From patchwork Thu Aug 4 15:09:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 12936486 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 409AFC25B0E for ; Thu, 4 Aug 2022 15:10:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239609AbiHDPKH (ORCPT ); Thu, 4 Aug 2022 11:10:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239405AbiHDPKE (ORCPT ); Thu, 4 Aug 2022 11:10:04 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0BB65FAD4; Thu, 4 Aug 2022 08:09:58 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 072ADB8258C; Thu, 4 Aug 2022 15:09:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30A8CC43140; Thu, 4 Aug 2022 15:09:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659625795; bh=Vy8BQdsOUtNpJFrloOqqbFFtv2vLCn4aaq5+a1H9MzE=; h=From:To:Cc:Subject:Date:From; b=tjQG295LZIwMUltwEaIpbkjsKTmq0E/k3l+ivcqehrmS0sLBYv6VEla/GasdxPHRj rOs/IIt3MaHwzEWyhpmGEEuu33gtTvLOPbE8mprH0K22RPFL3UEeuEuVh2kmYsPMYQ OJbGa5/Y9qhkcZU1kkW9Ged+2vqnjGdTuVqI7mAOR2pqkKkjngMINfWgurt1xYwd8/ GY1ypD+XkQ11kGry9eHeTDxk8hOuQTyKr2gUfDSnvuDE+n04t8Yn2/GXo33zMOE8ts 07QhhQ884SFaMmiMujOy9GvQRFG10eKws6vklhQWw4/kwU5dfMMkL1t2Oib9floWen QH3CWjDNL78qg== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1oJcUK-00069N-34; Thu, 04 Aug 2022 17:10:16 +0200 From: Johan Hovold To: Greg Kroah-Hartman , Felipe Balbi Cc: Rob Herring , Krzysztof Kozlowski , Andy Gross , Bjorn Andersson , Manivannan Sadhasivam , Konrad Dybcio , Krishna Kurapati , Stephen Boyd , Doug Anderson , "Matthias Kaehlcke" , Pavankumar Kondeti , quic_ppratap@quicinc.com, quic_vpulyala@quicinc.com, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH v2 0/9] usb: dwc3: qcom: fix wakeup implementation Date: Thu, 4 Aug 2022 17:09:52 +0200 Message-Id: <20220804151001.23612-1-johan+linaro@kernel.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This series fixes some of the fallout after the recently merged series that added wakeup support to the Qualcomm dwc3 driver: https://lore.kernel.org/all/1655094654-24052-1-git-send-email-quic_kriskura@quicinc.com/ The first patch fixes a long standing PHY power sequencing issue in dwc3 core. The second patch reverts a power-domain hack that was added by the above series. There are other ways to implement this which doesn't violate the genpd interface, and if for some reason those are not sufficient, the genpd implementation needs to be extended, not hacked around. The third patch fixes a build breakage caused by the same series. (new in v2) The fourth patch fixes another long-standing bug which could lead to a use-after-free when using runtime PM. (new in v2) The next patch fixes another issue in the Qualcomm dwc3 implementation that has been added a while back and which breaks runtime PM. The sixt patch fixes a NULL-pointer dereference or use-after-free when suspending controllers in peripheral or OTG mode due to a hack that was added to suspend path. Unfortunately, it seems the hack needs to stay for now if we want functioning suspend on some Qualcomm platforms. The remaining patches moves the wakeup-source property over from the core node to the glue node in the binding and instead propagates the wakeup capability to the former during probe. Note that this incidentally also avoids adding probe-deferral hacks to the driver as was recently proposed to deal with another problem with the current implementation: https://lore.kernel.org/all/1657891312-21748-1-git-send-email-quic_kriskura@quicinc.com/ With this series I have functioning USB system suspend and wakeup as well as somewhat functioning runtime PM in host mode on sc8280xp. Note that the PHYs apparently do not not to be left enabled for wakeup on this platform. Some issues remain such as that root-hub connect/disconnect events cannot selectively be disabled. And of course, the suspend speed hack needs to be replaced at some point but that likely requires some more heavy lifting in the dwc3 implementation. Johan Changes in v2 - add review and ack tags - fix a gadget-only build breakage (new patch) - fix a use-after-free on wakeup from runtime suspend (new patch) - disable wakeup completely instead of falling back to the "disconnected" host configuration when not acting as host - disallow 'wakeup-source' in child node in the binding Johan Hovold (9): usb: dwc3: fix PHY disable sequence Revert "usb: dwc3: qcom: Keep power domain on to retain controller status" usb: dwc3: qcom: fix gadget-only builds usb: dwc3: qcom: fix use-after-free on runtime-PM wakeup usb: dwc3: qcom: fix runtime PM wakeup usb: dwc3: qcom: fix peripheral and OTG suspend dt-bindings: usb: qcom,dwc3: add wakeup-source property usb: dwc3: qcom: fix wakeup implementation usb: dwc3: qcom: clean up suspend callbacks .../devicetree/bindings/usb/qcom,dwc3.yaml | 5 + drivers/usb/dwc3/core.c | 24 ++--- drivers/usb/dwc3/dwc3-qcom.c | 96 +++++++++++-------- drivers/usb/dwc3/host.c | 1 + 4 files changed, 76 insertions(+), 50 deletions(-)