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| author | Evgeny Zinoviev <me@ch1p.com> | 2018-08-30 00:23:39 +0300 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-09-02 03:10:39 +0000 |
| commit | 0186912f9ecfc363071affeefa9b9e28966c0245 (patch) | |
| tree | f6f241b741e168c80a13b40c3d47d3c7a02302de /src/arch/riscv | |
| parent | b7c0b8c8ee13bf4ae0736ddc1abc4f5a86d2a3ba (diff) | |
mb/lenovo: dGPU power handling on T430, T530
Enable dGPU power handling on Lenovo ThinkPad T430, T530 via PMH7
register 0x50.
Although there's no Thinker-1 chip on these models according to
schematics, dGPU power control via PMH7 works the same as on T420/T520,
so they can be considered Thinker-1-compatible.
It can be tested from linux userspace using util/pmh7tool.
To turn dGPU power off:
pmh7tool -c 0x50 7
pmh7tool -c 0x50 3
To turn it on:
pmh7tool -s 0x50 3
pmh7tool -s 0x50 7
To check whether it is on (bash):
reg=0x$(pmh7tool -r 0x50)
echo "$(( (( reg & 0x08 )) >> 3 ))"
or just `pmh7tool -b 0x50 3` with
https://review.coreboot.org/#/c/coreboot/+/28388/
Tested on ThinkPad W530.
Change-Id: Ieab1a33b3c680c757cc0999660b5cb7e122474cc
Signed-off-by: Evgeny Zinoviev <me@ch1p.com>
Reviewed-on: https://review.coreboot.org/28392
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/arch/riscv')
0 files changed, 0 insertions, 0 deletions