1// SPDX-License-Identifier: GPL-2.0-only 2/* 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 sizes[0] = size; 32 33 if (vq->num_buffers + *nbuffers < 2) 34 *nbuffers = 2 - vq->num_buffers; 35 36 *nplanes = 1; 37 return 0; 38} 39 40static int vbi_out_buf_prepare(struct vb2_buffer *vb) 41{ 42 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 43 bool is_60hz = dev->std_out & V4L2_STD_525_60; 44 unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ? 45 36 * sizeof(struct v4l2_sliced_vbi_data) : 46 1440 * 2 * (is_60hz ? 12 : 18); 47 48 dprintk(dev, 1, "%s\n", __func__); 49 50 if (dev->buf_prepare_error) { 51 /* 52 * Error injection: test what happens if buf_prepare() returns 53 * an error. 54 */ 55 dev->buf_prepare_error = false; 56 return -EINVAL; 57 } 58 if (vb2_plane_size(vb, 0) < size) { 59 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", 60 __func__, vb2_plane_size(vb, 0), size); 61 return -EINVAL; 62 } 63 vb2_set_plane_payload(vb, 0, size); 64 65 return 0; 66} 67 68static void vbi_out_buf_queue(struct vb2_buffer *vb) 69{ 70 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 71 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 72 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); 73 74 dprintk(dev, 1, "%s\n", __func__); 75 76 spin_lock(&dev->slock); 77 list_add_tail(&buf->list, &dev->vbi_out_active); 78 spin_unlock(&dev->slock); 79} 80 81static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count) 82{ 83 struct vivid_dev *dev = vb2_get_drv_priv(vq); 84 int err; 85 86 dprintk(dev, 1, "%s\n", __func__); 87 dev->vbi_out_seq_count = 0; 88 if (dev->start_streaming_error) { 89 dev->start_streaming_error = false; 90 err = -EINVAL; 91 } else { 92 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming); 93 } 94 if (err) { 95 struct vivid_buffer *buf, *tmp; 96 97 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) { 98 list_del(&buf->list); 99 vb2_buffer_done(&buf->vb.vb2_buf, 100 VB2_BUF_STATE_QUEUED); 101 } 102 } 103 return err; 104} 105 106/* abort streaming and wait for last buffer */ 107static void vbi_out_stop_streaming(struct vb2_queue *vq) 108{ 109 struct vivid_dev *dev = vb2_get_drv_priv(vq); 110 111 dprintk(dev, 1, "%s\n", __func__); 112 vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming); 113 dev->vbi_out_have_wss = false; 114 dev->vbi_out_have_cc[0] = false; 115 dev->vbi_out_have_cc[1] = false; 116} 117 118static void vbi_out_buf_request_complete(struct vb2_buffer *vb) 119{ 120 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 121 122 v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vbi_out); 123} 124 125const struct vb2_ops vivid_vbi_out_qops = { 126 .queue_setup = vbi_out_queue_setup, 127 .buf_prepare = vbi_out_buf_prepare, 128 .buf_queue = vbi_out_buf_queue, 129 .start_streaming = vbi_out_start_streaming, 130 .stop_streaming = vbi_out_stop_streaming, 131 .buf_request_complete = vbi_out_buf_request_complete, 132 .wait_prepare = vb2_ops_wait_prepare, 133 .wait_finish = vb2_ops_wait_finish, 134}; 135 136int vidioc_g_fmt_vbi_out(struct file *file, void *priv, 137 struct v4l2_format *f) 138{ 139 struct vivid_dev *dev = video_drvdata(file); 140 struct v4l2_vbi_format *vbi = &f->fmt.vbi; 141 bool is_60hz = dev->std_out & V4L2_STD_525_60; 142 143 if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out) 144 return -EINVAL; 145 146 vbi->sampling_rate = 25000000; 147 vbi->offset = 24; 148 vbi->samples_per_line = 1440; 149 vbi->sample_format = V4L2_PIX_FMT_GREY; 150 vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5; 151 vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5; 152 vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18; 153 vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0; 154 vbi->reserved[0] = 0; 155 vbi->reserved[1] = 0; 156 return 0; 157} 158 159int vidioc_s_fmt_vbi_out(struct file *file, void *priv, 160 struct v4l2_format *f) 161{ 162 struct vivid_dev *dev = video_drvdata(file); 163 int ret = vidioc_g_fmt_vbi_out(file, priv, f); 164 165 if (ret) 166 return ret; 167 if (vb2_is_busy(&dev->vb_vbi_out_q)) 168 return -EBUSY; 169 dev->stream_sliced_vbi_out = false; 170 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT; 171 return 0; 172} 173 174int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) 175{ 176 struct vivid_dev *dev = video_drvdata(file); 177 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 178 179 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) 180 return -EINVAL; 181 182 vivid_fill_service_lines(vbi, dev->service_set_out); 183 return 0; 184} 185 186int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt) 187{ 188 struct vivid_dev *dev = video_drvdata(file); 189 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 190 bool is_60hz = dev->std_out & V4L2_STD_525_60; 191 u32 service_set = vbi->service_set; 192 193 if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out) 194 return -EINVAL; 195 196 service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 : 197 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B; 198 vivid_fill_service_lines(vbi, service_set); 199 return 0; 200} 201 202int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, 203 struct v4l2_format *fmt) 204{ 205 struct vivid_dev *dev = video_drvdata(file); 206 struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced; 207 int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt); 208 209 if (ret) 210 return ret; 211 if (vb2_is_busy(&dev->vb_vbi_out_q)) 212 return -EBUSY; 213 dev->service_set_out = vbi->service_set; 214 dev->stream_sliced_vbi_out = true; 215 dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT; 216 return 0; 217} 218 219void vivid_sliced_vbi_out_process(struct vivid_dev *dev, 220 struct vivid_buffer *buf) 221{ 222 struct v4l2_sliced_vbi_data *vbi = 223 vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 224 unsigned elems = 225 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi); 226 227 dev->vbi_out_have_cc[0] = false; 228 dev->vbi_out_have_cc[1] = false; 229 dev->vbi_out_have_wss = false; 230 while (elems--) { 231 switch (vbi->id) { 232 case V4L2_SLICED_CAPTION_525: 233 if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) { 234 dev->vbi_out_have_cc[!!vbi->field] = true; 235 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0]; 236 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1]; 237 } 238 break; 239 case V4L2_SLICED_WSS_625: 240 if ((dev->std_out & V4L2_STD_625_50) && 241 vbi->field == 0 && vbi->line == 23) { 242 dev->vbi_out_have_wss = true; 243 dev->vbi_out_wss[0] = vbi->data[0]; 244 dev->vbi_out_wss[1] = vbi->data[1]; 245 } 246 break; 247 } 248 vbi++; 249 } 250} 251