tree 49dc31399b5cdeaccc5f1f86e8a89ad38caac1c6
parent 8fc68816a96c6fdfc7a35ec1c68b681b03decc06
author Jeremy Soller <jackpot51@gmail.com> 1692290208 -0600
committer Martin L Roth <gaumless@gmail.com> 1693088819 +0000

mb/system76: Enable DRIVERS_GENERIC_BAYHUB_LV2 to fix LTR issue

Clevo started using OZ711LV2 for the SD card reader around the time of
making its TGL boards. Without the driver, CPUs don't go to power states
lower than C2 due to LTR not being programmed. After enabling the driver
the CPU will go to C8 while the system is idle, giving significant power
savings if the system is left on battery power.

There is another issue with RPL where it only goes to C6 instead of C8.
This may be due to the intel_idle driver in Linux (as of 6.5-rc6
mainline and 6.4.6 stable) not supporting RPL C-states.

- tgl: Started being used with the Gazelle 3060 variant
- adl: Used on all models
- rpl: bonw15 does not have an SD card reader

Change-Id: I85c60feb6dcae7d877e70a6c6f2d3a7b3296fa0e
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77278
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>