linux-kernel - [PATCH 1/3] usb: typec: ucsi: call typec_set

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Message-Id: <20230614-topic-sm8550-upstream-type-c-audio-v1-1-15a92565146b@linaro.org>
Date:   Wed, 14 Jun 2023 15:10:39 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 1/3] usb: typec: ucsi: call typec_set_mode on non-altmode
 partner change

Add support for calling typec_set_mode() for the DEBUG, AUDIO
accessory modes.

Let's also call typec_set_mode() for USB as default and SAFE
when partner is disconnected.

The USB state is only called when ALT mode is specifically
not specified by the partner status flags in order
to leave the altmode handlers setup the proper mode to
switches, muxes and retimers.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 2b472ec01dc4..44f43cdea5c1 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -809,6 +809,23 @@ static void ucsi_partner_change(struct ucsi_connector *con)
 		break;
 	}
 
+	if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
+		switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
+		case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
+			typec_set_mode(con->port, TYPEC_MODE_DEBUG);
+			break;
+		case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
+			typec_set_mode(con->port, TYPEC_MODE_AUDIO);
+			break;
+		default:
+			if (UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) ==
+					UCSI_CONSTAT_PARTNER_FLAG_USB)
+				typec_set_mode(con->port, TYPEC_STATE_USB);
+		}
+	} else {
+		typec_set_mode(con->port, TYPEC_STATE_SAFE);
+	}
+
 	/* Only notify USB controller if partner supports USB data */
 	if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
 		u_role = USB_ROLE_NONE;

-- 
2.34.1