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mb/google/nissa: Enable early EC SW sync & eSOL for gothrax/epic

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`VBOOT_EARLY_EC_SYNC` enables EC software sync in romstage.
This is useful to achieve full USB-PD negotiation early in the boot
flow. It eliminates a problem where PMC is wrongly configured in
depthcharge during the EC-sync scenario which prevents USB devices
from getting detected when connected via a self-powered USB hub.

`VBOOT_EC_SYNC_ESOL` displays early sign-of-life (eSOL) during EC
firmware updates.

BUG=b:386920751,b:467506959,b:468885646
TEST=Verify detection and booting to OS from USB drive connected to
the Servo v4 debugger (self-powered hub) during the EC-sync scenario.
Verify that eSOL is displayed during EC firmware update.

Signed-off-by: Yunlong Jia <yunlong.jia@ecs.corp-partner.google.com>
Change-Id: I612b4dc13be2efaee863e6cacf8fc4c432edc313
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90762
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Derek Huang <derekhuang@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
This commit is contained in:
Yunlong Jia 2026-01-15 07:18:43 +00:00 • committed by Subrata Banik
commit 7351e663d2
1 changed files with 2 additions and 2 deletions
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4
src/mainboard/google/brya/Kconfig
View file

@ -1174,8 +1174,8 @@ config VARIANT_DIR
default "pujjolo" if BOARD_GOOGLE_PUJJOLO
config VBOOT
select VBOOT_EARLY_EC_SYNC if !(BOARD_GOOGLE_BASEBOARD_NISSA || BOARD_GOOGLE_BASEBOARD_TRULO) || BOARD_GOOGLE_RULL
select VBOOT_EC_SYNC_ESOL if BOARD_GOOGLE_RULL
select VBOOT_EARLY_EC_SYNC if !(BOARD_GOOGLE_BASEBOARD_NISSA || BOARD_GOOGLE_BASEBOARD_TRULO) || BOARD_GOOGLE_RULL || BOARD_GOOGLE_GOTHRAX || BOARD_GOOGLE_EPIC
select VBOOT_EC_SYNC_ESOL if BOARD_GOOGLE_RULL || BOARD_GOOGLE_GOTHRAX || BOARD_GOOGLE_EPIC
select VBOOT_LID_SWITCH
config UART_FOR_CONSOLE