1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2016 NextThing Co 4 * Copyright (C) 2016-2019 Bootlin 5 * 6 * Author: Maxime Ripard <maxime.ripard@bootlin.com> 7 */ 8 9 #include <linux/device.h> 10 #include <linux/pm_runtime.h> 11 12 #include <media/v4l2-ioctl.h> 13 #include <media/v4l2-mc.h> 14 #include <media/videobuf2-v4l2.h> 15 16 #include "sun4i_csi.h" 17 18 #define CSI_DEFAULT_WIDTH 640 19 #define CSI_DEFAULT_HEIGHT 480 20 21 static const struct sun4i_csi_format sun4i_csi_formats[] = { 22 /* YUV422 inputs */ 23 { 24 .mbus = MEDIA_BUS_FMT_YUYV8_2X8, 25 .fourcc = V4L2_PIX_FMT_YUV420M, 26 .input = CSI_INPUT_YUV, 27 .output = CSI_OUTPUT_YUV_420_PLANAR, 28 .num_planes = 3, 29 .bpp = { 8, 8, 8 }, 30 .hsub = 2, 31 .vsub = 2, 32 }, 33 }; 34 35 const struct sun4i_csi_format *sun4i_csi_find_format(const u32 *fourcc, 36 const u32 *mbus) 37 { 38 unsigned int i; 39 40 for (i = 0; i < ARRAY_SIZE(sun4i_csi_formats); i++) { 41 if (fourcc && *fourcc != sun4i_csi_formats[i].fourcc) 42 continue; 43 44 if (mbus && *mbus != sun4i_csi_formats[i].mbus) 45 continue; 46 47 return &sun4i_csi_formats[i]; 48 } 49 50 return NULL; 51 } 52 53 static int sun4i_csi_querycap(struct file *file, void *priv, 54 struct v4l2_capability *cap) 55 { 56 struct sun4i_csi *csi = video_drvdata(file); 57 58 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 59 strscpy(cap->card, "sun4i-csi", sizeof(cap->card)); 60 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", 61 dev_name(csi->dev)); 62 63 return 0; 64 } 65 66 static int sun4i_csi_enum_input(struct file *file, void *priv, 67 struct v4l2_input *inp) 68 { 69 if (inp->index != 0) 70 return -EINVAL; 71 72 inp->type = V4L2_INPUT_TYPE_CAMERA; 73 strscpy(inp->name, "Camera", sizeof(inp->name)); 74 75 return 0; 76 } 77 78 static int sun4i_csi_g_input(struct file *file, void *fh, 79 unsigned int *i) 80 { 81 *i = 0; 82 83 return 0; 84 } 85 86 static int sun4i_csi_s_input(struct file *file, void *fh, 87 unsigned int i) 88 { 89 if (i != 0) 90 return -EINVAL; 91 92 return 0; 93 } 94 95 static void _sun4i_csi_try_fmt(struct sun4i_csi *csi, 96 struct v4l2_pix_format_mplane *pix) 97 { 98 const struct sun4i_csi_format *_fmt; 99 unsigned int height, width; 100 unsigned int i; 101 102 _fmt = sun4i_csi_find_format(&pix->pixelformat, NULL); 103 if (!_fmt) 104 _fmt = &sun4i_csi_formats[0]; 105 106 pix->field = V4L2_FIELD_NONE; 107 pix->colorspace = V4L2_COLORSPACE_SRGB; 108 pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace); 109 pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace); 110 pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, pix->colorspace, 111 pix->ycbcr_enc); 112 113 pix->num_planes = _fmt->num_planes; 114 pix->pixelformat = _fmt->fourcc; 115 116 memset(pix->reserved, 0, sizeof(pix->reserved)); 117 118 /* Align the width and height on the subsampling */ 119 width = ALIGN(pix->width, _fmt->hsub); 120 height = ALIGN(pix->height, _fmt->vsub); 121 122 /* Clamp the width and height to our capabilities */ 123 pix->width = clamp(width, _fmt->hsub, CSI_MAX_WIDTH); 124 pix->height = clamp(height, _fmt->vsub, CSI_MAX_HEIGHT); 125 126 for (i = 0; i < _fmt->num_planes; i++) { 127 unsigned int hsub = i > 0 ? _fmt->hsub : 1; 128 unsigned int vsub = i > 0 ? _fmt->vsub : 1; 129 unsigned int bpl; 130 131 bpl = pix->width / hsub * _fmt->bpp[i] / 8; 132 pix->plane_fmt[i].bytesperline = bpl; 133 pix->plane_fmt[i].sizeimage = bpl * pix->height / vsub; 134 memset(pix->plane_fmt[i].reserved, 0, 135 sizeof(pix->plane_fmt[i].reserved)); 136 } 137 } 138 139 static int sun4i_csi_try_fmt_vid_cap(struct file *file, void *priv, 140 struct v4l2_format *f) 141 { 142 struct sun4i_csi *csi = video_drvdata(file); 143 144 _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp); 145 146 return 0; 147 } 148 149 static int sun4i_csi_s_fmt_vid_cap(struct file *file, void *priv, 150 struct v4l2_format *f) 151 { 152 struct sun4i_csi *csi = video_drvdata(file); 153 154 _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp); 155 csi->fmt = f->fmt.pix_mp; 156 157 return 0; 158 } 159 160 static int sun4i_csi_g_fmt_vid_cap(struct file *file, void *priv, 161 struct v4l2_format *f) 162 { 163 struct sun4i_csi *csi = video_drvdata(file); 164 165 f->fmt.pix_mp = csi->fmt; 166 167 return 0; 168 } 169 170 static int sun4i_csi_enum_fmt_vid_cap(struct file *file, void *priv, 171 struct v4l2_fmtdesc *f) 172 { 173 if (f->index >= ARRAY_SIZE(sun4i_csi_formats)) 174 return -EINVAL; 175 176 f->pixelformat = sun4i_csi_formats[f->index].fourcc; 177 178 return 0; 179 } 180 181 static const struct v4l2_ioctl_ops sun4i_csi_ioctl_ops = { 182 .vidioc_querycap = sun4i_csi_querycap, 183 184 .vidioc_enum_fmt_vid_cap = sun4i_csi_enum_fmt_vid_cap, 185 .vidioc_g_fmt_vid_cap_mplane = sun4i_csi_g_fmt_vid_cap, 186 .vidioc_s_fmt_vid_cap_mplane = sun4i_csi_s_fmt_vid_cap, 187 .vidioc_try_fmt_vid_cap_mplane = sun4i_csi_try_fmt_vid_cap, 188 189 .vidioc_enum_input = sun4i_csi_enum_input, 190 .vidioc_g_input = sun4i_csi_g_input, 191 .vidioc_s_input = sun4i_csi_s_input, 192 193 .vidioc_reqbufs = vb2_ioctl_reqbufs, 194 .vidioc_create_bufs = vb2_ioctl_create_bufs, 195 .vidioc_querybuf = vb2_ioctl_querybuf, 196 .vidioc_qbuf = vb2_ioctl_qbuf, 197 .vidioc_dqbuf = vb2_ioctl_dqbuf, 198 .vidioc_expbuf = vb2_ioctl_expbuf, 199 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 200 .vidioc_streamon = vb2_ioctl_streamon, 201 .vidioc_streamoff = vb2_ioctl_streamoff, 202 }; 203 204 static int sun4i_csi_open(struct file *file) 205 { 206 struct sun4i_csi *csi = video_drvdata(file); 207 int ret; 208 209 ret = mutex_lock_interruptible(&csi->lock); 210 if (ret) 211 return ret; 212 213 ret = pm_runtime_get_sync(csi->dev); 214 if (ret < 0) 215 goto err_pm_put; 216 217 ret = v4l2_pipeline_pm_get(&csi->vdev.entity); 218 if (ret) 219 goto err_pm_put; 220 221 ret = v4l2_fh_open(file); 222 if (ret) 223 goto err_pipeline_pm_put; 224 225 mutex_unlock(&csi->lock); 226 227 return 0; 228 229 err_pipeline_pm_put: 230 v4l2_pipeline_pm_put(&csi->vdev.entity); 231 232 err_pm_put: 233 pm_runtime_put(csi->dev); 234 mutex_unlock(&csi->lock); 235 236 return ret; 237 } 238 239 static int sun4i_csi_release(struct file *file) 240 { 241 struct sun4i_csi *csi = video_drvdata(file); 242 243 mutex_lock(&csi->lock); 244 245 _vb2_fop_release(file, NULL); 246 247 v4l2_pipeline_pm_put(&csi->vdev.entity); 248 pm_runtime_put(csi->dev); 249 250 mutex_unlock(&csi->lock); 251 252 return 0; 253 } 254 255 static const struct v4l2_file_operations sun4i_csi_fops = { 256 .owner = THIS_MODULE, 257 .open = sun4i_csi_open, 258 .release = sun4i_csi_release, 259 .unlocked_ioctl = video_ioctl2, 260 .poll = vb2_fop_poll, 261 .mmap = vb2_fop_mmap, 262 }; 263 264 static const struct v4l2_mbus_framefmt sun4i_csi_pad_fmt_default = { 265 .width = CSI_DEFAULT_WIDTH, 266 .height = CSI_DEFAULT_HEIGHT, 267 .code = MEDIA_BUS_FMT_YUYV8_2X8, 268 .field = V4L2_FIELD_NONE, 269 .colorspace = V4L2_COLORSPACE_RAW, 270 .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT, 271 .quantization = V4L2_QUANTIZATION_DEFAULT, 272 .xfer_func = V4L2_XFER_FUNC_DEFAULT, 273 }; 274 275 static int sun4i_csi_subdev_init_cfg(struct v4l2_subdev *subdev, 276 struct v4l2_subdev_pad_config *cfg) 277 { 278 struct v4l2_mbus_framefmt *fmt; 279 280 fmt = v4l2_subdev_get_try_format(subdev, cfg, CSI_SUBDEV_SINK); 281 *fmt = sun4i_csi_pad_fmt_default; 282 283 return 0; 284 } 285 286 static int sun4i_csi_subdev_get_fmt(struct v4l2_subdev *subdev, 287 struct v4l2_subdev_pad_config *cfg, 288 struct v4l2_subdev_format *fmt) 289 { 290 struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev); 291 struct v4l2_mbus_framefmt *subdev_fmt; 292 293 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) 294 subdev_fmt = v4l2_subdev_get_try_format(subdev, cfg, fmt->pad); 295 else 296 subdev_fmt = &csi->subdev_fmt; 297 298 fmt->format = *subdev_fmt; 299 300 return 0; 301 } 302 303 static int sun4i_csi_subdev_set_fmt(struct v4l2_subdev *subdev, 304 struct v4l2_subdev_pad_config *cfg, 305 struct v4l2_subdev_format *fmt) 306 { 307 struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev); 308 struct v4l2_mbus_framefmt *subdev_fmt; 309 310 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) 311 subdev_fmt = v4l2_subdev_get_try_format(subdev, cfg, fmt->pad); 312 else 313 subdev_fmt = &csi->subdev_fmt; 314 315 /* We can only set the format on the sink pad */ 316 if (fmt->pad == CSI_SUBDEV_SINK) { 317 /* It's the sink, only allow changing the frame size */ 318 subdev_fmt->width = fmt->format.width; 319 subdev_fmt->height = fmt->format.height; 320 subdev_fmt->code = fmt->format.code; 321 } 322 323 fmt->format = *subdev_fmt; 324 325 return 0; 326 } 327 328 static int 329 sun4i_csi_subdev_enum_mbus_code(struct v4l2_subdev *subdev, 330 struct v4l2_subdev_pad_config *cfg, 331 struct v4l2_subdev_mbus_code_enum *mbus) 332 { 333 if (mbus->index >= ARRAY_SIZE(sun4i_csi_formats)) 334 return -EINVAL; 335 336 mbus->code = sun4i_csi_formats[mbus->index].mbus; 337 338 return 0; 339 } 340 341 static const struct v4l2_subdev_pad_ops sun4i_csi_subdev_pad_ops = { 342 .link_validate = v4l2_subdev_link_validate_default, 343 .init_cfg = sun4i_csi_subdev_init_cfg, 344 .get_fmt = sun4i_csi_subdev_get_fmt, 345 .set_fmt = sun4i_csi_subdev_set_fmt, 346 .enum_mbus_code = sun4i_csi_subdev_enum_mbus_code, 347 }; 348 349 const struct v4l2_subdev_ops sun4i_csi_subdev_ops = { 350 .pad = &sun4i_csi_subdev_pad_ops, 351 }; 352 353 int sun4i_csi_v4l2_register(struct sun4i_csi *csi) 354 { 355 struct video_device *vdev = &csi->vdev; 356 int ret; 357 358 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING; 359 vdev->v4l2_dev = &csi->v4l; 360 vdev->queue = &csi->queue; 361 strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name)); 362 vdev->release = video_device_release_empty; 363 vdev->lock = &csi->lock; 364 365 /* Set a default format */ 366 csi->fmt.pixelformat = sun4i_csi_formats[0].fourcc, 367 csi->fmt.width = CSI_DEFAULT_WIDTH; 368 csi->fmt.height = CSI_DEFAULT_HEIGHT; 369 _sun4i_csi_try_fmt(csi, &csi->fmt); 370 csi->subdev_fmt = sun4i_csi_pad_fmt_default; 371 372 vdev->fops = &sun4i_csi_fops; 373 vdev->ioctl_ops = &sun4i_csi_ioctl_ops; 374 video_set_drvdata(vdev, csi); 375 376 ret = video_register_device(&csi->vdev, VFL_TYPE_VIDEO, -1); 377 if (ret) 378 return ret; 379 380 dev_info(csi->dev, "Device registered as %s\n", 381 video_device_node_name(vdev)); 382 383 return 0; 384 } 385