[media] media: imx: Add Capture Device Interface
This is the capture device interface driver that provides the v4l2 user interface. Frames can be received from various sources: - directly from CSI for capturing unconverted images directly from camera sensors. - from the IC pre-process encode task. - from the IC pre-process viewfinder task. Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Steve Longerbeam
Mauro Carvalho Chehab
parent
543933ee34
commit
64b5a49df4
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@ -3,3 +3,4 @@ imx-media-common-objs := imx-media-utils.o imx-media-fim.o
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obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media.o
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obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-common.o
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obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-capture.o
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@ -0,0 +1,702 @@
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/*
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* Video Capture Subdev for Freescale i.MX5/6 SOC
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*
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* Copyright (c) 2012-2016 Mentor Graphics Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-fwnode.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-mc.h>
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#include <media/v4l2-subdev.h>
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#include <media/videobuf2-dma-contig.h>
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#include <video/imx-ipu-v3.h>
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#include <media/imx.h>
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#include "imx-media.h"
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struct capture_priv {
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struct imx_media_video_dev vdev;
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struct v4l2_subdev *src_sd;
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int src_sd_pad;
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struct device *dev;
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struct imx_media_dev *md;
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struct media_pad vdev_pad;
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struct mutex mutex; /* capture device mutex */
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/* the videobuf2 queue */
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struct vb2_queue q;
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/* list of ready imx_media_buffer's from q */
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struct list_head ready_q;
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/* protect ready_q */
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spinlock_t q_lock;
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/* controls inherited from subdevs */
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struct v4l2_ctrl_handler ctrl_hdlr;
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/* misc status */
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bool stop; /* streaming is stopping */
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};
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#define to_capture_priv(v) container_of(v, struct capture_priv, vdev)
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/* In bytes, per queue */
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#define VID_MEM_LIMIT SZ_64M
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static struct vb2_ops capture_qops;
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/*
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* Video ioctls follow
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*/
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static int vidioc_querycap(struct file *file, void *fh,
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struct v4l2_capability *cap)
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{
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struct capture_priv *priv = video_drvdata(file);
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strncpy(cap->driver, "imx-media-capture", sizeof(cap->driver) - 1);
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strncpy(cap->card, "imx-media-capture", sizeof(cap->card) - 1);
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snprintf(cap->bus_info, sizeof(cap->bus_info),
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"platform:%s", priv->src_sd->name);
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return 0;
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}
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static int capture_enum_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_fmtdesc *f)
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{
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struct capture_priv *priv = video_drvdata(file);
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const struct imx_media_pixfmt *cc_src;
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struct v4l2_subdev_format fmt_src;
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u32 fourcc;
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int ret;
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fmt_src.pad = priv->src_sd_pad;
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fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
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ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
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if (ret) {
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v4l2_err(priv->src_sd, "failed to get src_sd format\n");
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return ret;
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}
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cc_src = imx_media_find_ipu_format(fmt_src.format.code, CS_SEL_ANY);
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if (!cc_src)
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cc_src = imx_media_find_mbus_format(fmt_src.format.code,
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CS_SEL_ANY, true);
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if (!cc_src)
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return -EINVAL;
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if (cc_src->bayer) {
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if (f->index != 0)
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return -EINVAL;
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fourcc = cc_src->fourcc;
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} else {
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u32 cs_sel = (cc_src->cs == IPUV3_COLORSPACE_YUV) ?
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CS_SEL_YUV : CS_SEL_RGB;
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ret = imx_media_enum_format(&fourcc, f->index, cs_sel);
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if (ret)
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return ret;
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}
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f->pixelformat = fourcc;
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return 0;
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}
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static int capture_g_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct capture_priv *priv = video_drvdata(file);
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*f = priv->vdev.fmt;
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return 0;
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}
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static int capture_try_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct capture_priv *priv = video_drvdata(file);
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struct v4l2_subdev_format fmt_src;
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const struct imx_media_pixfmt *cc, *cc_src;
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int ret;
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fmt_src.pad = priv->src_sd_pad;
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fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
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ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src);
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if (ret)
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return ret;
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cc_src = imx_media_find_ipu_format(fmt_src.format.code, CS_SEL_ANY);
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if (!cc_src)
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cc_src = imx_media_find_mbus_format(fmt_src.format.code,
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CS_SEL_ANY, true);
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if (!cc_src)
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return -EINVAL;
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if (cc_src->bayer) {
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cc = cc_src;
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} else {
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u32 fourcc, cs_sel;
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cs_sel = (cc_src->cs == IPUV3_COLORSPACE_YUV) ?
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CS_SEL_YUV : CS_SEL_RGB;
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fourcc = f->fmt.pix.pixelformat;
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cc = imx_media_find_format(fourcc, cs_sel, false);
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if (!cc) {
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imx_media_enum_format(&fourcc, 0, cs_sel);
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cc = imx_media_find_format(fourcc, cs_sel, false);
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}
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}
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imx_media_mbus_fmt_to_pix_fmt(&f->fmt.pix, &fmt_src.format, cc);
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return 0;
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}
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static int capture_s_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct capture_priv *priv = video_drvdata(file);
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int ret;
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if (vb2_is_busy(&priv->q)) {
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v4l2_err(priv->src_sd, "%s queue busy\n", __func__);
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return -EBUSY;
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}
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ret = capture_try_fmt_vid_cap(file, priv, f);
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if (ret)
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return ret;
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priv->vdev.fmt.fmt.pix = f->fmt.pix;
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priv->vdev.cc = imx_media_find_format(f->fmt.pix.pixelformat,
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CS_SEL_ANY, true);
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return 0;
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}
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static int capture_querystd(struct file *file, void *fh, v4l2_std_id *std)
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{
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struct capture_priv *priv = video_drvdata(file);
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return v4l2_subdev_call(priv->src_sd, video, querystd, std);
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}
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static int capture_g_std(struct file *file, void *fh, v4l2_std_id *std)
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{
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struct capture_priv *priv = video_drvdata(file);
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return v4l2_subdev_call(priv->src_sd, video, g_std, std);
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}
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static int capture_s_std(struct file *file, void *fh, v4l2_std_id std)
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{
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struct capture_priv *priv = video_drvdata(file);
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if (vb2_is_busy(&priv->q))
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return -EBUSY;
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return v4l2_subdev_call(priv->src_sd, video, s_std, std);
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}
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static int capture_g_parm(struct file *file, void *fh,
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struct v4l2_streamparm *a)
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{
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struct capture_priv *priv = video_drvdata(file);
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struct v4l2_subdev_frame_interval fi;
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int ret;
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if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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memset(&fi, 0, sizeof(fi));
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fi.pad = priv->src_sd_pad;
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ret = v4l2_subdev_call(priv->src_sd, video, g_frame_interval, &fi);
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if (ret < 0)
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return ret;
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a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
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a->parm.capture.timeperframe = fi.interval;
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return 0;
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}
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static int capture_s_parm(struct file *file, void *fh,
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struct v4l2_streamparm *a)
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{
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struct capture_priv *priv = video_drvdata(file);
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struct v4l2_subdev_frame_interval fi;
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int ret;
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if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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memset(&fi, 0, sizeof(fi));
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fi.pad = priv->src_sd_pad;
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fi.interval = a->parm.capture.timeperframe;
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ret = v4l2_subdev_call(priv->src_sd, video, s_frame_interval, &fi);
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if (ret < 0)
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return ret;
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a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
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a->parm.capture.timeperframe = fi.interval;
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return 0;
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}
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static const struct v4l2_ioctl_ops capture_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_enum_fmt_vid_cap = capture_enum_fmt_vid_cap,
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.vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap,
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.vidioc_try_fmt_vid_cap = capture_try_fmt_vid_cap,
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.vidioc_s_fmt_vid_cap = capture_s_fmt_vid_cap,
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.vidioc_querystd = capture_querystd,
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.vidioc_g_std = capture_g_std,
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.vidioc_s_std = capture_s_std,
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.vidioc_g_parm = capture_g_parm,
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.vidioc_s_parm = capture_s_parm,
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.vidioc_reqbufs = vb2_ioctl_reqbufs,
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.vidioc_create_bufs = vb2_ioctl_create_bufs,
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.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
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.vidioc_querybuf = vb2_ioctl_querybuf,
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.vidioc_qbuf = vb2_ioctl_qbuf,
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.vidioc_dqbuf = vb2_ioctl_dqbuf,
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.vidioc_expbuf = vb2_ioctl_expbuf,
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.vidioc_streamon = vb2_ioctl_streamon,
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.vidioc_streamoff = vb2_ioctl_streamoff,
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};
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/*
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* Queue operations
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*/
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static int capture_queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers,
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unsigned int *nplanes,
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unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct capture_priv *priv = vb2_get_drv_priv(vq);
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struct v4l2_pix_format *pix = &priv->vdev.fmt.fmt.pix;
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unsigned int count = *nbuffers;
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if (vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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if (*nplanes) {
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if (*nplanes != 1 || sizes[0] < pix->sizeimage)
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return -EINVAL;
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count += vq->num_buffers;
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}
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count = min_t(__u32, VID_MEM_LIMIT / pix->sizeimage, count);
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if (*nplanes)
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*nbuffers = (count < vq->num_buffers) ? 0 :
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count - vq->num_buffers;
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else
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*nbuffers = count;
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*nplanes = 1;
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sizes[0] = pix->sizeimage;
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return 0;
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}
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static int capture_buf_init(struct vb2_buffer *vb)
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{
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struct imx_media_buffer *buf = to_imx_media_vb(vb);
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INIT_LIST_HEAD(&buf->list);
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return 0;
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}
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static int capture_buf_prepare(struct vb2_buffer *vb)
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{
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struct vb2_queue *vq = vb->vb2_queue;
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struct capture_priv *priv = vb2_get_drv_priv(vq);
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struct v4l2_pix_format *pix = &priv->vdev.fmt.fmt.pix;
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if (vb2_plane_size(vb, 0) < pix->sizeimage) {
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v4l2_err(priv->src_sd,
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"data will not fit into plane (%lu < %lu)\n",
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vb2_plane_size(vb, 0), (long)pix->sizeimage);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, pix->sizeimage);
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return 0;
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}
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static void capture_buf_queue(struct vb2_buffer *vb)
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{
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struct capture_priv *priv = vb2_get_drv_priv(vb->vb2_queue);
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struct imx_media_buffer *buf = to_imx_media_vb(vb);
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unsigned long flags;
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spin_lock_irqsave(&priv->q_lock, flags);
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list_add_tail(&buf->list, &priv->ready_q);
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spin_unlock_irqrestore(&priv->q_lock, flags);
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}
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static int capture_start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct capture_priv *priv = vb2_get_drv_priv(vq);
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struct imx_media_buffer *buf, *tmp;
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unsigned long flags;
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int ret;
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if (vb2_is_streaming(vq))
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return 0;
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ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
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true);
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if (ret) {
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v4l2_err(priv->src_sd, "pipeline start failed with %d\n", ret);
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goto return_bufs;
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}
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priv->stop = false;
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return 0;
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return_bufs:
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spin_lock_irqsave(&priv->q_lock, flags);
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list_for_each_entry_safe(buf, tmp, &priv->ready_q, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED);
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}
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spin_unlock_irqrestore(&priv->q_lock, flags);
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return ret;
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}
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static void capture_stop_streaming(struct vb2_queue *vq)
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{
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struct capture_priv *priv = vb2_get_drv_priv(vq);
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struct imx_media_buffer *frame;
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unsigned long flags;
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int ret;
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if (!vb2_is_streaming(vq))
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return;
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spin_lock_irqsave(&priv->q_lock, flags);
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priv->stop = true;
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spin_unlock_irqrestore(&priv->q_lock, flags);
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ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity,
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false);
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if (ret)
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v4l2_warn(priv->src_sd, "pipeline stop failed with %d\n", ret);
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/* release all active buffers */
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spin_lock_irqsave(&priv->q_lock, flags);
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while (!list_empty(&priv->ready_q)) {
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frame = list_entry(priv->ready_q.next,
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struct imx_media_buffer, list);
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list_del(&frame->list);
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vb2_buffer_done(&frame->vbuf.vb2_buf, VB2_BUF_STATE_ERROR);
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}
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spin_unlock_irqrestore(&priv->q_lock, flags);
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}
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static struct vb2_ops capture_qops = {
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.queue_setup = capture_queue_setup,
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.buf_init = capture_buf_init,
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.buf_prepare = capture_buf_prepare,
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.buf_queue = capture_buf_queue,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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.start_streaming = capture_start_streaming,
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.stop_streaming = capture_stop_streaming,
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};
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/*
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* File operations
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*/
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static int capture_open(struct file *file)
|
||||
{
|
||||
struct capture_priv *priv = video_drvdata(file);
|
||||
struct video_device *vfd = priv->vdev.vfd;
|
||||
int ret;
|
||||
|
||||
if (mutex_lock_interruptible(&priv->mutex))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
ret = v4l2_fh_open(file);
|
||||
if (ret)
|
||||
v4l2_err(priv->src_sd, "v4l2_fh_open failed\n");
|
||||
|
||||
ret = v4l2_pipeline_pm_use(&vfd->entity, 1);
|
||||
if (ret)
|
||||
v4l2_fh_release(file);
|
||||
|
||||
mutex_unlock(&priv->mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int capture_release(struct file *file)
|
||||
{
|
||||
struct capture_priv *priv = video_drvdata(file);
|
||||
struct video_device *vfd = priv->vdev.vfd;
|
||||
struct vb2_queue *vq = &priv->q;
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&priv->mutex);
|
||||
|
||||
if (file->private_data == vq->owner) {
|
||||
vb2_queue_release(vq);
|
||||
vq->owner = NULL;
|
||||
}
|
||||
|
||||
v4l2_pipeline_pm_use(&vfd->entity, 0);
|
||||
|
||||
v4l2_fh_release(file);
|
||||
mutex_unlock(&priv->mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct v4l2_file_operations capture_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = capture_open,
|
||||
.release = capture_release,
|
||||
.poll = vb2_fop_poll,
|
||||
.unlocked_ioctl = video_ioctl2,
|
||||
.mmap = vb2_fop_mmap,
|
||||
};
|
||||
|
||||
static struct video_device capture_videodev = {
|
||||
.fops = &capture_fops,
|
||||
.ioctl_ops = &capture_ioctl_ops,
|
||||
.minor = -1,
|
||||
.release = video_device_release,
|
||||
.vfl_dir = VFL_DIR_RX,
|
||||
.tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM,
|
||||
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING,
|
||||
};
|
||||
|
||||
void imx_media_capture_device_set_format(struct imx_media_video_dev *vdev,
|
||||
struct v4l2_pix_format *pix)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
|
||||
mutex_lock(&priv->mutex);
|
||||
priv->vdev.fmt.fmt.pix = *pix;
|
||||
priv->vdev.cc = imx_media_find_format(pix->pixelformat, CS_SEL_ANY,
|
||||
true);
|
||||
mutex_unlock(&priv->mutex);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_set_format);
|
||||
|
||||
struct imx_media_buffer *
|
||||
imx_media_capture_device_next_buf(struct imx_media_video_dev *vdev)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
struct imx_media_buffer *buf = NULL;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&priv->q_lock, flags);
|
||||
|
||||
/* get next queued buffer */
|
||||
if (!list_empty(&priv->ready_q)) {
|
||||
buf = list_entry(priv->ready_q.next, struct imx_media_buffer,
|
||||
list);
|
||||
list_del(&buf->list);
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&priv->q_lock, flags);
|
||||
|
||||
return buf;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_next_buf);
|
||||
|
||||
void imx_media_capture_device_error(struct imx_media_video_dev *vdev)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
struct vb2_queue *vq = &priv->q;
|
||||
unsigned long flags;
|
||||
|
||||
if (!vb2_is_streaming(vq))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&priv->q_lock, flags);
|
||||
vb2_queue_error(vq);
|
||||
spin_unlock_irqrestore(&priv->q_lock, flags);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_error);
|
||||
|
||||
int imx_media_capture_device_register(struct imx_media_video_dev *vdev)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
struct v4l2_subdev *sd = priv->src_sd;
|
||||
struct video_device *vfd = vdev->vfd;
|
||||
struct vb2_queue *vq = &priv->q;
|
||||
struct v4l2_subdev_format fmt_src;
|
||||
int ret;
|
||||
|
||||
/* get media device */
|
||||
priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
|
||||
|
||||
vfd->v4l2_dev = sd->v4l2_dev;
|
||||
|
||||
ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
|
||||
if (ret) {
|
||||
v4l2_err(sd, "Failed to register video device\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
vq->io_modes = VB2_MMAP | VB2_DMABUF;
|
||||
vq->drv_priv = priv;
|
||||
vq->buf_struct_size = sizeof(struct imx_media_buffer);
|
||||
vq->ops = &capture_qops;
|
||||
vq->mem_ops = &vb2_dma_contig_memops;
|
||||
vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
||||
vq->lock = &priv->mutex;
|
||||
vq->min_buffers_needed = 2;
|
||||
vq->dev = priv->dev;
|
||||
|
||||
ret = vb2_queue_init(vq);
|
||||
if (ret) {
|
||||
v4l2_err(sd, "vb2_queue_init failed\n");
|
||||
goto unreg;
|
||||
}
|
||||
|
||||
INIT_LIST_HEAD(&priv->ready_q);
|
||||
|
||||
priv->vdev_pad.flags = MEDIA_PAD_FL_SINK;
|
||||
ret = media_entity_pads_init(&vfd->entity, 1, &priv->vdev_pad);
|
||||
if (ret) {
|
||||
v4l2_err(sd, "failed to init dev pad\n");
|
||||
goto unreg;
|
||||
}
|
||||
|
||||
/* create the link from the src_sd devnode pad to device node */
|
||||
ret = media_create_pad_link(&sd->entity, priv->src_sd_pad,
|
||||
&vfd->entity, 0, 0);
|
||||
if (ret) {
|
||||
v4l2_err(sd, "failed to create link to device node\n");
|
||||
goto unreg;
|
||||
}
|
||||
|
||||
/* setup default format */
|
||||
fmt_src.pad = priv->src_sd_pad;
|
||||
fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE;
|
||||
v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt_src);
|
||||
if (ret) {
|
||||
v4l2_err(sd, "failed to get src_sd format\n");
|
||||
goto unreg;
|
||||
}
|
||||
|
||||
vdev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt.fmt.pix,
|
||||
&fmt_src.format, NULL);
|
||||
vdev->cc = imx_media_find_format(vdev->fmt.fmt.pix.pixelformat,
|
||||
CS_SEL_ANY, false);
|
||||
|
||||
v4l2_info(sd, "Registered %s as /dev/%s\n", vfd->name,
|
||||
video_device_node_name(vfd));
|
||||
|
||||
vfd->ctrl_handler = &priv->ctrl_hdlr;
|
||||
|
||||
return 0;
|
||||
unreg:
|
||||
video_unregister_device(vfd);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_register);
|
||||
|
||||
void imx_media_capture_device_unregister(struct imx_media_video_dev *vdev)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
struct video_device *vfd = priv->vdev.vfd;
|
||||
|
||||
mutex_lock(&priv->mutex);
|
||||
|
||||
if (video_is_registered(vfd)) {
|
||||
video_unregister_device(vfd);
|
||||
media_entity_cleanup(&vfd->entity);
|
||||
}
|
||||
|
||||
mutex_unlock(&priv->mutex);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister);
|
||||
|
||||
struct imx_media_video_dev *
|
||||
imx_media_capture_device_init(struct v4l2_subdev *src_sd, int pad)
|
||||
{
|
||||
struct capture_priv *priv;
|
||||
struct video_device *vfd;
|
||||
|
||||
priv = devm_kzalloc(src_sd->dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
priv->src_sd = src_sd;
|
||||
priv->src_sd_pad = pad;
|
||||
priv->dev = src_sd->dev;
|
||||
|
||||
mutex_init(&priv->mutex);
|
||||
spin_lock_init(&priv->q_lock);
|
||||
|
||||
snprintf(capture_videodev.name, sizeof(capture_videodev.name),
|
||||
"%s capture", src_sd->name);
|
||||
|
||||
vfd = video_device_alloc();
|
||||
if (!vfd)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
*vfd = capture_videodev;
|
||||
vfd->lock = &priv->mutex;
|
||||
vfd->queue = &priv->q;
|
||||
priv->vdev.vfd = vfd;
|
||||
|
||||
video_set_drvdata(vfd, priv);
|
||||
|
||||
v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
|
||||
|
||||
return &priv->vdev;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_init);
|
||||
|
||||
void imx_media_capture_device_remove(struct imx_media_video_dev *vdev)
|
||||
{
|
||||
struct capture_priv *priv = to_capture_priv(vdev);
|
||||
|
||||
v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_media_capture_device_remove);
|
||||
|
||||
MODULE_DESCRIPTION("i.MX5/6 v4l2 video capture interface driver");
|
||||
MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue