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1// SPDX-License-Identifier: GPL-2.0-only2/*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() returns52		 * 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	.wait_prepare		= vb2_ops_wait_prepare,132	.wait_finish		= vb2_ops_wait_finish,133};134 135int vidioc_g_fmt_vbi_out(struct file *file, void *priv,136					struct v4l2_format *f)137{138	struct vivid_dev *dev = video_drvdata(file);139	struct v4l2_vbi_format *vbi = &f->fmt.vbi;140	bool is_60hz = dev->std_out & V4L2_STD_525_60;141 142	if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)143		return -EINVAL;144 145	vbi->sampling_rate = 25000000;146	vbi->offset = 24;147	vbi->samples_per_line = 1440;148	vbi->sample_format = V4L2_PIX_FMT_GREY;149	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;150	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;151	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;152	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;153	vbi->reserved[0] = 0;154	vbi->reserved[1] = 0;155	return 0;156}157 158int vidioc_s_fmt_vbi_out(struct file *file, void *priv,159					struct v4l2_format *f)160{161	struct vivid_dev *dev = video_drvdata(file);162	int ret = vidioc_g_fmt_vbi_out(file, priv, f);163 164	if (ret)165		return ret;166	if (vb2_is_busy(&dev->vb_vbi_out_q))167		return -EBUSY;168	dev->stream_sliced_vbi_out = false;169	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;170	return 0;171}172 173int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)174{175	struct vivid_dev *dev = video_drvdata(file);176	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;177 178	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)179		return -EINVAL;180 181	vivid_fill_service_lines(vbi, dev->service_set_out);182	return 0;183}184 185int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)186{187	struct vivid_dev *dev = video_drvdata(file);188	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;189	bool is_60hz = dev->std_out & V4L2_STD_525_60;190	u32 service_set = vbi->service_set;191 192	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)193		return -EINVAL;194 195	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :196				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;197	vivid_fill_service_lines(vbi, service_set);198	return 0;199}200 201int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,202		struct v4l2_format *fmt)203{204	struct vivid_dev *dev = video_drvdata(file);205	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;206	int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);207 208	if (ret)209		return ret;210	if (vb2_is_busy(&dev->vb_vbi_out_q))211		return -EBUSY;212	dev->service_set_out = vbi->service_set;213	dev->stream_sliced_vbi_out = true;214	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;215	return 0;216}217 218void vivid_sliced_vbi_out_process(struct vivid_dev *dev,219		struct vivid_buffer *buf)220{221	struct v4l2_sliced_vbi_data *vbi =222		vb2_plane_vaddr(&buf->vb.vb2_buf, 0);223	unsigned elems =224		vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);225 226	dev->vbi_out_have_cc[0] = false;227	dev->vbi_out_have_cc[1] = false;228	dev->vbi_out_have_wss = false;229	while (elems--) {230		switch (vbi->id) {231		case V4L2_SLICED_CAPTION_525:232			if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {233				dev->vbi_out_have_cc[!!vbi->field] = true;234				dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];235				dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];236			}237			break;238		case V4L2_SLICED_WSS_625:239			if ((dev->std_out & V4L2_STD_625_50) &&240			    vbi->field == 0 && vbi->line == 23) {241				dev->vbi_out_have_wss = true;242				dev->vbi_out_wss[0] = vbi->data[0];243				dev->vbi_out_wss[1] = vbi->data[1];244			}245			break;246		}247		vbi++;248	}249}250