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
vbi_out_queue_setup(struct vb2_queue * vq,unsigned * nbuffers,unsigned * nplanes,unsigned sizes[],struct device * alloc_devs[])18 static 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
vbi_out_buf_prepare(struct vb2_buffer * vb)40 static 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
vbi_out_buf_queue(struct vb2_buffer * vb)68 static 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
vbi_out_start_streaming(struct vb2_queue * vq,unsigned count)81 static 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 */
vbi_out_stop_streaming(struct vb2_queue * vq)107 static 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
vbi_out_buf_request_complete(struct vb2_buffer * vb)118 static 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
125 const 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
vidioc_g_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)136 int 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
vidioc_s_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)159 int 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
vidioc_g_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)174 int 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
vidioc_try_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)186 int 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
vidioc_s_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)202 int 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
vivid_sliced_vbi_out_process(struct vivid_dev * dev,struct vivid_buffer * buf)219 void 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