Koen Kooi wrote:
Op 17 dec 2008, om 19:34 heeft Kevin Hilman het volgende geschreven:
Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> 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
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