vivid-vbi-cap.c

  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#include "vivid-vid-common.h"
 18
 19static void vivid_sliced_vbi_cap_fill(struct vivid_dev *dev, unsigned seqnr)
 20{
 21	struct vivid_vbi_gen_data *vbi_gen = &dev->vbi_gen;
 22	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
 23
 24	vivid_vbi_gen_sliced(vbi_gen, is_60hz, seqnr);
 25
 26	if (!is_60hz) {
 27		if (vivid_vid_can_loop(dev)) {
 28			if (dev->vbi_out_have_wss) {
 29				vbi_gen->data[12].data[0] = dev->vbi_out_wss[0];
 30				vbi_gen->data[12].data[1] = dev->vbi_out_wss[1];
 31			} else {
 32				vbi_gen->data[12].id = 0;
 33			}
 34		} else {
 35			switch (tpg_g_video_aspect(&dev->tpg)) {
 36			case TPG_VIDEO_ASPECT_14X9_CENTRE:
 37				vbi_gen->data[12].data[0] = 0x01;
 38				break;
 39			case TPG_VIDEO_ASPECT_16X9_CENTRE:
 40				vbi_gen->data[12].data[0] = 0x0b;
 41				break;
 42			case TPG_VIDEO_ASPECT_16X9_ANAMORPHIC:
 43				vbi_gen->data[12].data[0] = 0x07;
 44				break;
 45			case TPG_VIDEO_ASPECT_4X3:
 46			default:
 47				vbi_gen->data[12].data[0] = 0x08;
 48				break;
 49			}
 50		}
 51	} else if (vivid_vid_can_loop(dev) && is_60hz) {
 52		if (dev->vbi_out_have_cc[0]) {
 53			vbi_gen->data[0].data[0] = dev->vbi_out_cc[0][0];
 54			vbi_gen->data[0].data[1] = dev->vbi_out_cc[0][1];
 55		} else {
 56			vbi_gen->data[0].id = 0;
 57		}
 58		if (dev->vbi_out_have_cc[1]) {
 59			vbi_gen->data[1].data[0] = dev->vbi_out_cc[1][0];
 60			vbi_gen->data[1].data[1] = dev->vbi_out_cc[1][1];
 61		} else {
 62			vbi_gen->data[1].id = 0;
 63		}
 64	}
 65}
 66
 67static void vivid_g_fmt_vbi_cap(struct vivid_dev *dev, struct v4l2_vbi_format *vbi)
 68{
 69	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
 70
 71	vbi->sampling_rate = 27000000;
 72	vbi->offset = 24;
 73	vbi->samples_per_line = 1440;
 74	vbi->sample_format = V4L2_PIX_FMT_GREY;
 75	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
 76	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
 77	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
 78	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
 79	vbi->reserved[0] = 0;
 80	vbi->reserved[1] = 0;
 81}
 82
 83void vivid_raw_vbi_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
 84{
 85	struct v4l2_vbi_format vbi;
 86	u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 87
 88	vivid_g_fmt_vbi_cap(dev, &vbi);
 89	buf->vb.sequence = dev->vbi_cap_seq_count;
 90	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
 91		buf->vb.sequence /= 2;
 92
 93	vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
 94
 95	memset(vbuf, 0x10, vb2_plane_size(&buf->vb.vb2_buf, 0));
 96
 97	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input]))
 98		vivid_vbi_gen_raw(&dev->vbi_gen, &vbi, vbuf);
 99}
100
101
102void vivid_sliced_vbi_cap_process(struct vivid_dev *dev,
103			struct vivid_buffer *buf)
104{
105	struct v4l2_sliced_vbi_data *vbuf =
106			vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
107
108	buf->vb.sequence = dev->vbi_cap_seq_count;
109	if (dev->field_cap == V4L2_FIELD_ALTERNATE)
110		buf->vb.sequence /= 2;
111
112	vivid_sliced_vbi_cap_fill(dev, buf->vb.sequence);
113
114	memset(vbuf, 0, vb2_plane_size(&buf->vb.vb2_buf, 0));
115	if (!VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input])) {
116		unsigned i;
117
118		for (i = 0; i < 25; i++)
119			vbuf[i] = dev->vbi_gen.data[i];
120	}
121}
122
123static int vbi_cap_queue_setup(struct vb2_queue *vq,
124		       unsigned *nbuffers, unsigned *nplanes,
125		       unsigned sizes[], struct device *alloc_devs[])
126{
127	struct vivid_dev *dev = vb2_get_drv_priv(vq);
128	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
129	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE ?
130		36 * sizeof(struct v4l2_sliced_vbi_data) :
131		1440 * 2 * (is_60hz ? 12 : 18);
132
133	if (!vivid_is_sdtv_cap(dev))
134		return -EINVAL;
135
136	if (*nplanes)
137		return sizes[0] < size ? -EINVAL : 0;
138	sizes[0] = size;
139
140	*nplanes = 1;
141	return 0;
142}
143
144static 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
172static 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
185static 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 */
211static 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
219static 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
226const 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};
234
235int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
236					struct v4l2_format *f)
237{
238	struct vivid_dev *dev = video_drvdata(file);
239	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
240
241	if (!vivid_is_sdtv_cap(dev) || !dev->has_raw_vbi_cap)
242		return -EINVAL;
243
244	vivid_g_fmt_vbi_cap(dev, vbi);
245	return 0;
246}
247
248int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
249					struct v4l2_format *f)
250{
251	struct vivid_dev *dev = video_drvdata(file);
252	int ret = vidioc_g_fmt_vbi_cap(file, priv, f);
253
254	if (ret)
255		return ret;
256	if (f->type != V4L2_BUF_TYPE_VBI_CAPTURE && vb2_is_busy(&dev->vb_vbi_cap_q))
257		return -EBUSY;
258	return 0;
259}
260
261void vivid_fill_service_lines(struct v4l2_sliced_vbi_format *vbi, u32 service_set)
262{
263	vbi->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
264	vbi->service_set = service_set;
265	memset(vbi->service_lines, 0, sizeof(vbi->service_lines));
266	memset(vbi->reserved, 0, sizeof(vbi->reserved));
267
268	if (vbi->service_set == 0)
269		return;
270
271	if (vbi->service_set & V4L2_SLICED_CAPTION_525) {
272		vbi->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
273		vbi->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
274	}
275	if (vbi->service_set & V4L2_SLICED_WSS_625) {
276		unsigned i;
277
278		for (i = 7; i <= 18; i++)
279			vbi->service_lines[0][i] =
280			vbi->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
281		vbi->service_lines[0][23] = V4L2_SLICED_WSS_625;
282	}
283}
284
285int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv, struct v4l2_format *fmt)
286{
287	struct vivid_dev *dev = video_drvdata(file);
288	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
289
290	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
291		return -EINVAL;
292
293	vivid_fill_service_lines(vbi, dev->service_set_cap);
294	return 0;
295}
296
297int vidioc_try_fmt_sliced_vbi_cap(struct file *file, void *priv, struct v4l2_format *fmt)
298{
299	struct vivid_dev *dev = video_drvdata(file);
300	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
301	bool is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
302	u32 service_set = vbi->service_set;
303
304	if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap)
305		return -EINVAL;
306
307	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
308				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
309	vivid_fill_service_lines(vbi, service_set);
310	return 0;
311}
312
313int vidioc_s_fmt_sliced_vbi_cap(struct file *file, void *priv, struct v4l2_format *fmt)
314{
315	struct vivid_dev *dev = video_drvdata(file);
316	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
317	int ret = vidioc_try_fmt_sliced_vbi_cap(file, priv, fmt);
318
319	if (ret)
320		return ret;
321	if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE && vb2_is_busy(&dev->vb_vbi_cap_q))
322		return -EBUSY;
323	dev->service_set_cap = vbi->service_set;
324	return 0;
325}
326
327int vidioc_g_sliced_vbi_cap(struct file *file, void *priv, struct v4l2_sliced_vbi_cap *cap)
328{
329	struct vivid_dev *dev = video_drvdata(file);
330	struct video_device *vdev = video_devdata(file);
331	bool is_60hz;
332
333	if (vdev->vfl_dir == VFL_DIR_RX) {
334		is_60hz = dev->std_cap[dev->input] & V4L2_STD_525_60;
335		if (!vivid_is_sdtv_cap(dev) || !dev->has_sliced_vbi_cap ||
336		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
337			return -EINVAL;
338	} else {
339		is_60hz = dev->std_out & V4L2_STD_525_60;
340		if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out ||
341		    cap->type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT)
342			return -EINVAL;
343	}
344
345	cap->service_set = is_60hz ? V4L2_SLICED_CAPTION_525 :
346				     V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
347	if (is_60hz) {
348		cap->service_lines[0][21] = V4L2_SLICED_CAPTION_525;
349		cap->service_lines[1][21] = V4L2_SLICED_CAPTION_525;
350	} else {
351		unsigned i;
352
353		for (i = 7; i <= 18; i++)
354			cap->service_lines[0][i] =
355			cap->service_lines[1][i] = V4L2_SLICED_TELETEXT_B;
356		cap->service_lines[0][23] = V4L2_SLICED_WSS_625;
357	}
358	return 0;
359}