1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * vivid-vbi-cap.c - vbi capture 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-cap.h"
15 #include "vivid-vbi-cap.h"
16 #include "vivid-vbi-gen.h"
17 
vivid_sliced_vbi_cap_fill(struct vivid_dev * dev,unsigned seqnr)18 static void vivid_sliced_vbi_cap_fill(struct vivid_dev *dev, unsigned seqnr)
19 {
20 	struct vivid_vbi_gen_data *vbi_gen = &dev->vbi_gen;
21 	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
22 
23 	vivid_vbi_gen_sliced(vbi_gen, is_60hz, seqnr);
24 
25 	if (!is_60hz) {
26 		if (dev->loop_video) {
27 			if (dev->vbi_out_have_wss) {
28 				vbi_gen->data[12].data[0] = dev->vbi_out_wss[0];
29 				vbi_gen->data[12].data[1] = dev->vbi_out_wss[1];
30 			} else {
31 				vbi_gen->data[12].id = 0;
32 			}
33 		} else {
34 			switch (tpg_g_video_aspect(&dev->tpg)) {
35 			case TPG_VIDEO_ASPECT_14X9_CENTRE:
36 				vbi_gen->data[12].data[0] = 0x01;
37 				break;
38 			case TPG_VIDEO_ASPECT_16X9_CENTRE:
39 				vbi_gen->data[12].data[0] = 0x0b;
40 				break;
41 			case TPG_VIDEO_ASPECT_16X9_ANAMORPHIC:
42 				vbi_gen->data[12].data[0] = 0x07;
43 				break;
44 			case TPG_VIDEO_ASPECT_4X3:
45 			default:
46 				vbi_gen->data[12].data[0] = 0x08;
47 				break;
48 			}
49 		}
50 	} else if (dev->loop_video && is_60hz) {
51 		if (dev->vbi_out_have_cc[0]) {
52 			vbi_gen->data[0].data[0] = dev->vbi_out_cc[0][0];
53 			vbi_gen->data[0].data[1] = dev->vbi_out_cc[0][1];
54 		} else {
55 			vbi_gen->data[0].id = 0;
56 		}
57 		if (dev->vbi_out_have_cc[1]) {
58 			vbi_gen->data[1].data[0] = dev->vbi_out_cc[1][0];
59 			vbi_gen->data[1].data[1] = dev->vbi_out_cc[1][1];
60 		} else {
61 			vbi_gen->data[1].id = 0;
62 		}
63 	}
64 }
65 
vivid_g_fmt_vbi_cap(struct vivid_dev * dev,struct v4l2_vbi_format * vbi)66 static void vivid_g_fmt_vbi_cap(struct vivid_dev *dev, struct v4l2_vbi_format *vbi)
67 {
68 	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
69 
70 	vbi->sampling_rate = 27000000;
71 	vbi->offset = 24;
72 	vbi->samples_per_line = 1440;
73 	vbi->sample_format = V4L2_PIX_FMT_GREY;
74 	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
75 	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
76 	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
77 	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
78 	vbi->reserved[0] = 0;
79 	vbi->reserved[1] = 0;
80 }
81 
vivid_raw_vbi_cap_process(struct vivid_dev * dev,struct vivid_buffer * buf)82 void vivid_raw_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
83 {
84 	struct v4l2_vbi_format vbi;
85 	u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
86 
87 	vivid_g_fmt_vbi_cap(dev, &vbi);
88 	buf->vb.sequence = dev->vbi_cap_seq_count;
89 	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
90 		buf->vb.sequence /= 2;
91 
92 	vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
93 
94 	memset(vbuf, 0x10, vb2_plane_size(&buf->vb.vb2_buf, 0));
95 
96 	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input]))
97 		vivid_vbi_gen_raw(&dev->vbi_gen, &vbi, vbuf);
98 }
99 
100 
vivid_sliced_vbi_cap_process(struct vivid_dev * dev,struct vivid_buffer * buf)101 void vivid_sliced_vbi_cap_process(struct vivid_dev *dev,
102 			struct vivid_buffer *buf)
103 {
104 	struct v4l2_sliced_vbi_data *vbuf =
105 			vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
106 
107 	buf->vb.sequence = dev->vbi_cap_seq_count;
108 	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
109 		buf->vb.sequence /= 2;
110 
111 	vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
112 
113 	memset(vbuf, 0, vb2_plane_size(&buf->vb.vb2_buf, 0));
114 	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input])) {
115 		unsigned i;
116 
117 		for (i = 0; i < 25; i++)
118 			vbuf[i] = dev->vbi_gen.data[i];
119 	}
120 }
121 
vbi_cap_queue_setup(struct vb2_queue * vq,unsigned * nbuffers,unsigned * nplanes,unsigned sizes[],struct device * alloc_devs[])122 static int vbi_cap_queue_setup(struct vb2_queue *vq,
123 		       unsigned *nbuffers, unsigned *nplanes,
124 		       unsigned sizes[], struct device *alloc_devs[])
125 {
126 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
127 	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
128 	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
129 		36 * sizeof(struct v4l2_sliced_vbi_data) :
130 		1440 * 2 * (is_60hz ? 12 : 18);
131 
132 	if (!vivid_is_sdtv_cap(dev))
133 		return -EINVAL;
134 
135 	sizes[0] = size;
136 
137 	if (vq->num_buffers + *nbuffers < 2)
138 		*nbuffers = 2 - vq->num_buffers;
139 
140 	*nplanes = 1;
141 	return 0;
142 }
143 
vbi_cap_buf_prepare(struct vb2_buffer * vb)144 static int vbi_cap_buf_prepare(struct vb2_buffer *vb)
145 {
146 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
147 	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
148 	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
149 		36 * sizeof(struct v4l2_sliced_vbi_data) :
150 		1440 * 2 * (is_60hz ? 12 : 18);
151 
152 	dprintk(dev, 1, "%s\n", __func__);
153 
154 	if (dev->buf_prepare_error) {
155 		/*
156 		 * Error injection: test what happens if buf_prepare() returns
157 		 * an error.
158 		 */
159 		dev->buf_prepare_error = false;
160 		return -EINVAL;
161 	}
162 	if (vb2_plane_size(vb, 0) < size) {
163 		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
164 				__func__, vb2_plane_size(vb, 0), size);
165 		return -EINVAL;
166 	}
167 	vb2_set_plane_payload(vb, 0, size);
168 
169 	return 0;
170 }
171 
vbi_cap_buf_queue(struct vb2_buffer * vb)172 static void vbi_cap_buf_queue(struct vb2_buffer *vb)
173 {
174 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
175 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
176 	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
177 
178 	dprintk(dev, 1, "%s\n", __func__);
179 
180 	spin_lock(&dev->slock);
181 	list_add_tail(&buf->list, &dev->vbi_cap_active);
182 	spin_unlock(&dev->slock);
183 }
184 
vbi_cap_start_streaming(struct vb2_queue * vq,unsigned count)185 static int vbi_cap_start_streaming(struct vb2_queue *vq, unsigned count)
186 {
187 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
188 	int err;
189 
190 	dprintk(dev, 1, "%s\n", __func__);
191 	dev->vbi_cap_seq_count = 0;
192 	if (dev->start_streaming_error) {
193 		dev->start_streaming_error = false;
194 		err = -EINVAL;
195 	} else {
196 		err = vivid_start_generating_vid_cap(dev, &dev->vbi_cap_streaming);
197 	}
198 	if (err) {
199 		struct vivid_buffer *buf, *tmp;
200 
201 		list_for_each_entry_safe(buf, tmp, &dev->vbi_cap_active, list) {
202 			list_del(&buf->list);
203 			vb2_buffer_done(&buf->vb.vb2_buf,
204 					VB2_BUF_STATE_QUEUED);
205 		}
206 	}
207 	return err;
208 }
209 
210 /* abort streaming and wait for last buffer */
vbi_cap_stop_streaming(struct vb2_queue * vq)211 static void vbi_cap_stop_streaming(struct vb2_queue *vq)
212 {
213 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
214 
215 	dprintk(dev, 1, "%s\n", __func__);
216 	vivid_stop_generating_vid_cap(dev, &dev->vbi_cap_streaming);
217 }
218 
vbi_cap_buf_request_complete(struct vb2_buffer * vb)219 static void vbi_cap_buf_request_complete(struct vb2_buffer *vb)
220 {
221 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
222 
223 	v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vbi_cap);
224 }
225 
226 const struct vb2_ops vivid_vbi_cap_qops = {
227 	.queue_setup		= vbi_cap_queue_setup,
228 	.buf_prepare		= vbi_cap_buf_prepare,
229 	.buf_queue		= vbi_cap_buf_queue,
230 	.start_streaming	= vbi_cap_start_streaming,
231 	.stop_streaming		= vbi_cap_stop_streaming,
232 	.buf_request_complete	= vbi_cap_buf_request_complete,
233 	.wait_prepare		= vb2_ops_wait_prepare,
234 	.wait_finish		= vb2_ops_wait_finish,
235 };
236 
vidioc_g_fmt_vbi_cap(struct file * file,void * priv,struct v4l2_format * f)237 int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
238 					struct v4l2_format *f)
239 {
240 	struct vivid_dev *dev = video_drvdata(file);
241 	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
242 
243 	if (!vivid_is_sdtv_cap(dev) || !dev->has_raw_vbi_cap)
244 		return -EINVAL;
245 
246 	vivid_g_fmt_vbi_cap(dev, vbi);
247 	return 0;
248 }
249 
vidioc_s_fmt_vbi_cap(struct file * file,void * priv,struct v4l2_format * f)250 int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
251 					struct v4l2_format *f)
252 {
253 	struct vivid_dev *dev = video_drvdata(file);
254 	int ret = vidioc_g_fmt_vbi_cap(file, priv, f);
255 
256 	if (ret)
257 		return ret;
258 	if (f->type != V4L2_BUF_TYPE_VBI_CAPTURE && vb2_is_busy(&dev->vb_vbi_cap_q))
259 		return -EBUSY;
260 	return 0;
261 }
262 
vivid_fill_service_lines(struct v4l2_sliced_vbi_format * vbi,u32 service_set)263 void vivid_fill_service_lines(struct v4l2_sliced_vbi_format *vbi, u32 service_set)
264 {
265 	vbi->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
266 	vbi->service_set = service_set;
267 	memset(vbi->service_lines, 0, sizeof(vbi->service_lines));
268 	memset(vbi->reserved, 0, sizeof(vbi->reserved));
269 
270 	if (vbi->service_set == 0)
271 		return;
272 
273 	if (vbi->service_set & V4L2_SLICED_CAPTION_525) {
274 		vbi->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
275 		vbi->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
276 	}
277 	if (vbi->service_set & V4L2_SLICED_WSS_625) {
278 		unsigned i;
279 
280 		for (i = 7; i <= 18; i++)
281 			vbi->service_lines[0][i] =
282 			vbi->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
283 		vbi->service_lines[0][23] = V4L2_SLICED_WSS_625;
284 	}
285 }
286 
vidioc_g_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)287 int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
288 {
289 	struct vivid_dev *dev = video_drvdata(file);
290 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
291 
292 	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
293 		return -EINVAL;
294 
295 	vivid_fill_service_lines(vbi, dev->service_set_cap);
296 	return 0;
297 }
298 
vidioc_try_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)299 int vidioc_try_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
300 {
301 	struct vivid_dev *dev = video_drvdata(file);
302 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
303 	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
304 	u32 service_set = vbi->service_set;
305 
306 	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
307 		return -EINVAL;
308 
309 	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
310 				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
311 	vivid_fill_service_lines(vbi, service_set);
312 	return 0;
313 }
314 
vidioc_s_fmt_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_format * fmt)315 int vidioc_s_fmt_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_format *fmt)
316 {
317 	struct vivid_dev *dev = video_drvdata(file);
318 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
319 	int ret = vidioc_try_fmt_sliced_vbi_cap(file, fh, fmt);
320 
321 	if (ret)
322 		return ret;
323 	if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE && vb2_is_busy(&dev->vb_vbi_cap_q))
324 		return -EBUSY;
325 	dev->service_set_cap = vbi->service_set;
326 	return 0;
327 }
328 
vidioc_g_sliced_vbi_cap(struct file * file,void * fh,struct v4l2_sliced_vbi_cap * cap)329 int vidioc_g_sliced_vbi_cap(struct file *file, void *fh, struct v4l2_sliced_vbi_cap *cap)
330 {
331 	struct vivid_dev *dev = video_drvdata(file);
332 	struct video_device *vdev = video_devdata(file);
333 	bool is_60hz;
334 
335 	if (vdev->vfl_dir == VFL_DIR_RX) {
336 		is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
337 		if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap ||
338 		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
339 			return -EINVAL;
340 	} else {
341 		is_60hz = dev->std_out & V4L2_STD_525_60;
342 		if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out ||
343 		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT)
344 			return -EINVAL;
345 	}
346 
347 	cap->service_set = is_60hz ? V4L2_SLICED_CAPTION_525 :
348 				     V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
349 	if (is_60hz) {
350 		cap->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
351 		cap->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
352 	} else {
353 		unsigned i;
354 
355 		for (i = 7; i <= 18; i++)
356 			cap->service_lines[0][i] =
357 			cap->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
358 		cap->service_lines[0][23] = V4L2_SLICED_WSS_625;
359 	}
360 	return 0;
361 }
362