Change in coreboot[master]: intelblocks/cse: Skip sending EOP during S3 resume

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/62271 )

Change subject: intelblocks/cse: Skip sending EOP during S3 resume
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intelblocks/cse: Skip sending EOP during S3 resume

coreboot should skip sending EOP during S3 resume since CSE doesn't
require EOP in resume path.

Currently EOP is being sent during PAYLOAD_BOOT or PAYLOAD_LOAD stage
which doesn't get called during S3 resume.

In case EOP is moved in earlier stage, coreboot might send EOP in S3
resume as well. This patch adds check before calling cse_send_eop.

BUG=b:211085685
BRANCH=None
TEST=Check by moving EOP to earlier stage. EOP sending is skipped during
S3 resume.

Change-Id: I8f22446974bc1e7b2d57468633c36bb99ffe1436
Signed-off-by: MAULIK V VAGHELA 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62271
Tested-by: build bot (Jenkins) 
Reviewed-by: Sridhar Siricilla 
Reviewed-by: Subrata Banik 
---
M src/soc/intel/common/block/cse/cse_eop.c
1 file changed, 6 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Sridhar Siricilla: Looks good to me, approved
  Subrata Banik: Looks good to me, approved

diff --git a/src/soc/intel/common/block/cse/cse_eop.c b/src/soc/intel/common/block/cse/cse_eop.c
index 0f1d6ca..3a08a73 100644
--- a/src/soc/intel/common/block/cse/cse_eop.c
+++ b/src/soc/intel/common/block/cse/cse_eop.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

+#include <acpi/acpi.h>
 #include <bootstate.h>
 #include <console/console.h>
 #include <intelblocks/cse.h>
@@ -175,6 +176,11 @@
    	return;
    }

+	if (acpi_get_sleep_type() == ACPI_S3) {
+		printk(BIOS_INFO, "Skip sending EOP during S3 resume\n");
+		return;
+	}
+
    /*
     * If CSE is already hidden then accessing CSE registers would be wrong and will
     * receive junk, hence, return as CSE is already disabled.