Version:  2.0.40 2.2.26 2.4.37 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 3.17

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

  1 /*
  2  * vpif-display - VPIF display driver
  3  * Display driver for TI DaVinci VPIF
  4  *
  5  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
  6  * Copyright (C) 2014 Lad, Prabhakar <prabhakar.csengg@gmail.com>
  7  *
  8  * This program is free software; you can redistribute it and/or
  9  * modify it under the terms of the GNU General Public License as
 10  * published by the Free Software Foundation version 2.
 11  *
 12  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
 13  * kind, whether express or implied; without even the implied warranty
 14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  */
 17 
 18 #include <linux/interrupt.h>
 19 #include <linux/module.h>
 20 #include <linux/platform_device.h>
 21 #include <linux/slab.h>
 22 
 23 #include <media/v4l2-ioctl.h>
 24 
 25 #include "vpif.h"
 26 #include "vpif_display.h"
 27 
 28 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
 29 MODULE_LICENSE("GPL");
 30 MODULE_VERSION(VPIF_DISPLAY_VERSION);
 31 
 32 #define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
 33 
 34 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
 35 #define vpif_dbg(level, debug, fmt, arg...)     \
 36                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
 37 
 38 static int debug = 1;
 39 
 40 module_param(debug, int, 0644);
 41 
 42 MODULE_PARM_DESC(debug, "Debug level 0-1");
 43 
 44 #define VPIF_DRIVER_NAME        "vpif_display"
 45 
 46 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
 47 static int ycmux_mode;
 48 
 49 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 50 
 51 static struct vpif_device vpif_obj = { {NULL} };
 52 static struct device *vpif_dev;
 53 static void vpif_calculate_offsets(struct channel_obj *ch);
 54 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
 55 
 56 static inline struct vpif_disp_buffer *to_vpif_buffer(struct vb2_buffer *vb)
 57 {
 58         return container_of(vb, struct vpif_disp_buffer, vb);
 59 }
 60 
 61 /**
 62  * vpif_buffer_prepare :  callback function for buffer prepare
 63  * @vb: ptr to vb2_buffer
 64  *
 65  * This is the callback function for buffer prepare when vb2_qbuf()
 66  * function is called. The buffer is prepared and user space virtual address
 67  * or user address is converted into  physical address
 68  */
 69 static int vpif_buffer_prepare(struct vb2_buffer *vb)
 70 {
 71         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 72         struct common_obj *common;
 73 
 74         common = &ch->common[VPIF_VIDEO_INDEX];
 75 
 76         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 77         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 78                 return -EINVAL;
 79 
 80         vb->v4l2_buf.field = common->fmt.fmt.pix.field;
 81 
 82         if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
 83                 unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 84 
 85                 if (!ISALIGNED(addr + common->ytop_off) ||
 86                         !ISALIGNED(addr + common->ybtm_off) ||
 87                         !ISALIGNED(addr + common->ctop_off) ||
 88                         !ISALIGNED(addr + common->cbtm_off)) {
 89                         vpif_err("buffer offset not aligned to 8 bytes\n");
 90                         return -EINVAL;
 91                 }
 92         }
 93 
 94         return 0;
 95 }
 96 
 97 /**
 98  * vpif_buffer_queue_setup : Callback function for buffer setup.
 99  * @vq: vb2_queue ptr
100  * @fmt: v4l2 format
101  * @nbuffers: ptr to number of buffers requested by application
102  * @nplanes:: contains number of distinct video planes needed to hold a frame
103  * @sizes[]: contains the size (in bytes) of each plane.
104  * @alloc_ctxs: ptr to allocation context
105  *
106  * This callback function is called when reqbuf() is called to adjust
107  * the buffer count and buffer size
108  */
109 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
110                                 const struct v4l2_format *fmt,
111                                 unsigned int *nbuffers, unsigned int *nplanes,
112                                 unsigned int sizes[], void *alloc_ctxs[])
113 {
114         struct channel_obj *ch = vb2_get_drv_priv(vq);
115         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
116 
117         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
118                 return -EINVAL;
119 
120         if (vq->num_buffers + *nbuffers < 3)
121                 *nbuffers = 3 - vq->num_buffers;
122 
123         *nplanes = 1;
124         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
125         alloc_ctxs[0] = common->alloc_ctx;
126 
127         /* Calculate the offset for Y and C data  in the buffer */
128         vpif_calculate_offsets(ch);
129 
130         return 0;
131 }
132 
133 /**
134  * vpif_buffer_queue : Callback function to add buffer to DMA queue
135  * @vb: ptr to vb2_buffer
136  *
137  * This callback fucntion queues the buffer to DMA engine
138  */
139 static void vpif_buffer_queue(struct vb2_buffer *vb)
140 {
141         struct vpif_disp_buffer *buf = to_vpif_buffer(vb);
142         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
143         struct common_obj *common;
144         unsigned long flags;
145 
146         common = &ch->common[VPIF_VIDEO_INDEX];
147 
148         /* add the buffer to the DMA queue */
149         spin_lock_irqsave(&common->irqlock, flags);
150         list_add_tail(&buf->list, &common->dma_queue);
151         spin_unlock_irqrestore(&common->irqlock, flags);
152 }
153 
154 /**
155  * vpif_start_streaming : Starts the DMA engine for streaming
156  * @vb: ptr to vb2_buffer
157  * @count: number of buffers
158  */
159 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
160 {
161         struct vpif_display_config *vpif_config_data =
162                                         vpif_dev->platform_data;
163         struct channel_obj *ch = vb2_get_drv_priv(vq);
164         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
165         struct vpif_params *vpif = &ch->vpifparams;
166         struct vpif_disp_buffer *buf, *tmp;
167         unsigned long addr, flags;
168         int ret;
169 
170         spin_lock_irqsave(&common->irqlock, flags);
171 
172         /* Initialize field_id */
173         ch->field_id = 0;
174 
175         /* clock settings */
176         if (vpif_config_data->set_clock) {
177                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
178                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
179                 if (ret < 0) {
180                         vpif_err("can't set clock\n");
181                         goto err;
182                 }
183         }
184 
185         /* set the parameters and addresses */
186         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
187         if (ret < 0)
188                 goto err;
189 
190         ycmux_mode = ret;
191         vpif_config_addr(ch, ret);
192         /* Get the next frame from the buffer queue */
193         common->next_frm = common->cur_frm =
194                             list_entry(common->dma_queue.next,
195                                        struct vpif_disp_buffer, list);
196 
197         list_del(&common->cur_frm->list);
198         spin_unlock_irqrestore(&common->irqlock, flags);
199         /* Mark state of the current frame to active */
200         common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
201 
202         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
203         common->set_addr((addr + common->ytop_off),
204                             (addr + common->ybtm_off),
205                             (addr + common->ctop_off),
206                             (addr + common->cbtm_off));
207 
208         /*
209          * Set interrupt for both the fields in VPIF
210          * Register enable channel in VPIF register
211          */
212         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
213         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
214                 channel2_intr_assert();
215                 channel2_intr_enable(1);
216                 enable_channel2(1);
217                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
218                         channel2_clipping_enable(1);
219         }
220 
221         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
222                 channel3_intr_assert();
223                 channel3_intr_enable(1);
224                 enable_channel3(1);
225                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
226                         channel3_clipping_enable(1);
227         }
228 
229         return 0;
230 
231 err:
232         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
233                 list_del(&buf->list);
234                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
235         }
236         spin_unlock_irqrestore(&common->irqlock, flags);
237 
238         return ret;
239 }
240 
241 /**
242  * vpif_stop_streaming : Stop the DMA engine
243  * @vq: ptr to vb2_queue
244  *
245  * This callback stops the DMA engine and any remaining buffers
246  * in the DMA queue are released.
247  */
248 static void vpif_stop_streaming(struct vb2_queue *vq)
249 {
250         struct channel_obj *ch = vb2_get_drv_priv(vq);
251         struct common_obj *common;
252         unsigned long flags;
253 
254         common = &ch->common[VPIF_VIDEO_INDEX];
255 
256         /* Disable channel */
257         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
258                 enable_channel2(0);
259                 channel2_intr_enable(0);
260         }
261         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
262                 enable_channel3(0);
263                 channel3_intr_enable(0);
264         }
265 
266         /* release all active buffers */
267         spin_lock_irqsave(&common->irqlock, flags);
268         if (common->cur_frm == common->next_frm) {
269                 vb2_buffer_done(&common->cur_frm->vb, VB2_BUF_STATE_ERROR);
270         } else {
271                 if (common->cur_frm != NULL)
272                         vb2_buffer_done(&common->cur_frm->vb,
273                                         VB2_BUF_STATE_ERROR);
274                 if (common->next_frm != NULL)
275                         vb2_buffer_done(&common->next_frm->vb,
276                                         VB2_BUF_STATE_ERROR);
277         }
278 
279         while (!list_empty(&common->dma_queue)) {
280                 common->next_frm = list_entry(common->dma_queue.next,
281                                                 struct vpif_disp_buffer, list);
282                 list_del(&common->next_frm->list);
283                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
284         }
285         spin_unlock_irqrestore(&common->irqlock, flags);
286 }
287 
288 static struct vb2_ops video_qops = {
289         .queue_setup            = vpif_buffer_queue_setup,
290         .wait_prepare           = vb2_ops_wait_prepare,
291         .wait_finish            = vb2_ops_wait_finish,
292         .buf_prepare            = vpif_buffer_prepare,
293         .start_streaming        = vpif_start_streaming,
294         .stop_streaming         = vpif_stop_streaming,
295         .buf_queue              = vpif_buffer_queue,
296 };
297 
298 static void process_progressive_mode(struct common_obj *common)
299 {
300         unsigned long addr = 0;
301 
302         spin_lock(&common->irqlock);
303         /* Get the next buffer from buffer queue */
304         common->next_frm = list_entry(common->dma_queue.next,
305                                 struct vpif_disp_buffer, list);
306         /* Remove that buffer from the buffer queue */
307         list_del(&common->next_frm->list);
308         spin_unlock(&common->irqlock);
309         /* Mark status of the buffer as active */
310         common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
311 
312         /* Set top and bottom field addrs in VPIF registers */
313         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
314         common->set_addr(addr + common->ytop_off,
315                                  addr + common->ybtm_off,
316                                  addr + common->ctop_off,
317                                  addr + common->cbtm_off);
318 }
319 
320 static void process_interlaced_mode(int fid, struct common_obj *common)
321 {
322         /* device field id and local field id are in sync */
323         /* If this is even field */
324         if (0 == fid) {
325                 if (common->cur_frm == common->next_frm)
326                         return;
327 
328                 /* one frame is displayed If next frame is
329                  *  available, release cur_frm and move on */
330                 /* Copy frame display time */
331                 v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
332                 /* Change status of the cur_frm */
333                 vb2_buffer_done(&common->cur_frm->vb,
334                                             VB2_BUF_STATE_DONE);
335                 /* Make cur_frm pointing to next_frm */
336                 common->cur_frm = common->next_frm;
337 
338         } else if (1 == fid) {  /* odd field */
339                 spin_lock(&common->irqlock);
340                 if (list_empty(&common->dma_queue)
341                     || (common->cur_frm != common->next_frm)) {
342                         spin_unlock(&common->irqlock);
343                         return;
344                 }
345                 spin_unlock(&common->irqlock);
346                 /* one field is displayed configure the next
347                  * frame if it is available else hold on current
348                  * frame */
349                 /* Get next from the buffer queue */
350                 process_progressive_mode(common);
351         }
352 }
353 
354 /*
355  * vpif_channel_isr: It changes status of the displayed buffer, takes next
356  * buffer from the queue and sets its address in VPIF registers
357  */
358 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
359 {
360         struct vpif_device *dev = &vpif_obj;
361         struct channel_obj *ch;
362         struct common_obj *common;
363         enum v4l2_field field;
364         int fid = -1, i;
365         int channel_id = 0;
366 
367         channel_id = *(int *)(dev_id);
368         if (!vpif_intr_status(channel_id + 2))
369                 return IRQ_NONE;
370 
371         ch = dev->dev[channel_id];
372         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
373         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
374                 common = &ch->common[i];
375                 /* If streaming is started in this channel */
376 
377                 if (1 == ch->vpifparams.std_info.frm_fmt) {
378                         spin_lock(&common->irqlock);
379                         if (list_empty(&common->dma_queue)) {
380                                 spin_unlock(&common->irqlock);
381                                 continue;
382                         }
383                         spin_unlock(&common->irqlock);
384 
385                         /* Progressive mode */
386                         if (!channel_first_int[i][channel_id]) {
387                                 /* Mark status of the cur_frm to
388                                  * done and unlock semaphore on it */
389                                 v4l2_get_timestamp(&common->cur_frm->vb.
390                                                    v4l2_buf.timestamp);
391                                 vb2_buffer_done(&common->cur_frm->vb,
392                                             VB2_BUF_STATE_DONE);
393                                 /* Make cur_frm pointing to next_frm */
394                                 common->cur_frm = common->next_frm;
395                         }
396 
397                         channel_first_int[i][channel_id] = 0;
398                         process_progressive_mode(common);
399                 } else {
400                         /* Interlaced mode */
401                         /* If it is first interrupt, ignore it */
402 
403                         if (channel_first_int[i][channel_id]) {
404                                 channel_first_int[i][channel_id] = 0;
405                                 continue;
406                         }
407 
408                         if (0 == i) {
409                                 ch->field_id ^= 1;
410                                 /* Get field id from VPIF registers */
411                                 fid = vpif_channel_getfid(ch->channel_id + 2);
412                                 /* If fid does not match with stored field id */
413                                 if (fid != ch->field_id) {
414                                         /* Make them in sync */
415                                         if (0 == fid)
416                                                 ch->field_id = fid;
417 
418                                         return IRQ_HANDLED;
419                                 }
420                         }
421                         process_interlaced_mode(fid, common);
422                 }
423         }
424 
425         return IRQ_HANDLED;
426 }
427 
428 static int vpif_update_std_info(struct channel_obj *ch)
429 {
430         struct video_obj *vid_ch = &ch->video;
431         struct vpif_params *vpifparams = &ch->vpifparams;
432         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
433         const struct vpif_channel_config_params *config;
434 
435         int i;
436 
437         for (i = 0; i < vpif_ch_params_count; i++) {
438                 config = &vpif_ch_params[i];
439                 if (config->hd_sd == 0) {
440                         vpif_dbg(2, debug, "SD format\n");
441                         if (config->stdid & vid_ch->stdid) {
442                                 memcpy(std_info, config, sizeof(*config));
443                                 break;
444                         }
445                 }
446         }
447 
448         if (i == vpif_ch_params_count) {
449                 vpif_dbg(1, debug, "Format not found\n");
450                 return -EINVAL;
451         }
452 
453         return 0;
454 }
455 
456 static int vpif_update_resolution(struct channel_obj *ch)
457 {
458         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
459         struct video_obj *vid_ch = &ch->video;
460         struct vpif_params *vpifparams = &ch->vpifparams;
461         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
462 
463         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
464                 return -EINVAL;
465 
466         if (vid_ch->stdid) {
467                 if (vpif_update_std_info(ch))
468                         return -EINVAL;
469         }
470 
471         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
472         common->fmt.fmt.pix.width = std_info->width;
473         common->fmt.fmt.pix.height = std_info->height;
474         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
475                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
476 
477         /* Set height and width paramateres */
478         common->height = std_info->height;
479         common->width = std_info->width;
480         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
481 
482         if (vid_ch->stdid)
483                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
484         else
485                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
486 
487         if (ch->vpifparams.std_info.frm_fmt)
488                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
489         else
490                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
491 
492         return 0;
493 }
494 
495 /*
496  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
497  * in the top and bottom field
498  */
499 static void vpif_calculate_offsets(struct channel_obj *ch)
500 {
501         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
502         struct vpif_params *vpifparams = &ch->vpifparams;
503         enum v4l2_field field = common->fmt.fmt.pix.field;
504         struct video_obj *vid_ch = &ch->video;
505         unsigned int hpitch, vpitch, sizeimage;
506 
507         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
508                 if (ch->vpifparams.std_info.frm_fmt)
509                         vid_ch->buf_field = V4L2_FIELD_NONE;
510                 else
511                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
512         } else {
513                 vid_ch->buf_field = common->fmt.fmt.pix.field;
514         }
515 
516         sizeimage = common->fmt.fmt.pix.sizeimage;
517 
518         hpitch = common->fmt.fmt.pix.bytesperline;
519         vpitch = sizeimage / (hpitch * 2);
520         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
521             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
522                 common->ytop_off = 0;
523                 common->ybtm_off = hpitch;
524                 common->ctop_off = sizeimage / 2;
525                 common->cbtm_off = sizeimage / 2 + hpitch;
526         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
527                 common->ytop_off = 0;
528                 common->ybtm_off = sizeimage / 4;
529                 common->ctop_off = sizeimage / 2;
530                 common->cbtm_off = common->ctop_off + sizeimage / 4;
531         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
532                 common->ybtm_off = 0;
533                 common->ytop_off = sizeimage / 4;
534                 common->cbtm_off = sizeimage / 2;
535                 common->ctop_off = common->cbtm_off + sizeimage / 4;
536         }
537 
538         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
539             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
540                 vpifparams->video_params.storage_mode = 1;
541         } else {
542                 vpifparams->video_params.storage_mode = 0;
543         }
544 
545         if (ch->vpifparams.std_info.frm_fmt == 1) {
546                 vpifparams->video_params.hpitch =
547                     common->fmt.fmt.pix.bytesperline;
548         } else {
549                 if ((field == V4L2_FIELD_ANY) ||
550                         (field == V4L2_FIELD_INTERLACED))
551                         vpifparams->video_params.hpitch =
552                             common->fmt.fmt.pix.bytesperline * 2;
553                 else
554                         vpifparams->video_params.hpitch =
555                             common->fmt.fmt.pix.bytesperline;
556         }
557 
558         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
559 }
560 
561 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
562 {
563         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
564 
565         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
566                 common->set_addr = ch3_set_videobuf_addr;
567         } else {
568                 if (2 == muxmode)
569                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
570                 else
571                         common->set_addr = ch2_set_videobuf_addr;
572         }
573 }
574 
575 /* functions implementing ioctls */
576 /**
577  * vpif_querycap() - QUERYCAP handler
578  * @file: file ptr
579  * @priv: file handle
580  * @cap: ptr to v4l2_capability structure
581  */
582 static int vpif_querycap(struct file *file, void  *priv,
583                                 struct v4l2_capability *cap)
584 {
585         struct vpif_display_config *config = vpif_dev->platform_data;
586 
587         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
588         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
589         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
590         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
591                  dev_name(vpif_dev));
592         strlcpy(cap->card, config->card_name, sizeof(cap->card));
593 
594         return 0;
595 }
596 
597 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
598                                         struct v4l2_fmtdesc *fmt)
599 {
600         if (fmt->index != 0)
601                 return -EINVAL;
602 
603         /* Fill in the information about format */
604         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
605         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
606         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
607         fmt->flags = 0;
608         return 0;
609 }
610 
611 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
612                                 struct v4l2_format *fmt)
613 {
614         struct video_device *vdev = video_devdata(file);
615         struct channel_obj *ch = video_get_drvdata(vdev);
616         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
617 
618         /* Check the validity of the buffer type */
619         if (common->fmt.type != fmt->type)
620                 return -EINVAL;
621 
622         if (vpif_update_resolution(ch))
623                 return -EINVAL;
624         *fmt = common->fmt;
625         return 0;
626 }
627 
628 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
629                                 struct v4l2_format *fmt)
630 {
631         struct video_device *vdev = video_devdata(file);
632         struct channel_obj *ch = video_get_drvdata(vdev);
633         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
634         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
635 
636         /*
637          * to supress v4l-compliance warnings silently correct
638          * the pixelformat
639          */
640         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
641                 pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
642 
643         if (vpif_update_resolution(ch))
644                 return -EINVAL;
645 
646         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
647         pixfmt->field = common->fmt.fmt.pix.field;
648         pixfmt->bytesperline = common->fmt.fmt.pix.width;
649         pixfmt->width = common->fmt.fmt.pix.width;
650         pixfmt->height = common->fmt.fmt.pix.height;
651         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
652 
653         return 0;
654 }
655 
656 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
657                                 struct v4l2_format *fmt)
658 {
659         struct video_device *vdev = video_devdata(file);
660         struct channel_obj *ch = video_get_drvdata(vdev);
661         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
662         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
663         int ret;
664 
665         if (vb2_is_busy(&common->buffer_queue))
666                 return -EBUSY;
667 
668         ret = vpif_try_fmt_vid_out(file, priv, fmt);
669         if (ret)
670                 return ret;
671 
672         /* store the pix format in the channel object */
673         common->fmt.fmt.pix = *pixfmt;
674 
675         /* store the format in the channel object */
676         common->fmt = *fmt;
677         return 0;
678 }
679 
680 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
681 {
682         struct vpif_display_config *config = vpif_dev->platform_data;
683         struct video_device *vdev = video_devdata(file);
684         struct channel_obj *ch = video_get_drvdata(vdev);
685         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
686         struct vpif_display_chan_config *chan_cfg;
687         struct v4l2_output output;
688         int ret;
689 
690         if (config->chan_config[ch->channel_id].outputs == NULL)
691                 return -ENODATA;
692 
693         chan_cfg = &config->chan_config[ch->channel_id];
694         output = chan_cfg->outputs[ch->output_idx].output;
695         if (output.capabilities != V4L2_OUT_CAP_STD)
696                 return -ENODATA;
697 
698         if (vb2_is_busy(&common->buffer_queue))
699                 return -EBUSY;
700 
701 
702         if (!(std_id & VPIF_V4L2_STD))
703                 return -EINVAL;
704 
705         /* Call encoder subdevice function to set the standard */
706         ch->video.stdid = std_id;
707         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
708         /* Get the information about the standard */
709         if (vpif_update_resolution(ch))
710                 return -EINVAL;
711 
712         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
713 
714         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
715                                                 s_std_output, std_id);
716         if (ret < 0) {
717                 vpif_err("Failed to set output standard\n");
718                 return ret;
719         }
720 
721         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
722                                                         s_std, std_id);
723         if (ret < 0)
724                 vpif_err("Failed to set standard for sub devices\n");
725         return ret;
726 }
727 
728 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
729 {
730         struct vpif_display_config *config = vpif_dev->platform_data;
731         struct video_device *vdev = video_devdata(file);
732         struct channel_obj *ch = video_get_drvdata(vdev);
733         struct vpif_display_chan_config *chan_cfg;
734         struct v4l2_output output;
735 
736         if (config->chan_config[ch->channel_id].outputs == NULL)
737                 return -ENODATA;
738 
739         chan_cfg = &config->chan_config[ch->channel_id];
740         output = chan_cfg->outputs[ch->output_idx].output;
741         if (output.capabilities != V4L2_OUT_CAP_STD)
742                 return -ENODATA;
743 
744         *std = ch->video.stdid;
745         return 0;
746 }
747 
748 static int vpif_enum_output(struct file *file, void *fh,
749                                 struct v4l2_output *output)
750 {
751 
752         struct vpif_display_config *config = vpif_dev->platform_data;
753         struct video_device *vdev = video_devdata(file);
754         struct channel_obj *ch = video_get_drvdata(vdev);
755         struct vpif_display_chan_config *chan_cfg;
756 
757         chan_cfg = &config->chan_config[ch->channel_id];
758         if (output->index >= chan_cfg->output_count) {
759                 vpif_dbg(1, debug, "Invalid output index\n");
760                 return -EINVAL;
761         }
762 
763         *output = chan_cfg->outputs[output->index].output;
764         return 0;
765 }
766 
767 /**
768  * vpif_output_to_subdev() - Maps output to sub device
769  * @vpif_cfg - global config ptr
770  * @chan_cfg - channel config ptr
771  * @index - Given output index from application
772  *
773  * lookup the sub device information for a given output index.
774  * we report all the output to application. output table also
775  * has sub device name for the each output
776  */
777 static int
778 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
779                       struct vpif_display_chan_config *chan_cfg, int index)
780 {
781         struct vpif_subdev_info *subdev_info;
782         const char *subdev_name;
783         int i;
784 
785         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
786 
787         if (chan_cfg->outputs == NULL)
788                 return -1;
789 
790         subdev_name = chan_cfg->outputs[index].subdev_name;
791         if (subdev_name == NULL)
792                 return -1;
793 
794         /* loop through the sub device list to get the sub device info */
795         for (i = 0; i < vpif_cfg->subdev_count; i++) {
796                 subdev_info = &vpif_cfg->subdevinfo[i];
797                 if (!strcmp(subdev_info->name, subdev_name))
798                         return i;
799         }
800         return -1;
801 }
802 
803 /**
804  * vpif_set_output() - Select an output
805  * @vpif_cfg - global config ptr
806  * @ch - channel
807  * @index - Given output index from application
808  *
809  * Select the given output.
810  */
811 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
812                       struct channel_obj *ch, int index)
813 {
814         struct vpif_display_chan_config *chan_cfg =
815                 &vpif_cfg->chan_config[ch->channel_id];
816         struct vpif_subdev_info *subdev_info = NULL;
817         struct v4l2_subdev *sd = NULL;
818         u32 input = 0, output = 0;
819         int sd_index;
820         int ret;
821 
822         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
823         if (sd_index >= 0) {
824                 sd = vpif_obj.sd[sd_index];
825                 subdev_info = &vpif_cfg->subdevinfo[sd_index];
826         }
827 
828         if (sd) {
829                 input = chan_cfg->outputs[index].input_route;
830                 output = chan_cfg->outputs[index].output_route;
831                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
832                 if (ret < 0 && ret != -ENOIOCTLCMD) {
833                         vpif_err("Failed to set output\n");
834                         return ret;
835                 }
836 
837         }
838         ch->output_idx = index;
839         ch->sd = sd;
840         if (chan_cfg->outputs != NULL)
841                 /* update tvnorms from the sub device output info */
842                 ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
843         return 0;
844 }
845 
846 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
847 {
848         struct vpif_display_config *config = vpif_dev->platform_data;
849         struct video_device *vdev = video_devdata(file);
850         struct channel_obj *ch = video_get_drvdata(vdev);
851         struct vpif_display_chan_config *chan_cfg;
852         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
853 
854         if (vb2_is_busy(&common->buffer_queue))
855                 return -EBUSY;
856 
857         chan_cfg = &config->chan_config[ch->channel_id];
858 
859         if (i >= chan_cfg->output_count)
860                 return -EINVAL;
861 
862         return vpif_set_output(config, ch, i);
863 }
864 
865 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
866 {
867         struct video_device *vdev = video_devdata(file);
868         struct channel_obj *ch = video_get_drvdata(vdev);
869 
870         *i = ch->output_idx;
871 
872         return 0;
873 }
874 
875 /**
876  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
877  * @file: file ptr
878  * @priv: file handle
879  * @timings: input timings
880  */
881 static int
882 vpif_enum_dv_timings(struct file *file, void *priv,
883                      struct v4l2_enum_dv_timings *timings)
884 {
885         struct vpif_display_config *config = vpif_dev->platform_data;
886         struct video_device *vdev = video_devdata(file);
887         struct channel_obj *ch = video_get_drvdata(vdev);
888         struct vpif_display_chan_config *chan_cfg;
889         struct v4l2_output output;
890         int ret;
891 
892         if (config->chan_config[ch->channel_id].outputs == NULL)
893                 return -ENODATA;
894 
895         chan_cfg = &config->chan_config[ch->channel_id];
896         output = chan_cfg->outputs[ch->output_idx].output;
897         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
898                 return -ENODATA;
899 
900         timings->pad = 0;
901 
902         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
903         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
904                 return -EINVAL;
905         return ret;
906 }
907 
908 /**
909  * vpif_s_dv_timings() - S_DV_TIMINGS handler
910  * @file: file ptr
911  * @priv: file handle
912  * @timings: digital video timings
913  */
914 static int vpif_s_dv_timings(struct file *file, void *priv,
915                 struct v4l2_dv_timings *timings)
916 {
917         struct vpif_display_config *config = vpif_dev->platform_data;
918         struct video_device *vdev = video_devdata(file);
919         struct channel_obj *ch = video_get_drvdata(vdev);
920         struct vpif_params *vpifparams = &ch->vpifparams;
921         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
922         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
923         struct video_obj *vid_ch = &ch->video;
924         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
925         struct vpif_display_chan_config *chan_cfg;
926         struct v4l2_output output;
927         int ret;
928 
929         if (config->chan_config[ch->channel_id].outputs == NULL)
930                 return -ENODATA;
931 
932         chan_cfg = &config->chan_config[ch->channel_id];
933         output = chan_cfg->outputs[ch->output_idx].output;
934         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
935                 return -ENODATA;
936 
937         if (vb2_is_busy(&common->buffer_queue))
938                 return -EBUSY;
939 
940         if (timings->type != V4L2_DV_BT_656_1120) {
941                 vpif_dbg(2, debug, "Timing type not defined\n");
942                 return -EINVAL;
943         }
944 
945         /* Configure subdevice timings, if any */
946         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
947         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
948                 ret = 0;
949         if (ret < 0) {
950                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
951                 return ret;
952         }
953 
954         if (!(timings->bt.width && timings->bt.height &&
955                                 (timings->bt.hbackporch ||
956                                  timings->bt.hfrontporch ||
957                                  timings->bt.hsync) &&
958                                 timings->bt.vfrontporch &&
959                                 (timings->bt.vbackporch ||
960                                  timings->bt.vsync))) {
961                 vpif_dbg(2, debug, "Timings for width, height, "
962                                 "horizontal back porch, horizontal sync, "
963                                 "horizontal front porch, vertical back porch, "
964                                 "vertical sync and vertical back porch "
965                                 "must be defined\n");
966                 return -EINVAL;
967         }
968 
969         vid_ch->dv_timings = *timings;
970 
971         /* Configure video port timings */
972 
973         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
974         std_info->sav2eav = bt->width;
975 
976         std_info->l1 = 1;
977         std_info->l3 = bt->vsync + bt->vbackporch + 1;
978 
979         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
980         if (bt->interlaced) {
981                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
982                         std_info->l5 = std_info->vsize/2 -
983                                 (bt->vfrontporch - 1);
984                         std_info->l7 = std_info->vsize/2 + 1;
985                         std_info->l9 = std_info->l7 + bt->il_vsync +
986                                 bt->il_vbackporch + 1;
987                         std_info->l11 = std_info->vsize -
988                                 (bt->il_vfrontporch - 1);
989                 } else {
990                         vpif_dbg(2, debug, "Required timing values for "
991                                         "interlaced BT format missing\n");
992                         return -EINVAL;
993                 }
994         } else {
995                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
996         }
997         strncpy(std_info->name, "Custom timings BT656/1120",
998                         VPIF_MAX_NAME);
999         std_info->width = bt->width;
1000         std_info->height = bt->height;
1001         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1002         std_info->ycmux_mode = 0;
1003         std_info->capture_format = 0;
1004         std_info->vbi_supported = 0;
1005         std_info->hd_sd = 1;
1006         std_info->stdid = 0;
1007         vid_ch->stdid = 0;
1008 
1009         return 0;
1010 }
1011 
1012 /**
1013  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1014  * @file: file ptr
1015  * @priv: file handle
1016  * @timings: digital video timings
1017  */
1018 static int vpif_g_dv_timings(struct file *file, void *priv,
1019                 struct v4l2_dv_timings *timings)
1020 {
1021         struct vpif_display_config *config = vpif_dev->platform_data;
1022         struct video_device *vdev = video_devdata(file);
1023         struct channel_obj *ch = video_get_drvdata(vdev);
1024         struct vpif_display_chan_config *chan_cfg;
1025         struct video_obj *vid_ch = &ch->video;
1026         struct v4l2_output output;
1027 
1028         if (config->chan_config[ch->channel_id].outputs == NULL)
1029                 goto error;
1030 
1031         chan_cfg = &config->chan_config[ch->channel_id];
1032         output = chan_cfg->outputs[ch->output_idx].output;
1033 
1034         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1035                 goto error;
1036 
1037         *timings = vid_ch->dv_timings;
1038 
1039         return 0;
1040 error:
1041         return -ENODATA;
1042 }
1043 
1044 /*
1045  * vpif_log_status() - Status information
1046  * @file: file ptr
1047  * @priv: file handle
1048  *
1049  * Returns zero.
1050  */
1051 static int vpif_log_status(struct file *filep, void *priv)
1052 {
1053         /* status for sub devices */
1054         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1055 
1056         return 0;
1057 }
1058 
1059 /* vpif display ioctl operations */
1060 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1061         .vidioc_querycap                = vpif_querycap,
1062         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1063         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1064         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1065         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1066 
1067         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1068         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1069         .vidioc_querybuf                = vb2_ioctl_querybuf,
1070         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1071         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1072         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1073         .vidioc_streamon                = vb2_ioctl_streamon,
1074         .vidioc_streamoff               = vb2_ioctl_streamoff,
1075 
1076         .vidioc_s_std                   = vpif_s_std,
1077         .vidioc_g_std                   = vpif_g_std,
1078 
1079         .vidioc_enum_output             = vpif_enum_output,
1080         .vidioc_s_output                = vpif_s_output,
1081         .vidioc_g_output                = vpif_g_output,
1082 
1083         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1084         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1085         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1086 
1087         .vidioc_log_status              = vpif_log_status,
1088 };
1089 
1090 static const struct v4l2_file_operations vpif_fops = {
1091         .owner          = THIS_MODULE,
1092         .open           = v4l2_fh_open,
1093         .release        = vb2_fop_release,
1094         .unlocked_ioctl = video_ioctl2,
1095         .mmap           = vb2_fop_mmap,
1096         .poll           = vb2_fop_poll
1097 };
1098 
1099 /*Configure the channels, buffer sizei, request irq */
1100 static int initialize_vpif(void)
1101 {
1102         int free_channel_objects_index;
1103         int err, i, j;
1104 
1105         /* Allocate memory for six channel objects */
1106         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1107                 vpif_obj.dev[i] =
1108                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1109                 /* If memory allocation fails, return error */
1110                 if (!vpif_obj.dev[i]) {
1111                         free_channel_objects_index = i;
1112                         err = -ENOMEM;
1113                         goto vpif_init_free_channel_objects;
1114                 }
1115         }
1116 
1117         return 0;
1118 
1119 vpif_init_free_channel_objects:
1120         for (j = 0; j < free_channel_objects_index; j++)
1121                 kfree(vpif_obj.dev[j]);
1122         return err;
1123 }
1124 
1125 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1126                             struct v4l2_subdev *subdev,
1127                             struct v4l2_async_subdev *asd)
1128 {
1129         int i;
1130 
1131         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1132                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1133                             subdev->name)) {
1134                         vpif_obj.sd[i] = subdev;
1135                         vpif_obj.sd[i]->grp_id = 1 << i;
1136                         return 0;
1137                 }
1138 
1139         return -EINVAL;
1140 }
1141 
1142 static int vpif_probe_complete(void)
1143 {
1144         struct common_obj *common;
1145         struct video_device *vdev;
1146         struct channel_obj *ch;
1147         struct vb2_queue *q;
1148         int j, err, k;
1149 
1150         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1151                 ch = vpif_obj.dev[j];
1152                 /* Initialize field of the channel objects */
1153                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1154                         common = &ch->common[k];
1155                         spin_lock_init(&common->irqlock);
1156                         mutex_init(&common->lock);
1157                         common->set_addr = NULL;
1158                         common->ytop_off = 0;
1159                         common->ybtm_off = 0;
1160                         common->ctop_off = 0;
1161                         common->cbtm_off = 0;
1162                         common->cur_frm = NULL;
1163                         common->next_frm = NULL;
1164                         memset(&common->fmt, 0, sizeof(common->fmt));
1165                 }
1166                 ch->initialized = 0;
1167                 if (vpif_obj.config->subdev_count)
1168                         ch->sd = vpif_obj.sd[0];
1169                 ch->channel_id = j;
1170 
1171                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1172 
1173                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1174                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1175 
1176                 /* select output 0 */
1177                 err = vpif_set_output(vpif_obj.config, ch, 0);
1178                 if (err)
1179                         goto probe_out;
1180 
1181                 /* set initial format */
1182                 ch->video.stdid = V4L2_STD_525_60;
1183                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1184                 vpif_update_resolution(ch);
1185 
1186                 /* Initialize vb2 queue */
1187                 q = &common->buffer_queue;
1188                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1189                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1190                 q->drv_priv = ch;
1191                 q->ops = &video_qops;
1192                 q->mem_ops = &vb2_dma_contig_memops;
1193                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1194                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1195                 q->min_buffers_needed = 1;
1196                 q->lock = &common->lock;
1197                 err = vb2_queue_init(q);
1198                 if (err) {
1199                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1200                         goto probe_out;
1201                 }
1202 
1203                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1204                 if (IS_ERR(common->alloc_ctx)) {
1205                         vpif_err("Failed to get the context\n");
1206                         err = PTR_ERR(common->alloc_ctx);
1207                         goto probe_out;
1208                 }
1209 
1210                 INIT_LIST_HEAD(&common->dma_queue);
1211 
1212                 /* register video device */
1213                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1214                          (int)ch, (int)&ch->video_dev);
1215 
1216                 /* Initialize the video_device structure */
1217                 vdev = ch->video_dev;
1218                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1219                 vdev->release = video_device_release;
1220                 vdev->fops = &vpif_fops;
1221                 vdev->ioctl_ops = &vpif_ioctl_ops;
1222                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1223                 vdev->vfl_dir = VFL_DIR_TX;
1224                 vdev->queue = q;
1225                 vdev->lock = &common->lock;
1226                 video_set_drvdata(ch->video_dev, ch);
1227                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1228                                             (j ? 3 : 2));
1229                 if (err < 0)
1230                         goto probe_out;
1231         }
1232 
1233         return 0;
1234 
1235 probe_out:
1236         for (k = 0; k < j; k++) {
1237                 ch = vpif_obj.dev[k];
1238                 common = &ch->common[k];
1239                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1240                 video_unregister_device(ch->video_dev);
1241                 video_device_release(ch->video_dev);
1242                 ch->video_dev = NULL;
1243         }
1244         return err;
1245 }
1246 
1247 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1248 {
1249         return vpif_probe_complete();
1250 }
1251 
1252 /*
1253  * vpif_probe: This function creates device entries by register itself to the
1254  * V4L2 driver and initializes fields of each channel objects
1255  */
1256 static __init int vpif_probe(struct platform_device *pdev)
1257 {
1258         struct vpif_subdev_info *subdevdata;
1259         int i, j = 0, err = 0;
1260         int res_idx = 0;
1261         struct i2c_adapter *i2c_adap;
1262         struct channel_obj *ch;
1263         struct video_device *vfd;
1264         struct resource *res;
1265         int subdev_count;
1266 
1267         vpif_dev = &pdev->dev;
1268         err = initialize_vpif();
1269 
1270         if (err) {
1271                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1272                 return err;
1273         }
1274 
1275         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1276         if (err) {
1277                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1278                 return err;
1279         }
1280 
1281         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1282                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1283                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1284                                         (void *)(&vpif_obj.dev[res_idx]->
1285                                         channel_id));
1286                 if (err) {
1287                         err = -EINVAL;
1288                         vpif_err("VPIF IRQ request failed\n");
1289                         goto vpif_unregister;
1290                 }
1291                 res_idx++;
1292         }
1293 
1294         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1295                 /* Get the pointer to the channel object */
1296                 ch = vpif_obj.dev[i];
1297 
1298                 /* Allocate memory for video device */
1299                 vfd = video_device_alloc();
1300                 if (vfd == NULL) {
1301                         for (j = 0; j < i; j++) {
1302                                 ch = vpif_obj.dev[j];
1303                                 video_device_release(ch->video_dev);
1304                         }
1305                         err = -ENOMEM;
1306                         goto vpif_unregister;
1307                 }
1308 
1309                 /* Set video_dev to the video device */
1310                 ch->video_dev = vfd;
1311         }
1312 
1313         vpif_obj.config = pdev->dev.platform_data;
1314         subdev_count = vpif_obj.config->subdev_count;
1315         subdevdata = vpif_obj.config->subdevinfo;
1316         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1317                                                                 GFP_KERNEL);
1318         if (vpif_obj.sd == NULL) {
1319                 vpif_err("unable to allocate memory for subdevice pointers\n");
1320                 err = -ENOMEM;
1321                 goto vpif_sd_error;
1322         }
1323 
1324         if (!vpif_obj.config->asd_sizes) {
1325                 i2c_adap = i2c_get_adapter(1);
1326                 for (i = 0; i < subdev_count; i++) {
1327                         vpif_obj.sd[i] =
1328                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1329                                                           i2c_adap,
1330                                                           &subdevdata[i].
1331                                                           board_info,
1332                                                           NULL);
1333                         if (!vpif_obj.sd[i]) {
1334                                 vpif_err("Error registering v4l2 subdevice\n");
1335                                 err = -ENODEV;
1336                                 goto probe_subdev_out;
1337                         }
1338 
1339                         if (vpif_obj.sd[i])
1340                                 vpif_obj.sd[i]->grp_id = 1 << i;
1341                 }
1342                 vpif_probe_complete();
1343         } else {
1344                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1345                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1346                 vpif_obj.notifier.bound = vpif_async_bound;
1347                 vpif_obj.notifier.complete = vpif_async_complete;
1348                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1349                                                    &vpif_obj.notifier);
1350                 if (err) {
1351                         vpif_err("Error registering async notifier\n");
1352                         err = -EINVAL;
1353                         goto probe_subdev_out;
1354                 }
1355         }
1356 
1357         return 0;
1358 
1359 probe_subdev_out:
1360         kfree(vpif_obj.sd);
1361 vpif_sd_error:
1362         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1363                 ch = vpif_obj.dev[i];
1364                 /* Note: does nothing if ch->video_dev == NULL */
1365                 video_device_release(ch->video_dev);
1366         }
1367 vpif_unregister:
1368         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1369 
1370         return err;
1371 }
1372 
1373 /*
1374  * vpif_remove: It un-register channels from V4L2 driver
1375  */
1376 static int vpif_remove(struct platform_device *device)
1377 {
1378         struct common_obj *common;
1379         struct channel_obj *ch;
1380         int i;
1381 
1382         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1383 
1384         kfree(vpif_obj.sd);
1385         /* un-register device */
1386         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1387                 /* Get the pointer to the channel object */
1388                 ch = vpif_obj.dev[i];
1389                 common = &ch->common[VPIF_VIDEO_INDEX];
1390                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1391                 /* Unregister video device */
1392                 video_unregister_device(ch->video_dev);
1393 
1394                 ch->video_dev = NULL;
1395                 kfree(vpif_obj.dev[i]);
1396         }
1397 
1398         return 0;
1399 }
1400 
1401 #ifdef CONFIG_PM_SLEEP
1402 static int vpif_suspend(struct device *dev)
1403 {
1404         struct common_obj *common;
1405         struct channel_obj *ch;
1406         int i;
1407 
1408         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1409                 /* Get the pointer to the channel object */
1410                 ch = vpif_obj.dev[i];
1411                 common = &ch->common[VPIF_VIDEO_INDEX];
1412 
1413                 if (!vb2_is_streaming(&common->buffer_queue))
1414                         continue;
1415 
1416                 mutex_lock(&common->lock);
1417                 /* Disable channel */
1418                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1419                         enable_channel2(0);
1420                         channel2_intr_enable(0);
1421                 }
1422                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1423                         ycmux_mode == 2) {
1424                         enable_channel3(0);
1425                         channel3_intr_enable(0);
1426                 }
1427                 mutex_unlock(&common->lock);
1428         }
1429 
1430         return 0;
1431 }
1432 
1433 static int vpif_resume(struct device *dev)
1434 {
1435 
1436         struct common_obj *common;
1437         struct channel_obj *ch;
1438         int i;
1439 
1440         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1441                 /* Get the pointer to the channel object */
1442                 ch = vpif_obj.dev[i];
1443                 common = &ch->common[VPIF_VIDEO_INDEX];
1444 
1445                 if (!vb2_is_streaming(&common->buffer_queue))
1446                         continue;
1447 
1448                 mutex_lock(&common->lock);
1449                 /* Enable channel */
1450                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1451                         enable_channel2(1);
1452                         channel2_intr_enable(1);
1453                 }
1454                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1455                                 ycmux_mode == 2) {
1456                         enable_channel3(1);
1457                         channel3_intr_enable(1);
1458                 }
1459                 mutex_unlock(&common->lock);
1460         }
1461 
1462         return 0;
1463 }
1464 
1465 #endif
1466 
1467 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1468 
1469 static __refdata struct platform_driver vpif_driver = {
1470         .driver = {
1471                         .name   = VPIF_DRIVER_NAME,
1472                         .owner  = THIS_MODULE,
1473                         .pm     = &vpif_pm_ops,
1474         },
1475         .probe  = vpif_probe,
1476         .remove = vpif_remove,
1477 };
1478 
1479 module_platform_driver(vpif_driver);
1480 

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