From patchwork Mon Oct 17 23:35:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 616005 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCC5FC4332F for ; Mon, 17 Oct 2022 23:35:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229956AbiJQXfA (ORCPT ); Mon, 17 Oct 2022 19:35:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229675AbiJQXe6 (ORCPT ); Mon, 17 Oct 2022 19:34:58 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9571AE65; Mon, 17 Oct 2022 16:34:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666049696; x=1697585696; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Q7gifIbAGnfqIQa317CCU6jq49uc6FOfKfZTEgyZZeU=; b=LsY2c+aKpkkKu59h5v+OvIbzTb4BPtdKeHYG0B2fWQ1HXJSDQHonIjj+ fnFumz6entw4mi/pNTyLZwNJNc3bBQt050LXShLrfQcaGaYUKKIpwFHly zsT8XC4WTbx14XTKXtpD6Q4AM+nGIAO+v1C8TSxEGcGt6yUNrwnccKfIZ gLvvE33g1SfDzgxWG5v0VuBx90pNH294jBOFtOsnALvpn/olOMxM0KOQU IUV/hOXHl9D0B0+6QawAzWx96Eosy4uhEFrnXJbVprTyMc1dhplEl57GH jCG2iHgeeHaD9qD5iBeZyqZ11YYzYtN1XcY5dINtY3nRxwvQTaMOHsomo w==; X-IronPort-AV: E=McAfee;i="6500,9779,10503"; a="289240539" X-IronPort-AV: E=Sophos;i="5.95,192,1661842800"; d="scan'208";a="289240539" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2022 16:34:56 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10503"; a="753811623" X-IronPort-AV: E=Sophos;i="5.95,192,1661842800"; d="scan'208";a="753811623" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga004.jf.intel.com with ESMTP; 17 Oct 2022 16:34:54 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id B986717F; Tue, 18 Oct 2022 02:35:15 +0300 (EEST) From: Andy Shevchenko To: Greg Kroah-Hartman , Andy Shevchenko , Andrey Smirnov , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Thinh Nguyen , Steev Klimaszewski Subject: [PATCH v1 1/1] usb: dwc3: Don't switch OTG -> peripheral if extcon is present Date: Tue, 18 Oct 2022 02:35:10 +0300 Message-Id: <20221017233510.53336-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Andrey Smirnov If the extcon device exists, get the mode from the extcon device. If the controller is DRD and the driver is unable to determine the mode, only then default the dr_mode to USB_DR_MODE_PERIPHERAL. Reported-by: Steev Klimaszewski Fixes: 7a84e7353e23 ("Revert "usb: dwc3: Don't switch OTG -> peripheral if extcon is present"") Reviewed-by: Thinh Nguyen Signed-off-by: Andrey Smirnov Signed-off-by: Andy Shevchenko Tested-by: Steev Klimaszewski --- drivers/usb/dwc3/core.c | 49 +++++++++++++++++++++++++++++++++++++++- drivers/usb/dwc3/drd.c | 50 ----------------------------------------- 2 files changed, 48 insertions(+), 51 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index ea51624461b5..c0e7c76dc5c8 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -85,7 +86,7 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc) * mode. If the controller supports DRD but the dr_mode is not * specified or set to OTG, then set the mode to peripheral. */ - if (mode == USB_DR_MODE_OTG && + if (mode == USB_DR_MODE_OTG && !dwc->edev && (!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) || !device_property_read_bool(dwc->dev, "usb-role-switch")) && !DWC3_VER_IS_PRIOR(DWC3, 330A)) @@ -1690,6 +1691,46 @@ static void dwc3_check_params(struct dwc3 *dwc) } } +static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np_phy; + struct extcon_dev *edev = NULL; + const char *name; + + if (device_property_read_bool(dev, "extcon")) + return extcon_get_edev_by_phandle(dev, 0); + + /* + * Device tree platforms should get extcon via phandle. + * On ACPI platforms, we get the name from a device property. + * This device property is for kernel internal use only and + * is expected to be set by the glue code. + */ + if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) + return extcon_get_extcon_dev(name); + + /* + * Try to get an extcon device from the USB PHY controller's "port" + * node. Check if it has the "port" node first, to avoid printing the + * error message from underlying code, as it's a valid case: extcon + * device (and "port" node) may be missing in case of "usb-role-switch" + * or OTG mode. + */ + np_phy = of_parse_phandle(dev->of_node, "phys", 0); + if (of_graph_is_present(np_phy)) { + struct device_node *np_conn; + + np_conn = of_graph_get_remote_node(np_phy, -1, -1); + if (np_conn) + edev = extcon_find_edev_by_node(np_conn); + of_node_put(np_conn); + } + of_node_put(np_phy); + + return edev; +} + static int dwc3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1840,6 +1881,12 @@ static int dwc3_probe(struct platform_device *pdev) goto err2; } + dwc->edev = dwc3_get_extcon(dwc); + if (IS_ERR(dwc->edev)) { + ret = dev_err_probe(dwc->dev, PTR_ERR(dwc->edev), "failed to get extcon\n"); + goto err3; + } + ret = dwc3_get_dr_mode(dwc); if (ret) goto err3; diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 8cad9e7d3368..039bf241769a 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -8,7 +8,6 @@ */ #include -#include #include #include #include @@ -439,51 +438,6 @@ static int dwc3_drd_notifier(struct notifier_block *nb, return NOTIFY_DONE; } -static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) -{ - struct device *dev = dwc->dev; - struct device_node *np_phy; - struct extcon_dev *edev = NULL; - const char *name; - - if (device_property_read_bool(dev, "extcon")) - return extcon_get_edev_by_phandle(dev, 0); - - /* - * Device tree platforms should get extcon via phandle. - * On ACPI platforms, we get the name from a device property. - * This device property is for kernel internal use only and - * is expected to be set by the glue code. - */ - if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) { - edev = extcon_get_extcon_dev(name); - if (!edev) - return ERR_PTR(-EPROBE_DEFER); - - return edev; - } - - /* - * Try to get an extcon device from the USB PHY controller's "port" - * node. Check if it has the "port" node first, to avoid printing the - * error message from underlying code, as it's a valid case: extcon - * device (and "port" node) may be missing in case of "usb-role-switch" - * or OTG mode. - */ - np_phy = of_parse_phandle(dev->of_node, "phys", 0); - if (of_graph_is_present(np_phy)) { - struct device_node *np_conn; - - np_conn = of_graph_get_remote_node(np_phy, -1, -1); - if (np_conn) - edev = extcon_find_edev_by_node(np_conn); - of_node_put(np_conn); - } - of_node_put(np_phy); - - return edev; -} - #if IS_ENABLED(CONFIG_USB_ROLE_SWITCH) #define ROLE_SWITCH 1 static int dwc3_usb_role_switch_set(struct usb_role_switch *sw, @@ -588,10 +542,6 @@ int dwc3_drd_init(struct dwc3 *dwc) device_property_read_bool(dwc->dev, "usb-role-switch")) return dwc3_setup_role_switch(dwc); - dwc->edev = dwc3_get_extcon(dwc); - if (IS_ERR(dwc->edev)) - return PTR_ERR(dwc->edev); - if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,