From bdbf345eb81bec1f25e3c490f99981623e200210 Mon Sep 17 00:00:00 2001
From: Anand Vaikar <a.vaikar2021@gmail.com>
Date: Sat, 12 Apr 2025 13:16:28 +0530
Subject: [PATCH] soc/amd/cezanne: Enable system wake up from ACPI S3 using USB
 keyboard

TEST: Tested by entering ACPI S3 sleep state and pressing any key
on USB keyboard wakes up the system.

Change-Id: Ieed635a7199f53c2e7c69c8f17b3ef50b76b8d91
Signed-off-by: Anand Vaikar <a.vaikar2021@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87287
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/soc/amd/cezanne/include/soc/smu.h | 1 +
 src/soc/amd/cezanne/smihandler.c      | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/soc/amd/cezanne/include/soc/smu.h b/src/soc/amd/cezanne/include/soc/smu.h
index 9216a38e8b..36b1969d31 100644
--- a/src/soc/amd/cezanne/include/soc/smu.h
+++ b/src/soc/amd/cezanne/include/soc/smu.h
@@ -12,6 +12,7 @@
 
 enum smu_message_id {
 	SMC_MSG_S3ENTRY = 0x0b,
+	SMC_MSG_USBS3ENTRY = 0x27,
 };
 
 /*
diff --git a/src/soc/amd/cezanne/smihandler.c b/src/soc/amd/cezanne/smihandler.c
index 8b8382cf89..1b6e91cb4c 100644
--- a/src/soc/amd/cezanne/smihandler.c
+++ b/src/soc/amd/cezanne/smihandler.c
@@ -6,6 +6,7 @@
 #include <amdblocks/psp.h>
 #include <amdblocks/smi.h>
 #include <amdblocks/smm.h>
+#include <amdblocks/smu.h>
 #include <arch/hlt.h>
 #include <arch/io.h>
 #include <console/console.h>
@@ -29,6 +30,7 @@ static void fch_slp_typ_handler(void)
 	uint32_t pci_ctrl, reg32;
 	uint16_t pm1cnt, reg16;
 	uint8_t slp_typ, rst_ctrl;
+	struct smu_payload msg = { 0 };
 
 	/* Figure out SLP_TYP */
 	pm1cnt = acpi_read16(MMIO_ACPI_PM1_CNT_BLK);
@@ -96,8 +98,10 @@ static void fch_slp_typ_handler(void)
 						reg32);
 		} /* if (CONFIG(ELOG_GSMI)) */
 
-		if (slp_typ == ACPI_S3)
+		if (slp_typ == ACPI_S3) {
 			psp_notify_sx_info(ACPI_S3);
+			send_smu_message(SMC_MSG_USBS3ENTRY, &msg);
+		}
 
 		smu_sx_entry(); /* Leave SlpTypeEn clear, SMU will set */
 		printk(BIOS_ERR, "System did not go to sleep\n");