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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 au0828-vbi.c - VBI driver for au08284 5 Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>6 7 This work was sponsored by GetWellNetwork Inc.8 9 */10 11#include "au0828.h"12 13#include <linux/kernel.h>14#include <linux/module.h>15#include <linux/init.h>16#include <linux/slab.h>17#include <media/v4l2-mc.h>18 19/* ------------------------------------------------------------------ */20 21static int vbi_queue_setup(struct vb2_queue *vq,22 unsigned int *nbuffers, unsigned int *nplanes,23 unsigned int sizes[], struct device *alloc_devs[])24{25 struct au0828_dev *dev = vb2_get_drv_priv(vq);26 unsigned long size = dev->vbi_width * dev->vbi_height * 2;27 28 if (*nplanes)29 return sizes[0] < size ? -EINVAL : 0;30 *nplanes = 1;31 sizes[0] = size;32 return 0;33}34 35static int vbi_buffer_prepare(struct vb2_buffer *vb)36{37 struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);38 unsigned long size;39 40 size = dev->vbi_width * dev->vbi_height * 2;41 42 if (vb2_plane_size(vb, 0) < size) {43 pr_err("%s data will not fit into plane (%lu < %lu)\n",44 __func__, vb2_plane_size(vb, 0), size);45 return -EINVAL;46 }47 vb2_set_plane_payload(vb, 0, size);48 49 return 0;50}51 52static void53vbi_buffer_queue(struct vb2_buffer *vb)54{55 struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);56 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);57 struct au0828_buffer *buf =58 container_of(vbuf, struct au0828_buffer, vb);59 struct au0828_dmaqueue *vbiq = &dev->vbiq;60 unsigned long flags = 0;61 62 buf->mem = vb2_plane_vaddr(vb, 0);63 buf->length = vb2_plane_size(vb, 0);64 65 spin_lock_irqsave(&dev->slock, flags);66 list_add_tail(&buf->list, &vbiq->active);67 spin_unlock_irqrestore(&dev->slock, flags);68}69 70const struct vb2_ops au0828_vbi_qops = {71 .queue_setup = vbi_queue_setup,72 .buf_prepare = vbi_buffer_prepare,73 .buf_queue = vbi_buffer_queue,74 .prepare_streaming = v4l_vb2q_enable_media_source,75 .start_streaming = au0828_start_analog_streaming,76 .stop_streaming = au0828_stop_vbi_streaming,77 .wait_prepare = vb2_ops_wait_prepare,78 .wait_finish = vb2_ops_wait_finish,79};80