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