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

source code of linux/drivers/media/test-drivers/vivid/vivid-vbi-out.c