// SPDX-License-Identifier: GPL-2.0-only /* * TI Camera Access Layer (CAL) - Video Device * * Copyright (c) 2015-2020 Texas Instruments Inc. * * Authors: * Benoit Parrot * Laurent Pinchart */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cal.h" /* ------------------------------------------------------------------ * Format Handling * ------------------------------------------------------------------ */ static const struct cal_fmt cal_formats[] = { { .fourcc = V4L2_PIX_FMT_YUYV, .code = MEDIA_BUS_FMT_YUYV8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_UYVY, .code = MEDIA_BUS_FMT_UYVY8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_YVYU, .code = MEDIA_BUS_FMT_YVYU8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_VYUY, .code = MEDIA_BUS_FMT_VYUY8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */ .code = MEDIA_BUS_FMT_RGB565_2X8_LE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ .code = MEDIA_BUS_FMT_RGB565_2X8_BE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */ .code = MEDIA_BUS_FMT_RGB888_2X12_LE, .bpp = 24, }, { .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */ .code = MEDIA_BUS_FMT_RGB888_2X12_BE, .bpp = 24, }, { .fourcc = V4L2_PIX_FMT_RGB32, /* argb */ .code = MEDIA_BUS_FMT_ARGB8888_1X32, .bpp = 32, }, { .fourcc = V4L2_PIX_FMT_SBGGR8, .code = MEDIA_BUS_FMT_SBGGR8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SGBRG8, .code = MEDIA_BUS_FMT_SGBRG8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SGRBG8, .code = MEDIA_BUS_FMT_SGRBG8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SRGGB8, .code = MEDIA_BUS_FMT_SRGGB8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SBGGR10, .code = MEDIA_BUS_FMT_SBGGR10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SGBRG10, .code = MEDIA_BUS_FMT_SGBRG10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SGRBG10, .code = MEDIA_BUS_FMT_SGRBG10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SRGGB10, .code = MEDIA_BUS_FMT_SRGGB10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SBGGR12, .code = MEDIA_BUS_FMT_SBGGR12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SGBRG12, .code = MEDIA_BUS_FMT_SGBRG12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SGRBG12, .code = MEDIA_BUS_FMT_SGRBG12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SRGGB12, .code = MEDIA_BUS_FMT_SRGGB12_1X12, .bpp = 12, }, }; /* Print Four-character-code (FOURCC) */ static char *fourcc_to_str(u32 fmt) { static char code[5]; code[0] = (unsigned char)(fmt & 0xff); code[1] = (unsigned char)((fmt >> 8) & 0xff); code[2] = (unsigned char)((fmt >> 16) & 0xff); code[3] = (unsigned char)((fmt >> 24) & 0xff); code[4] = '\0'; return code; } /* ------------------------------------------------------------------ * V4L2 Video IOCTLs * ------------------------------------------------------------------ */ static const struct cal_fmt *find_format_by_pix(struct cal_ctx *ctx, u32 pixelformat) { const struct cal_fmt *fmt; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmt = ctx->active_fmt[k]; if (fmt->fourcc == pixelformat) return fmt; } return NULL; } static const struct cal_fmt *find_format_by_code(struct cal_ctx *ctx, u32 code) { const struct cal_fmt *fmt; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmt = ctx->active_fmt[k]; if (fmt->code == code) return fmt; } return NULL; } static int cal_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct cal_ctx *ctx = video_drvdata(file); strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver)); strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card)); snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev_name(ctx->cal->dev)); return 0; } static int cal_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; if (f->index >= ctx->num_active_fmt) return -EINVAL; fmt = ctx->active_fmt[f->index]; f->pixelformat = fmt->fourcc; f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; return 0; } static int __subdev_get_format(struct cal_ctx *ctx, struct v4l2_mbus_framefmt *fmt) { struct v4l2_subdev_format sd_fmt; struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; int ret; sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; sd_fmt.pad = 0; ret = v4l2_subdev_call(ctx->phy->sensor, pad, get_fmt, NULL, &sd_fmt); if (ret) return ret; *fmt = *mbus_fmt; ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, fmt->width, fmt->height, fmt->code); return 0; } static int __subdev_set_format(struct cal_ctx *ctx, struct v4l2_mbus_framefmt *fmt) { struct v4l2_subdev_format sd_fmt; struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; int ret; sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; sd_fmt.pad = 0; *mbus_fmt = *fmt; ret = v4l2_subdev_call(ctx->phy->sensor, pad, set_fmt, NULL, &sd_fmt); if (ret) return ret; ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, fmt->width, fmt->height, fmt->code); return 0; } static int cal_calc_format_size(struct cal_ctx *ctx, const struct cal_fmt *fmt, struct v4l2_format *f) { u32 bpl, max_width; if (!fmt) { ctx_dbg(3, ctx, "No cal_fmt provided!\n"); return -EINVAL; } /* * Maximum width is bound by the DMA max width in bytes. * We need to recalculate the actual maxi width depending on the * number of bytes per pixels required. */ max_width = MAX_WIDTH_BYTES / (ALIGN(fmt->bpp, 8) >> 3); v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2, &f->fmt.pix.height, 32, MAX_HEIGHT_LINES, 0, 0); bpl = (f->fmt.pix.width * ALIGN(fmt->bpp, 8)) >> 3; f->fmt.pix.bytesperline = ALIGN(bpl, 16); f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n", __func__, fourcc_to_str(f->fmt.pix.pixelformat), f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); return 0; } static int cal_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); *f = ctx->v_fmt; return 0; } static int cal_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_size_enum fse; int ret, found; fmt = find_format_by_pix(ctx, f->fmt.pix.pixelformat); if (!fmt) { ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n", f->fmt.pix.pixelformat); /* Just get the first one enumerated */ fmt = ctx->active_fmt[0]; f->fmt.pix.pixelformat = fmt->fourcc; } f->fmt.pix.field = ctx->v_fmt.fmt.pix.field; /* check for/find a valid width/height */ ret = 0; found = false; fse.pad = 0; fse.code = fmt->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; for (fse.index = 0; ; fse.index++) { ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_size, NULL, &fse); if (ret) break; if ((f->fmt.pix.width == fse.max_width) && (f->fmt.pix.height == fse.max_height)) { found = true; break; } else if ((f->fmt.pix.width >= fse.min_width) && (f->fmt.pix.width <= fse.max_width) && (f->fmt.pix.height >= fse.min_height) && (f->fmt.pix.height <= fse.max_height)) { found = true; break; } } if (!found) { /* use existing values as default */ f->fmt.pix.width = ctx->v_fmt.fmt.pix.width; f->fmt.pix.height = ctx->v_fmt.fmt.pix.height; } /* * Use current colorspace for now, it will get * updated properly during s_fmt */ f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace; return cal_calc_format_size(ctx, fmt, f); } static int cal_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); struct vb2_queue *q = &ctx->vb_vidq; const struct cal_fmt *fmt; struct v4l2_mbus_framefmt mbus_fmt; int ret; if (vb2_is_busy(q)) { ctx_dbg(3, ctx, "%s device busy\n", __func__); return -EBUSY; } ret = cal_try_fmt_vid_cap(file, priv, f); if (ret < 0) return ret; fmt = find_format_by_pix(ctx, f->fmt.pix.pixelformat); v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code); ret = __subdev_set_format(ctx, &mbus_fmt); if (ret) return ret; /* Just double check nothing has gone wrong */ if (mbus_fmt.code != fmt->code) { ctx_dbg(3, ctx, "%s subdev changed format on us, this should not happen\n", __func__); return -EINVAL; } v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt); ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ctx->v_fmt.fmt.pix.pixelformat = fmt->fourcc; cal_calc_format_size(ctx, fmt, &ctx->v_fmt); ctx->fmt = fmt; ctx->m_fmt = mbus_fmt; *f = ctx->v_fmt; return 0; } static int cal_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_size_enum fse; int ret; /* check for valid format */ fmt = find_format_by_pix(ctx, fsize->pixel_format); if (!fmt) { ctx_dbg(3, ctx, "Invalid pixel code: %x\n", fsize->pixel_format); return -EINVAL; } fse.index = fsize->index; fse.pad = 0; fse.code = fmt->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_size, NULL, &fse); if (ret) return ret; ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n", __func__, fse.index, fse.code, fse.min_width, fse.max_width, fse.min_height, fse.max_height); fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; fsize->discrete.width = fse.max_width; fsize->discrete.height = fse.max_height; return 0; } static int cal_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { if (inp->index > 0) return -EINVAL; inp->type = V4L2_INPUT_TYPE_CAMERA; sprintf(inp->name, "Camera %u", inp->index); return 0; } static int cal_g_input(struct file *file, void *priv, unsigned int *i) { *i = 0; return 0; } static int cal_s_input(struct file *file, void *priv, unsigned int i) { return i > 0 ? -EINVAL : 0; } /* timeperframe is arbitrary and continuous */ static int cal_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fival) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_interval_enum fie = { .index = fival->index, .width = fival->width, .height = fival->height, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; int ret; fmt = find_format_by_pix(ctx, fival->pixel_format); if (!fmt) return -EINVAL; fie.code = fmt->code; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_interval, NULL, &fie); if (ret) return ret; fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; fival->discrete = fie.interval; return 0; } static const struct v4l2_file_operations cal_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, .release = vb2_fop_release, .read = vb2_fop_read, .poll = vb2_fop_poll, .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ .mmap = vb2_fop_mmap, }; static const struct v4l2_ioctl_ops cal_ioctl_ops = { .vidioc_querycap = cal_querycap, .vidioc_enum_fmt_vid_cap = cal_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, .vidioc_try_fmt_vid_cap = cal_try_fmt_vid_cap, .vidioc_s_fmt_vid_cap = cal_s_fmt_vid_cap, .vidioc_enum_framesizes = cal_enum_framesizes, .vidioc_reqbufs = vb2_ioctl_reqbufs, .vidioc_create_bufs = vb2_ioctl_create_bufs, .vidioc_prepare_buf = vb2_ioctl_prepare_buf, .vidioc_querybuf = vb2_ioctl_querybuf, .vidioc_qbuf = vb2_ioctl_qbuf, .vidioc_dqbuf = vb2_ioctl_dqbuf, .vidioc_expbuf = vb2_ioctl_expbuf, .vidioc_enum_input = cal_enum_input, .vidioc_g_input = cal_g_input, .vidioc_s_input = cal_s_input, .vidioc_enum_frameintervals = cal_enum_frameintervals, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; /* ------------------------------------------------------------------ * videobuf2 Operations * ------------------------------------------------------------------ */ static int cal_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); unsigned int size = ctx->v_fmt.fmt.pix.sizeimage; if (vq->num_buffers + *nbuffers < 3) *nbuffers = 3 - vq->num_buffers; if (*nplanes) { if (sizes[0] < size) return -EINVAL; size = sizes[0]; } *nplanes = 1; sizes[0] = size; ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]); return 0; } static int cal_buffer_prepare(struct vb2_buffer *vb) { struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); struct cal_buffer *buf = container_of(vb, struct cal_buffer, vb.vb2_buf); unsigned long size; if (WARN_ON(!ctx->fmt)) return -EINVAL; size = ctx->v_fmt.fmt.pix.sizeimage; if (vb2_plane_size(vb, 0) < size) { ctx_err(ctx, "data will not fit into plane (%lu < %lu)\n", vb2_plane_size(vb, 0), size); return -EINVAL; } vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); return 0; } static void cal_buffer_queue(struct vb2_buffer *vb) { struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); struct cal_buffer *buf = container_of(vb, struct cal_buffer, vb.vb2_buf); struct cal_dmaqueue *vidq = &ctx->vidq; unsigned long flags; /* recheck locking */ spin_lock_irqsave(&ctx->slock, flags); list_add_tail(&buf->list, &vidq->active); spin_unlock_irqrestore(&ctx->slock, flags); } static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf, *tmp; unsigned long addr; unsigned long flags; int ret; spin_lock_irqsave(&ctx->slock, flags); if (list_empty(&dma_q->active)) { spin_unlock_irqrestore(&ctx->slock, flags); ctx_dbg(3, ctx, "buffer queue is empty\n"); return -EIO; } buf = list_entry(dma_q->active.next, struct cal_buffer, list); ctx->cur_frm = buf; ctx->next_frm = buf; list_del(&buf->list); spin_unlock_irqrestore(&ctx->slock, flags); addr = vb2_dma_contig_plane_dma_addr(&ctx->cur_frm->vb.vb2_buf, 0); ctx->sequence = 0; pm_runtime_get_sync(ctx->cal->dev); cal_ctx_csi2_config(ctx); cal_ctx_pix_proc_config(ctx); cal_ctx_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline, ctx->v_fmt.fmt.pix.height); cal_camerarx_enable_irqs(ctx->phy); ret = cal_camerarx_start(ctx->phy, ctx->fmt); if (ret) goto err; cal_ctx_wr_dma_addr(ctx, addr); cal_camerarx_ppi_enable(ctx->phy); if (cal_debug >= 4) cal_quickdump_regs(ctx->cal); return 0; err: spin_lock_irqsave(&ctx->slock, flags); vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED); ctx->cur_frm = NULL; ctx->next_frm = NULL; list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); } spin_unlock_irqrestore(&ctx->slock, flags); return ret; } static void cal_stop_streaming(struct vb2_queue *vq) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf, *tmp; unsigned long timeout; unsigned long flags; bool dma_act; cal_camerarx_ppi_disable(ctx->phy); /* wait for stream and dma to finish */ dma_act = true; timeout = jiffies + msecs_to_jiffies(500); while (dma_act && time_before(jiffies, timeout)) { msleep(50); spin_lock_irqsave(&ctx->slock, flags); dma_act = ctx->dma_act; spin_unlock_irqrestore(&ctx->slock, flags); } if (dma_act) ctx_err(ctx, "failed to disable dma cleanly\n"); cal_camerarx_disable_irqs(ctx->phy); cal_camerarx_stop(ctx->phy); /* Release all active buffers */ spin_lock_irqsave(&ctx->slock, flags); list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); } if (ctx->cur_frm == ctx->next_frm) { vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); } else { vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); vb2_buffer_done(&ctx->next_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); } ctx->cur_frm = NULL; ctx->next_frm = NULL; spin_unlock_irqrestore(&ctx->slock, flags); pm_runtime_put_sync(ctx->cal->dev); } static const struct vb2_ops cal_video_qops = { .queue_setup = cal_queue_setup, .buf_prepare = cal_buffer_prepare, .buf_queue = cal_buffer_queue, .start_streaming = cal_start_streaming, .stop_streaming = cal_stop_streaming, .wait_prepare = vb2_ops_wait_prepare, .wait_finish = vb2_ops_wait_finish, }; /* ------------------------------------------------------------------ * V4L2 Initialization and Registration * ------------------------------------------------------------------ */ static const struct video_device cal_videodev = { .name = CAL_MODULE_NAME, .fops = &cal_fops, .ioctl_ops = &cal_ioctl_ops, .minor = -1, .release = video_device_release_empty, .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | V4L2_CAP_READWRITE, }; static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx) { struct v4l2_subdev_mbus_code_enum mbus_code; struct v4l2_mbus_framefmt mbus_fmt; const struct cal_fmt *fmt; unsigned int i, j, k; int ret = 0; /* Enumerate sub device formats and enable all matching local formats */ ctx->active_fmt = devm_kcalloc(ctx->cal->dev, ARRAY_SIZE(cal_formats), sizeof(*ctx->active_fmt), GFP_KERNEL); ctx->num_active_fmt = 0; for (j = 0, i = 0; ret != -EINVAL; ++j) { memset(&mbus_code, 0, sizeof(mbus_code)); mbus_code.index = j; mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_mbus_code, NULL, &mbus_code); if (ret) continue; ctx_dbg(2, ctx, "subdev %s: code: %04x idx: %u\n", ctx->phy->sensor->name, mbus_code.code, j); for (k = 0; k < ARRAY_SIZE(cal_formats); k++) { const struct cal_fmt *fmt = &cal_formats[k]; if (mbus_code.code == fmt->code) { ctx->active_fmt[i] = fmt; ctx_dbg(2, ctx, "matched fourcc: %s: code: %04x idx: %u\n", fourcc_to_str(fmt->fourcc), fmt->code, i); ctx->num_active_fmt = ++i; } } } if (i == 0) { ctx_err(ctx, "No suitable format reported by subdev %s\n", ctx->phy->sensor->name); return -EINVAL; } ret = __subdev_get_format(ctx, &mbus_fmt); if (ret) return ret; fmt = find_format_by_code(ctx, mbus_fmt.code); if (!fmt) { ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n", mbus_fmt.code); return -EINVAL; } /* Save current subdev format */ v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt); ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ctx->v_fmt.fmt.pix.pixelformat = fmt->fourcc; cal_calc_format_size(ctx, fmt, &ctx->v_fmt); ctx->fmt = fmt; ctx->m_fmt = mbus_fmt; return 0; } int cal_ctx_v4l2_register(struct cal_ctx *ctx) { struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; struct video_device *vfd = &ctx->vdev; int ret; ret = cal_ctx_v4l2_init_formats(ctx); if (ret) return ret; ret = v4l2_ctrl_add_handler(hdl, ctx->phy->sensor->ctrl_handler, NULL, true); if (ret < 0) { ctx_err(ctx, "Failed to add sensor ctrl handler\n"); return ret; } ret = video_register_device(vfd, VFL_TYPE_VIDEO, cal_video_nr); if (ret < 0) { ctx_err(ctx, "Failed to register video device\n"); return ret; } ctx_info(ctx, "V4L2 device registered as %s\n", video_device_node_name(vfd)); return 0; } void cal_ctx_v4l2_unregister(struct cal_ctx *ctx) { ctx_dbg(1, ctx, "unregistering %s\n", video_device_node_name(&ctx->vdev)); video_unregister_device(&ctx->vdev); } int cal_ctx_v4l2_init(struct cal_ctx *ctx) { struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; struct video_device *vfd = &ctx->vdev; struct vb2_queue *q = &ctx->vb_vidq; int ret; INIT_LIST_HEAD(&ctx->vidq.active); spin_lock_init(&ctx->slock); mutex_init(&ctx->mutex); /* Initialize the vb2 queue. */ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; q->drv_priv = ctx; q->buf_struct_size = sizeof(struct cal_buffer); q->ops = &cal_video_qops; q->mem_ops = &vb2_dma_contig_memops; q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; q->lock = &ctx->mutex; q->min_buffers_needed = 3; q->dev = ctx->cal->dev; ret = vb2_queue_init(q); if (ret) return ret; /* Initialize the video device and media entity. */ *vfd = cal_videodev; vfd->v4l2_dev = &ctx->cal->v4l2_dev; vfd->queue = q; snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->index); vfd->lock = &ctx->mutex; video_set_drvdata(vfd, ctx); ctx->pad.flags = MEDIA_PAD_FL_SINK; ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad); if (ret < 0) return ret; /* Initialize the control handler. */ ret = v4l2_ctrl_handler_init(hdl, 11); if (ret < 0) { ctx_err(ctx, "Failed to init ctrl handler\n"); goto error; } vfd->ctrl_handler = hdl; return 0; error: media_entity_cleanup(&vfd->entity); return ret; } void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx) { v4l2_ctrl_handler_free(&ctx->ctrl_handler); media_entity_cleanup(&ctx->vdev.entity); }