Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Devin Heitmueller |
322 |
78.73% |
3 |
21.43% |
| Hans Verkuil |
26 |
6.36% |
2 |
14.29% |
| Mauro Carvalho Chehab |
26 |
6.36% |
5 |
35.71% |
| Frank Schäfer |
21 |
5.13% |
1 |
7.14% |
| Junghak Sung |
11 |
2.69% |
1 |
7.14% |
| Randy Dunlap |
2 |
0.49% |
1 |
7.14% |
| Bhumika Goyal |
1 |
0.24% |
1 |
7.14% |
| Total |
409 |
|
14 |
|
// SPDX-License-Identifier: GPL-2.0+
//
// em28xx-vbi.c - VBI driver for em28xx
//
// Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
//
// This work was sponsored by EyeMagnet Limited.
#include "em28xx.h"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/hardirq.h>
#include <linux/init.h>
#include <linux/usb.h>
#include "em28xx-v4l.h"
/* ------------------------------------------------------------------ */
static int vbi_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct em28xx *dev = vb2_get_drv_priv(vq);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
unsigned long size = v4l2->vbi_width * v4l2->vbi_height * 2;
if (*nbuffers < 2)
*nbuffers = 2;
if (*nplanes) {
if (sizes[0] < size)
return -EINVAL;
size = sizes[0];
}
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int vbi_buffer_prepare(struct vb2_buffer *vb)
{
struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
struct em28xx_v4l2 *v4l2 = dev->v4l2;
unsigned long size;
size = v4l2->vbi_width * v4l2->vbi_height * 2;
if (vb2_plane_size(vb, 0) < size) {
dev_info(&dev->intf->dev,
"%s data will not fit into plane (%lu < %lu)\n",
__func__, vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static void
vbi_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
struct em28xx_buffer *buf =
container_of(vbuf, struct em28xx_buffer, vb);
struct em28xx_dmaqueue *vbiq = &dev->vbiq;
unsigned long flags = 0;
buf->mem = vb2_plane_vaddr(vb, 0);
buf->length = vb2_plane_size(vb, 0);
spin_lock_irqsave(&dev->slock, flags);
list_add_tail(&buf->list, &vbiq->active);
spin_unlock_irqrestore(&dev->slock, flags);
}
const struct vb2_ops em28xx_vbi_qops = {
.queue_setup = vbi_queue_setup,
.buf_prepare = vbi_buffer_prepare,
.buf_queue = vbi_buffer_queue,
.start_streaming = em28xx_start_analog_streaming,
.stop_streaming = em28xx_stop_vbi_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};