Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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
 57 struct vpif_disp_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
 58 {
 59         return container_of(vb, struct vpif_disp_buffer, vb);
 60 }
 61 
 62 /**
 63  * vpif_buffer_prepare :  callback function for buffer prepare
 64  * @vb: ptr to vb2_buffer
 65  *
 66  * This is the callback function for buffer prepare when vb2_qbuf()
 67  * function is called. The buffer is prepared and user space virtual address
 68  * or user address is converted into  physical address
 69  */
 70 static int vpif_buffer_prepare(struct vb2_buffer *vb)
 71 {
 72         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 73         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
 74         struct common_obj *common;
 75 
 76         common = &ch->common[VPIF_VIDEO_INDEX];
 77 
 78         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 79         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 80                 return -EINVAL;
 81 
 82         vbuf->field = common->fmt.fmt.pix.field;
 83 
 84         if (vb->vb2_queue->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
 85                 unsigned long addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 86 
 87                 if (!ISALIGNED(addr + common->ytop_off) ||
 88                         !ISALIGNED(addr + common->ybtm_off) ||
 89                         !ISALIGNED(addr + common->ctop_off) ||
 90                         !ISALIGNED(addr + common->cbtm_off)) {
 91                         vpif_err("buffer offset not aligned to 8 bytes\n");
 92                         return -EINVAL;
 93                 }
 94         }
 95 
 96         return 0;
 97 }
 98 
 99 /**
100  * vpif_buffer_queue_setup : Callback function for buffer setup.
101  * @vq: vb2_queue ptr
102  * @fmt: v4l2 format
103  * @nbuffers: ptr to number of buffers requested by application
104  * @nplanes:: contains number of distinct video planes needed to hold a frame
105  * @sizes[]: contains the size (in bytes) of each plane.
106  * @alloc_ctxs: ptr to allocation context
107  *
108  * This callback function is called when reqbuf() is called to adjust
109  * the buffer count and buffer size
110  */
111 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
112                                 const void *parg,
113                                 unsigned int *nbuffers, unsigned int *nplanes,
114                                 unsigned int sizes[], void *alloc_ctxs[])
115 {
116         const struct v4l2_format *fmt = parg;
117         struct channel_obj *ch = vb2_get_drv_priv(vq);
118         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
119 
120         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
121                 return -EINVAL;
122 
123         if (vq->num_buffers + *nbuffers < 3)
124                 *nbuffers = 3 - vq->num_buffers;
125 
126         *nplanes = 1;
127         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
128         alloc_ctxs[0] = common->alloc_ctx;
129 
130         /* Calculate the offset for Y and C data  in the buffer */
131         vpif_calculate_offsets(ch);
132 
133         return 0;
134 }
135 
136 /**
137  * vpif_buffer_queue : Callback function to add buffer to DMA queue
138  * @vb: ptr to vb2_buffer
139  *
140  * This callback fucntion queues the buffer to DMA engine
141  */
142 static void vpif_buffer_queue(struct vb2_buffer *vb)
143 {
144         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
145         struct vpif_disp_buffer *buf = to_vpif_buffer(vbuf);
146         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
147         struct common_obj *common;
148         unsigned long flags;
149 
150         common = &ch->common[VPIF_VIDEO_INDEX];
151 
152         /* add the buffer to the DMA queue */
153         spin_lock_irqsave(&common->irqlock, flags);
154         list_add_tail(&buf->list, &common->dma_queue);
155         spin_unlock_irqrestore(&common->irqlock, flags);
156 }
157 
158 /**
159  * vpif_start_streaming : Starts the DMA engine for streaming
160  * @vb: ptr to vb2_buffer
161  * @count: number of buffers
162  */
163 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
164 {
165         struct vpif_display_config *vpif_config_data =
166                                         vpif_dev->platform_data;
167         struct channel_obj *ch = vb2_get_drv_priv(vq);
168         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
169         struct vpif_params *vpif = &ch->vpifparams;
170         struct vpif_disp_buffer *buf, *tmp;
171         unsigned long addr, flags;
172         int ret;
173 
174         spin_lock_irqsave(&common->irqlock, flags);
175 
176         /* Initialize field_id */
177         ch->field_id = 0;
178 
179         /* clock settings */
180         if (vpif_config_data->set_clock) {
181                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
182                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
183                 if (ret < 0) {
184                         vpif_err("can't set clock\n");
185                         goto err;
186                 }
187         }
188 
189         /* set the parameters and addresses */
190         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
191         if (ret < 0)
192                 goto err;
193 
194         ycmux_mode = ret;
195         vpif_config_addr(ch, ret);
196         /* Get the next frame from the buffer queue */
197         common->next_frm = common->cur_frm =
198                             list_entry(common->dma_queue.next,
199                                        struct vpif_disp_buffer, list);
200 
201         list_del(&common->cur_frm->list);
202         spin_unlock_irqrestore(&common->irqlock, flags);
203 
204         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
205         common->set_addr((addr + common->ytop_off),
206                             (addr + common->ybtm_off),
207                             (addr + common->ctop_off),
208                             (addr + common->cbtm_off));
209 
210         /*
211          * Set interrupt for both the fields in VPIF
212          * Register enable channel in VPIF register
213          */
214         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
215         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
216                 channel2_intr_assert();
217                 channel2_intr_enable(1);
218                 enable_channel2(1);
219                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
220                         channel2_clipping_enable(1);
221         }
222 
223         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
224                 channel3_intr_assert();
225                 channel3_intr_enable(1);
226                 enable_channel3(1);
227                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
228                         channel3_clipping_enable(1);
229         }
230 
231         return 0;
232 
233 err:
234         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
235                 list_del(&buf->list);
236                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
237         }
238         spin_unlock_irqrestore(&common->irqlock, flags);
239 
240         return ret;
241 }
242 
243 /**
244  * vpif_stop_streaming : Stop the DMA engine
245  * @vq: ptr to vb2_queue
246  *
247  * This callback stops the DMA engine and any remaining buffers
248  * in the DMA queue are released.
249  */
250 static void vpif_stop_streaming(struct vb2_queue *vq)
251 {
252         struct channel_obj *ch = vb2_get_drv_priv(vq);
253         struct common_obj *common;
254         unsigned long flags;
255 
256         common = &ch->common[VPIF_VIDEO_INDEX];
257 
258         /* Disable channel */
259         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
260                 enable_channel2(0);
261                 channel2_intr_enable(0);
262         }
263         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
264                 enable_channel3(0);
265                 channel3_intr_enable(0);
266         }
267 
268         /* release all active buffers */
269         spin_lock_irqsave(&common->irqlock, flags);
270         if (common->cur_frm == common->next_frm) {
271                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
272                                 VB2_BUF_STATE_ERROR);
273         } else {
274                 if (common->cur_frm != NULL)
275                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
276                                         VB2_BUF_STATE_ERROR);
277                 if (common->next_frm != NULL)
278                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
279                                         VB2_BUF_STATE_ERROR);
280         }
281 
282         while (!list_empty(&common->dma_queue)) {
283                 common->next_frm = list_entry(common->dma_queue.next,
284                                                 struct vpif_disp_buffer, list);
285                 list_del(&common->next_frm->list);
286                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
287                                 VB2_BUF_STATE_ERROR);
288         }
289         spin_unlock_irqrestore(&common->irqlock, flags);
290 }
291 
292 static struct vb2_ops video_qops = {
293         .queue_setup            = vpif_buffer_queue_setup,
294         .wait_prepare           = vb2_ops_wait_prepare,
295         .wait_finish            = vb2_ops_wait_finish,
296         .buf_prepare            = vpif_buffer_prepare,
297         .start_streaming        = vpif_start_streaming,
298         .stop_streaming         = vpif_stop_streaming,
299         .buf_queue              = vpif_buffer_queue,
300 };
301 
302 static void process_progressive_mode(struct common_obj *common)
303 {
304         unsigned long addr = 0;
305 
306         spin_lock(&common->irqlock);
307         /* Get the next buffer from buffer queue */
308         common->next_frm = list_entry(common->dma_queue.next,
309                                 struct vpif_disp_buffer, list);
310         /* Remove that buffer from the buffer queue */
311         list_del(&common->next_frm->list);
312         spin_unlock(&common->irqlock);
313 
314         /* Set top and bottom field addrs in VPIF registers */
315         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
316         common->set_addr(addr + common->ytop_off,
317                                  addr + common->ybtm_off,
318                                  addr + common->ctop_off,
319                                  addr + common->cbtm_off);
320 }
321 
322 static void process_interlaced_mode(int fid, struct common_obj *common)
323 {
324         /* device field id and local field id are in sync */
325         /* If this is even field */
326         if (0 == fid) {
327                 if (common->cur_frm == common->next_frm)
328                         return;
329 
330                 /* one frame is displayed If next frame is
331                  *  available, release cur_frm and move on */
332                 /* Copy frame display time */
333                 v4l2_get_timestamp(&common->cur_frm->vb.timestamp);
334                 /* Change status of the cur_frm */
335                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
336                                         VB2_BUF_STATE_DONE);
337                 /* Make cur_frm pointing to next_frm */
338                 common->cur_frm = common->next_frm;
339 
340         } else if (1 == fid) {  /* odd field */
341                 spin_lock(&common->irqlock);
342                 if (list_empty(&common->dma_queue)
343                     || (common->cur_frm != common->next_frm)) {
344                         spin_unlock(&common->irqlock);
345                         return;
346                 }
347                 spin_unlock(&common->irqlock);
348                 /* one field is displayed configure the next
349                  * frame if it is available else hold on current
350                  * frame */
351                 /* Get next from the buffer queue */
352                 process_progressive_mode(common);
353         }
354 }
355 
356 /*
357  * vpif_channel_isr: It changes status of the displayed buffer, takes next
358  * buffer from the queue and sets its address in VPIF registers
359  */
360 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
361 {
362         struct vpif_device *dev = &vpif_obj;
363         struct channel_obj *ch;
364         struct common_obj *common;
365         int fid = -1, i;
366         int channel_id = 0;
367 
368         channel_id = *(int *)(dev_id);
369         if (!vpif_intr_status(channel_id + 2))
370                 return IRQ_NONE;
371 
372         ch = dev->dev[channel_id];
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(
390                                         &common->cur_frm->vb.timestamp);
391                                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
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, 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         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
520             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
521                 common->ytop_off = 0;
522                 common->ybtm_off = hpitch;
523                 common->ctop_off = sizeimage / 2;
524                 common->cbtm_off = sizeimage / 2 + hpitch;
525         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
526                 common->ytop_off = 0;
527                 common->ybtm_off = sizeimage / 4;
528                 common->ctop_off = sizeimage / 2;
529                 common->cbtm_off = common->ctop_off + sizeimage / 4;
530         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
531                 common->ybtm_off = 0;
532                 common->ytop_off = sizeimage / 4;
533                 common->cbtm_off = sizeimage / 2;
534                 common->ctop_off = common->cbtm_off + sizeimage / 4;
535         }
536 
537         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
538             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
539                 vpifparams->video_params.storage_mode = 1;
540         } else {
541                 vpifparams->video_params.storage_mode = 0;
542         }
543 
544         if (ch->vpifparams.std_info.frm_fmt == 1) {
545                 vpifparams->video_params.hpitch =
546                     common->fmt.fmt.pix.bytesperline;
547         } else {
548                 if ((field == V4L2_FIELD_ANY) ||
549                         (field == V4L2_FIELD_INTERLACED))
550                         vpifparams->video_params.hpitch =
551                             common->fmt.fmt.pix.bytesperline * 2;
552                 else
553                         vpifparams->video_params.hpitch =
554                             common->fmt.fmt.pix.bytesperline;
555         }
556 
557         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
558 }
559 
560 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
561 {
562         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
563 
564         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
565                 common->set_addr = ch3_set_videobuf_addr;
566         } else {
567                 if (2 == muxmode)
568                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
569                 else
570                         common->set_addr = ch2_set_videobuf_addr;
571         }
572 }
573 
574 /* functions implementing ioctls */
575 /**
576  * vpif_querycap() - QUERYCAP handler
577  * @file: file ptr
578  * @priv: file handle
579  * @cap: ptr to v4l2_capability structure
580  */
581 static int vpif_querycap(struct file *file, void  *priv,
582                                 struct v4l2_capability *cap)
583 {
584         struct vpif_display_config *config = vpif_dev->platform_data;
585 
586         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
587         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
588         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
589         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
590                  dev_name(vpif_dev));
591         strlcpy(cap->card, config->card_name, sizeof(cap->card));
592 
593         return 0;
594 }
595 
596 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
597                                         struct v4l2_fmtdesc *fmt)
598 {
599         if (fmt->index != 0)
600                 return -EINVAL;
601 
602         /* Fill in the information about format */
603         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
604         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
605         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
606         fmt->flags = 0;
607         return 0;
608 }
609 
610 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
611                                 struct v4l2_format *fmt)
612 {
613         struct video_device *vdev = video_devdata(file);
614         struct channel_obj *ch = video_get_drvdata(vdev);
615         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
616 
617         /* Check the validity of the buffer type */
618         if (common->fmt.type != fmt->type)
619                 return -EINVAL;
620 
621         if (vpif_update_resolution(ch))
622                 return -EINVAL;
623         *fmt = common->fmt;
624         return 0;
625 }
626 
627 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
628                                 struct v4l2_format *fmt)
629 {
630         struct video_device *vdev = video_devdata(file);
631         struct channel_obj *ch = video_get_drvdata(vdev);
632         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
633         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
634 
635         /*
636          * to supress v4l-compliance warnings silently correct
637          * the pixelformat
638          */
639         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
640                 pixfmt->pixelformat = common->fmt.fmt.pix.pixelformat;
641 
642         if (vpif_update_resolution(ch))
643                 return -EINVAL;
644 
645         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
646         pixfmt->field = common->fmt.fmt.pix.field;
647         pixfmt->bytesperline = common->fmt.fmt.pix.width;
648         pixfmt->width = common->fmt.fmt.pix.width;
649         pixfmt->height = common->fmt.fmt.pix.height;
650         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
651 
652         return 0;
653 }
654 
655 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
656                                 struct v4l2_format *fmt)
657 {
658         struct video_device *vdev = video_devdata(file);
659         struct channel_obj *ch = video_get_drvdata(vdev);
660         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
661         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
662         int ret;
663 
664         if (vb2_is_busy(&common->buffer_queue))
665                 return -EBUSY;
666 
667         ret = vpif_try_fmt_vid_out(file, priv, fmt);
668         if (ret)
669                 return ret;
670 
671         /* store the pix format in the channel object */
672         common->fmt.fmt.pix = *pixfmt;
673 
674         /* store the format in the channel object */
675         common->fmt = *fmt;
676         return 0;
677 }
678 
679 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
680 {
681         struct vpif_display_config *config = vpif_dev->platform_data;
682         struct video_device *vdev = video_devdata(file);
683         struct channel_obj *ch = video_get_drvdata(vdev);
684         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
685         struct vpif_display_chan_config *chan_cfg;
686         struct v4l2_output output;
687         int ret;
688 
689         if (config->chan_config[ch->channel_id].outputs == NULL)
690                 return -ENODATA;
691 
692         chan_cfg = &config->chan_config[ch->channel_id];
693         output = chan_cfg->outputs[ch->output_idx].output;
694         if (output.capabilities != V4L2_OUT_CAP_STD)
695                 return -ENODATA;
696 
697         if (vb2_is_busy(&common->buffer_queue))
698                 return -EBUSY;
699 
700 
701         if (!(std_id & VPIF_V4L2_STD))
702                 return -EINVAL;
703 
704         /* Call encoder subdevice function to set the standard */
705         ch->video.stdid = std_id;
706         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
707         /* Get the information about the standard */
708         if (vpif_update_resolution(ch))
709                 return -EINVAL;
710 
711         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
712 
713         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
714                                                 s_std_output, std_id);
715         if (ret < 0) {
716                 vpif_err("Failed to set output standard\n");
717                 return ret;
718         }
719 
720         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
721                                                         s_std, std_id);
722         if (ret < 0)
723                 vpif_err("Failed to set standard for sub devices\n");
724         return ret;
725 }
726 
727 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
728 {
729         struct vpif_display_config *config = vpif_dev->platform_data;
730         struct video_device *vdev = video_devdata(file);
731         struct channel_obj *ch = video_get_drvdata(vdev);
732         struct vpif_display_chan_config *chan_cfg;
733         struct v4l2_output output;
734 
735         if (config->chan_config[ch->channel_id].outputs == NULL)
736                 return -ENODATA;
737 
738         chan_cfg = &config->chan_config[ch->channel_id];
739         output = chan_cfg->outputs[ch->output_idx].output;
740         if (output.capabilities != V4L2_OUT_CAP_STD)
741                 return -ENODATA;
742 
743         *std = ch->video.stdid;
744         return 0;
745 }
746 
747 static int vpif_enum_output(struct file *file, void *fh,
748                                 struct v4l2_output *output)
749 {
750 
751         struct vpif_display_config *config = vpif_dev->platform_data;
752         struct video_device *vdev = video_devdata(file);
753         struct channel_obj *ch = video_get_drvdata(vdev);
754         struct vpif_display_chan_config *chan_cfg;
755 
756         chan_cfg = &config->chan_config[ch->channel_id];
757         if (output->index >= chan_cfg->output_count) {
758                 vpif_dbg(1, debug, "Invalid output index\n");
759                 return -EINVAL;
760         }
761 
762         *output = chan_cfg->outputs[output->index].output;
763         return 0;
764 }
765 
766 /**
767  * vpif_output_to_subdev() - Maps output to sub device
768  * @vpif_cfg - global config ptr
769  * @chan_cfg - channel config ptr
770  * @index - Given output index from application
771  *
772  * lookup the sub device information for a given output index.
773  * we report all the output to application. output table also
774  * has sub device name for the each output
775  */
776 static int
777 vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
778                       struct vpif_display_chan_config *chan_cfg, int index)
779 {
780         struct vpif_subdev_info *subdev_info;
781         const char *subdev_name;
782         int i;
783 
784         vpif_dbg(2, debug, "vpif_output_to_subdev\n");
785 
786         if (chan_cfg->outputs == NULL)
787                 return -1;
788 
789         subdev_name = chan_cfg->outputs[index].subdev_name;
790         if (subdev_name == NULL)
791                 return -1;
792 
793         /* loop through the sub device list to get the sub device info */
794         for (i = 0; i < vpif_cfg->subdev_count; i++) {
795                 subdev_info = &vpif_cfg->subdevinfo[i];
796                 if (!strcmp(subdev_info->name, subdev_name))
797                         return i;
798         }
799         return -1;
800 }
801 
802 /**
803  * vpif_set_output() - Select an output
804  * @vpif_cfg - global config ptr
805  * @ch - channel
806  * @index - Given output index from application
807  *
808  * Select the given output.
809  */
810 static int vpif_set_output(struct vpif_display_config *vpif_cfg,
811                       struct channel_obj *ch, int index)
812 {
813         struct vpif_display_chan_config *chan_cfg =
814                 &vpif_cfg->chan_config[ch->channel_id];
815         struct v4l2_subdev *sd = NULL;
816         u32 input = 0, output = 0;
817         int sd_index;
818         int ret;
819 
820         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
821         if (sd_index >= 0)
822                 sd = vpif_obj.sd[sd_index];
823 
824         if (sd) {
825                 input = chan_cfg->outputs[index].input_route;
826                 output = chan_cfg->outputs[index].output_route;
827                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
828                 if (ret < 0 && ret != -ENOIOCTLCMD) {
829                         vpif_err("Failed to set output\n");
830                         return ret;
831                 }
832 
833         }
834         ch->output_idx = index;
835         ch->sd = sd;
836         if (chan_cfg->outputs != NULL)
837                 /* update tvnorms from the sub device output info */
838                 ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
839         return 0;
840 }
841 
842 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
843 {
844         struct vpif_display_config *config = vpif_dev->platform_data;
845         struct video_device *vdev = video_devdata(file);
846         struct channel_obj *ch = video_get_drvdata(vdev);
847         struct vpif_display_chan_config *chan_cfg;
848         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
849 
850         if (vb2_is_busy(&common->buffer_queue))
851                 return -EBUSY;
852 
853         chan_cfg = &config->chan_config[ch->channel_id];
854 
855         if (i >= chan_cfg->output_count)
856                 return -EINVAL;
857 
858         return vpif_set_output(config, ch, i);
859 }
860 
861 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
862 {
863         struct video_device *vdev = video_devdata(file);
864         struct channel_obj *ch = video_get_drvdata(vdev);
865 
866         *i = ch->output_idx;
867 
868         return 0;
869 }
870 
871 /**
872  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
873  * @file: file ptr
874  * @priv: file handle
875  * @timings: input timings
876  */
877 static int
878 vpif_enum_dv_timings(struct file *file, void *priv,
879                      struct v4l2_enum_dv_timings *timings)
880 {
881         struct vpif_display_config *config = vpif_dev->platform_data;
882         struct video_device *vdev = video_devdata(file);
883         struct channel_obj *ch = video_get_drvdata(vdev);
884         struct vpif_display_chan_config *chan_cfg;
885         struct v4l2_output output;
886         int ret;
887 
888         if (config->chan_config[ch->channel_id].outputs == NULL)
889                 return -ENODATA;
890 
891         chan_cfg = &config->chan_config[ch->channel_id];
892         output = chan_cfg->outputs[ch->output_idx].output;
893         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
894                 return -ENODATA;
895 
896         timings->pad = 0;
897 
898         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
899         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
900                 return -EINVAL;
901         return ret;
902 }
903 
904 /**
905  * vpif_s_dv_timings() - S_DV_TIMINGS handler
906  * @file: file ptr
907  * @priv: file handle
908  * @timings: digital video timings
909  */
910 static int vpif_s_dv_timings(struct file *file, void *priv,
911                 struct v4l2_dv_timings *timings)
912 {
913         struct vpif_display_config *config = vpif_dev->platform_data;
914         struct video_device *vdev = video_devdata(file);
915         struct channel_obj *ch = video_get_drvdata(vdev);
916         struct vpif_params *vpifparams = &ch->vpifparams;
917         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
918         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
919         struct video_obj *vid_ch = &ch->video;
920         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
921         struct vpif_display_chan_config *chan_cfg;
922         struct v4l2_output output;
923         int ret;
924 
925         if (config->chan_config[ch->channel_id].outputs == NULL)
926                 return -ENODATA;
927 
928         chan_cfg = &config->chan_config[ch->channel_id];
929         output = chan_cfg->outputs[ch->output_idx].output;
930         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
931                 return -ENODATA;
932 
933         if (vb2_is_busy(&common->buffer_queue))
934                 return -EBUSY;
935 
936         if (timings->type != V4L2_DV_BT_656_1120) {
937                 vpif_dbg(2, debug, "Timing type not defined\n");
938                 return -EINVAL;
939         }
940 
941         /* Configure subdevice timings, if any */
942         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
943         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
944                 ret = 0;
945         if (ret < 0) {
946                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
947                 return ret;
948         }
949 
950         if (!(timings->bt.width && timings->bt.height &&
951                                 (timings->bt.hbackporch ||
952                                  timings->bt.hfrontporch ||
953                                  timings->bt.hsync) &&
954                                 timings->bt.vfrontporch &&
955                                 (timings->bt.vbackporch ||
956                                  timings->bt.vsync))) {
957                 vpif_dbg(2, debug, "Timings for width, height, "
958                                 "horizontal back porch, horizontal sync, "
959                                 "horizontal front porch, vertical back porch, "
960                                 "vertical sync and vertical back porch "
961                                 "must be defined\n");
962                 return -EINVAL;
963         }
964 
965         vid_ch->dv_timings = *timings;
966 
967         /* Configure video port timings */
968 
969         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
970         std_info->sav2eav = bt->width;
971 
972         std_info->l1 = 1;
973         std_info->l3 = bt->vsync + bt->vbackporch + 1;
974 
975         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
976         if (bt->interlaced) {
977                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
978                         std_info->l5 = std_info->vsize/2 -
979                                 (bt->vfrontporch - 1);
980                         std_info->l7 = std_info->vsize/2 + 1;
981                         std_info->l9 = std_info->l7 + bt->il_vsync +
982                                 bt->il_vbackporch + 1;
983                         std_info->l11 = std_info->vsize -
984                                 (bt->il_vfrontporch - 1);
985                 } else {
986                         vpif_dbg(2, debug, "Required timing values for "
987                                         "interlaced BT format missing\n");
988                         return -EINVAL;
989                 }
990         } else {
991                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
992         }
993         strncpy(std_info->name, "Custom timings BT656/1120",
994                         VPIF_MAX_NAME);
995         std_info->width = bt->width;
996         std_info->height = bt->height;
997         std_info->frm_fmt = bt->interlaced ? 0 : 1;
998         std_info->ycmux_mode = 0;
999         std_info->capture_format = 0;
1000         std_info->vbi_supported = 0;
1001         std_info->hd_sd = 1;
1002         std_info->stdid = 0;
1003         vid_ch->stdid = 0;
1004 
1005         return 0;
1006 }
1007 
1008 /**
1009  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1010  * @file: file ptr
1011  * @priv: file handle
1012  * @timings: digital video timings
1013  */
1014 static int vpif_g_dv_timings(struct file *file, void *priv,
1015                 struct v4l2_dv_timings *timings)
1016 {
1017         struct vpif_display_config *config = vpif_dev->platform_data;
1018         struct video_device *vdev = video_devdata(file);
1019         struct channel_obj *ch = video_get_drvdata(vdev);
1020         struct vpif_display_chan_config *chan_cfg;
1021         struct video_obj *vid_ch = &ch->video;
1022         struct v4l2_output output;
1023 
1024         if (config->chan_config[ch->channel_id].outputs == NULL)
1025                 goto error;
1026 
1027         chan_cfg = &config->chan_config[ch->channel_id];
1028         output = chan_cfg->outputs[ch->output_idx].output;
1029 
1030         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1031                 goto error;
1032 
1033         *timings = vid_ch->dv_timings;
1034 
1035         return 0;
1036 error:
1037         return -ENODATA;
1038 }
1039 
1040 /*
1041  * vpif_log_status() - Status information
1042  * @file: file ptr
1043  * @priv: file handle
1044  *
1045  * Returns zero.
1046  */
1047 static int vpif_log_status(struct file *filep, void *priv)
1048 {
1049         /* status for sub devices */
1050         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1051 
1052         return 0;
1053 }
1054 
1055 /* vpif display ioctl operations */
1056 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1057         .vidioc_querycap                = vpif_querycap,
1058         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1059         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1060         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1061         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1062 
1063         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1064         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1065         .vidioc_querybuf                = vb2_ioctl_querybuf,
1066         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1067         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1068         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1069         .vidioc_streamon                = vb2_ioctl_streamon,
1070         .vidioc_streamoff               = vb2_ioctl_streamoff,
1071 
1072         .vidioc_s_std                   = vpif_s_std,
1073         .vidioc_g_std                   = vpif_g_std,
1074 
1075         .vidioc_enum_output             = vpif_enum_output,
1076         .vidioc_s_output                = vpif_s_output,
1077         .vidioc_g_output                = vpif_g_output,
1078 
1079         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1080         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1081         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1082 
1083         .vidioc_log_status              = vpif_log_status,
1084 };
1085 
1086 static const struct v4l2_file_operations vpif_fops = {
1087         .owner          = THIS_MODULE,
1088         .open           = v4l2_fh_open,
1089         .release        = vb2_fop_release,
1090         .unlocked_ioctl = video_ioctl2,
1091         .mmap           = vb2_fop_mmap,
1092         .poll           = vb2_fop_poll
1093 };
1094 
1095 /*Configure the channels, buffer sizei, request irq */
1096 static int initialize_vpif(void)
1097 {
1098         int free_channel_objects_index;
1099         int err, i, j;
1100 
1101         /* Allocate memory for six channel objects */
1102         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1103                 vpif_obj.dev[i] =
1104                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1105                 /* If memory allocation fails, return error */
1106                 if (!vpif_obj.dev[i]) {
1107                         free_channel_objects_index = i;
1108                         err = -ENOMEM;
1109                         goto vpif_init_free_channel_objects;
1110                 }
1111         }
1112 
1113         return 0;
1114 
1115 vpif_init_free_channel_objects:
1116         for (j = 0; j < free_channel_objects_index; j++)
1117                 kfree(vpif_obj.dev[j]);
1118         return err;
1119 }
1120 
1121 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1122                             struct v4l2_subdev *subdev,
1123                             struct v4l2_async_subdev *asd)
1124 {
1125         int i;
1126 
1127         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1128                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1129                             subdev->name)) {
1130                         vpif_obj.sd[i] = subdev;
1131                         vpif_obj.sd[i]->grp_id = 1 << i;
1132                         return 0;
1133                 }
1134 
1135         return -EINVAL;
1136 }
1137 
1138 static int vpif_probe_complete(void)
1139 {
1140         struct common_obj *common;
1141         struct video_device *vdev;
1142         struct channel_obj *ch;
1143         struct vb2_queue *q;
1144         int j, err, k;
1145 
1146         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1147                 ch = vpif_obj.dev[j];
1148                 /* Initialize field of the channel objects */
1149                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1150                         common = &ch->common[k];
1151                         spin_lock_init(&common->irqlock);
1152                         mutex_init(&common->lock);
1153                         common->set_addr = NULL;
1154                         common->ytop_off = 0;
1155                         common->ybtm_off = 0;
1156                         common->ctop_off = 0;
1157                         common->cbtm_off = 0;
1158                         common->cur_frm = NULL;
1159                         common->next_frm = NULL;
1160                         memset(&common->fmt, 0, sizeof(common->fmt));
1161                 }
1162                 ch->initialized = 0;
1163                 if (vpif_obj.config->subdev_count)
1164                         ch->sd = vpif_obj.sd[0];
1165                 ch->channel_id = j;
1166 
1167                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1168 
1169                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1170                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1171 
1172                 /* select output 0 */
1173                 err = vpif_set_output(vpif_obj.config, ch, 0);
1174                 if (err)
1175                         goto probe_out;
1176 
1177                 /* set initial format */
1178                 ch->video.stdid = V4L2_STD_525_60;
1179                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1180                 vpif_update_resolution(ch);
1181 
1182                 /* Initialize vb2 queue */
1183                 q = &common->buffer_queue;
1184                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1185                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1186                 q->drv_priv = ch;
1187                 q->ops = &video_qops;
1188                 q->mem_ops = &vb2_dma_contig_memops;
1189                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1190                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1191                 q->min_buffers_needed = 1;
1192                 q->lock = &common->lock;
1193                 err = vb2_queue_init(q);
1194                 if (err) {
1195                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1196                         goto probe_out;
1197                 }
1198 
1199                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1200                 if (IS_ERR(common->alloc_ctx)) {
1201                         vpif_err("Failed to get the context\n");
1202                         err = PTR_ERR(common->alloc_ctx);
1203                         goto probe_out;
1204                 }
1205 
1206                 INIT_LIST_HEAD(&common->dma_queue);
1207 
1208                 /* register video device */
1209                 vpif_dbg(1, debug, "channel=%p,channel->video_dev=%p\n",
1210                          ch, &ch->video_dev);
1211 
1212                 /* Initialize the video_device structure */
1213                 vdev = &ch->video_dev;
1214                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1215                 vdev->release = video_device_release_empty;
1216                 vdev->fops = &vpif_fops;
1217                 vdev->ioctl_ops = &vpif_ioctl_ops;
1218                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1219                 vdev->vfl_dir = VFL_DIR_TX;
1220                 vdev->queue = q;
1221                 vdev->lock = &common->lock;
1222                 video_set_drvdata(&ch->video_dev, ch);
1223                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1224                                             (j ? 3 : 2));
1225                 if (err < 0)
1226                         goto probe_out;
1227         }
1228 
1229         return 0;
1230 
1231 probe_out:
1232         for (k = 0; k < j; k++) {
1233                 ch = vpif_obj.dev[k];
1234                 common = &ch->common[k];
1235                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1236                 video_unregister_device(&ch->video_dev);
1237         }
1238         return err;
1239 }
1240 
1241 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1242 {
1243         return vpif_probe_complete();
1244 }
1245 
1246 /*
1247  * vpif_probe: This function creates device entries by register itself to the
1248  * V4L2 driver and initializes fields of each channel objects
1249  */
1250 static __init int vpif_probe(struct platform_device *pdev)
1251 {
1252         struct vpif_subdev_info *subdevdata;
1253         struct i2c_adapter *i2c_adap;
1254         struct resource *res;
1255         int subdev_count;
1256         int res_idx = 0;
1257         int i, err;
1258 
1259         vpif_dev = &pdev->dev;
1260         err = initialize_vpif();
1261 
1262         if (err) {
1263                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1264                 return err;
1265         }
1266 
1267         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1268         if (err) {
1269                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1270                 return err;
1271         }
1272 
1273         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1274                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1275                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1276                                         (void *)(&vpif_obj.dev[res_idx]->
1277                                         channel_id));
1278                 if (err) {
1279                         err = -EINVAL;
1280                         vpif_err("VPIF IRQ request failed\n");
1281                         goto vpif_unregister;
1282                 }
1283                 res_idx++;
1284         }
1285 
1286         vpif_obj.config = pdev->dev.platform_data;
1287         subdev_count = vpif_obj.config->subdev_count;
1288         subdevdata = vpif_obj.config->subdevinfo;
1289         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1290                                                                 GFP_KERNEL);
1291         if (vpif_obj.sd == NULL) {
1292                 vpif_err("unable to allocate memory for subdevice pointers\n");
1293                 err = -ENOMEM;
1294                 goto vpif_unregister;
1295         }
1296 
1297         if (!vpif_obj.config->asd_sizes) {
1298                 i2c_adap = i2c_get_adapter(1);
1299                 for (i = 0; i < subdev_count; i++) {
1300                         vpif_obj.sd[i] =
1301                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1302                                                           i2c_adap,
1303                                                           &subdevdata[i].
1304                                                           board_info,
1305                                                           NULL);
1306                         if (!vpif_obj.sd[i]) {
1307                                 vpif_err("Error registering v4l2 subdevice\n");
1308                                 err = -ENODEV;
1309                                 goto probe_subdev_out;
1310                         }
1311 
1312                         if (vpif_obj.sd[i])
1313                                 vpif_obj.sd[i]->grp_id = 1 << i;
1314                 }
1315                 vpif_probe_complete();
1316         } else {
1317                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1318                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1319                 vpif_obj.notifier.bound = vpif_async_bound;
1320                 vpif_obj.notifier.complete = vpif_async_complete;
1321                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1322                                                    &vpif_obj.notifier);
1323                 if (err) {
1324                         vpif_err("Error registering async notifier\n");
1325                         err = -EINVAL;
1326                         goto probe_subdev_out;
1327                 }
1328         }
1329 
1330         return 0;
1331 
1332 probe_subdev_out:
1333         kfree(vpif_obj.sd);
1334 vpif_unregister:
1335         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1336 
1337         return err;
1338 }
1339 
1340 /*
1341  * vpif_remove: It un-register channels from V4L2 driver
1342  */
1343 static int vpif_remove(struct platform_device *device)
1344 {
1345         struct common_obj *common;
1346         struct channel_obj *ch;
1347         int i;
1348 
1349         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1350 
1351         kfree(vpif_obj.sd);
1352         /* un-register device */
1353         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1354                 /* Get the pointer to the channel object */
1355                 ch = vpif_obj.dev[i];
1356                 common = &ch->common[VPIF_VIDEO_INDEX];
1357                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1358                 /* Unregister video device */
1359                 video_unregister_device(&ch->video_dev);
1360                 kfree(vpif_obj.dev[i]);
1361         }
1362 
1363         return 0;
1364 }
1365 
1366 #ifdef CONFIG_PM_SLEEP
1367 static int vpif_suspend(struct device *dev)
1368 {
1369         struct common_obj *common;
1370         struct channel_obj *ch;
1371         int i;
1372 
1373         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1374                 /* Get the pointer to the channel object */
1375                 ch = vpif_obj.dev[i];
1376                 common = &ch->common[VPIF_VIDEO_INDEX];
1377 
1378                 if (!vb2_start_streaming_called(&common->buffer_queue))
1379                         continue;
1380 
1381                 mutex_lock(&common->lock);
1382                 /* Disable channel */
1383                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1384                         enable_channel2(0);
1385                         channel2_intr_enable(0);
1386                 }
1387                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1388                         ycmux_mode == 2) {
1389                         enable_channel3(0);
1390                         channel3_intr_enable(0);
1391                 }
1392                 mutex_unlock(&common->lock);
1393         }
1394 
1395         return 0;
1396 }
1397 
1398 static int vpif_resume(struct device *dev)
1399 {
1400 
1401         struct common_obj *common;
1402         struct channel_obj *ch;
1403         int i;
1404 
1405         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1406                 /* Get the pointer to the channel object */
1407                 ch = vpif_obj.dev[i];
1408                 common = &ch->common[VPIF_VIDEO_INDEX];
1409 
1410                 if (!vb2_start_streaming_called(&common->buffer_queue))
1411                         continue;
1412 
1413                 mutex_lock(&common->lock);
1414                 /* Enable channel */
1415                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1416                         enable_channel2(1);
1417                         channel2_intr_enable(1);
1418                 }
1419                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1420                                 ycmux_mode == 2) {
1421                         enable_channel3(1);
1422                         channel3_intr_enable(1);
1423                 }
1424                 mutex_unlock(&common->lock);
1425         }
1426 
1427         return 0;
1428 }
1429 
1430 #endif
1431 
1432 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1433 
1434 static __refdata struct platform_driver vpif_driver = {
1435         .driver = {
1436                         .name   = VPIF_DRIVER_NAME,
1437                         .pm     = &vpif_pm_ops,
1438         },
1439         .probe  = vpif_probe,
1440         .remove = vpif_remove,
1441 };
1442 
1443 module_platform_driver(vpif_driver);
1444 

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