drivers/media/platform/davinci/vpbe

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This source file includes following definitions.
venc_is_second_field
vpbe_isr_even_field
vpbe_isr_odd_field
venc_isr
vpbe_buffer_prepare
vpbe_buffer_queue_setup
vpbe_buffer_queue
vpbe_start_streaming
vpbe_stop_streaming
_vpbe_display_get_other_win_layer
vpbe_set_osd_display_params
vpbe_disp_calculate_scale_factor
vpbe_disp_adj_position
vpbe_disp_check_window_params
vpbe_try_format
vpbe_display_querycap
vpbe_display_s_selection
vpbe_display_g_selection
vpbe_display_g_pixelaspect
vpbe_display_g_fmt
vpbe_display_enum_fmt
vpbe_display_s_fmt
vpbe_display_try_fmt
vpbe_display_s_std
vpbe_display_g_std
vpbe_display_enum_output
vpbe_display_s_output
vpbe_display_g_output
vpbe_display_enum_dv_timings
vpbe_display_s_dv_timings
vpbe_display_g_dv_timings
vpbe_display_open
vpbe_display_release
vpbe_device_get
init_vpbe_layer
register_device
vpbe_display_probe
vpbe_display_remove
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   4  */
   5 #include <linux/kernel.h>
   6 #include <linux/init.h>
   7 #include <linux/module.h>
   8 #include <linux/errno.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/string.h>
  11 #include <linux/wait.h>
  12 #include <linux/time.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/irq.h>
  15 #include <linux/mm.h>
  16 #include <linux/mutex.h>
  17 #include <linux/videodev2.h>
  18 #include <linux/slab.h>
  19 
  20 #include <asm/pgtable.h>
  21 
  22 #include <media/v4l2-dev.h>
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/davinci/vpbe_display.h>
  27 #include <media/davinci/vpbe_types.h>
  28 #include <media/davinci/vpbe.h>
  29 #include <media/davinci/vpbe_venc.h>
  30 #include <media/davinci/vpbe_osd.h>
  31 #include "vpbe_venc_regs.h"
  32 
  33 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
  34 
  35 static int debug;
  36 
  37 #define VPBE_DEFAULT_NUM_BUFS 3
  38 
  39 module_param(debug, int, 0644);
  40 
  41 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
  42                         struct vpbe_layer *layer);
  43 
  44 static int venc_is_second_field(struct vpbe_display *disp_dev)
  45 {
  46         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
  47         int ret, val;
  48 
  49         ret = v4l2_subdev_call(vpbe_dev->venc,
  50                                core,
  51                                ioctl,
  52                                VENC_GET_FLD,
  53                                &val);
  54         if (ret < 0) {
  55                 v4l2_err(&vpbe_dev->v4l2_dev,
  56                          "Error in getting Field ID 0\n");
  57                 return 1;
  58         }
  59         return val;
  60 }
  61 
  62 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
  63                                 struct vpbe_layer *layer)
  64 {
  65         if (layer->cur_frm == layer->next_frm)
  66                 return;
  67 
  68         layer->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
  69         vb2_buffer_done(&layer->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
  70         /* Make cur_frm pointing to next_frm */
  71         layer->cur_frm = layer->next_frm;
  72 }
  73 
  74 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
  75                                 struct vpbe_layer *layer)
  76 {
  77         struct osd_state *osd_device = disp_obj->osd_device;
  78         unsigned long addr;
  79 
  80         spin_lock(&disp_obj->dma_queue_lock);
  81         if (list_empty(&layer->dma_queue) ||
  82                 (layer->cur_frm != layer->next_frm)) {
  83                 spin_unlock(&disp_obj->dma_queue_lock);
  84                 return;
  85         }
  86         /*
  87          * one field is displayed configure
  88          * the next frame if it is available
  89          * otherwise hold on current frame
  90          * Get next from the buffer queue
  91          */
  92         layer->next_frm = list_entry(layer->dma_queue.next,
  93                           struct  vpbe_disp_buffer, list);
  94         /* Remove that from the buffer queue */
  95         list_del(&layer->next_frm->list);
  96         spin_unlock(&disp_obj->dma_queue_lock);
  97         /* Mark state of the frame to active */
  98         layer->next_frm->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
  99         addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb.vb2_buf, 0);
 100         osd_device->ops.start_layer(osd_device,
 101                         layer->layer_info.id,
 102                         addr,
 103                         disp_obj->cbcr_ofst);
 104 }
 105 
 106 /* interrupt service routine */
 107 static irqreturn_t venc_isr(int irq, void *arg)
 108 {
 109         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
 110         struct vpbe_layer *layer;
 111         static unsigned last_event;
 112         unsigned event = 0;
 113         int fid;
 114         int i;
 115 
 116         if (!arg || !disp_dev->dev[0])
 117                 return IRQ_HANDLED;
 118 
 119         if (venc_is_second_field(disp_dev))
 120                 event |= VENC_SECOND_FIELD;
 121         else
 122                 event |= VENC_FIRST_FIELD;
 123 
 124         if (event == (last_event & ~VENC_END_OF_FRAME)) {
 125                 /*
 126                 * If the display is non-interlaced, then we need to flag the
 127                 * end-of-frame event at every interrupt regardless of the
 128                 * value of the FIDST bit.  We can conclude that the display is
 129                 * non-interlaced if the value of the FIDST bit is unchanged
 130                 * from the previous interrupt.
 131                 */
 132                 event |= VENC_END_OF_FRAME;
 133         } else if (event == VENC_SECOND_FIELD) {
 134                 /* end-of-frame for interlaced display */
 135                 event |= VENC_END_OF_FRAME;
 136         }
 137         last_event = event;
 138 
 139         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
 140                 layer = disp_dev->dev[i];
 141 
 142                 if (!vb2_start_streaming_called(&layer->buffer_queue))
 143                         continue;
 144 
 145                 if (layer->layer_first_int) {
 146                         layer->layer_first_int = 0;
 147                         continue;
 148                 }
 149                 /* Check the field format */
 150                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
 151                         (event & VENC_END_OF_FRAME)) {
 152                         /* Progressive mode */
 153 
 154                         vpbe_isr_even_field(disp_dev, layer);
 155                         vpbe_isr_odd_field(disp_dev, layer);
 156                 } else {
 157                 /* Interlaced mode */
 158 
 159                         layer->field_id ^= 1;
 160                         if (event & VENC_FIRST_FIELD)
 161                                 fid = 0;
 162                         else
 163                                 fid = 1;
 164 
 165                         /*
 166                         * If field id does not match with store
 167                         * field id
 168                         */
 169                         if (fid != layer->field_id) {
 170                                 /* Make them in sync */
 171                                 layer->field_id = fid;
 172                                 continue;
 173                         }
 174                         /*
 175                         * device field id and local field id are
 176                         * in sync. If this is even field
 177                         */
 178                         if (0 == fid)
 179                                 vpbe_isr_even_field(disp_dev, layer);
 180                         else  /* odd field */
 181                                 vpbe_isr_odd_field(disp_dev, layer);
 182                 }
 183         }
 184 
 185         return IRQ_HANDLED;
 186 }
 187 
 188 /*
 189  * vpbe_buffer_prepare()
 190  * This is the callback function called from vb2_qbuf() function
 191  * the buffer is prepared and user space virtual address is converted into
 192  * physical address
 193  */
 194 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
 195 {
 196         struct vb2_queue *q = vb->vb2_queue;
 197         struct vpbe_layer *layer = vb2_get_drv_priv(q);
 198         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 199         unsigned long addr;
 200 
 201         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 202                                 "vpbe_buffer_prepare\n");
 203 
 204         vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
 205         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 206                 return -EINVAL;
 207 
 208         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 209         if (!IS_ALIGNED(addr, 8)) {
 210                 v4l2_err(&vpbe_dev->v4l2_dev,
 211                          "buffer_prepare:offset is not aligned to 32 bytes\n");
 212                 return -EINVAL;
 213         }
 214         return 0;
 215 }
 216 
 217 /*
 218  * vpbe_buffer_setup()
 219  * This function allocates memory for the buffers
 220  */
 221 static int
 222 vpbe_buffer_queue_setup(struct vb2_queue *vq,
 223                         unsigned int *nbuffers, unsigned int *nplanes,
 224                         unsigned int sizes[], struct device *alloc_devs[])
 225 
 226 {
 227         /* Get the file handle object and layer object */
 228         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 229         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 230 
 231         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 232 
 233         /* Store number of buffers allocated in numbuffer member */
 234         if (vq->num_buffers + *nbuffers < VPBE_DEFAULT_NUM_BUFS)
 235                 *nbuffers = VPBE_DEFAULT_NUM_BUFS - vq->num_buffers;
 236 
 237         if (*nplanes)
 238                 return sizes[0] < layer->pix_fmt.sizeimage ? -EINVAL : 0;
 239 
 240         *nplanes = 1;
 241         sizes[0] = layer->pix_fmt.sizeimage;
 242 
 243         return 0;
 244 }
 245 
 246 /*
 247  * vpbe_buffer_queue()
 248  * This function adds the buffer to DMA queue
 249  */
 250 static void vpbe_buffer_queue(struct vb2_buffer *vb)
 251 {
 252         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 253         /* Get the file handle object and layer object */
 254         struct vpbe_disp_buffer *buf = container_of(vbuf,
 255                                 struct vpbe_disp_buffer, vb);
 256         struct vpbe_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
 257         struct vpbe_display *disp = layer->disp_dev;
 258         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 259         unsigned long flags;
 260 
 261         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 262                         "vpbe_buffer_queue\n");
 263 
 264         /* add the buffer to the DMA queue */
 265         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 266         list_add_tail(&buf->list, &layer->dma_queue);
 267         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 268 }
 269 
 270 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
 271 {
 272         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 273         struct osd_state *osd_device = layer->disp_dev->osd_device;
 274         int ret;
 275 
 276         osd_device->ops.disable_layer(osd_device, layer->layer_info.id);
 277 
 278         /* Get the next frame from the buffer queue */
 279         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
 280                                 struct vpbe_disp_buffer, list);
 281         /* Remove buffer from the buffer queue */
 282         list_del(&layer->cur_frm->list);
 283         /* Mark state of the current frame to active */
 284         layer->cur_frm->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
 285         /* Initialize field_id and started member */
 286         layer->field_id = 0;
 287 
 288         /* Set parameters in OSD and VENC */
 289         ret = vpbe_set_osd_display_params(layer->disp_dev, layer);
 290         if (ret < 0) {
 291                 struct vpbe_disp_buffer *buf, *tmp;
 292 
 293                 vb2_buffer_done(&layer->cur_frm->vb.vb2_buf,
 294                                 VB2_BUF_STATE_QUEUED);
 295                 list_for_each_entry_safe(buf, tmp, &layer->dma_queue, list) {
 296                         list_del(&buf->list);
 297                         vb2_buffer_done(&buf->vb.vb2_buf,
 298                                         VB2_BUF_STATE_QUEUED);
 299                 }
 300 
 301                 return ret;
 302         }
 303 
 304         /*
 305          * if request format is yuv420 semiplanar, need to
 306          * enable both video windows
 307          */
 308         layer->layer_first_int = 1;
 309 
 310         return ret;
 311 }
 312 
 313 static void vpbe_stop_streaming(struct vb2_queue *vq)
 314 {
 315         struct vpbe_layer *layer = vb2_get_drv_priv(vq);
 316         struct osd_state *osd_device = layer->disp_dev->osd_device;
 317         struct vpbe_display *disp = layer->disp_dev;
 318         unsigned long flags;
 319 
 320         if (!vb2_is_streaming(vq))
 321                 return;
 322 
 323         osd_device->ops.disable_layer(osd_device, layer->layer_info.id);
 324 
 325         /* release all active buffers */
 326         spin_lock_irqsave(&disp->dma_queue_lock, flags);
 327         if (layer->cur_frm == layer->next_frm) {
 328                 vb2_buffer_done(&layer->cur_frm->vb.vb2_buf,
 329                                 VB2_BUF_STATE_ERROR);
 330         } else {
 331                 if (layer->cur_frm)
 332                         vb2_buffer_done(&layer->cur_frm->vb.vb2_buf,
 333                                         VB2_BUF_STATE_ERROR);
 334                 if (layer->next_frm)
 335                         vb2_buffer_done(&layer->next_frm->vb.vb2_buf,
 336                                         VB2_BUF_STATE_ERROR);
 337         }
 338 
 339         while (!list_empty(&layer->dma_queue)) {
 340                 layer->next_frm = list_entry(layer->dma_queue.next,
 341                                                 struct vpbe_disp_buffer, list);
 342                 list_del(&layer->next_frm->list);
 343                 vb2_buffer_done(&layer->next_frm->vb.vb2_buf,
 344                                 VB2_BUF_STATE_ERROR);
 345         }
 346         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
 347 }
 348 
 349 static const struct vb2_ops video_qops = {
 350         .queue_setup = vpbe_buffer_queue_setup,
 351         .wait_prepare = vb2_ops_wait_prepare,
 352         .wait_finish = vb2_ops_wait_finish,
 353         .buf_prepare = vpbe_buffer_prepare,
 354         .start_streaming = vpbe_start_streaming,
 355         .stop_streaming = vpbe_stop_streaming,
 356         .buf_queue = vpbe_buffer_queue,
 357 };
 358 
 359 static
 360 struct vpbe_layer*
 361 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
 362                         struct vpbe_layer *layer)
 363 {
 364         enum vpbe_display_device_id thiswin, otherwin;
 365         thiswin = layer->device_id;
 366 
 367         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
 368         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
 369         return disp_dev->dev[otherwin];
 370 }
 371 
 372 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 373                         struct vpbe_layer *layer)
 374 {
 375         struct osd_layer_config *cfg  = &layer->layer_info.config;
 376         struct osd_state *osd_device = disp_dev->osd_device;
 377         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 378         unsigned long addr;
 379         int ret;
 380 
 381         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb.vb2_buf, 0);
 382         /* Set address in the display registers */
 383         osd_device->ops.start_layer(osd_device,
 384                                     layer->layer_info.id,
 385                                     addr,
 386                                     disp_dev->cbcr_ofst);
 387 
 388         ret = osd_device->ops.enable_layer(osd_device,
 389                                 layer->layer_info.id, 0);
 390         if (ret < 0) {
 391                 v4l2_err(&vpbe_dev->v4l2_dev,
 392                         "Error in enabling osd window layer 0\n");
 393                 return -1;
 394         }
 395 
 396         /* Enable the window */
 397         layer->layer_info.enable = 1;
 398         if (cfg->pixfmt == PIXFMT_NV12) {
 399                 struct vpbe_layer *otherlayer =
 400                         _vpbe_display_get_other_win_layer(disp_dev, layer);
 401 
 402                 ret = osd_device->ops.enable_layer(osd_device,
 403                                 otherlayer->layer_info.id, 1);
 404                 if (ret < 0) {
 405                         v4l2_err(&vpbe_dev->v4l2_dev,
 406                                 "Error in enabling osd window layer 1\n");
 407                         return -1;
 408                 }
 409                 otherlayer->layer_info.enable = 1;
 410         }
 411         return 0;
 412 }
 413 
 414 static void
 415 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
 416                         struct vpbe_layer *layer,
 417                         int expected_xsize, int expected_ysize)
 418 {
 419         struct display_layer_info *layer_info = &layer->layer_info;
 420         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
 421         struct osd_layer_config *cfg  = &layer->layer_info.config;
 422         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 423         int calculated_xsize;
 424         int h_exp = 0;
 425         int v_exp = 0;
 426         int h_scale;
 427         int v_scale;
 428 
 429         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
 430 
 431         /*
 432          * Application initially set the image format. Current display
 433          * size is obtained from the vpbe display controller. expected_xsize
 434          * and expected_ysize are set through S_SELECTION ioctl. Based on this,
 435          * driver will calculate the scale factors for vertical and
 436          * horizontal direction so that the image is displayed scaled
 437          * and expanded. Application uses expansion to display the image
 438          * in a square pixel. Otherwise it is displayed using displays
 439          * pixel aspect ratio.It is expected that application chooses
 440          * the crop coordinates for cropped or scaled display. if crop
 441          * size is less than the image size, it is displayed cropped or
 442          * it is displayed scaled and/or expanded.
 443          *
 444          * to begin with, set the crop window same as expected. Later we
 445          * will override with scaled window size
 446          */
 447 
 448         cfg->xsize = pixfmt->width;
 449         cfg->ysize = pixfmt->height;
 450         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
 451         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
 452         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
 453         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
 454 
 455         if (pixfmt->width < expected_xsize) {
 456                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
 457                 if (h_scale < 2)
 458                         h_scale = 1;
 459                 else if (h_scale >= 4)
 460                         h_scale = 4;
 461                 else
 462                         h_scale = 2;
 463                 cfg->xsize *= h_scale;
 464                 if (cfg->xsize < expected_xsize) {
 465                         if ((standard_id & V4L2_STD_525_60) ||
 466                         (standard_id & V4L2_STD_625_50)) {
 467                                 calculated_xsize = (cfg->xsize *
 468                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
 469                                         VPBE_DISPLAY_H_EXP_RATIO_D;
 470                                 if (calculated_xsize <= expected_xsize) {
 471                                         h_exp = 1;
 472                                         cfg->xsize = calculated_xsize;
 473                                 }
 474                         }
 475                 }
 476                 if (h_scale == 2)
 477                         layer_info->h_zoom = ZOOM_X2;
 478                 else if (h_scale == 4)
 479                         layer_info->h_zoom = ZOOM_X4;
 480                 if (h_exp)
 481                         layer_info->h_exp = H_EXP_9_OVER_8;
 482         } else {
 483                 /* no scaling, only cropping. Set display area to crop area */
 484                 cfg->xsize = expected_xsize;
 485         }
 486 
 487         if (pixfmt->height < expected_ysize) {
 488                 v_scale = expected_ysize / pixfmt->height;
 489                 if (v_scale < 2)
 490                         v_scale = 1;
 491                 else if (v_scale >= 4)
 492                         v_scale = 4;
 493                 else
 494                         v_scale = 2;
 495                 cfg->ysize *= v_scale;
 496                 if (cfg->ysize < expected_ysize) {
 497                         if ((standard_id & V4L2_STD_625_50)) {
 498                                 calculated_xsize = (cfg->ysize *
 499                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
 500                                         VPBE_DISPLAY_V_EXP_RATIO_D;
 501                                 if (calculated_xsize <= expected_ysize) {
 502                                         v_exp = 1;
 503                                         cfg->ysize = calculated_xsize;
 504                                 }
 505                         }
 506                 }
 507                 if (v_scale == 2)
 508                         layer_info->v_zoom = ZOOM_X2;
 509                 else if (v_scale == 4)
 510                         layer_info->v_zoom = ZOOM_X4;
 511                 if (v_exp)
 512                         layer_info->v_exp = V_EXP_6_OVER_5;
 513         } else {
 514                 /* no scaling, only cropping. Set display area to crop area */
 515                 cfg->ysize = expected_ysize;
 516         }
 517         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 518                 "crop display xsize = %d, ysize = %d\n",
 519                 cfg->xsize, cfg->ysize);
 520 }
 521 
 522 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
 523                         struct vpbe_layer *layer,
 524                         int top, int left)
 525 {
 526         struct osd_layer_config *cfg = &layer->layer_info.config;
 527         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 528 
 529         cfg->xpos = min((unsigned int)left,
 530                         vpbe_dev->current_timings.xres - cfg->xsize);
 531         cfg->ypos = min((unsigned int)top,
 532                         vpbe_dev->current_timings.yres - cfg->ysize);
 533 
 534         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 535                 "new xpos = %d, ypos = %d\n",
 536                 cfg->xpos, cfg->ypos);
 537 }
 538 
 539 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
 540                         struct v4l2_rect *c)
 541 {
 542         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 543 
 544         if ((c->width == 0) ||
 545           ((c->width + c->left) > vpbe_dev->current_timings.xres))
 546                 c->width = vpbe_dev->current_timings.xres - c->left;
 547 
 548         if ((c->height == 0) || ((c->height + c->top) >
 549           vpbe_dev->current_timings.yres))
 550                 c->height = vpbe_dev->current_timings.yres - c->top;
 551 
 552         /* window height must be even for interlaced display */
 553         if (vpbe_dev->current_timings.interlaced)
 554                 c->height &= (~0x01);
 555 
 556 }
 557 
 558 /*
 559  * vpbe_try_format()
 560  * If user application provides width and height, and have bytesperline set
 561  * to zero, driver calculates bytesperline and sizeimage based on hardware
 562  * limits.
 563  */
 564 static int vpbe_try_format(struct vpbe_display *disp_dev,
 565                         struct v4l2_pix_format *pixfmt, int check)
 566 {
 567         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 568         int min_height = 1;
 569         int min_width = 32;
 570         int max_height;
 571         int max_width;
 572         int bpp;
 573 
 574         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
 575             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
 576                 /* choose default as V4L2_PIX_FMT_UYVY */
 577                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
 578 
 579         /* Check the field format */
 580         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
 581                 (pixfmt->field != V4L2_FIELD_NONE)) {
 582                 if (vpbe_dev->current_timings.interlaced)
 583                         pixfmt->field = V4L2_FIELD_INTERLACED;
 584                 else
 585                         pixfmt->field = V4L2_FIELD_NONE;
 586         }
 587 
 588         if (pixfmt->field == V4L2_FIELD_INTERLACED)
 589                 min_height = 2;
 590 
 591         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 592                 bpp = 1;
 593         else
 594                 bpp = 2;
 595 
 596         max_width = vpbe_dev->current_timings.xres;
 597         max_height = vpbe_dev->current_timings.yres;
 598 
 599         min_width /= bpp;
 600 
 601         if (!pixfmt->width || (pixfmt->width < min_width) ||
 602                 (pixfmt->width > max_width)) {
 603                 pixfmt->width = vpbe_dev->current_timings.xres;
 604         }
 605 
 606         if (!pixfmt->height || (pixfmt->height  < min_height) ||
 607                 (pixfmt->height  > max_height)) {
 608                 pixfmt->height = vpbe_dev->current_timings.yres;
 609         }
 610 
 611         if (pixfmt->bytesperline < (pixfmt->width * bpp))
 612                 pixfmt->bytesperline = pixfmt->width * bpp;
 613 
 614         /* Make the bytesperline 32 byte aligned */
 615         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
 616 
 617         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
 618                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
 619                                 (pixfmt->bytesperline * pixfmt->height >> 1);
 620         else
 621                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 622 
 623         return 0;
 624 }
 625 
 626 static int vpbe_display_querycap(struct file *file, void  *priv,
 627                                struct v4l2_capability *cap)
 628 {
 629         struct vpbe_layer *layer = video_drvdata(file);
 630         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 631 
 632         snprintf(cap->driver, sizeof(cap->driver), "%s",
 633                 dev_name(vpbe_dev->pdev));
 634         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 635                  dev_name(vpbe_dev->pdev));
 636         strscpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 637 
 638         return 0;
 639 }
 640 
 641 static int vpbe_display_s_selection(struct file *file, void *priv,
 642                              struct v4l2_selection *sel)
 643 {
 644         struct vpbe_layer *layer = video_drvdata(file);
 645         struct vpbe_display *disp_dev = layer->disp_dev;
 646         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 647         struct osd_layer_config *cfg = &layer->layer_info.config;
 648         struct osd_state *osd_device = disp_dev->osd_device;
 649         struct v4l2_rect rect = sel->r;
 650         int ret;
 651 
 652         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 653                 "VIDIOC_S_SELECTION, layer id = %d\n", layer->device_id);
 654 
 655         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 656             sel->target != V4L2_SEL_TGT_CROP)
 657                 return -EINVAL;
 658 
 659         if (rect.top < 0)
 660                 rect.top = 0;
 661         if (rect.left < 0)
 662                 rect.left = 0;
 663 
 664         vpbe_disp_check_window_params(disp_dev, &rect);
 665 
 666         osd_device->ops.get_layer_config(osd_device,
 667                         layer->layer_info.id, cfg);
 668 
 669         vpbe_disp_calculate_scale_factor(disp_dev, layer,
 670                                         rect.width,
 671                                         rect.height);
 672         vpbe_disp_adj_position(disp_dev, layer, rect.top,
 673                                         rect.left);
 674         ret = osd_device->ops.set_layer_config(osd_device,
 675                                 layer->layer_info.id, cfg);
 676         if (ret < 0) {
 677                 v4l2_err(&vpbe_dev->v4l2_dev,
 678                         "Error in set layer config:\n");
 679                 return -EINVAL;
 680         }
 681 
 682         /* apply zooming and h or v expansion */
 683         osd_device->ops.set_zoom(osd_device,
 684                         layer->layer_info.id,
 685                         layer->layer_info.h_zoom,
 686                         layer->layer_info.v_zoom);
 687         ret = osd_device->ops.set_vid_expansion(osd_device,
 688                         layer->layer_info.h_exp,
 689                         layer->layer_info.v_exp);
 690         if (ret < 0) {
 691                 v4l2_err(&vpbe_dev->v4l2_dev,
 692                 "Error in set vid expansion:\n");
 693                 return -EINVAL;
 694         }
 695 
 696         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
 697                 (layer->layer_info.v_zoom != ZOOM_X1) ||
 698                 (layer->layer_info.h_exp != H_EXP_OFF) ||
 699                 (layer->layer_info.v_exp != V_EXP_OFF))
 700                 /* Enable expansion filter */
 701                 osd_device->ops.set_interpolation_filter(osd_device, 1);
 702         else
 703                 osd_device->ops.set_interpolation_filter(osd_device, 0);
 704 
 705         sel->r = rect;
 706         return 0;
 707 }
 708 
 709 static int vpbe_display_g_selection(struct file *file, void *priv,
 710                                     struct v4l2_selection *sel)
 711 {
 712         struct vpbe_layer *layer = video_drvdata(file);
 713         struct osd_layer_config *cfg = &layer->layer_info.config;
 714         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 715         struct osd_state *osd_device = layer->disp_dev->osd_device;
 716         struct v4l2_rect *rect = &sel->r;
 717 
 718         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 719                         "VIDIOC_G_SELECTION, layer id = %d\n",
 720                         layer->device_id);
 721 
 722         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 723                 return -EINVAL;
 724 
 725         switch (sel->target) {
 726         case V4L2_SEL_TGT_CROP:
 727                 osd_device->ops.get_layer_config(osd_device,
 728                                                  layer->layer_info.id, cfg);
 729                 rect->top = cfg->ypos;
 730                 rect->left = cfg->xpos;
 731                 rect->width = cfg->xsize;
 732                 rect->height = cfg->ysize;
 733                 break;
 734         case V4L2_SEL_TGT_CROP_DEFAULT:
 735         case V4L2_SEL_TGT_CROP_BOUNDS:
 736                 rect->left = 0;
 737                 rect->top = 0;
 738                 rect->width = vpbe_dev->current_timings.xres;
 739                 rect->height = vpbe_dev->current_timings.yres;
 740                 break;
 741         default:
 742                 return -EINVAL;
 743         }
 744 
 745         return 0;
 746 }
 747 
 748 static int vpbe_display_g_pixelaspect(struct file *file, void *priv,
 749                                       int type, struct v4l2_fract *f)
 750 {
 751         struct vpbe_layer *layer = video_drvdata(file);
 752         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 753 
 754         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
 755 
 756         if (type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 757                 return -EINVAL;
 758 
 759         *f = vpbe_dev->current_timings.aspect;
 760         return 0;
 761 }
 762 
 763 static int vpbe_display_g_fmt(struct file *file, void *priv,
 764                                 struct v4l2_format *fmt)
 765 {
 766         struct vpbe_layer *layer = video_drvdata(file);
 767         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 768 
 769         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 770                         "VIDIOC_G_FMT, layer id = %d\n",
 771                         layer->device_id);
 772 
 773         /* If buffer type is video output */
 774         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 775                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 776                 return -EINVAL;
 777         }
 778         /* Fill in the information about format */
 779         fmt->fmt.pix = layer->pix_fmt;
 780 
 781         return 0;
 782 }
 783 
 784 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
 785                                    struct v4l2_fmtdesc *fmt)
 786 {
 787         struct vpbe_layer *layer = video_drvdata(file);
 788         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 789 
 790         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 791                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
 792                                 layer->device_id);
 793         if (fmt->index > 1) {
 794                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
 795                 return -EINVAL;
 796         }
 797 
 798         /* Fill in the information about format */
 799         if (fmt->index == 0)
 800                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
 801         else
 802                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
 803 
 804         return 0;
 805 }
 806 
 807 static int vpbe_display_s_fmt(struct file *file, void *priv,
 808                                 struct v4l2_format *fmt)
 809 {
 810         struct vpbe_layer *layer = video_drvdata(file);
 811         struct vpbe_display *disp_dev = layer->disp_dev;
 812         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 813         struct osd_layer_config *cfg  = &layer->layer_info.config;
 814         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 815         struct osd_state *osd_device = disp_dev->osd_device;
 816         int ret;
 817 
 818         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 819                         "VIDIOC_S_FMT, layer id = %d\n",
 820                         layer->device_id);
 821 
 822         if (vb2_is_busy(&layer->buffer_queue))
 823                 return -EBUSY;
 824 
 825         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 826                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
 827                 return -EINVAL;
 828         }
 829         /* Check for valid pixel format */
 830         ret = vpbe_try_format(disp_dev, pixfmt, 1);
 831         if (ret)
 832                 return ret;
 833 
 834         /* YUV420 is requested, check availability of the
 835         other video window */
 836 
 837         layer->pix_fmt = *pixfmt;
 838         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
 839                 struct vpbe_layer *otherlayer;
 840 
 841                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
 842                 /* if other layer is available, only
 843                  * claim it, do not configure it
 844                  */
 845                 ret = osd_device->ops.request_layer(osd_device,
 846                                                     otherlayer->layer_info.id);
 847                 if (ret < 0) {
 848                         v4l2_err(&vpbe_dev->v4l2_dev,
 849                                  "Display Manager failed to allocate layer\n");
 850                         return -EBUSY;
 851                 }
 852         }
 853 
 854         /* Get osd layer config */
 855         osd_device->ops.get_layer_config(osd_device,
 856                         layer->layer_info.id, cfg);
 857         /* Store the pixel format in the layer object */
 858         cfg->xsize = pixfmt->width;
 859         cfg->ysize = pixfmt->height;
 860         cfg->line_length = pixfmt->bytesperline;
 861         cfg->ypos = 0;
 862         cfg->xpos = 0;
 863         cfg->interlaced = vpbe_dev->current_timings.interlaced;
 864 
 865         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
 866                 cfg->pixfmt = PIXFMT_YCBCRI;
 867 
 868         /* Change of the default pixel format for both video windows */
 869         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
 870                 struct vpbe_layer *otherlayer;
 871                 cfg->pixfmt = PIXFMT_NV12;
 872                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
 873                                                                 layer);
 874                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
 875         }
 876 
 877         /* Set the layer config in the osd window */
 878         ret = osd_device->ops.set_layer_config(osd_device,
 879                                 layer->layer_info.id, cfg);
 880         if (ret < 0) {
 881                 v4l2_err(&vpbe_dev->v4l2_dev,
 882                                 "Error in S_FMT params:\n");
 883                 return -EINVAL;
 884         }
 885 
 886         /* Readback and fill the local copy of current pix format */
 887         osd_device->ops.get_layer_config(osd_device,
 888                         layer->layer_info.id, cfg);
 889 
 890         return 0;
 891 }
 892 
 893 static int vpbe_display_try_fmt(struct file *file, void *priv,
 894                                   struct v4l2_format *fmt)
 895 {
 896         struct vpbe_layer *layer = video_drvdata(file);
 897         struct vpbe_display *disp_dev = layer->disp_dev;
 898         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 899         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 900 
 901         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
 902 
 903         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
 904                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
 905                 return -EINVAL;
 906         }
 907 
 908         /* Check for valid field format */
 909         return  vpbe_try_format(disp_dev, pixfmt, 0);
 910 
 911 }
 912 
 913 /*
 914  * vpbe_display_s_std - Set the given standard in the encoder
 915  *
 916  * Sets the standard if supported by the current encoder. Return the status.
 917  * 0 - success & -EINVAL on error
 918  */
 919 static int vpbe_display_s_std(struct file *file, void *priv,
 920                                 v4l2_std_id std_id)
 921 {
 922         struct vpbe_layer *layer = video_drvdata(file);
 923         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 924         int ret;
 925 
 926         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
 927 
 928         if (vb2_is_busy(&layer->buffer_queue))
 929                 return -EBUSY;
 930 
 931         if (vpbe_dev->ops.s_std) {
 932                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
 933                 if (ret) {
 934                         v4l2_err(&vpbe_dev->v4l2_dev,
 935                         "Failed to set standard for sub devices\n");
 936                         return -EINVAL;
 937                 }
 938         } else {
 939                 return -EINVAL;
 940         }
 941 
 942         return 0;
 943 }
 944 
 945 /*
 946  * vpbe_display_g_std - Get the standard in the current encoder
 947  *
 948  * Get the standard in the current encoder. Return the status. 0 - success
 949  * -EINVAL on error
 950  */
 951 static int vpbe_display_g_std(struct file *file, void *priv,
 952                                 v4l2_std_id *std_id)
 953 {
 954         struct vpbe_layer *layer = video_drvdata(file);
 955         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 956 
 957         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
 958 
 959         /* Get the standard from the current encoder */
 960         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
 961                 *std_id = vpbe_dev->current_timings.std_id;
 962                 return 0;
 963         }
 964 
 965         return -EINVAL;
 966 }
 967 
 968 /*
 969  * vpbe_display_enum_output - enumerate outputs
 970  *
 971  * Enumerates the outputs available at the vpbe display
 972  * returns the status, -EINVAL if end of output list
 973  */
 974 static int vpbe_display_enum_output(struct file *file, void *priv,
 975                                     struct v4l2_output *output)
 976 {
 977         struct vpbe_layer *layer = video_drvdata(file);
 978         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
 979         int ret;
 980 
 981         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
 982 
 983         /* Enumerate outputs */
 984         if (!vpbe_dev->ops.enum_outputs)
 985                 return -EINVAL;
 986 
 987         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
 988         if (ret) {
 989                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
 990                         "Failed to enumerate outputs\n");
 991                 return -EINVAL;
 992         }
 993 
 994         return 0;
 995 }
 996 
 997 /*
 998  * vpbe_display_s_output - Set output to
 999  * the output specified by the index
1000  */
1001 static int vpbe_display_s_output(struct file *file, void *priv,
1002                                 unsigned int i)
1003 {
1004         struct vpbe_layer *layer = video_drvdata(file);
1005         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1006         int ret;
1007 
1008         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1009 
1010         if (vb2_is_busy(&layer->buffer_queue))
1011                 return -EBUSY;
1012 
1013         if (!vpbe_dev->ops.set_output)
1014                 return -EINVAL;
1015 
1016         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1017         if (ret) {
1018                 v4l2_err(&vpbe_dev->v4l2_dev,
1019                         "Failed to set output for sub devices\n");
1020                 return -EINVAL;
1021         }
1022 
1023         return 0;
1024 }
1025 
1026 /*
1027  * vpbe_display_g_output - Get output from subdevice
1028  * for a given by the index
1029  */
1030 static int vpbe_display_g_output(struct file *file, void *priv,
1031                                 unsigned int *i)
1032 {
1033         struct vpbe_layer *layer = video_drvdata(file);
1034         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1035 
1036         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1037         /* Get the standard from the current encoder */
1038         *i = vpbe_dev->current_out_index;
1039 
1040         return 0;
1041 }
1042 
1043 /*
1044  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1045  *
1046  * enum the timings in the current encoder. Return the status. 0 - success
1047  * -EINVAL on error
1048  */
1049 static int
1050 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1051                         struct v4l2_enum_dv_timings *timings)
1052 {
1053         struct vpbe_layer *layer = video_drvdata(file);
1054         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1055         int ret;
1056 
1057         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1058 
1059         /* Enumerate outputs */
1060         if (!vpbe_dev->ops.enum_dv_timings)
1061                 return -EINVAL;
1062 
1063         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1064         if (ret) {
1065                 v4l2_err(&vpbe_dev->v4l2_dev,
1066                         "Failed to enumerate dv timings info\n");
1067                 return -EINVAL;
1068         }
1069 
1070         return 0;
1071 }
1072 
1073 /*
1074  * vpbe_display_s_dv_timings - Set the dv timings
1075  *
1076  * Set the timings in the current encoder. Return the status. 0 - success
1077  * -EINVAL on error
1078  */
1079 static int
1080 vpbe_display_s_dv_timings(struct file *file, void *priv,
1081                                 struct v4l2_dv_timings *timings)
1082 {
1083         struct vpbe_layer *layer = video_drvdata(file);
1084         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1085         int ret;
1086 
1087         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1088 
1089         if (vb2_is_busy(&layer->buffer_queue))
1090                 return -EBUSY;
1091 
1092         /* Set the given standard in the encoder */
1093         if (!vpbe_dev->ops.s_dv_timings)
1094                 return -EINVAL;
1095 
1096         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1097         if (ret) {
1098                 v4l2_err(&vpbe_dev->v4l2_dev,
1099                         "Failed to set the dv timings info\n");
1100                 return -EINVAL;
1101         }
1102 
1103         return 0;
1104 }
1105 
1106 /*
1107  * vpbe_display_g_dv_timings - Set the dv timings
1108  *
1109  * Get the timings in the current encoder. Return the status. 0 - success
1110  * -EINVAL on error
1111  */
1112 static int
1113 vpbe_display_g_dv_timings(struct file *file, void *priv,
1114                                 struct v4l2_dv_timings *dv_timings)
1115 {
1116         struct vpbe_layer *layer = video_drvdata(file);
1117         struct vpbe_device *vpbe_dev = layer->disp_dev->vpbe_dev;
1118 
1119         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1120 
1121         /* Get the given standard in the encoder */
1122 
1123         if (vpbe_dev->current_timings.timings_type &
1124                                 VPBE_ENC_DV_TIMINGS) {
1125                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1126         } else {
1127                 return -EINVAL;
1128         }
1129 
1130         return 0;
1131 }
1132 
1133 /*
1134  * vpbe_display_open()
1135  * It creates object of file handle structure and stores it in private_data
1136  * member of filepointer
1137  */
1138 static int vpbe_display_open(struct file *file)
1139 {
1140         struct vpbe_layer *layer = video_drvdata(file);
1141         struct vpbe_display *disp_dev = layer->disp_dev;
1142         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1143         struct osd_state *osd_device = disp_dev->osd_device;
1144         int err;
1145 
1146         /* creating context for file descriptor */
1147         err = v4l2_fh_open(file);
1148         if (err) {
1149                 v4l2_err(&vpbe_dev->v4l2_dev, "v4l2_fh_open failed\n");
1150                 return err;
1151         }
1152 
1153         /* leaving if layer is already initialized */
1154         if (!v4l2_fh_is_singular_file(file))
1155                 return err;
1156 
1157         if (!layer->usrs) {
1158                 if (mutex_lock_interruptible(&layer->opslock))
1159                         return -ERESTARTSYS;
1160                 /* First claim the layer for this device */
1161                 err = osd_device->ops.request_layer(osd_device,
1162                                                 layer->layer_info.id);
1163                 mutex_unlock(&layer->opslock);
1164                 if (err < 0) {
1165                         /* Couldn't get layer */
1166                         v4l2_err(&vpbe_dev->v4l2_dev,
1167                                 "Display Manager failed to allocate layer\n");
1168                         v4l2_fh_release(file);
1169                         return -EINVAL;
1170                 }
1171         }
1172         /* Increment layer usrs counter */
1173         layer->usrs++;
1174         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1175                         "vpbe display device opened successfully\n");
1176         return 0;
1177 }
1178 
1179 /*
1180  * vpbe_display_release()
1181  * This function deletes buffer queue, frees the buffers and the davinci
1182  * display file * handle
1183  */
1184 static int vpbe_display_release(struct file *file)
1185 {
1186         struct vpbe_layer *layer = video_drvdata(file);
1187         struct osd_layer_config *cfg  = &layer->layer_info.config;
1188         struct vpbe_display *disp_dev = layer->disp_dev;
1189         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1190         struct osd_state *osd_device = disp_dev->osd_device;
1191 
1192         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1193 
1194         mutex_lock(&layer->opslock);
1195 
1196         osd_device->ops.disable_layer(osd_device,
1197                         layer->layer_info.id);
1198         /* Decrement layer usrs counter */
1199         layer->usrs--;
1200         /* If this file handle has initialize encoder device, reset it */
1201         if (!layer->usrs) {
1202                 if (cfg->pixfmt == PIXFMT_NV12) {
1203                         struct vpbe_layer *otherlayer;
1204                         otherlayer =
1205                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1206                         osd_device->ops.disable_layer(osd_device,
1207                                         otherlayer->layer_info.id);
1208                         osd_device->ops.release_layer(osd_device,
1209                                         otherlayer->layer_info.id);
1210                 }
1211                 osd_device->ops.disable_layer(osd_device,
1212                                 layer->layer_info.id);
1213                 osd_device->ops.release_layer(osd_device,
1214                                 layer->layer_info.id);
1215         }
1216 
1217         _vb2_fop_release(file, NULL);
1218         mutex_unlock(&layer->opslock);
1219 
1220         disp_dev->cbcr_ofst = 0;
1221 
1222         return 0;
1223 }
1224 
1225 /* vpbe capture ioctl operations */
1226 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1227         .vidioc_querycap         = vpbe_display_querycap,
1228         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1229         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1230         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1231         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1232 
1233         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
1234         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
1235         .vidioc_querybuf         = vb2_ioctl_querybuf,
1236         .vidioc_qbuf             = vb2_ioctl_qbuf,
1237         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
1238         .vidioc_streamon         = vb2_ioctl_streamon,
1239         .vidioc_streamoff        = vb2_ioctl_streamoff,
1240         .vidioc_expbuf           = vb2_ioctl_expbuf,
1241 
1242         .vidioc_g_pixelaspect    = vpbe_display_g_pixelaspect,
1243         .vidioc_g_selection      = vpbe_display_g_selection,
1244         .vidioc_s_selection      = vpbe_display_s_selection,
1245 
1246         .vidioc_s_std            = vpbe_display_s_std,
1247         .vidioc_g_std            = vpbe_display_g_std,
1248 
1249         .vidioc_enum_output      = vpbe_display_enum_output,
1250         .vidioc_s_output         = vpbe_display_s_output,
1251         .vidioc_g_output         = vpbe_display_g_output,
1252 
1253         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1254         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1255         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1256 };
1257 
1258 static const struct v4l2_file_operations vpbe_fops = {
1259         .owner = THIS_MODULE,
1260         .open = vpbe_display_open,
1261         .release = vpbe_display_release,
1262         .unlocked_ioctl = video_ioctl2,
1263         .mmap = vb2_fop_mmap,
1264         .poll =  vb2_fop_poll,
1265 };
1266 
1267 static int vpbe_device_get(struct device *dev, void *data)
1268 {
1269         struct platform_device *pdev = to_platform_device(dev);
1270         struct vpbe_display *vpbe_disp  = data;
1271 
1272         if (strcmp("vpbe_controller", pdev->name) == 0)
1273                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1274 
1275         if (strstr(pdev->name, "vpbe-osd"))
1276                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1277 
1278         return 0;
1279 }
1280 
1281 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1282                            struct platform_device *pdev)
1283 {
1284         struct vpbe_layer *vpbe_display_layer = NULL;
1285         struct video_device *vbd = NULL;
1286 
1287         /* Allocate memory for four plane display objects */
1288         disp_dev->dev[i] = kzalloc(sizeof(*disp_dev->dev[i]), GFP_KERNEL);
1289         if (!disp_dev->dev[i])
1290                 return  -ENOMEM;
1291 
1292         spin_lock_init(&disp_dev->dev[i]->irqlock);
1293         mutex_init(&disp_dev->dev[i]->opslock);
1294 
1295         /* Get the pointer to the layer object */
1296         vpbe_display_layer = disp_dev->dev[i];
1297         vbd = &vpbe_display_layer->video_dev;
1298         /* Initialize field of video device */
1299         vbd->release    = video_device_release_empty;
1300         vbd->fops       = &vpbe_fops;
1301         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1302         vbd->minor      = -1;
1303         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1304         vbd->lock       = &vpbe_display_layer->opslock;
1305         vbd->vfl_dir    = VFL_DIR_TX;
1306         vbd->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
1307 
1308         if (disp_dev->vpbe_dev->current_timings.timings_type &
1309                         VPBE_ENC_STD)
1310                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1311 
1312         snprintf(vbd->name, sizeof(vbd->name),
1313                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1314                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1315                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1316                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1317 
1318         vpbe_display_layer->device_id = i;
1319 
1320         vpbe_display_layer->layer_info.id =
1321                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1322 
1323 
1324         return 0;
1325 }
1326 
1327 static int register_device(struct vpbe_layer *vpbe_display_layer,
1328                            struct vpbe_display *disp_dev,
1329                            struct platform_device *pdev)
1330 {
1331         int err;
1332 
1333         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1334                   "Trying to register VPBE display device.\n");
1335         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1336                   "layer=%p,layer->video_dev=%p\n",
1337                   vpbe_display_layer,
1338                   &vpbe_display_layer->video_dev);
1339 
1340         vpbe_display_layer->video_dev.queue = &vpbe_display_layer->buffer_queue;
1341         err = video_register_device(&vpbe_display_layer->video_dev,
1342                                     VFL_TYPE_GRABBER,
1343                                     -1);
1344         if (err)
1345                 return -ENODEV;
1346 
1347         vpbe_display_layer->disp_dev = disp_dev;
1348         /* set the driver data in platform device */
1349         platform_set_drvdata(pdev, disp_dev);
1350         video_set_drvdata(&vpbe_display_layer->video_dev,
1351                           vpbe_display_layer);
1352 
1353         return 0;
1354 }
1355 
1356 
1357 
1358 /*
1359  * vpbe_display_probe()
1360  * This function creates device entries by register itself to the V4L2 driver
1361  * and initializes fields of each layer objects
1362  */
1363 static int vpbe_display_probe(struct platform_device *pdev)
1364 {
1365         struct vpbe_display *disp_dev;
1366         struct v4l2_device *v4l2_dev;
1367         struct resource *res = NULL;
1368         struct vb2_queue *q;
1369         int k;
1370         int i;
1371         int err;
1372         int irq;
1373 
1374         printk(KERN_DEBUG "vpbe_display_probe\n");
1375         /* Allocate memory for vpbe_display */
1376         disp_dev = devm_kzalloc(&pdev->dev, sizeof(*disp_dev), GFP_KERNEL);
1377         if (!disp_dev)
1378                 return -ENOMEM;
1379 
1380         spin_lock_init(&disp_dev->dma_queue_lock);
1381         /*
1382          * Scan all the platform devices to find the vpbe
1383          * controller device and get the vpbe_dev object
1384          */
1385         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1386                         vpbe_device_get);
1387         if (err < 0)
1388                 return err;
1389 
1390         v4l2_dev = &disp_dev->vpbe_dev->v4l2_dev;
1391         /* Initialize the vpbe display controller */
1392         if (disp_dev->vpbe_dev->ops.initialize) {
1393                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1394                                                          disp_dev->vpbe_dev);
1395                 if (err) {
1396                         v4l2_err(v4l2_dev, "Error initing vpbe\n");
1397                         err = -ENOMEM;
1398                         goto probe_out;
1399                 }
1400         }
1401 
1402         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1403                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1404                         err = -ENODEV;
1405                         goto probe_out;
1406                 }
1407         }
1408 
1409         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1410         if (!res) {
1411                 v4l2_err(v4l2_dev, "Unable to get VENC interrupt resource\n");
1412                 err = -ENODEV;
1413                 goto probe_out;
1414         }
1415 
1416         irq = res->start;
1417         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
1418                                VPBE_DISPLAY_DRIVER, disp_dev);
1419         if (err) {
1420                 v4l2_err(v4l2_dev, "VPBE IRQ request failed\n");
1421                 goto probe_out;
1422         }
1423 
1424         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1425                 /* initialize vb2 queue */
1426                 q = &disp_dev->dev[i]->buffer_queue;
1427                 memset(q, 0, sizeof(*q));
1428                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1429                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1430                 q->drv_priv = disp_dev->dev[i];
1431                 q->ops = &video_qops;
1432                 q->mem_ops = &vb2_dma_contig_memops;
1433                 q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1434                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1435                 q->min_buffers_needed = 1;
1436                 q->lock = &disp_dev->dev[i]->opslock;
1437                 q->dev = disp_dev->vpbe_dev->pdev;
1438                 err = vb2_queue_init(q);
1439                 if (err) {
1440                         v4l2_err(v4l2_dev, "vb2_queue_init() failed\n");
1441                         goto probe_out;
1442                 }
1443 
1444                 INIT_LIST_HEAD(&disp_dev->dev[i]->dma_queue);
1445 
1446                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1447                         err = -ENODEV;
1448                         goto probe_out;
1449                 }
1450         }
1451 
1452         v4l2_dbg(1, debug, v4l2_dev,
1453                  "Successfully completed the probing of vpbe v4l2 device\n");
1454 
1455         return 0;
1456 
1457 probe_out:
1458         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1459                 /* Unregister video device */
1460                 if (disp_dev->dev[k]) {
1461                         video_unregister_device(&disp_dev->dev[k]->video_dev);
1462                         kfree(disp_dev->dev[k]);
1463                 }
1464         }
1465         return err;
1466 }
1467 
1468 /*
1469  * vpbe_display_remove()
1470  * It un-register hardware layer from V4L2 driver
1471  */
1472 static int vpbe_display_remove(struct platform_device *pdev)
1473 {
1474         struct vpbe_layer *vpbe_display_layer;
1475         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1476         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1477         int i;
1478 
1479         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1480 
1481         /* deinitialize the vpbe display controller */
1482         if (vpbe_dev->ops.deinitialize)
1483                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1484         /* un-register device */
1485         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1486                 /* Get the pointer to the layer object */
1487                 vpbe_display_layer = disp_dev->dev[i];
1488                 /* Unregister video device */
1489                 video_unregister_device(&vpbe_display_layer->video_dev);
1490 
1491         }
1492         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1493                 kfree(disp_dev->dev[i]);
1494                 disp_dev->dev[i] = NULL;
1495         }
1496 
1497         return 0;
1498 }
1499 
1500 static struct platform_driver vpbe_display_driver = {
1501         .driver = {
1502                 .name = VPBE_DISPLAY_DRIVER,
1503                 .bus = &platform_bus_type,
1504         },
1505         .probe = vpbe_display_probe,
1506         .remove = vpbe_display_remove,
1507 };
1508 
1509 module_platform_driver(vpbe_display_driver);
1510 
1511 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1512 MODULE_LICENSE("GPL");
1513 MODULE_AUTHOR("Texas Instruments");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/platform/davinci/vpbe_display.c

DEFINITIONS
