// 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 "cal.h" /* 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 Common IOCTLs * ------------------------------------------------------------------ */ static int cal_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver)); strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card)); 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; } /* ------------------------------------------------------------------ * V4L2 Video Node Centric IOCTLs * ------------------------------------------------------------------ */ static const struct cal_format_info *find_format_by_pix(struct cal_ctx *ctx, u32 pixelformat) { const struct cal_format_info *fmtinfo; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmtinfo = ctx->active_fmt[k]; if (fmtinfo->fourcc == pixelformat) return fmtinfo; } return NULL; } static const struct cal_format_info *find_format_by_code(struct cal_ctx *ctx, u32 code) { const struct cal_format_info *fmtinfo; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmtinfo = ctx->active_fmt[k]; if (fmtinfo->code == code) return fmtinfo; } return NULL; } static int cal_legacy_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; if (f->index >= ctx->num_active_fmt) return -EINVAL; fmtinfo = ctx->active_fmt[f->index]; f->pixelformat = fmtinfo->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->source, 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->source, 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 void cal_calc_format_size(struct cal_ctx *ctx, const struct cal_format_info *fmtinfo, struct v4l2_format *f) { u32 bpl, max_width; /* * 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 = CAL_MAX_WIDTH_BYTES / (ALIGN(fmtinfo->bpp, 8) >> 3); v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2, &f->fmt.pix.height, 32, CAL_MAX_HEIGHT_LINES, 0, 0); bpl = (f->fmt.pix.width * ALIGN(fmtinfo->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); } static int cal_legacy_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; struct v4l2_subdev_frame_size_enum fse; int ret, found; fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat); if (!fmtinfo) { ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n", f->fmt.pix.pixelformat); /* Just get the first one enumerated */ fmtinfo = ctx->active_fmt[0]; f->fmt.pix.pixelformat = fmtinfo->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 = fmtinfo->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; for (fse.index = 0; ; fse.index++) { ret = v4l2_subdev_call(ctx->phy->source, 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; cal_calc_format_size(ctx, fmtinfo, f); return 0; } static int cal_legacy_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; struct v4l2_subdev_format sd_fmt = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, .pad = CAL_CAMERARX_PAD_SINK, }; const struct cal_format_info *fmtinfo; int ret; if (vb2_is_busy(q)) { ctx_dbg(3, ctx, "%s device busy\n", __func__); return -EBUSY; } ret = cal_legacy_try_fmt_vid_cap(file, priv, f); if (ret < 0) return ret; fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat); v4l2_fill_mbus_format(&sd_fmt.format, &f->fmt.pix, fmtinfo->code); ret = __subdev_set_format(ctx, &sd_fmt.format); if (ret) return ret; /* Just double check nothing has gone wrong */ if (sd_fmt.format.code != fmtinfo->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, &sd_fmt.format); ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc; ctx->v_fmt.fmt.pix.field = sd_fmt.format.field; cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); v4l2_subdev_call(&ctx->phy->subdev, pad, set_fmt, NULL, &sd_fmt); ctx->fmtinfo = fmtinfo; *f = ctx->v_fmt; return 0; } static int cal_legacy_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; struct v4l2_subdev_frame_size_enum fse; int ret; /* check for valid format */ fmtinfo = find_format_by_pix(ctx, fsize->pixel_format); if (!fmtinfo) { ctx_dbg(3, ctx, "Invalid pixel code: %x\n", fsize->pixel_format); return -EINVAL; } fse.index = fsize->index; fse.pad = 0; fse.code = fmtinfo->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->source, 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_legacy_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_legacy_g_input(struct file *file, void *priv, unsigned int *i) { *i = 0; return 0; } static int cal_legacy_s_input(struct file *file, void *priv, unsigned int i) { return i > 0 ? -EINVAL : 0; } /* timeperframe is arbitrary and continuous */ static int cal_legacy_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fival) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; struct v4l2_subdev_frame_interval_enum fie = { .index = fival->index, .width = fival->width, .height = fival->height, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; int ret; fmtinfo = find_format_by_pix(ctx, fival->pixel_format); if (!fmtinfo) return -EINVAL; fie.code = fmtinfo->code; ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_interval, NULL, &fie); if (ret) return ret; fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; fival->discrete = fie.interval; return 0; } static int cal_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct cal_ctx *ctx = video_drvdata(file); return v4l2_g_parm_cap(video_devdata(file), ctx->phy->source, a); } static int cal_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct cal_ctx *ctx = video_drvdata(file); return v4l2_s_parm_cap(video_devdata(file), ctx->phy->source, a); } static const struct v4l2_ioctl_ops cal_ioctl_legacy_ops = { .vidioc_querycap = cal_querycap, .vidioc_enum_fmt_vid_cap = cal_legacy_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, .vidioc_try_fmt_vid_cap = cal_legacy_try_fmt_vid_cap, .vidioc_s_fmt_vid_cap = cal_legacy_s_fmt_vid_cap, .vidioc_enum_framesizes = cal_legacy_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_legacy_enum_input, .vidioc_g_input = cal_legacy_g_input, .vidioc_s_input = cal_legacy_s_input, .vidioc_enum_frameintervals = cal_legacy_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, .vidioc_g_parm = cal_legacy_g_parm, .vidioc_s_parm = cal_legacy_s_parm, }; /* ------------------------------------------------------------------ * V4L2 Media Controller Centric IOCTLs * ------------------------------------------------------------------ */ static int cal_mc_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { unsigned int i; unsigned int idx; if (f->index >= cal_num_formats) return -EINVAL; idx = 0; for (i = 0; i < cal_num_formats; ++i) { if (f->mbus_code && cal_formats[i].code != f->mbus_code) continue; if (idx == f->index) { f->pixelformat = cal_formats[i].fourcc; f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; return 0; } idx++; } return -EINVAL; } static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f, const struct cal_format_info **info) { struct v4l2_pix_format *format = &f->fmt.pix; const struct cal_format_info *fmtinfo; unsigned int bpp; /* * Default to the first format if the requested pixel format code isn't * supported. */ fmtinfo = cal_format_by_fourcc(f->fmt.pix.pixelformat); if (!fmtinfo) fmtinfo = &cal_formats[0]; /* * Clamp the size, update the pixel format. The field and colorspace are * accepted as-is, except for V4L2_FIELD_ANY that is turned into * V4L2_FIELD_NONE. */ bpp = ALIGN(fmtinfo->bpp, 8); format->width = clamp_t(unsigned int, format->width, CAL_MIN_WIDTH_BYTES * 8 / bpp, CAL_MAX_WIDTH_BYTES * 8 / bpp); format->height = clamp_t(unsigned int, format->height, CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES); format->pixelformat = fmtinfo->fourcc; if (format->field == V4L2_FIELD_ANY) format->field = V4L2_FIELD_NONE; /* * Calculate the number of bytes per line and the image size. The * hardware stores the stride as a number of 16 bytes words, in a * signed 15-bit value. Only 14 bits are thus usable. */ format->bytesperline = ALIGN(clamp(format->bytesperline, format->width * bpp / 8, ((1U << 14) - 1) * 16), 16); format->sizeimage = format->height * format->bytesperline; format->colorspace = ctx->v_fmt.fmt.pix.colorspace; if (info) *info = fmtinfo; ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n", __func__, fourcc_to_str(format->pixelformat), format->width, format->height, format->bytesperline, format->sizeimage); } static int cal_mc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); cal_mc_try_fmt(ctx, f, NULL); return 0; } static int cal_mc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; if (vb2_is_busy(&ctx->vb_vidq)) { ctx_dbg(3, ctx, "%s device busy\n", __func__); return -EBUSY; } cal_mc_try_fmt(ctx, f, &fmtinfo); ctx->v_fmt = *f; ctx->fmtinfo = fmtinfo; return 0; } static int cal_mc_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_format_info *fmtinfo; unsigned int bpp; if (fsize->index > 0) return -EINVAL; fmtinfo = cal_format_by_fourcc(fsize->pixel_format); if (!fmtinfo) { ctx_dbg(3, ctx, "Invalid pixel format 0x%08x\n", fsize->pixel_format); return -EINVAL; } bpp = ALIGN(fmtinfo->bpp, 8); fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; fsize->stepwise.min_width = CAL_MIN_WIDTH_BYTES * 8 / bpp; fsize->stepwise.max_width = CAL_MAX_WIDTH_BYTES * 8 / bpp; fsize->stepwise.step_width = 64 / bpp; fsize->stepwise.min_height = CAL_MIN_HEIGHT_LINES; fsize->stepwise.max_height = CAL_MAX_HEIGHT_LINES; fsize->stepwise.step_height = 1; return 0; } static const struct v4l2_ioctl_ops cal_ioctl_mc_ops = { .vidioc_querycap = cal_querycap, .vidioc_enum_fmt_vid_cap = cal_mc_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, .vidioc_try_fmt_vid_cap = cal_mc_try_fmt_vid_cap, .vidioc_s_fmt_vid_cap = cal_mc_s_fmt_vid_cap, .vidioc_enum_framesizes = cal_mc_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_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_log_status = v4l2_ctrl_log_status, }; /* ------------------------------------------------------------------ * videobuf2 Common 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; 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); unsigned long flags; /* recheck locking */ spin_lock_irqsave(&ctx->dma.lock, flags); list_add_tail(&buf->list, &ctx->dma.queue); spin_unlock_irqrestore(&ctx->dma.lock, flags); } static void cal_release_buffers(struct cal_ctx *ctx, enum vb2_buffer_state state) { struct cal_buffer *buf, *tmp; /* Release all queued buffers. */ spin_lock_irq(&ctx->dma.lock); list_for_each_entry_safe(buf, tmp, &ctx->dma.queue, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, state); } if (ctx->dma.pending) { vb2_buffer_done(&ctx->dma.pending->vb.vb2_buf, state); ctx->dma.pending = NULL; } if (ctx->dma.active) { vb2_buffer_done(&ctx->dma.active->vb.vb2_buf, state); ctx->dma.active = NULL; } spin_unlock_irq(&ctx->dma.lock); } /* ------------------------------------------------------------------ * videobuf2 Operations * ------------------------------------------------------------------ */ static int cal_video_check_format(struct cal_ctx *ctx) { const struct v4l2_mbus_framefmt *format; struct media_pad *remote_pad; remote_pad = media_entity_remote_pad(&ctx->pad); if (!remote_pad) return -ENODEV; format = &ctx->phy->formats[remote_pad->index]; if (ctx->fmtinfo->code != format->code || ctx->v_fmt.fmt.pix.height != format->height || ctx->v_fmt.fmt.pix.width != format->width || ctx->v_fmt.fmt.pix.field != format->field) return -EPIPE; return 0; } static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); struct cal_buffer *buf; dma_addr_t addr; int ret; ret = media_pipeline_start(&ctx->vdev.entity, &ctx->phy->pipe); if (ret < 0) { ctx_err(ctx, "Failed to start media pipeline: %d\n", ret); goto error_release_buffers; } /* * Verify that the currently configured format matches the output of * the connected CAMERARX. */ ret = cal_video_check_format(ctx); if (ret < 0) { ctx_dbg(3, ctx, "Format mismatch between CAMERARX and video node\n"); goto error_pipeline; } ret = cal_ctx_prepare(ctx); if (ret) { ctx_err(ctx, "Failed to prepare context: %d\n", ret); goto error_pipeline; } spin_lock_irq(&ctx->dma.lock); buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list); ctx->dma.active = buf; list_del(&buf->list); spin_unlock_irq(&ctx->dma.lock); addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); ret = pm_runtime_resume_and_get(ctx->cal->dev); if (ret < 0) goto error_pipeline; cal_ctx_set_dma_addr(ctx, addr); cal_ctx_start(ctx); ret = v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 1); if (ret) goto error_stop; if (cal_debug >= 4) cal_quickdump_regs(ctx->cal); return 0; error_stop: cal_ctx_stop(ctx); pm_runtime_put_sync(ctx->cal->dev); cal_ctx_unprepare(ctx); error_pipeline: media_pipeline_stop(&ctx->vdev.entity); error_release_buffers: cal_release_buffers(ctx, VB2_BUF_STATE_QUEUED); return ret; } static void cal_stop_streaming(struct vb2_queue *vq) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); cal_ctx_stop(ctx); v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 0); pm_runtime_put_sync(ctx->cal->dev); cal_ctx_unprepare(ctx); cal_release_buffers(ctx, VB2_BUF_STATE_ERROR); media_pipeline_stop(&ctx->vdev.entity); } 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 v4l2_file_operations cal_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, .release = vb2_fop_release, .poll = vb2_fop_poll, .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ .mmap = vb2_fop_mmap, }; 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_format_info *fmtinfo; 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, cal_num_formats, sizeof(*ctx->active_fmt), GFP_KERNEL); if (!ctx->active_fmt) return -ENOMEM; ctx->num_active_fmt = 0; for (j = 0, i = 0; ; ++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->source, pad, enum_mbus_code, NULL, &mbus_code); if (ret == -EINVAL) break; if (ret) { ctx_err(ctx, "Error enumerating mbus codes in subdev %s: %d\n", ctx->phy->source->name, ret); return ret; } ctx_dbg(2, ctx, "subdev %s: code: %04x idx: %u\n", ctx->phy->source->name, mbus_code.code, j); for (k = 0; k < cal_num_formats; k++) { fmtinfo = &cal_formats[k]; if (mbus_code.code == fmtinfo->code) { ctx->active_fmt[i] = fmtinfo; ctx_dbg(2, ctx, "matched fourcc: %s: code: %04x idx: %u\n", fourcc_to_str(fmtinfo->fourcc), fmtinfo->code, i); ctx->num_active_fmt = ++i; } } } if (i == 0) { ctx_err(ctx, "No suitable format reported by subdev %s\n", ctx->phy->source->name); return -EINVAL; } ret = __subdev_get_format(ctx, &mbus_fmt); if (ret) return ret; fmtinfo = find_format_by_code(ctx, mbus_fmt.code); if (!fmtinfo) { ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n", mbus_fmt.code); return -EINVAL; } /* Save current 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 = fmtinfo->fourcc; cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); ctx->fmtinfo = fmtinfo; return 0; } static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx) { const struct cal_format_info *fmtinfo; struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix; fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_2X8); if (!fmtinfo) return -EINVAL; pix_fmt->width = 640; pix_fmt->height = 480; pix_fmt->field = V4L2_FIELD_NONE; pix_fmt->colorspace = V4L2_COLORSPACE_SRGB; pix_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601; pix_fmt->quantization = V4L2_QUANTIZATION_LIM_RANGE; pix_fmt->xfer_func = V4L2_XFER_FUNC_SRGB; pix_fmt->pixelformat = fmtinfo->fourcc; ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; /* Save current format */ cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); ctx->fmtinfo = fmtinfo; return 0; } int cal_ctx_v4l2_register(struct cal_ctx *ctx) { struct video_device *vfd = &ctx->vdev; int ret; if (!cal_mc_api) { struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; ret = cal_ctx_v4l2_init_formats(ctx); if (ret) { ctx_err(ctx, "Failed to init formats: %d\n", ret); return ret; } ret = v4l2_ctrl_add_handler(hdl, ctx->phy->source->ctrl_handler, NULL, true); if (ret < 0) { ctx_err(ctx, "Failed to add source ctrl handler\n"); return ret; } } else { ret = cal_ctx_v4l2_init_mc_format(ctx); if (ret) { ctx_err(ctx, "Failed to init format: %d\n", ret); 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; } ret = media_create_pad_link(&ctx->phy->subdev.entity, CAL_CAMERARX_PAD_FIRST_SOURCE, &vfd->entity, 0, MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); if (ret) { ctx_err(ctx, "Failed to create media link for context %u\n", ctx->dma_ctx); video_unregister_device(vfd); 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 video_device *vfd = &ctx->vdev; struct vb2_queue *q = &ctx->vb_vidq; int ret; INIT_LIST_HEAD(&ctx->dma.queue); spin_lock_init(&ctx->dma.lock); mutex_init(&ctx->mutex); init_waitqueue_head(&ctx->dma.wait); /* Initialize the vb2 queue. */ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; q->io_modes = VB2_MMAP | VB2_DMABUF; 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->fops = &cal_fops; vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | (cal_mc_api ? V4L2_CAP_IO_MC : 0); vfd->v4l2_dev = &ctx->cal->v4l2_dev; vfd->queue = q; snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->dma_ctx); vfd->release = video_device_release_empty; vfd->ioctl_ops = cal_mc_api ? &cal_ioctl_mc_ops : &cal_ioctl_legacy_ops; 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; if (!cal_mc_api) { /* Initialize the control handler. */ struct v4l2_ctrl_handler *hdl = &ctx->ctrl_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) { if (!cal_mc_api) v4l2_ctrl_handler_free(&ctx->ctrl_handler); media_entity_cleanup(&ctx->vdev.entity); }