diff options
Diffstat (limited to 'drivers/media/platform/vivid/vivid-vbi-out.c')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-vbi-out.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/drivers/media/platform/vivid/vivid-vbi-out.c b/drivers/media/platform/vivid/vivid-vbi-out.c new file mode 100644 index 000000000..69486c130 --- /dev/null +++ b/drivers/media/platform/vivid/vivid-vbi-out.c @@ -0,0 +1,242 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * vivid-vbi-out.c - vbi output support functions. + * + * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. + */ + +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> + +#include "vivid-core.h" +#include "vivid-kthread-out.h" +#include "vivid-vbi-out.h" +#include "vivid-vbi-cap.h" + +static int vbi_out_queue_setup(struct vb2_queue *vq, + unsigned *nbuffers, unsigned *nplanes, + unsigned sizes[], struct device *alloc_devs[]) +{ + struct vivid_dev *dev = vb2_get_drv_priv(vq); + bool is_60hz = dev->std_out & V4L2_STD_525_60; + unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? + 36 * sizeof(struct v4l2_sliced_vbi_data) : + 1440 * 2 * (is_60hz ? 12 : 18); + + if (!vivid_is_svid_out(dev)) + return -EINVAL; + + sizes[0] = size; + + if (vq->num_buffers + *nbuffers < 2) + *nbuffers = 2 - vq->num_buffers; + + *nplanes = 1; + return 0; +} + +static int vbi_out_buf_prepare(struct vb2_buffer *vb) +{ + struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); + bool is_60hz = dev->std_out & V4L2_STD_525_60; + unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? + 36 * sizeof(struct v4l2_sliced_vbi_data) : + 1440 * 2 * (is_60hz ? 12 : 18); + + dprintk(dev, 1, "%s\n", __func__); + + if (dev->buf_prepare_error) { + /* + * Error injection: test what happens if buf_prepare() returns + * an error. + */ + dev->buf_prepare_error = false; + return -EINVAL; + } + if (vb2_plane_size(vb, 0) < size) { + dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", + __func__, vb2_plane_size(vb, 0), size); + return -EINVAL; + } + vb2_set_plane_payload(vb, 0, size); + + return 0; +} + +static void vbi_out_buf_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); + struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); + + dprintk(dev, 1, "%s\n", __func__); + + spin_lock(&dev->slock); + list_add_tail(&buf->list, &dev->vbi_out_active); + spin_unlock(&dev->slock); +} + +static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count) +{ + struct vivid_dev *dev = vb2_get_drv_priv(vq); + int err; + + dprintk(dev, 1, "%s\n", __func__); + dev->vbi_out_seq_count = 0; + if (dev->start_streaming_error) { + dev->start_streaming_error = false; + err = -EINVAL; + } else { + err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming); + } + if (err) { + struct vivid_buffer *buf, *tmp; + + list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, + VB2_BUF_STATE_QUEUED); + } + } + return err; +} + +/* abort streaming and wait for last buffer */ +static void vbi_out_stop_streaming(struct vb2_queue *vq) +{ + struct vivid_dev *dev = vb2_get_drv_priv(vq); + + dprintk(dev, 1, "%s\n", __func__); + vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming); + dev->vbi_out_have_wss = false; + dev->vbi_out_have_cc[0] = false; + dev->vbi_out_have_cc[1] = false; +} + +const struct vb2_ops vivid_vbi_out_qops = { + .queue_setup = vbi_out_queue_setup, + .buf_prepare = vbi_out_buf_prepare, + .buf_queue = vbi_out_buf_queue, + .start_streaming = vbi_out_start_streaming, + .stop_streaming = vbi_out_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +int vidioc_g_fmt_vbi_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct vivid_dev *dev = video_drvdata(file); + struct v4l2_vbi_format *vbi = &f->fmt.vbi; + bool is_60hz = dev->std_out & V4L2_STD_525_60; + + if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out) + return -EINVAL; + + vbi->sampling_rate = 25000000; + vbi->offset = 24; + vbi->samples_per_line = 1440; + vbi->sample_format = V4L2_PIX_FMT_GREY; + vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5; + vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5; + vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18; + vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0; + vbi->reserved[0] = 0; + vbi->reserved[1] = 0; + return 0; +} + +int vidioc_s_fmt_vbi_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct vivid_dev *dev = video_drvdata(file); + int ret = vidioc_g_fmt_vbi_out(file, priv, f); + + if (ret) + return ret; + if (vb2_is_busy(&dev->vb_vbi_out_q)) + return -EBUSY; + dev->stream_sliced_vbi_out = false; + dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT; + return 0; +} + +int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) +{ + struct vivid_dev *dev = video_drvdata(file); + struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; + + if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) + return -EINVAL; + + vivid_fill_service_lines(vbi, dev->service_set_out); + return 0; +} + +int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) +{ + struct vivid_dev *dev = video_drvdata(file); + struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; + bool is_60hz = dev->std_out & V4L2_STD_525_60; + u32 service_set = vbi->service_set; + + if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) + return -EINVAL; + + service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 : + V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B; + vivid_fill_service_lines(vbi, service_set); + return 0; +} + +int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, + struct v4l2_format *fmt) +{ + struct vivid_dev *dev = video_drvdata(file); + struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; + int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt); + + if (ret) + return ret; + if (vb2_is_busy(&dev->vb_vbi_out_q)) + return -EBUSY; + dev->service_set_out = vbi->service_set; + dev->stream_sliced_vbi_out = true; + dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT; + return 0; +} + +void vivid_sliced_vbi_out_process(struct vivid_dev *dev, + struct vivid_buffer *buf) +{ + struct v4l2_sliced_vbi_data *vbi = + vb2_plane_vaddr(&buf->vb.vb2_buf, 0); + unsigned elems = + vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi); + + dev->vbi_out_have_cc[0] = false; + dev->vbi_out_have_cc[1] = false; + dev->vbi_out_have_wss = false; + while (elems--) { + switch (vbi->id) { + case V4L2_SLICED_CAPTION_525: + if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) { + dev->vbi_out_have_cc[!!vbi->field] = true; + dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0]; + dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1]; + } + break; + case V4L2_SLICED_WSS_625: + if ((dev->std_out & V4L2_STD_625_50) && + vbi->field == 0 && vbi->line == 23) { + dev->vbi_out_have_wss = true; + dev->vbi_out_wss[0] = vbi->data[0]; + dev->vbi_out_wss[1] = vbi->data[1]; + } + break; + } + vbi++; + } +} |