From patchwork Tue Sep 27 15:53:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 610034 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 2A736C07E9D for ; Tue, 27 Sep 2022 15:53:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230118AbiI0Pxv (ORCPT ); Tue, 27 Sep 2022 11:53:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229779AbiI0Pxa (ORCPT ); Tue, 27 Sep 2022 11:53:30 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 76CBC5E662; Tue, 27 Sep 2022 08:53:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664294006; x=1695830006; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yWf0AKBcbKVO8mFX9yX+cExaY/j0C7Lc8cRLyTHGlqI=; b=ivfrbgqdwJFPYe48lZqgrlIWHfDVhm03IfvgK+VBzXItRYOEocBvUaRe lLXZYwnPbzo8P+to2+fscrNlC3MCd157if1IlBVFq0Q/qK/mpBS1c4lD+ A5JZAf45bc22N1f1zvakho6MD8/25EH65ZfYxWR6MW1KYH1UKLrg9dcGO ocD9l0lZCGkNKbQD70lSLlHRHlNUCln5woQ0gfi87MmvOXsWpkRsT6WD1 BvHvYBKYN5Zf8f2X5MJBExvb02yJruma6Y5EUXUsxdhBoJVqKWWE09oUk ACjskrIBMLdXNRtx/wHGLpxDGWrwQrrgB0Rm4MyPKi7owm8QRrCd9+m6y A==; X-IronPort-AV: E=McAfee;i="6500,9779,10483"; a="365395783" X-IronPort-AV: E=Sophos;i="5.93,349,1654585200"; d="scan'208";a="365395783" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2022 08:53:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10483"; a="950335528" X-IronPort-AV: E=Sophos;i="5.93,349,1654585200"; d="scan'208";a="950335528" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga005.fm.intel.com with ESMTP; 27 Sep 2022 08:53:22 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 78D8D101; Tue, 27 Sep 2022 18:53:41 +0300 (EEST) From: Andy Shevchenko To: Greg Kroah-Hartman , Andy Shevchenko , Andrey Smirnov , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Felipe Balbi , Ferry Toth , stable@vger.kernel.org Subject: [PATCH v2 2/2] Revert "usb: dwc3: Don't switch OTG -> peripheral if extcon is present" Date: Tue, 27 Sep 2022 18:53:32 +0300 Message-Id: <20220927155332.10762-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220927155332.10762-1-andriy.shevchenko@linux.intel.com> References: <20220927155332.10762-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This reverts commit 0f01017191384e3962fa31520a9fd9846c3d352f. As pointed out by Ferry this breaks Dual Role support on Intel Merrifield platforms. Fixes: 0f0101719138 ("usb: dwc3: Don't switch OTG -> peripheral if extcon is present") Reported-by: Ferry Toth Cc: stable@vger.kernel.org Signed-off-by: Andy Shevchenko Tested-by: Ferry Toth # for Merrifield --- drivers/usb/dwc3/core.c | 55 +---------------------------------------- drivers/usb/dwc3/drd.c | 50 +++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+), 54 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index c2b463469d51..219d797e2230 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -23,7 +23,6 @@ #include #include #include -#include #include #include #include @@ -86,7 +85,7 @@ 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 && !dwc->edev && + if (mode == USB_DR_MODE_OTG && (!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) || !device_property_read_bool(dwc->dev, "usb-role-switch")) && !DWC3_VER_IS_PRIOR(DWC3, 330A)) @@ -1668,51 +1667,6 @@ 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) { - 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; -} - static int dwc3_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1849,13 +1803,6 @@ static int dwc3_probe(struct platform_device *pdev) goto err2; } - dwc->edev = dwc3_get_extcon(dwc); - if (IS_ERR(dwc->edev)) { - ret = PTR_ERR(dwc->edev); - dev_err_probe(dwc->dev, ret, "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 039bf241769a..8cad9e7d3368 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -8,6 +8,7 @@ */ #include +#include #include #include #include @@ -438,6 +439,51 @@ 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, @@ -542,6 +588,10 @@ 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,