1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun au0828-vbi.c - VBI driver for au0828
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun This work was sponsored by GetWellNetwork Inc.
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "au0828.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/kernel.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/init.h>
16*4882a593Smuzhiyun #include <linux/slab.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun /* ------------------------------------------------------------------ */
19*4882a593Smuzhiyun
vbi_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])20*4882a593Smuzhiyun static int vbi_queue_setup(struct vb2_queue *vq,
21*4882a593Smuzhiyun unsigned int *nbuffers, unsigned int *nplanes,
22*4882a593Smuzhiyun unsigned int sizes[], struct device *alloc_devs[])
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct au0828_dev *dev = vb2_get_drv_priv(vq);
25*4882a593Smuzhiyun unsigned long size = dev->vbi_width * dev->vbi_height * 2;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (*nplanes)
28*4882a593Smuzhiyun return sizes[0] < size ? -EINVAL : 0;
29*4882a593Smuzhiyun *nplanes = 1;
30*4882a593Smuzhiyun sizes[0] = size;
31*4882a593Smuzhiyun return 0;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
vbi_buffer_prepare(struct vb2_buffer * vb)34*4882a593Smuzhiyun static int vbi_buffer_prepare(struct vb2_buffer *vb)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
37*4882a593Smuzhiyun unsigned long size;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun size = dev->vbi_width * dev->vbi_height * 2;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (vb2_plane_size(vb, 0) < size) {
42*4882a593Smuzhiyun pr_err("%s data will not fit into plane (%lu < %lu)\n",
43*4882a593Smuzhiyun __func__, vb2_plane_size(vb, 0), size);
44*4882a593Smuzhiyun return -EINVAL;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun vb2_set_plane_payload(vb, 0, size);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun static void
vbi_buffer_queue(struct vb2_buffer * vb)52*4882a593Smuzhiyun vbi_buffer_queue(struct vb2_buffer *vb)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
55*4882a593Smuzhiyun struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
56*4882a593Smuzhiyun struct au0828_buffer *buf =
57*4882a593Smuzhiyun container_of(vbuf, struct au0828_buffer, vb);
58*4882a593Smuzhiyun struct au0828_dmaqueue *vbiq = &dev->vbiq;
59*4882a593Smuzhiyun unsigned long flags = 0;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun buf->mem = vb2_plane_vaddr(vb, 0);
62*4882a593Smuzhiyun buf->length = vb2_plane_size(vb, 0);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun spin_lock_irqsave(&dev->slock, flags);
65*4882a593Smuzhiyun list_add_tail(&buf->list, &vbiq->active);
66*4882a593Smuzhiyun spin_unlock_irqrestore(&dev->slock, flags);
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun const struct vb2_ops au0828_vbi_qops = {
70*4882a593Smuzhiyun .queue_setup = vbi_queue_setup,
71*4882a593Smuzhiyun .buf_prepare = vbi_buffer_prepare,
72*4882a593Smuzhiyun .buf_queue = vbi_buffer_queue,
73*4882a593Smuzhiyun .start_streaming = au0828_start_analog_streaming,
74*4882a593Smuzhiyun .stop_streaming = au0828_stop_vbi_streaming,
75*4882a593Smuzhiyun .wait_prepare = vb2_ops_wait_prepare,
76*4882a593Smuzhiyun .wait_finish = vb2_ops_wait_finish,
77*4882a593Smuzhiyun };
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