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 28D88C87FD1 for ; Tue, 5 Aug 2025 11:11:59 +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-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Date:References:In-Reply-To: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=JHDNbmOk6IeK+fJ4GGkS3gEg17jUkRH0OkVSzRfGV0w=; b=0pbCt2pwBTIMDM/9fJ0xngmdvw QeZZ3ajGhsTa035q3ZrohIvHfKHjdtCSUWtp7/oY2esCoFfsSEJYiZJnPl6tTr9uCfwIwfMZd1Bb5 weF55fy7FJ05gJhbv1gnbU8mj5tPssIKy24F2uLVe5OnB4lKa9Aoe0XoPN6KCMNqYeOy1bJoP/qLw Dph8L7ZGMATYvt6w0sAXCxYj3R1bhjbRkvaryIu5EwjdPvK+bD+RKEIGQUVRjyR5Gdh9svSJ/xX1k 9Hb/R5zROxDzkOeDHxT29LbZhaslOedt9tDtVX4Dwke1l3JDHZdGpithWmOVOPImbThkY02a/nUw2 OgpAwPWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ujFaC-0000000CZgn-2jmj; Tue, 05 Aug 2025 11:11:52 +0000 Received: from ni.piap.pl ([195.187.100.5]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ujFO6-0000000CYB1-0msy; Tue, 05 Aug 2025 10:59:24 +0000 Received: from t19.piap.pl (OSB1819.piap.pl [10.0.9.19]) by ni.piap.pl (Postfix) with ESMTPS id 31BA4C3EEAC9; Tue, 5 Aug 2025 12:58:06 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 ni.piap.pl 31BA4C3EEAC9 From: =?utf-8?Q?Krzysztof_Ha=C5=82asa?= To: Stefan Klug Cc: Dafna Hirschfeld , Laurent Pinchart , Heiko Stuebner , Paul Elder , Jacopo Mondi , Ondrej Jirman , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: FYI: i.MX8MP ISP (RKISP1) MI registers corruption In-Reply-To: ("Krzysztof =?utf-8?Q?Ha=C5=82as?= =?utf-8?Q?a=22's?= message of "Fri, 01 Aug 2025 14:19:56 +0200") References: <175308758352.3134829.9472501038683860006@localhost> <175326599663.2811177.16620980968274114885@localhost> <175344176070.2811177.10693943493658922992@localhost> Date: Tue, 05 Aug 2025 12:57:07 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250805_035922_394219_9FFECC99 X-CRM114-Status: UNSURE ( 5.58 ) X-CRM114-Notice: Please train this message. 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 Hi, just in case someone finds it helpful: SError Interrupt on CPU3, code 0x00000000bf000002 -- SError CPU: 3 UID: 0 PID: 40083 Comm: devmem Not tainted 6.15+ PREEMPT pstate: 60000000 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=3D--) Kernel panic - not syncing: Asynchronous SError Interrupt What did i do? Wrote 32-bit value to an ISP register (0x32E22E2E4C =3D a histogram-64 register) while repeatedly reading other ISP registers (in userspace). The video stream was active. This ISP apparently has its own problems. -- Krzysztof "Chris" Ha=C5=82asa Sie=C4=87 Badawcza =C5=81ukasiewicz Przemys=C5=82owy Instytut Automatyki i Pomiar=C3=B3w PIAP Al. Jerozolimskie 202, 02-486 Warszawa