{soc,southbridge}/*/*/acpi: Add possibility to disable S4

Some boards don't support S3 or S4. The S4 state can't be removed from
the available sleep states.

Add a config item that allows removal of the S4 state from the list of
available sleep states. The S4 state can be removed by selecting the
item on board level.

For the AMD chipsets the SSFG mask is updated to remove the S4 state.

BUG=N/A
TEST=build

Change-Id: Id802c4cc40308ddf39e99e7f226d55e0e020f0c9
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38431
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/Kconfig

@@ -525,6 +525,12 @@ config HAVE_ACPI_RESUME
 	default n
 	depends on RELOCATABLE_RAMSTAGE
 
+config DISABLE_ACPI_HIBERNATE
+	bool
+	default n
+	help
+	  Removes S4 from the available sleepstates
+
 config RESUME_PATH_SAME_AS_BOOT
 	bool
 	default y if ARCH_X86

src/soc/amd/picasso/acpi/sleepstates.asl

@@ -19,6 +19,9 @@ Name(SSFG, 0x09)
 If (CONFIG(HAVE_ACPI_RESUME)) {
 	Store(0x0D, SSFG)
 }
+If (CONFIG(DISABLE_ACPI_HIBERNATE)) {
+	Store(And(SSFG, 0xF7), SSFG)
+}
 
 /* Supported sleep states: */
 Name(\_S0, Package () {0x00, 0x00, 0x00, 0x00} )	/* (S0) - working state */

src/soc/amd/stoneyridge/acpi/sleepstates.asl

@@ -19,6 +19,9 @@ Name(SSFG, 0x09)
 If (CONFIG(HAVE_ACPI_RESUME)) {
 	Store(0x0D, SSFG)
 }
+If (CONFIG(DISABLE_ACPI_HIBERNATE)) {
+	Store(And(SSFG, 0xF7), SSFG)
+}
 
 /* Supported sleep states: */
 Name(\_S0, Package () {0x00, 0x00, 0x00, 0x00} )	/* (S0) - working state */

src/southbridge/amd/common/acpi/sleepstates.asl

@@ -20,6 +20,9 @@ Name (SSFG, 0x0D)
 #else
 Name (SSFG, 0x09)
 #endif
+If (CONFIG(DISABLE_ACPI_HIBERNATE)) {
+	Store(And(SSFG, 0xF7), SSFG)
+}
 
 /* Supported sleep states: */
 Name(\_S0, Package () {0x00, 0x00, 0x00, 0x00} )	/* (S0) - working state */

src/southbridge/intel/common/acpi/sleepstates.asl

@@ -20,5 +20,7 @@ Name(\_S1, Package(){0x1,0x0,0x0,0x0})
 #else
 Name(\_S3, Package(){0x5,0x0,0x0,0x0})
 #endif
+#if !CONFIG(DISABLE_ACPI_HIBERNATE)
 Name(\_S4, Package(){0x6,0x0,0x0,0x0})
+#endif
 Name(\_S5, Package(){0x7,0x0,0x0,0x0})