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 if (*nplanes)
32 return sizes[0] < size ? -EINVAL : 0;
33 sizes[0] = size;
34
35 *nplanes = 1;
36 return 0;
37 }
38
vbi_out_buf_prepare(struct vb2_buffer * vb)39 static 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() returns
52 * 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
vbi_out_buf_queue(struct vb2_buffer * vb)67 static 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
vbi_out_start_streaming(struct vb2_queue * vq,unsigned count)80 static 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 */
vbi_out_stop_streaming(struct vb2_queue * vq)106 static 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
vbi_out_buf_request_complete(struct vb2_buffer * vb)117 static 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
124 const 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
vidioc_g_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)135 int 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
vidioc_s_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)158 int 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
vidioc_g_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)173 int 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
vidioc_try_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)185 int 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
vidioc_s_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)201 int 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
vivid_sliced_vbi_out_process(struct vivid_dev * dev,struct vivid_buffer * buf)218 void 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