summaryrefslogtreecommitdiff
path: root/drivers/media/platform/vivid/vivid-vbi-out.c
blob: 69486c130a7e4f4e945d2912d3a6ee27161ffb86 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
// SPDX-License-Identifier: GPL-2.0-only
/*
 * vivid-vbi-out.c - vbi output support functions.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>

#include "vivid-core.h"
#include "vivid-kthread-out.h"
#include "vivid-vbi-out.h"
#include "vivid-vbi-cap.h"

static int vbi_out_queue_setup(struct vb2_queue *vq,
		       unsigned *nbuffers, unsigned *nplanes,
		       unsigned sizes[], struct device *alloc_devs[])
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
		36 * sizeof(struct v4l2_sliced_vbi_data) :
		1440 * 2 * (is_60hz ? 12 : 18);

	if (!vivid_is_svid_out(dev))
		return -EINVAL;

	sizes[0] = size;

	if (vq->num_buffers + *nbuffers < 2)
		*nbuffers = 2 - vq->num_buffers;

	*nplanes = 1;
	return 0;
}

static int vbi_out_buf_prepare(struct vb2_buffer *vb)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
		36 * sizeof(struct v4l2_sliced_vbi_data) :
		1440 * 2 * (is_60hz ? 12 : 18);

	dprintk(dev, 1, "%s\n", __func__);

	if (dev->buf_prepare_error) {
		/*
		 * Error injection: test what happens if buf_prepare() returns
		 * an error.
		 */
		dev->buf_prepare_error = false;
		return -EINVAL;
	}
	if (vb2_plane_size(vb, 0) < size) {
		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
				__func__, vb2_plane_size(vb, 0), size);
		return -EINVAL;
	}
	vb2_set_plane_payload(vb, 0, size);

	return 0;
}

static void vbi_out_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);

	dprintk(dev, 1, "%s\n", __func__);

	spin_lock(&dev->slock);
	list_add_tail(&buf->list, &dev->vbi_out_active);
	spin_unlock(&dev->slock);
}

static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	int err;

	dprintk(dev, 1, "%s\n", __func__);
	dev->vbi_out_seq_count = 0;
	if (dev->start_streaming_error) {
		dev->start_streaming_error = false;
		err = -EINVAL;
	} else {
		err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
	}
	if (err) {
		struct vivid_buffer *buf, *tmp;

		list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
			list_del(&buf->list);
			vb2_buffer_done(&buf->vb.vb2_buf,
					VB2_BUF_STATE_QUEUED);
		}
	}
	return err;
}

/* abort streaming and wait for last buffer */
static void vbi_out_stop_streaming(struct vb2_queue *vq)
{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);

	dprintk(dev, 1, "%s\n", __func__);
	vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
	dev->vbi_out_have_wss = false;
	dev->vbi_out_have_cc[0] = false;
	dev->vbi_out_have_cc[1] = false;
}

const struct vb2_ops vivid_vbi_out_qops = {
	.queue_setup		= vbi_out_queue_setup,
	.buf_prepare		= vbi_out_buf_prepare,
	.buf_queue		= vbi_out_buf_queue,
	.start_streaming	= vbi_out_start_streaming,
	.stop_streaming		= vbi_out_stop_streaming,
	.wait_prepare		= vb2_ops_wait_prepare,
	.wait_finish		= vb2_ops_wait_finish,
};

int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
	bool is_60hz = dev->std_out & V4L2_STD_525_60;

	if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
		return -EINVAL;

	vbi->sampling_rate = 25000000;
	vbi->offset = 24;
	vbi->samples_per_line = 1440;
	vbi->sample_format = V4L2_PIX_FMT_GREY;
	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
	vbi->reserved[0] = 0;
	vbi->reserved[1] = 0;
	return 0;
}

int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
					struct v4l2_format *f)
{
	struct vivid_dev *dev = video_drvdata(file);
	int ret = vidioc_g_fmt_vbi_out(file, priv, f);

	if (ret)
		return ret;
	if (vb2_is_busy(&dev->vb_vbi_out_q))
		return -EBUSY;
	dev->stream_sliced_vbi_out = false;
	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
	return 0;
}

int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;

	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
		return -EINVAL;

	vivid_fill_service_lines(vbi, dev->service_set_out);
	return 0;
}

int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	u32 service_set = vbi->service_set;

	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
		return -EINVAL;

	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
	vivid_fill_service_lines(vbi, service_set);
	return 0;
}

int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
		struct v4l2_format *fmt)
{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
	int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);

	if (ret)
		return ret;
	if (vb2_is_busy(&dev->vb_vbi_out_q))
		return -EBUSY;
	dev->service_set_out = vbi->service_set;
	dev->stream_sliced_vbi_out = true;
	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
	return 0;
}

void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
		struct vivid_buffer *buf)
{
	struct v4l2_sliced_vbi_data *vbi =
		vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
	unsigned elems =
		vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);

	dev->vbi_out_have_cc[0] = false;
	dev->vbi_out_have_cc[1] = false;
	dev->vbi_out_have_wss = false;
	while (elems--) {
		switch (vbi->id) {
		case V4L2_SLICED_CAPTION_525:
			if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
				dev->vbi_out_have_cc[!!vbi->field] = true;
				dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
				dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
			}
			break;
		case V4L2_SLICED_WSS_625:
			if ((dev->std_out & V4L2_STD_625_50) &&
			    vbi->field == 0 && vbi->line == 23) {
				dev->vbi_out_have_wss = true;
				dev->vbi_out_wss[0] = vbi->data[0];
				dev->vbi_out_wss[1] = vbi->data[1];
			}
			break;
		}
		vbi++;
	}
}