[XS] Change in coreboot[main]: soc/amd/cezanne: Enable system wake up from ACPI S3 using USB keyboard

[Anand Vaikar (Code Review)]

Anand Vaikar has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/87287?usp=email )

Change subject: soc/amd/cezanne: Enable system wake up from ACPI S3 using USB keyboard
......................................................................

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 
---
M src/soc/amd/cezanne/include/soc/smu.h
M src/soc/amd/cezanne/smihandler.c
2 files changed, 6 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/87/87287/1

diff --git a/src/soc/amd/cezanne/include/soc/smu.h b/src/soc/amd/cezanne/include/soc/smu.h
index 9216a38..36b1969 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 8b8382c..1b6e91c 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 @@
    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 @@
    					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");