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 vb2_queue *q = vb->vb2_queue;
 211         struct vpbe_layer *layer = vb2_get_drv_priv(q);
 212         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 213         unsigned long addr;
 214
 215         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 216                                 "vpbe_buffer_prepare\n");
 217
 218         vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
 219         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 220                 return -EINVAL;
 221
 222         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 223         if (!IS_ALIGNED(addr, 8)) {
 224                 v4l2_err(&vpbe_dev->v4l2_dev,
 225                          "buffer_prepare:offset is not aligned to 32 bytes\n");
 226                 return -EINVAL;
 227         }
 228         return 0;
 229 }
 230
 231 /*
 232  * vpbe_buffer_setup()
 233  * This function allocates memory for the buffers
 234  */
 235 static int
 236 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 237                         unsigned int *nbuffers, unsigned int *nplanes,
 238                         unsigned int sizes[], void *alloc_ctxs[])
 239
 240 {
 241         /* Get the file handle object and layer object */
 242         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 243         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 244
 245         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 246
 247         /* Store number of buffers allocated in numbuffer member */
 248         if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
 249                 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
 250
 251         *nplanes = 1;
 252         sizes[0] = layer->pix_fmt.sizeimage;
 253         alloc_ctxs[0] = layer->alloc_ctx;
 254
 255         return 0;
 256 }
 257
 258 /*
 259  * vpbe_buffer_queue()
 260  * This function adds the buffer to DMA queue
 261  */
 262 static void vpbe_buffer_queue(struct vb2_buffer *vb)
 263 {
 264         /* Get the file handle object and layer object */
 265         struct vpbe_disp_buffer *buf = container_of(vb,
 266                                 struct vpbe_disp_buffer, vb);
 267         struct vpbe_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
 268         struct vpbe_display *disp = layer->disp_dev;
 269         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 270         unsigned long flags;
 271
 272         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 273                         "vpbe_buffer_queue\n");
 274
 275         /* add the buffer to the DMA queue */
 276         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 277         list_add_tail(&buf->list, &layer->dma_queue);
 278         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 279 }
 280
 281 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
 282 {
 283         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 284         struct osd_state *osd_device = layer->disp_dev->osd_device;
 285         int ret;
 286
 287          osd_device->ops.disable_layer(osd_device, layer->layer_info.id);
 288
 289         /* Get the next frame from the buffer queue */
 290         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 291                                 struct vpbe_disp_buffer, list);
 292         /* Remove buffer from the buffer queue */
 293         list_del(&layer->cur_frm->list);
 294         /* Mark state of the current frame to active */
 295         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
 296         /* Initialize field_id and started member */
 297         layer->field_id = 0;
 298
 299         /* Set parameters in OSD and VENC */
 300         ret = vpbe_set_osd_display_params(layer->disp_dev, layer);
 301         if (ret < 0) {
 302                 struct vpbe_disp_buffer *buf, *tmp;
 303
 304                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_QUEUED);
 305                 list_for_each_entry_safe(buf, tmp, &layer->dma_queue, list) {
 306                         list_del(&buf->list);
 307                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 308                 }
 309
 310                 return ret;
 311         }
 312
 313         /*
 314          * if request format is yuv420 semiplanar, need to
 315          * enable both video windows
 316          */
 317         layer->started = 1;
 318         layer->layer_first_int = 1;
 319
 320         return ret;
 321 }
 322
 323 static void vpbe_stop_streaming(struct vb2_queue *vq)
 324 {
 325         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 326         struct osd_state *osd_device = layer->disp_dev->osd_device;
 327         struct vpbe_display *disp = layer->disp_dev;
 328         unsigned long flags;
 329
 330         if (!vb2_is_streaming(vq))
 331                 return;
 332
 333         osd_device->ops.disable_layer(osd_device, layer->layer_info.id);
 334
 335         /* release all active buffers */
 336         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 337         if (layer->cur_frm == layer->next_frm) {
 338                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_ERROR);
 339         } else {
 340                 if (layer->cur_frm != NULL)
 341                         vb2_buffer_done(&layer->cur_frm->vb,
 342                                         VB2_BUF_STATE_ERROR);
 343                 if (layer->next_frm != NULL)
 344                         vb2_buffer_done(&layer->next_frm->vb,
 345                                         VB2_BUF_STATE_ERROR);
 346         }
 347
 348         while (!list_empty(&layer->dma_queue)) {
 349                 layer->next_frm = list_entry(layer->dma_queue.next,
 350                                                 struct vpbe_disp_buffer, list);
 351                 list_del(&layer->next_frm->list);
 352                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
 353         }
 354         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 355 }
 356
 357 static struct vb2_ops video_qops = {
 358         .queue_setup = vpbe_buffer_queue_setup,
 359         .wait_prepare = vb2_ops_wait_prepare,
 360         .wait_finish = vb2_ops_wait_finish,
 361         .buf_prepare = vpbe_buffer_prepare,
 362         .start_streaming = vpbe_start_streaming,
 363         .stop_streaming = vpbe_stop_streaming,
 364         .buf_queue = vpbe_buffer_queue,
 365 };
 366
 367 static
 368 struct vpbe_layer*
 369 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 370                         struct vpbe_layer *layer)
 371 {
 372         enum vpbe_display_device_id thiswin, otherwin;
 373         thiswin = layer->device_id;
 374
 375         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 376         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 377         return disp_dev->dev[otherwin];
 378 }
 379
 380 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 381                         struct vpbe_layer *layer)
 382 {
 383         struct osd_layer_config *cfg  = &layer->layer_info.config;
 384         struct osd_state *osd_device = disp_dev->osd_device;
 385         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 386         unsigned long addr;
 387         int ret;
 388
 389         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
 390         /* Set address in the display registers */
 391         osd_device->ops.start_layer(osd_device,
 392                                     layer->layer_info.id,
 393                                     addr,
 394                                     disp_dev->cbcr_ofst);
 395
 396         ret = osd_device->ops.enable_layer(osd_device,
 397                                 layer->layer_info.id, 0);
 398         if (ret < 0) {
 399                 v4l2_err(&vpbe_dev->v4l2_dev,
 400                         "Error in enabling osd window layer 0\n");
 401                 return -1;
 402         }
 403
 404         /* Enable the window */
 405         layer->layer_info.enable = 1;
 406         if (cfg->pixfmt == PIXFMT_NV12) {
 407                 struct vpbe_layer *otherlayer =
 408                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 409
 410                 ret = osd_device->ops.enable_layer(osd_device,
 411                                 otherlayer->layer_info.id, 1);
 412                 if (ret < 0) {
 413                         v4l2_err(&vpbe_dev->v4l2_dev,
 414                                 "Error in enabling osd window layer 1\n");
 415                         return -1;
 416                 }
 417                 otherlayer->layer_info.enable = 1;
 418         }
 419         return 0;
 420 }
 421
 422 static void
 423 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 424                         struct vpbe_layer *layer,
 425                         int expected_xsize, int expected_ysize)
 426 {
 427         struct display_layer_info *layer_info = &layer->layer_info;
 428         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 429         struct osd_layer_config *cfg  = &layer->layer_info.config;
 430         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 431         int calculated_xsize;
 432         int h_exp = 0;
 433         int v_exp = 0;
 434         int h_scale;
 435         int v_scale;
 436
 437         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 438
 439         /*
 440          * Application initially set the image format. Current display
 441          * size is obtained from the vpbe display controller. expected_xsize
 442          * and expected_ysize are set through S_CROP ioctl. Based on this,
 443          * driver will calculate the scale factors for vertical and
 444          * horizontal direction so that the image is displayed scaled
 445          * and expanded. Application uses expansion to display the image
 446          * in a square pixel. Otherwise it is displayed using displays
 447          * pixel aspect ratio.It is expected that application chooses
 448          * the crop coordinates for cropped or scaled display. if crop
 449          * size is less than the image size, it is displayed cropped or
 450          * it is displayed scaled and/or expanded.
 451          *
 452          * to begin with, set the crop window same as expected. Later we
 453          * will override with scaled window size
 454          */
 455
 456         cfg->xsize = pixfmt->width;
 457         cfg->ysize = pixfmt->height;
 458         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 459         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 460         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 461         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 462
 463         if (pixfmt->width < expected_xsize) {
 464                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 465                 if (h_scale < 2)
 466                         h_scale = 1;
 467                 else if (h_scale >= 4)
 468                         h_scale = 4;
 469                 else
 470                         h_scale = 2;
 471                 cfg->xsize *= h_scale;
 472                 if (cfg->xsize < expected_xsize) {
 473                         if ((standard_id & V4L2_STD_525_60) ||
 474                         (standard_id & V4L2_STD_625_50)) {
 475                                 calculated_xsize = (cfg->xsize *
 476                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 477                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 478                                 if (calculated_xsize <= expected_xsize) {
 479                                         h_exp = 1;
 480                                         cfg->xsize = calculated_xsize;
 481                                 }
 482                         }
 483                 }
 484                 if (h_scale == 2)
 485                         layer_info->h_zoom = ZOOM_X2;
 486                 else if (h_scale == 4)
 487                         layer_info->h_zoom = ZOOM_X4;
 488                 if (h_exp)
 489                         layer_info->h_exp = H_EXP_9_OVER_8;
 490         } else {
 491                 /* no scaling, only cropping. Set display area to crop area */
 492                 cfg->xsize = expected_xsize;
 493         }
 494
 495         if (pixfmt->height < expected_ysize) {
 496                 v_scale = expected_ysize / pixfmt->height;
 497                 if (v_scale < 2)
 498                         v_scale = 1;
 499                 else if (v_scale >= 4)
 500                         v_scale = 4;
 501                 else
 502                         v_scale = 2;
 503                 cfg->ysize *= v_scale;
 504                 if (cfg->ysize < expected_ysize) {
 505                         if ((standard_id & V4L2_STD_625_50)) {
 506                                 calculated_xsize = (cfg->ysize *
 507                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 508                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 509                                 if (calculated_xsize <= expected_ysize) {
 510                                         v_exp = 1;
 511                                         cfg->ysize = calculated_xsize;
 512                                 }
 513                         }
 514                 }
 515                 if (v_scale == 2)
 516                         layer_info->v_zoom = ZOOM_X2;
 517                 else if (v_scale == 4)
 518                         layer_info->v_zoom = ZOOM_X4;
 519                 if (v_exp)
 520                         layer_info->h_exp = V_EXP_6_OVER_5;
 521         } else {
 522                 /* no scaling, only cropping. Set display area to crop area */
 523                 cfg->ysize = expected_ysize;
 524         }
 525         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 526                 "crop display xsize = %d, ysize = %d\n",
 527                 cfg->xsize, cfg->ysize);
 528 }
 529
 530 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 531                         struct vpbe_layer *layer,
 532                         int top, int left)
 533 {
 534         struct osd_layer_config *cfg = &layer->layer_info.config;
 535         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 536
 537         cfg->xpos = min((unsigned int)left,
 538                         vpbe_dev->current_timings.xres - cfg->xsize);
 539         cfg->ypos = min((unsigned int)top,
 540                         vpbe_dev->current_timings.yres - cfg->ysize);
 541
 542         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 543                 "new xpos = %d, ypos = %d\n",
 544                 cfg->xpos, cfg->ypos);
 545 }
 546
 547 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 548                         struct v4l2_rect *c)
 549 {
 550         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 551
 552         if ((c->width == 0) ||
 553           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 554                 c->width = vpbe_dev->current_timings.xres - c->left;
 555
 556         if ((c->height == 0) || ((c->height + c->top) >
 557           vpbe_dev->current_timings.yres))
 558                 c->height = vpbe_dev->current_timings.yres - c->top;
 559
 560         /* window height must be even for interlaced display */
 561         if (vpbe_dev->current_timings.interlaced)
 562                 c->height &= (~0x01);
 563
 564 }
 565
 566 /**
 567  * vpbe_try_format()
 568  * If user application provides width and height, and have bytesperline set
 569  * to zero, driver calculates bytesperline and sizeimage based on hardware
 570  * limits.
 571  */
 572 static int vpbe_try_format(struct vpbe_display *disp_dev,
 573                         struct v4l2_pix_format *pixfmt, int check)
 574 {
 575         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 576         int min_height = 1;
 577         int min_width = 32;
 578         int max_height;
 579         int max_width;
 580         int bpp;
 581
 582         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 583             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 584                 /* choose default as V4L2_PIX_FMT_UYVY */
 585                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 586
 587         /* Check the field format */
 588         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 589                 (pixfmt->field != V4L2_FIELD_NONE)) {
 590                 if (vpbe_dev->current_timings.interlaced)
 591                         pixfmt->field = V4L2_FIELD_INTERLACED;
 592                 else
 593                         pixfmt->field = V4L2_FIELD_NONE;
 594         }
 595
 596         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 597                 min_height = 2;
 598
 599         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 600                 bpp = 1;
 601         else
 602                 bpp = 2;
 603
 604         max_width = vpbe_dev->current_timings.xres;
 605         max_height = vpbe_dev->current_timings.yres;
 606
 607         min_width /= bpp;
 608
 609         if (!pixfmt->width || (pixfmt->width < min_width) ||
 610                 (pixfmt->width > max_width)) {
 611                 pixfmt->width = vpbe_dev->current_timings.xres;
 612         }
 613
 614         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 615                 (pixfmt->height  > max_height)) {
 616                 pixfmt->height = vpbe_dev->current_timings.yres;
 617         }
 618
 619         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 620                 pixfmt->bytesperline = pixfmt->width * bpp;
 621
 622         /* Make the bytesperline 32 byte aligned */
 623         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 624
 625         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 626                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 627                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 628         else
 629                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 630
 631         return 0;
 632 }
 633
 634 static int vpbe_display_querycap(struct file *file, void  *priv,
 635                                struct v4l2_capability *cap)
 636 {
 637         struct vpbe_layer *layer = video_drvdata(file);
 638         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 639
 640         cap->version = VPBE_DISPLAY_VERSION_CODE;
 641         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 642         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 643         snprintf(cap->driver, sizeof(cap->driver), "%s",
 644                 dev_name(vpbe_dev->pdev));
 645         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 646                  dev_name(vpbe_dev->pdev));
 647         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 648
 649         return 0;
 650 }
 651
 652 static int vpbe_display_s_crop(struct file *file, void *priv,
 653                              const struct v4l2_crop *crop)
 654 {
 655         struct vpbe_layer *layer = video_drvdata(file);
 656         struct vpbe_display *disp_dev = layer->disp_dev;
 657         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 658         struct osd_layer_config *cfg = &layer->layer_info.config;
 659         struct osd_state *osd_device = disp_dev->osd_device;
 660         struct v4l2_rect rect = crop->c;
 661         int ret;
 662
 663         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 664                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
 665
 666         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 667                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 668                 return -EINVAL;
 669         }
 670
 671         if (rect.top < 0)
 672                 rect.top = 0;
 673         if (rect.left < 0)
 674                 rect.left = 0;
 675
 676         vpbe_disp_check_window_params(disp_dev, &rect);
 677
 678         osd_device->ops.get_layer_config(osd_device,
 679                         layer->layer_info.id, cfg);
 680
 681         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 682                                         rect.width,
 683                                         rect.height);
 684         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 685                                         rect.left);
 686         ret = osd_device->ops.set_layer_config(osd_device,
 687                                 layer->layer_info.id, cfg);
 688         if (ret < 0) {
 689                 v4l2_err(&vpbe_dev->v4l2_dev,
 690                         "Error in set layer config:\n");
 691                 return -EINVAL;
 692         }
 693
 694         /* apply zooming and h or v expansion */
 695         osd_device->ops.set_zoom(osd_device,
 696                         layer->layer_info.id,
 697                         layer->layer_info.h_zoom,
 698                         layer->layer_info.v_zoom);
 699         ret = osd_device->ops.set_vid_expansion(osd_device,
 700                         layer->layer_info.h_exp,
 701                         layer->layer_info.v_exp);
 702         if (ret < 0) {
 703                 v4l2_err(&vpbe_dev->v4l2_dev,
 704                 "Error in set vid expansion:\n");
 705                 return -EINVAL;
 706         }
 707
 708         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 709                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 710                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 711                 (layer->layer_info.v_exp != V_EXP_OFF))
 712                 /* Enable expansion filter */
 713                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 714         else
 715                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 716
 717         return 0;
 718 }
 719
 720 static int vpbe_display_g_crop(struct file *file, void *priv,
 721                              struct v4l2_crop *crop)
 722 {
 723         struct vpbe_layer *layer = video_drvdata(file);
 724         struct osd_layer_config *cfg = &layer->layer_info.config;
 725         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 726         struct osd_state *osd_device = layer->disp_dev->osd_device;
 727         struct v4l2_rect *rect = &crop->c;
 728
 729         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 730                         "VIDIOC_G_CROP, layer id = %d\n",
 731                         layer->device_id);
 732
 733         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 734                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
 735                 return -EINVAL;
 736         }
 737         osd_device->ops.get_layer_config(osd_device,
 738                                 layer->layer_info.id, cfg);
 739         rect->top = cfg->ypos;
 740         rect->left = cfg->xpos;
 741         rect->width = cfg->xsize;
 742         rect->height = cfg->ysize;
 743
 744         return 0;
 745 }
 746
 747 static int vpbe_display_cropcap(struct file *file, void *priv,
 748                               struct v4l2_cropcap *cropcap)
 749 {
 750         struct vpbe_layer *layer = video_drvdata(file);
 751         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 752
 753         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 754
 755         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 756         cropcap->bounds.left = 0;
 757         cropcap->bounds.top = 0;
 758         cropcap->bounds.width = vpbe_dev->current_timings.xres;
 759         cropcap->bounds.height = vpbe_dev->current_timings.yres;
 760         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
 761         cropcap->defrect = cropcap->bounds;
 762         return 0;
 763 }
 764
 765 static int vpbe_display_g_fmt(struct file *file, void *priv,
 766                                 struct v4l2_format *fmt)
 767 {
 768         struct vpbe_layer *layer = video_drvdata(file);
 769         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 770
 771         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 772                         "VIDIOC_G_FMT, layer id = %d\n",
 773                         layer->device_id);
 774
 775         /* If buffer type is video output */
 776         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 777                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 778                 return -EINVAL;
 779         }
 780         /* Fill in the information about format */
 781         fmt->fmt.pix = layer->pix_fmt;
 782
 783         return 0;
 784 }
 785
 786 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 787                                    struct v4l2_fmtdesc *fmt)
 788 {
 789         struct vpbe_layer *layer = video_drvdata(file);
 790         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 791         unsigned int index = 0;
 792
 793         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 794                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 795                                 layer->device_id);
 796         if (fmt->index > 1) {
 797                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 798                 return -EINVAL;
 799         }
 800
 801         /* Fill in the information about format */
 802         index = fmt->index;
 803         memset(fmt, 0, sizeof(*fmt));
 804         fmt->index = index;
 805         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 806         if (index == 0) {
 807                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
 808                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 809         } else {
 810                 strcpy(fmt->description, "Y/CbCr 4:2:0");
 811                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 812         }
 813
 814         return 0;
 815 }
 816
 817 static int vpbe_display_s_fmt(struct file *file, void *priv,
 818                                 struct v4l2_format *fmt)
 819 {
 820         struct vpbe_layer *layer = video_drvdata(file);
 821         struct vpbe_display *disp_dev = layer->disp_dev;
 822         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 823         struct osd_layer_config *cfg  = &layer->layer_info.config;
 824         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 825         struct osd_state *osd_device = disp_dev->osd_device;
 826         int ret;
 827
 828         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 829                         "VIDIOC_S_FMT, layer id = %d\n",
 830                         layer->device_id);
 831
 832         /* If streaming is started, return error */
 833         if (layer->started) {
 834                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 835                 return -EBUSY;
 836         }
 837         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 838                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 839                 return -EINVAL;
 840         }
 841         /* Check for valid pixel format */
 842         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 843         if (ret)
 844                 return ret;
 845
 846         /* YUV420 is requested, check availability of the
 847         other video window */
 848
 849         layer->pix_fmt = *pixfmt;
 850         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
 851                 struct vpbe_layer *otherlayer;
 852
 853                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
 854                 /* if other layer is available, only
 855                  * claim it, do not configure it
 856                  */
 857                 ret = osd_device->ops.request_layer(osd_device,
 858                                                     otherlayer->layer_info.id);
 859                 if (ret < 0) {
 860                         v4l2_err(&vpbe_dev->v4l2_dev,
 861                                  "Display Manager failed to allocate layer\n");
 862                         return -EBUSY;
 863                 }
 864         }
 865
 866         /* Get osd layer config */
 867         osd_device->ops.get_layer_config(osd_device,
 868                         layer->layer_info.id, cfg);
 869         /* Store the pixel format in the layer object */
 870         cfg->xsize = pixfmt->width;
 871         cfg->ysize = pixfmt->height;
 872         cfg->line_length = pixfmt->bytesperline;
 873         cfg->ypos = 0;
 874         cfg->xpos = 0;
 875         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 876
 877         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 878                 cfg->pixfmt = PIXFMT_YCBCRI;
 879
 880         /* Change of the default pixel format for both video windows */
 881         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 882                 struct vpbe_layer *otherlayer;
 883                 cfg->pixfmt = PIXFMT_NV12;
 884                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 885                                                                 layer);
 886                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 887         }
 888
 889         /* Set the layer config in the osd window */
 890         ret = osd_device->ops.set_layer_config(osd_device,
 891                                 layer->layer_info.id, cfg);
 892         if (ret < 0) {
 893                 v4l2_err(&vpbe_dev->v4l2_dev,
 894                                 "Error in S_FMT params:\n");
 895                 return -EINVAL;
 896         }
 897
 898         /* Readback and fill the local copy of current pix format */
 899         osd_device->ops.get_layer_config(osd_device,
 900                         layer->layer_info.id, cfg);
 901
 902         return 0;
 903 }
 904
 905 static int vpbe_display_try_fmt(struct file *file, void *priv,
 906                                   struct v4l2_format *fmt)
 907 {
 908         struct vpbe_layer *layer = video_drvdata(file);
 909         struct vpbe_display *disp_dev = layer->disp_dev;
 910         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 911         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 912
 913         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 914
 915         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 916                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 917                 return -EINVAL;
 918         }
 919
 920         /* Check for valid field format */
 921         return  vpbe_try_format(disp_dev, pixfmt, 0);
 922
 923 }
 924
 925 /**
 926  * vpbe_display_s_std - Set the given standard in the encoder
 927  *
 928  * Sets the standard if supported by the current encoder. Return the status.
 929  * 0 - success & -EINVAL on error
 930  */
 931 static int vpbe_display_s_std(struct file *file, void *priv,
 932                                 v4l2_std_id std_id)
 933 {
 934         struct vpbe_layer *layer = video_drvdata(file);
 935         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 936         int ret;
 937
 938         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
 939
 940         /* If streaming is started, return error */
 941         if (layer->started) {
 942                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
 943                 return -EBUSY;
 944         }
 945         if (NULL != vpbe_dev->ops.s_std) {
 946                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
 947                 if (ret) {
 948                         v4l2_err(&vpbe_dev->v4l2_dev,
 949                         "Failed to set standard for sub devices\n");
 950                         return -EINVAL;
 951                 }
 952         } else {
 953                 return -EINVAL;
 954         }
 955
 956         return 0;
 957 }
 958
 959 /**
 960  * vpbe_display_g_std - Get the standard in the current encoder
 961  *
 962  * Get the standard in the current encoder. Return the status. 0 - success
 963  * -EINVAL on error
 964  */
 965 static int vpbe_display_g_std(struct file *file, void *priv,
 966                                 v4l2_std_id *std_id)
 967 {
 968         struct vpbe_layer *layer = video_drvdata(file);
 969         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 970
 971         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
 972
 973         /* Get the standard from the current encoder */
 974         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
 975                 *std_id = vpbe_dev->current_timings.std_id;
 976                 return 0;
 977         }
 978
 979         return -EINVAL;
 980 }
 981
 982 /**
 983  * vpbe_display_enum_output - enumerate outputs
 984  *
 985  * Enumerates the outputs available at the vpbe display
 986  * returns the status, -EINVAL if end of output list
 987  */
 988 static int vpbe_display_enum_output(struct file *file, void *priv,
 989                                     struct v4l2_output *output)
 990 {
 991         struct vpbe_layer *layer = video_drvdata(file);
 992         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 993         int ret;
 994
 995         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
 996
 997         /* Enumerate outputs */
 998
 999         if (NULL == vpbe_dev->ops.enum_outputs)
1000                 return -EINVAL;
1001
1002         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1003         if (ret) {
1004                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1005                         "Failed to enumerate outputs\n");
1006                 return -EINVAL;
1007         }
1008
1009         return 0;
1010 }
1011
1012 /**
1013  * vpbe_display_s_output - Set output to
1014  * the output specified by the index
1015  */
1016 static int vpbe_display_s_output(struct file *file, void *priv,
1017                                 unsigned int i)
1018 {
1019         struct vpbe_layer *layer = video_drvdata(file);
1020         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1021         int ret;
1022
1023         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1024         /* If streaming is started, return error */
1025         if (layer->started) {
1026                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1027                 return -EBUSY;
1028         }
1029         if (NULL == vpbe_dev->ops.set_output)
1030                 return -EINVAL;
1031
1032         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1033         if (ret) {
1034                 v4l2_err(&vpbe_dev->v4l2_dev,
1035                         "Failed to set output for sub devices\n");
1036                 return -EINVAL;
1037         }
1038
1039         return 0;
1040 }
1041
1042 /**
1043  * vpbe_display_g_output - Get output from subdevice
1044  * for a given by the index
1045  */
1046 static int vpbe_display_g_output(struct file *file, void *priv,
1047                                 unsigned int *i)
1048 {
1049         struct vpbe_layer *layer = video_drvdata(file);
1050         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1051
1052         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1053         /* Get the standard from the current encoder */
1054         *i = vpbe_dev->current_out_index;
1055
1056         return 0;
1057 }
1058
1059 /**
1060  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1061  *
1062  * enum the timings in the current encoder. Return the status. 0 - success
1063  * -EINVAL on error
1064  */
1065 static int
1066 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1067                         struct v4l2_enum_dv_timings *timings)
1068 {
1069         struct vpbe_layer *layer = video_drvdata(file);
1070         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1071         int ret;
1072
1073         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1074
1075         /* Enumerate outputs */
1076         if (NULL == vpbe_dev->ops.enum_dv_timings)
1077                 return -EINVAL;
1078
1079         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1080         if (ret) {
1081                 v4l2_err(&vpbe_dev->v4l2_dev,
1082                         "Failed to enumerate dv timings info\n");
1083                 return -EINVAL;
1084         }
1085
1086         return 0;
1087 }
1088
1089 /**
1090  * vpbe_display_s_dv_timings - Set the dv timings
1091  *
1092  * Set the timings in the current encoder. Return the status. 0 - success
1093  * -EINVAL on error
1094  */
1095 static int
1096 vpbe_display_s_dv_timings(struct file *file, void *priv,
1097                                 struct v4l2_dv_timings *timings)
1098 {
1099         struct vpbe_layer *layer = video_drvdata(file);
1100         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1101         int ret;
1102
1103         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1104
1105
1106         /* If streaming is started, return error */
1107         if (layer->started) {
1108                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1109                 return -EBUSY;
1110         }
1111
1112         /* Set the given standard in the encoder */
1113         if (!vpbe_dev->ops.s_dv_timings)
1114                 return -EINVAL;
1115
1116         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1117         if (ret) {
1118                 v4l2_err(&vpbe_dev->v4l2_dev,
1119                         "Failed to set the dv timings info\n");
1120                 return -EINVAL;
1121         }
1122
1123         return 0;
1124 }
1125
1126 /**
1127  * vpbe_display_g_dv_timings - Set the dv timings
1128  *
1129  * Get the timings in the current encoder. Return the status. 0 - success
1130  * -EINVAL on error
1131  */
1132 static int
1133 vpbe_display_g_dv_timings(struct file *file, void *priv,
1134                                 struct v4l2_dv_timings *dv_timings)
1135 {
1136         struct vpbe_layer *layer = video_drvdata(file);
1137         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1138
1139         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1140
1141         /* Get the given standard in the encoder */
1142
1143         if (vpbe_dev->current_timings.timings_type &
1144                                 VPBE_ENC_DV_TIMINGS) {
1145                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1146         } else {
1147                 return -EINVAL;
1148         }
1149
1150         return 0;
1151 }
1152
1153 /*
1154  * vpbe_display_open()
1155  * It creates object of file handle structure and stores it in private_data
1156  * member of filepointer
1157  */
1158 static int vpbe_display_open(struct file *file)
1159 {
1160         struct vpbe_layer *layer = video_drvdata(file);
1161         struct vpbe_display *disp_dev = layer->disp_dev;
1162         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1163         struct osd_state *osd_device = disp_dev->osd_device;
1164         int err;
1165
1166         /* creating context for file descriptor */
1167         err = v4l2_fh_open(file);
1168         if (err) {
1169                 v4l2_err(&vpbe_dev->v4l2_dev, "v4l2_fh_open failed\n");
1170                 return err;
1171         }
1172
1173         /* leaving if layer is already initialized */
1174         if (!v4l2_fh_is_singular_file(file))
1175                 return err;
1176
1177         if (!layer->usrs) {
1178                 if (mutex_lock_interruptible(&layer->opslock))
1179                         return -ERESTARTSYS;
1180                 /* First claim the layer for this device */
1181                 err = osd_device->ops.request_layer(osd_device,
1182                                                 layer->layer_info.id);
1183                 mutex_unlock(&layer->opslock);
1184                 if (err < 0) {
1185                         /* Couldn't get layer */
1186                         v4l2_err(&vpbe_dev->v4l2_dev,
1187                                 "Display Manager failed to allocate layer\n");
1188                         v4l2_fh_release(file);
1189                         return -EINVAL;
1190                 }
1191         }
1192         /* Increment layer usrs counter */
1193         layer->usrs++;
1194         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1195                         "vpbe display device opened successfully\n");
1196         return 0;
1197 }
1198
1199 /*
1200  * vpbe_display_release()
1201  * This function deletes buffer queue, frees the buffers and the davinci
1202  * display file * handle
1203  */
1204 static int vpbe_display_release(struct file *file)
1205 {
1206         struct vpbe_layer *layer = video_drvdata(file);
1207         struct osd_layer_config *cfg  = &layer->layer_info.config;
1208         struct vpbe_display *disp_dev = layer->disp_dev;
1209         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1210         struct osd_state *osd_device = disp_dev->osd_device;
1211
1212         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1213
1214         mutex_lock(&layer->opslock);
1215         /* Reset io_usrs member of layer object */
1216         layer->io_usrs = 0;
1217
1218         osd_device->ops.disable_layer(osd_device,
1219                         layer->layer_info.id);
1220         layer->started = 0;
1221
1222         /* Decrement layer usrs counter */
1223         layer->usrs--;
1224         /* If this file handle has initialize encoder device, reset it */
1225         if (!layer->usrs) {
1226                 if (cfg->pixfmt == PIXFMT_NV12) {
1227                         struct vpbe_layer *otherlayer;
1228                         otherlayer =
1229                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1230                         osd_device->ops.disable_layer(osd_device,
1231                                         otherlayer->layer_info.id);
1232                         osd_device->ops.release_layer(osd_device,
1233                                         otherlayer->layer_info.id);
1234                 }
1235                 osd_device->ops.disable_layer(osd_device,
1236                                 layer->layer_info.id);
1237                 osd_device->ops.release_layer(osd_device,
1238                                 layer->layer_info.id);
1239         }
1240
1241         _vb2_fop_release(file, NULL);
1242         mutex_unlock(&layer->opslock);
1243
1244         disp_dev->cbcr_ofst = 0;
1245
1246         return 0;
1247 }
1248
1249 /* vpbe capture ioctl operations */
1250 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1251         .vidioc_querycap         = vpbe_display_querycap,
1252         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1253         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1254         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1255         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1256
1257         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
1258         .vidioc_querybuf         = vb2_ioctl_querybuf,
1259         .vidioc_qbuf             = vb2_ioctl_qbuf,
1260         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
1261         .vidioc_streamon         = vb2_ioctl_streamon,
1262         .vidioc_streamoff        = vb2_ioctl_streamoff,
1263
1264         .vidioc_cropcap          = vpbe_display_cropcap,
1265         .vidioc_g_crop           = vpbe_display_g_crop,
1266         .vidioc_s_crop           = vpbe_display_s_crop,
1267         .vidioc_s_std            = vpbe_display_s_std,
1268         .vidioc_g_std            = vpbe_display_g_std,
1269         .vidioc_enum_output      = vpbe_display_enum_output,
1270         .vidioc_s_output         = vpbe_display_s_output,
1271         .vidioc_g_output         = vpbe_display_g_output,
1272         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1273         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1274         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1275 };
1276
1277 static struct v4l2_file_operations vpbe_fops = {
1278         .owner = THIS_MODULE,
1279         .open = vpbe_display_open,
1280         .release = vpbe_display_release,
1281         .unlocked_ioctl = video_ioctl2,
1282         .mmap = vb2_fop_mmap,
1283         .poll =  vb2_fop_poll,
1284 };
1285
1286 static int vpbe_device_get(struct device *dev, void *data)
1287 {
1288         struct platform_device *pdev = to_platform_device(dev);
1289         struct vpbe_display *vpbe_disp  = data;
1290
1291         if (strcmp("vpbe_controller", pdev->name) == 0)
1292                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1293
1294         if (strstr(pdev->name, "vpbe-osd") != NULL)
1295                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1296
1297         return 0;
1298 }
1299
1300 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1301                            struct platform_device *pdev)
1302 {
1303         struct vpbe_layer *vpbe_display_layer = NULL;
1304         struct video_device *vbd = NULL;
1305
1306         /* Allocate memory for four plane display objects */
1307
1308         disp_dev->dev[i] =
1309                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1310
1311         /* If memory allocation fails, return error */
1312         if (!disp_dev->dev[i]) {
1313                 printk(KERN_ERR "ran out of memory\n");
1314                 return  -ENOMEM;
1315         }
1316         spin_lock_init(&disp_dev->dev[i]->irqlock);
1317         mutex_init(&disp_dev->dev[i]->opslock);
1318
1319         /* Get the pointer to the layer object */
1320         vpbe_display_layer = disp_dev->dev[i];
1321         vbd = &vpbe_display_layer->video_dev;
1322         /* Initialize field of video device */
1323         vbd->release    = video_device_release_empty;
1324         vbd->fops       = &vpbe_fops;
1325         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1326         vbd->minor      = -1;
1327         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1328         vbd->lock       = &vpbe_display_layer->opslock;
1329         vbd->vfl_dir    = VFL_DIR_TX;
1330
1331         if (disp_dev->vpbe_dev->current_timings.timings_type &
1332                         VPBE_ENC_STD)
1333                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1334
1335         snprintf(vbd->name, sizeof(vbd->name),
1336                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1337                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1338                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1339                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1340
1341         vpbe_display_layer->device_id = i;
1342
1343         vpbe_display_layer->layer_info.id =
1344                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1345
1346
1347         return 0;
1348 }
1349
1350 static int register_device(struct vpbe_layer *vpbe_display_layer,
1351                            struct vpbe_display *disp_dev,
1352                            struct platform_device *pdev)
1353 {
1354         int err;
1355
1356         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1357                   "Trying to register VPBE display device.\n");
1358         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1359                   "layer=%x,layer->video_dev=%x\n",
1360                   (int)vpbe_display_layer,
1361                   (int)&vpbe_display_layer->video_dev);
1362
1363         vpbe_display_layer->video_dev.queue = &vpbe_display_layer->buffer_queue;
1364         err = video_register_device(&vpbe_display_layer->video_dev,
1365                                     VFL_TYPE_GRABBER,
1366                                     -1);
1367         if (err)
1368                 return -ENODEV;
1369
1370         vpbe_display_layer->disp_dev = disp_dev;
1371         /* set the driver data in platform device */
1372         platform_set_drvdata(pdev, disp_dev);
1373         video_set_drvdata(&vpbe_display_layer->video_dev,
1374                           vpbe_display_layer);
1375
1376         return 0;
1377 }
1378
1379
1380
1381 /*
1382  * vpbe_display_probe()
1383  * This function creates device entries by register itself to the V4L2 driver
1384  * and initializes fields of each layer objects
1385  */
1386 static int vpbe_display_probe(struct platform_device *pdev)
1387 {
1388         struct vpbe_display *disp_dev;
1389         struct v4l2_device *v4l2_dev;
1390         struct resource *res = NULL;
1391         struct vb2_queue *q;
1392         int k;
1393         int i;
1394         int err;
1395         int irq;
1396
1397         printk(KERN_DEBUG "vpbe_display_probe\n");
1398         /* Allocate memory for vpbe_display */
1399         disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1400                                 GFP_KERNEL);
1401         if (!disp_dev)
1402                 return -ENOMEM;
1403
1404         spin_lock_init(&disp_dev->dma_queue_lock);
1405         /*
1406          * Scan all the platform devices to find the vpbe
1407          * controller device and get the vpbe_dev object
1408          */
1409         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1410                         vpbe_device_get);
1411         if (err < 0)
1412                 return err;
1413
1414         v4l2_dev = &disp_dev->vpbe_dev->v4l2_dev;
1415         /* Initialize the vpbe display controller */
1416         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1417                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1418                                                          disp_dev->vpbe_dev);
1419                 if (err) {
1420                         v4l2_err(v4l2_dev, "Error initing vpbe\n");
1421                         err = -ENOMEM;
1422                         goto probe_out;
1423                 }
1424         }
1425
1426         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1427                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1428                         err = -ENODEV;
1429                         goto probe_out;
1430                 }
1431         }
1432
1433         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1434         if (!res) {
1435                 v4l2_err(v4l2_dev, "Unable to get VENC interrupt resource\n");
1436                 err = -ENODEV;
1437                 goto probe_out;
1438         }
1439
1440         irq = res->start;
1441         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
1442                                VPBE_DISPLAY_DRIVER, disp_dev);
1443         if (err) {
1444                 v4l2_err(v4l2_dev, "VPBE IRQ request failed\n");
1445                 goto probe_out;
1446         }
1447
1448         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1449                 /* initialize vb2 queue */
1450                 q = &disp_dev->dev[i]->buffer_queue;
1451                 memset(q, 0, sizeof(*q));
1452                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1453                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1454                 q->drv_priv = disp_dev->dev[i];
1455                 q->ops = &video_qops;
1456                 q->mem_ops = &vb2_dma_contig_memops;
1457                 q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1458                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1459                 q->min_buffers_needed = 1;
1460                 q->lock = &disp_dev->dev[i]->opslock;
1461                 err = vb2_queue_init(q);
1462                 if (err) {
1463                         v4l2_err(v4l2_dev, "vb2_queue_init() failed\n");
1464                         goto probe_out;
1465                 }
1466
1467                 disp_dev->dev[i]->alloc_ctx =
1468                         vb2_dma_contig_init_ctx(disp_dev->vpbe_dev->pdev);
1469                 if (IS_ERR(disp_dev->dev[i]->alloc_ctx)) {
1470                         v4l2_err(v4l2_dev, "Failed to get the context\n");
1471                         err = PTR_ERR(disp_dev->dev[i]->alloc_ctx);
1472                         goto probe_out;
1473                 }
1474
1475                 INIT_LIST_HEAD(&disp_dev->dev[i]->dma_queue);
1476
1477                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1478                         err = -ENODEV;
1479                         goto probe_out;
1480                 }
1481         }
1482
1483         v4l2_dbg(1, debug, v4l2_dev,
1484                  "Successfully completed the probing of vpbe v4l2 device\n");
1485
1486         return 0;
1487
1488 probe_out:
1489         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1490                 /* Unregister video device */
1491                 if (disp_dev->dev[k] != NULL) {
1492                         vb2_dma_contig_cleanup_ctx(disp_dev->dev[k]->alloc_ctx);
1493                         video_unregister_device(&disp_dev->dev[k]->video_dev);
1494                         kfree(disp_dev->dev[k]);
1495                 }
1496         }
1497         return err;
1498 }
1499
1500 /*
1501  * vpbe_display_remove()
1502  * It un-register hardware layer from V4L2 driver
1503  */
1504 static int vpbe_display_remove(struct platform_device *pdev)
1505 {
1506         struct vpbe_layer *vpbe_display_layer;
1507         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1508         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1509         int i;
1510
1511         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1512
1513         /* deinitialize the vpbe display controller */
1514         if (NULL != vpbe_dev->ops.deinitialize)
1515                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1516         /* un-register device */
1517         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1518                 /* Get the pointer to the layer object */
1519                 vpbe_display_layer = disp_dev->dev[i];
1520                 vb2_dma_contig_cleanup_ctx(vpbe_display_layer->alloc_ctx);
1521                 /* Unregister video device */
1522                 video_unregister_device(&vpbe_display_layer->video_dev);
1523
1524         }
1525         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1526                 kfree(disp_dev->dev[i]);
1527                 disp_dev->dev[i] = NULL;
1528         }
1529
1530         return 0;
1531 }
1532
1533 static struct platform_driver vpbe_display_driver = {
1534         .driver = {
1535                 .name = VPBE_DISPLAY_DRIVER,
1536                 .owner = THIS_MODULE,
1537                 .bus = &platform_bus_type,
1538         },
1539         .probe = vpbe_display_probe,
1540         .remove = vpbe_display_remove,
1541 };
1542
1543 module_platform_driver(vpbe_display_driver);
1544
1545 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1546 MODULE_LICENSE("GPL");
1547 MODULE_AUTHOR("Texas Instruments");