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/*
* Copyright 2017 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
* Manasi Navare <manasi.d.navare@intel.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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 "igt.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "intel_dp_compliance.h"
#include <libudev.h>
static struct udev_monitor *uevent_monitor;
static struct udev *udev;
static GIOChannel *udevchannel;
static gboolean hotplug_event(GIOChannel *source, GIOCondition condition,
gpointer data)
{
struct udev_device *dev;
dev_t udev_devnum;
struct stat s;
const char *hotplug;
dev = udev_monitor_receive_device(uevent_monitor);
if (!dev)
goto out;
udev_devnum = udev_device_get_devnum(dev);
fstat(drm_fd, &s);
hotplug = udev_device_get_property_value(dev, "HOTPLUG");
if (memcmp(&s.st_rdev, &udev_devnum, sizeof(dev_t)) == 0 &&
hotplug && atoi(hotplug) == 1)
update_display(0, false);
udev_device_unref(dev);
out:
return TRUE;
}
gboolean intel_dp_compliance_setup_hotplug(void)
{
int ret;
udev = udev_new();
if (!udev) {
igt_warn("Failed to create udev object\n");
goto out;
}
uevent_monitor = udev_monitor_new_from_netlink(udev, "udev");
if (!uevent_monitor) {
igt_warn("Failed to create udev event monitor\n");
goto out;
}
ret = udev_monitor_filter_add_match_subsystem_devtype(uevent_monitor,
"drm",
"drm_minor");
if (ret < 0) {
igt_warn("Failed to filter for drm events\n");
goto out;
}
ret = udev_monitor_enable_receiving(uevent_monitor);
if (ret < 0) {
igt_warn("Failed to enable udev event reception\n");
goto out;
}
udevchannel =
g_io_channel_unix_new(udev_monitor_get_fd(uevent_monitor));
if (!udevchannel) {
igt_warn("Failed to create udev GIOChannel\n");
goto out;
}
ret = g_io_add_watch(udevchannel, G_IO_IN | G_IO_ERR, hotplug_event,
udev);
if (ret < 0) {
igt_warn("Failed to add watch on udev GIOChannel\n");
goto out;
}
return TRUE;
out:
intel_dp_compliance_cleanup_hotplug();
return FALSE;
}
void intel_dp_compliance_cleanup_hotplug(void)
{
if (udevchannel)
g_io_channel_shutdown(udevchannel, TRUE, NULL);
if (uevent_monitor)
udev_monitor_unref(uevent_monitor);
if (udev)
udev_unref(udev);
}
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