[coreboot-gerrit] Change in ...coreboot[master]: src/mainboard/pcengines/apu2/OemCustomize.c: Enable CPB feature

[Kyösti Mälkki (Code Review)]

Kyösti Mälkki has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/31229 )

Change subject: src/mainboard/pcengines/apu2/OemCustomize.c: Enable CPB feature
......................................................................

src/mainboard/pcengines/apu2/OemCustomize.c: Enable CPB feature

Enable Core Performance Boost feature in automatic mode.
Also enable C6 state which is a dependency for proper CPB operation.

CPB allows to raise single core frequency from 1000MHz to 1400MHz
during high load if other cores idle. The processor has additional
boosted P-states when CPB is enabled, but these are hidden from OS.

TEST: Higher single-core CPU performance is indicated by increased
memory bandwidth as reported by memtest86+.

Signed-off-by: Michał Żygowski 
Change-Id: I5e080bfaee06fd13cedf5151d4a598ec212213f2
Reviewed-on: https://review.coreboot.org/c/31229
Reviewed-by: Kyösti Mälkki 
Reviewed-by: Felix Held 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/pcengines/apu2/OemCustomize.c
1 file changed, 2 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Kyösti Mälkki: Looks good to me, approved
  Felix Held: Looks good to me, but someone else must approve

diff --git a/src/mainboard/pcengines/apu2/OemCustomize.c b/src/mainboard/pcengines/apu2/OemCustomize.c
index a729860..700f4c7 100644
--- a/src/mainboard/pcengines/apu2/OemCustomize.c
+++ b/src/mainboard/pcengines/apu2/OemCustomize.c
@@ -97,4 +97,6 @@
    )
 {
    InitEarly->GnbConfig.PcieComplexList = &PcieComplex;
+	InitEarly->PlatformConfig.CStateMode = CStateModeC6;
+	InitEarly->PlatformConfig.CpbMode = CpbModeAuto;
 }