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1 /*
2  * vivid-vbi-out.c - vbi output support functions.
3  *
4  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
5  *
6  * This program is free software; you may redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
11  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
13  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
14  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
15  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
16  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17  * SOFTWARE.
18  */
19 
20 #include <linux/errno.h>
21 #include <linux/kernel.h>
22 #include <linux/videodev2.h>
23 #include <media/v4l2-common.h>
24 
25 #include "vivid-core.h"
26 #include "vivid-kthread-out.h"
27 #include "vivid-vbi-out.h"
28 #include "vivid-vbi-cap.h"
29 
vbi_out_queue_setup(struct vb2_queue * vq,const struct v4l2_format * fmt,unsigned * nbuffers,unsigned * nplanes,unsigned sizes[],void * alloc_ctxs[])30 static int vbi_out_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
31 		       unsigned *nbuffers, unsigned *nplanes,
32 		       unsigned sizes[], void *alloc_ctxs[])
33 {
34 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
35 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
36 	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
37 		36 * sizeof(struct v4l2_sliced_vbi_data) :
38 		1440 * 2 * (is_60hz ? 12 : 18);
39 
40 	if (!vivid_is_svid_out(dev))
41 		return -EINVAL;
42 
43 	sizes[0] = size;
44 
45 	if (vq->num_buffers + *nbuffers < 2)
46 		*nbuffers = 2 - vq->num_buffers;
47 
48 	*nplanes = 1;
49 	return 0;
50 }
51 
vbi_out_buf_prepare(struct vb2_buffer * vb)52 static int vbi_out_buf_prepare(struct vb2_buffer *vb)
53 {
54 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
55 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
56 	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
57 		36 * sizeof(struct v4l2_sliced_vbi_data) :
58 		1440 * 2 * (is_60hz ? 12 : 18);
59 
60 	dprintk(dev, 1, "%s\n", __func__);
61 
62 	if (dev->buf_prepare_error) {
63 		/*
64 		 * Error injection: test what happens if buf_prepare() returns
65 		 * an error.
66 		 */
67 		dev->buf_prepare_error = false;
68 		return -EINVAL;
69 	}
70 	if (vb2_plane_size(vb, 0) < size) {
71 		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
72 				__func__, vb2_plane_size(vb, 0), size);
73 		return -EINVAL;
74 	}
75 	vb2_set_plane_payload(vb, 0, size);
76 
77 	return 0;
78 }
79 
vbi_out_buf_queue(struct vb2_buffer * vb)80 static void vbi_out_buf_queue(struct vb2_buffer *vb)
81 {
82 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
83 	struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);
84 
85 	dprintk(dev, 1, "%s\n", __func__);
86 
87 	spin_lock(&dev->slock);
88 	list_add_tail(&buf->list, &dev->vbi_out_active);
89 	spin_unlock(&dev->slock);
90 }
91 
vbi_out_start_streaming(struct vb2_queue * vq,unsigned count)92 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
93 {
94 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
95 	int err;
96 
97 	dprintk(dev, 1, "%s\n", __func__);
98 	dev->vbi_out_seq_count = 0;
99 	if (dev->start_streaming_error) {
100 		dev->start_streaming_error = false;
101 		err = -EINVAL;
102 	} else {
103 		err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
104 	}
105 	if (err) {
106 		struct vivid_buffer *buf, *tmp;
107 
108 		list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
109 			list_del(&buf->list);
110 			vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
111 		}
112 	}
113 	return err;
114 }
115 
116 /* abort streaming and wait for last buffer */
vbi_out_stop_streaming(struct vb2_queue * vq)117 static void vbi_out_stop_streaming(struct vb2_queue *vq)
118 {
119 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
120 
121 	dprintk(dev, 1, "%s\n", __func__);
122 	vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
123 	dev->vbi_out_have_wss = false;
124 	dev->vbi_out_have_cc[0] = false;
125 	dev->vbi_out_have_cc[1] = false;
126 }
127 
128 const struct vb2_ops vivid_vbi_out_qops = {
129 	.queue_setup		= vbi_out_queue_setup,
130 	.buf_prepare		= vbi_out_buf_prepare,
131 	.buf_queue		= vbi_out_buf_queue,
132 	.start_streaming	= vbi_out_start_streaming,
133 	.stop_streaming		= vbi_out_stop_streaming,
134 	.wait_prepare		= vivid_unlock,
135 	.wait_finish		= vivid_lock,
136 };
137 
vidioc_g_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)138 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
139 					struct v4l2_format *f)
140 {
141 	struct vivid_dev *dev = video_drvdata(file);
142 	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
143 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
144 
145 	if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
146 		return -EINVAL;
147 
148 	vbi->sampling_rate = 25000000;
149 	vbi->offset = 24;
150 	vbi->samples_per_line = 1440;
151 	vbi->sample_format = V4L2_PIX_FMT_GREY;
152 	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
153 	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
154 	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
155 	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
156 	vbi->reserved[0] = 0;
157 	vbi->reserved[1] = 0;
158 	return 0;
159 }
160 
vidioc_s_fmt_vbi_out(struct file * file,void * priv,struct v4l2_format * f)161 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
162 					struct v4l2_format *f)
163 {
164 	struct vivid_dev *dev = video_drvdata(file);
165 	int ret = vidioc_g_fmt_vbi_out(file, priv, f);
166 
167 	if (ret)
168 		return ret;
169 	if (vb2_is_busy(&dev->vb_vbi_out_q))
170 		return -EBUSY;
171 	dev->stream_sliced_vbi_out = false;
172 	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
173 	return 0;
174 }
175 
vidioc_g_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)176 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
177 {
178 	struct vivid_dev *dev = video_drvdata(file);
179 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
180 
181 	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
182 		return -EINVAL;
183 
184 	vivid_fill_service_lines(vbi, dev->service_set_out);
185 	return 0;
186 }
187 
vidioc_try_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)188 int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
189 {
190 	struct vivid_dev *dev = video_drvdata(file);
191 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
192 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
193 	u32 service_set = vbi->service_set;
194 
195 	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
196 		return -EINVAL;
197 
198 	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
199 				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
200 	vivid_fill_service_lines(vbi, service_set);
201 	return 0;
202 }
203 
vidioc_s_fmt_sliced_vbi_out(struct file * file,void * fh,struct v4l2_format * fmt)204 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
205 {
206 	struct vivid_dev *dev = video_drvdata(file);
207 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
208 	int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
209 
210 	if (ret)
211 		return ret;
212 	if (vb2_is_busy(&dev->vb_vbi_out_q))
213 		return -EBUSY;
214 	dev->service_set_out = vbi->service_set;
215 	dev->stream_sliced_vbi_out = true;
216 	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
217 	return 0;
218 }
219 
vivid_sliced_vbi_out_process(struct vivid_dev * dev,struct vivid_buffer * buf)220 void vivid_sliced_vbi_out_process(struct vivid_dev *dev, struct vivid_buffer *buf)
221 {
222 	struct v4l2_sliced_vbi_data *vbi = vb2_plane_vaddr(&buf->vb, 0);
223 	unsigned elems = vb2_get_plane_payload(&buf->vb, 0) / sizeof(*vbi);
224 
225 	dev->vbi_out_have_cc[0] = false;
226 	dev->vbi_out_have_cc[1] = false;
227 	dev->vbi_out_have_wss = false;
228 	while (elems--) {
229 		switch (vbi->id) {
230 		case V4L2_SLICED_CAPTION_525:
231 			if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
232 				dev->vbi_out_have_cc[!!vbi->field] = true;
233 				dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
234 				dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
235 			}
236 			break;
237 		case V4L2_SLICED_WSS_625:
238 			if ((dev->std_out & V4L2_STD_625_50) &&
239 			    vbi->field == 0 && vbi->line == 23) {
240 				dev->vbi_out_have_wss = true;
241 				dev->vbi_out_wss[0] = vbi->data[0];
242 				dev->vbi_out_wss[1] = vbi->data[1];
243 			}
244 			break;
245 		}
246 		vbi++;
247 	}
248 }
249