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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * camss-video.c
   4  *
   5  * Qualcomm MSM Camera Subsystem - V4L2 device node
   6  *
   7  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
   8  * Copyright (C) 2015-2018 Linaro Ltd.
   9  */
  10 #include <linux/slab.h>
  11 #include <media/media-entity.h>
  12 #include <media/v4l2-dev.h>
  13 #include <media/v4l2-device.h>
  14 #include <media/v4l2-ioctl.h>
  15 #include <media/v4l2-mc.h>
  16 #include <media/videobuf2-dma-sg.h>
  17
  18 #include "camss-video.h"
  19 #include "camss.h"
  20
  21 struct fract {
  22         u8 numerator;
  23         u8 denominator;
  24 };
  25
  26 /*
  27  * struct camss_format_info - ISP media bus format information
  28  * @code: V4L2 media bus format code
  29  * @pixelformat: V4L2 pixel format FCC identifier
  30  * @planes: Number of planes
  31  * @hsub: Horizontal subsampling (for each plane)
  32  * @vsub: Vertical subsampling (for each plane)
  33  * @bpp: Bits per pixel when stored in memory (for each plane)
  34  */
  35 struct camss_format_info {
  36         u32 code;
  37         u32 pixelformat;
  38         u8 planes;
  39         struct fract hsub[3];
  40         struct fract vsub[3];
  41         unsigned int bpp[3];
  42 };
  43
  44 static const struct camss_format_info formats_rdi_8x16[] = {
  45         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
  46           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  47         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
  48           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  49         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
  50           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  51         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
  52           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  53         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
  54           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  55         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
  56           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  57         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
  58           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  59         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
  60           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  61         { MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
  62           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  63         { MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
  64           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  65         { MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
  66           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  67         { MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
  68           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  69         { MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
  70           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  71         { MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
  72           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  73         { MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
  74           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  75         { MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
  76           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
  77         { MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
  78           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
  79 };
  80
  81 static const struct camss_format_info formats_rdi_8x96[] = {
  82         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
  83           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  84         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
  85           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  86         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
  87           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  88         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
  89           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
  90         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
  91           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  92         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
  93           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  94         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
  95           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  96         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
  97           { { 1, 1 } }, { { 1, 1 } }, { 8 } },
  98         { MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
  99           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
 100         { MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
 101           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
 102         { MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
 103           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
 104         { MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
 105           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
 106         { MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_PIX_FMT_SBGGR10, 1,
 107           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 108         { MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
 109           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
 110         { MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
 111           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
 112         { MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
 113           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
 114         { MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
 115           { { 1, 1 } }, { { 1, 1 } }, { 12 } },
 116         { MEDIA_BUS_FMT_SBGGR14_1X14, V4L2_PIX_FMT_SBGGR14P, 1,
 117           { { 1, 1 } }, { { 1, 1 } }, { 14 } },
 118         { MEDIA_BUS_FMT_SGBRG14_1X14, V4L2_PIX_FMT_SGBRG14P, 1,
 119           { { 1, 1 } }, { { 1, 1 } }, { 14 } },
 120         { MEDIA_BUS_FMT_SGRBG14_1X14, V4L2_PIX_FMT_SGRBG14P, 1,
 121           { { 1, 1 } }, { { 1, 1 } }, { 14 } },
 122         { MEDIA_BUS_FMT_SRGGB14_1X14, V4L2_PIX_FMT_SRGGB14P, 1,
 123           { { 1, 1 } }, { { 1, 1 } }, { 14 } },
 124         { MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
 125           { { 1, 1 } }, { { 1, 1 } }, { 10 } },
 126         { MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1,
 127           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 128 };
 129
 130 static const struct camss_format_info formats_pix_8x16[] = {
 131         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 132           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 133         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 134           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 135         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 136           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 137         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 138           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 139         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 140           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 141         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 142           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 143         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 144           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 145         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 146           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 147         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
 148           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 149         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
 150           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 151         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
 152           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 153         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
 154           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 155         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
 156           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 157         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
 158           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 159         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
 160           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 161         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
 162           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 163 };
 164
 165 static const struct camss_format_info formats_pix_8x96[] = {
 166         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 167           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 168         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 169           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 170         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 171           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 172         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
 173           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 174         { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 175           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 176         { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 177           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 178         { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 179           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 180         { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
 181           { { 1, 1 } }, { { 2, 3 } }, { 8 } },
 182         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
 183           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 184         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
 185           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 186         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
 187           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 188         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
 189           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 190         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
 191           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 192         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
 193           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 194         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
 195           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 196         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
 197           { { 1, 1 } }, { { 1, 2 } }, { 8 } },
 198         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
 199           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 200         { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
 201           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 202         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
 203           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 204         { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
 205           { { 1, 1 } }, { { 1, 1 } }, { 16 } },
 206 };
 207
 208 /* -----------------------------------------------------------------------------
 209  * Helper functions
 210  */
 211
 212 static int video_find_format(u32 code, u32 pixelformat,
 213                              const struct camss_format_info *formats,
 214                              unsigned int nformats)
 215 {
 216         int i;
 217
 218         for (i = 0; i < nformats; i++) {
 219                 if (formats[i].code == code &&
 220                     formats[i].pixelformat == pixelformat)
 221                         return i;
 222         }
 223
 224         for (i = 0; i < nformats; i++)
 225                 if (formats[i].code == code)
 226                         return i;
 227
 228         WARN_ON(1);
 229
 230         return -EINVAL;
 231 }
 232
 233 /*
 234  * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
 235  * @mbus: v4l2_mbus_framefmt format (input)
 236  * @pix: v4l2_pix_format_mplane format (output)
 237  * @f: a pointer to formats array element to be used for the conversion
 238  * @alignment: bytesperline alignment value
 239  *
 240  * Fill the output pix structure with information from the input mbus format.
 241  *
 242  * Return 0 on success or a negative error code otherwise
 243  */
 244 static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus,
 245                                 struct v4l2_pix_format_mplane *pix,
 246                                 const struct camss_format_info *f,
 247                                 unsigned int alignment)
 248 {
 249         unsigned int i;
 250         u32 bytesperline;
 251
 252         memset(pix, 0, sizeof(*pix));
 253         v4l2_fill_pix_format_mplane(pix, mbus);
 254         pix->pixelformat = f->pixelformat;
 255         pix->num_planes = f->planes;
 256         for (i = 0; i < pix->num_planes; i++) {
 257                 bytesperline = pix->width / f->hsub[i].numerator *
 258                         f->hsub[i].denominator * f->bpp[i] / 8;
 259                 bytesperline = ALIGN(bytesperline, alignment);
 260                 pix->plane_fmt[i].bytesperline = bytesperline;
 261                 pix->plane_fmt[i].sizeimage = pix->height /
 262                                 f->vsub[i].numerator * f->vsub[i].denominator *
 263                                 bytesperline;
 264         }
 265
 266         return 0;
 267 }
 268
 269 static struct v4l2_subdev *video_remote_subdev(struct camss_video *video,
 270                                                u32 *pad)
 271 {
 272         struct media_pad *remote;
 273
 274         remote = media_entity_remote_pad(&video->pad);
 275
 276         if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
 277                 return NULL;
 278
 279         if (pad)
 280                 *pad = remote->index;
 281
 282         return media_entity_to_v4l2_subdev(remote->entity);
 283 }
 284
 285 static int video_get_subdev_format(struct camss_video *video,
 286                                    struct v4l2_format *format)
 287 {
 288         struct v4l2_subdev_format fmt;
 289         struct v4l2_subdev *subdev;
 290         u32 pad;
 291         int ret;
 292
 293         subdev = video_remote_subdev(video, &pad);
 294         if (subdev == NULL)
 295                 return -EPIPE;
 296
 297         fmt.pad = pad;
 298         fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 299
 300         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 301         if (ret)
 302                 return ret;
 303
 304         ret = video_find_format(fmt.format.code,
 305                                 format->fmt.pix_mp.pixelformat,
 306                                 video->formats, video->nformats);
 307         if (ret < 0)
 308                 return ret;
 309
 310         format->type = video->type;
 311
 312         return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp,
 313                                     &video->formats[ret], video->bpl_alignment);
 314 }
 315
 316 /* -----------------------------------------------------------------------------
 317  * Video queue operations
 318  */
 319
 320 static int video_queue_setup(struct vb2_queue *q,
 321         unsigned int *num_buffers, unsigned int *num_planes,
 322         unsigned int sizes[], struct device *alloc_devs[])
 323 {
 324         struct camss_video *video = vb2_get_drv_priv(q);
 325         const struct v4l2_pix_format_mplane *format =
 326                                                 &video->active_fmt.fmt.pix_mp;
 327         unsigned int i;
 328
 329         if (*num_planes) {
 330                 if (*num_planes != format->num_planes)
 331                         return -EINVAL;
 332
 333                 for (i = 0; i < *num_planes; i++)
 334                         if (sizes[i] < format->plane_fmt[i].sizeimage)
 335                                 return -EINVAL;
 336
 337                 return 0;
 338         }
 339
 340         *num_planes = format->num_planes;
 341
 342         for (i = 0; i < *num_planes; i++)
 343                 sizes[i] = format->plane_fmt[i].sizeimage;
 344
 345         return 0;
 346 }
 347
 348 static int video_buf_init(struct vb2_buffer *vb)
 349 {
 350         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 351         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 352         struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
 353                                                    vb);
 354         const struct v4l2_pix_format_mplane *format =
 355                                                 &video->active_fmt.fmt.pix_mp;
 356         struct sg_table *sgt;
 357         unsigned int i;
 358
 359         for (i = 0; i < format->num_planes; i++) {
 360                 sgt = vb2_dma_sg_plane_desc(vb, i);
 361                 if (!sgt)
 362                         return -EFAULT;
 363
 364                 buffer->addr[i] = sg_dma_address(sgt->sgl);
 365         }
 366
 367         if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
 368                         format->pixelformat == V4L2_PIX_FMT_NV21 ||
 369                         format->pixelformat == V4L2_PIX_FMT_NV16 ||
 370                         format->pixelformat == V4L2_PIX_FMT_NV61)
 371                 buffer->addr[1] = buffer->addr[0] +
 372                                 format->plane_fmt[0].bytesperline *
 373                                 format->height;
 374
 375         return 0;
 376 }
 377
 378 static int video_buf_prepare(struct vb2_buffer *vb)
 379 {
 380         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 381         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 382         const struct v4l2_pix_format_mplane *format =
 383                                                 &video->active_fmt.fmt.pix_mp;
 384         unsigned int i;
 385
 386         for (i = 0; i < format->num_planes; i++) {
 387                 if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i))
 388                         return -EINVAL;
 389
 390                 vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage);
 391         }
 392
 393         vbuf->field = V4L2_FIELD_NONE;
 394
 395         return 0;
 396 }
 397
 398 static void video_buf_queue(struct vb2_buffer *vb)
 399 {
 400         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 401         struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
 402         struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
 403                                                    vb);
 404
 405         video->ops->queue_buffer(video, buffer);
 406 }
 407
 408 static int video_check_format(struct camss_video *video)
 409 {
 410         struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp;
 411         struct v4l2_format format;
 412         struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp;
 413         int ret;
 414
 415         sd_pix->pixelformat = pix->pixelformat;
 416         ret = video_get_subdev_format(video, &format);
 417         if (ret < 0)
 418                 return ret;
 419
 420         if (pix->pixelformat != sd_pix->pixelformat ||
 421             pix->height != sd_pix->height ||
 422             pix->width != sd_pix->width ||
 423             pix->num_planes != sd_pix->num_planes ||
 424             pix->field != format.fmt.pix_mp.field)
 425                 return -EPIPE;
 426
 427         return 0;
 428 }
 429
 430 static int video_start_streaming(struct vb2_queue *q, unsigned int count)
 431 {
 432         struct camss_video *video = vb2_get_drv_priv(q);
 433         struct video_device *vdev = &video->vdev;
 434         struct media_entity *entity;
 435         struct media_pad *pad;
 436         struct v4l2_subdev *subdev;
 437         int ret;
 438
 439         ret = media_pipeline_start(&vdev->entity, &video->pipe);
 440         if (ret < 0)
 441                 return ret;
 442
 443         ret = video_check_format(video);
 444         if (ret < 0)
 445                 goto error;
 446
 447         entity = &vdev->entity;
 448         while (1) {
 449                 pad = &entity->pads[0];
 450                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 451                         break;
 452
 453                 pad = media_entity_remote_pad(pad);
 454                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 455                         break;
 456
 457                 entity = pad->entity;
 458                 subdev = media_entity_to_v4l2_subdev(entity);
 459
 460                 ret = v4l2_subdev_call(subdev, video, s_stream, 1);
 461                 if (ret < 0 && ret != -ENOIOCTLCMD)
 462                         goto error;
 463         }
 464
 465         return 0;
 466
 467 error:
 468         media_pipeline_stop(&vdev->entity);
 469
 470         video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
 471
 472         return ret;
 473 }
 474
 475 static void video_stop_streaming(struct vb2_queue *q)
 476 {
 477         struct camss_video *video = vb2_get_drv_priv(q);
 478         struct video_device *vdev = &video->vdev;
 479         struct media_entity *entity;
 480         struct media_pad *pad;
 481         struct v4l2_subdev *subdev;
 482
 483         entity = &vdev->entity;
 484         while (1) {
 485                 pad = &entity->pads[0];
 486                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 487                         break;
 488
 489                 pad = media_entity_remote_pad(pad);
 490                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 491                         break;
 492
 493                 entity = pad->entity;
 494                 subdev = media_entity_to_v4l2_subdev(entity);
 495
 496                 v4l2_subdev_call(subdev, video, s_stream, 0);
 497         }
 498
 499         media_pipeline_stop(&vdev->entity);
 500
 501         video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
 502 }
 503
 504 static const struct vb2_ops msm_video_vb2_q_ops = {
 505         .queue_setup     = video_queue_setup,
 506         .wait_prepare    = vb2_ops_wait_prepare,
 507         .wait_finish     = vb2_ops_wait_finish,
 508         .buf_init        = video_buf_init,
 509         .buf_prepare     = video_buf_prepare,
 510         .buf_queue       = video_buf_queue,
 511         .start_streaming = video_start_streaming,
 512         .stop_streaming  = video_stop_streaming,
 513 };
 514
 515 /* -----------------------------------------------------------------------------
 516  * V4L2 ioctls
 517  */
 518
 519 static int video_querycap(struct file *file, void *fh,
 520                           struct v4l2_capability *cap)
 521 {
 522         struct camss_video *video = video_drvdata(file);
 523
 524         strscpy(cap->driver, "qcom-camss", sizeof(cap->driver));
 525         strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
 526         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 527                  dev_name(video->camss->dev));
 528
 529         return 0;
 530 }
 531
 532 static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 533 {
 534         struct camss_video *video = video_drvdata(file);
 535         int i, j, k;
 536
 537         if (f->type != video->type)
 538                 return -EINVAL;
 539
 540         if (f->index >= video->nformats)
 541                 return -EINVAL;
 542
 543         /* find index "i" of "k"th unique pixelformat in formats array */
 544         k = -1;
 545         for (i = 0; i < video->nformats; i++) {
 546                 for (j = 0; j < i; j++) {
 547                         if (video->formats[i].pixelformat ==
 548                                         video->formats[j].pixelformat)
 549                                 break;
 550                 }
 551
 552                 if (j == i)
 553                         k++;
 554
 555                 if (k == f->index)
 556                         break;
 557         }
 558
 559         if (k < f->index)
 560                 return -EINVAL;
 561
 562         f->pixelformat = video->formats[i].pixelformat;
 563
 564         return 0;
 565 }
 566
 567 static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
 568 {
 569         struct camss_video *video = video_drvdata(file);
 570
 571         *f = video->active_fmt;
 572
 573         return 0;
 574 }
 575
 576 static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f)
 577 {
 578         struct v4l2_pix_format_mplane *pix_mp;
 579         const struct camss_format_info *fi;
 580         struct v4l2_plane_pix_format *p;
 581         u32 bytesperline[3] = { 0 };
 582         u32 sizeimage[3] = { 0 };
 583         u32 width, height;
 584         u32 bpl, lines;
 585         int i, j;
 586
 587         pix_mp = &f->fmt.pix_mp;
 588
 589         if (video->line_based)
 590                 for (i = 0; i < pix_mp->num_planes && i < 3; i++) {
 591                         p = &pix_mp->plane_fmt[i];
 592                         bytesperline[i] = clamp_t(u32, p->bytesperline,
 593                                                   1, 65528);
 594                         sizeimage[i] = clamp_t(u32, p->sizeimage,
 595                                                bytesperline[i],
 596                                                bytesperline[i] * 4096);
 597                 }
 598
 599         for (j = 0; j < video->nformats; j++)
 600                 if (pix_mp->pixelformat == video->formats[j].pixelformat)
 601                         break;
 602
 603         if (j == video->nformats)
 604                 j = 0; /* default format */
 605
 606         fi = &video->formats[j];
 607         width = pix_mp->width;
 608         height = pix_mp->height;
 609
 610         memset(pix_mp, 0, sizeof(*pix_mp));
 611
 612         pix_mp->pixelformat = fi->pixelformat;
 613         pix_mp->width = clamp_t(u32, width, 1, 8191);
 614         pix_mp->height = clamp_t(u32, height, 1, 8191);
 615         pix_mp->num_planes = fi->planes;
 616         for (i = 0; i < pix_mp->num_planes; i++) {
 617                 bpl = pix_mp->width / fi->hsub[i].numerator *
 618                         fi->hsub[i].denominator * fi->bpp[i] / 8;
 619                 bpl = ALIGN(bpl, video->bpl_alignment);
 620                 pix_mp->plane_fmt[i].bytesperline = bpl;
 621                 pix_mp->plane_fmt[i].sizeimage = pix_mp->height /
 622                         fi->vsub[i].numerator * fi->vsub[i].denominator * bpl;
 623         }
 624
 625         pix_mp->field = V4L2_FIELD_NONE;
 626         pix_mp->colorspace = V4L2_COLORSPACE_SRGB;
 627         pix_mp->flags = 0;
 628         pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace);
 629         pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 630                                         pix_mp->colorspace, pix_mp->ycbcr_enc);
 631         pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace);
 632
 633         if (video->line_based)
 634                 for (i = 0; i < pix_mp->num_planes; i++) {
 635                         p = &pix_mp->plane_fmt[i];
 636                         p->bytesperline = clamp_t(u32, p->bytesperline,
 637                                                   1, 65528);
 638                         p->sizeimage = clamp_t(u32, p->sizeimage,
 639                                                p->bytesperline,
 640                                                p->bytesperline * 4096);
 641                         lines = p->sizeimage / p->bytesperline;
 642
 643                         if (p->bytesperline < bytesperline[i])
 644                                 p->bytesperline = ALIGN(bytesperline[i], 8);
 645
 646                         if (p->sizeimage < p->bytesperline * lines)
 647                                 p->sizeimage = p->bytesperline * lines;
 648
 649                         if (p->sizeimage < sizeimage[i])
 650                                 p->sizeimage = sizeimage[i];
 651                 }
 652
 653         return 0;
 654 }
 655
 656 static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
 657 {
 658         struct camss_video *video = video_drvdata(file);
 659
 660         return __video_try_fmt(video, f);
 661 }
 662
 663 static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 664 {
 665         struct camss_video *video = video_drvdata(file);
 666         int ret;
 667
 668         if (vb2_is_busy(&video->vb2_q))
 669                 return -EBUSY;
 670
 671         ret = __video_try_fmt(video, f);
 672         if (ret < 0)
 673                 return ret;
 674
 675         video->active_fmt = *f;
 676
 677         return 0;
 678 }
 679
 680 static int video_enum_input(struct file *file, void *fh,
 681                             struct v4l2_input *input)
 682 {
 683         if (input->index > 0)
 684                 return -EINVAL;
 685
 686         strscpy(input->name, "camera", sizeof(input->name));
 687         input->type = V4L2_INPUT_TYPE_CAMERA;
 688
 689         return 0;
 690 }
 691
 692 static int video_g_input(struct file *file, void *fh, unsigned int *input)
 693 {
 694         *input = 0;
 695
 696         return 0;
 697 }
 698
 699 static int video_s_input(struct file *file, void *fh, unsigned int input)
 700 {
 701         return input == 0 ? 0 : -EINVAL;
 702 }
 703
 704 static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = {
 705         .vidioc_querycap                = video_querycap,
 706         .vidioc_enum_fmt_vid_cap        = video_enum_fmt,
 707         .vidioc_g_fmt_vid_cap_mplane    = video_g_fmt,
 708         .vidioc_s_fmt_vid_cap_mplane    = video_s_fmt,
 709         .vidioc_try_fmt_vid_cap_mplane  = video_try_fmt,
 710         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 711         .vidioc_querybuf                = vb2_ioctl_querybuf,
 712         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 713         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 714         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 715         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 716         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 717         .vidioc_streamon                = vb2_ioctl_streamon,
 718         .vidioc_streamoff               = vb2_ioctl_streamoff,
 719         .vidioc_enum_input              = video_enum_input,
 720         .vidioc_g_input                 = video_g_input,
 721         .vidioc_s_input                 = video_s_input,
 722 };
 723
 724 /* -----------------------------------------------------------------------------
 725  * V4L2 file operations
 726  */
 727
 728 static int video_open(struct file *file)
 729 {
 730         struct video_device *vdev = video_devdata(file);
 731         struct camss_video *video = video_drvdata(file);
 732         struct v4l2_fh *vfh;
 733         int ret;
 734
 735         mutex_lock(&video->lock);
 736
 737         vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
 738         if (vfh == NULL) {
 739                 ret = -ENOMEM;
 740                 goto error_alloc;
 741         }
 742
 743         v4l2_fh_init(vfh, vdev);
 744         v4l2_fh_add(vfh);
 745
 746         file->private_data = vfh;
 747
 748         ret = v4l2_pipeline_pm_use(&vdev->entity, 1);
 749         if (ret < 0) {
 750                 dev_err(video->camss->dev, "Failed to power up pipeline: %d\n",
 751                         ret);
 752                 goto error_pm_use;
 753         }
 754
 755         mutex_unlock(&video->lock);
 756
 757         return 0;
 758
 759 error_pm_use:
 760         v4l2_fh_release(file);
 761
 762 error_alloc:
 763         mutex_unlock(&video->lock);
 764
 765         return ret;
 766 }
 767
 768 static int video_release(struct file *file)
 769 {
 770         struct video_device *vdev = video_devdata(file);
 771
 772         vb2_fop_release(file);
 773
 774         v4l2_pipeline_pm_use(&vdev->entity, 0);
 775
 776         file->private_data = NULL;
 777
 778         return 0;
 779 }
 780
 781 static const struct v4l2_file_operations msm_vid_fops = {
 782         .owner          = THIS_MODULE,
 783         .unlocked_ioctl = video_ioctl2,
 784         .open           = video_open,
 785         .release        = video_release,
 786         .poll           = vb2_fop_poll,
 787         .mmap           = vb2_fop_mmap,
 788         .read           = vb2_fop_read,
 789 };
 790
 791 /* -----------------------------------------------------------------------------
 792  * CAMSS video core
 793  */
 794
 795 static void msm_video_release(struct video_device *vdev)
 796 {
 797         struct camss_video *video = video_get_drvdata(vdev);
 798
 799         media_entity_cleanup(&vdev->entity);
 800
 801         mutex_destroy(&video->q_lock);
 802         mutex_destroy(&video->lock);
 803
 804         if (atomic_dec_and_test(&video->camss->ref_count))
 805                 camss_delete(video->camss);
 806 }
 807
 808 /*
 809  * msm_video_init_format - Helper function to initialize format
 810  * @video: struct camss_video
 811  *
 812  * Initialize pad format with default value.
 813  *
 814  * Return 0 on success or a negative error code otherwise
 815  */
 816 static int msm_video_init_format(struct camss_video *video)
 817 {
 818         int ret;
 819         struct v4l2_format format = {
 820                 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
 821                 .fmt.pix_mp = {
 822                         .width = 1920,
 823                         .height = 1080,
 824                         .pixelformat = video->formats[0].pixelformat,
 825                 },
 826         };
 827
 828         ret = __video_try_fmt(video, &format);
 829         if (ret < 0)
 830                 return ret;
 831
 832         video->active_fmt = format;
 833
 834         return 0;
 835 }
 836
 837 /*
 838  * msm_video_register - Register a video device node
 839  * @video: struct camss_video
 840  * @v4l2_dev: V4L2 device
 841  * @name: name to be used for the video device node
 842  *
 843  * Initialize and register a video device node to a V4L2 device. Also
 844  * initialize the vb2 queue.
 845  *
 846  * Return 0 on success or a negative error code otherwise
 847  */
 848
 849 int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev,
 850                        const char *name, int is_pix)
 851 {
 852         struct media_pad *pad = &video->pad;
 853         struct video_device *vdev;
 854         struct vb2_queue *q;
 855         int ret;
 856
 857         vdev = &video->vdev;
 858
 859         mutex_init(&video->q_lock);
 860
 861         q = &video->vb2_q;
 862         q->drv_priv = video;
 863         q->mem_ops = &vb2_dma_sg_memops;
 864         q->ops = &msm_video_vb2_q_ops;
 865         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 866         q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ;
 867         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 868         q->buf_struct_size = sizeof(struct camss_buffer);
 869         q->dev = video->camss->dev;
 870         q->lock = &video->q_lock;
 871         ret = vb2_queue_init(q);
 872         if (ret < 0) {
 873                 dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret);
 874                 goto error_vb2_init;
 875         }
 876
 877         pad->flags = MEDIA_PAD_FL_SINK;
 878         ret = media_entity_pads_init(&vdev->entity, 1, pad);
 879         if (ret < 0) {
 880                 dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n",
 881                         ret);
 882                 goto error_media_init;
 883         }
 884
 885         mutex_init(&video->lock);
 886
 887         if (video->camss->version == CAMSS_8x16) {
 888                 if (is_pix) {
 889                         video->formats = formats_pix_8x16;
 890                         video->nformats = ARRAY_SIZE(formats_pix_8x16);
 891                 } else {
 892                         video->formats = formats_rdi_8x16;
 893                         video->nformats = ARRAY_SIZE(formats_rdi_8x16);
 894                 }
 895         } else if (video->camss->version == CAMSS_8x96) {
 896                 if (is_pix) {
 897                         video->formats = formats_pix_8x96;
 898                         video->nformats = ARRAY_SIZE(formats_pix_8x96);
 899                 } else {
 900                         video->formats = formats_rdi_8x96;
 901                         video->nformats = ARRAY_SIZE(formats_rdi_8x96);
 902                 }
 903         } else {
 904                 goto error_video_register;
 905         }
 906
 907         ret = msm_video_init_format(video);
 908         if (ret < 0) {
 909                 dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret);
 910                 goto error_video_register;
 911         }
 912
 913         vdev->fops = &msm_vid_fops;
 914         vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING |
 915                                                         V4L2_CAP_READWRITE;
 916         vdev->ioctl_ops = &msm_vid_ioctl_ops;
 917         vdev->release = msm_video_release;
 918         vdev->v4l2_dev = v4l2_dev;
 919         vdev->vfl_dir = VFL_DIR_RX;
 920         vdev->queue = &video->vb2_q;
 921         vdev->lock = &video->lock;
 922         strscpy(vdev->name, name, sizeof(vdev->name));
 923
 924         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
 925         if (ret < 0) {
 926                 dev_err(v4l2_dev->dev, "Failed to register video device: %d\n",
 927                         ret);
 928                 goto error_video_register;
 929         }
 930
 931         video_set_drvdata(vdev, video);
 932         atomic_inc(&video->camss->ref_count);
 933
 934         return 0;
 935
 936 error_video_register:
 937         media_entity_cleanup(&vdev->entity);
 938         mutex_destroy(&video->lock);
 939 error_media_init:
 940         vb2_queue_release(&video->vb2_q);
 941 error_vb2_init:
 942         mutex_destroy(&video->q_lock);
 943
 944         return ret;
 945 }
 946
 947 void msm_video_stop_streaming(struct camss_video *video)
 948 {
 949         if (vb2_is_streaming(&video->vb2_q))
 950                 vb2_queue_release(&video->vb2_q);
 951 }
 952
 953 void msm_video_unregister(struct camss_video *video)
 954 {
 955         atomic_inc(&video->camss->ref_count);
 956         video_unregister_device(&video->vdev);
 957         atomic_dec(&video->camss->ref_count);
 958 }