250 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * vivid-vbi-out.c - vbi output support functions.4 *5 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.6 */7 8#include <linux/errno.h>9#include <linux/kernel.h>10#include <linux/videodev2.h>11#include <media/v4l2-common.h>12 13#include "vivid-core.h"14#include "vivid-kthread-out.h"15#include "vivid-vbi-out.h"16#include "vivid-vbi-cap.h"17 18static int vbi_out_queue_setup(struct vb2_queue *vq,19 unsigned *nbuffers, unsigned *nplanes,20 unsigned sizes[], struct device *alloc_devs[])21{22 struct vivid_dev *dev = vb2_get_drv_priv(vq);23 bool is_60hz = dev->std_out & V4L2_STD_525_60;24 unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?25 36 * sizeof(struct v4l2_sliced_vbi_data) :26 1440 * 2 * (is_60hz ? 12 : 18);27 28 if (!vivid_is_svid_out(dev))29 return -EINVAL;30 31 if (*nplanes)32 return sizes[0] < size ? -EINVAL : 0;33 sizes[0] = size;34 35 *nplanes = 1;36 return 0;37}38 39static int vbi_out_buf_prepare(struct vb2_buffer *vb)40{41 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);42 bool is_60hz = dev->std_out & V4L2_STD_525_60;43 unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?44 36 * sizeof(struct v4l2_sliced_vbi_data) :45 1440 * 2 * (is_60hz ? 12 : 18);46 47 dprintk(dev, 1, "%s\n", __func__);48 49 if (dev->buf_prepare_error) {50 /*51 * Error injection: test what happens if buf_prepare() returns52 * an error.53 */54 dev->buf_prepare_error = false;55 return -EINVAL;56 }57 if (vb2_plane_size(vb, 0) < size) {58 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",59 __func__, vb2_plane_size(vb, 0), size);60 return -EINVAL;61 }62 vb2_set_plane_payload(vb, 0, size);63 64 return 0;65}66 67static void vbi_out_buf_queue(struct vb2_buffer *vb)68{69 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);70 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);71 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);72 73 dprintk(dev, 1, "%s\n", __func__);74 75 spin_lock(&dev->slock);76 list_add_tail(&buf->list, &dev->vbi_out_active);77 spin_unlock(&dev->slock);78}79 80static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)81{82 struct vivid_dev *dev = vb2_get_drv_priv(vq);83 int err;84 85 dprintk(dev, 1, "%s\n", __func__);86 dev->vbi_out_seq_count = 0;87 if (dev->start_streaming_error) {88 dev->start_streaming_error = false;89 err = -EINVAL;90 } else {91 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);92 }93 if (err) {94 struct vivid_buffer *buf, *tmp;95 96 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {97 list_del(&buf->list);98 vb2_buffer_done(&buf->vb.vb2_buf,99 VB2_BUF_STATE_QUEUED);100 }101 }102 return err;103}104 105/* abort streaming and wait for last buffer */106static void vbi_out_stop_streaming(struct vb2_queue *vq)107{108 struct vivid_dev *dev = vb2_get_drv_priv(vq);109 110 dprintk(dev, 1, "%s\n", __func__);111 vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);112 dev->vbi_out_have_wss = false;113 dev->vbi_out_have_cc[0] = false;114 dev->vbi_out_have_cc[1] = false;115}116 117static void vbi_out_buf_request_complete(struct vb2_buffer *vb)118{119 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);120 121 v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vbi_out);122}123 124const struct vb2_ops vivid_vbi_out_qops = {125 .queue_setup = vbi_out_queue_setup,126 .buf_prepare = vbi_out_buf_prepare,127 .buf_queue = vbi_out_buf_queue,128 .start_streaming = vbi_out_start_streaming,129 .stop_streaming = vbi_out_stop_streaming,130 .buf_request_complete = vbi_out_buf_request_complete,131 .wait_prepare = vb2_ops_wait_prepare,132 .wait_finish = vb2_ops_wait_finish,133};134 135int vidioc_g_fmt_vbi_out(struct file *file, void *priv,136 struct v4l2_format *f)137{138 struct vivid_dev *dev = video_drvdata(file);139 struct v4l2_vbi_format *vbi = &f->fmt.vbi;140 bool is_60hz = dev->std_out & V4L2_STD_525_60;141 142 if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)143 return -EINVAL;144 145 vbi->sampling_rate = 25000000;146 vbi->offset = 24;147 vbi->samples_per_line = 1440;148 vbi->sample_format = V4L2_PIX_FMT_GREY;149 vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;150 vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;151 vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;152 vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;153 vbi->reserved[0] = 0;154 vbi->reserved[1] = 0;155 return 0;156}157 158int vidioc_s_fmt_vbi_out(struct file *file, void *priv,159 struct v4l2_format *f)160{161 struct vivid_dev *dev = video_drvdata(file);162 int ret = vidioc_g_fmt_vbi_out(file, priv, f);163 164 if (ret)165 return ret;166 if (vb2_is_busy(&dev->vb_vbi_out_q))167 return -EBUSY;168 dev->stream_sliced_vbi_out = false;169 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;170 return 0;171}172 173int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)174{175 struct vivid_dev *dev = video_drvdata(file);176 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;177 178 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)179 return -EINVAL;180 181 vivid_fill_service_lines(vbi, dev->service_set_out);182 return 0;183}184 185int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)186{187 struct vivid_dev *dev = video_drvdata(file);188 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;189 bool is_60hz = dev->std_out & V4L2_STD_525_60;190 u32 service_set = vbi->service_set;191 192 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)193 return -EINVAL;194 195 service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :196 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;197 vivid_fill_service_lines(vbi, service_set);198 return 0;199}200 201int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,202 struct v4l2_format *fmt)203{204 struct vivid_dev *dev = video_drvdata(file);205 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;206 int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);207 208 if (ret)209 return ret;210 if (vb2_is_busy(&dev->vb_vbi_out_q))211 return -EBUSY;212 dev->service_set_out = vbi->service_set;213 dev->stream_sliced_vbi_out = true;214 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;215 return 0;216}217 218void vivid_sliced_vbi_out_process(struct vivid_dev *dev,219 struct vivid_buffer *buf)220{221 struct v4l2_sliced_vbi_data *vbi =222 vb2_plane_vaddr(&buf->vb.vb2_buf, 0);223 unsigned elems =224 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);225 226 dev->vbi_out_have_cc[0] = false;227 dev->vbi_out_have_cc[1] = false;228 dev->vbi_out_have_wss = false;229 while (elems--) {230 switch (vbi->id) {231 case V4L2_SLICED_CAPTION_525:232 if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {233 dev->vbi_out_have_cc[!!vbi->field] = true;234 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];235 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];236 }237 break;238 case V4L2_SLICED_WSS_625:239 if ((dev->std_out & V4L2_STD_625_50) &&240 vbi->field == 0 && vbi->line == 23) {241 dev->vbi_out_have_wss = true;242 dev->vbi_out_wss[0] = vbi->data[0];243 dev->vbi_out_wss[1] = vbi->data[1];244 }245 break;246 }247 vbi++;248 }249}250