drivers/media/platform/vivid/vivid-vbi-out.c - kernel/lockdown - Git at Google

 /*
  * vivid-vbi-out.c - vbi output support functions.
  *
  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
  *
  * This program is free software; you may redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; version 2 of the License.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */

 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>

 #include "vivid-core.h"
 #include "vivid-kthread-out.h"
 #include "vivid-vbi-out.h"
 #include "vivid-vbi-cap.h"

 static int vbi_out_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 		       unsigned *nbuffers, unsigned *nplanes,
 		       unsigned sizes[], void *alloc_ctxs[])
 {
 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
 	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
 		36 * sizeof(struct v4l2_sliced_vbi_data) :
 		1440 * 2 * (is_60hz ? 12 : 18);

 	if (!vivid_is_svid_out(dev))
 		return -EINVAL;

 	sizes[0] = size;

 	if (vq->num_buffers + *nbuffers < 2)
 		*nbuffers = 2 - vq->num_buffers;

 	*nplanes = 1;
 	return 0;
 }

 static int vbi_out_buf_prepare(struct vb2_buffer *vb)
 {
 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
 	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
 		36 * sizeof(struct v4l2_sliced_vbi_data) :
 		1440 * 2 * (is_60hz ? 12 : 18);

 	dprintk(dev, 1, "%s\n", __func__);

 	if (dev->buf_prepare_error) {
 		/*
 		 * Error injection: test what happens if buf_prepare() returns
 		 * an error.
 		 */
 		dev->buf_prepare_error = false;
 		return -EINVAL;
 	}
 	if (vb2_plane_size(vb, 0) < size) {
 		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
 				__func__, vb2_plane_size(vb, 0), size);
 		return -EINVAL;
 	}
 	vb2_set_plane_payload(vb, 0, size);

 	return 0;
 }

 static void vbi_out_buf_queue(struct vb2_buffer *vb)
 {
 	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 	struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);

 	dprintk(dev, 1, "%s\n", __func__);

 	spin_lock(&dev->slock);
 	list_add_tail(&buf->list, &dev->vbi_out_active);
 	spin_unlock(&dev->slock);
 }

 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
 {
 	struct vivid_dev *dev = vb2_get_drv_priv(vq);
 	int err;

 	dprintk(dev, 1, "%s\n", __func__);
 	dev->vbi_out_seq_count = 0;
 	if (dev->start_streaming_error) {
 		dev->start_streaming_error = false;
 		err = -EINVAL;
 	} else {
 		err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
 	}
 	if (err) {
 		struct vivid_buffer *buf, *tmp;

 		list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
 			list_del(&buf->list);
 			vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 		}
 	}
 	return err;
 }

 /* abort streaming and wait for last buffer */
 static void vbi_out_stop_streaming(struct vb2_queue *vq)
 {
 	struct vivid_dev *dev = vb2_get_drv_priv(vq);

 	dprintk(dev, 1, "%s\n", __func__);
 	vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
 	dev->vbi_out_have_wss = false;
 	dev->vbi_out_have_cc[0] = false;
 	dev->vbi_out_have_cc[1] = false;
 }

 const struct vb2_ops vivid_vbi_out_qops = {
 	.queue_setup		= vbi_out_queue_setup,
 	.buf_prepare		= vbi_out_buf_prepare,
 	.buf_queue		= vbi_out_buf_queue,
 	.start_streaming	= vbi_out_start_streaming,
 	.stop_streaming		= vbi_out_stop_streaming,
 	.wait_prepare		= vb2_ops_wait_prepare,
 	.wait_finish		= vb2_ops_wait_finish,
 };

 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
 					struct v4l2_format *f)
 {
 	struct vivid_dev *dev = video_drvdata(file);
 	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
 	bool is_60hz = dev->std_out & V4L2_STD_525_60;

 	if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
 		return -EINVAL;

 	vbi->sampling_rate = 25000000;
 	vbi->offset = 24;
 	vbi->samples_per_line = 1440;
 	vbi->sample_format = V4L2_PIX_FMT_GREY;
 	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
 	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
 	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
 	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
 	vbi->reserved[0] = 0;
 	vbi->reserved[1] = 0;
 	return 0;
 }

 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
 					struct v4l2_format *f)
 {
 	struct vivid_dev *dev = video_drvdata(file);
 	int ret = vidioc_g_fmt_vbi_out(file, priv, f);

 	if (ret)
 		return ret;
 	if (vb2_is_busy(&dev->vb_vbi_out_q))
 		return -EBUSY;
 	dev->stream_sliced_vbi_out = false;
 	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
 	return 0;
 }

 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 {
 	struct vivid_dev *dev = video_drvdata(file);
 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;

 	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 		return -EINVAL;

 	vivid_fill_service_lines(vbi, dev->service_set_out);
 	return 0;
 }

 int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 {
 	struct vivid_dev *dev = video_drvdata(file);
 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 	bool is_60hz = dev->std_out & V4L2_STD_525_60;
 	u32 service_set = vbi->service_set;

 	if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 		return -EINVAL;

 	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
 				 V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
 	vivid_fill_service_lines(vbi, service_set);
 	return 0;
 }

 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 {
 	struct vivid_dev *dev = video_drvdata(file);
 	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 	int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);

 	if (ret)
 		return ret;
 	if (vb2_is_busy(&dev->vb_vbi_out_q))
 		return -EBUSY;
 	dev->service_set_out = vbi->service_set;
 	dev->stream_sliced_vbi_out = true;
 	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
 	return 0;
 }

 void vivid_sliced_vbi_out_process(struct vivid_dev *dev, struct vivid_buffer *buf)
 {
 	struct v4l2_sliced_vbi_data *vbi = vb2_plane_vaddr(&buf->vb, 0);
 	unsigned elems = vb2_get_plane_payload(&buf->vb, 0) / sizeof(*vbi);

 	dev->vbi_out_have_cc[0] = false;
 	dev->vbi_out_have_cc[1] = false;
 	dev->vbi_out_have_wss = false;
 	while (elems--) {
 		switch (vbi->id) {
 		case V4L2_SLICED_CAPTION_525:
 			if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
 				dev->vbi_out_have_cc[!!vbi->field] = true;
 				dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
 				dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
 			}
 			break;
 		case V4L2_SLICED_WSS_625:
 			if ((dev->std_out & V4L2_STD_625_50) &&
 			    vbi->field == 0 && vbi->line == 23) {
 				dev->vbi_out_have_wss = true;
 				dev->vbi_out_wss[0] = vbi->data[0];
 				dev->vbi_out_wss[1] = vbi->data[1];
 			}
 			break;
 		}
 		vbi++;
 	}
 }
	/*
	* vivid-vbi-out.c - vbi output support functions.
	*
	* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
	*
	* This program is free software; you may redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; version 2 of the License.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*/

	#include <linux/errno.h>
	#include <linux/kernel.h>
	#include <linux/videodev2.h>
	#include <media/v4l2-common.h>

	#include "vivid-core.h"
	#include "vivid-kthread-out.h"
	#include "vivid-vbi-out.h"
	#include "vivid-vbi-cap.h"

	static int vbi_out_queue_setup(struct vb2_queue vq, const struct v4l2_format fmt,
	unsigned nbuffers, unsigned nplanes,
	unsigned sizes[], void *alloc_ctxs[])
	{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
	36 * sizeof(struct v4l2_sliced_vbi_data) :
	1440 * 2 * (is_60hz ? 12 : 18);

	if (!vivid_is_svid_out(dev))
	return -EINVAL;

	sizes[0] = size;

	if (vq->num_buffers + *nbuffers < 2)
	*nbuffers = 2 - vq->num_buffers;

	*nplanes = 1;
	return 0;
	}

	static int vbi_out_buf_prepare(struct vb2_buffer *vb)
	{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
	36 * sizeof(struct v4l2_sliced_vbi_data) :
	1440 * 2 * (is_60hz ? 12 : 18);

	dprintk(dev, 1, "%s\n", __func__);

	if (dev->buf_prepare_error) {
	/*
	* Error injection: test what happens if buf_prepare() returns
	* an error.
	*/
	dev->buf_prepare_error = false;
	return -EINVAL;
	}
	if (vb2_plane_size(vb, 0) < size) {
	dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
	__func__, vb2_plane_size(vb, 0), size);
	return -EINVAL;
	}
	vb2_set_plane_payload(vb, 0, size);

	return 0;
	}

	static void vbi_out_buf_queue(struct vb2_buffer *vb)
	{
	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);

	dprintk(dev, 1, "%s\n", __func__);

	spin_lock(&dev->slock);
	list_add_tail(&buf->list, &dev->vbi_out_active);
	spin_unlock(&dev->slock);
	}

	static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
	{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);
	int err;

	dprintk(dev, 1, "%s\n", __func__);
	dev->vbi_out_seq_count = 0;
	if (dev->start_streaming_error) {
	dev->start_streaming_error = false;
	err = -EINVAL;
	} else {
	err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
	}
	if (err) {
	struct vivid_buffer buf, tmp;

	list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
	list_del(&buf->list);
	vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
	}
	}
	return err;
	}

	/* abort streaming and wait for last buffer */
	static void vbi_out_stop_streaming(struct vb2_queue *vq)
	{
	struct vivid_dev *dev = vb2_get_drv_priv(vq);

	dprintk(dev, 1, "%s\n", __func__);
	vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
	dev->vbi_out_have_wss = false;
	dev->vbi_out_have_cc[0] = false;
	dev->vbi_out_have_cc[1] = false;
	}

	const struct vb2_ops vivid_vbi_out_qops = {
	.queue_setup = vbi_out_queue_setup,
	.buf_prepare = vbi_out_buf_prepare,
	.buf_queue = vbi_out_buf_queue,
	.start_streaming = vbi_out_start_streaming,
	.stop_streaming = vbi_out_stop_streaming,
	.wait_prepare = vb2_ops_wait_prepare,
	.wait_finish = vb2_ops_wait_finish,
	};

	int vidioc_g_fmt_vbi_out(struct file file, void priv,
	struct v4l2_format *f)
	{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_vbi_format *vbi = &f->fmt.vbi;
	bool is_60hz = dev->std_out & V4L2_STD_525_60;

	if (!vivid_is_svid_out(dev) \|\| !dev->has_raw_vbi_out)
	return -EINVAL;

	vbi->sampling_rate = 25000000;
	vbi->offset = 24;
	vbi->samples_per_line = 1440;
	vbi->sample_format = V4L2_PIX_FMT_GREY;
	vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
	vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
	vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
	vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
	vbi->reserved[0] = 0;
	vbi->reserved[1] = 0;
	return 0;
	}

	int vidioc_s_fmt_vbi_out(struct file file, void priv,
	struct v4l2_format *f)
	{
	struct vivid_dev *dev = video_drvdata(file);
	int ret = vidioc_g_fmt_vbi_out(file, priv, f);

	if (ret)
	return ret;
	if (vb2_is_busy(&dev->vb_vbi_out_q))
	return -EBUSY;
	dev->stream_sliced_vbi_out = false;
	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
	return 0;
	}

	int vidioc_g_fmt_sliced_vbi_out(struct file file, void fh, struct v4l2_format *fmt)
	{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;

	if (!vivid_is_svid_out(dev) \|\| !dev->has_sliced_vbi_out)
	return -EINVAL;

	vivid_fill_service_lines(vbi, dev->service_set_out);
	return 0;
	}

	int vidioc_try_fmt_sliced_vbi_out(struct file file, void fh, struct v4l2_format *fmt)
	{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
	bool is_60hz = dev->std_out & V4L2_STD_525_60;
	u32 service_set = vbi->service_set;

	if (!vivid_is_svid_out(dev) \|\| !dev->has_sliced_vbi_out)
	return -EINVAL;

	service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
	V4L2_SLICED_WSS_625 \| V4L2_SLICED_TELETEXT_B;
	vivid_fill_service_lines(vbi, service_set);
	return 0;
	}

	int vidioc_s_fmt_sliced_vbi_out(struct file file, void fh, struct v4l2_format *fmt)
	{
	struct vivid_dev *dev = video_drvdata(file);
	struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
	int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);

	if (ret)
	return ret;
	if (vb2_is_busy(&dev->vb_vbi_out_q))
	return -EBUSY;
	dev->service_set_out = vbi->service_set;
	dev->stream_sliced_vbi_out = true;
	dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
	return 0;
	}

	void vivid_sliced_vbi_out_process(struct vivid_dev dev, struct vivid_buffer buf)
	{
	struct v4l2_sliced_vbi_data *vbi = vb2_plane_vaddr(&buf->vb, 0);
	unsigned elems = vb2_get_plane_payload(&buf->vb, 0) / sizeof(*vbi);

	dev->vbi_out_have_cc[0] = false;
	dev->vbi_out_have_cc[1] = false;
	dev->vbi_out_have_wss = false;
	while (elems--) {
	switch (vbi->id) {
	case V4L2_SLICED_CAPTION_525:
	if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
	dev->vbi_out_have_cc[!!vbi->field] = true;
	dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
	dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
	}
	break;
	case V4L2_SLICED_WSS_625:
	if ((dev->std_out & V4L2_STD_625_50) &&
	vbi->field == 0 && vbi->line == 23) {
	dev->vbi_out_have_wss = true;
	dev->vbi_out_wss[0] = vbi->data[0];
	dev->vbi_out_wss[1] = vbi->data[1];
	}
	break;
	}
	vbi++;
	}
	}