Version:  2.0.40 2.2.26 2.4.37 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 4.5 4.6

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  * @nbuffers: ptr to number of buffers requested by application
103  * @nplanes:: contains number of distinct video planes needed to hold a frame
104  * @sizes[]: contains the size (in bytes) of each plane.
105  * @alloc_ctxs: ptr to allocation context
106  *
107  * This callback function is called when reqbuf() is called to adjust
108  * the buffer count and buffer size
109  */
110 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
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         unsigned size = common->fmt.fmt.pix.sizeimage;
117 
118         if (*nplanes) {
119                 if (sizes[0] < size)
120                         return -EINVAL;
121                 size = sizes[0];
122         }
123 
124         if (vq->num_buffers + *nbuffers < 3)
125                 *nbuffers = 3 - vq->num_buffers;
126 
127         *nplanes = 1;
128         sizes[0] = size;
129         alloc_ctxs[0] = common->alloc_ctx;
130 
131         /* Calculate the offset for Y and C data  in the buffer */
132         vpif_calculate_offsets(ch);
133 
134         return 0;
135 }
136 
137 /**
138  * vpif_buffer_queue : Callback function to add buffer to DMA queue
139  * @vb: ptr to vb2_buffer
140  *
141  * This callback fucntion queues the buffer to DMA engine
142  */
143 static void vpif_buffer_queue(struct vb2_buffer *vb)
144 {
145         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
146         struct vpif_disp_buffer *buf = to_vpif_buffer(vbuf);
147         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
148         struct common_obj *common;
149         unsigned long flags;
150 
151         common = &ch->common[VPIF_VIDEO_INDEX];
152 
153         /* add the buffer to the DMA queue */
154         spin_lock_irqsave(&common->irqlock, flags);
155         list_add_tail(&buf->list, &common->dma_queue);
156         spin_unlock_irqrestore(&common->irqlock, flags);
157 }
158 
159 /**
160  * vpif_start_streaming : Starts the DMA engine for streaming
161  * @vb: ptr to vb2_buffer
162  * @count: number of buffers
163  */
164 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
165 {
166         struct vpif_display_config *vpif_config_data =
167                                         vpif_dev->platform_data;
168         struct channel_obj *ch = vb2_get_drv_priv(vq);
169         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
170         struct vpif_params *vpif = &ch->vpifparams;
171         struct vpif_disp_buffer *buf, *tmp;
172         unsigned long addr, flags;
173         int ret;
174 
175         spin_lock_irqsave(&common->irqlock, flags);
176 
177         /* Initialize field_id */
178         ch->field_id = 0;
179 
180         /* clock settings */
181         if (vpif_config_data->set_clock) {
182                 ret = vpif_config_data->set_clock(ch->vpifparams.std_info.
183                 ycmux_mode, ch->vpifparams.std_info.hd_sd);
184                 if (ret < 0) {
185                         vpif_err("can't set clock\n");
186                         goto err;
187                 }
188         }
189 
190         /* set the parameters and addresses */
191         ret = vpif_set_video_params(vpif, ch->channel_id + 2);
192         if (ret < 0)
193                 goto err;
194 
195         ycmux_mode = ret;
196         vpif_config_addr(ch, ret);
197         /* Get the next frame from the buffer queue */
198         common->next_frm = common->cur_frm =
199                             list_entry(common->dma_queue.next,
200                                        struct vpif_disp_buffer, list);
201 
202         list_del(&common->cur_frm->list);
203         spin_unlock_irqrestore(&common->irqlock, flags);
204 
205         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
206         common->set_addr((addr + common->ytop_off),
207                             (addr + common->ybtm_off),
208                             (addr + common->ctop_off),
209                             (addr + common->cbtm_off));
210 
211         /*
212          * Set interrupt for both the fields in VPIF
213          * Register enable channel in VPIF register
214          */
215         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
216         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
217                 channel2_intr_assert();
218                 channel2_intr_enable(1);
219                 enable_channel2(1);
220                 if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
221                         channel2_clipping_enable(1);
222         }
223 
224         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
225                 channel3_intr_assert();
226                 channel3_intr_enable(1);
227                 enable_channel3(1);
228                 if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
229                         channel3_clipping_enable(1);
230         }
231 
232         return 0;
233 
234 err:
235         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
236                 list_del(&buf->list);
237                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
238         }
239         spin_unlock_irqrestore(&common->irqlock, flags);
240 
241         return ret;
242 }
243 
244 /**
245  * vpif_stop_streaming : Stop the DMA engine
246  * @vq: ptr to vb2_queue
247  *
248  * This callback stops the DMA engine and any remaining buffers
249  * in the DMA queue are released.
250  */
251 static void vpif_stop_streaming(struct vb2_queue *vq)
252 {
253         struct channel_obj *ch = vb2_get_drv_priv(vq);
254         struct common_obj *common;
255         unsigned long flags;
256 
257         common = &ch->common[VPIF_VIDEO_INDEX];
258 
259         /* Disable channel */
260         if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
261                 enable_channel2(0);
262                 channel2_intr_enable(0);
263         }
264         if (VPIF_CHANNEL3_VIDEO == ch->channel_id || ycmux_mode == 2) {
265                 enable_channel3(0);
266                 channel3_intr_enable(0);
267         }
268 
269         /* release all active buffers */
270         spin_lock_irqsave(&common->irqlock, flags);
271         if (common->cur_frm == common->next_frm) {
272                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
273                                 VB2_BUF_STATE_ERROR);
274         } else {
275                 if (common->cur_frm != NULL)
276                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
277                                         VB2_BUF_STATE_ERROR);
278                 if (common->next_frm != NULL)
279                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
280                                         VB2_BUF_STATE_ERROR);
281         }
282 
283         while (!list_empty(&common->dma_queue)) {
284                 common->next_frm = list_entry(common->dma_queue.next,
285                                                 struct vpif_disp_buffer, list);
286                 list_del(&common->next_frm->list);
287                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
288                                 VB2_BUF_STATE_ERROR);
289         }
290         spin_unlock_irqrestore(&common->irqlock, flags);
291 }
292 
293 static struct vb2_ops video_qops = {
294         .queue_setup            = vpif_buffer_queue_setup,
295         .wait_prepare           = vb2_ops_wait_prepare,
296         .wait_finish            = vb2_ops_wait_finish,
297         .buf_prepare            = vpif_buffer_prepare,
298         .start_streaming        = vpif_start_streaming,
299         .stop_streaming         = vpif_stop_streaming,
300         .buf_queue              = vpif_buffer_queue,
301 };
302 
303 static void process_progressive_mode(struct common_obj *common)
304 {
305         unsigned long addr = 0;
306 
307         spin_lock(&common->irqlock);
308         /* Get the next buffer from buffer queue */
309         common->next_frm = list_entry(common->dma_queue.next,
310                                 struct vpif_disp_buffer, list);
311         /* Remove that buffer from the buffer queue */
312         list_del(&common->next_frm->list);
313         spin_unlock(&common->irqlock);
314 
315         /* Set top and bottom field addrs in VPIF registers */
316         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
317         common->set_addr(addr + common->ytop_off,
318                                  addr + common->ybtm_off,
319                                  addr + common->ctop_off,
320                                  addr + common->cbtm_off);
321 }
322 
323 static void process_interlaced_mode(int fid, struct common_obj *common)
324 {
325         /* device field id and local field id are in sync */
326         /* If this is even field */
327         if (0 == fid) {
328                 if (common->cur_frm == common->next_frm)
329                         return;
330 
331                 /* one frame is displayed If next frame is
332                  *  available, release cur_frm and move on */
333                 /* Copy frame display time */
334                 common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
335                 /* Change status of the cur_frm */
336                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
337                                         VB2_BUF_STATE_DONE);
338                 /* Make cur_frm pointing to next_frm */
339                 common->cur_frm = common->next_frm;
340 
341         } else if (1 == fid) {  /* odd field */
342                 spin_lock(&common->irqlock);
343                 if (list_empty(&common->dma_queue)
344                     || (common->cur_frm != common->next_frm)) {
345                         spin_unlock(&common->irqlock);
346                         return;
347                 }
348                 spin_unlock(&common->irqlock);
349                 /* one field is displayed configure the next
350                  * frame if it is available else hold on current
351                  * frame */
352                 /* Get next from the buffer queue */
353                 process_progressive_mode(common);
354         }
355 }
356 
357 /*
358  * vpif_channel_isr: It changes status of the displayed buffer, takes next
359  * buffer from the queue and sets its address in VPIF registers
360  */
361 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
362 {
363         struct vpif_device *dev = &vpif_obj;
364         struct channel_obj *ch;
365         struct common_obj *common;
366         int fid = -1, i;
367         int channel_id = 0;
368 
369         channel_id = *(int *)(dev_id);
370         if (!vpif_intr_status(channel_id + 2))
371                 return IRQ_NONE;
372 
373         ch = dev->dev[channel_id];
374         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
375                 common = &ch->common[i];
376                 /* If streaming is started in this channel */
377 
378                 if (1 == ch->vpifparams.std_info.frm_fmt) {
379                         spin_lock(&common->irqlock);
380                         if (list_empty(&common->dma_queue)) {
381                                 spin_unlock(&common->irqlock);
382                                 continue;
383                         }
384                         spin_unlock(&common->irqlock);
385 
386                         /* Progressive mode */
387                         if (!channel_first_int[i][channel_id]) {
388                                 /* Mark status of the cur_frm to
389                                  * done and unlock semaphore on it */
390                                 common->cur_frm->vb.vb2_buf.timestamp =
391                                                 ktime_get_ns();
392                                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
393                                                 VB2_BUF_STATE_DONE);
394                                 /* Make cur_frm pointing to next_frm */
395                                 common->cur_frm = common->next_frm;
396                         }
397 
398                         channel_first_int[i][channel_id] = 0;
399                         process_progressive_mode(common);
400                 } else {
401                         /* Interlaced mode */
402                         /* If it is first interrupt, ignore it */
403 
404                         if (channel_first_int[i][channel_id]) {
405                                 channel_first_int[i][channel_id] = 0;
406                                 continue;
407                         }
408 
409                         if (0 == i) {
410                                 ch->field_id ^= 1;
411                                 /* Get field id from VPIF registers */
412                                 fid = vpif_channel_getfid(ch->channel_id + 2);
413                                 /* If fid does not match with stored field id */
414                                 if (fid != ch->field_id) {
415                                         /* Make them in sync */
416                                         if (0 == fid)
417                                                 ch->field_id = fid;
418 
419                                         return IRQ_HANDLED;
420                                 }
421                         }
422                         process_interlaced_mode(fid, common);
423                 }
424         }
425 
426         return IRQ_HANDLED;
427 }
428 
429 static int vpif_update_std_info(struct channel_obj *ch)
430 {
431         struct video_obj *vid_ch = &ch->video;
432         struct vpif_params *vpifparams = &ch->vpifparams;
433         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
434         const struct vpif_channel_config_params *config;
435 
436         int i;
437 
438         for (i = 0; i < vpif_ch_params_count; i++) {
439                 config = &vpif_ch_params[i];
440                 if (config->hd_sd == 0) {
441                         vpif_dbg(2, debug, "SD format\n");
442                         if (config->stdid & vid_ch->stdid) {
443                                 memcpy(std_info, config, sizeof(*config));
444                                 break;
445                         }
446                 }
447         }
448 
449         if (i == vpif_ch_params_count) {
450                 vpif_dbg(1, debug, "Format not found\n");
451                 return -EINVAL;
452         }
453 
454         return 0;
455 }
456 
457 static int vpif_update_resolution(struct channel_obj *ch)
458 {
459         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
460         struct video_obj *vid_ch = &ch->video;
461         struct vpif_params *vpifparams = &ch->vpifparams;
462         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
463 
464         if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
465                 return -EINVAL;
466 
467         if (vid_ch->stdid) {
468                 if (vpif_update_std_info(ch))
469                         return -EINVAL;
470         }
471 
472         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
473         common->fmt.fmt.pix.width = std_info->width;
474         common->fmt.fmt.pix.height = std_info->height;
475         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
476                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
477 
478         /* Set height and width paramateres */
479         common->height = std_info->height;
480         common->width = std_info->width;
481         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
482 
483         if (vid_ch->stdid)
484                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
485         else
486                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
487 
488         if (ch->vpifparams.std_info.frm_fmt)
489                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
490         else
491                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
492 
493         return 0;
494 }
495 
496 /*
497  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
498  * in the top and bottom field
499  */
500 static void vpif_calculate_offsets(struct channel_obj *ch)
501 {
502         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
503         struct vpif_params *vpifparams = &ch->vpifparams;
504         enum v4l2_field field = common->fmt.fmt.pix.field;
505         struct video_obj *vid_ch = &ch->video;
506         unsigned int hpitch, sizeimage;
507 
508         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
509                 if (ch->vpifparams.std_info.frm_fmt)
510                         vid_ch->buf_field = V4L2_FIELD_NONE;
511                 else
512                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
513         } else {
514                 vid_ch->buf_field = common->fmt.fmt.pix.field;
515         }
516 
517         sizeimage = common->fmt.fmt.pix.sizeimage;
518 
519         hpitch = common->fmt.fmt.pix.bytesperline;
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 v4l2_subdev *sd = NULL;
817         u32 input = 0, output = 0;
818         int sd_index;
819         int ret;
820 
821         sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
822         if (sd_index >= 0)
823                 sd = vpif_obj.sd[sd_index];
824 
825         if (sd) {
826                 input = chan_cfg->outputs[index].input_route;
827                 output = chan_cfg->outputs[index].output_route;
828                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
829                 if (ret < 0 && ret != -ENOIOCTLCMD) {
830                         vpif_err("Failed to set output\n");
831                         return ret;
832                 }
833 
834         }
835         ch->output_idx = index;
836         ch->sd = sd;
837         if (chan_cfg->outputs != NULL)
838                 /* update tvnorms from the sub device output info */
839                 ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
840         return 0;
841 }
842 
843 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
844 {
845         struct vpif_display_config *config = vpif_dev->platform_data;
846         struct video_device *vdev = video_devdata(file);
847         struct channel_obj *ch = video_get_drvdata(vdev);
848         struct vpif_display_chan_config *chan_cfg;
849         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
850 
851         if (vb2_is_busy(&common->buffer_queue))
852                 return -EBUSY;
853 
854         chan_cfg = &config->chan_config[ch->channel_id];
855 
856         if (i >= chan_cfg->output_count)
857                 return -EINVAL;
858 
859         return vpif_set_output(config, ch, i);
860 }
861 
862 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
863 {
864         struct video_device *vdev = video_devdata(file);
865         struct channel_obj *ch = video_get_drvdata(vdev);
866 
867         *i = ch->output_idx;
868 
869         return 0;
870 }
871 
872 /**
873  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
874  * @file: file ptr
875  * @priv: file handle
876  * @timings: input timings
877  */
878 static int
879 vpif_enum_dv_timings(struct file *file, void *priv,
880                      struct v4l2_enum_dv_timings *timings)
881 {
882         struct vpif_display_config *config = vpif_dev->platform_data;
883         struct video_device *vdev = video_devdata(file);
884         struct channel_obj *ch = video_get_drvdata(vdev);
885         struct vpif_display_chan_config *chan_cfg;
886         struct v4l2_output output;
887         int ret;
888 
889         if (config->chan_config[ch->channel_id].outputs == NULL)
890                 return -ENODATA;
891 
892         chan_cfg = &config->chan_config[ch->channel_id];
893         output = chan_cfg->outputs[ch->output_idx].output;
894         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
895                 return -ENODATA;
896 
897         timings->pad = 0;
898 
899         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
900         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
901                 return -EINVAL;
902         return ret;
903 }
904 
905 /**
906  * vpif_s_dv_timings() - S_DV_TIMINGS handler
907  * @file: file ptr
908  * @priv: file handle
909  * @timings: digital video timings
910  */
911 static int vpif_s_dv_timings(struct file *file, void *priv,
912                 struct v4l2_dv_timings *timings)
913 {
914         struct vpif_display_config *config = vpif_dev->platform_data;
915         struct video_device *vdev = video_devdata(file);
916         struct channel_obj *ch = video_get_drvdata(vdev);
917         struct vpif_params *vpifparams = &ch->vpifparams;
918         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
919         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
920         struct video_obj *vid_ch = &ch->video;
921         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
922         struct vpif_display_chan_config *chan_cfg;
923         struct v4l2_output output;
924         int ret;
925 
926         if (config->chan_config[ch->channel_id].outputs == NULL)
927                 return -ENODATA;
928 
929         chan_cfg = &config->chan_config[ch->channel_id];
930         output = chan_cfg->outputs[ch->output_idx].output;
931         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
932                 return -ENODATA;
933 
934         if (vb2_is_busy(&common->buffer_queue))
935                 return -EBUSY;
936 
937         if (timings->type != V4L2_DV_BT_656_1120) {
938                 vpif_dbg(2, debug, "Timing type not defined\n");
939                 return -EINVAL;
940         }
941 
942         /* Configure subdevice timings, if any */
943         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
944         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
945                 ret = 0;
946         if (ret < 0) {
947                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
948                 return ret;
949         }
950 
951         if (!(timings->bt.width && timings->bt.height &&
952                                 (timings->bt.hbackporch ||
953                                  timings->bt.hfrontporch ||
954                                  timings->bt.hsync) &&
955                                 timings->bt.vfrontporch &&
956                                 (timings->bt.vbackporch ||
957                                  timings->bt.vsync))) {
958                 vpif_dbg(2, debug, "Timings for width, height, "
959                                 "horizontal back porch, horizontal sync, "
960                                 "horizontal front porch, vertical back porch, "
961                                 "vertical sync and vertical back porch "
962                                 "must be defined\n");
963                 return -EINVAL;
964         }
965 
966         vid_ch->dv_timings = *timings;
967 
968         /* Configure video port timings */
969 
970         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
971         std_info->sav2eav = bt->width;
972 
973         std_info->l1 = 1;
974         std_info->l3 = bt->vsync + bt->vbackporch + 1;
975 
976         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
977         if (bt->interlaced) {
978                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
979                         std_info->l5 = std_info->vsize/2 -
980                                 (bt->vfrontporch - 1);
981                         std_info->l7 = std_info->vsize/2 + 1;
982                         std_info->l9 = std_info->l7 + bt->il_vsync +
983                                 bt->il_vbackporch + 1;
984                         std_info->l11 = std_info->vsize -
985                                 (bt->il_vfrontporch - 1);
986                 } else {
987                         vpif_dbg(2, debug, "Required timing values for "
988                                         "interlaced BT format missing\n");
989                         return -EINVAL;
990                 }
991         } else {
992                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
993         }
994         strncpy(std_info->name, "Custom timings BT656/1120",
995                         VPIF_MAX_NAME);
996         std_info->width = bt->width;
997         std_info->height = bt->height;
998         std_info->frm_fmt = bt->interlaced ? 0 : 1;
999         std_info->ycmux_mode = 0;
1000         std_info->capture_format = 0;
1001         std_info->vbi_supported = 0;
1002         std_info->hd_sd = 1;
1003         std_info->stdid = 0;
1004         vid_ch->stdid = 0;
1005 
1006         return 0;
1007 }
1008 
1009 /**
1010  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1011  * @file: file ptr
1012  * @priv: file handle
1013  * @timings: digital video timings
1014  */
1015 static int vpif_g_dv_timings(struct file *file, void *priv,
1016                 struct v4l2_dv_timings *timings)
1017 {
1018         struct vpif_display_config *config = vpif_dev->platform_data;
1019         struct video_device *vdev = video_devdata(file);
1020         struct channel_obj *ch = video_get_drvdata(vdev);
1021         struct vpif_display_chan_config *chan_cfg;
1022         struct video_obj *vid_ch = &ch->video;
1023         struct v4l2_output output;
1024 
1025         if (config->chan_config[ch->channel_id].outputs == NULL)
1026                 goto error;
1027 
1028         chan_cfg = &config->chan_config[ch->channel_id];
1029         output = chan_cfg->outputs[ch->output_idx].output;
1030 
1031         if (output.capabilities != V4L2_OUT_CAP_DV_TIMINGS)
1032                 goto error;
1033 
1034         *timings = vid_ch->dv_timings;
1035 
1036         return 0;
1037 error:
1038         return -ENODATA;
1039 }
1040 
1041 /*
1042  * vpif_log_status() - Status information
1043  * @file: file ptr
1044  * @priv: file handle
1045  *
1046  * Returns zero.
1047  */
1048 static int vpif_log_status(struct file *filep, void *priv)
1049 {
1050         /* status for sub devices */
1051         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1052 
1053         return 0;
1054 }
1055 
1056 /* vpif display ioctl operations */
1057 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1058         .vidioc_querycap                = vpif_querycap,
1059         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1060         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1061         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1062         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1063 
1064         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1065         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1066         .vidioc_querybuf                = vb2_ioctl_querybuf,
1067         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1068         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1069         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1070         .vidioc_streamon                = vb2_ioctl_streamon,
1071         .vidioc_streamoff               = vb2_ioctl_streamoff,
1072 
1073         .vidioc_s_std                   = vpif_s_std,
1074         .vidioc_g_std                   = vpif_g_std,
1075 
1076         .vidioc_enum_output             = vpif_enum_output,
1077         .vidioc_s_output                = vpif_s_output,
1078         .vidioc_g_output                = vpif_g_output,
1079 
1080         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1081         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1082         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1083 
1084         .vidioc_log_status              = vpif_log_status,
1085 };
1086 
1087 static const struct v4l2_file_operations vpif_fops = {
1088         .owner          = THIS_MODULE,
1089         .open           = v4l2_fh_open,
1090         .release        = vb2_fop_release,
1091         .unlocked_ioctl = video_ioctl2,
1092         .mmap           = vb2_fop_mmap,
1093         .poll           = vb2_fop_poll
1094 };
1095 
1096 /*Configure the channels, buffer sizei, request irq */
1097 static int initialize_vpif(void)
1098 {
1099         int free_channel_objects_index;
1100         int err, i, j;
1101 
1102         /* Allocate memory for six channel objects */
1103         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1104                 vpif_obj.dev[i] =
1105                     kzalloc(sizeof(struct channel_obj), GFP_KERNEL);
1106                 /* If memory allocation fails, return error */
1107                 if (!vpif_obj.dev[i]) {
1108                         free_channel_objects_index = i;
1109                         err = -ENOMEM;
1110                         goto vpif_init_free_channel_objects;
1111                 }
1112         }
1113 
1114         return 0;
1115 
1116 vpif_init_free_channel_objects:
1117         for (j = 0; j < free_channel_objects_index; j++)
1118                 kfree(vpif_obj.dev[j]);
1119         return err;
1120 }
1121 
1122 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1123                             struct v4l2_subdev *subdev,
1124                             struct v4l2_async_subdev *asd)
1125 {
1126         int i;
1127 
1128         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1129                 if (!strcmp(vpif_obj.config->subdevinfo[i].name,
1130                             subdev->name)) {
1131                         vpif_obj.sd[i] = subdev;
1132                         vpif_obj.sd[i]->grp_id = 1 << i;
1133                         return 0;
1134                 }
1135 
1136         return -EINVAL;
1137 }
1138 
1139 static int vpif_probe_complete(void)
1140 {
1141         struct common_obj *common;
1142         struct video_device *vdev;
1143         struct channel_obj *ch;
1144         struct vb2_queue *q;
1145         int j, err, k;
1146 
1147         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1148                 ch = vpif_obj.dev[j];
1149                 /* Initialize field of the channel objects */
1150                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1151                         common = &ch->common[k];
1152                         spin_lock_init(&common->irqlock);
1153                         mutex_init(&common->lock);
1154                         common->set_addr = NULL;
1155                         common->ytop_off = 0;
1156                         common->ybtm_off = 0;
1157                         common->ctop_off = 0;
1158                         common->cbtm_off = 0;
1159                         common->cur_frm = NULL;
1160                         common->next_frm = NULL;
1161                         memset(&common->fmt, 0, sizeof(common->fmt));
1162                 }
1163                 ch->initialized = 0;
1164                 if (vpif_obj.config->subdev_count)
1165                         ch->sd = vpif_obj.sd[0];
1166                 ch->channel_id = j;
1167 
1168                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1169 
1170                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1171                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1172 
1173                 /* select output 0 */
1174                 err = vpif_set_output(vpif_obj.config, ch, 0);
1175                 if (err)
1176                         goto probe_out;
1177 
1178                 /* set initial format */
1179                 ch->video.stdid = V4L2_STD_525_60;
1180                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1181                 vpif_update_resolution(ch);
1182 
1183                 /* Initialize vb2 queue */
1184                 q = &common->buffer_queue;
1185                 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1186                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1187                 q->drv_priv = ch;
1188                 q->ops = &video_qops;
1189                 q->mem_ops = &vb2_dma_contig_memops;
1190                 q->buf_struct_size = sizeof(struct vpif_disp_buffer);
1191                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1192                 q->min_buffers_needed = 1;
1193                 q->lock = &common->lock;
1194                 err = vb2_queue_init(q);
1195                 if (err) {
1196                         vpif_err("vpif_display: vb2_queue_init() failed\n");
1197                         goto probe_out;
1198                 }
1199 
1200                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1201                 if (IS_ERR(common->alloc_ctx)) {
1202                         vpif_err("Failed to get the context\n");
1203                         err = PTR_ERR(common->alloc_ctx);
1204                         goto probe_out;
1205                 }
1206 
1207                 INIT_LIST_HEAD(&common->dma_queue);
1208 
1209                 /* register video device */
1210                 vpif_dbg(1, debug, "channel=%p,channel->video_dev=%p\n",
1211                          ch, &ch->video_dev);
1212 
1213                 /* Initialize the video_device structure */
1214                 vdev = &ch->video_dev;
1215                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1216                 vdev->release = video_device_release_empty;
1217                 vdev->fops = &vpif_fops;
1218                 vdev->ioctl_ops = &vpif_ioctl_ops;
1219                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1220                 vdev->vfl_dir = VFL_DIR_TX;
1221                 vdev->queue = q;
1222                 vdev->lock = &common->lock;
1223                 video_set_drvdata(&ch->video_dev, ch);
1224                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1225                                             (j ? 3 : 2));
1226                 if (err < 0)
1227                         goto probe_out;
1228         }
1229 
1230         return 0;
1231 
1232 probe_out:
1233         for (k = 0; k < j; k++) {
1234                 ch = vpif_obj.dev[k];
1235                 common = &ch->common[k];
1236                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1237                 video_unregister_device(&ch->video_dev);
1238         }
1239         return err;
1240 }
1241 
1242 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1243 {
1244         return vpif_probe_complete();
1245 }
1246 
1247 /*
1248  * vpif_probe: This function creates device entries by register itself to the
1249  * V4L2 driver and initializes fields of each channel objects
1250  */
1251 static __init int vpif_probe(struct platform_device *pdev)
1252 {
1253         struct vpif_subdev_info *subdevdata;
1254         struct i2c_adapter *i2c_adap;
1255         struct resource *res;
1256         int subdev_count;
1257         int res_idx = 0;
1258         int i, err;
1259 
1260         vpif_dev = &pdev->dev;
1261         err = initialize_vpif();
1262 
1263         if (err) {
1264                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1265                 return err;
1266         }
1267 
1268         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1269         if (err) {
1270                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1271                 return err;
1272         }
1273 
1274         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1275                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1276                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1277                                         (void *)(&vpif_obj.dev[res_idx]->
1278                                         channel_id));
1279                 if (err) {
1280                         err = -EINVAL;
1281                         vpif_err("VPIF IRQ request failed\n");
1282                         goto vpif_unregister;
1283                 }
1284                 res_idx++;
1285         }
1286 
1287         vpif_obj.config = pdev->dev.platform_data;
1288         subdev_count = vpif_obj.config->subdev_count;
1289         subdevdata = vpif_obj.config->subdevinfo;
1290         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1291                                                                 GFP_KERNEL);
1292         if (vpif_obj.sd == NULL) {
1293                 vpif_err("unable to allocate memory for subdevice pointers\n");
1294                 err = -ENOMEM;
1295                 goto vpif_unregister;
1296         }
1297 
1298         if (!vpif_obj.config->asd_sizes) {
1299                 i2c_adap = i2c_get_adapter(1);
1300                 for (i = 0; i < subdev_count; i++) {
1301                         vpif_obj.sd[i] =
1302                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1303                                                           i2c_adap,
1304                                                           &subdevdata[i].
1305                                                           board_info,
1306                                                           NULL);
1307                         if (!vpif_obj.sd[i]) {
1308                                 vpif_err("Error registering v4l2 subdevice\n");
1309                                 err = -ENODEV;
1310                                 goto probe_subdev_out;
1311                         }
1312 
1313                         if (vpif_obj.sd[i])
1314                                 vpif_obj.sd[i]->grp_id = 1 << i;
1315                 }
1316                 vpif_probe_complete();
1317         } else {
1318                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1319                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1320                 vpif_obj.notifier.bound = vpif_async_bound;
1321                 vpif_obj.notifier.complete = vpif_async_complete;
1322                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1323                                                    &vpif_obj.notifier);
1324                 if (err) {
1325                         vpif_err("Error registering async notifier\n");
1326                         err = -EINVAL;
1327                         goto probe_subdev_out;
1328                 }
1329         }
1330 
1331         return 0;
1332 
1333 probe_subdev_out:
1334         kfree(vpif_obj.sd);
1335 vpif_unregister:
1336         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1337 
1338         return err;
1339 }
1340 
1341 /*
1342  * vpif_remove: It un-register channels from V4L2 driver
1343  */
1344 static int vpif_remove(struct platform_device *device)
1345 {
1346         struct common_obj *common;
1347         struct channel_obj *ch;
1348         int i;
1349 
1350         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1351 
1352         kfree(vpif_obj.sd);
1353         /* un-register device */
1354         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1355                 /* Get the pointer to the channel object */
1356                 ch = vpif_obj.dev[i];
1357                 common = &ch->common[VPIF_VIDEO_INDEX];
1358                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1359                 /* Unregister video device */
1360                 video_unregister_device(&ch->video_dev);
1361                 kfree(vpif_obj.dev[i]);
1362         }
1363 
1364         return 0;
1365 }
1366 
1367 #ifdef CONFIG_PM_SLEEP
1368 static int vpif_suspend(struct device *dev)
1369 {
1370         struct common_obj *common;
1371         struct channel_obj *ch;
1372         int i;
1373 
1374         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1375                 /* Get the pointer to the channel object */
1376                 ch = vpif_obj.dev[i];
1377                 common = &ch->common[VPIF_VIDEO_INDEX];
1378 
1379                 if (!vb2_start_streaming_called(&common->buffer_queue))
1380                         continue;
1381 
1382                 mutex_lock(&common->lock);
1383                 /* Disable channel */
1384                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1385                         enable_channel2(0);
1386                         channel2_intr_enable(0);
1387                 }
1388                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1389                         ycmux_mode == 2) {
1390                         enable_channel3(0);
1391                         channel3_intr_enable(0);
1392                 }
1393                 mutex_unlock(&common->lock);
1394         }
1395 
1396         return 0;
1397 }
1398 
1399 static int vpif_resume(struct device *dev)
1400 {
1401 
1402         struct common_obj *common;
1403         struct channel_obj *ch;
1404         int i;
1405 
1406         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1407                 /* Get the pointer to the channel object */
1408                 ch = vpif_obj.dev[i];
1409                 common = &ch->common[VPIF_VIDEO_INDEX];
1410 
1411                 if (!vb2_start_streaming_called(&common->buffer_queue))
1412                         continue;
1413 
1414                 mutex_lock(&common->lock);
1415                 /* Enable channel */
1416                 if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
1417                         enable_channel2(1);
1418                         channel2_intr_enable(1);
1419                 }
1420                 if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
1421                                 ycmux_mode == 2) {
1422                         enable_channel3(1);
1423                         channel3_intr_enable(1);
1424                 }
1425                 mutex_unlock(&common->lock);
1426         }
1427 
1428         return 0;
1429 }
1430 
1431 #endif
1432 
1433 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1434 
1435 static __refdata struct platform_driver vpif_driver = {
1436         .driver = {
1437                         .name   = VPIF_DRIVER_NAME,
1438                         .pm     = &vpif_pm_ops,
1439         },
1440         .probe  = vpif_probe,
1441         .remove = vpif_remove,
1442 };
1443 
1444 module_platform_driver(vpif_driver);
1445 

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