From ce04bf8c7fda2e992cb405c8b3ccb2895541f65d Mon Sep 17 00:00:00 2001
From: Won Chung <wonchung@google.com>
Date: Wed, 14 Feb 2024 19:28:59 +0000
Subject: drivers/intel/pmc_mux/conn: Copy ACPI _PLD property from USB port to
 mux

Copy ACPI _PLD values from USB ports to corresponding USB muxes so that
the kernel can create symlinks between Type C connectors and
corresponding USB muxes. This symlink will be used to let userspace be
able to modify the USB role without knowing ACPI topology for the
device.

BUG=b:121287022 b:329657774
TEST=emerge-${BOARD} coreboot then check ACPI table on DUT

Change-Id: If27042cc995ef188f8a3e31444e994318ff98803
Signed-off-by: Won Chung <wonchung@google.com>
Tested-by: Emilie Roberts <hadrosaur@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81089
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Emilie Roberts <hadrosaur@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/drivers/intel/pmc_mux/conn/conn.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/drivers/intel/pmc_mux/conn/conn.c b/src/drivers/intel/pmc_mux/conn/conn.c
index c2c719991b..4b1b08c9aa 100644
--- a/src/drivers/intel/pmc_mux/conn/conn.c
+++ b/src/drivers/intel/pmc_mux/conn/conn.c
@@ -1,9 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
+#include <acpi/acpi_pld.h>
 #include <acpi/acpigen.h>
 #include <boot/coreboot_tables.h>
 #include <cbmem.h>
 #include <console/console.h>
+#include <drivers/usb/acpi/chip.h>
 #include <intelblocks/acpi.h>
 
 #include "chip.h"
@@ -94,12 +96,31 @@ static const char *orientation_to_str(enum type_c_orientation ori)
 	}
 }
 
+static void get_pld_from_usb_ports(struct acpi_pld *pld,
+	struct device *usb2_port, struct device *usb3_port)
+{
+	struct drivers_usb_acpi_config *config = NULL;
+
+	if (usb3_port)
+		config = usb3_port->chip_info;
+	else if (usb2_port)
+		config = usb2_port->chip_info;
+
+	if (config) {
+		if (config->use_custom_pld)
+			*pld = config->custom_pld;
+		else
+			acpi_pld_fill_usb(pld, config->type, &config->group);
+	}
+}
+
 static void conn_fill_ssdt(const struct device *dev)
 {
 	struct drivers_intel_pmc_mux_conn_config *config = dev->chip_info;
 	struct acpi_dp *dsd;
 	const char *scope;
 	const char *name;
+	struct acpi_pld pld = {0};
 
 	/* Reference the existing scope and write CONx device */
 	scope = acpi_device_scope(dev);
@@ -131,6 +152,10 @@ static void conn_fill_ssdt(const struct device *dev)
 
 	acpi_dp_write(dsd);
 
+	/* Copy _PLD from USB ports */
+	get_pld_from_usb_ports(&pld, config->usb2_port, config->usb3_port);
+	acpigen_write_pld(&pld);
+
 	acpigen_pop_len(); /* CONx Device */
 	acpigen_pop_len(); /* Scope */
 
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