Change in coreboot[master]: mb/google/dedede/var/metaknight: Update xhci device tree

[David Wu (Code Review)]

David Wu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/52887 )

Change subject: mb/google/dedede/var/metaknight: Update xhci device tree
......................................................................

mb/google/dedede/var/metaknight: Update xhci device tree

Update xhci device tree to fix can not observe LTE ACPI objects in the SSDT.

BUG=b:186380807
TEST=build and boot to OS.

Signed-off-by: David Wu 
Change-Id: I857211bfc4beb36ab225f3786c1707336a34aae9
---
M src/mainboard/google/dedede/mainboard.c
M src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h
M src/mainboard/google/dedede/variants/metaknight/variant.c
3 files changed, 44 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/87/52887/1

diff --git a/src/mainboard/google/dedede/mainboard.c b/src/mainboard/google/dedede/mainboard.c
index 26afb69..6d544b5 100644
--- a/src/mainboard/google/dedede/mainboard.c
+++ b/src/mainboard/google/dedede/mainboard.c
@@ -40,10 +40,17 @@
    gpio_configure_pads_with_override(base_pads, base_num,
    	override_pads, override_num);

+	variant_devtree_update();
+
    if (CONFIG(BOARD_GOOGLE_BASEBOARD_DEDEDE_CR50))
    	mainboard_update_soc_chip_config();
 }

+void __weak variant_devtree_update(void)
+{
+	/* Override dev tree settings per board */
+}
+
 static void mainboard_dev_init(struct device *dev)
 {
    mainboard_ec_init();
diff --git a/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h
index e7bfd86..a3dcd91 100644
--- a/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h
@@ -39,4 +39,7 @@
 /* Allow each variants to customize SMI sleep flow. */
 void variant_smi_sleep(u8 slp_typ);

+/* Modify devictree settings during ramstage. */
+void variant_devtree_update(void);
+
 #endif /*__BASEBOARD_VARIANTS_H__ */
diff --git a/src/mainboard/google/dedede/variants/metaknight/variant.c b/src/mainboard/google/dedede/variants/metaknight/variant.c
index 2540fc7..cf97496 100644
--- a/src/mainboard/google/dedede/variants/metaknight/variant.c
+++ b/src/mainboard/google/dedede/variants/metaknight/variant.c
@@ -3,7 +3,10 @@
 #include <acpi/acpi.h>
 #include <baseboard/variants.h>
 #include <delay.h>
+#include <fw_config.h>
 #include <gpio.h>
+#include <soc/pci_devs.h>
+#include <console/console.h>

static void power_off_lte_module(void)
 {
@@ -12,6 +15,32 @@
    gpio_output(GPP_A10, 0);
 }

+static void update_xhci_devtree(void)
+{
+        const struct device *xhci, *hub = NULL, *port = NULL;
+        const struct drivers_usb_acpi_config *config;
+
+        xhci = pcidev_path_on_root(PCH_DEVFN_XHCI);
+        if (!xhci) {
+                printk(BIOS_ERR, "%s: Could not locate XHCI device in DT\n", __func__);
+                return;
+        }
+
+        while ((hub = dev_bus_each_child(xhci->link_list, hub)) != NULL) {
+                while ((port = dev_bus_each_child(hub->link_list, port)) != NULL) {
+                        if ((port->path.usb.port_id != 3))
+                                continue;
+
+                        config = config_of(port);
+                        if (fw_config_probe(FW_CONFIG(DB_PORTS, DB_PORTS_1A_HDMI))) {
+                                /* Set 1A HDMI configuration */
+                        } else if (fw_config_probe(FW_CONFIG(DB_PORTS, DB_PORTS_LTE_HDMI))) {
+                                /* Set LTE HDMI configuration */
+                        }
+                }
+        }
+}
+
 void variant_smi_sleep(u8 slp_typ)
 {
    /*
@@ -21,3 +50,8 @@
    if (slp_typ == ACPI_S5)
    	power_off_lte_module();
 }
+
+void variant_devtree_update(void)
+{
+	update_xhci_devtree();
+}