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udev: avoid autosuspend of USB input devices 

Some of the external USB devices has internal USB hub, which
make them look like "fixed" rather than "removable". And USB
autosuspend does not work with some of these devices resulting
in inoperable pointing device.

Now the code detect these false "fixed" devices by looking at their
parents.  If any of their parent is "removable", then USB autosuspend
is not enabled for that device, which keeps the pointing device
functional.

Fixes bug:
[YOCTO #5166]

(From OE-Core rev: d74a0ecdbc85a482cab6e7eae8dcb48185d44d84)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Nitin A Kamble 2013-09-13 21:16:44 +00:00 committed by Richard Purdie
parent 9592f311b0
commit b925c752c0
2 changed files with 26 additions and 0 deletions
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1
meta/recipes-core/udev/udev.inc
View File

@ -17,6 +17,7 @@ RPROVIDES_${PN} = "hotplug"
SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/hotplug/udev-${PV}.tar.gz \
file://0001-Fixing-keyboard_force_release.sh-shell-script-path.patch \
file://avoid-mouse-autosuspend.patch \
file://run.rules \
file://udev.rules \
file://devfs-udev.rules \

25
meta/recipes-core/udev/udev/avoid-mouse-autosuspend.patch Normal file
View File

@ -0,0 +1,25 @@
Source: http://cgit.freedesktop.org/systemd/systemd/commit/rules/42-usb-hid-pm.rules?id=e0386cf2809219bbdd30895f46f1f567b56902b6
Some USB ports on external hubs may be reported as "fixed". We only want
to auto-enable this on ports that are internal to the machine, so check
the parent state as well.
Upstream-Status: backport
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
2013/09/13
Index: udev-182/rules/42-usb-hid-pm.rules
===================================================================
--- udev-182.orig/rules/42-usb-hid-pm.rules
+++ udev-182/rules/42-usb-hid-pm.rules
@@ -46,4 +46,9 @@ ACTION=="add", SUBSYSTEM=="usb", ATTRS{i
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="14dd", ATTR{idProduct}="0002", TEST=="power/control", ATTR{power/control}="auto"
# USB HID devices that are internal to the machine should also be safe to autosuspend
+# And skip it for devices which are external but say "fixed"
+ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="removable", GOTO="usb_hid_pm_end"
+ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="unknown", GOTO="usb_hid_pm_end"
ACTION=="add", SUBSYSTEM=="usb", ATTR{bInterfaceClass}=="03", ATTRS{removable}=="fixed", TEST=="../power/control", ATTR{../power/control}="auto"
+LABEL="usb_hid_pm_end"
+