Change in coreboot[master]: mb/google/brya: Allow variants to choose CAR setup configuration

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/59272 )

Change subject: mb/google/brya: Allow variants to choose CAR setup configuration
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mb/google/brya: Allow variants to choose CAR setup configuration

Lists of changes:
1. Create choice config to let ADL mb variants to pick the desire CAR
setup configuration between NEM and eNEM, where NEM and eNEM Kconfig
have selected its required IA SoC common CAR Kconfig to able to perform
the early boot configuration using CAR.
2. Lists of variants (kano, redrix, and felwinter) to drop
INTEL_CAR_NEM Kconfig select and choose eNEM.
3. Default CAR configuration for ADL mb is still NEM due to still using
older SoC skus without eNEM support enabled.

BUG=b:168820083
TEST=Able to build and boot P2 boards using eNEM mode.

Change-Id: Ibe94e6b82739ec65829859271622d904d75e978d
Signed-off-by: subratabanik 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59272
Tested-by: build bot (Jenkins) 
Reviewed-by: Tim Wawrzynczak 
Reviewed-by: EricR Lai 
---
M src/mainboard/google/brya/Kconfig
1 file changed, 15 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  EricR Lai: Looks good to me, approved
  Tim Wawrzynczak: Looks good to me, approved

diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index fa618b9..02ca38f 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -51,7 +51,6 @@
    select SOC_INTEL_ALDERLAKE_PCH_P
    select SOC_INTEL_COMMON_BLOCK_PCIE_RTD3
    select SOC_INTEL_CSE_LITE_SKU
-	select INTEL_CAR_NEM #TODO - Enable INTEL_CAR_NEM_ENHANCED

config BASEBOARD_DIR
    string
@@ -172,4 +171,19 @@
 config USE_PM_ACPI_TIMER
    default n

+choice
+	prompt "Cache as RAM (CAR) setup configuration to use"
+	default USE_ADL_ENEM if BOARD_GOOGLE_KANO || BOARD_GOOGLE_FELWINTER || BOARD_GOOGLE_REDRIX
+	default USE_ADL_NEM
+
+config USE_ADL_ENEM
+	bool "eNEM: when selected, the variant will use eNEM instead of regular NEM."
+	select INTEL_CAR_NEM_ENHANCED
+
+config USE_ADL_NEM
+	bool "NEM: when selected, the variant will use regular NEM."
+	select INTEL_CAR_NEM
+
+endchoice
+
 endif # BOARD_GOOGLE_BASEBOARD_BRYA || BOARD_GOOGLE_BASEBOARD_BRASK