Received-SPF: pass (google.com: domain of linux-kernel+bounces-204328-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
From: Neil Armstrong <neil.armstrong@linaro.org>
Date: Thu, 06 Jun 2024 15:11:16 +0200
Subject: [PATCH v2 4/4] usb: typec-mux: nb7vpq904m: broadcast typec state
 to next mux
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Message-Id: <20240606-topic-sm8x50-upstream-retimer-broadcast-mode-v2-4-c6f6eae479c3@linaro.org>
References: <20240606-topic-sm8x50-upstream-retimer-broadcast-mode-v2-0-c6f6eae479c3@linaro.org>
In-Reply-To: <20240606-topic-sm8x50-upstream-retimer-broadcast-mode-v2-0-c6f6eae479c3@linaro.org>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>, 
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Bjorn Andersson <andersson@kernel.org>, 
 Luca Weiss <luca.weiss@fairphone.com>, linux-arm-msm@vger.kernel.org, 
 linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Neil Armstrong <neil.armstrong@linaro.org>

In the Type-C graph, the nb7vpq904m retimer is in between the USB-C
connector and the USB3/DP combo PHY, and this PHY also requires the
USB-C mode events to properly set-up the SuperSpeed Lanes functions
to setup USB3-only, USB3 + DP Altmode or DP Altmode only on the 4 lanes.

Update the nb7vpq904m retimer to get an optional type-c mux on the next
endpoint, and broadcast the received mode to it.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/usb/typec/mux/nb7vpq904m.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/mux/nb7vpq904m.c b/drivers/usb/typec/mux/nb7vpq904m.c
index 569f1162ee2e..b57b6c9c40fe 100644
--- a/drivers/usb/typec/mux/nb7vpq904m.c
+++ b/drivers/usb/typec/mux/nb7vpq904m.c
@@ -69,6 +69,7 @@ struct nb7vpq904m {
 
 	bool swap_data_lanes;
 	struct typec_switch *typec_switch;
+	struct typec_mux *typec_mux;
 
 	struct mutex lock; /* protect non-concurrent retimer & switch */
 
@@ -275,6 +276,7 @@ static int nb7vpq904m_sw_set(struct typec_switch_dev *sw, enum typec_orientation
 static int nb7vpq904m_retimer_set(struct typec_retimer *retimer, struct typec_retimer_state *state)
 {
 	struct nb7vpq904m *nb7 = typec_retimer_get_drvdata(retimer);
+	struct typec_mux_state mux_state;
 	int ret = 0;
 
 	mutex_lock(&nb7->lock);
@@ -292,7 +294,14 @@ static int nb7vpq904m_retimer_set(struct typec_retimer *retimer, struct typec_re
 
 	mutex_unlock(&nb7->lock);
 
-	return ret;
+	if (ret)
+		return ret;
+
+	mux_state.alt = state->alt;
+	mux_state.data = state->data;
+	mux_state.mode = state->mode;
+
+	return typec_mux_set(nb7->typec_mux, &mux_state);
 }
 
 static const struct regmap_config nb7_regmap = {
@@ -413,9 +422,16 @@ static int nb7vpq904m_probe(struct i2c_client *client)
 		return dev_err_probe(dev, PTR_ERR(nb7->typec_switch),
 				     "failed to acquire orientation-switch\n");
 
+	nb7->typec_mux = fwnode_typec_mux_get(dev->fwnode);
+	if (IS_ERR(nb7->typec_mux)) {
+		ret = dev_err_probe(dev, PTR_ERR(nb7->typec_mux),
+				    "Failed to acquire mode-switch\n");
+		goto err_switch_put;
+	}
+
 	ret = nb7vpq904m_parse_data_lanes_mapping(nb7);
 	if (ret)
-		goto err_switch_put;
+		goto err_mux_put;
 
 	ret = regulator_enable(nb7->vcc_supply);
 	if (ret)
@@ -458,6 +474,9 @@ static int nb7vpq904m_probe(struct i2c_client *client)
 	gpiod_set_value(nb7->enable_gpio, 0);
 	regulator_disable(nb7->vcc_supply);
 
+err_mux_put:
+	typec_mux_put(nb7->typec_mux);
+
 err_switch_put:
 	typec_switch_put(nb7->typec_switch);
 
@@ -475,6 +494,7 @@ static void nb7vpq904m_remove(struct i2c_client *client)
 
 	regulator_disable(nb7->vcc_supply);
 
+	typec_mux_put(nb7->typec_mux);
 	typec_switch_put(nb7->typec_switch);
 }
 

-- 
2.34.1