vivid-vbi-out.c

  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
 18static 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	if (*nplanes)
 32		return sizes[0] < size ? -EINVAL : 0;
 33	sizes[0] = size;
 34
 35	*nplanes = 1;
 36	return 0;
 37}
 38
 39static int vbi_out_buf_prepare(struct vb2_buffer *vb)
 40{
 41	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 42	bool is_60hz = dev->std_out & V4L2_STD_525_60;
 43	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
 44		36 * sizeof(struct v4l2_sliced_vbi_data) :
 45		1440 * 2 * (is_60hz ? 12 : 18);
 46
 47	dprintk(dev, 1, "%s\n", __func__);
 48
 49	if (dev->buf_prepare_error) {
 50		/*
 51		 * Error injection: test what happens if buf_prepare() returns
 52		 * an error.
 53		 */
 54		dev->buf_prepare_error = false;
 55		return -EINVAL;
 56	}
 57	if (vb2_plane_size(vb, 0) < size) {
 58		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
 59				__func__, vb2_plane_size(vb, 0), size);
 60		return -EINVAL;
 61	}
 62	vb2_set_plane_payload(vb, 0, size);
 63
 64	return 0;
 65}
 66
 67static void vbi_out_buf_queue(struct vb2_buffer *vb)
 68{
 69	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 70	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 71	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
 72
 73	dprintk(dev, 1, "%s\n", __func__);
 74
 75	spin_lock(&dev->slock);
 76	list_add_tail(&buf->list, &dev->vbi_out_active);
 77	spin_unlock(&dev->slock);
 78}
 79
 80static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
 81{
 82	struct vivid_dev *dev = vb2_get_drv_priv(vq);
 83	int err;
 84
 85	dprintk(dev, 1, "%s\n", __func__);
 86	dev->vbi_out_seq_count = 0;
 87	if (dev->start_streaming_error) {
 88		dev->start_streaming_error = false;
 89		err = -EINVAL;
 90	} else {
 91		err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
 92	}
 93	if (err) {
 94		struct vivid_buffer *buf, *tmp;
 95
 96		list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
 97			list_del(&buf->list);
 98			vb2_buffer_done(&buf->vb.vb2_buf,
 99					VB2_BUF_STATE_QUEUED);
100		}
101	}
102	return err;
103}
104
105/* abort streaming and wait for last buffer */
106static void vbi_out_stop_streaming(struct vb2_queue *vq)
107{
108	struct vivid_dev *dev = vb2_get_drv_priv(vq);
109
110	dprintk(dev, 1, "%s\n", __func__);
111	vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
112	dev->vbi_out_have_wss = false;
113	dev->vbi_out_have_cc[0] = false;
114	dev->vbi_out_have_cc[1] = false;
115}
116
117static void vbi_out_buf_request_complete(struct vb2_buffer *vb)
118{
119	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
120
121	v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vbi_out);
122}
123
124const struct vb2_ops vivid_vbi_out_qops = {
125	.queue_setup		= vbi_out_queue_setup,
126	.buf_prepare		= vbi_out_buf_prepare,
127	.buf_queue		= vbi_out_buf_queue,
128	.start_streaming	= vbi_out_start_streaming,
129	.stop_streaming		= vbi_out_stop_streaming,
130	.buf_request_complete	= vbi_out_buf_request_complete,
131};
132
133int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
134					struct v4l2_format *f)
135{
136	struct vivid_dev *dev = video_drvdata(file);
137	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
138	bool is_60hz = dev->std_out & V4L2_STD_525_60;
139
140	if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
141		return -EINVAL;
142
143	vbi->sampling_rate = 25000000;
144	vbi->offset = 24;
145	vbi->samples_per_line = 1440;
146	vbi->sample_format = V4L2_PIX_FMT_GREY;
147	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
148	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
149	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
150	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
151	vbi->reserved[0] = 0;
152	vbi->reserved[1] = 0;
153	return 0;
154}
155
156int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
157					struct v4l2_format *f)
158{
159	struct vivid_dev *dev = video_drvdata(file);
160	int ret = vidioc_g_fmt_vbi_out(file, priv, f);
161
162	if (ret)
163		return ret;
164	if (vb2_is_busy(&dev->vb_vbi_out_q))
165		return -EBUSY;
166	dev->stream_sliced_vbi_out = false;
167	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
168	return 0;
169}
170
171int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *priv, struct v4l2_format *fmt)
172{
173	struct vivid_dev *dev = video_drvdata(file);
174	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
175
176	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
177		return -EINVAL;
178
179	vivid_fill_service_lines(vbi, dev->service_set_out);
180	return 0;
181}
182
183int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *priv, struct v4l2_format *fmt)
184{
185	struct vivid_dev *dev = video_drvdata(file);
186	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
187	bool is_60hz = dev->std_out & V4L2_STD_525_60;
188	u32 service_set = vbi->service_set;
189
190	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
191		return -EINVAL;
192
193	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
194				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
195	vivid_fill_service_lines(vbi, service_set);
196	return 0;
197}
198
199int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *priv,
200		struct v4l2_format *fmt)
201{
202	struct vivid_dev *dev = video_drvdata(file);
203	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
204	int ret = vidioc_try_fmt_sliced_vbi_out(file, priv, fmt);
205
206	if (ret)
207		return ret;
208	if (vb2_is_busy(&dev->vb_vbi_out_q))
209		return -EBUSY;
210	dev->service_set_out = vbi->service_set;
211	dev->stream_sliced_vbi_out = true;
212	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
213	return 0;
214}
215
216void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
217		struct vivid_buffer *buf)
218{
219	struct v4l2_sliced_vbi_data *vbi =
220		vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
221	unsigned elems =
222		vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
223
224	dev->vbi_out_have_cc[0] = false;
225	dev->vbi_out_have_cc[1] = false;
226	dev->vbi_out_have_wss = false;
227	while (elems--) {
228		switch (vbi->id) {
229		case V4L2_SLICED_CAPTION_525:
230			if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
231				dev->vbi_out_have_cc[!!vbi->field] = true;
232				dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
233				dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
234			}
235			break;
236		case V4L2_SLICED_WSS_625:
237			if ((dev->std_out & V4L2_STD_625_50) &&
238			    vbi->field == 0 && vbi->line == 23) {
239				dev->vbi_out_have_wss = true;
240				dev->vbi_out_wss[0] = vbi->data[0];
241				dev->vbi_out_wss[1] = vbi->data[1];
242			}
243			break;
244		}
245		vbi++;
246	}
247}