drivers/media/platform/davinci/vpbe_display.c

   1 /*
   2  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/errno.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/string.h>
  19 #include <linux/wait.h>
  20 #include <linux/time.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/irq.h>
  23 #include <linux/mm.h>
  24 #include <linux/mutex.h>
  25 #include <linux/videodev2.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/pgtable.h>
  29 #include <mach/cputype.h>
  30
  31 #include <media/v4l2-dev.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-ioctl.h>
  34 #include <media/v4l2-device.h>
  35 #include <media/davinci/vpbe_display.h>
  36 #include <media/davinci/vpbe_types.h>
  37 #include <media/davinci/vpbe.h>
  38 #include <media/davinci/vpbe_venc.h>
  39 #include <media/davinci/vpbe_osd.h>
  40 #include "vpbe_venc_regs.h"
  41
  42 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
  43
  44 static int debug;
  45
  46 #define VPBE_DEFAULT_NUM_BUFS 3
  47
  48 module_param(debug, int, 0644);
  49
  50 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
  51                         struct vpbe_layer *layer);
  52
  53 static int venc_is_second_field(struct vpbe_display *disp_dev)
  54 {
  55         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
  56         int ret;
  57         int val;
  58
  59         ret = v4l2_subdev_call(vpbe_dev->venc,
  60                                core,
  61                                ioctl,
  62                                VENC_GET_FLD,
  63                                &val);
  64         if (ret < 0) {
  65                 v4l2_err(&vpbe_dev->v4l2_dev,
  66                          "Error in getting Field ID 0\n");
  67         }
  68         return val;
  69 }
  70
  71 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
  72                                 struct vpbe_layer *layer)
  73 {
  74         struct timespec timevalue;
  75
  76         if (layer->cur_frm == layer->next_frm)
  77                 return;
  78         ktime_get_ts(&timevalue);
  79         layer->cur_frm->vb.v4l2_buf.timestamp.tv_sec =
  80                 timevalue.tv_sec;
  81         layer->cur_frm->vb.v4l2_buf.timestamp.tv_usec =
  82                 timevalue.tv_nsec / NSEC_PER_USEC;
  83         vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_DONE);
  84         /* Make cur_frm pointing to next_frm */
  85         layer->cur_frm = layer->next_frm;
  86 }
  87
  88 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
  89                                 struct vpbe_layer *layer)
  90 {
  91         struct osd_state *osd_device = disp_obj->osd_device;
  92         unsigned long addr;
  93
  94         spin_lock(&disp_obj->dma_queue_lock);
  95         if (list_empty(&layer->dma_queue) ||
  96                 (layer->cur_frm != layer->next_frm)) {
  97                 spin_unlock(&disp_obj->dma_queue_lock);
  98                 return;
  99         }
 100         /*
 101          * one field is displayed configure
 102          * the next frame if it is available
 103          * otherwise hold on current frame
 104          * Get next from the buffer queue
 105          */
 106         layer->next_frm = list_entry(layer->dma_queue.next,
 107                           struct  vpbe_disp_buffer, list);
 108         /* Remove that from the buffer queue */
 109         list_del(&layer->next_frm->list);
 110         spin_unlock(&disp_obj->dma_queue_lock);
 111         /* Mark state of the frame to active */
 112         layer->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 113         addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb, 0);
 114         osd_device->ops.start_layer(osd_device,
 115                         layer->layer_info.id,
 116                         addr,
 117                         disp_obj->cbcr_ofst);
 118 }
 119
 120 /* interrupt service routine */
 121 static irqreturn_t venc_isr(int irq, void *arg)
 122 {
 123         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
 124         struct vpbe_layer *layer;
 125         static unsigned last_event;
 126         unsigned event = 0;
 127         int fid;
 128         int i;
 129
 130         if ((NULL == arg) || (NULL == disp_dev->dev[0]))
 131                 return IRQ_HANDLED;
 132
 133         if (venc_is_second_field(disp_dev))
 134                 event |= VENC_SECOND_FIELD;
 135         else
 136                 event |= VENC_FIRST_FIELD;
 137
 138         if (event == (last_event & ~VENC_END_OF_FRAME)) {
 139                 /*
 140                 * If the display is non-interlaced, then we need to flag the
 141                 * end-of-frame event at every interrupt regardless of the
 142                 * value of the FIDST bit.  We can conclude that the display is
 143                 * non-interlaced if the value of the FIDST bit is unchanged
 144                 * from the previous interrupt.
 145                 */
 146                 event |= VENC_END_OF_FRAME;
 147         } else if (event == VENC_SECOND_FIELD) {
 148                 /* end-of-frame for interlaced display */
 149                 event |= VENC_END_OF_FRAME;
 150         }
 151         last_event = event;
 152
 153         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
 154                 layer = disp_dev->dev[i];
 155                 /* If streaming is started in this layer */
 156                 if (!layer->started)
 157                         continue;
 158
 159                 if (layer->layer_first_int) {
 160                         layer->layer_first_int = 0;
 161                         continue;
 162                 }
 163                 /* Check the field format */
 164                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
 165                         (event & VENC_END_OF_FRAME)) {
 166                         /* Progressive mode */
 167
 168                         vpbe_isr_even_field(disp_dev, layer);
 169                         vpbe_isr_odd_field(disp_dev, layer);
 170                 } else {
 171                 /* Interlaced mode */
 172
 173                         layer->field_id ^= 1;
 174                         if (event & VENC_FIRST_FIELD)
 175                                 fid = 0;
 176                         else
 177                                 fid = 1;
 178
 179                         /*
 180                         * If field id does not match with store
 181                         * field id
 182                         */
 183                         if (fid != layer->field_id) {
 184                                 /* Make them in sync */
 185                                 layer->field_id = fid;
 186                                 continue;
 187                         }
 188                         /*
 189                         * device field id and local field id are
 190                         * in sync. If this is even field
 191                         */
 192                         if (0 == fid)
 193                                 vpbe_isr_even_field(disp_dev, layer);
 194                         else  /* odd field */
 195                                 vpbe_isr_odd_field(disp_dev, layer);
 196                 }
 197         }
 198
 199         return IRQ_HANDLED;
 200 }
 201
 202 /*
 203  * vpbe_buffer_prepare()
 204  * This is the callback function called from vb2_qbuf() function
 205  * the buffer is prepared and user space virtual address is converted into
 206  * physical address
 207  */
 208 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
 209 {
 210         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 211         struct vb2_queue *q = vb->vb2_queue;
 212         struct vpbe_layer *layer = fh->layer;
 213         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 214         unsigned long addr;
 215
 216         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 217                                 "vpbe_buffer_prepare\n");
 218
 219         if (vb->state != VB2_BUF_STATE_ACTIVE &&
 220                 vb->state != VB2_BUF_STATE_PREPARED) {
 221                 vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
 222                 if (vb2_plane_vaddr(vb, 0) &&
 223                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 224                         return -EINVAL;
 225
 226                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 227                 if (q->streaming) {
 228                         if (!IS_ALIGNED(addr, 8)) {
 229                                 v4l2_err(&vpbe_dev->v4l2_dev,
 230                                         "buffer_prepare:offset is \
 231                                         not aligned to 32 bytes\n");
 232                                 return -EINVAL;
 233                         }
 234                 }
 235         }
 236         return 0;
 237 }
 238
 239 /*
 240  * vpbe_buffer_setup()
 241  * This function allocates memory for the buffers
 242  */
 243 static int
 244 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 245                         unsigned int *nbuffers, unsigned int *nplanes,
 246                         unsigned int sizes[], void *alloc_ctxs[])
 247
 248 {
 249         /* Get the file handle object and layer object */
 250         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 251         struct vpbe_layer *layer = fh->layer;
 252         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 253
 254         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 255
 256         /* Store number of buffers allocated in numbuffer member */
 257         if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
 258                 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
 259
 260         *nplanes = 1;
 261         sizes[0] = layer->pix_fmt.sizeimage;
 262         alloc_ctxs[0] = layer->alloc_ctx;
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * vpbe_buffer_queue()
 269  * This function adds the buffer to DMA queue
 270  */
 271 static void vpbe_buffer_queue(struct vb2_buffer *vb)
 272 {
 273         /* Get the file handle object and layer object */
 274         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 275         struct vpbe_disp_buffer *buf = container_of(vb,
 276                                 struct vpbe_disp_buffer, vb);
 277         struct vpbe_layer *layer = fh->layer;
 278         struct vpbe_display *disp = fh->disp_dev;
 279         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 280         unsigned long flags;
 281
 282         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 283                         "vpbe_buffer_queue\n");
 284
 285         /* add the buffer to the DMA queue */
 286         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 287         list_add_tail(&buf->list, &layer->dma_queue);
 288         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 289 }
 290
 291 /*
 292  * vpbe_buf_cleanup()
 293  * This function is called from the vb2 layer to free memory allocated to
 294  * the buffers
 295  */
 296 static void vpbe_buf_cleanup(struct vb2_buffer *vb)
 297 {
 298         /* Get the file handle object and layer object */
 299         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
 300         struct vpbe_layer *layer = fh->layer;
 301         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 302         struct vpbe_disp_buffer *buf = container_of(vb,
 303                                         struct vpbe_disp_buffer, vb);
 304         unsigned long flags;
 305
 306         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 307                         "vpbe_buf_cleanup\n");
 308
 309         spin_lock_irqsave(&layer->irqlock, flags);
 310         if (vb->state == VB2_BUF_STATE_ACTIVE)
 311                 list_del_init(&buf->list);
 312         spin_unlock_irqrestore(&layer->irqlock, flags);
 313 }
 314
 315 static void vpbe_wait_prepare(struct vb2_queue *vq)
 316 {
 317         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 318         struct vpbe_layer *layer = fh->layer;
 319
 320         mutex_unlock(&layer->opslock);
 321 }
 322
 323 static void vpbe_wait_finish(struct vb2_queue *vq)
 324 {
 325         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 326         struct vpbe_layer *layer = fh->layer;
 327
 328         mutex_lock(&layer->opslock);
 329 }
 330
 331 static int vpbe_buffer_init(struct vb2_buffer *vb)
 332 {
 333         struct vpbe_disp_buffer *buf = container_of(vb,
 334                                         struct vpbe_disp_buffer, vb);
 335
 336         INIT_LIST_HEAD(&buf->list);
 337         return 0;
 338 }
 339
 340 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
 341 {
 342         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 343         struct vpbe_layer *layer = fh->layer;
 344         int ret;
 345
 346         /* Get the next frame from the buffer queue */
 347         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 348                                 struct vpbe_disp_buffer, list);
 349         /* Remove buffer from the buffer queue */
 350         list_del(&layer->cur_frm->list);
 351         /* Mark state of the current frame to active */
 352         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 353         /* Initialize field_id and started member */
 354         layer->field_id = 0;
 355
 356         /* Set parameters in OSD and VENC */
 357         ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
 358         if (ret < 0) {
 359                 struct vpbe_disp_buffer *buf, *tmp;
 360
 361                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_QUEUED);
 362                 list_for_each_entry_safe(buf, tmp, &layer->dma_queue, list) {
 363                         list_del(&buf->list);
 364                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 365                 }
 366
 367                 return ret;
 368         }
 369
 370         /*
 371          * if request format is yuv420 semiplanar, need to
 372          * enable both video windows
 373          */
 374         layer->started = 1;
 375         layer->layer_first_int = 1;
 376
 377         return ret;
 378 }
 379
 380 static void vpbe_stop_streaming(struct vb2_queue *vq)
 381 {
 382         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
 383         struct vpbe_layer *layer = fh->layer;
 384         struct vpbe_display *disp = fh->disp_dev;
 385         unsigned long flags;
 386
 387         if (!vb2_is_streaming(vq))
 388                 return;
 389
 390         /* release all active buffers */
 391         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 392         if (layer->cur_frm == layer->next_frm) {
 393                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_ERROR);
 394         } else {
 395                 if (layer->cur_frm != NULL)
 396                         vb2_buffer_done(&layer->cur_frm->vb,
 397                                         VB2_BUF_STATE_ERROR);
 398                 if (layer->next_frm != NULL)
 399                         vb2_buffer_done(&layer->next_frm->vb,
 400                                         VB2_BUF_STATE_ERROR);
 401         }
 402
 403         while (!list_empty(&layer->dma_queue)) {
 404                 layer->next_frm = list_entry(layer->dma_queue.next,
 405                                                 struct vpbe_disp_buffer, list);
 406                 list_del(&layer->next_frm->list);
 407                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
 408         }
 409         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 410 }
 411
 412 static struct vb2_ops video_qops = {
 413         .queue_setup = vpbe_buffer_queue_setup,
 414         .wait_prepare = vpbe_wait_prepare,
 415         .wait_finish = vpbe_wait_finish,
 416         .buf_init = vpbe_buffer_init,
 417         .buf_prepare = vpbe_buffer_prepare,
 418         .start_streaming = vpbe_start_streaming,
 419         .stop_streaming = vpbe_stop_streaming,
 420         .buf_cleanup = vpbe_buf_cleanup,
 421         .buf_queue = vpbe_buffer_queue,
 422 };
 423
 424 static
 425 struct vpbe_layer*
 426 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 427                         struct vpbe_layer *layer)
 428 {
 429         enum vpbe_display_device_id thiswin, otherwin;
 430         thiswin = layer->device_id;
 431
 432         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 433         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 434         return disp_dev->dev[otherwin];
 435 }
 436
 437 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 438                         struct vpbe_layer *layer)
 439 {
 440         struct osd_layer_config *cfg  = &layer->layer_info.config;
 441         struct osd_state *osd_device = disp_dev->osd_device;
 442         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 443         unsigned long addr;
 444         int ret;
 445
 446         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
 447         /* Set address in the display registers */
 448         osd_device->ops.start_layer(osd_device,
 449                                     layer->layer_info.id,
 450                                     addr,
 451                                     disp_dev->cbcr_ofst);
 452
 453         ret = osd_device->ops.enable_layer(osd_device,
 454                                 layer->layer_info.id, 0);
 455         if (ret < 0) {
 456                 v4l2_err(&vpbe_dev->v4l2_dev,
 457                         "Error in enabling osd window layer 0\n");
 458                 return -1;
 459         }
 460
 461         /* Enable the window */
 462         layer->layer_info.enable = 1;
 463         if (cfg->pixfmt == PIXFMT_NV12) {
 464                 struct vpbe_layer *otherlayer =
 465                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 466
 467                 ret = osd_device->ops.enable_layer(osd_device,
 468                                 otherlayer->layer_info.id, 1);
 469                 if (ret < 0) {
 470                         v4l2_err(&vpbe_dev->v4l2_dev,
 471                                 "Error in enabling osd window layer 1\n");
 472                         return -1;
 473                 }
 474                 otherlayer->layer_info.enable = 1;
 475         }
 476         return 0;
 477 }
 478
 479 static void
 480 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 481                         struct vpbe_layer *layer,
 482                         int expected_xsize, int expected_ysize)
 483 {
 484         struct display_layer_info *layer_info = &layer->layer_info;
 485         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 486         struct osd_layer_config *cfg  = &layer->layer_info.config;
 487         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 488         int calculated_xsize;
 489         int h_exp = 0;
 490         int v_exp = 0;
 491         int h_scale;
 492         int v_scale;
 493
 494         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 495
 496         /*
 497          * Application initially set the image format. Current display
 498          * size is obtained from the vpbe display controller. expected_xsize
 499          * and expected_ysize are set through S_CROP ioctl. Based on this,
 500          * driver will calculate the scale factors for vertical and
 501          * horizontal direction so that the image is displayed scaled
 502          * and expanded. Application uses expansion to display the image
 503          * in a square pixel. Otherwise it is displayed using displays
 504          * pixel aspect ratio.It is expected that application chooses
 505          * the crop coordinates for cropped or scaled display. if crop
 506          * size is less than the image size, it is displayed cropped or
 507          * it is displayed scaled and/or expanded.
 508          *
 509          * to begin with, set the crop window same as expected. Later we
 510          * will override with scaled window size
 511          */
 512
 513         cfg->xsize = pixfmt->width;
 514         cfg->ysize = pixfmt->height;
 515         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 516         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 517         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 518         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 519
 520         if (pixfmt->width < expected_xsize) {
 521                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 522                 if (h_scale < 2)
 523                         h_scale = 1;
 524                 else if (h_scale >= 4)
 525                         h_scale = 4;
 526                 else
 527                         h_scale = 2;
 528                 cfg->xsize *= h_scale;
 529                 if (cfg->xsize < expected_xsize) {
 530                         if ((standard_id & V4L2_STD_525_60) ||
 531                         (standard_id & V4L2_STD_625_50)) {
 532                                 calculated_xsize = (cfg->xsize *
 533                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 534                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 535                                 if (calculated_xsize <= expected_xsize) {
 536                                         h_exp = 1;
 537                                         cfg->xsize = calculated_xsize;
 538                                 }
 539                         }
 540                 }
 541                 if (h_scale == 2)
 542                         layer_info->h_zoom = ZOOM_X2;
 543                 else if (h_scale == 4)
 544                         layer_info->h_zoom = ZOOM_X4;
 545                 if (h_exp)
 546                         layer_info->h_exp = H_EXP_9_OVER_8;
 547         } else {
 548                 /* no scaling, only cropping. Set display area to crop area */
 549                 cfg->xsize = expected_xsize;
 550         }
 551
 552         if (pixfmt->height < expected_ysize) {
 553                 v_scale = expected_ysize / pixfmt->height;
 554                 if (v_scale < 2)
 555                         v_scale = 1;
 556                 else if (v_scale >= 4)
 557                         v_scale = 4;
 558                 else
 559                         v_scale = 2;
 560                 cfg->ysize *= v_scale;
 561                 if (cfg->ysize < expected_ysize) {
 562                         if ((standard_id & V4L2_STD_625_50)) {
 563                                 calculated_xsize = (cfg->ysize *
 564                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 565                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 566                                 if (calculated_xsize <= expected_ysize) {
 567                                         v_exp = 1;
 568                                         cfg->ysize = calculated_xsize;
 569                                 }
 570                         }
 571                 }
 572                 if (v_scale == 2)
 573                         layer_info->v_zoom = ZOOM_X2;
 574                 else if (v_scale == 4)
 575                         layer_info->v_zoom = ZOOM_X4;
 576                 if (v_exp)
 577                         layer_info->h_exp = V_EXP_6_OVER_5;
 578         } else {
 579                 /* no scaling, only cropping. Set display area to crop area */
 580                 cfg->ysize = expected_ysize;
 581         }
 582         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 583                 "crop display xsize = %d, ysize = %d\n",
 584                 cfg->xsize, cfg->ysize);
 585 }
 586
 587 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 588                         struct vpbe_layer *layer,
 589                         int top, int left)
 590 {
 591         struct osd_layer_config *cfg = &layer->layer_info.config;
 592         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 593
 594         cfg->xpos = min((unsigned int)left,
 595                         vpbe_dev->current_timings.xres - cfg->xsize);
 596         cfg->ypos = min((unsigned int)top,
 597                         vpbe_dev->current_timings.yres - cfg->ysize);
 598
 599         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 600                 "new xpos = %d, ypos = %d\n",
 601                 cfg->xpos, cfg->ypos);
 602 }
 603
 604 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 605                         struct v4l2_rect *c)
 606 {
 607         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 608
 609         if ((c->width == 0) ||
 610           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 611                 c->width = vpbe_dev->current_timings.xres - c->left;
 612
 613         if ((c->height == 0) || ((c->height + c->top) >
 614           vpbe_dev->current_timings.yres))
 615                 c->height = vpbe_dev->current_timings.yres - c->top;
 616
 617         /* window height must be even for interlaced display */
 618         if (vpbe_dev->current_timings.interlaced)
 619                 c->height &= (~0x01);
 620
 621 }
 622
 623 /**
 624  * vpbe_try_format()
 625  * If user application provides width and height, and have bytesperline set
 626  * to zero, driver calculates bytesperline and sizeimage based on hardware
 627  * limits.
 628  */
 629 static int vpbe_try_format(struct vpbe_display *disp_dev,
 630                         struct v4l2_pix_format *pixfmt, int check)
 631 {
 632         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 633         int min_height = 1;
 634         int min_width = 32;
 635         int max_height;
 636         int max_width;
 637         int bpp;
 638
 639         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 640             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 641                 /* choose default as V4L2_PIX_FMT_UYVY */
 642                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 643
 644         /* Check the field format */
 645         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 646                 (pixfmt->field != V4L2_FIELD_NONE)) {
 647                 if (vpbe_dev->current_timings.interlaced)
 648                         pixfmt->field = V4L2_FIELD_INTERLACED;
 649                 else
 650                         pixfmt->field = V4L2_FIELD_NONE;
 651         }
 652
 653         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 654                 min_height = 2;
 655
 656         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 657                 bpp = 1;
 658         else
 659                 bpp = 2;
 660
 661         max_width = vpbe_dev->current_timings.xres;
 662         max_height = vpbe_dev->current_timings.yres;
 663
 664         min_width /= bpp;
 665
 666         if (!pixfmt->width || (pixfmt->width < min_width) ||
 667                 (pixfmt->width > max_width)) {
 668                 pixfmt->width = vpbe_dev->current_timings.xres;
 669         }
 670
 671         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 672                 (pixfmt->height  > max_height)) {
 673                 pixfmt->height = vpbe_dev->current_timings.yres;
 674         }
 675
 676         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 677                 pixfmt->bytesperline = pixfmt->width * bpp;
 678
 679         /* Make the bytesperline 32 byte aligned */
 680         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 681
 682         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 683                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 684                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 685         else
 686                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 687
 688         return 0;
 689 }
 690
 691 static int vpbe_display_querycap(struct file *file, void  *priv,
 692                                struct v4l2_capability *cap)
 693 {
 694         struct vpbe_fh *fh = file->private_data;
 695         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 696
 697         cap->version = VPBE_DISPLAY_VERSION_CODE;
 698         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 699         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 700         snprintf(cap->driver, sizeof(cap->driver), "%s",
 701                 dev_name(vpbe_dev->pdev));
 702         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 703                  dev_name(vpbe_dev->pdev));
 704         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 705
 706         return 0;
 707 }
 708
 709 static int vpbe_display_s_crop(struct file *file, void *priv,
 710                              const struct v4l2_crop *crop)
 711 {
 712         struct vpbe_fh *fh = file->private_data;
 713         struct vpbe_layer *layer = fh->layer;
 714         struct vpbe_display *disp_dev = fh->disp_dev;
 715         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 716         struct osd_layer_config *cfg = &layer->layer_info.config;
 717         struct osd_state *osd_device = disp_dev->osd_device;
 718         struct v4l2_rect rect = crop->c;
 719         int ret;
 720
 721         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 722                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 723
 724         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 725                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 726                 return -EINVAL;
 727         }
 728
 729         if (rect.top < 0)
 730                 rect.top = 0;
 731         if (rect.left < 0)
 732                 rect.left = 0;
 733
 734         vpbe_disp_check_window_params(disp_dev, &rect);
 735
 736         osd_device->ops.get_layer_config(osd_device,
 737                         layer->layer_info.id, cfg);
 738
 739         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 740                                         rect.width,
 741                                         rect.height);
 742         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 743                                         rect.left);
 744         ret = osd_device->ops.set_layer_config(osd_device,
 745                                 layer->layer_info.id, cfg);
 746         if (ret < 0) {
 747                 v4l2_err(&vpbe_dev->v4l2_dev,
 748                         "Error in set layer config:\n");
 749                 return -EINVAL;
 750         }
 751
 752         /* apply zooming and h or v expansion */
 753         osd_device->ops.set_zoom(osd_device,
 754                         layer->layer_info.id,
 755                         layer->layer_info.h_zoom,
 756                         layer->layer_info.v_zoom);
 757         ret = osd_device->ops.set_vid_expansion(osd_device,
 758                         layer->layer_info.h_exp,
 759                         layer->layer_info.v_exp);
 760         if (ret < 0) {
 761                 v4l2_err(&vpbe_dev->v4l2_dev,
 762                 "Error in set vid expansion:\n");
 763                 return -EINVAL;
 764         }
 765
 766         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 767                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 768                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 769                 (layer->layer_info.v_exp != V_EXP_OFF))
 770                 /* Enable expansion filter */
 771                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 772         else
 773                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 774
 775         return 0;
 776 }
 777
 778 static int vpbe_display_g_crop(struct file *file, void *priv,
 779                              struct v4l2_crop *crop)
 780 {
 781         struct vpbe_fh *fh = file->private_data;
 782         struct vpbe_layer *layer = fh->layer;
 783         struct osd_layer_config *cfg = &layer->layer_info.config;
 784         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 785         struct osd_state *osd_device = fh->disp_dev->osd_device;
 786         struct v4l2_rect *rect = &crop->c;
 787
 788         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 789                         "VIDIOC_G_CROP, layer id = %d\n",
 790                         layer->device_id);
 791
 792         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 793                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 794                 return -EINVAL;
 795         }
 796         osd_device->ops.get_layer_config(osd_device,
 797                                 layer->layer_info.id, cfg);
 798         rect->top = cfg->ypos;
 799         rect->left = cfg->xpos;
 800         rect->width = cfg->xsize;
 801         rect->height = cfg->ysize;
 802
 803         return 0;
 804 }
 805
 806 static int vpbe_display_cropcap(struct file *file, void *priv,
 807                               struct v4l2_cropcap *cropcap)
 808 {
 809         struct vpbe_fh *fh = file->private_data;
 810         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 811
 812         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 813
 814         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 815         cropcap->bounds.left = 0;
 816         cropcap->bounds.top = 0;
 817         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 818         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 819         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 820         cropcap->defrect = cropcap->bounds;
 821         return 0;
 822 }
 823
 824 static int vpbe_display_g_fmt(struct file *file, void *priv,
 825                                 struct v4l2_format *fmt)
 826 {
 827         struct vpbe_fh *fh = file->private_data;
 828         struct vpbe_layer *layer = fh->layer;
 829         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 830
 831         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 832                         "VIDIOC_G_FMT, layer id = %d\n",
 833                         layer->device_id);
 834
 835         /* If buffer type is video output */
 836         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 837                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 838                 return -EINVAL;
 839         }
 840         /* Fill in the information about format */
 841         fmt->fmt.pix = layer->pix_fmt;
 842
 843         return 0;
 844 }
 845
 846 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 847                                    struct v4l2_fmtdesc *fmt)
 848 {
 849         struct vpbe_fh *fh = file->private_data;
 850         struct vpbe_layer *layer = fh->layer;
 851         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 852         unsigned int index = 0;
 853
 854         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 855                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 856                                 layer->device_id);
 857         if (fmt->index > 1) {
 858                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 859                 return -EINVAL;
 860         }
 861
 862         /* Fill in the information about format */
 863         index = fmt->index;
 864         memset(fmt, 0, sizeof(*fmt));
 865         fmt->index = index;
 866         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 867         if (index == 0) {
 868                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 869                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 870         } else {
 871                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 872                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 873         }
 874
 875         return 0;
 876 }
 877
 878 static int vpbe_display_s_fmt(struct file *file, void *priv,
 879                                 struct v4l2_format *fmt)
 880 {
 881         struct vpbe_fh *fh = file->private_data;
 882         struct vpbe_layer *layer = fh->layer;
 883         struct vpbe_display *disp_dev = fh->disp_dev;
 884         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 885         struct osd_layer_config *cfg  = &layer->layer_info.config;
 886         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 887         struct osd_state *osd_device = disp_dev->osd_device;
 888         int ret;
 889
 890         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 891                         "VIDIOC_S_FMT, layer id = %d\n",
 892                         layer->device_id);
 893
 894         /* If streaming is started, return error */
 895         if (layer->started) {
 896                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 897                 return -EBUSY;
 898         }
 899         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 900                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 901                 return -EINVAL;
 902         }
 903         /* Check for valid pixel format */
 904         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 905         if (ret)
 906                 return ret;
 907
 908         /* YUV420 is requested, check availability of the
 909         other video window */
 910
 911         layer->pix_fmt = *pixfmt;
 912         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
 913                 struct vpbe_layer *otherlayer;
 914
 915                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
 916                 /* if other layer is available, only
 917                  * claim it, do not configure it
 918                  */
 919                 ret = osd_device->ops.request_layer(osd_device,
 920                                                     otherlayer->layer_info.id);
 921                 if (ret < 0) {
 922                         v4l2_err(&vpbe_dev->v4l2_dev,
 923                                  "Display Manager failed to allocate layer\n");
 924                         return -EBUSY;
 925                 }
 926         }
 927
 928         /* Get osd layer config */
 929         osd_device->ops.get_layer_config(osd_device,
 930                         layer->layer_info.id, cfg);
 931         /* Store the pixel format in the layer object */
 932         cfg->xsize = pixfmt->width;
 933         cfg->ysize = pixfmt->height;
 934         cfg->line_length = pixfmt->bytesperline;
 935         cfg->ypos = 0;
 936         cfg->xpos = 0;
 937         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 938
 939         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 940                 cfg->pixfmt = PIXFMT_YCBCRI;
 941
 942         /* Change of the default pixel format for both video windows */
 943         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 944                 struct vpbe_layer *otherlayer;
 945                 cfg->pixfmt = PIXFMT_NV12;
 946                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 947                                                                 layer);
 948                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 949         }
 950
 951         /* Set the layer config in the osd window */
 952         ret = osd_device->ops.set_layer_config(osd_device,
 953                                 layer->layer_info.id, cfg);
 954         if (ret < 0) {
 955                 v4l2_err(&vpbe_dev->v4l2_dev,
 956                                 "Error in S_FMT params:\n");
 957                 return -EINVAL;
 958         }
 959
 960         /* Readback and fill the local copy of current pix format */
 961         osd_device->ops.get_layer_config(osd_device,
 962                         layer->layer_info.id, cfg);
 963
 964         return 0;
 965 }
 966
 967 static int vpbe_display_try_fmt(struct file *file, void *priv,
 968                                   struct v4l2_format *fmt)
 969 {
 970         struct vpbe_fh *fh = file->private_data;
 971         struct vpbe_display *disp_dev = fh->disp_dev;
 972         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 973         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 974
 975         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 976
 977         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 978                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 979                 return -EINVAL;
 980         }
 981
 982         /* Check for valid field format */
 983         return  vpbe_try_format(disp_dev, pixfmt, 0);
 984
 985 }
 986
 987 /**
 988  * vpbe_display_s_std - Set the given standard in the encoder
 989  *
 990  * Sets the standard if supported by the current encoder. Return the status.
 991  * 0 - success & -EINVAL on error
 992  */
 993 static int vpbe_display_s_std(struct file *file, void *priv,
 994                                 v4l2_std_id std_id)
 995 {
 996         struct vpbe_fh *fh = priv;
 997         struct vpbe_layer *layer = fh->layer;
 998         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
 999         int ret;
1000
1001         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
1002
1003         /* If streaming is started, return error */
1004         if (layer->started) {
1005                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1006                 return -EBUSY;
1007         }
1008         if (NULL != vpbe_dev->ops.s_std) {
1009                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1010                 if (ret) {
1011                         v4l2_err(&vpbe_dev->v4l2_dev,
1012                         "Failed to set standard for sub devices\n");
1013                         return -EINVAL;
1014                 }
1015         } else {
1016                 return -EINVAL;
1017         }
1018
1019         return 0;
1020 }
1021
1022 /**
1023  * vpbe_display_g_std - Get the standard in the current encoder
1024  *
1025  * Get the standard in the current encoder. Return the status. 0 - success
1026  * -EINVAL on error
1027  */
1028 static int vpbe_display_g_std(struct file *file, void *priv,
1029                                 v4l2_std_id *std_id)
1030 {
1031         struct vpbe_fh *fh = priv;
1032         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1033
1034         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1035
1036         /* Get the standard from the current encoder */
1037         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1038                 *std_id = vpbe_dev->current_timings.std_id;
1039                 return 0;
1040         }
1041
1042         return -EINVAL;
1043 }
1044
1045 /**
1046  * vpbe_display_enum_output - enumerate outputs
1047  *
1048  * Enumerates the outputs available at the vpbe display
1049  * returns the status, -EINVAL if end of output list
1050  */
1051 static int vpbe_display_enum_output(struct file *file, void *priv,
1052                                     struct v4l2_output *output)
1053 {
1054         struct vpbe_fh *fh = priv;
1055         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1056         int ret;
1057
1058         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1059
1060         /* Enumerate outputs */
1061
1062         if (NULL == vpbe_dev->ops.enum_outputs)
1063                 return -EINVAL;
1064
1065         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1066         if (ret) {
1067                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1068                         "Failed to enumerate outputs\n");
1069                 return -EINVAL;
1070         }
1071
1072         return 0;
1073 }
1074
1075 /**
1076  * vpbe_display_s_output - Set output to
1077  * the output specified by the index
1078  */
1079 static int vpbe_display_s_output(struct file *file, void *priv,
1080                                 unsigned int i)
1081 {
1082         struct vpbe_fh *fh = priv;
1083         struct vpbe_layer *layer = fh->layer;
1084         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1085         int ret;
1086
1087         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1088         /* If streaming is started, return error */
1089         if (layer->started) {
1090                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1091                 return -EBUSY;
1092         }
1093         if (NULL == vpbe_dev->ops.set_output)
1094                 return -EINVAL;
1095
1096         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1097         if (ret) {
1098                 v4l2_err(&vpbe_dev->v4l2_dev,
1099                         "Failed to set output for sub devices\n");
1100                 return -EINVAL;
1101         }
1102
1103         return 0;
1104 }
1105
1106 /**
1107  * vpbe_display_g_output - Get output from subdevice
1108  * for a given by the index
1109  */
1110 static int vpbe_display_g_output(struct file *file, void *priv,
1111                                 unsigned int *i)
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_OUTPUT\n");
1117         /* Get the standard from the current encoder */
1118         *i = vpbe_dev->current_out_index;
1119
1120         return 0;
1121 }
1122
1123 /**
1124  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1125  *
1126  * enum the timings in the current encoder. Return the status. 0 - success
1127  * -EINVAL on error
1128  */
1129 static int
1130 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1131                         struct v4l2_enum_dv_timings *timings)
1132 {
1133         struct vpbe_fh *fh = priv;
1134         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1135         int ret;
1136
1137         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1138
1139         /* Enumerate outputs */
1140         if (NULL == vpbe_dev->ops.enum_dv_timings)
1141                 return -EINVAL;
1142
1143         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1144         if (ret) {
1145                 v4l2_err(&vpbe_dev->v4l2_dev,
1146                         "Failed to enumerate dv timings info\n");
1147                 return -EINVAL;
1148         }
1149
1150         return 0;
1151 }
1152
1153 /**
1154  * vpbe_display_s_dv_timings - Set the dv timings
1155  *
1156  * Set the timings in the current encoder. Return the status. 0 - success
1157  * -EINVAL on error
1158  */
1159 static int
1160 vpbe_display_s_dv_timings(struct file *file, void *priv,
1161                                 struct v4l2_dv_timings *timings)
1162 {
1163         struct vpbe_fh *fh = priv;
1164         struct vpbe_layer *layer = fh->layer;
1165         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1166         int ret;
1167
1168         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1169
1170
1171         /* If streaming is started, return error */
1172         if (layer->started) {
1173                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1174                 return -EBUSY;
1175         }
1176
1177         /* Set the given standard in the encoder */
1178         if (!vpbe_dev->ops.s_dv_timings)
1179                 return -EINVAL;
1180
1181         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1182         if (ret) {
1183                 v4l2_err(&vpbe_dev->v4l2_dev,
1184                         "Failed to set the dv timings info\n");
1185                 return -EINVAL;
1186         }
1187
1188         return 0;
1189 }
1190
1191 /**
1192  * vpbe_display_g_dv_timings - Set the dv timings
1193  *
1194  * Get the timings in the current encoder. Return the status. 0 - success
1195  * -EINVAL on error
1196  */
1197 static int
1198 vpbe_display_g_dv_timings(struct file *file, void *priv,
1199                                 struct v4l2_dv_timings *dv_timings)
1200 {
1201         struct vpbe_fh *fh = priv;
1202         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1203
1204         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1205
1206         /* Get the given standard in the encoder */
1207
1208         if (vpbe_dev->current_timings.timings_type &
1209                                 VPBE_ENC_DV_TIMINGS) {
1210                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1211         } else {
1212                 return -EINVAL;
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int vpbe_display_streamoff(struct file *file, void *priv,
1219                                 enum v4l2_buf_type buf_type)
1220 {
1221         struct vpbe_fh *fh = file->private_data;
1222         struct vpbe_layer *layer = fh->layer;
1223         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1224         struct osd_state *osd_device = fh->disp_dev->osd_device;
1225         int ret;
1226
1227         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1228                         "VIDIOC_STREAMOFF,layer id = %d\n",
1229                         layer->device_id);
1230
1231         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1232                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1233                 return -EINVAL;
1234         }
1235
1236         /* If io is allowed for this file handle, return error */
1237         if (!fh->io_allowed) {
1238                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1239                 return -EACCES;
1240         }
1241
1242         /* If streaming is not started, return error */
1243         if (!layer->started) {
1244                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1245                         " id = %d\n", layer->device_id);
1246                 return -EINVAL;
1247         }
1248
1249         osd_device->ops.disable_layer(osd_device,
1250                         layer->layer_info.id);
1251         layer->started = 0;
1252         ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1253
1254         return ret;
1255 }
1256
1257 static int vpbe_display_streamon(struct file *file, void *priv,
1258                          enum v4l2_buf_type buf_type)
1259 {
1260         struct vpbe_fh *fh = file->private_data;
1261         struct vpbe_layer *layer = fh->layer;
1262         struct vpbe_display *disp_dev = fh->disp_dev;
1263         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1264         struct osd_state *osd_device = disp_dev->osd_device;
1265         int ret;
1266
1267         osd_device->ops.disable_layer(osd_device,
1268                         layer->layer_info.id);
1269
1270         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1271                                                 layer->device_id);
1272
1273         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1274                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1275                 return -EINVAL;
1276         }
1277
1278         /* If file handle is not allowed IO, return error */
1279         if (!fh->io_allowed) {
1280                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1281                 return -EACCES;
1282         }
1283         /* If Streaming is already started, return error */
1284         if (layer->started) {
1285                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1286                 return -EBUSY;
1287         }
1288
1289         /*
1290          * Call vb2_streamon to start streaming
1291          * in videobuf
1292          */
1293         ret = vb2_streamon(&layer->buffer_queue, buf_type);
1294         if (ret) {
1295                 v4l2_err(&vpbe_dev->v4l2_dev,
1296                 "error in vb2_streamon\n");
1297                 return ret;
1298         }
1299         return ret;
1300 }
1301
1302 static int vpbe_display_dqbuf(struct file *file, void *priv,
1303                       struct v4l2_buffer *buf)
1304 {
1305         struct vpbe_fh *fh = file->private_data;
1306         struct vpbe_layer *layer = fh->layer;
1307         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1308         int ret;
1309
1310         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1311                 "VIDIOC_DQBUF, layer id = %d\n",
1312                 layer->device_id);
1313
1314         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1315                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1316                 return -EINVAL;
1317         }
1318         /* If this file handle is not allowed to do IO, return error */
1319         if (!fh->io_allowed) {
1320                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1321                 return -EACCES;
1322         }
1323         if (file->f_flags & O_NONBLOCK)
1324                 /* Call videobuf_dqbuf for non blocking mode */
1325                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1326         else
1327                 /* Call videobuf_dqbuf for blocking mode */
1328                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1329
1330         return ret;
1331 }
1332
1333 static int vpbe_display_qbuf(struct file *file, void *priv,
1334                      struct v4l2_buffer *p)
1335 {
1336         struct vpbe_fh *fh = file->private_data;
1337         struct vpbe_layer *layer = fh->layer;
1338         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1339
1340         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1341                 "VIDIOC_QBUF, layer id = %d\n",
1342                 layer->device_id);
1343
1344         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1345                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1346                 return -EINVAL;
1347         }
1348
1349         /* If this file handle is not allowed to do IO, return error */
1350         if (!fh->io_allowed) {
1351                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1352                 return -EACCES;
1353         }
1354
1355         return vb2_qbuf(&layer->buffer_queue, p);
1356 }
1357
1358 static int vpbe_display_querybuf(struct file *file, void *priv,
1359                          struct v4l2_buffer *buf)
1360 {
1361         struct vpbe_fh *fh = file->private_data;
1362         struct vpbe_layer *layer = fh->layer;
1363         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1364
1365         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1366                 "VIDIOC_QUERYBUF, layer id = %d\n",
1367                 layer->device_id);
1368
1369         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1370                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1371                 return -EINVAL;
1372         }
1373         /* Call vb2_querybuf to get information */
1374         return vb2_querybuf(&layer->buffer_queue, buf);
1375 }
1376
1377 static int vpbe_display_reqbufs(struct file *file, void *priv,
1378                         struct v4l2_requestbuffers *req_buf)
1379 {
1380         struct vpbe_fh *fh = file->private_data;
1381         struct vpbe_layer *layer = fh->layer;
1382         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1383         struct vb2_queue *q;
1384         int ret;
1385         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1386
1387         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1388                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1389                 return -EINVAL;
1390         }
1391
1392         /* If io users of the layer is not zero, return error */
1393         if (0 != layer->io_usrs) {
1394                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1395                 return -EBUSY;
1396         }
1397         /* Initialize videobuf queue as per the buffer type */
1398         layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1399         if (IS_ERR(layer->alloc_ctx)) {
1400                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1401                 return PTR_ERR(layer->alloc_ctx);
1402         }
1403         q = &layer->buffer_queue;
1404         memset(q, 0, sizeof(*q));
1405         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1406         q->io_modes = VB2_MMAP | VB2_USERPTR;
1407         q->drv_priv = fh;
1408         q->ops = &video_qops;
1409         q->mem_ops = &vb2_dma_contig_memops;
1410         q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1411         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1412         q->min_buffers_needed = 1;
1413
1414         ret = vb2_queue_init(q);
1415         if (ret) {
1416                 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1417                 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1418                 return ret;
1419         }
1420         /* Set io allowed member of file handle to TRUE */
1421         fh->io_allowed = 1;
1422         /* Increment io usrs member of layer object to 1 */
1423         layer->io_usrs = 1;
1424         /* Store type of memory requested in layer object */
1425         layer->memory = req_buf->memory;
1426         /* Initialize buffer queue */
1427         INIT_LIST_HEAD(&layer->dma_queue);
1428         /* Allocate buffers */
1429         return vb2_reqbufs(q, req_buf);
1430 }
1431
1432 /*
1433  * vpbe_display_mmap()
1434  * It is used to map kernel space buffers into user spaces
1435  */
1436 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1437 {
1438         /* Get the layer object and file handle object */
1439         struct vpbe_fh *fh = filep->private_data;
1440         struct vpbe_layer *layer = fh->layer;
1441         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1442         int ret;
1443
1444         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1445
1446         if (mutex_lock_interruptible(&layer->opslock))
1447                 return -ERESTARTSYS;
1448         ret = vb2_mmap(&layer->buffer_queue, vma);
1449         mutex_unlock(&layer->opslock);
1450         return ret;
1451 }
1452
1453 /* vpbe_display_poll(): It is used for select/poll system call
1454  */
1455 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1456 {
1457         struct vpbe_fh *fh = filep->private_data;
1458         struct vpbe_layer *layer = fh->layer;
1459         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1460         unsigned int err = 0;
1461
1462         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1463         if (layer->started) {
1464                 mutex_lock(&layer->opslock);
1465                 err = vb2_poll(&layer->buffer_queue, filep, wait);
1466                 mutex_unlock(&layer->opslock);
1467         }
1468         return err;
1469 }
1470
1471 /*
1472  * vpbe_display_open()
1473  * It creates object of file handle structure and stores it in private_data
1474  * member of filepointer
1475  */
1476 static int vpbe_display_open(struct file *file)
1477 {
1478         struct vpbe_fh *fh = NULL;
1479         struct vpbe_layer *layer = video_drvdata(file);
1480         struct video_device *vdev = video_devdata(file);
1481         struct vpbe_display *disp_dev = layer->disp_dev;
1482         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1483         struct osd_state *osd_device = disp_dev->osd_device;
1484         int err;
1485
1486         /* Allocate memory for the file handle object */
1487         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1488         if (fh == NULL) {
1489                 v4l2_err(&vpbe_dev->v4l2_dev,
1490                         "unable to allocate memory for file handle object\n");
1491                 return -ENOMEM;
1492         }
1493         v4l2_fh_init(&fh->fh, vdev);
1494         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1495                         "vpbe display open plane = %d\n",
1496                         layer->device_id);
1497
1498         /* store pointer to fh in private_data member of filep */
1499         file->private_data = fh;
1500         fh->layer = layer;
1501         fh->disp_dev = disp_dev;
1502
1503         if (!layer->usrs) {
1504                 if (mutex_lock_interruptible(&layer->opslock))
1505                         return -ERESTARTSYS;
1506                 /* First claim the layer for this device */
1507                 err = osd_device->ops.request_layer(osd_device,
1508                                                 layer->layer_info.id);
1509                 mutex_unlock(&layer->opslock);
1510                 if (err < 0) {
1511                         /* Couldn't get layer */
1512                         v4l2_err(&vpbe_dev->v4l2_dev,
1513                                 "Display Manager failed to allocate layer\n");
1514                         kfree(fh);
1515                         return -EINVAL;
1516                 }
1517         }
1518         /* Increment layer usrs counter */
1519         layer->usrs++;
1520         /* Set io_allowed member to false */
1521         fh->io_allowed = 0;
1522         v4l2_fh_add(&fh->fh);
1523         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1524                         "vpbe display device opened successfully\n");
1525         return 0;
1526 }
1527
1528 /*
1529  * vpbe_display_release()
1530  * This function deletes buffer queue, frees the buffers and the davinci
1531  * display file * handle
1532  */
1533 static int vpbe_display_release(struct file *file)
1534 {
1535         /* Get the layer object and file handle object */
1536         struct vpbe_fh *fh = file->private_data;
1537         struct vpbe_layer *layer = fh->layer;
1538         struct osd_layer_config *cfg  = &layer->layer_info.config;
1539         struct vpbe_display *disp_dev = fh->disp_dev;
1540         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1541         struct osd_state *osd_device = disp_dev->osd_device;
1542
1543         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1544
1545         mutex_lock(&layer->opslock);
1546         /* if this instance is doing IO */
1547         if (fh->io_allowed) {
1548                 /* Reset io_usrs member of layer object */
1549                 layer->io_usrs = 0;
1550
1551                 osd_device->ops.disable_layer(osd_device,
1552                                 layer->layer_info.id);
1553                 layer->started = 0;
1554                 /* Free buffers allocated */
1555                 vb2_queue_release(&layer->buffer_queue);
1556                 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1557         }
1558
1559         /* Decrement layer usrs counter */
1560         layer->usrs--;
1561         /* If this file handle has initialize encoder device, reset it */
1562         if (!layer->usrs) {
1563                 if (cfg->pixfmt == PIXFMT_NV12) {
1564                         struct vpbe_layer *otherlayer;
1565                         otherlayer =
1566                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1567                         osd_device->ops.disable_layer(osd_device,
1568                                         otherlayer->layer_info.id);
1569                         osd_device->ops.release_layer(osd_device,
1570                                         otherlayer->layer_info.id);
1571                 }
1572                 osd_device->ops.disable_layer(osd_device,
1573                                 layer->layer_info.id);
1574                 osd_device->ops.release_layer(osd_device,
1575                                 layer->layer_info.id);
1576         }
1577
1578         v4l2_fh_del(&fh->fh);
1579         v4l2_fh_exit(&fh->fh);
1580         file->private_data = NULL;
1581         mutex_unlock(&layer->opslock);
1582
1583         /* Free memory allocated to file handle object */
1584         kfree(fh);
1585
1586         disp_dev->cbcr_ofst = 0;
1587
1588         return 0;
1589 }
1590
1591 /* vpbe capture ioctl operations */
1592 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1593         .vidioc_querycap         = vpbe_display_querycap,
1594         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1595         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1596         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1597         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1598         .vidioc_reqbufs          = vpbe_display_reqbufs,
1599         .vidioc_querybuf         = vpbe_display_querybuf,
1600         .vidioc_qbuf             = vpbe_display_qbuf,
1601         .vidioc_dqbuf            = vpbe_display_dqbuf,
1602         .vidioc_streamon         = vpbe_display_streamon,
1603         .vidioc_streamoff        = vpbe_display_streamoff,
1604         .vidioc_cropcap          = vpbe_display_cropcap,
1605         .vidioc_g_crop           = vpbe_display_g_crop,
1606         .vidioc_s_crop           = vpbe_display_s_crop,
1607         .vidioc_s_std            = vpbe_display_s_std,
1608         .vidioc_g_std            = vpbe_display_g_std,
1609         .vidioc_enum_output      = vpbe_display_enum_output,
1610         .vidioc_s_output         = vpbe_display_s_output,
1611         .vidioc_g_output         = vpbe_display_g_output,
1612         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1613         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1614         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1615 };
1616
1617 static struct v4l2_file_operations vpbe_fops = {
1618         .owner = THIS_MODULE,
1619         .open = vpbe_display_open,
1620         .release = vpbe_display_release,
1621         .unlocked_ioctl = video_ioctl2,
1622         .mmap = vpbe_display_mmap,
1623         .poll = vpbe_display_poll
1624 };
1625
1626 static int vpbe_device_get(struct device *dev, void *data)
1627 {
1628         struct platform_device *pdev = to_platform_device(dev);
1629         struct vpbe_display *vpbe_disp  = data;
1630
1631         if (strcmp("vpbe_controller", pdev->name) == 0)
1632                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1633
1634         if (strstr(pdev->name, "vpbe-osd") != NULL)
1635                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1636
1637         return 0;
1638 }
1639
1640 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1641                            struct platform_device *pdev)
1642 {
1643         struct vpbe_layer *vpbe_display_layer = NULL;
1644         struct video_device *vbd = NULL;
1645
1646         /* Allocate memory for four plane display objects */
1647
1648         disp_dev->dev[i] =
1649                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1650
1651         /* If memory allocation fails, return error */
1652         if (!disp_dev->dev[i]) {
1653                 printk(KERN_ERR "ran out of memory\n");
1654                 return  -ENOMEM;
1655         }
1656         spin_lock_init(&disp_dev->dev[i]->irqlock);
1657         mutex_init(&disp_dev->dev[i]->opslock);
1658
1659         /* Get the pointer to the layer object */
1660         vpbe_display_layer = disp_dev->dev[i];
1661         vbd = &vpbe_display_layer->video_dev;
1662         /* Initialize field of video device */
1663         vbd->release    = video_device_release_empty;
1664         vbd->fops       = &vpbe_fops;
1665         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1666         vbd->minor      = -1;
1667         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1668         vbd->lock       = &vpbe_display_layer->opslock;
1669         vbd->vfl_dir    = VFL_DIR_TX;
1670
1671         if (disp_dev->vpbe_dev->current_timings.timings_type &
1672                         VPBE_ENC_STD)
1673                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1674
1675         snprintf(vbd->name, sizeof(vbd->name),
1676                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1677                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1678                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1679                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1680
1681         vpbe_display_layer->device_id = i;
1682
1683         vpbe_display_layer->layer_info.id =
1684                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1685
1686
1687         return 0;
1688 }
1689
1690 static int register_device(struct vpbe_layer *vpbe_display_layer,
1691                            struct vpbe_display *disp_dev,
1692                            struct platform_device *pdev)
1693 {
1694         int err;
1695
1696         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1697                   "Trying to register VPBE display device.\n");
1698         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1699                   "layer=%x,layer->video_dev=%x\n",
1700                   (int)vpbe_display_layer,
1701                   (int)&vpbe_display_layer->video_dev);
1702
1703         err = video_register_device(&vpbe_display_layer->video_dev,
1704                                     VFL_TYPE_GRABBER,
1705                                     -1);
1706         if (err)
1707                 return -ENODEV;
1708
1709         vpbe_display_layer->disp_dev = disp_dev;
1710         /* set the driver data in platform device */
1711         platform_set_drvdata(pdev, disp_dev);
1712         video_set_drvdata(&vpbe_display_layer->video_dev,
1713                           vpbe_display_layer);
1714
1715         return 0;
1716 }
1717
1718
1719
1720 /*
1721  * vpbe_display_probe()
1722  * This function creates device entries by register itself to the V4L2 driver
1723  * and initializes fields of each layer objects
1724  */
1725 static int vpbe_display_probe(struct platform_device *pdev)
1726 {
1727         struct vpbe_layer *vpbe_display_layer;
1728         struct vpbe_display *disp_dev;
1729         struct resource *res = NULL;
1730         int k;
1731         int i;
1732         int err;
1733         int irq;
1734
1735         printk(KERN_DEBUG "vpbe_display_probe\n");
1736         /* Allocate memory for vpbe_display */
1737         disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1738                                 GFP_KERNEL);
1739         if (!disp_dev)
1740                 return -ENOMEM;
1741
1742         spin_lock_init(&disp_dev->dma_queue_lock);
1743         /*
1744          * Scan all the platform devices to find the vpbe
1745          * controller device and get the vpbe_dev object
1746          */
1747         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1748                         vpbe_device_get);
1749         if (err < 0)
1750                 return err;
1751         /* Initialize the vpbe display controller */
1752         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1753                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1754                                                          disp_dev->vpbe_dev);
1755                 if (err) {
1756                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1757                                         "Error initing vpbe\n");
1758                         err = -ENOMEM;
1759                         goto probe_out;
1760                 }
1761         }
1762
1763         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1764                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1765                         err = -ENODEV;
1766                         goto probe_out;
1767                 }
1768         }
1769
1770         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1771         if (!res) {
1772                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1773                          "Unable to get VENC interrupt resource\n");
1774                 err = -ENODEV;
1775                 goto probe_out;
1776         }
1777
1778         irq = res->start;
1779         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
1780                                VPBE_DISPLAY_DRIVER, disp_dev);
1781         if (err) {
1782                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1783                                 "Unable to request interrupt\n");
1784                 goto probe_out;
1785         }
1786
1787         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1788                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1789                         err = -ENODEV;
1790                         goto probe_out;
1791                 }
1792         }
1793
1794         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1795         return 0;
1796
1797 probe_out:
1798         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1799                 /* Get the pointer to the layer object */
1800                 vpbe_display_layer = disp_dev->dev[k];
1801                 /* Unregister video device */
1802                 if (vpbe_display_layer) {
1803                         video_unregister_device(
1804                                 &vpbe_display_layer->video_dev);
1805                                 kfree(disp_dev->dev[k]);
1806                 }
1807         }
1808         return err;
1809 }
1810
1811 /*
1812  * vpbe_display_remove()
1813  * It un-register hardware layer from V4L2 driver
1814  */
1815 static int vpbe_display_remove(struct platform_device *pdev)
1816 {
1817         struct vpbe_layer *vpbe_display_layer;
1818         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1819         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1820         int i;
1821
1822         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1823
1824         /* deinitialize the vpbe display controller */
1825         if (NULL != vpbe_dev->ops.deinitialize)
1826                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1827         /* un-register device */
1828         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1829                 /* Get the pointer to the layer object */
1830                 vpbe_display_layer = disp_dev->dev[i];
1831                 /* Unregister video device */
1832                 video_unregister_device(&vpbe_display_layer->video_dev);
1833
1834         }
1835         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1836                 kfree(disp_dev->dev[i]);
1837                 disp_dev->dev[i] = NULL;
1838         }
1839
1840         return 0;
1841 }
1842
1843 static struct platform_driver vpbe_display_driver = {
1844         .driver = {
1845                 .name = VPBE_DISPLAY_DRIVER,
1846                 .owner = THIS_MODULE,
1847                 .bus = &platform_bus_type,
1848         },
1849         .probe = vpbe_display_probe,
1850         .remove = vpbe_display_remove,
1851 };
1852
1853 module_platform_driver(vpbe_display_driver);
1854
1855 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1856 MODULE_LICENSE("GPL");
1857 MODULE_AUTHOR("Texas Instruments");