1/* 2 * vivid-vbi-out.c - vbi output support functions. 3 * 4 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. 5 * 6 * This program is free software; you may redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; version 2 of the License. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 11 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 12 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 13 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 14 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 15 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 16 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 17 * SOFTWARE. 18 */ 19 20#include <linux/errno.h> 21#include <linux/kernel.h> 22#include <linux/videodev2.h> 23#include <media/v4l2-common.h> 24 25#include "vivid-core.h" 26#include "vivid-kthread-out.h" 27#include "vivid-vbi-out.h" 28#include "vivid-vbi-cap.h" 29 30static int vbi_out_queue_setup(struct vb2_queue *vq, const void *parg, 31 unsigned *nbuffers, unsigned *nplanes, 32 unsigned sizes[], void *alloc_ctxs[]) 33{ 34 struct vivid_dev *dev = vb2_get_drv_priv(vq); 35 bool is_60hz = dev->std_out & V4L2_STD_525_60; 36 unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? 37 36 * sizeof(struct v4l2_sliced_vbi_data) : 38 1440 * 2 * (is_60hz ? 12 : 18); 39 40 if (!vivid_is_svid_out(dev)) 41 return -EINVAL; 42 43 sizes[0] = size; 44 45 if (vq->num_buffers + *nbuffers < 2) 46 *nbuffers = 2 - vq->num_buffers; 47 48 *nplanes = 1; 49 return 0; 50} 51 52static int vbi_out_buf_prepare(struct vb2_buffer *vb) 53{ 54 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 55 bool is_60hz = dev->std_out & V4L2_STD_525_60; 56 unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? 57 36 * sizeof(struct v4l2_sliced_vbi_data) : 58 1440 * 2 * (is_60hz ? 12 : 18); 59 60 dprintk(dev, 1, "%s\n", __func__); 61 62 if (dev->buf_prepare_error) { 63 /* 64 * Error injection: test what happens if buf_prepare() returns 65 * an error. 66 */ 67 dev->buf_prepare_error = false; 68 return -EINVAL; 69 } 70 if (vb2_plane_size(vb, 0) < size) { 71 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", 72 __func__, vb2_plane_size(vb, 0), size); 73 return -EINVAL; 74 } 75 vb2_set_plane_payload(vb, 0, size); 76 77 return 0; 78} 79 80static void vbi_out_buf_queue(struct vb2_buffer *vb) 81{ 82 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 83 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 84 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); 85 86 dprintk(dev, 1, "%s\n", __func__); 87 88 spin_lock(&dev->slock); 89 list_add_tail(&buf->list, &dev->vbi_out_active); 90 spin_unlock(&dev->slock); 91} 92 93static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count) 94{ 95 struct vivid_dev *dev = vb2_get_drv_priv(vq); 96 int err; 97 98 dprintk(dev, 1, "%s\n", __func__); 99 dev->vbi_out_seq_count = 0; 100 if (dev->start_streaming_error) { 101 dev->start_streaming_error = false; 102 err = -EINVAL; 103 } else { 104 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming); 105 } 106 if (err) { 107 struct vivid_buffer *buf, *tmp; 108 109 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) { 110 list_del(&buf->list); 111 vb2_buffer_done(&buf->vb.vb2_buf, 112 VB2_BUF_STATE_QUEUED); 113 } 114 } 115 return err; 116} 117 118/* abort streaming and wait for last buffer */ 119static void vbi_out_stop_streaming(struct vb2_queue *vq) 120{ 121 struct vivid_dev *dev = vb2_get_drv_priv(vq); 122 123 dprintk(dev, 1, "%s\n", __func__); 124 vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming); 125 dev->vbi_out_have_wss = false; 126 dev->vbi_out_have_cc[0] = false; 127 dev->vbi_out_have_cc[1] = false; 128} 129 130const struct vb2_ops vivid_vbi_out_qops = { 131 .queue_setup = vbi_out_queue_setup, 132 .buf_prepare = vbi_out_buf_prepare, 133 .buf_queue = vbi_out_buf_queue, 134 .start_streaming = vbi_out_start_streaming, 135 .stop_streaming = vbi_out_stop_streaming, 136 .wait_prepare = vb2_ops_wait_prepare, 137 .wait_finish = vb2_ops_wait_finish, 138}; 139 140int vidioc_g_fmt_vbi_out(struct file *file, void *priv, 141 struct v4l2_format *f) 142{ 143 struct vivid_dev *dev = video_drvdata(file); 144 struct v4l2_vbi_format *vbi = &f->fmt.vbi; 145 bool is_60hz = dev->std_out & V4L2_STD_525_60; 146 147 if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out) 148 return -EINVAL; 149 150 vbi->sampling_rate = 25000000; 151 vbi->offset = 24; 152 vbi->samples_per_line = 1440; 153 vbi->sample_format = V4L2_PIX_FMT_GREY; 154 vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5; 155 vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5; 156 vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18; 157 vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0; 158 vbi->reserved[0] = 0; 159 vbi->reserved[1] = 0; 160 return 0; 161} 162 163int vidioc_s_fmt_vbi_out(struct file *file, void *priv, 164 struct v4l2_format *f) 165{ 166 struct vivid_dev *dev = video_drvdata(file); 167 int ret = vidioc_g_fmt_vbi_out(file, priv, f); 168 169 if (ret) 170 return ret; 171 if (vb2_is_busy(&dev->vb_vbi_out_q)) 172 return -EBUSY; 173 dev->stream_sliced_vbi_out = false; 174 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT; 175 return 0; 176} 177 178int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) 179{ 180 struct vivid_dev *dev = video_drvdata(file); 181 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 182 183 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) 184 return -EINVAL; 185 186 vivid_fill_service_lines(vbi, dev->service_set_out); 187 return 0; 188} 189 190int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) 191{ 192 struct vivid_dev *dev = video_drvdata(file); 193 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 194 bool is_60hz = dev->std_out & V4L2_STD_525_60; 195 u32 service_set = vbi->service_set; 196 197 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) 198 return -EINVAL; 199 200 service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 : 201 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B; 202 vivid_fill_service_lines(vbi, service_set); 203 return 0; 204} 205 206int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, 207 struct v4l2_format *fmt) 208{ 209 struct vivid_dev *dev = video_drvdata(file); 210 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 211 int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt); 212 213 if (ret) 214 return ret; 215 if (vb2_is_busy(&dev->vb_vbi_out_q)) 216 return -EBUSY; 217 dev->service_set_out = vbi->service_set; 218 dev->stream_sliced_vbi_out = true; 219 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT; 220 return 0; 221} 222 223void vivid_sliced_vbi_out_process(struct vivid_dev *dev, 224 struct vivid_buffer *buf) 225{ 226 struct v4l2_sliced_vbi_data *vbi = 227 vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 228 unsigned elems = 229 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi); 230 231 dev->vbi_out_have_cc[0] = false; 232 dev->vbi_out_have_cc[1] = false; 233 dev->vbi_out_have_wss = false; 234 while (elems--) { 235 switch (vbi->id) { 236 case V4L2_SLICED_CAPTION_525: 237 if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) { 238 dev->vbi_out_have_cc[!!vbi->field] = true; 239 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0]; 240 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1]; 241 } 242 break; 243 case V4L2_SLICED_WSS_625: 244 if ((dev->std_out & V4L2_STD_625_50) && 245 vbi->field == 0 && vbi->line == 23) { 246 dev->vbi_out_have_wss = true; 247 dev->vbi_out_wss[0] = vbi->data[0]; 248 dev->vbi_out_wss[1] = vbi->data[1]; 249 } 250 break; 251 } 252 vbi++; 253 } 254} 255