From patchwork Fri Dec 16 16:29:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Schulz X-Patchwork-Id: 634952 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 4172EC4332F for ; Fri, 16 Dec 2022 16:30:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231241AbiLPQaR (ORCPT ); Fri, 16 Dec 2022 11:30:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231255AbiLPQaI (ORCPT ); Fri, 16 Dec 2022 11:30:08 -0500 Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [217.70.183.196]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67A0956D5D; Fri, 16 Dec 2022 08:30:07 -0800 (PST) Received: (Authenticated sender: foss@0leil.net) by mail.gandi.net (Postfix) with ESMTPSA id A9E43E000B; Fri, 16 Dec 2022 16:30:01 +0000 (UTC) From: Quentin Schulz To: Minas Harutyunyan , Greg Kroah-Hartman Cc: Quentin Schulz , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Bin Yang , Quentin Schulz Subject: [PATCH v2 0/2] usb: dwc2: fix USB peripheral role in dual-role mode on PX30 Date: Fri, 16 Dec 2022 17:29:27 +0100 Message-Id: <20221206-dwc2-gadget-dual-role-v2-0-0de821615dd3@theobroma-systems.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 X-Mailer: b4 0.11.0-dev-141d4 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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. Note that it is still not flawlessly working but the support is improved (somewhat working vs not working at all). To: Minas Harutyunyan To: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Bin Yang Signed-off-by: Quentin Schulz --- Changes in v2: - add "shadow" variable for HCD skip_phy_initialization so that it can be configured on a per-platform basis, - Patch 1 and Patch 2 of the v1 are already in linux-next next-20221216, so removed from this series, - Link to v1: https://lore.kernel.org/r/20221206-dwc2-gadget-dual-role-v1-0-36515e1092cd@theobroma-systems.com --- Quentin Schulz (2): usb: dwc2: allow platforms to prevent core phy initialisation usb: dwc2: prevent core PHY initialization on Rockchip drivers/usb/dwc2/core.h | 6 ++++++ drivers/usb/dwc2/hcd.c | 2 ++ drivers/usb/dwc2/params.c | 1 + 3 files changed, 9 insertions(+) --- base-commit: ca39c4daa6f7f770b1329ffb46f1e4a6bcc3f291 change-id: 20221206-dwc2-gadget-dual-role-aac67e6d42fd Best regards,