vgt_mgr

#!/bin/bash

#Copyright (c) 2013, Intel Corporation.
#
#This program is free software; you can redistribute it and/or modify it
#under the terms and conditions of the GNU General Public License,
#version 2, as published by the Free Software Foundation.
#
#This program is distributed in the hope it will be useful, but WITHOUT
#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
#more details.
#
#You should have received a copy of the GNU General Public License along with
#this program; if not, write to the Free Software Foundation, Inc.
#51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

get_port_name() {
	type=`echo $1|cut -c7-`
	port_name=`cat $i915_debugfs_dir/i915_display_info|sed -n '/Connector info/,$p'|grep $type|awk '{print $6}'|sed 's/,//g'`
	if [ x"$port_name" != x"PORT_A" ] && [ x"$port_name" != x"PORT_B" ] &&\
		[ x"$port_name" != x"PORT_C" ] && [ x"$port_name" != x"PORT_D" ] && [ x"$port_name" != x"PORT_E" ]; then
		port_name=unknown
	fi
}

get_drm_name () {
	drm_name=card0-`cat $i915_debugfs_dir/i915_display_info|sed -n '/Connector info/,$p'|grep $1|grep $2|awk '{print $4}'|sed 's/,//g'`
	if [ x"$drm_name" == x"card0-" ]; then
		drm_name=unknown
	fi
}


wait_for_edid () {
	EDID=""
	for try in 1 2 3 4 5 6 7 8 9 10
	do
		EDID=`cat $1`
		if [ -z "$EDID" ]; then
			sleep 1;
		else
			break;
		fi
	done

	if [ -z "$EDID" ]; then
		echo "Did not get EDID for a connected monitor from $1! Hotplug may not work properly!"
	fi
}

vgt_dir=/sys/kernel/vgt
i915_debugfs_dir=/sys/kernel/debug/dri/64

if [ -e ${i915_debugfs_dir}/i915_display_info ]; then
	:
else
	echo "vGT warning:(vgt_mgr $1 $2 $3) vGT: debugfs node i915_display_info does not exist!" > /dev/kmsg
fi
#######################################################################
############################ --help ###################################
#######################################################################
if [ x"$1" == x"--help" ]; then
	echo Usage: vgt_mgr --command param1 param2
	exit 0
fi


#######################################################################
############################ --version ################################
#######################################################################
if [ x"$1" == x"--version" ]; then
	echo 1.0
	exit 0
fi


#######################################################################
############################ --get port name ##########################
#######################################################################
if [ x"$1" == x"--get-port-name" ]; then
	get_port_name $2
	echo $port_name
	exit 0
fi


#######################################################################
############################ --get drm name ###########################
#######################################################################
if [ x"$1" == x"--get-drm-name" ]; then
	get_drm_name $2 $3
	echo $drm_name
	exit 0
fi


#######################################################################
############################ --detect display #########################
#######################################################################

if [ x"$1" == x"--detect-display" ]; then
	check_src2=0
	type=0
	connect=0
	filelist=`ls $vgt_dir`
	for guest in $filelist
	do
		if [ x"${guest:0:2}" != x"vm" ]; then
			continue
		fi

		if [ x"$2" == x"PORT_A" ]; then
			src1=/sys/class/drm/card0-eDP-1
			target=$vgt_dir/$guest/PORT_A
			type=1
		elif [ x"$2" == x"PORT_B" ]; then
			get_drm_name $2 DP
			src1=/sys/class/drm/$drm_name
			get_drm_name $2 HDMI
			src2=/sys/class/drm/$drm_name
			target=$vgt_dir/$guest/PORT_B
			check_src2=1
			type=2
		elif [ x"$2" == x"PORT_C" ]; then
			get_drm_name $2 DP
			src1=/sys/class/drm/$drm_name
			get_drm_name $2 HDMI
			src2=/sys/class/drm/$drm_name
			target=$vgt_dir/$guest/PORT_C
			check_src2=1
			type=3
		elif [ x"$2" == x"PORT_D" ]; then
			get_drm_name $2 DP
			src1=/sys/class/drm/$drm_name
			get_drm_name $2 HDMI
			src2=/sys/class/drm/$drm_name
			target=$vgt_dir/$guest/PORT_D
			check_src2=1
			type=4
		elif [ x"$2" == x"PORT_E" ]; then
			src1=/sys/class/drm/card0-VGA-1
			target=$vgt_dir/$guest/PORT_E
			type=0
		fi

		if [ ! -d $target ]; then
			continue
		fi

		if [ -d $src1 ] && [ `cat $src1/status` == "connected" ]; then
			wait_for_edid $src1/edid
			dd if=$src1/edid of=$target/edid bs=128 count=1
			echo $type > $target/type
			connect=1
		fi

		if [ -d $src2 ] && [ $check_src2 -eq 1 ] && [ `cat $src2/status` == "connected" ]; then
			wait_for_edid $src2/edid
			dd if=$src2/edid of=$target/edid bs=128 count=1
			type=`expr $type + 3`
			echo $type > $target/type
			connect=1
		fi

		if [ $connect -eq 1 ]; then
			echo "connect" > $target/connection
		else
			echo "disconnect" > $target/connection
		fi
	done
	exit 0
fi