[S] Change in coreboot[master]: src/soc/intel/common/block/pcie/rtd3: Fix root port _ON logic

[Cliff Huang (Code Review)]

Cliff Huang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/72826 )

Change subject: src/soc/intel/common/block/pcie/rtd3: Fix root port _ON logic
......................................................................

src/soc/intel/common/block/pcie/rtd3: Fix root port _ON logic

_ON() calls _STA() at the beginning. If _STA() indicates the device is
ON, it exits immediately. Before exiting, it needs to check if it was
scheduled to be skipped first.

NOTE: RTD3 provides a way to skip _OFF() and _ON() methods following
by a device reset such as WWAN device. When such device calls its
_RST(), it increments OFSK. When the following _OFF() is called, it
was scheduled to skip, it will aslo increments ONSK. Similiarly, when
the following _ON() is called, it checks if the previous _OFF was
skipped or not. If skipped, it needs to do the same. In normal
suspend/resume cases, these two variables remains '0'. No _OFF() and
 _ON() calls are skipped.

BUG=b:241850118
TEST=Use above functions and check the generated SSDT table after OS boot.

Signed-off-by: Cliff Huang 
Change-Id: Id1ea2e78e98d334a90294ee6cdd14ae2de9b9b62
---
M src/soc/intel/common/block/pcie/rtd3/rtd3.c
1 file changed, 32 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/26/72826/1

diff --git a/src/soc/intel/common/block/pcie/rtd3/rtd3.c b/src/soc/intel/common/block/pcie/rtd3/rtd3.c
index 8a67367..726d489 100644
--- a/src/soc/intel/common/block/pcie/rtd3/rtd3.c
+++ b/src/soc/intel/common/block/pcie/rtd3/rtd3.c
@@ -144,6 +144,12 @@
    acpigen_emit_namestring(acpi_device_path_join(parent, "RTD3._STA"));
    acpigen_emit_byte(LOCAL0_OP);
    acpigen_write_if_lequal_op_int(LOCAL0_OP, ONE_OP);
+	if (config->skip_on_off_support) {
+		acpigen_write_if_lgreater_namestr_int("ONSK", 0);
+		acpigen_emit_byte(DECREMENT_OP);
+		acpigen_emit_namestring("ONSK");
+		acpigen_write_if_end();
+	}
    acpigen_write_return_op(ONE_OP);
    acpigen_write_if_end();