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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6253BCAC583 for ; Tue, 9 Sep 2025 17:17:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zZ7ADGFgnAwZfafO2JUodzSZZilfqJT8n7SBJm89wNk=; b=hBvBUieGalzjBTIp9+JggioQ3N vhiN9sGls6+oaOftoQOMhjVZ9o7m6g9WKQ5Vi93A4JpGlv4oGMOiuKJy4AgU9OiUeIYjEiH93BsMI GCQ6mZ53HTlKEfxbgyxKAm2C5hmXJLawcheOfArmcjHuTnirVOsALtBbVai1y//Tk5tSlh9h0mZ/W Le8FQFiUw3Xo65QJeCurbvfTtlt1xUXBDm/eYC5HFznPs9T6wq4YsbiuxyTT5hVJ23FkzErdYU1iW cftsYV26q9oz0UYieee+WVwltO1TqA8Ur5oTSubvhV85nFIc4/wCDspKCxO8x/3RLoPLiVJlqZRIf CfYIj/zQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uw1yW-00000008rs2-10va; Tue, 09 Sep 2025 17:17:48 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uvxoD-00000007BxX-1lmN for linux-arm-kernel@lists.infradead.org; Tue, 09 Sep 2025 12:50:54 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Reply-To; bh=zZ7ADGFgnAwZfafO2JUodzSZZilfqJT8n7SBJm89wNk=; b=mk/wvg0a0yuXY15yC0ROqz+TqB k4U+7c4HappQzKDL+GFKJnlYiJdz52zZornV8UKrlHoCIBxwrdWfpaN3kDhwjBZk5xvdgX2BwvoqM E7ChTwu4dZEnmMJs+tkoU/ELVMcuQmkhDyhpxMfREYrlh9kt3JTmwv2JMqwzTNZEoO5Zxt7a9+Tqi 97kuig3Bdpn9UxLyp8MhEf7LBk8auxlgPqxL7lf50lhIj1+SxzjYCKoCI4pHlET81p+fMEr8HnEXR In4dXmZ2F8P0jiCtEtcyYzFFZVb0EHonkPmaazx9lt/491sHVhPzDZcTNrrOAHRsHbI+HxcEZUdMv 4CYrjC4g==; Received: from i53875b3d.versanet.de ([83.135.91.61] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1uvxnv-0001FU-6Y; Tue, 09 Sep 2025 14:50:35 +0200 From: Heiko =?UTF-8?B?U3TDvGJuZXI=?= To: Geert Uytterhoeven , Nicolas Frattaroli , Saravana Kannan , linux-pm@vger.kernel.org, Ulf Hansson Cc: Stephen Boyd , "Rafael J . Wysocki" , Sebastian Reichel , Sebin Francis , Diederik de Haas , Bjorn Andersson , Abel Vesa , Peng Fan , Tomi Valkeinen , Johan Hovold , Maulik Shah , Michal Simek , Konrad Dybcio , Thierry Reding , Jonathan Hunter , Ulf Hansson , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/5] pmdomain: rockchip: Fix regulator dependency with GENPD_FLAG_NO_STAY_ON Date: Tue, 09 Sep 2025 14:50:34 +0200 Message-ID: <3633992.V25eIC5XRa@diego> In-Reply-To: <20250909111130.132976-3-ulf.hansson@linaro.org> References: <20250909111130.132976-1-ulf.hansson@linaro.org> <20250909111130.132976-3-ulf.hansson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250909_055053_460556_CA370285 X-CRM114-Status: GOOD ( 13.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am Dienstag, 9. September 2025, 13:11:21 Mitteleurop=C3=A4ische Sommerzeit = schrieb Ulf Hansson: > The deferred regulator retrieval for Rockchip PM domains are causing some > weird dependencies. More precisely, if the power-domain is powered-on from > the HW perspective, its corresponding regulator must not be powered-off v= ia > regulator_init_complete(), which is a late_initcall_sync. >=20 > Even on platforms that don't have the domain-supply regulator specified f= or > the power-domain provider, may suffer from these problems. >=20 > More precisely, things just happen to work before, because > genpd_power_off_unused() (also a late_initcall_sync) managed to power-off > the PM domain before regulator_init_complete() powered-off the regulator. >=20 > Ideally this fragile dependency must be fixed properly for the Rockchip PM > domains, but until then, let's fallback to the previous behaviour by using > the GENPD_FLAG_NO_STAY_ON flag. >=20 > Link: https://lore.kernel.org/all/20250902-rk3576-lockup-regression-v1-1-= c4a0c9daeb00@collabora.com/ > Reported-by: Nicolas Frattaroli > Cc: Heiko Stuebner > Cc: Sebastian Reichel > Fixes: 0e789b491ba0 ("pmdomain: core: Leave powered-on genpds on until sy= nc_state") > Fixes: 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until la= te_initcall_sync") > Signed-off-by: Ulf Hansson NPU on rk3588 now again correctly gets its supplying regulator and running said npu does not end up in a kernel panic :-) Tested-by: Heiko Stuebner Acked-by: Heiko Stuebner