linux-kernel - [PATCH v4 2/2] usb: typec: intel_pmc_mux: Configure Active and Retimer Cable type

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Message-Id: <20230718024703.1013367-3-utkarsh.h.patel@intel.com>
Date:   Mon, 17 Jul 2023 19:47:03 -0700
From:   Utkarsh Patel <utkarsh.h.patel@...el.com>
To:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        heikki.krogerus@...ux.intel.com, pmalani@...omium.org,
        bleung@...omium.org
Cc:     Utkarsh Patel <utkarsh.h.patel@...el.com>
Subject: [PATCH v4 2/2] usb: typec: intel_pmc_mux: Configure Active and Retimer Cable type

Cable type such as active and retimer received as a part of Thunderbolt3
or Thunderbolt4 cable discover mode VDO needs to be configured in the
thunderbolt alternate mode.

Configuring the register bits for this cable type is changed with Intel
Meteor Lake platform. BIT2 for Retimer/Redriver cable and BIT22 for
Active/Passive cable.

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Utkarsh Patel <utkarsh.h.patel@...el.com>
---
Changes in v4:
 - No changes.

Changes in v3:
 - No changes.

Changes in v2:
 - No changes.
---
---
 drivers/usb/typec/mux/intel_pmc_mux.c | 28 +++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index 5e8edf3881c0..888632847a74 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -59,7 +59,7 @@ enum {
 };
 
 /* Common Mode Data bits */
-#define PMC_USB_ALTMODE_ACTIVE_CABLE	BIT(2)
+#define PMC_USB_ALTMODE_RETIMER_CABLE	BIT(2)
 
 #define PMC_USB_ALTMODE_ORI_SHIFT	1
 #define PMC_USB_ALTMODE_UFP_SHIFT	3
@@ -71,6 +71,7 @@ enum {
 #define PMC_USB_ALTMODE_TBT_TYPE	BIT(17)
 #define PMC_USB_ALTMODE_CABLE_TYPE	BIT(18)
 #define PMC_USB_ALTMODE_ACTIVE_LINK	BIT(20)
+#define PMC_USB_ALTMODE_ACTIVE_CABLE	BIT(22)
 #define PMC_USB_ALTMODE_FORCE_LSR	BIT(23)
 #define PMC_USB_ALTMODE_CABLE_SPD(_s_)	(((_s_) & GENMASK(2, 0)) << 25)
 #define   PMC_USB_ALTMODE_CABLE_USB31	1
@@ -319,8 +320,18 @@ pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state)
 	if (data->cable_mode & TBT_CABLE_LINK_TRAINING)
 		req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK;
 
-	if (data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE)
-		req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
+	if (acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1072", NULL) ||
+	    acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1079", NULL)) {
+		if ((data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE) ||
+		    (data->cable_mode & TBT_CABLE_RETIMER))
+			req.mode_data |= PMC_USB_ALTMODE_RETIMER_CABLE;
+	} else {
+		if (data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE)
+			req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
+
+		if (data->cable_mode & TBT_CABLE_RETIMER)
+			req.mode_data |= PMC_USB_ALTMODE_RETIMER_CABLE;
+	}
 
 	req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed);
 
@@ -359,8 +370,17 @@ pmc_usb_mux_usb4(struct pmc_usb_port *port, struct typec_mux_state *state)
 	case EUDO_CABLE_TYPE_OPTICAL:
 		req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE;
 		fallthrough;
+	case EUDO_CABLE_TYPE_RE_TIMER:
+		if (!acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1072", NULL) ||
+		    !acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1079", NULL))
+			req.mode_data |= PMC_USB_ALTMODE_RETIMER_CABLE;
+		fallthrough;
 	default:
-		req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
+		if (acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1072", NULL) ||
+		    acpi_dev_hid_uid_match(port->pmc->iom_adev, "INTC1079", NULL))
+			req.mode_data |= PMC_USB_ALTMODE_RETIMER_CABLE;
+		else
+			req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
 
 		/* Configure data rate to rounded in the case of Active TBT3
 		 * and USB4 cables.
-- 
2.25.1