drivers/media/platform/qcom/camss-8x16/camss-video.c

   1 /*
   2  * camss-video.c
   3  *
   4  * Qualcomm MSM Camera Subsystem - V4L2 device node
   5  *
   6  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
   7  * Copyright (C) 2015-2017 Linaro Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 and
  11  * only version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18 #include <linux/slab.h>
  19 #include <media/media-entity.h>
  20 #include <media/v4l2-dev.h>
  21 #include <media/v4l2-device.h>
  22 #include <media/v4l2-ioctl.h>
  23 #include <media/v4l2-mc.h>
  24 #include <media/videobuf2-dma-sg.h>
  25
  26 #include "camss-video.h"
  27 #include "camss.h"
  28
  29 struct fract {
  30         u8 numerator;
  31         u8 denominator;
  32 };
  33
  34 /*
  35  * struct camss_format_info - ISP media bus format information
  36  * @code: V4L2 media bus format code
  37  * @pixelformat: V4L2 pixel format FCC identifier
  38  * @planes: Number of planes
  39  * @hsub: Horizontal subsampling (for each plane)
  40  * @vsub: Vertical subsampling (for each plane)
  41  * @bpp: Bits per pixel when stored in memory (for each plane)
  42  */
  43 struct camss_format_info {
  44         u32 code;
  45         u32 pixelformat;
  46         u8 planes;
  47         struct fract hsub[3];
  48         struct fract vsub[3];
  49         unsigned int bpp[3];
  50 };
  51
  52 static const struct camss_format_info formats_rdi[] = {
  53         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
  54           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  55         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
  56           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  57         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
  58           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  59         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
  60           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  61         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
  62           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  63         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
  64           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  65         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
  66           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  67         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
  68           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  69         { MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
  70           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  71         { MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
  72           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  73         { MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
  74           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  75         { MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
  76           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  77         { MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
  78           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  79         { MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
  80           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  81         { MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
  82           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  83         { MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
  84           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  85 };
  86
  87 static const struct camss_format_info formats_pix[] = {
  88         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
  89           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
  90         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
  91           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
  92         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
  93           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
  94         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
  95           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
  96         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
  97           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
  98         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
  99           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 100         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 101           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 102         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 103           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 104         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
 105           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 106         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
 107           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 108         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
 109           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 110         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
 111           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 112         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
 113           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 114         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
 115           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 116         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
 117           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 118         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
 119           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 120 };
 121
 122 /* -----------------------------------------------------------------------------
 123  * Helper functions
 124  */
 125
 126 static int video_find_format(u32 code, u32 pixelformat,
 127                              const struct camss_format_info *formats,
 128                              unsigned int nformats)
 129 {
 130         int i;
 131
 132         for (i = 0; i < nformats; i++) {
 133                 if (formats[i].code == code &&
 134                     formats[i].pixelformat == pixelformat)
 135                         return i;
 136         }
 137
 138         for (i = 0; i < nformats; i++)
 139                 if (formats[i].code == code)
 140                         return i;
 141
 142         WARN_ON(1);
 143
 144         return -EINVAL;
 145 }
 146
 147 /*
 148  * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
 149  * @mbus: v4l2_mbus_framefmt format (input)
 150  * @pix: v4l2_pix_format_mplane format (output)
 151  * @f: a pointer to formats array element to be used for the conversion
 152  * @alignment: bytesperline alignment value
 153  *
 154  * Fill the output pix structure with information from the input mbus format.
 155  *
 156  * Return 0 on success or a negative error code otherwise
 157  */
 158 static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus,
 159                                 struct v4l2_pix_format_mplane *pix,
 160                                 const struct camss_format_info *f,
 161                                 unsigned int alignment)
 162 {
 163         unsigned int i;
 164         u32 bytesperline;
 165
 166         memset(pix, 0, sizeof(*pix));
 167         v4l2_fill_pix_format_mplane(pix, mbus);
 168         pix->pixelformat = f->pixelformat;
 169         pix->num_planes = f->planes;
 170         for (i = 0; i < pix->num_planes; i++) {
 171                 bytesperline = pix->width / f->hsub[i].numerator *
 172                         f->hsub[i].denominator * f->bpp[i] / 8;
 173                 bytesperline = ALIGN(bytesperline, alignment);
 174                 pix->plane_fmt[i].bytesperline = bytesperline;
 175                 pix->plane_fmt[i].sizeimage = pix->height /
 176                                 f->vsub[i].numerator * f->vsub[i].denominator *
 177                                 bytesperline;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static struct v4l2_subdev *video_remote_subdev(struct camss_video *video,
 184                                                u32 *pad)
 185 {
 186         struct media_pad *remote;
 187
 188         remote = media_entity_remote_pad(&video->pad);
 189
 190         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 191                 return NULL;
 192
 193         if (pad)
 194                 *pad = remote->index;
 195
 196         return media_entity_to_v4l2_subdev(remote->entity);
 197 }
 198
 199 static int video_get_subdev_format(struct camss_video *video,
 200                                    struct v4l2_format *format)
 201 {
 202         struct v4l2_subdev_format fmt;
 203         struct v4l2_subdev *subdev;
 204         u32 pad;
 205         int ret;
 206
 207         subdev = video_remote_subdev(video, &pad);
 208         if (subdev == NULL)
 209                 return -EPIPE;
 210
 211         fmt.pad = pad;
 212         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 213
 214         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 215         if (ret)
 216                 return ret;
 217
 218         ret = video_find_format(fmt.format.code,
 219                                 format->fmt.pix_mp.pixelformat,
 220                                 video->formats, video->nformats);
 221         if (ret < 0)
 222                 return ret;
 223
 224         format->type = video->type;
 225
 226         return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp,
 227                                     &video->formats[ret], video->bpl_alignment);
 228 }
 229
 230 /* -----------------------------------------------------------------------------
 231  * Video queue operations
 232  */
 233
 234 static int video_queue_setup(struct vb2_queue *q,
 235         unsigned int *num_buffers, unsigned int *num_planes,
 236         unsigned int sizes[], struct device *alloc_devs[])
 237 {
 238         struct camss_video *video = vb2_get_drv_priv(q);
 239         const struct v4l2_pix_format_mplane *format =
 240                                                 &video->active_fmt.fmt.pix_mp;
 241         unsigned int i;
 242
 243         if (*num_planes) {
 244                 if (*num_planes != format->num_planes)
 245                         return -EINVAL;
 246
 247                 for (i = 0; i < *num_planes; i++)
 248                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 249                                 return -EINVAL;
 250
 251                 return 0;
 252         }
 253
 254         *num_planes = format->num_planes;
 255
 256         for (i = 0; i < *num_planes; i++)
 257                 sizes[i] = format->plane_fmt[i].sizeimage;
 258
 259         return 0;
 260 }
 261
 262 static int video_buf_init(struct vb2_buffer *vb)
 263 {
 264         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 265         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 266         struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
 267                                                    vb);
 268         const struct v4l2_pix_format_mplane *format =
 269                                                 &video->active_fmt.fmt.pix_mp;
 270         struct sg_table *sgt;
 271         unsigned int i;
 272
 273         for (i = 0; i < format->num_planes; i++) {
 274                 sgt = vb2_dma_sg_plane_desc(vb, i);
 275                 if (!sgt)
 276                         return -EFAULT;
 277
 278                 buffer->addr[i] = sg_dma_address(sgt->sgl);
 279         }
 280
 281         if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
 282                         format->pixelformat == V4L2_PIX_FMT_NV21 ||
 283                         format->pixelformat == V4L2_PIX_FMT_NV16 ||
 284                         format->pixelformat == V4L2_PIX_FMT_NV61)
 285                 buffer->addr[1] = buffer->addr[0] +
 286                                 format->plane_fmt[0].bytesperline *
 287                                 format->height;
 288
 289         return 0;
 290 }
 291
 292 static int video_buf_prepare(struct vb2_buffer *vb)
 293 {
 294         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 295         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 296         const struct v4l2_pix_format_mplane *format =
 297                                                 &video->active_fmt.fmt.pix_mp;
 298         unsigned int i;
 299
 300         for (i = 0; i < format->num_planes; i++) {
 301                 if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i))
 302                         return -EINVAL;
 303
 304                 vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage);
 305         }
 306
 307         vbuf->field = V4L2_FIELD_NONE;
 308
 309         return 0;
 310 }
 311
 312 static void video_buf_queue(struct vb2_buffer *vb)
 313 {
 314         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 315         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 316         struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
 317                                                    vb);
 318
 319         video->ops->queue_buffer(video, buffer);
 320 }
 321
 322 static int video_check_format(struct camss_video *video)
 323 {
 324         struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp;
 325         struct v4l2_format format;
 326         struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp;
 327         int ret;
 328
 329         sd_pix->pixelformat = pix->pixelformat;
 330         ret = video_get_subdev_format(video, &format);
 331         if (ret < 0)
 332                 return ret;
 333
 334         if (pix->pixelformat != sd_pix->pixelformat ||
 335             pix->height != sd_pix->height ||
 336             pix->width != sd_pix->width ||
 337             pix->num_planes != sd_pix->num_planes ||
 338             pix->field != format.fmt.pix_mp.field)
 339                 return -EPIPE;
 340
 341         return 0;
 342 }
 343
 344 static int video_start_streaming(struct vb2_queue *q, unsigned int count)
 345 {
 346         struct camss_video *video = vb2_get_drv_priv(q);
 347         struct video_device *vdev = &video->vdev;
 348         struct media_entity *entity;
 349         struct media_pad *pad;
 350         struct v4l2_subdev *subdev;
 351         int ret;
 352
 353         ret = media_pipeline_start(&vdev->entity, &video->pipe);
 354         if (ret < 0)
 355                 return ret;
 356
 357         ret = video_check_format(video);
 358         if (ret < 0)
 359                 goto error;
 360
 361         entity = &vdev->entity;
 362         while (1) {
 363                 pad = &entity->pads[0];
 364                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 365                         break;
 366
 367                 pad = media_entity_remote_pad(pad);
 368                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 369                         break;
 370
 371                 entity = pad->entity;
 372                 subdev = media_entity_to_v4l2_subdev(entity);
 373
 374                 ret = v4l2_subdev_call(subdev, video, s_stream, 1);
 375                 if (ret < 0 && ret != -ENOIOCTLCMD)
 376                         goto error;
 377         }
 378
 379         return 0;
 380
 381 error:
 382         media_pipeline_stop(&vdev->entity);
 383
 384         video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
 385
 386         return ret;
 387 }
 388
 389 static void video_stop_streaming(struct vb2_queue *q)
 390 {
 391         struct camss_video *video = vb2_get_drv_priv(q);
 392         struct video_device *vdev = &video->vdev;
 393         struct media_entity *entity;
 394         struct media_pad *pad;
 395         struct v4l2_subdev *subdev;
 396
 397         entity = &vdev->entity;
 398         while (1) {
 399                 pad = &entity->pads[0];
 400                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 401                         break;
 402
 403                 pad = media_entity_remote_pad(pad);
 404                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 405                         break;
 406
 407                 entity = pad->entity;
 408                 subdev = media_entity_to_v4l2_subdev(entity);
 409
 410                 v4l2_subdev_call(subdev, video, s_stream, 0);
 411         }
 412
 413         media_pipeline_stop(&vdev->entity);
 414
 415         video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
 416 }
 417
 418 static const struct vb2_ops msm_video_vb2_q_ops = {
 419         .queue_setup     = video_queue_setup,
 420         .wait_prepare    = vb2_ops_wait_prepare,
 421         .wait_finish     = vb2_ops_wait_finish,
 422         .buf_init        = video_buf_init,
 423         .buf_prepare     = video_buf_prepare,
 424         .buf_queue       = video_buf_queue,
 425         .start_streaming = video_start_streaming,
 426         .stop_streaming  = video_stop_streaming,
 427 };
 428
 429 /* -----------------------------------------------------------------------------
 430  * V4L2 ioctls
 431  */
 432
 433 static int video_querycap(struct file *file, void *fh,
 434                           struct v4l2_capability *cap)
 435 {
 436         struct camss_video *video = video_drvdata(file);
 437
 438         strlcpy(cap->driver, "qcom-camss", sizeof(cap->driver));
 439         strlcpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
 440         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 441                  dev_name(video->camss->dev));
 442
 443         return 0;
 444 }
 445
 446 static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 447 {
 448         struct camss_video *video = video_drvdata(file);
 449         int i, j, k;
 450
 451         if (f->type != video->type)
 452                 return -EINVAL;
 453
 454         if (f->index >= video->nformats)
 455                 return -EINVAL;
 456
 457         /* find index "i" of "k"th unique pixelformat in formats array */
 458         k = -1;
 459         for (i = 0; i < video->nformats; i++) {
 460                 for (j = 0; j < i; j++) {
 461                         if (video->formats[i].pixelformat ==
 462                                         video->formats[j].pixelformat)
 463                                 break;
 464                 }
 465
 466                 if (j == i)
 467                         k++;
 468
 469                 if (k == f->index)
 470                         break;
 471         }
 472
 473         if (k < f->index)
 474                 return -EINVAL;
 475
 476         f->pixelformat = video->formats[i].pixelformat;
 477
 478         return 0;
 479 }
 480
 481 static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
 482 {
 483         struct camss_video *video = video_drvdata(file);
 484
 485         *f = video->active_fmt;
 486
 487         return 0;
 488 }
 489
 490 static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f)
 491 {
 492         struct v4l2_pix_format_mplane *pix_mp;
 493         const struct camss_format_info *fi;
 494         struct v4l2_plane_pix_format *p;
 495         u32 bytesperline[3] = { 0 };
 496         u32 sizeimage[3] = { 0 };
 497         u32 width, height;
 498         u32 bpl, lines;
 499         int i, j;
 500
 501         pix_mp = &f->fmt.pix_mp;
 502
 503         if (video->line_based)
 504                 for (i = 0; i < pix_mp->num_planes && i < 3; i++) {
 505                         p = &pix_mp->plane_fmt[i];
 506                         bytesperline[i] = clamp_t(u32, p->bytesperline,
 507                                                   1, 65528);
 508                         sizeimage[i] = clamp_t(u32, p->sizeimage,
 509                                                bytesperline[i],
 510                                                bytesperline[i] * 4096);
 511                 }
 512
 513         for (j = 0; j < video->nformats; j++)
 514                 if (pix_mp->pixelformat == video->formats[j].pixelformat)
 515                         break;
 516
 517         if (j == video->nformats)
 518                 j = 0; /* default format */
 519
 520         fi = &video->formats[j];
 521         width = pix_mp->width;
 522         height = pix_mp->height;
 523
 524         memset(pix_mp, 0, sizeof(*pix_mp));
 525
 526         pix_mp->pixelformat = fi->pixelformat;
 527         pix_mp->width = clamp_t(u32, width, 1, 8191);
 528         pix_mp->height = clamp_t(u32, height, 1, 8191);
 529         pix_mp->num_planes = fi->planes;
 530         for (i = 0; i < pix_mp->num_planes; i++) {
 531                 bpl = pix_mp->width / fi->hsub[i].numerator *
 532                         fi->hsub[i].denominator * fi->bpp[i] / 8;
 533                 bpl = ALIGN(bpl, video->bpl_alignment);
 534                 pix_mp->plane_fmt[i].bytesperline = bpl;
 535                 pix_mp->plane_fmt[i].sizeimage = pix_mp->height /
 536                         fi->vsub[i].numerator * fi->vsub[i].denominator * bpl;
 537         }
 538
 539         pix_mp->field = V4L2_FIELD_NONE;
 540         pix_mp->colorspace = V4L2_COLORSPACE_SRGB;
 541         pix_mp->flags = 0;
 542         pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace);
 543         pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 544                                         pix_mp->colorspace, pix_mp->ycbcr_enc);
 545         pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace);
 546
 547         if (video->line_based)
 548                 for (i = 0; i < pix_mp->num_planes; i++) {
 549                         p = &pix_mp->plane_fmt[i];
 550                         p->bytesperline = clamp_t(u32, p->bytesperline,
 551                                                   1, 65528);
 552                         p->sizeimage = clamp_t(u32, p->sizeimage,
 553                                                p->bytesperline,
 554                                                p->bytesperline * 4096);
 555                         lines = p->sizeimage / p->bytesperline;
 556
 557                         if (p->bytesperline < bytesperline[i])
 558                                 p->bytesperline = ALIGN(bytesperline[i], 8);
 559
 560                         if (p->sizeimage < p->bytesperline * lines)
 561                                 p->sizeimage = p->bytesperline * lines;
 562
 563                         if (p->sizeimage < sizeimage[i])
 564                                 p->sizeimage = sizeimage[i];
 565                 }
 566
 567         return 0;
 568 }
 569
 570 static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
 571 {
 572         struct camss_video *video = video_drvdata(file);
 573
 574         return __video_try_fmt(video, f);
 575 }
 576
 577 static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 578 {
 579         struct camss_video *video = video_drvdata(file);
 580         int ret;
 581
 582         if (vb2_is_busy(&video->vb2_q))
 583                 return -EBUSY;
 584
 585         ret = __video_try_fmt(video, f);
 586         if (ret < 0)
 587                 return ret;
 588
 589         video->active_fmt = *f;
 590
 591         return 0;
 592 }
 593
 594 static int video_enum_input(struct file *file, void *fh,
 595                             struct v4l2_input *input)
 596 {
 597         if (input->index > 0)
 598                 return -EINVAL;
 599
 600         strlcpy(input->name, "camera", sizeof(input->name));
 601         input->type = V4L2_INPUT_TYPE_CAMERA;
 602
 603         return 0;
 604 }
 605
 606 static int video_g_input(struct file *file, void *fh, unsigned int *input)
 607 {
 608         *input = 0;
 609
 610         return 0;
 611 }
 612
 613 static int video_s_input(struct file *file, void *fh, unsigned int input)
 614 {
 615         return input == 0 ? 0 : -EINVAL;
 616 }
 617
 618 static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = {
 619         .vidioc_querycap                = video_querycap,
 620         .vidioc_enum_fmt_vid_cap_mplane = video_enum_fmt,
 621         .vidioc_g_fmt_vid_cap_mplane    = video_g_fmt,
 622         .vidioc_s_fmt_vid_cap_mplane    = video_s_fmt,
 623         .vidioc_try_fmt_vid_cap_mplane  = video_try_fmt,
 624         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 625         .vidioc_querybuf                = vb2_ioctl_querybuf,
 626         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 627         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 628         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 629         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 630         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 631         .vidioc_streamon                = vb2_ioctl_streamon,
 632         .vidioc_streamoff               = vb2_ioctl_streamoff,
 633         .vidioc_enum_input              = video_enum_input,
 634         .vidioc_g_input                 = video_g_input,
 635         .vidioc_s_input                 = video_s_input,
 636 };
 637
 638 /* -----------------------------------------------------------------------------
 639  * V4L2 file operations
 640  */
 641
 642 static int video_open(struct file *file)
 643 {
 644         struct video_device *vdev = video_devdata(file);
 645         struct camss_video *video = video_drvdata(file);
 646         struct v4l2_fh *vfh;
 647         int ret;
 648
 649         mutex_lock(&video->lock);
 650
 651         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 652         if (vfh == NULL) {
 653                 ret = -ENOMEM;
 654                 goto error_alloc;
 655         }
 656
 657         v4l2_fh_init(vfh, vdev);
 658         v4l2_fh_add(vfh);
 659
 660         file->private_data = vfh;
 661
 662         ret = v4l2_pipeline_pm_use(&vdev->entity, 1);
 663         if (ret < 0) {
 664                 dev_err(video->camss->dev, "Failed to power up pipeline: %d\n",
 665                         ret);
 666                 goto error_pm_use;
 667         }
 668
 669         mutex_unlock(&video->lock);
 670
 671         return 0;
 672
 673 error_pm_use:
 674         v4l2_fh_release(file);
 675
 676 error_alloc:
 677         mutex_unlock(&video->lock);
 678
 679         return ret;
 680 }
 681
 682 static int video_release(struct file *file)
 683 {
 684         struct video_device *vdev = video_devdata(file);
 685
 686         vb2_fop_release(file);
 687
 688         v4l2_pipeline_pm_use(&vdev->entity, 0);
 689
 690         file->private_data = NULL;
 691
 692         return 0;
 693 }
 694
 695 static const struct v4l2_file_operations msm_vid_fops = {
 696         .owner          = THIS_MODULE,
 697         .unlocked_ioctl = video_ioctl2,
 698         .open           = video_open,
 699         .release        = video_release,
 700         .poll           = vb2_fop_poll,
 701         .mmap           = vb2_fop_mmap,
 702         .read           = vb2_fop_read,
 703 };
 704
 705 /* -----------------------------------------------------------------------------
 706  * CAMSS video core
 707  */
 708
 709 static void msm_video_release(struct video_device *vdev)
 710 {
 711         struct camss_video *video = video_get_drvdata(vdev);
 712
 713         media_entity_cleanup(&vdev->entity);
 714
 715         mutex_destroy(&video->q_lock);
 716         mutex_destroy(&video->lock);
 717
 718         if (atomic_dec_and_test(&video->camss->ref_count))
 719                 camss_delete(video->camss);
 720 }
 721
 722 /*
 723  * msm_video_init_format - Helper function to initialize format
 724  * @video: struct camss_video
 725  *
 726  * Initialize pad format with default value.
 727  *
 728  * Return 0 on success or a negative error code otherwise
 729  */
 730 static int msm_video_init_format(struct camss_video *video)
 731 {
 732         int ret;
 733         struct v4l2_format format = {
 734                 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
 735                 .fmt.pix_mp = {
 736                         .width = 1920,
 737                         .height = 1080,
 738                         .pixelformat = video->formats[0].pixelformat,
 739                 },
 740         };
 741
 742         ret = __video_try_fmt(video, &format);
 743         if (ret < 0)
 744                 return ret;
 745
 746         video->active_fmt = format;
 747
 748         return 0;
 749 }
 750
 751 /*
 752  * msm_video_register - Register a video device node
 753  * @video: struct camss_video
 754  * @v4l2_dev: V4L2 device
 755  * @name: name to be used for the video device node
 756  *
 757  * Initialize and register a video device node to a V4L2 device. Also
 758  * initialize the vb2 queue.
 759  *
 760  * Return 0 on success or a negative error code otherwise
 761  */
 762
 763 int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev,
 764                        const char *name, int is_pix)
 765 {
 766         struct media_pad *pad = &video->pad;
 767         struct video_device *vdev;
 768         struct vb2_queue *q;
 769         int ret;
 770
 771         vdev = &video->vdev;
 772
 773         mutex_init(&video->q_lock);
 774
 775         q = &video->vb2_q;
 776         q->drv_priv = video;
 777         q->mem_ops = &vb2_dma_sg_memops;
 778         q->ops = &msm_video_vb2_q_ops;
 779         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 780         q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ;
 781         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 782         q->buf_struct_size = sizeof(struct camss_buffer);
 783         q->dev = video->camss->dev;
 784         q->lock = &video->q_lock;
 785         ret = vb2_queue_init(q);
 786         if (ret < 0) {
 787                 dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret);
 788                 goto error_vb2_init;
 789         }
 790
 791         pad->flags = MEDIA_PAD_FL_SINK;
 792         ret = media_entity_pads_init(&vdev->entity, 1, pad);
 793         if (ret < 0) {
 794                 dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n",
 795                         ret);
 796                 goto error_media_init;
 797         }
 798
 799         mutex_init(&video->lock);
 800
 801         video->formats = formats_rdi;
 802         video->nformats = ARRAY_SIZE(formats_rdi);
 803         if (is_pix) {
 804                 video->formats = formats_pix;
 805                 video->nformats = ARRAY_SIZE(formats_pix);
 806         }
 807
 808         ret = msm_video_init_format(video);
 809         if (ret < 0) {
 810                 dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret);
 811                 goto error_video_register;
 812         }
 813
 814         vdev->fops = &msm_vid_fops;
 815         vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING |
 816                                                         V4L2_CAP_READWRITE;
 817         vdev->ioctl_ops = &msm_vid_ioctl_ops;
 818         vdev->release = msm_video_release;
 819         vdev->v4l2_dev = v4l2_dev;
 820         vdev->vfl_dir = VFL_DIR_RX;
 821         vdev->queue = &video->vb2_q;
 822         vdev->lock = &video->lock;
 823         strlcpy(vdev->name, name, sizeof(vdev->name));
 824
 825         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
 826         if (ret < 0) {
 827                 dev_err(v4l2_dev->dev, "Failed to register video device: %d\n",
 828                         ret);
 829                 goto error_video_register;
 830         }
 831
 832         video_set_drvdata(vdev, video);
 833         atomic_inc(&video->camss->ref_count);
 834
 835         return 0;
 836
 837 error_video_register:
 838         media_entity_cleanup(&vdev->entity);
 839         mutex_destroy(&video->lock);
 840 error_media_init:
 841         vb2_queue_release(&video->vb2_q);
 842 error_vb2_init:
 843         mutex_destroy(&video->q_lock);
 844
 845         return ret;
 846 }
 847
 848 void msm_video_stop_streaming(struct camss_video *video)
 849 {
 850         if (vb2_is_streaming(&video->vb2_q))
 851                 vb2_queue_release(&video->vb2_q);
 852 }
 853
 854 void msm_video_unregister(struct camss_video *video)
 855 {
 856         atomic_inc(&video->camss->ref_count);
 857         video_unregister_device(&video->vdev);
 858         atomic_dec(&video->camss->ref_count);
 859 }