2 au0828-vbi.c - VBI driver for au0828
4 Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
6 This work was sponsored by GetWellNetwork Inc.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
31 /* ------------------------------------------------------------------ */
33 static int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
34 unsigned int *nbuffers, unsigned int *nplanes,
35 unsigned int sizes[], void *alloc_ctxs[])
37 struct au0828_dev *dev = vb2_get_drv_priv(vq);
38 unsigned long img_size = dev->vbi_width * dev->vbi_height * 2;
41 size = fmt ? (fmt->fmt.vbi.samples_per_line *
42 (fmt->fmt.vbi.count[0] + fmt->fmt.vbi.count[1])) : img_size;
52 static int vbi_buffer_prepare(struct vb2_buffer *vb)
54 struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
55 struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
58 size = dev->vbi_width * dev->vbi_height * 2;
60 if (vb2_plane_size(vb, 0) < size) {
61 pr_err("%s data will not fit into plane (%lu < %lu)\n",
62 __func__, vb2_plane_size(vb, 0), size);
65 vb2_set_plane_payload(&buf->vb, 0, size);
71 vbi_buffer_queue(struct vb2_buffer *vb)
73 struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
74 struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
75 struct au0828_dmaqueue *vbiq = &dev->vbiq;
76 unsigned long flags = 0;
78 buf->mem = vb2_plane_vaddr(vb, 0);
79 buf->length = vb2_plane_size(vb, 0);
81 spin_lock_irqsave(&dev->slock, flags);
82 list_add_tail(&buf->list, &vbiq->active);
83 spin_unlock_irqrestore(&dev->slock, flags);
86 struct vb2_ops au0828_vbi_qops = {
87 .queue_setup = vbi_queue_setup,
88 .buf_prepare = vbi_buffer_prepare,
89 .buf_queue = vbi_buffer_queue,
90 .start_streaming = au0828_start_analog_streaming,
91 .stop_streaming = au0828_stop_vbi_streaming,
92 .wait_prepare = vb2_ops_wait_prepare,
93 .wait_finish = vb2_ops_wait_finish,