Hi Srinivas,

On Sat, 2016-06-11 at 05:13 -0700, Srinivas Pandruvada wrote:

Starting from Cherrytrail, multiple generation of Intel processors
offers
on package sensor hub. Several recent tablets, 2-in-1 convertible
laptops
are using ISH instead of external sensor hubs. This resulted in lack
of
support of sensor function like device rotation and auto backlight
adjustment.
In addition, depending on the OEM implementation, support of ISH is
required
to support low power sleep states.

The support of ISH on Linux platforms is not new. Android platforms
with
Intel SoCs had this support for a while submitted by Daniel Drubin. 
This patcheset is reusing most of those changes with  clean up and
removing Android platform specific changes.

The user mode ABI is still same as external sensor hubs using Linux
IIO. So existing user mode software should still work.
This series primarily brings in new HID transport used in ISH.

Thanks to the community members who tested RFC patches and provided
feedback.

For users testing on Linux distributions using IIO sensor proxy,
a short term work around is required till we have debugged this
issue.
In systemd unit file iio-sensor-proxy.service
In the section "[Unit]" add
After=multi-user.target

Thank you so much for the updated patchset. It works! Auto
rotation and brightness work out of a cold boot and also after waking
up from suspend. Suspend/Wakeup is also back to usual speed.

One minor gripe I have is that the brightness seems to be set to 100%
every time upon reboot. So if I set brightness to 50% e.g., and reboot,
the brightness is reset to 100% again (not initially but right after
iio-sensor-monitor loads). Of course, this might not have anything to
do with the driver, but I just thought I should mention it here as long
as I am not sure about the cause. I attach journal logs for your
perusal.

I have now tested the patches both against kernel 4.7rc2 and 4.6.2, and
it works just fine in both cases. My test device is a Lenovo Thinkpad
Yoga 260.

Thanks and best wishes.
-- 
Atri Bhattacharya
Sat 11 Jun 15:00:41 CEST 2016

Sent from openSUSE Tumbleweed (20160609) (x86_64) on my laptop.