[coreboot] [HELP!!!] Pavilion EC (similar to compal/ene932) and its woes
mr.nuke.me at gmail.com
Sat Apr 5 19:03:39 CEST 2014
So, in messing with this Pavilion m6_1935dx, I was able to get most of the EC
running as expected. It seems that, at least the (ACPI) register layout is the
same. We can get good battery _and_ AC indicators from it.
When we query the EC (say, doing a cat /sys/class/power/AC/online), it
responds properly with an SCI whenever the status register changes, and the
query goes well. And that's about it.
When an event happens, on the other hand, like a hotkey, or AC is removed, it
does not generate an SCI that would lead to a query call (_Qxx). Instead it
spits out an SMI. I know for a fact that the SCI and SMI GPEs are where we
expect them to be.
I see google/parrot uses the same physical EC silicon, though the EC firmware
may be a different beast. However, I'd like to ask of you gurus who have
worked on parrot... what's your take on this?
More technical details:
I've made ACPI print a debug message whenever GPE23 is triggered (_L17). This
is the EC SMI event.
I'm also using linux supermagic to get an idea of what is going on:
# echo 0x88000502 > /sys/module/acpi/parameters/debug_level
# echo 0x00060006 > /sys/module/acpi/parameters/debug_layer
# echo -n 'file ec.c +p' | tee /sys/kernel/debug/dynamic_debug/control
That's how I know the GPE for SCI is correct (also same GPE in the vendor's
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