From patchwork Tue Sep 10 17:57:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Reichel X-Patchwork-Id: 13799188 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 877E9EDE9AD for ; Tue, 10 Sep 2024 18:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=3WV3czR16fnIjoV+vVIKBG4hBPDhW3LP+mrC6P455UI=; b=y2kBjgTxQ530mC IhjaSybOhU3hoK011tEFFJczKgUK2q0bvvoBmUgQY9+2LlIsXeevzKQ4alVScR2XW8JfHpBHsQSR5 7uVca1G1McdY/oWrbBwFi49KhB83X7SIVQ4wv+BBCCgGpFbvVsGYmItNqXPxwd7c4Xd/oYRk0wa/N bB1li60yIPcVLSmL45rzeolma8i7bL9zNOxEIfZU8LygkWeY7YeBYiUntm40UVvz3QkSFxRfn1L3T V2XdGx6q9y6UJuRnqSOt/ZuuSgLz7QyalmBwTCrcEmUMXEBJH7ITBaOyYx7b4n1vpB/goR9H7u0rJ 3gAkSbYBLKlILRJ5yGoA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1so5FE-00000006h93-1vqv; Tue, 10 Sep 2024 18:05:40 +0000 Received: from bali.collaboradmins.com ([148.251.105.195]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1so5F8-00000006h5m-1G52 for linux-rockchip@lists.infradead.org; Tue, 10 Sep 2024 18:05:36 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1725991531; bh=MeN1i+aab0NQ3JQYuaxoKtvqWnyl4os7c4ARpZBGstw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i/8jHUS5okXgNF3JAi1jU6cygrU6Opm/B80l6yR1Sw9wzOW12AHMZe2nUloYKVls0 RX0sfj8KWEdmA4oQA3sf8APJZOjKixPYMeOexlE2C/WH6StB71OJLT2wTgAHZohvWN ZpB2jHBTxnrzA3iZyG1ZZizKkKkb0aUCCkqxsWN1iBfMJZ352ImfxYhUd4y2KPKP/C lSCMhExjqPNUpKJdfgLZR9IRDpn6hRUfZhzxRp3mvm4tCP5gSywZdk9eQ3XWoLax8z 1GVgSRPoNlTkvI7tonujtNsTkKVux1HbxLanySPDiccaI09rUmVGsc7sBvOhLIWHKf VJMvN6SrZzzsw== Received: from jupiter.universe (dyndsl-091-248-215-127.ewe-ip-backbone.de [91.248.215.127]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sre) by bali.collaboradmins.com (Postfix) with ESMTPSA id D192117E35FA; Tue, 10 Sep 2024 20:05:31 +0200 (CEST) Received: by jupiter.universe (Postfix, from userid 1000) id 8C3084800E4; Tue, 10 Sep 2024 20:05:31 +0200 (CEST) From: Sebastian Reichel To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Ulf Hansson Cc: Elaine Zhang , =?utf-8?q?Adri=C3=A1n_Mart?= =?utf-8?q?=C3=ADnez_Larumbe?= , Boris Brezillon , devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Sebastian Reichel , kernel@collabora.com Subject: [PATCH v1 1/6] pmdomain: rockchip: forward rockchip_do_pmu_set_power_domain errors Date: Tue, 10 Sep 2024 19:57:10 +0200 Message-ID: <20240910180530.47194-2-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240910180530.47194-1-sebastian.reichel@collabora.com> References: <20240910180530.47194-1-sebastian.reichel@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240910_110534_531135_47754E7C X-CRM114-Status: GOOD ( 16.92 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Currently rockchip_do_pmu_set_power_domain prints a warning if there have been errors turning on the power domain, but it does not return any errors and rockchip_pd_power() tries to continue setting up the QOS registers. This usually results in accessing unpowered registers, which triggers an SError and a full system hang. This improves the error handling by forwarding the error to avoid kernel panics. Signed-off-by: Sebastian Reichel Reviewed-by: Heiko Stuebner --- drivers/pmdomain/rockchip/pm-domains.c | 35 +++++++++++++++++--------- 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c index 9b76b62869d0..0f44d698475b 100644 --- a/drivers/pmdomain/rockchip/pm-domains.c +++ b/drivers/pmdomain/rockchip/pm-domains.c @@ -488,16 +488,17 @@ static int rockchip_pmu_domain_mem_reset(struct rockchip_pm_domain *pd) return ret; } -static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd, - bool on) +static int rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd, + bool on) { struct rockchip_pmu *pmu = pd->pmu; struct generic_pm_domain *genpd = &pd->genpd; u32 pd_pwr_offset = pd->info->pwr_offset; bool is_on, is_mem_on = false; + int ret; if (pd->info->pwr_mask == 0) - return; + return 0; if (on && pd->info->mem_status_mask) is_mem_on = rockchip_pmu_domain_is_mem_on(pd); @@ -512,16 +513,21 @@ static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd, wmb(); - if (is_mem_on && rockchip_pmu_domain_mem_reset(pd)) - return; + if (is_mem_on) { + ret = rockchip_pmu_domain_mem_reset(pd); + if (ret) + return ret; + } - if (readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on, - is_on == on, 0, 10000)) { - dev_err(pmu->dev, - "failed to set domain '%s', val=%d\n", - genpd->name, is_on); - return; + ret = readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on, + is_on == on, 0, 10000); + if (ret) { + dev_err(pmu->dev, "failed to set domain '%s' %s, val=%d\n", + genpd->name, on ? "on" : "off", is_on); + return ret; } + + return 0; } static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on) @@ -546,7 +552,12 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on) rockchip_pmu_set_idle_request(pd, true); } - rockchip_do_pmu_set_power_domain(pd, power_on); + ret = rockchip_do_pmu_set_power_domain(pd, power_on); + if (ret < 0) { + clk_bulk_disable(pd->num_clks, pd->clks); + mutex_unlock(&pmu->mutex); + return ret; + } if (power_on) { /* if powering up, leave idle mode */