[PATCH v2 2/2] platform/chrome: cros_ec_typec: Make sure the USB role switch has PLD

Heikki Krogerus
2024-02-13T13:00:31Z

The USB role switch does not always have the _PLD (Physical
Location of Device) in ACPI tables. If it's missing,
assigning the PLD hash of the port to the switch. That
should guarantee that the USB Type-C port mapping code is
always able to find the connection between the two (the port
and the switch).

Tested-by: Uday Bhat <uday.m.bhat@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/platform/chrome/cros_ec_typec.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 2b2f14a1b711..4d305876ec08 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -24,6 +24,23 @@
#define DP_PORT_VDO (DP_CONF_SET_PIN_ASSIGN(BIT(DP_PIN_ASSIGN_C) | BIT(DP_PIN_ASSIGN_D)) | \
DP_CAP_DFP_D | DP_CAP_RECEPTACLE)

+static void cros_typec_role_switch_quirk(struct fwnode_handle *fwnode)
+{
+#ifdef CONFIG_ACPI
+ struct fwnode_handle *switch_fwnode;
+
+ /* Supply the USB role switch with the correct pld_crc if it's missing. */
+ switch_fwnode = fwnode_find_reference(fwnode, "usb-role-switch", 0);
+ if (!IS_ERR_OR_NULL(switch_fwnode)) {
+ struct acpi_device *adev = to_acpi_device_node(switch_fwnode);
+
+ if (adev && !adev->pld_crc)
+ adev->pld_crc = to_acpi_device_node(fwnode)->pld_crc;
+ fwnode_handle_put(switch_fwnode);
+ }
+#endif
+}
+
static int cros_typec_parse_port_props(struct typec_capability *cap,
struct fwnode_handle *fwnode,
struct device *dev)
@@ -66,6 +83,8 @@ static int cros_typec_parse_port_props(struct typec_capability *cap,
cap->prefer_role = ret;
}

+ cros_typec_role_switch_quirk(fwnode);
+
cap->fwnode = fwnode;

return 0;
--
2.43.0