From e24b006ee4b45fc22c0eeae618f2d32102e36148 Mon Sep 17 00:00:00 2001 From: Scott Chao Date: Tue, 21 Dec 2021 14:18:31 +0800 Subject: mb/google/brya/var/gimble{4es}: Decrease touchscreen T3 timing to 200ms We set T3 as 300ms to meet Elan's spec, but the resume/suspend times are greater than 500ms, which is the spec for Chromebooks. The actual kernel timing has been measured, and given the ACPI delay after deasserting reset in addition to the delay until the kernel driver accesses the device, delaying only 200ms in the ACPI method is also sufficient to meet the 300ms requirement. BUG=b:210772498 BRANCH=none TEST=build and test touchscreen function on DUT. TEST=suspend, wake DUT and check touchscreen function. Signed-off-by: Scott Chao Change-Id: I4bb4eda09686cb59b6e19c741aa2b78d84332d2a Reviewed-on: https://review.coreboot.org/c/coreboot/+/60270 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak Reviewed-by: Nick Vaccaro --- src/mainboard/google/brya/variants/gimble/overridetree.cb | 2 +- src/mainboard/google/brya/variants/gimble4es/overridetree.cb | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/mainboard/google/brya/variants/gimble/overridetree.cb b/src/mainboard/google/brya/variants/gimble/overridetree.cb index 401909b43f..23071fe97a 100644 --- a/src/mainboard/google/brya/variants/gimble/overridetree.cb +++ b/src/mainboard/google/brya/variants/gimble/overridetree.cb @@ -198,7 +198,7 @@ chip soc/intel/alderlake register "generic.probed" = "1" register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)" - register "generic.reset_delay_ms" = "300" + register "generic.reset_delay_ms" = "200" register "generic.reset_off_delay_ms" = "1" register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)" diff --git a/src/mainboard/google/brya/variants/gimble4es/overridetree.cb b/src/mainboard/google/brya/variants/gimble4es/overridetree.cb index 0b29e4d02d..0dd8c75934 100644 --- a/src/mainboard/google/brya/variants/gimble4es/overridetree.cb +++ b/src/mainboard/google/brya/variants/gimble4es/overridetree.cb @@ -161,7 +161,7 @@ chip soc/intel/alderlake register "generic.probed" = "1" register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C1)" - register "generic.reset_delay_ms" = "300" + register "generic.reset_delay_ms" = "200" register "generic.reset_off_delay_ms" = "1" register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C0)" -- cgit v1.2.3