125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
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* Copyright 2017 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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* Manasi Navare <manasi.d.navare@intel.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "igt.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include "intel_dp_compliance.h"
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#include <libudev.h>
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static struct udev_monitor *uevent_monitor;
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static struct udev *udev;
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static GIOChannel *udevchannel;
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static gboolean hotplug_event(GIOChannel *source, GIOCondition condition,
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gpointer data)
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{
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struct udev_device *dev;
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dev_t udev_devnum;
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struct stat s;
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const char *hotplug;
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dev = udev_monitor_receive_device(uevent_monitor);
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if (!dev)
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goto out;
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udev_devnum = udev_device_get_devnum(dev);
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fstat(drm_fd, &s);
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hotplug = udev_device_get_property_value(dev, "HOTPLUG");
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if (memcmp(&s.st_rdev, &udev_devnum, sizeof(dev_t)) == 0 &&
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hotplug && atoi(hotplug) == 1)
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update_display(0, false);
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udev_device_unref(dev);
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out:
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return TRUE;
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}
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gboolean intel_dp_compliance_setup_hotplug(void)
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{
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int ret;
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udev = udev_new();
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if (!udev) {
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igt_warn("Failed to create udev object\n");
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goto out;
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}
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uevent_monitor = udev_monitor_new_from_netlink(udev, "udev");
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if (!uevent_monitor) {
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igt_warn("Failed to create udev event monitor\n");
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goto out;
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}
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ret = udev_monitor_filter_add_match_subsystem_devtype(uevent_monitor,
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"drm",
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"drm_minor");
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if (ret < 0) {
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igt_warn("Failed to filter for drm events\n");
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goto out;
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}
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ret = udev_monitor_enable_receiving(uevent_monitor);
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if (ret < 0) {
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igt_warn("Failed to enable udev event reception\n");
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goto out;
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}
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udevchannel =
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g_io_channel_unix_new(udev_monitor_get_fd(uevent_monitor));
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if (!udevchannel) {
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igt_warn("Failed to create udev GIOChannel\n");
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goto out;
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}
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ret = g_io_add_watch(udevchannel, G_IO_IN | G_IO_ERR, hotplug_event,
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udev);
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if (ret < 0) {
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igt_warn("Failed to add watch on udev GIOChannel\n");
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goto out;
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}
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return TRUE;
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out:
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intel_dp_compliance_cleanup_hotplug();
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return FALSE;
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}
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void intel_dp_compliance_cleanup_hotplug(void)
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{
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if (udevchannel)
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g_io_channel_shutdown(udevchannel, TRUE, NULL);
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if (uevent_monitor)
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udev_monitor_unref(uevent_monitor);
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if (udev)
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udev_unref(udev);
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}
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