80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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au0828-vbi.c - VBI driver for au0828
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Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
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This work was sponsored by GetWellNetwork Inc.
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*/
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#include "au0828.h"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <media/v4l2-mc.h>
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/* ------------------------------------------------------------------ */
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static int vbi_queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct au0828_dev *dev = vb2_get_drv_priv(vq);
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unsigned long size = dev->vbi_width * dev->vbi_height * 2;
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if (*nplanes)
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return sizes[0] < size ? -EINVAL : 0;
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*nplanes = 1;
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sizes[0] = size;
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return 0;
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}
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static int vbi_buffer_prepare(struct vb2_buffer *vb)
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{
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struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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unsigned long size;
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size = dev->vbi_width * dev->vbi_height * 2;
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if (vb2_plane_size(vb, 0) < size) {
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pr_err("%s data will not fit into plane (%lu < %lu)\n",
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__func__, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void
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vbi_buffer_queue(struct vb2_buffer *vb)
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{
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struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct au0828_buffer *buf =
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container_of(vbuf, struct au0828_buffer, vb);
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struct au0828_dmaqueue *vbiq = &dev->vbiq;
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unsigned long flags = 0;
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buf->mem = vb2_plane_vaddr(vb, 0);
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buf->length = vb2_plane_size(vb, 0);
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spin_lock_irqsave(&dev->slock, flags);
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list_add_tail(&buf->list, &vbiq->active);
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spin_unlock_irqrestore(&dev->slock, flags);
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}
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const struct vb2_ops au0828_vbi_qops = {
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.queue_setup = vbi_queue_setup,
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.buf_prepare = vbi_buffer_prepare,
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.buf_queue = vbi_buffer_queue,
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.prepare_streaming = v4l_vb2q_enable_media_source,
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.start_streaming = au0828_start_analog_streaming,
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.stop_streaming = au0828_stop_vbi_streaming,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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