Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/media/platform/davinci/vpbe_display.c

  1 /*
  2  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
  3  *
  4  * This program is free software; you can redistribute it and/or
  5  * modify it under the terms of the GNU General Public License as
  6  * published by the Free Software Foundation version 2.
  7  *
  8  * This program is distributed WITHOUT ANY WARRANTY of any
  9  * kind, whether express or implied; without even the implied warranty
 10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11  * GNU General Public License for more details.
 12  */
 13 #include <linux/kernel.h>
 14 #include <linux/init.h>
 15 #include <linux/module.h>
 16 #include <linux/errno.h>
 17 #include <linux/interrupt.h>
 18 #include <linux/string.h>
 19 #include <linux/wait.h>
 20 #include <linux/time.h>
 21 #include <linux/platform_device.h>
 22 #include <linux/irq.h>
 23 #include <linux/mm.h>
 24 #include <linux/mutex.h>
 25 #include <linux/videodev2.h>
 26 #include <linux/slab.h>
 27 
 28 #include <asm/pgtable.h>
 29 #include <mach/cputype.h>
 30 
 31 #include <media/v4l2-dev.h>
 32 #include <media/v4l2-common.h>
 33 #include <media/v4l2-ioctl.h>
 34 #include <media/v4l2-device.h>
 35 #include <media/davinci/vpbe_display.h>
 36 #include <media/davinci/vpbe_types.h>
 37 #include <media/davinci/vpbe.h>
 38 #include <media/davinci/vpbe_venc.h>
 39 #include <media/davinci/vpbe_osd.h>
 40 #include "vpbe_venc_regs.h"
 41 
 42 #define VPBE_DISPLAY_DRIVER "vpbe-v4l2"
 43 
 44 static int debug;
 45 
 46 #define VPBE_DEFAULT_NUM_BUFS 3
 47 
 48 module_param(debug, int, 0644);
 49 
 50 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
 51                         struct vpbe_layer *layer);
 52 
 53 static int venc_is_second_field(struct vpbe_display *disp_dev)
 54 {
 55         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
 56         int ret;
 57         int val;
 58 
 59         ret = v4l2_subdev_call(vpbe_dev->venc,
 60                                core,
 61                                ioctl,
 62                                VENC_GET_FLD,
 63                                &val);
 64         if (ret < 0) {
 65                 v4l2_err(&vpbe_dev->v4l2_dev,
 66                          "Error in getting Field ID 0\n");
 67         }
 68         return val;
 69 }
 70 
 71 static void vpbe_isr_even_field(struct vpbe_display *disp_obj,
 72                                 struct vpbe_layer *layer)
 73 {
 74         struct timespec timevalue;
 75 
 76         if (layer->cur_frm == layer->next_frm)
 77                 return;
 78         ktime_get_ts(&timevalue);
 79         layer->cur_frm->vb.v4l2_buf.timestamp.tv_sec =
 80                 timevalue.tv_sec;
 81         layer->cur_frm->vb.v4l2_buf.timestamp.tv_usec =
 82                 timevalue.tv_nsec / NSEC_PER_USEC;
 83         vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_DONE);
 84         /* Make cur_frm pointing to next_frm */
 85         layer->cur_frm = layer->next_frm;
 86 }
 87 
 88 static void vpbe_isr_odd_field(struct vpbe_display *disp_obj,
 89                                 struct vpbe_layer *layer)
 90 {
 91         struct osd_state *osd_device = disp_obj->osd_device;
 92         unsigned long addr;
 93 
 94         spin_lock(&disp_obj->dma_queue_lock);
 95         if (list_empty(&layer->dma_queue) ||
 96                 (layer->cur_frm != layer->next_frm)) {
 97                 spin_unlock(&disp_obj->dma_queue_lock);
 98                 return;
 99         }
100         /*
101          * one field is displayed configure
102          * the next frame if it is available
103          * otherwise hold on current frame
104          * Get next from the buffer queue
105          */
106         layer->next_frm = list_entry(layer->dma_queue.next,
107                           struct  vpbe_disp_buffer, list);
108         /* Remove that from the buffer queue */
109         list_del(&layer->next_frm->list);
110         spin_unlock(&disp_obj->dma_queue_lock);
111         /* Mark state of the frame to active */
112         layer->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
113         addr = vb2_dma_contig_plane_dma_addr(&layer->next_frm->vb, 0);
114         osd_device->ops.start_layer(osd_device,
115                         layer->layer_info.id,
116                         addr,
117                         disp_obj->cbcr_ofst);
118 }
119 
120 /* interrupt service routine */
121 static irqreturn_t venc_isr(int irq, void *arg)
122 {
123         struct vpbe_display *disp_dev = (struct vpbe_display *)arg;
124         struct vpbe_layer *layer;
125         static unsigned last_event;
126         unsigned event = 0;
127         int fid;
128         int i;
129 
130         if ((NULL == arg) || (NULL == disp_dev->dev[0]))
131                 return IRQ_HANDLED;
132 
133         if (venc_is_second_field(disp_dev))
134                 event |= VENC_SECOND_FIELD;
135         else
136                 event |= VENC_FIRST_FIELD;
137 
138         if (event == (last_event & ~VENC_END_OF_FRAME)) {
139                 /*
140                 * If the display is non-interlaced, then we need to flag the
141                 * end-of-frame event at every interrupt regardless of the
142                 * value of the FIDST bit.  We can conclude that the display is
143                 * non-interlaced if the value of the FIDST bit is unchanged
144                 * from the previous interrupt.
145                 */
146                 event |= VENC_END_OF_FRAME;
147         } else if (event == VENC_SECOND_FIELD) {
148                 /* end-of-frame for interlaced display */
149                 event |= VENC_END_OF_FRAME;
150         }
151         last_event = event;
152 
153         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
154                 layer = disp_dev->dev[i];
155                 /* If streaming is started in this layer */
156                 if (!layer->started)
157                         continue;
158 
159                 if (layer->layer_first_int) {
160                         layer->layer_first_int = 0;
161                         continue;
162                 }
163                 /* Check the field format */
164                 if ((V4L2_FIELD_NONE == layer->pix_fmt.field) &&
165                         (event & VENC_END_OF_FRAME)) {
166                         /* Progressive mode */
167 
168                         vpbe_isr_even_field(disp_dev, layer);
169                         vpbe_isr_odd_field(disp_dev, layer);
170                 } else {
171                 /* Interlaced mode */
172 
173                         layer->field_id ^= 1;
174                         if (event & VENC_FIRST_FIELD)
175                                 fid = 0;
176                         else
177                                 fid = 1;
178 
179                         /*
180                         * If field id does not match with store
181                         * field id
182                         */
183                         if (fid != layer->field_id) {
184                                 /* Make them in sync */
185                                 layer->field_id = fid;
186                                 continue;
187                         }
188                         /*
189                         * device field id and local field id are
190                         * in sync. If this is even field
191                         */
192                         if (0 == fid)
193                                 vpbe_isr_even_field(disp_dev, layer);
194                         else  /* odd field */
195                                 vpbe_isr_odd_field(disp_dev, layer);
196                 }
197         }
198 
199         return IRQ_HANDLED;
200 }
201 
202 /*
203  * vpbe_buffer_prepare()
204  * This is the callback function called from vb2_qbuf() function
205  * the buffer is prepared and user space virtual address is converted into
206  * physical address
207  */
208 static int vpbe_buffer_prepare(struct vb2_buffer *vb)
209 {
210         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
211         struct vb2_queue *q = vb->vb2_queue;
212         struct vpbe_layer *layer = fh->layer;
213         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
214         unsigned long addr;
215 
216         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
217                                 "vpbe_buffer_prepare\n");
218 
219         if (vb->state != VB2_BUF_STATE_ACTIVE &&
220                 vb->state != VB2_BUF_STATE_PREPARED) {
221                 vb2_set_plane_payload(vb, 0, layer->pix_fmt.sizeimage);
222                 if (vb2_plane_vaddr(vb, 0) &&
223                 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
224                         return -EINVAL;
225 
226                 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
227                 if (q->streaming) {
228                         if (!IS_ALIGNED(addr, 8)) {
229                                 v4l2_err(&vpbe_dev->v4l2_dev,
230                                         "buffer_prepare:offset is \
231                                         not aligned to 32 bytes\n");
232                                 return -EINVAL;
233                         }
234                 }
235         }
236         return 0;
237 }
238 
239 /*
240  * vpbe_buffer_setup()
241  * This function allocates memory for the buffers
242  */
243 static int
244 vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
245                         unsigned int *nbuffers, unsigned int *nplanes,
246                         unsigned int sizes[], void *alloc_ctxs[])
247 
248 {
249         /* Get the file handle object and layer object */
250         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
251         struct vpbe_layer *layer = fh->layer;
252         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
253 
254         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
255 
256         /* Store number of buffers allocated in numbuffer member */
257         if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
258                 *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
259 
260         *nplanes = 1;
261         sizes[0] = layer->pix_fmt.sizeimage;
262         alloc_ctxs[0] = layer->alloc_ctx;
263 
264         return 0;
265 }
266 
267 /*
268  * vpbe_buffer_queue()
269  * This function adds the buffer to DMA queue
270  */
271 static void vpbe_buffer_queue(struct vb2_buffer *vb)
272 {
273         /* Get the file handle object and layer object */
274         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
275         struct vpbe_disp_buffer *buf = container_of(vb,
276                                 struct vpbe_disp_buffer, vb);
277         struct vpbe_layer *layer = fh->layer;
278         struct vpbe_display *disp = fh->disp_dev;
279         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
280         unsigned long flags;
281 
282         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
283                         "vpbe_buffer_queue\n");
284 
285         /* add the buffer to the DMA queue */
286         spin_lock_irqsave(&disp->dma_queue_lock, flags);
287         list_add_tail(&buf->list, &layer->dma_queue);
288         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
289 }
290 
291 /*
292  * vpbe_buf_cleanup()
293  * This function is called from the vb2 layer to free memory allocated to
294  * the buffers
295  */
296 static void vpbe_buf_cleanup(struct vb2_buffer *vb)
297 {
298         /* Get the file handle object and layer object */
299         struct vpbe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
300         struct vpbe_layer *layer = fh->layer;
301         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
302         struct vpbe_disp_buffer *buf = container_of(vb,
303                                         struct vpbe_disp_buffer, vb);
304         unsigned long flags;
305 
306         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
307                         "vpbe_buf_cleanup\n");
308 
309         spin_lock_irqsave(&layer->irqlock, flags);
310         if (vb->state == VB2_BUF_STATE_ACTIVE)
311                 list_del_init(&buf->list);
312         spin_unlock_irqrestore(&layer->irqlock, flags);
313 }
314 
315 static void vpbe_wait_prepare(struct vb2_queue *vq)
316 {
317         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
318         struct vpbe_layer *layer = fh->layer;
319 
320         mutex_unlock(&layer->opslock);
321 }
322 
323 static void vpbe_wait_finish(struct vb2_queue *vq)
324 {
325         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
326         struct vpbe_layer *layer = fh->layer;
327 
328         mutex_lock(&layer->opslock);
329 }
330 
331 static int vpbe_buffer_init(struct vb2_buffer *vb)
332 {
333         struct vpbe_disp_buffer *buf = container_of(vb,
334                                         struct vpbe_disp_buffer, vb);
335 
336         INIT_LIST_HEAD(&buf->list);
337         return 0;
338 }
339 
340 static int vpbe_start_streaming(struct vb2_queue *vq, unsigned int count)
341 {
342         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
343         struct vpbe_layer *layer = fh->layer;
344         int ret;
345 
346         /* Get the next frame from the buffer queue */
347         layer->next_frm = layer->cur_frm = list_entry(layer->dma_queue.next,
348                                 struct vpbe_disp_buffer, list);
349         /* Remove buffer from the buffer queue */
350         list_del(&layer->cur_frm->list);
351         /* Mark state of the current frame to active */
352         layer->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
353         /* Initialize field_id and started member */
354         layer->field_id = 0;
355 
356         /* Set parameters in OSD and VENC */
357         ret = vpbe_set_osd_display_params(fh->disp_dev, layer);
358         if (ret < 0) {
359                 struct vpbe_disp_buffer *buf, *tmp;
360 
361                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_QUEUED);
362                 list_for_each_entry_safe(buf, tmp, &layer->dma_queue, list) {
363                         list_del(&buf->list);
364                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
365                 }
366 
367                 return ret;
368         }
369 
370         /*
371          * if request format is yuv420 semiplanar, need to
372          * enable both video windows
373          */
374         layer->started = 1;
375         layer->layer_first_int = 1;
376 
377         return ret;
378 }
379 
380 static void vpbe_stop_streaming(struct vb2_queue *vq)
381 {
382         struct vpbe_fh *fh = vb2_get_drv_priv(vq);
383         struct vpbe_layer *layer = fh->layer;
384         struct vpbe_display *disp = fh->disp_dev;
385         unsigned long flags;
386 
387         if (!vb2_is_streaming(vq))
388                 return;
389 
390         /* release all active buffers */
391         spin_lock_irqsave(&disp->dma_queue_lock, flags);
392         if (layer->cur_frm == layer->next_frm) {
393                 vb2_buffer_done(&layer->cur_frm->vb, VB2_BUF_STATE_ERROR);
394         } else {
395                 if (layer->cur_frm != NULL)
396                         vb2_buffer_done(&layer->cur_frm->vb,
397                                         VB2_BUF_STATE_ERROR);
398                 if (layer->next_frm != NULL)
399                         vb2_buffer_done(&layer->next_frm->vb,
400                                         VB2_BUF_STATE_ERROR);
401         }
402 
403         while (!list_empty(&layer->dma_queue)) {
404                 layer->next_frm = list_entry(layer->dma_queue.next,
405                                                 struct vpbe_disp_buffer, list);
406                 list_del(&layer->next_frm->list);
407                 vb2_buffer_done(&layer->next_frm->vb, VB2_BUF_STATE_ERROR);
408         }
409         spin_unlock_irqrestore(&disp->dma_queue_lock, flags);
410 }
411 
412 static struct vb2_ops video_qops = {
413         .queue_setup = vpbe_buffer_queue_setup,
414         .wait_prepare = vpbe_wait_prepare,
415         .wait_finish = vpbe_wait_finish,
416         .buf_init = vpbe_buffer_init,
417         .buf_prepare = vpbe_buffer_prepare,
418         .start_streaming = vpbe_start_streaming,
419         .stop_streaming = vpbe_stop_streaming,
420         .buf_cleanup = vpbe_buf_cleanup,
421         .buf_queue = vpbe_buffer_queue,
422 };
423 
424 static
425 struct vpbe_layer*
426 _vpbe_display_get_other_win_layer(struct vpbe_display *disp_dev,
427                         struct vpbe_layer *layer)
428 {
429         enum vpbe_display_device_id thiswin, otherwin;
430         thiswin = layer->device_id;
431 
432         otherwin = (thiswin == VPBE_DISPLAY_DEVICE_0) ?
433         VPBE_DISPLAY_DEVICE_1 : VPBE_DISPLAY_DEVICE_0;
434         return disp_dev->dev[otherwin];
435 }
436 
437 static int vpbe_set_osd_display_params(struct vpbe_display *disp_dev,
438                         struct vpbe_layer *layer)
439 {
440         struct osd_layer_config *cfg  = &layer->layer_info.config;
441         struct osd_state *osd_device = disp_dev->osd_device;
442         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
443         unsigned long addr;
444         int ret;
445 
446         addr = vb2_dma_contig_plane_dma_addr(&layer->cur_frm->vb, 0);
447         /* Set address in the display registers */
448         osd_device->ops.start_layer(osd_device,
449                                     layer->layer_info.id,
450                                     addr,
451                                     disp_dev->cbcr_ofst);
452 
453         ret = osd_device->ops.enable_layer(osd_device,
454                                 layer->layer_info.id, 0);
455         if (ret < 0) {
456                 v4l2_err(&vpbe_dev->v4l2_dev,
457                         "Error in enabling osd window layer 0\n");
458                 return -1;
459         }
460 
461         /* Enable the window */
462         layer->layer_info.enable = 1;
463         if (cfg->pixfmt == PIXFMT_NV12) {
464                 struct vpbe_layer *otherlayer =
465                         _vpbe_display_get_other_win_layer(disp_dev, layer);
466 
467                 ret = osd_device->ops.enable_layer(osd_device,
468                                 otherlayer->layer_info.id, 1);
469                 if (ret < 0) {
470                         v4l2_err(&vpbe_dev->v4l2_dev,
471                                 "Error in enabling osd window layer 1\n");
472                         return -1;
473                 }
474                 otherlayer->layer_info.enable = 1;
475         }
476         return 0;
477 }
478 
479 static void
480 vpbe_disp_calculate_scale_factor(struct vpbe_display *disp_dev,
481                         struct vpbe_layer *layer,
482                         int expected_xsize, int expected_ysize)
483 {
484         struct display_layer_info *layer_info = &layer->layer_info;
485         struct v4l2_pix_format *pixfmt = &layer->pix_fmt;
486         struct osd_layer_config *cfg  = &layer->layer_info.config;
487         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
488         int calculated_xsize;
489         int h_exp = 0;
490         int v_exp = 0;
491         int h_scale;
492         int v_scale;
493 
494         v4l2_std_id standard_id = vpbe_dev->current_timings.std_id;
495 
496         /*
497          * Application initially set the image format. Current display
498          * size is obtained from the vpbe display controller. expected_xsize
499          * and expected_ysize are set through S_CROP ioctl. Based on this,
500          * driver will calculate the scale factors for vertical and
501          * horizontal direction so that the image is displayed scaled
502          * and expanded. Application uses expansion to display the image
503          * in a square pixel. Otherwise it is displayed using displays
504          * pixel aspect ratio.It is expected that application chooses
505          * the crop coordinates for cropped or scaled display. if crop
506          * size is less than the image size, it is displayed cropped or
507          * it is displayed scaled and/or expanded.
508          *
509          * to begin with, set the crop window same as expected. Later we
510          * will override with scaled window size
511          */
512 
513         cfg->xsize = pixfmt->width;
514         cfg->ysize = pixfmt->height;
515         layer_info->h_zoom = ZOOM_X1;   /* no horizontal zoom */
516         layer_info->v_zoom = ZOOM_X1;   /* no horizontal zoom */
517         layer_info->h_exp = H_EXP_OFF;  /* no horizontal zoom */
518         layer_info->v_exp = V_EXP_OFF;  /* no horizontal zoom */
519 
520         if (pixfmt->width < expected_xsize) {
521                 h_scale = vpbe_dev->current_timings.xres / pixfmt->width;
522                 if (h_scale < 2)
523                         h_scale = 1;
524                 else if (h_scale >= 4)
525                         h_scale = 4;
526                 else
527                         h_scale = 2;
528                 cfg->xsize *= h_scale;
529                 if (cfg->xsize < expected_xsize) {
530                         if ((standard_id & V4L2_STD_525_60) ||
531                         (standard_id & V4L2_STD_625_50)) {
532                                 calculated_xsize = (cfg->xsize *
533                                         VPBE_DISPLAY_H_EXP_RATIO_N) /
534                                         VPBE_DISPLAY_H_EXP_RATIO_D;
535                                 if (calculated_xsize <= expected_xsize) {
536                                         h_exp = 1;
537                                         cfg->xsize = calculated_xsize;
538                                 }
539                         }
540                 }
541                 if (h_scale == 2)
542                         layer_info->h_zoom = ZOOM_X2;
543                 else if (h_scale == 4)
544                         layer_info->h_zoom = ZOOM_X4;
545                 if (h_exp)
546                         layer_info->h_exp = H_EXP_9_OVER_8;
547         } else {
548                 /* no scaling, only cropping. Set display area to crop area */
549                 cfg->xsize = expected_xsize;
550         }
551 
552         if (pixfmt->height < expected_ysize) {
553                 v_scale = expected_ysize / pixfmt->height;
554                 if (v_scale < 2)
555                         v_scale = 1;
556                 else if (v_scale >= 4)
557                         v_scale = 4;
558                 else
559                         v_scale = 2;
560                 cfg->ysize *= v_scale;
561                 if (cfg->ysize < expected_ysize) {
562                         if ((standard_id & V4L2_STD_625_50)) {
563                                 calculated_xsize = (cfg->ysize *
564                                         VPBE_DISPLAY_V_EXP_RATIO_N) /
565                                         VPBE_DISPLAY_V_EXP_RATIO_D;
566                                 if (calculated_xsize <= expected_ysize) {
567                                         v_exp = 1;
568                                         cfg->ysize = calculated_xsize;
569                                 }
570                         }
571                 }
572                 if (v_scale == 2)
573                         layer_info->v_zoom = ZOOM_X2;
574                 else if (v_scale == 4)
575                         layer_info->v_zoom = ZOOM_X4;
576                 if (v_exp)
577                         layer_info->h_exp = V_EXP_6_OVER_5;
578         } else {
579                 /* no scaling, only cropping. Set display area to crop area */
580                 cfg->ysize = expected_ysize;
581         }
582         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
583                 "crop display xsize = %d, ysize = %d\n",
584                 cfg->xsize, cfg->ysize);
585 }
586 
587 static void vpbe_disp_adj_position(struct vpbe_display *disp_dev,
588                         struct vpbe_layer *layer,
589                         int top, int left)
590 {
591         struct osd_layer_config *cfg = &layer->layer_info.config;
592         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
593 
594         cfg->xpos = min((unsigned int)left,
595                         vpbe_dev->current_timings.xres - cfg->xsize);
596         cfg->ypos = min((unsigned int)top,
597                         vpbe_dev->current_timings.yres - cfg->ysize);
598 
599         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
600                 "new xpos = %d, ypos = %d\n",
601                 cfg->xpos, cfg->ypos);
602 }
603 
604 static void vpbe_disp_check_window_params(struct vpbe_display *disp_dev,
605                         struct v4l2_rect *c)
606 {
607         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
608 
609         if ((c->width == 0) ||
610           ((c->width + c->left) > vpbe_dev->current_timings.xres))
611                 c->width = vpbe_dev->current_timings.xres - c->left;
612 
613         if ((c->height == 0) || ((c->height + c->top) >
614           vpbe_dev->current_timings.yres))
615                 c->height = vpbe_dev->current_timings.yres - c->top;
616 
617         /* window height must be even for interlaced display */
618         if (vpbe_dev->current_timings.interlaced)
619                 c->height &= (~0x01);
620 
621 }
622 
623 /**
624  * vpbe_try_format()
625  * If user application provides width and height, and have bytesperline set
626  * to zero, driver calculates bytesperline and sizeimage based on hardware
627  * limits.
628  */
629 static int vpbe_try_format(struct vpbe_display *disp_dev,
630                         struct v4l2_pix_format *pixfmt, int check)
631 {
632         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
633         int min_height = 1;
634         int min_width = 32;
635         int max_height;
636         int max_width;
637         int bpp;
638 
639         if ((pixfmt->pixelformat != V4L2_PIX_FMT_UYVY) &&
640             (pixfmt->pixelformat != V4L2_PIX_FMT_NV12))
641                 /* choose default as V4L2_PIX_FMT_UYVY */
642                 pixfmt->pixelformat = V4L2_PIX_FMT_UYVY;
643 
644         /* Check the field format */
645         if ((pixfmt->field != V4L2_FIELD_INTERLACED) &&
646                 (pixfmt->field != V4L2_FIELD_NONE)) {
647                 if (vpbe_dev->current_timings.interlaced)
648                         pixfmt->field = V4L2_FIELD_INTERLACED;
649                 else
650                         pixfmt->field = V4L2_FIELD_NONE;
651         }
652 
653         if (pixfmt->field == V4L2_FIELD_INTERLACED)
654                 min_height = 2;
655 
656         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
657                 bpp = 1;
658         else
659                 bpp = 2;
660 
661         max_width = vpbe_dev->current_timings.xres;
662         max_height = vpbe_dev->current_timings.yres;
663 
664         min_width /= bpp;
665 
666         if (!pixfmt->width || (pixfmt->width < min_width) ||
667                 (pixfmt->width > max_width)) {
668                 pixfmt->width = vpbe_dev->current_timings.xres;
669         }
670 
671         if (!pixfmt->height || (pixfmt->height  < min_height) ||
672                 (pixfmt->height  > max_height)) {
673                 pixfmt->height = vpbe_dev->current_timings.yres;
674         }
675 
676         if (pixfmt->bytesperline < (pixfmt->width * bpp))
677                 pixfmt->bytesperline = pixfmt->width * bpp;
678 
679         /* Make the bytesperline 32 byte aligned */
680         pixfmt->bytesperline = ((pixfmt->width * bpp + 31) & ~31);
681 
682         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
683                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height +
684                                 (pixfmt->bytesperline * pixfmt->height >> 1);
685         else
686                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
687 
688         return 0;
689 }
690 
691 static int vpbe_display_querycap(struct file *file, void  *priv,
692                                struct v4l2_capability *cap)
693 {
694         struct vpbe_fh *fh = file->private_data;
695         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
696 
697         cap->version = VPBE_DISPLAY_VERSION_CODE;
698         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
699         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
700         snprintf(cap->driver, sizeof(cap->driver), "%s",
701                 dev_name(vpbe_dev->pdev));
702         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
703                  dev_name(vpbe_dev->pdev));
704         strlcpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
705 
706         return 0;
707 }
708 
709 static int vpbe_display_s_crop(struct file *file, void *priv,
710                              const struct v4l2_crop *crop)
711 {
712         struct vpbe_fh *fh = file->private_data;
713         struct vpbe_layer *layer = fh->layer;
714         struct vpbe_display *disp_dev = fh->disp_dev;
715         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
716         struct osd_layer_config *cfg = &layer->layer_info.config;
717         struct osd_state *osd_device = disp_dev->osd_device;
718         struct v4l2_rect rect = crop->c;
719         int ret;
720 
721         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
722                 "VIDIOC_S_CROP, layer id = %d\n", layer->device_id);
723 
724         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
725                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
726                 return -EINVAL;
727         }
728 
729         if (rect.top < 0)
730                 rect.top = 0;
731         if (rect.left < 0)
732                 rect.left = 0;
733 
734         vpbe_disp_check_window_params(disp_dev, &rect);
735 
736         osd_device->ops.get_layer_config(osd_device,
737                         layer->layer_info.id, cfg);
738 
739         vpbe_disp_calculate_scale_factor(disp_dev, layer,
740                                         rect.width,
741                                         rect.height);
742         vpbe_disp_adj_position(disp_dev, layer, rect.top,
743                                         rect.left);
744         ret = osd_device->ops.set_layer_config(osd_device,
745                                 layer->layer_info.id, cfg);
746         if (ret < 0) {
747                 v4l2_err(&vpbe_dev->v4l2_dev,
748                         "Error in set layer config:\n");
749                 return -EINVAL;
750         }
751 
752         /* apply zooming and h or v expansion */
753         osd_device->ops.set_zoom(osd_device,
754                         layer->layer_info.id,
755                         layer->layer_info.h_zoom,
756                         layer->layer_info.v_zoom);
757         ret = osd_device->ops.set_vid_expansion(osd_device,
758                         layer->layer_info.h_exp,
759                         layer->layer_info.v_exp);
760         if (ret < 0) {
761                 v4l2_err(&vpbe_dev->v4l2_dev,
762                 "Error in set vid expansion:\n");
763                 return -EINVAL;
764         }
765 
766         if ((layer->layer_info.h_zoom != ZOOM_X1) ||
767                 (layer->layer_info.v_zoom != ZOOM_X1) ||
768                 (layer->layer_info.h_exp != H_EXP_OFF) ||
769                 (layer->layer_info.v_exp != V_EXP_OFF))
770                 /* Enable expansion filter */
771                 osd_device->ops.set_interpolation_filter(osd_device, 1);
772         else
773                 osd_device->ops.set_interpolation_filter(osd_device, 0);
774 
775         return 0;
776 }
777 
778 static int vpbe_display_g_crop(struct file *file, void *priv,
779                              struct v4l2_crop *crop)
780 {
781         struct vpbe_fh *fh = file->private_data;
782         struct vpbe_layer *layer = fh->layer;
783         struct osd_layer_config *cfg = &layer->layer_info.config;
784         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
785         struct osd_state *osd_device = fh->disp_dev->osd_device;
786         struct v4l2_rect *rect = &crop->c;
787 
788         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
789                         "VIDIOC_G_CROP, layer id = %d\n",
790                         layer->device_id);
791 
792         if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
793                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buf type\n");
794                 return -EINVAL;
795         }
796         osd_device->ops.get_layer_config(osd_device,
797                                 layer->layer_info.id, cfg);
798         rect->top = cfg->ypos;
799         rect->left = cfg->xpos;
800         rect->width = cfg->xsize;
801         rect->height = cfg->ysize;
802 
803         return 0;
804 }
805 
806 static int vpbe_display_cropcap(struct file *file, void *priv,
807                               struct v4l2_cropcap *cropcap)
808 {
809         struct vpbe_fh *fh = file->private_data;
810         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
811 
812         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_CROPCAP ioctl\n");
813 
814         cropcap->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
815         cropcap->bounds.left = 0;
816         cropcap->bounds.top = 0;
817         cropcap->bounds.width = vpbe_dev->current_timings.xres;
818         cropcap->bounds.height = vpbe_dev->current_timings.yres;
819         cropcap->pixelaspect = vpbe_dev->current_timings.aspect;
820         cropcap->defrect = cropcap->bounds;
821         return 0;
822 }
823 
824 static int vpbe_display_g_fmt(struct file *file, void *priv,
825                                 struct v4l2_format *fmt)
826 {
827         struct vpbe_fh *fh = file->private_data;
828         struct vpbe_layer *layer = fh->layer;
829         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
830 
831         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
832                         "VIDIOC_G_FMT, layer id = %d\n",
833                         layer->device_id);
834 
835         /* If buffer type is video output */
836         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
837                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
838                 return -EINVAL;
839         }
840         /* Fill in the information about format */
841         fmt->fmt.pix = layer->pix_fmt;
842 
843         return 0;
844 }
845 
846 static int vpbe_display_enum_fmt(struct file *file, void  *priv,
847                                    struct v4l2_fmtdesc *fmt)
848 {
849         struct vpbe_fh *fh = file->private_data;
850         struct vpbe_layer *layer = fh->layer;
851         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
852         unsigned int index = 0;
853 
854         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
855                                 "VIDIOC_ENUM_FMT, layer id = %d\n",
856                                 layer->device_id);
857         if (fmt->index > 1) {
858                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid format index\n");
859                 return -EINVAL;
860         }
861 
862         /* Fill in the information about format */
863         index = fmt->index;
864         memset(fmt, 0, sizeof(*fmt));
865         fmt->index = index;
866         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
867         if (index == 0) {
868                 strcpy(fmt->description, "YUV 4:2:2 - UYVY");
869                 fmt->pixelformat = V4L2_PIX_FMT_UYVY;
870         } else {
871                 strcpy(fmt->description, "Y/CbCr 4:2:0");
872                 fmt->pixelformat = V4L2_PIX_FMT_NV12;
873         }
874 
875         return 0;
876 }
877 
878 static int vpbe_display_s_fmt(struct file *file, void *priv,
879                                 struct v4l2_format *fmt)
880 {
881         struct vpbe_fh *fh = file->private_data;
882         struct vpbe_layer *layer = fh->layer;
883         struct vpbe_display *disp_dev = fh->disp_dev;
884         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
885         struct osd_layer_config *cfg  = &layer->layer_info.config;
886         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
887         struct osd_state *osd_device = disp_dev->osd_device;
888         int ret;
889 
890         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
891                         "VIDIOC_S_FMT, layer id = %d\n",
892                         layer->device_id);
893 
894         /* If streaming is started, return error */
895         if (layer->started) {
896                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
897                 return -EBUSY;
898         }
899         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
900                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "invalid type\n");
901                 return -EINVAL;
902         }
903         /* Check for valid pixel format */
904         ret = vpbe_try_format(disp_dev, pixfmt, 1);
905         if (ret)
906                 return ret;
907 
908         /* YUV420 is requested, check availability of the
909         other video window */
910 
911         layer->pix_fmt = *pixfmt;
912         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12) {
913                 struct vpbe_layer *otherlayer;
914 
915                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev, layer);
916                 /* if other layer is available, only
917                  * claim it, do not configure it
918                  */
919                 ret = osd_device->ops.request_layer(osd_device,
920                                                     otherlayer->layer_info.id);
921                 if (ret < 0) {
922                         v4l2_err(&vpbe_dev->v4l2_dev,
923                                  "Display Manager failed to allocate layer\n");
924                         return -EBUSY;
925                 }
926         }
927 
928         /* Get osd layer config */
929         osd_device->ops.get_layer_config(osd_device,
930                         layer->layer_info.id, cfg);
931         /* Store the pixel format in the layer object */
932         cfg->xsize = pixfmt->width;
933         cfg->ysize = pixfmt->height;
934         cfg->line_length = pixfmt->bytesperline;
935         cfg->ypos = 0;
936         cfg->xpos = 0;
937         cfg->interlaced = vpbe_dev->current_timings.interlaced;
938 
939         if (V4L2_PIX_FMT_UYVY == pixfmt->pixelformat)
940                 cfg->pixfmt = PIXFMT_YCBCRI;
941 
942         /* Change of the default pixel format for both video windows */
943         if (V4L2_PIX_FMT_NV12 == pixfmt->pixelformat) {
944                 struct vpbe_layer *otherlayer;
945                 cfg->pixfmt = PIXFMT_NV12;
946                 otherlayer = _vpbe_display_get_other_win_layer(disp_dev,
947                                                                 layer);
948                 otherlayer->layer_info.config.pixfmt = PIXFMT_NV12;
949         }
950 
951         /* Set the layer config in the osd window */
952         ret = osd_device->ops.set_layer_config(osd_device,
953                                 layer->layer_info.id, cfg);
954         if (ret < 0) {
955                 v4l2_err(&vpbe_dev->v4l2_dev,
956                                 "Error in S_FMT params:\n");
957                 return -EINVAL;
958         }
959 
960         /* Readback and fill the local copy of current pix format */
961         osd_device->ops.get_layer_config(osd_device,
962                         layer->layer_info.id, cfg);
963 
964         return 0;
965 }
966 
967 static int vpbe_display_try_fmt(struct file *file, void *priv,
968                                   struct v4l2_format *fmt)
969 {
970         struct vpbe_fh *fh = file->private_data;
971         struct vpbe_display *disp_dev = fh->disp_dev;
972         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
973         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
974 
975         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_TRY_FMT\n");
976 
977         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != fmt->type) {
978                 v4l2_err(&vpbe_dev->v4l2_dev, "invalid type\n");
979                 return -EINVAL;
980         }
981 
982         /* Check for valid field format */
983         return  vpbe_try_format(disp_dev, pixfmt, 0);
984 
985 }
986 
987 /**
988  * vpbe_display_s_std - Set the given standard in the encoder
989  *
990  * Sets the standard if supported by the current encoder. Return the status.
991  * 0 - success & -EINVAL on error
992  */
993 static int vpbe_display_s_std(struct file *file, void *priv,
994                                 v4l2_std_id std_id)
995 {
996         struct vpbe_fh *fh = priv;
997         struct vpbe_layer *layer = fh->layer;
998         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
999         int ret;
1000 
1001         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_STD\n");
1002 
1003         /* If streaming is started, return error */
1004         if (layer->started) {
1005                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1006                 return -EBUSY;
1007         }
1008         if (NULL != vpbe_dev->ops.s_std) {
1009                 ret = vpbe_dev->ops.s_std(vpbe_dev, std_id);
1010                 if (ret) {
1011                         v4l2_err(&vpbe_dev->v4l2_dev,
1012                         "Failed to set standard for sub devices\n");
1013                         return -EINVAL;
1014                 }
1015         } else {
1016                 return -EINVAL;
1017         }
1018 
1019         return 0;
1020 }
1021 
1022 /**
1023  * vpbe_display_g_std - Get the standard in the current encoder
1024  *
1025  * Get the standard in the current encoder. Return the status. 0 - success
1026  * -EINVAL on error
1027  */
1028 static int vpbe_display_g_std(struct file *file, void *priv,
1029                                 v4l2_std_id *std_id)
1030 {
1031         struct vpbe_fh *fh = priv;
1032         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1033 
1034         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_STD\n");
1035 
1036         /* Get the standard from the current encoder */
1037         if (vpbe_dev->current_timings.timings_type & VPBE_ENC_STD) {
1038                 *std_id = vpbe_dev->current_timings.std_id;
1039                 return 0;
1040         }
1041 
1042         return -EINVAL;
1043 }
1044 
1045 /**
1046  * vpbe_display_enum_output - enumerate outputs
1047  *
1048  * Enumerates the outputs available at the vpbe display
1049  * returns the status, -EINVAL if end of output list
1050  */
1051 static int vpbe_display_enum_output(struct file *file, void *priv,
1052                                     struct v4l2_output *output)
1053 {
1054         struct vpbe_fh *fh = priv;
1055         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1056         int ret;
1057 
1058         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_OUTPUT\n");
1059 
1060         /* Enumerate outputs */
1061 
1062         if (NULL == vpbe_dev->ops.enum_outputs)
1063                 return -EINVAL;
1064 
1065         ret = vpbe_dev->ops.enum_outputs(vpbe_dev, output);
1066         if (ret) {
1067                 v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1068                         "Failed to enumerate outputs\n");
1069                 return -EINVAL;
1070         }
1071 
1072         return 0;
1073 }
1074 
1075 /**
1076  * vpbe_display_s_output - Set output to
1077  * the output specified by the index
1078  */
1079 static int vpbe_display_s_output(struct file *file, void *priv,
1080                                 unsigned int i)
1081 {
1082         struct vpbe_fh *fh = priv;
1083         struct vpbe_layer *layer = fh->layer;
1084         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1085         int ret;
1086 
1087         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_OUTPUT\n");
1088         /* If streaming is started, return error */
1089         if (layer->started) {
1090                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1091                 return -EBUSY;
1092         }
1093         if (NULL == vpbe_dev->ops.set_output)
1094                 return -EINVAL;
1095 
1096         ret = vpbe_dev->ops.set_output(vpbe_dev, i);
1097         if (ret) {
1098                 v4l2_err(&vpbe_dev->v4l2_dev,
1099                         "Failed to set output for sub devices\n");
1100                 return -EINVAL;
1101         }
1102 
1103         return 0;
1104 }
1105 
1106 /**
1107  * vpbe_display_g_output - Get output from subdevice
1108  * for a given by the index
1109  */
1110 static int vpbe_display_g_output(struct file *file, void *priv,
1111                                 unsigned int *i)
1112 {
1113         struct vpbe_fh *fh = priv;
1114         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1115 
1116         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_OUTPUT\n");
1117         /* Get the standard from the current encoder */
1118         *i = vpbe_dev->current_out_index;
1119 
1120         return 0;
1121 }
1122 
1123 /**
1124  * vpbe_display_enum_dv_timings - Enumerate the dv timings
1125  *
1126  * enum the timings in the current encoder. Return the status. 0 - success
1127  * -EINVAL on error
1128  */
1129 static int
1130 vpbe_display_enum_dv_timings(struct file *file, void *priv,
1131                         struct v4l2_enum_dv_timings *timings)
1132 {
1133         struct vpbe_fh *fh = priv;
1134         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1135         int ret;
1136 
1137         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_ENUM_DV_TIMINGS\n");
1138 
1139         /* Enumerate outputs */
1140         if (NULL == vpbe_dev->ops.enum_dv_timings)
1141                 return -EINVAL;
1142 
1143         ret = vpbe_dev->ops.enum_dv_timings(vpbe_dev, timings);
1144         if (ret) {
1145                 v4l2_err(&vpbe_dev->v4l2_dev,
1146                         "Failed to enumerate dv timings info\n");
1147                 return -EINVAL;
1148         }
1149 
1150         return 0;
1151 }
1152 
1153 /**
1154  * vpbe_display_s_dv_timings - Set the dv timings
1155  *
1156  * Set the timings in the current encoder. Return the status. 0 - success
1157  * -EINVAL on error
1158  */
1159 static int
1160 vpbe_display_s_dv_timings(struct file *file, void *priv,
1161                                 struct v4l2_dv_timings *timings)
1162 {
1163         struct vpbe_fh *fh = priv;
1164         struct vpbe_layer *layer = fh->layer;
1165         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1166         int ret;
1167 
1168         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_S_DV_TIMINGS\n");
1169 
1170 
1171         /* If streaming is started, return error */
1172         if (layer->started) {
1173                 v4l2_err(&vpbe_dev->v4l2_dev, "Streaming is started\n");
1174                 return -EBUSY;
1175         }
1176 
1177         /* Set the given standard in the encoder */
1178         if (!vpbe_dev->ops.s_dv_timings)
1179                 return -EINVAL;
1180 
1181         ret = vpbe_dev->ops.s_dv_timings(vpbe_dev, timings);
1182         if (ret) {
1183                 v4l2_err(&vpbe_dev->v4l2_dev,
1184                         "Failed to set the dv timings info\n");
1185                 return -EINVAL;
1186         }
1187 
1188         return 0;
1189 }
1190 
1191 /**
1192  * vpbe_display_g_dv_timings - Set the dv timings
1193  *
1194  * Get the timings in the current encoder. Return the status. 0 - success
1195  * -EINVAL on error
1196  */
1197 static int
1198 vpbe_display_g_dv_timings(struct file *file, void *priv,
1199                                 struct v4l2_dv_timings *dv_timings)
1200 {
1201         struct vpbe_fh *fh = priv;
1202         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1203 
1204         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_G_DV_TIMINGS\n");
1205 
1206         /* Get the given standard in the encoder */
1207 
1208         if (vpbe_dev->current_timings.timings_type &
1209                                 VPBE_ENC_DV_TIMINGS) {
1210                 *dv_timings = vpbe_dev->current_timings.dv_timings;
1211         } else {
1212                 return -EINVAL;
1213         }
1214 
1215         return 0;
1216 }
1217 
1218 static int vpbe_display_streamoff(struct file *file, void *priv,
1219                                 enum v4l2_buf_type buf_type)
1220 {
1221         struct vpbe_fh *fh = file->private_data;
1222         struct vpbe_layer *layer = fh->layer;
1223         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1224         struct osd_state *osd_device = fh->disp_dev->osd_device;
1225         int ret;
1226 
1227         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1228                         "VIDIOC_STREAMOFF,layer id = %d\n",
1229                         layer->device_id);
1230 
1231         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1232                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1233                 return -EINVAL;
1234         }
1235 
1236         /* If io is allowed for this file handle, return error */
1237         if (!fh->io_allowed) {
1238                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1239                 return -EACCES;
1240         }
1241 
1242         /* If streaming is not started, return error */
1243         if (!layer->started) {
1244                 v4l2_err(&vpbe_dev->v4l2_dev, "streaming not started in layer"
1245                         " id = %d\n", layer->device_id);
1246                 return -EINVAL;
1247         }
1248 
1249         osd_device->ops.disable_layer(osd_device,
1250                         layer->layer_info.id);
1251         layer->started = 0;
1252         ret = vb2_streamoff(&layer->buffer_queue, buf_type);
1253 
1254         return ret;
1255 }
1256 
1257 static int vpbe_display_streamon(struct file *file, void *priv,
1258                          enum v4l2_buf_type buf_type)
1259 {
1260         struct vpbe_fh *fh = file->private_data;
1261         struct vpbe_layer *layer = fh->layer;
1262         struct vpbe_display *disp_dev = fh->disp_dev;
1263         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1264         struct osd_state *osd_device = disp_dev->osd_device;
1265         int ret;
1266 
1267         osd_device->ops.disable_layer(osd_device,
1268                         layer->layer_info.id);
1269 
1270         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "VIDIOC_STREAMON, layerid=%d\n",
1271                                                 layer->device_id);
1272 
1273         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) {
1274                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1275                 return -EINVAL;
1276         }
1277 
1278         /* If file handle is not allowed IO, return error */
1279         if (!fh->io_allowed) {
1280                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1281                 return -EACCES;
1282         }
1283         /* If Streaming is already started, return error */
1284         if (layer->started) {
1285                 v4l2_err(&vpbe_dev->v4l2_dev, "layer is already streaming\n");
1286                 return -EBUSY;
1287         }
1288 
1289         /*
1290          * Call vb2_streamon to start streaming
1291          * in videobuf
1292          */
1293         ret = vb2_streamon(&layer->buffer_queue, buf_type);
1294         if (ret) {
1295                 v4l2_err(&vpbe_dev->v4l2_dev,
1296                 "error in vb2_streamon\n");
1297                 return ret;
1298         }
1299         return ret;
1300 }
1301 
1302 static int vpbe_display_dqbuf(struct file *file, void *priv,
1303                       struct v4l2_buffer *buf)
1304 {
1305         struct vpbe_fh *fh = file->private_data;
1306         struct vpbe_layer *layer = fh->layer;
1307         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1308         int ret;
1309 
1310         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1311                 "VIDIOC_DQBUF, layer id = %d\n",
1312                 layer->device_id);
1313 
1314         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1315                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1316                 return -EINVAL;
1317         }
1318         /* If this file handle is not allowed to do IO, return error */
1319         if (!fh->io_allowed) {
1320                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1321                 return -EACCES;
1322         }
1323         if (file->f_flags & O_NONBLOCK)
1324                 /* Call videobuf_dqbuf for non blocking mode */
1325                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 1);
1326         else
1327                 /* Call videobuf_dqbuf for blocking mode */
1328                 ret = vb2_dqbuf(&layer->buffer_queue, buf, 0);
1329 
1330         return ret;
1331 }
1332 
1333 static int vpbe_display_qbuf(struct file *file, void *priv,
1334                      struct v4l2_buffer *p)
1335 {
1336         struct vpbe_fh *fh = file->private_data;
1337         struct vpbe_layer *layer = fh->layer;
1338         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1339 
1340         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1341                 "VIDIOC_QBUF, layer id = %d\n",
1342                 layer->device_id);
1343 
1344         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) {
1345                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1346                 return -EINVAL;
1347         }
1348 
1349         /* If this file handle is not allowed to do IO, return error */
1350         if (!fh->io_allowed) {
1351                 v4l2_err(&vpbe_dev->v4l2_dev, "No io_allowed\n");
1352                 return -EACCES;
1353         }
1354 
1355         return vb2_qbuf(&layer->buffer_queue, p);
1356 }
1357 
1358 static int vpbe_display_querybuf(struct file *file, void *priv,
1359                          struct v4l2_buffer *buf)
1360 {
1361         struct vpbe_fh *fh = file->private_data;
1362         struct vpbe_layer *layer = fh->layer;
1363         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1364 
1365         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1366                 "VIDIOC_QUERYBUF, layer id = %d\n",
1367                 layer->device_id);
1368 
1369         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) {
1370                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1371                 return -EINVAL;
1372         }
1373         /* Call vb2_querybuf to get information */
1374         return vb2_querybuf(&layer->buffer_queue, buf);
1375 }
1376 
1377 static int vpbe_display_reqbufs(struct file *file, void *priv,
1378                         struct v4l2_requestbuffers *req_buf)
1379 {
1380         struct vpbe_fh *fh = file->private_data;
1381         struct vpbe_layer *layer = fh->layer;
1382         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1383         struct vb2_queue *q;
1384         int ret;
1385         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_reqbufs\n");
1386 
1387         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) {
1388                 v4l2_err(&vpbe_dev->v4l2_dev, "Invalid buffer type\n");
1389                 return -EINVAL;
1390         }
1391 
1392         /* If io users of the layer is not zero, return error */
1393         if (0 != layer->io_usrs) {
1394                 v4l2_err(&vpbe_dev->v4l2_dev, "not IO user\n");
1395                 return -EBUSY;
1396         }
1397         /* Initialize videobuf queue as per the buffer type */
1398         layer->alloc_ctx = vb2_dma_contig_init_ctx(vpbe_dev->pdev);
1399         if (IS_ERR(layer->alloc_ctx)) {
1400                 v4l2_err(&vpbe_dev->v4l2_dev, "Failed to get the context\n");
1401                 return PTR_ERR(layer->alloc_ctx);
1402         }
1403         q = &layer->buffer_queue;
1404         memset(q, 0, sizeof(*q));
1405         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1406         q->io_modes = VB2_MMAP | VB2_USERPTR;
1407         q->drv_priv = fh;
1408         q->ops = &video_qops;
1409         q->mem_ops = &vb2_dma_contig_memops;
1410         q->buf_struct_size = sizeof(struct vpbe_disp_buffer);
1411         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1412         q->min_buffers_needed = 1;
1413 
1414         ret = vb2_queue_init(q);
1415         if (ret) {
1416                 v4l2_err(&vpbe_dev->v4l2_dev, "vb2_queue_init() failed\n");
1417                 vb2_dma_contig_cleanup_ctx(layer->alloc_ctx);
1418                 return ret;
1419         }
1420         /* Set io allowed member of file handle to TRUE */
1421         fh->io_allowed = 1;
1422         /* Increment io usrs member of layer object to 1 */
1423         layer->io_usrs = 1;
1424         /* Store type of memory requested in layer object */
1425         layer->memory = req_buf->memory;
1426         /* Initialize buffer queue */
1427         INIT_LIST_HEAD(&layer->dma_queue);
1428         /* Allocate buffers */
1429         return vb2_reqbufs(q, req_buf);
1430 }
1431 
1432 /*
1433  * vpbe_display_mmap()
1434  * It is used to map kernel space buffers into user spaces
1435  */
1436 static int vpbe_display_mmap(struct file *filep, struct vm_area_struct *vma)
1437 {
1438         /* Get the layer object and file handle object */
1439         struct vpbe_fh *fh = filep->private_data;
1440         struct vpbe_layer *layer = fh->layer;
1441         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1442         int ret;
1443 
1444         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_mmap\n");
1445 
1446         if (mutex_lock_interruptible(&layer->opslock))
1447                 return -ERESTARTSYS;
1448         ret = vb2_mmap(&layer->buffer_queue, vma);
1449         mutex_unlock(&layer->opslock);
1450         return ret;
1451 }
1452 
1453 /* vpbe_display_poll(): It is used for select/poll system call
1454  */
1455 static unsigned int vpbe_display_poll(struct file *filep, poll_table *wait)
1456 {
1457         struct vpbe_fh *fh = filep->private_data;
1458         struct vpbe_layer *layer = fh->layer;
1459         struct vpbe_device *vpbe_dev = fh->disp_dev->vpbe_dev;
1460         unsigned int err = 0;
1461 
1462         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_poll\n");
1463         if (layer->started) {
1464                 mutex_lock(&layer->opslock);
1465                 err = vb2_poll(&layer->buffer_queue, filep, wait);
1466                 mutex_unlock(&layer->opslock);
1467         }
1468         return err;
1469 }
1470 
1471 /*
1472  * vpbe_display_open()
1473  * It creates object of file handle structure and stores it in private_data
1474  * member of filepointer
1475  */
1476 static int vpbe_display_open(struct file *file)
1477 {
1478         struct vpbe_fh *fh = NULL;
1479         struct vpbe_layer *layer = video_drvdata(file);
1480         struct video_device *vdev = video_devdata(file);
1481         struct vpbe_display *disp_dev = layer->disp_dev;
1482         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1483         struct osd_state *osd_device = disp_dev->osd_device;
1484         int err;
1485 
1486         /* Allocate memory for the file handle object */
1487         fh = kmalloc(sizeof(struct vpbe_fh), GFP_KERNEL);
1488         if (fh == NULL) {
1489                 v4l2_err(&vpbe_dev->v4l2_dev,
1490                         "unable to allocate memory for file handle object\n");
1491                 return -ENOMEM;
1492         }
1493         v4l2_fh_init(&fh->fh, vdev);
1494         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1495                         "vpbe display open plane = %d\n",
1496                         layer->device_id);
1497 
1498         /* store pointer to fh in private_data member of filep */
1499         file->private_data = fh;
1500         fh->layer = layer;
1501         fh->disp_dev = disp_dev;
1502 
1503         if (!layer->usrs) {
1504                 if (mutex_lock_interruptible(&layer->opslock))
1505                         return -ERESTARTSYS;
1506                 /* First claim the layer for this device */
1507                 err = osd_device->ops.request_layer(osd_device,
1508                                                 layer->layer_info.id);
1509                 mutex_unlock(&layer->opslock);
1510                 if (err < 0) {
1511                         /* Couldn't get layer */
1512                         v4l2_err(&vpbe_dev->v4l2_dev,
1513                                 "Display Manager failed to allocate layer\n");
1514                         kfree(fh);
1515                         return -EINVAL;
1516                 }
1517         }
1518         /* Increment layer usrs counter */
1519         layer->usrs++;
1520         /* Set io_allowed member to false */
1521         fh->io_allowed = 0;
1522         v4l2_fh_add(&fh->fh);
1523         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev,
1524                         "vpbe display device opened successfully\n");
1525         return 0;
1526 }
1527 
1528 /*
1529  * vpbe_display_release()
1530  * This function deletes buffer queue, frees the buffers and the davinci
1531  * display file * handle
1532  */
1533 static int vpbe_display_release(struct file *file)
1534 {
1535         /* Get the layer object and file handle object */
1536         struct vpbe_fh *fh = file->private_data;
1537         struct vpbe_layer *layer = fh->layer;
1538         struct osd_layer_config *cfg  = &layer->layer_info.config;
1539         struct vpbe_display *disp_dev = fh->disp_dev;
1540         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1541         struct osd_state *osd_device = disp_dev->osd_device;
1542 
1543         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_release\n");
1544 
1545         mutex_lock(&layer->opslock);
1546         /* if this instance is doing IO */
1547         if (fh->io_allowed) {
1548                 /* Reset io_usrs member of layer object */
1549                 layer->io_usrs = 0;
1550 
1551                 osd_device->ops.disable_layer(osd_device,
1552                                 layer->layer_info.id);
1553                 layer->started = 0;
1554                 /* Free buffers allocated */
1555                 vb2_queue_release(&layer->buffer_queue);
1556                 vb2_dma_contig_cleanup_ctx(&layer->buffer_queue);
1557         }
1558 
1559         /* Decrement layer usrs counter */
1560         layer->usrs--;
1561         /* If this file handle has initialize encoder device, reset it */
1562         if (!layer->usrs) {
1563                 if (cfg->pixfmt == PIXFMT_NV12) {
1564                         struct vpbe_layer *otherlayer;
1565                         otherlayer =
1566                         _vpbe_display_get_other_win_layer(disp_dev, layer);
1567                         osd_device->ops.disable_layer(osd_device,
1568                                         otherlayer->layer_info.id);
1569                         osd_device->ops.release_layer(osd_device,
1570                                         otherlayer->layer_info.id);
1571                 }
1572                 osd_device->ops.disable_layer(osd_device,
1573                                 layer->layer_info.id);
1574                 osd_device->ops.release_layer(osd_device,
1575                                 layer->layer_info.id);
1576         }
1577 
1578         v4l2_fh_del(&fh->fh);
1579         v4l2_fh_exit(&fh->fh);
1580         file->private_data = NULL;
1581         mutex_unlock(&layer->opslock);
1582 
1583         /* Free memory allocated to file handle object */
1584         kfree(fh);
1585 
1586         disp_dev->cbcr_ofst = 0;
1587 
1588         return 0;
1589 }
1590 
1591 /* vpbe capture ioctl operations */
1592 static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
1593         .vidioc_querycap         = vpbe_display_querycap,
1594         .vidioc_g_fmt_vid_out    = vpbe_display_g_fmt,
1595         .vidioc_enum_fmt_vid_out = vpbe_display_enum_fmt,
1596         .vidioc_s_fmt_vid_out    = vpbe_display_s_fmt,
1597         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
1598         .vidioc_reqbufs          = vpbe_display_reqbufs,
1599         .vidioc_querybuf         = vpbe_display_querybuf,
1600         .vidioc_qbuf             = vpbe_display_qbuf,
1601         .vidioc_dqbuf            = vpbe_display_dqbuf,
1602         .vidioc_streamon         = vpbe_display_streamon,
1603         .vidioc_streamoff        = vpbe_display_streamoff,
1604         .vidioc_cropcap          = vpbe_display_cropcap,
1605         .vidioc_g_crop           = vpbe_display_g_crop,
1606         .vidioc_s_crop           = vpbe_display_s_crop,
1607         .vidioc_s_std            = vpbe_display_s_std,
1608         .vidioc_g_std            = vpbe_display_g_std,
1609         .vidioc_enum_output      = vpbe_display_enum_output,
1610         .vidioc_s_output         = vpbe_display_s_output,
1611         .vidioc_g_output         = vpbe_display_g_output,
1612         .vidioc_s_dv_timings     = vpbe_display_s_dv_timings,
1613         .vidioc_g_dv_timings     = vpbe_display_g_dv_timings,
1614         .vidioc_enum_dv_timings  = vpbe_display_enum_dv_timings,
1615 };
1616 
1617 static struct v4l2_file_operations vpbe_fops = {
1618         .owner = THIS_MODULE,
1619         .open = vpbe_display_open,
1620         .release = vpbe_display_release,
1621         .unlocked_ioctl = video_ioctl2,
1622         .mmap = vpbe_display_mmap,
1623         .poll = vpbe_display_poll
1624 };
1625 
1626 static int vpbe_device_get(struct device *dev, void *data)
1627 {
1628         struct platform_device *pdev = to_platform_device(dev);
1629         struct vpbe_display *vpbe_disp  = data;
1630 
1631         if (strcmp("vpbe_controller", pdev->name) == 0)
1632                 vpbe_disp->vpbe_dev = platform_get_drvdata(pdev);
1633 
1634         if (strstr(pdev->name, "vpbe-osd") != NULL)
1635                 vpbe_disp->osd_device = platform_get_drvdata(pdev);
1636 
1637         return 0;
1638 }
1639 
1640 static int init_vpbe_layer(int i, struct vpbe_display *disp_dev,
1641                            struct platform_device *pdev)
1642 {
1643         struct vpbe_layer *vpbe_display_layer = NULL;
1644         struct video_device *vbd = NULL;
1645 
1646         /* Allocate memory for four plane display objects */
1647 
1648         disp_dev->dev[i] =
1649                 kzalloc(sizeof(struct vpbe_layer), GFP_KERNEL);
1650 
1651         /* If memory allocation fails, return error */
1652         if (!disp_dev->dev[i]) {
1653                 printk(KERN_ERR "ran out of memory\n");
1654                 return  -ENOMEM;
1655         }
1656         spin_lock_init(&disp_dev->dev[i]->irqlock);
1657         mutex_init(&disp_dev->dev[i]->opslock);
1658 
1659         /* Get the pointer to the layer object */
1660         vpbe_display_layer = disp_dev->dev[i];
1661         vbd = &vpbe_display_layer->video_dev;
1662         /* Initialize field of video device */
1663         vbd->release    = video_device_release_empty;
1664         vbd->fops       = &vpbe_fops;
1665         vbd->ioctl_ops  = &vpbe_ioctl_ops;
1666         vbd->minor      = -1;
1667         vbd->v4l2_dev   = &disp_dev->vpbe_dev->v4l2_dev;
1668         vbd->lock       = &vpbe_display_layer->opslock;
1669         vbd->vfl_dir    = VFL_DIR_TX;
1670 
1671         if (disp_dev->vpbe_dev->current_timings.timings_type &
1672                         VPBE_ENC_STD)
1673                 vbd->tvnorms = (V4L2_STD_525_60 | V4L2_STD_625_50);
1674 
1675         snprintf(vbd->name, sizeof(vbd->name),
1676                         "DaVinci_VPBE Display_DRIVER_V%d.%d.%d",
1677                         (VPBE_DISPLAY_VERSION_CODE >> 16) & 0xff,
1678                         (VPBE_DISPLAY_VERSION_CODE >> 8) & 0xff,
1679                         (VPBE_DISPLAY_VERSION_CODE) & 0xff);
1680 
1681         vpbe_display_layer->device_id = i;
1682 
1683         vpbe_display_layer->layer_info.id =
1684                 ((i == VPBE_DISPLAY_DEVICE_0) ? WIN_VID0 : WIN_VID1);
1685 
1686 
1687         return 0;
1688 }
1689 
1690 static int register_device(struct vpbe_layer *vpbe_display_layer,
1691                            struct vpbe_display *disp_dev,
1692                            struct platform_device *pdev)
1693 {
1694         int err;
1695 
1696         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1697                   "Trying to register VPBE display device.\n");
1698         v4l2_info(&disp_dev->vpbe_dev->v4l2_dev,
1699                   "layer=%x,layer->video_dev=%x\n",
1700                   (int)vpbe_display_layer,
1701                   (int)&vpbe_display_layer->video_dev);
1702 
1703         err = video_register_device(&vpbe_display_layer->video_dev,
1704                                     VFL_TYPE_GRABBER,
1705                                     -1);
1706         if (err)
1707                 return -ENODEV;
1708 
1709         vpbe_display_layer->disp_dev = disp_dev;
1710         /* set the driver data in platform device */
1711         platform_set_drvdata(pdev, disp_dev);
1712         set_bit(V4L2_FL_USE_FH_PRIO, &vpbe_display_layer->video_dev.flags);
1713         video_set_drvdata(&vpbe_display_layer->video_dev,
1714                           vpbe_display_layer);
1715 
1716         return 0;
1717 }
1718 
1719 
1720 
1721 /*
1722  * vpbe_display_probe()
1723  * This function creates device entries by register itself to the V4L2 driver
1724  * and initializes fields of each layer objects
1725  */
1726 static int vpbe_display_probe(struct platform_device *pdev)
1727 {
1728         struct vpbe_layer *vpbe_display_layer;
1729         struct vpbe_display *disp_dev;
1730         struct resource *res = NULL;
1731         int k;
1732         int i;
1733         int err;
1734         int irq;
1735 
1736         printk(KERN_DEBUG "vpbe_display_probe\n");
1737         /* Allocate memory for vpbe_display */
1738         disp_dev = devm_kzalloc(&pdev->dev, sizeof(struct vpbe_display),
1739                                 GFP_KERNEL);
1740         if (!disp_dev)
1741                 return -ENOMEM;
1742 
1743         spin_lock_init(&disp_dev->dma_queue_lock);
1744         /*
1745          * Scan all the platform devices to find the vpbe
1746          * controller device and get the vpbe_dev object
1747          */
1748         err = bus_for_each_dev(&platform_bus_type, NULL, disp_dev,
1749                         vpbe_device_get);
1750         if (err < 0)
1751                 return err;
1752         /* Initialize the vpbe display controller */
1753         if (NULL != disp_dev->vpbe_dev->ops.initialize) {
1754                 err = disp_dev->vpbe_dev->ops.initialize(&pdev->dev,
1755                                                          disp_dev->vpbe_dev);
1756                 if (err) {
1757                         v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1758                                         "Error initing vpbe\n");
1759                         err = -ENOMEM;
1760                         goto probe_out;
1761                 }
1762         }
1763 
1764         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1765                 if (init_vpbe_layer(i, disp_dev, pdev)) {
1766                         err = -ENODEV;
1767                         goto probe_out;
1768                 }
1769         }
1770 
1771         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1772         if (!res) {
1773                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1774                          "Unable to get VENC interrupt resource\n");
1775                 err = -ENODEV;
1776                 goto probe_out;
1777         }
1778 
1779         irq = res->start;
1780         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
1781                                VPBE_DISPLAY_DRIVER, disp_dev);
1782         if (err) {
1783                 v4l2_err(&disp_dev->vpbe_dev->v4l2_dev,
1784                                 "Unable to request interrupt\n");
1785                 goto probe_out;
1786         }
1787 
1788         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1789                 if (register_device(disp_dev->dev[i], disp_dev, pdev)) {
1790                         err = -ENODEV;
1791                         goto probe_out;
1792                 }
1793         }
1794 
1795         printk(KERN_DEBUG "Successfully completed the probing of vpbe v4l2 device\n");
1796         return 0;
1797 
1798 probe_out:
1799         for (k = 0; k < VPBE_DISPLAY_MAX_DEVICES; k++) {
1800                 /* Get the pointer to the layer object */
1801                 vpbe_display_layer = disp_dev->dev[k];
1802                 /* Unregister video device */
1803                 if (vpbe_display_layer) {
1804                         video_unregister_device(
1805                                 &vpbe_display_layer->video_dev);
1806                                 kfree(disp_dev->dev[k]);
1807                 }
1808         }
1809         return err;
1810 }
1811 
1812 /*
1813  * vpbe_display_remove()
1814  * It un-register hardware layer from V4L2 driver
1815  */
1816 static int vpbe_display_remove(struct platform_device *pdev)
1817 {
1818         struct vpbe_layer *vpbe_display_layer;
1819         struct vpbe_display *disp_dev = platform_get_drvdata(pdev);
1820         struct vpbe_device *vpbe_dev = disp_dev->vpbe_dev;
1821         int i;
1822 
1823         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_display_remove\n");
1824 
1825         /* deinitialize the vpbe display controller */
1826         if (NULL != vpbe_dev->ops.deinitialize)
1827                 vpbe_dev->ops.deinitialize(&pdev->dev, vpbe_dev);
1828         /* un-register device */
1829         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1830                 /* Get the pointer to the layer object */
1831                 vpbe_display_layer = disp_dev->dev[i];
1832                 /* Unregister video device */
1833                 video_unregister_device(&vpbe_display_layer->video_dev);
1834 
1835         }
1836         for (i = 0; i < VPBE_DISPLAY_MAX_DEVICES; i++) {
1837                 kfree(disp_dev->dev[i]);
1838                 disp_dev->dev[i] = NULL;
1839         }
1840 
1841         return 0;
1842 }
1843 
1844 static struct platform_driver vpbe_display_driver = {
1845         .driver = {
1846                 .name = VPBE_DISPLAY_DRIVER,
1847                 .owner = THIS_MODULE,
1848                 .bus = &platform_bus_type,
1849         },
1850         .probe = vpbe_display_probe,
1851         .remove = vpbe_display_remove,
1852 };
1853 
1854 module_platform_driver(vpbe_display_driver);
1855 
1856 MODULE_DESCRIPTION("TI DM644x/DM355/DM365 VPBE Display controller");
1857 MODULE_LICENSE("GPL");
1858 MODULE_AUTHOR("Texas Instruments");
1859 

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