *file, void *priv,
1583                         struct v4l2_dbg_register *reg)
1584 {
1585         struct v4l2_dbg_match *match = &reg->match;
1586         struct vpbe_fh *fh = file->private_data;
1587         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1588
1589         if (match->type >= 2) {
1590                 v4l2_subdev_call(vpbe_dev->venc,
1591                                  core,
1592                                  g_register,
1593                                  reg);
1594         }
1595
1596         return 0;
1597 }
1598
1599 static int vpbe_display_s_register(struct file *file, void *priv,
1600                         struct v4l2_dbg_register *reg)
1601 {
1602         return 0;
1603 }
1604 #endif
1605
1606 /* vpbe capture ioctl operations */
1607 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1608         .vidioc_querycap         = vpbe_display_querycap,
1609         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1610         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1611         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1612         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1613         .vidioc_reqbufs          = vpbe_display_reqbufs,
1614         .vidioc_querybuf         = vpbe_display_querybuf,
1615         .vidioc_qbuf             = vpbe_display_qbuf,
1616         .vidioc_dqbuf            = vpbe_display_dqbuf,
1617         .vidioc_streamon         = vpbe_display_streamon,
1618         .vidioc_streamoff        = vpbe_display_streamoff,
1619         .vidioc_cropcap          = vpbe_display_cropcap,
1620         .vidioc_g_crop           = vpbe_display_g_crop,
1621         .vidioc_s_crop           = vpbe_display_s_crop,
1622         .vidioc_g_priority       = vpbe_display_g_priority,
1623         .vidioc_s_priority       = vpbe_display_s_priority,
1624         .vidioc_s_std            = vpbe_display_s_std,
1625         .vidioc_g_std            = vpbe_display_g_std,
1626         .vidioc_enum_output      = vpbe_display_enum_output,
1627         .vidioc_s_output         = vpbe_display_s_output,
1628         .vidioc_g_output         = vpbe_display_g_output,
1629         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1630         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1631         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1632 #ifdef CONFIG_VIDEO_ADV_DEBUG
1633         .vidioc_g_register       = vpbe_display_g_register,
1634         .vidioc_s_register       = vpbe_display_s_register,
1635 #endif
1636 };
1637
1638 static struct v4l2_file_operations vpbe_fops = {
1639         .owner = THIS_MODULE,
1640         .open = vpbe_display_open,
1641         .release = vpbe_display_release,
1642         .unlocked_ioctl = video_ioctl2,
1643         .mmap = vpbe_display_mmap,
1644         .poll = vpbe_display_poll
1645 };
1646
1647 static int vpbe_device_get(struct device *dev, void *data)
1648 {
1649         struct platform_device *pdev = to_platform_device(dev);
1650         struct vpbe_display *vpbe_disp  = data;
1651
1652         if (strcmp("vpbe_controller", pdev->name) == 0)
1653                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1654
1655         if (strstr(pdev->name, "vpbe-osd") != NULL)
1656                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1657
1658         return 0;
1659 }
1660
1661 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1662                            struct platform_device *pdev)
1663 {
1664         struct vpbe_layer *vpbe_display_layer = NULL;
1665         struct video_device *vbd = NULL;
1666
1667         /* Allocate memory for four plane display objects */
1668
1669         disp_dev->dev[i] =
1670                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1671
1672         /* If memory allocation fails, return error */
1673         if (!disp_dev->dev[i]) {
1674                 printk(KERN_ERR "ran out of memory\n");
1675                 return  -ENOMEM;
1676         }
1677         spin_lock_init(&disp_dev->dev[i]->irqlock);
1678         mutex_init(&disp_dev->dev[i]->opslock);
1679
1680         /* Get the pointer to the layer object */
1681         vpbe_display_layer = disp_dev->dev[i];
1682         vbd = &vpbe_display_layer->video_dev;
1683         /* Initialize field of video device */
1684         vbd->release    = video_device_release_empty;
1685         vbd->fops       = &vpbe_fops;
1686         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1687         vbd->minor      = -1;
1688         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1689         vbd->lock       = &vpbe_display_layer->opslock;
1690         vbd->vfl_dir    = VFL_DIR_TX;
1691
1692         if (disp_dev->vpbe_dev->current_timings.timings_type &
1693                         VPBE_ENC_STD)
1694                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1695
1696         snprintf(vbd->name, sizeof(vbd->name),
1697                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1698                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1699                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1700                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1701
1702         vpbe_display_layer->device_id = i;
1703
1704         vpbe_display_layer->layer_info.id =
1705                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1706
1707         /* Initialize prio member of layer object */
1708         v4l2_prio_init(&vpbe_display_layer->prio);
1709
1710         return 0;
1711 }
1712
1713 static int register_device(struct vpbe_layer *vpbe_display_layer,
1714                            struct vpbe_display *disp_dev,
1715                            struct platform_device *pdev)
1716 {
1717         int err;
1718
1719         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1720                   "Trying to register VPBE display device.\n");
1721         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1722                   "layer=%x,layer->video_dev=%x\n",
1723                   (int)vpbe_display_layer,
1724                   (int)&vpbe_display_layer->video_dev);
1725
1726         err = video_register_device(&vpbe_display_layer->video_dev,
1727                                     VFL_TYPE_GRABBER,
1728                                     -1);
1729         if (err)
1730                 return -ENODEV;
1731
1732         vpbe_display_layer->disp_dev = disp_dev;
1733         /* set the driver data in platform device */
1734         platform_set_drvdata(pdev, disp_dev);
1735         video_set_drvdata(&vpbe_display_layer->video_dev,
1736                           vpbe_display_layer);
1737
1738         return 0;
1739 }
1740
1741
1742
1743 /*
1744  * vpbe_display_probe()
1745  * This function creates device entries by register itself to the V4L2 driver
1746  * and initializes fields of each layer objects
1747  */
1748 static int vpbe_display_probe(struct platform_device *pdev)
1749 {
1750         struct vpbe_layer *vpbe_display_layer;
1751         struct vpbe_display *disp_dev;
1752         struct resource *res = NULL;
1753         int k;
1754         int i;
1755         int err;
1756         int irq;
1757
1758         printk(KERN_DEBUG "vpbe_display_probe\n");
1759         /* Allocate memory for vpbe_display */
1760         disp_dev = kzalloc(sizeof(struct vpbe_display), GFP_KERNEL);
1761         if (!disp_dev) {
1762                 printk(KERN_ERR "ran out of memory\n");
1763                 return -ENOMEM;
1764         }
1765
1766         spin_lock_init(&disp_dev->dma_queue_lock);
1767         /*
1768          * Scan all the platform devices to find the vpbe
1769          * controller device and get the vpbe_dev object
1770          */
1771         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1772                         vpbe_device_get);
1773         if (err < 0)
1774                 return err;
1775         /* Initialize the vpbe display controller */
1776         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1777                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1778                                                          disp_dev->vpbe_dev);
1779                 if (err) {
1780                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1781                                         "Error initing vpbe\n");
1782                         err = -ENOMEM;
1783                         goto probe_out;
1784                 }
1785         }
1786
1787         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1788                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1789                         err = -ENODEV;
1790                         goto probe_out;
1791                 }
1792         }
1793
1794         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1795         if (!res) {
1796                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1797                          "Unable to get VENC interrupt resource\n");
1798                 err = -ENODEV;
1799                 goto probe_out;
1800         }
1801
1802         irq = res->start;
1803         if (request_irq(irq, venc_isr,  IRQF_DISABLED, VPBE_DISPLAY_DRIVER,
1804                 disp_dev)) {
1805                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1806                                 "Unable to request interrupt\n");
1807                 err = -ENODEV;
1808                 goto probe_out;
1809         }
1810
1811         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1812                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1813                         err = -ENODEV;
1814                         goto probe_out_irq;
1815                 }
1816         }
1817
1818         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1819         return 0;
1820
1821 probe_out_irq:
1822         free_irq(res->start, disp_dev);
1823 probe_out:
1824         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1825                 /* Get the pointer to the layer object */
1826                 vpbe_display_layer = disp_dev->dev[k];
1827                 /* Unregister video device */
1828                 if (vpbe_display_layer) {
1829                         video_unregister_device(
1830                                 &vpbe_display_layer->video_dev);
1831                                 kfree(disp_dev->dev[k]);
1832                 }
1833         }
1834         kfree(disp_dev);
1835         return err;
1836 }
1837
1838 /*
1839  * vpbe_display_remove()
1840  * It un-register hardware layer from V4L2 driver
1841  */
1842 static int vpbe_display_remove(struct platform_device *pdev)
1843 {
1844         struct vpbe_layer *vpbe_display_layer;
1845         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1846         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1847         struct resource *res;
1848         int i;
1849
1850         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1851
1852         /* unregister irq */
1853         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1854         free_irq(res->start, disp_dev);
1855
1856         /* deinitialize the vpbe display controller */
1857         if (NULL != vpbe_dev->ops.deinitialize)
1858                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1859         /* un-register device */
1860         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1861                 /* Get the pointer to the layer object */
1862                 vpbe_display_layer = disp_dev->dev[i];
1863                 /* Unregister video device */
1864                 video_unregister_device(&vpbe_display_layer->video_dev);
1865
1866         }
1867         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1868                 kfree(disp_dev->dev[i]);
1869                 disp_dev->dev[i] = NULL;
1870         }
1871
1872         return 0;
1873 }
1874
1875 static struct platform_driver vpbe_display_driver = {
1876         .driver = {
1877                 .name = VPBE_DISPLAY_DRIVER,
1878                 .owner = THIS_MODULE,
1879                 .bus = &platform_bus_type,
1880         },
1881         .probe = vpbe_display_probe,
1882         .remove = vpbe_display_remove,
1883 };
1884
1885 module_platform_driver(vpbe_display_driver);
1886
1887 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1888 MODULE_LICENSE("GPL");
1889 MODULE_AUTHOR("Texas Instruments");