From mboxrd@z Thu Jan 1 00:00:00 1970 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 DF32FC4708E for ; Wed, 7 Dec 2022 13:19:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229944AbiLGNTp (ORCPT ); Wed, 7 Dec 2022 08:19:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229651AbiLGNTn (ORCPT ); Wed, 7 Dec 2022 08:19:43 -0500 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::221]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E92322B1A; Wed, 7 Dec 2022 05:19:41 -0800 (PST) Received: (Authenticated sender: foss@0leil.net) by mail.gandi.net (Postfix) with ESMTPSA id 4A39924000A; Wed, 7 Dec 2022 13:19:36 +0000 (UTC) From: Quentin Schulz To: Minas Harutyunyan , Greg Kroah-Hartman Cc: Quentin Schulz , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, William Wu , Bin Yang , Frank Wang Subject: [PATCH 0/3] usb: dwc2: fix USB peripheral role in dual-role mode on PX30 Date: Wed, 7 Dec 2022 14:19:15 +0100 Message-Id: <20221206-dwc2-gadget-dual-role-v1-0-36515e1092cd@theobroma-systems.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.10.1 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Quentin Schulz On Theobroma Ringneck SoM, USB peripheral role when in dual-role mode does not work and displays the following error message: dwc2 ff300000.usb: dwc2_core_reset: HANG! Soft Reset timeout GRSTCTL_CSFTRST The USB sniffer shows nothing and dumping the host registers is stuck on HCDMA(0) register. Note that for some reason it works "fine" on PX30-EVB (there's another issue but not related to/fixed in this patch series). Since there's no documentation available for this IP, this patch series is basically just slightly adapted downstream BSP vendor kernel patches and I cannot unfortunately give more information than what I have. This patch series was tested on Theobroma Ringneck SoM on Haikou devkit and PX30 EVB. It fixes Ringneck support and does not break PX30-EVB's. For reference, the content of those commits can be found in tag linux-5.10-gen-rkr1, and the following commits have been used: 964d50060bf53a8defd1fc561b9261424f25ddad ad81c375602819a538ad68d979906c05663046e2 6e6adab8f735bc4fe27a67bdc3144d8fa89250d4 7c3a4e60247fd7f7b04d95d15cb12c63a5c20408 Note that Rockchip kernel called a slightly different implementation of __dwc2_lowlevel_hw_enable instead of dwc2_lowlevel_hw_enable but it seemed more right to me to call dwc2_lowlevel_hw_enable as done for the forced peripheral mode. I'm assuming the patch disabling phy initialization might need to be made Rockchip-specific? To: Minas Harutyunyan To: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: William Wu Cc: Frank Wang Cc: Bin Yang Signed-off-by: Quentin Schulz --- Bin Yang (1): usb: dwc2: prevent core phy initialisation Quentin Schulz (2): usb: dwc2: disable lpm feature on Rockchip SoCs usb: dwc2: power on/off phy for peripheral mode in dual-role mode drivers/usb/dwc2/gadget.c | 6 ++++-- drivers/usb/dwc2/hcd.c | 7 +++++++ drivers/usb/dwc2/params.c | 4 ++++ drivers/usb/dwc2/platform.c | 3 ++- 4 files changed, 17 insertions(+), 3 deletions(-) --- base-commit: 76dcd734eca23168cb008912c0f69ff408905235 change-id: 20221206-dwc2-gadget-dual-role-aac67e6d42fd Best regards, -- Quentin Schulz