linux-kernel - [PATCH v2 2/4] platform/chrome: cros_ec_typec: Get mux state inside configure

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Message-Id: <20220208184721.1697194-3-pmalani@chromium.org>
Date:   Tue,  8 Feb 2022 18:47:20 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        chrome-platform@...ts.linux.dev (open list:CHROMEOS EC USB TYPE-C
        DRIVER), Guenter Roeck <groeck@...omium.org>
Subject: [PATCH v2 2/4] platform/chrome: cros_ec_typec: Get mux state inside configure_mux

Move the function which gets current mux state inside the
cros_typec_configure_mux() function. It is better to group those
bits of functionality together, and it makes it easier to move around
cros_typec_configure_mux() later.

While we are doing this, also inline the cros_typec_get_mux_info() inside
of cros_typec_configure_mux().

Signed-off-by: Prashant Malani <pmalani@...omium.org>
---

Changes in v2:
- Changed "mux_resp" variable to "resp".

 drivers/platform/chrome/cros_ec_typec.c | 55 +++++++++++--------------
 1 file changed, 23 insertions(+), 32 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 58d08dd02f65..3d34ece7f790 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -513,27 +513,38 @@ static int cros_typec_enable_usb4(struct cros_typec_data *typec,
 }
 
 static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
-				uint8_t mux_flags,
 				struct ec_response_usb_pd_control_v2 *pd_ctrl)
 {
 	struct cros_typec_port *port = typec->ports[port_num];
+	struct ec_response_usb_pd_mux_info resp;
+	struct ec_params_usb_pd_mux_info req = {
+		.port = port_num,
+	};
 	struct ec_params_usb_pd_mux_ack mux_ack;
 	enum typec_orientation orientation;
 	int ret;
 
+	ret = cros_ec_command(typec->ec, 0, EC_CMD_USB_PD_MUX_INFO,
+			      &req, sizeof(req), &resp, sizeof(resp));
+	if (ret < 0) {
+		dev_warn(typec->dev, "Failed to get mux info for port: %d, err = %d\n",
+			 port_num, ret);
+		return ret;
+	}
+
 	/* No change needs to be made, let's exit early. */
-	if (port->mux_flags == mux_flags && port->role == pd_ctrl->role)
+	if (port->mux_flags == resp.flags && port->role == pd_ctrl->role)
 		return 0;
 
-	port->mux_flags = mux_flags;
+	port->mux_flags = resp.flags;
 	port->role = pd_ctrl->role;
 
-	if (mux_flags == USB_PD_MUX_NONE) {
+	if (port->mux_flags == USB_PD_MUX_NONE) {
 		ret = cros_typec_usb_disconnect_state(port);
 		goto mux_ack;
 	}
 
-	if (mux_flags & USB_PD_MUX_POLARITY_INVERTED)
+	if (port->mux_flags & USB_PD_MUX_POLARITY_INVERTED)
 		orientation = TYPEC_ORIENTATION_REVERSE;
 	else
 		orientation = TYPEC_ORIENTATION_NORMAL;
@@ -548,22 +559,22 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
 	if (ret)
 		return ret;
 
-	if (mux_flags & USB_PD_MUX_USB4_ENABLED) {
+	if (port->mux_flags & USB_PD_MUX_USB4_ENABLED) {
 		ret = cros_typec_enable_usb4(typec, port_num, pd_ctrl);
-	} else if (mux_flags & USB_PD_MUX_TBT_COMPAT_ENABLED) {
+	} else if (port->mux_flags & USB_PD_MUX_TBT_COMPAT_ENABLED) {
 		ret = cros_typec_enable_tbt(typec, port_num, pd_ctrl);
-	} else if (mux_flags & USB_PD_MUX_DP_ENABLED) {
+	} else if (port->mux_flags & USB_PD_MUX_DP_ENABLED) {
 		ret = cros_typec_enable_dp(typec, port_num, pd_ctrl);
-	} else if (mux_flags & USB_PD_MUX_SAFE_MODE) {
+	} else if (port->mux_flags & USB_PD_MUX_SAFE_MODE) {
 		ret = cros_typec_usb_safe_state(port);
-	} else if (mux_flags & USB_PD_MUX_USB_ENABLED) {
+	} else if (port->mux_flags & USB_PD_MUX_USB_ENABLED) {
 		port->state.alt = NULL;
 		port->state.mode = TYPEC_STATE_USB;
 		ret = typec_mux_set(port->mux, &port->state);
 	} else {
 		dev_dbg(typec->dev,
 			"Unrecognized mode requested, mux flags: %x\n",
-			mux_flags);
+			port->mux_flags);
 	}
 
 mux_ack:
@@ -638,17 +649,6 @@ static void cros_typec_set_port_params_v1(struct cros_typec_data *typec,
 	}
 }
 
-static int cros_typec_get_mux_info(struct cros_typec_data *typec, int port_num,
-				   struct ec_response_usb_pd_mux_info *resp)
-{
-	struct ec_params_usb_pd_mux_info req = {
-		.port = port_num,
-	};
-
-	return cros_ec_command(typec->ec, 0, EC_CMD_USB_PD_MUX_INFO, &req,
-			       sizeof(req), resp, sizeof(*resp));
-}
-
 /*
  * Helper function to register partner/plug altmodes.
  */
@@ -946,7 +946,6 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
 {
 	struct ec_params_usb_pd_control req;
 	struct ec_response_usb_pd_control_v2 resp;
-	struct ec_response_usb_pd_mux_info mux_resp;
 	int ret;
 
 	if (port_num < 0 || port_num >= typec->num_ports) {
@@ -982,15 +981,7 @@ static int cros_typec_port_update(struct cros_typec_data *typec, int port_num)
 		cros_typec_handle_status(typec, port_num);
 
 	/* Update the switches if they exist, according to requested state */
-	ret = cros_typec_get_mux_info(typec, port_num, &mux_resp);
-	if (ret < 0) {
-		dev_warn(typec->dev,
-			 "Failed to get mux info for port: %d, err = %d\n",
-			 port_num, ret);
-		return 0;
-	}
-
-	ret = cros_typec_configure_mux(typec, port_num, mux_resp.flags, &resp);
+	ret = cros_typec_configure_mux(typec, port_num, &resp);
 	if (ret)
 		dev_warn(typec->dev, "Configure muxes failed, err = %d\n", ret);
 
-- 
2.35.0.263.gb82422642f-goog