edbaa39842
Create a debugfs entry per UVC stream. This will be used to export stream statistics. Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [mchehab@redhat.com: add incude <linux/module.h> to avoid compilation breakage] Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/*
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* uvc_debugfs.c -- USB Video Class driver - Debugging support
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*
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* Copyright (C) 2011
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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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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*/
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include "uvcvideo.h"
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/* -----------------------------------------------------------------------------
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* Global and stream initialization/cleanup
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*/
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static struct dentry *uvc_debugfs_root_dir;
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int uvc_debugfs_init_stream(struct uvc_streaming *stream)
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{
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struct usb_device *udev = stream->dev->udev;
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struct dentry *dent;
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char dir_name[32];
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if (uvc_debugfs_root_dir == NULL)
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return -ENODEV;
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sprintf(dir_name, "%u-%u", udev->bus->busnum, udev->devnum);
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dent = debugfs_create_dir(dir_name, uvc_debugfs_root_dir);
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if (IS_ERR_OR_NULL(dent)) {
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uvc_printk(KERN_INFO, "Unable to create debugfs %s directory.\n",
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dir_name);
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return -ENODEV;
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}
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stream->debugfs_dir = dent;
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return 0;
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}
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void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream)
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{
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if (stream->debugfs_dir == NULL)
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return;
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debugfs_remove_recursive(stream->debugfs_dir);
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stream->debugfs_dir = NULL;
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}
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int uvc_debugfs_init(void)
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{
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struct dentry *dir;
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dir = debugfs_create_dir("uvcvideo", usb_debug_root);
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if (IS_ERR_OR_NULL(dir)) {
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uvc_printk(KERN_INFO, "Unable to create debugfs directory\n");
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return -ENODATA;
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}
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uvc_debugfs_root_dir = dir;
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return 0;
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}
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void uvc_debugfs_cleanup(void)
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{
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if (uvc_debugfs_root_dir != NULL)
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debugfs_remove_recursive(uvc_debugfs_root_dir);
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}
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