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#!/bin/sh
#
# Copyright 2006-2007 Richard Hughes <richard@hughsie.com>
# Copyright 2007 Peter Jones <pjones@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
# Handle video quirks. If you are having suspend/resume issues,
# troubleshooting using this hook is probably the best place to start.
# If it weren't for video card quirks, suspend/resume on Linux would be
# a whole lot more stable.
. "${PM_FUNCTIONS}"
for opt in $PM_CMDLINE; do
case "${opt##--quirk-}" in # just quirks, please
dpms-on) QUIRK_DPMS_ON="true" ;;
dpms-suspend) QUIRK_DPMS_SUSPEND="true" ;;
radeon-off) QUIRK_RADEON_OFF="true" ;;
reset-brightness) QUIRK_RESET_BRIGHTNESS="true" ;;
s3-bios) QUIRK_S3_BIOS="true" ;;
s3-mode) QUIRK_S3_MODE="true" ;;
vbe-post) QUIRK_VBE_POST="true" ;;
vbemode-restore) QUIRK_VBEMODE_RESTORE="true" ;;
vbestate-restore) QUIRK_VBESTATE_RESTORE="true" ;;
vga-mode3) QUIRK_VGA_MODE_3="true" ;;
no-fb) QUIRK_NOFB="true" ;;
pci-save) QUIRK_PCI_SAVE="true" ;;
none) QUIRK_NONE="true" ;;
*) continue ;;
esac
done
reset_brightness()
{
for bl in /sys/class/backlight/* ; do
[ -f "$bl/brightness" ] || continue
BR="$(cat $bl/brightness)"
echo 0 > "$bl/brightness"
echo "$BR" > "$bl/brightness"
done
}
if command_exists vbetool; then
vbe() { vbetool "$@"; }
else
vbe() { echo "vbetool not installed!" 1>&2; return 1; }
fi
if command_exists radeontool; then
radeon() { radeontool "$@"; }
else
radeon() { echo "radeontool not found" 1>&2; return 1; }
fi
die_if_framebuffer()
{
[ -d "/sys/class/graphics/fb0" ] || return
echo "--quirk-no-fb passed, but system is using a framebuffer."
echo "Aborting."
exit 1
}
save_fbcon()
{
local con
for con in /sys/class/graphics/*/state; do
[ -f $con ] || continue
echo 1 >"${con}"
done
}
resume_fbcon()
{
local con
for con in /sys/class/graphics/*/state; do
[ -f $con ] || continue
echo 0 >"${con}"
done
}
# Some tiny helper functions for quirk handling
quirk() { [ "$1" = "true" ] && [ -z $QUIRK_NONE ]; }
# save/restore vbe state
vbe_savestate() { vbe vbestate save |savestate vbestate; }
vbe_restorestate() { restorestate vbestate |vbe vbestate restore; }
# save/restore the vbe mode
vbe_savemode() { vbe vbemode get |savestate vbemode; }
vbe_restoremode()
{
# this is a little mode complicated to handle special-casing mode 3.
local vbemode=$(restorestate vbemode)
if [ "$vbemode" = "3" ]; then
vbe vgamode set $vbemode
else
vbe vbemode set $vbemode
fi
}
# post the video card
vbe_post()
{
local rom="/var/run/video.rom"
# if we do not have a romfile, do not post with it.
[ -f "$rom" ] || unset rom
vbe post $rom
sleep 0.1
}
# turn critical bits of radeon cards off/on
radeon_off() { radeon dac off; radeon light off; }
radeon_on() { radeon dac on; radeon light on; }
# save and restore video card PCI config state
save_pci()
{
local pci="/sys/bus/pci/devices"
for dev in "${pci}"/*; do
[ -f "${dev}/class" ] || continue
[ $(cat "${dev}/class") = "0x030000" ] || continue
[ -f "${dev}/config" ] || continue
# it is a video card, it has a configuration. Save it.
savestate "pci_video_${dev##*/}" <${dev}/config
done
}
restore_pci()
{
local pci="/sys/bus/pci/devices"
for dev in "${pci}"/*; do
state_exists "pci_video_${dev##*/}" || continue
restorestate "pci_video_${dev##*/}" > "${dev}/config"
done
}
suspend_video()
{
# 0=nothing, 1=s3_bios, 2=s3_mode, 3=both
local acpi_flag=0
quirk "${QUIRK_S3_BIOS}" && acpi_flag=$(($acpi_flag + 1))
quirk "${QUIRK_S3_MODE}" && acpi_flag=$(($acpi_flag + 2))
[ 0 -ne $acpi_flag ] && sysctl -w kernel.acpi_video_flags=$acpi_flag
quirk "${QUIRK_NOFB}" && die_if_framebuffer
quirk "${QUIRK_VBESTATE_RESTORE}" && vbe_savestate
quirk "${QUIRK_VBEMODE_RESTORE}" && vbe_savemode
quirk "${QUIRK_RADEON_OFF}" && radeon_off
quirk "${QUIRK_PCI_SAVE}" && pci_save
quirk "${QUIRK_VGA_MODE_3}" && vbe vbemode set 3
quirk "${QUIRK_DPMS_SUSPEND}" && vbe dpms suspend
save_fbcon
}
resume_video()
{
# We might need to do one or many of these quirks
quirk "${QUIRK_PCI_SAVE}" && pci_restore
quirk "${QUIRK_VBE_POST}" && vbe_post
quirk "${QUIRK_VBESTATE_RESTORE}" && vbe_restorestate
quirk "${QUIRK_VBEMODE_RESTORE}" && vbe_restoremode
resume_fbcon # also should be handled by a quirk.
quirk "${QUIRK_RADEON_OFF}" && radeon_on
quirk "${QUIRK_DPMS_ON}" && vbe dpms on
quirk "${QUIRK_RESET_BRIGHTNESS}" && reset_brightness
# always reset acpi_video_flag -- makes quirk testing more reliable.
sysctl -w kernel.acpi_video_flags=0
return 0 # avoid spurious hook exit failure message.
}
help() {
echo # first echo makes it look nicer.
echo "Video quirk handler options:"
echo
echo " --quirk-dpms-on"
echo " --quirk-dpms-suspend"
echo " --quirk-radeon-off"
echo " --quirk-reset-brightness"
echo " --quirk-s3-bios"
echo " --quirk-s3-mode"
echo " --quirk-vbe-post"
echo " --quirk-vbemode-restore"
echo " --quirk-vbestate-restore"
echo " --quirk-vga-mode3"
echo " --quirk-none"
}
case "$1" in
suspend) suspend_video ;;
hibernate)
if [ "$HIBERNATE_RESUME_POST_VIDEO" = "yes" ]; then
suspend_video
fi
;;
resume) resume_video ;;
thaw)
if [ "${HIBERNATE_RESUME_POST_VIDEO}" = "yes" ]; then
resume_video
fi
;;
help) help ;;
esac
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