Re: [ANNOUNCE] updated PM branch

[Kevin Hilman <khilman@deeprootsystems.com>]

Koen Kooi wrote:
> 
> Op 17 dec 2008, om 19:34 heeft Kevin Hilman het volgende geschreven:
> 
>> Kevin Hilman <khilman@deeprootsystems.com> writes:
>>
>>> The PM branch has been consolidated and rebased against today's
>>> linux-omap HEAD.  I've also included a few patches that were posted to
>>> the list that had fallen through the cracks.
>>
>> I did a couple minor updates to to the pm branch, and rebased it to
>> current HEAD.  The updates include
>>
>> - more patch consolidation
>> - VDD2 patch from Rajendra
>> - updated IVA2 reset patch which actually works :)
>> - included the GPTIMER12 fixes for Beagle
>>
>> I also tested on Beagle.  Here are some results when using a minimal
>> defconfig (attached) and using an initramfs.  I had to disable MMC and
>> USB as they are currently preventing the low-level chip retention:
>>
>> I tested this on the latest PM branch of linux-omap:
>>
>> - boot idle: 342 mA
>>
>> - screen blank: 238 mA
>>  # echo 3 > /sys/class/graphics/fb0/blank
>>
>> - suspend: 85 mA
>>  # echo 1 > /sys/power/clocks_off_while_idle
>>  # echo mem > /sys/power/state
>>
>> - sleep-while-idle: 85 mA
>>  - this same state as suspend, but happens in idle
>>  # echo 1 > /sys/power/sleep_while_idle
>>
>> This is with current PM branch of linux-omap.  I understand that
>> Tomi's new DSS tree has support to turn off the DVI framer which
>> should save even more power, but I have not tested that.
> 
> Try toggling GPIO 170 manually, current consumption should drop with 
> 60-80mA.
> 

That didn't seem to change anything for me.

Looking closer, drivers/video/omap/lcd_omap3beagle.c is already toggling
GPIO 170 in current linux-omap.  So the ~80mA drop above between 'boot 
idle' and 'screen blank' is probably already counting the DVI framer.

Kevin