From c7ab9f410cfea6bd6260ecb8ac336f87f4cf3736 Mon Sep 17 00:00:00 2001 From: Raul E Rangel Date: Mon, 6 Dec 2021 10:53:54 -0700 Subject: soc/amd/{cezanne,picasso,stoney}: Clear PM/GPE when enabling ACPI According to https://uefi.org/specs/ACPI/6.4/16_Waking_and_Sleeping/sleeping-states.html?highlight=power%20states# > For ACPI/legacy systems, when transitioning from the legacy to the G0 > working state this register is cleared by platform firmware prior to > setting the SCI_EN bit. This change makes sure we clear the PM/GPE blocks are cleared before enabling the SCI_EN bit. BUG=b:172021431 TEST=Boot guybrush and morphius to OS and verify suspend resume still works. Signed-off-by: Raul E Rangel Change-Id: Icc6f542185dc520f8d181423961b74481c0b5506 Reviewed-on: https://review.coreboot.org/c/coreboot/+/59928 Tested-by: build bot (Jenkins) Reviewed-by: Felix Held --- src/soc/amd/cezanne/smihandler.c | 1 + 1 file changed, 1 insertion(+) (limited to 'src/soc/amd/cezanne') diff --git a/src/soc/amd/cezanne/smihandler.c b/src/soc/amd/cezanne/smihandler.c index 7653836151..2549ef8e2e 100644 --- a/src/soc/amd/cezanne/smihandler.c +++ b/src/soc/amd/cezanne/smihandler.c @@ -23,6 +23,7 @@ static void fch_apmc_smi_handler(void) switch (cmd) { case APM_CNT_ACPI_ENABLE: + acpi_clear_pm_gpe_status(); acpi_enable_sci(); break; case APM_CNT_ACPI_DISABLE: -- cgit v1.2.3