soc/amd/stoneyridge: use common AMD CPU power state ACPI generation
commitfc709fee099b4035e0f5311a401cda886ad0d8a2
authorFelix Held <felix-coreboot@felixheld.de>
Fri, 24 Mar 2023 20:41:35 +0000 (24 21:41 +0100)
committerFelix Held <felix-coreboot@felixheld.de>
Wed, 29 Mar 2023 16:30:50 +0000 (29 16:30 +0000)
tree6512838bda8f1d20ac3381c305ba7b9f85150ae0
parent7d8c832d1fa9fca354f93571bf0c4b8905de86d8
soc/amd/stoneyridge: use common AMD CPU power state ACPI generation

Instead of using the PSTATE SSDT generated by binaryPI, use the common
AMD code by selecting SOC_AMD_COMMON_BLOCK_ACPI_CPU_POWER_STATE. To
match the SSDT from binaryPI, set ACPI_SSDT_PSD_INDEPENDENT to n. There
are two differences to the binaryPI SSDT: Now coreboot includes the C1
state in the _CST package instead of just having the kernel add this due
to the ACPI_FADT_C1_SUPPORTED bit being set and the address of the
PS_STS_REG P state status MSR is written to the corresponding field of
the _PCT package instead of being 0.

TEST=On Careena the new P and C state ACPI packages are nearly identical
to the ones from the SSDT from binaryPI with the two functional
differences mentioned above.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Icdf6bc8f0e0363f185a294ab84edcb51322e7eb7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74023
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
src/soc/amd/stoneyridge/Kconfig
src/soc/amd/stoneyridge/acpi.c
src/soc/amd/stoneyridge/northbridge.c