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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 2525AC02198 for ; Thu, 6 Feb 2025 15:20:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 952C010E895; Thu, 6 Feb 2025 15:20:56 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="oW8nTiJh"; dkim-atps=neutral Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8205510E895 for ; Thu, 6 Feb 2025 15:20:54 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id A325E44273; Thu, 6 Feb 2025 15:20:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1738855252; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YeCsnrKozW+jD4dro64DNaKKFt/Ebupy7eycXyiOkJQ=; b=oW8nTiJhBjjdEHbhhMgejcQQeOc4PWIu1KYYLGOI5+7qsJWElCruy9O/VxFiGvonMs/aRm Q+0+WlRJxz2zOdYXbHPQW6aGQKisAptuMQXairavgw5ws1vDR6FQRduGA//rH7IGuG3e6R gbG4s+Pnb6xYU5t3H7Mu07gZvbxEEqqTiXDpc4nWuGx/RmMaagb8V8mLDppT780ZMI3Wj+ 3+A6IxRHU5hJk58yH/n7p0FzR3kIIiog1OXXzUmuxcEEgEWcZreMQZvdKv6JZTlM+6dXM1 tOqE/tzys3p1B6fO0vzeATyukW2uHmcRmDFwvjlyZBLrUEPH8+CSk1XKo99FXg== Date: Thu, 6 Feb 2025 16:20:48 +0100 From: Herve Codina To: Alexander Stein Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dave Stevenson , =?UTF-8?B?TWHDrXJh?= Canal , Raspberry Pi Kernel Maintenance , Marek Vasut , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Louis Chauvet , Luca Ceresoli , Thomas Petazzoni Subject: Re: [PATCH v5 4/4] drm: bridge: ti-sn65dsi83: Add error recovery mechanism Message-ID: <20250206162048.1f159ba6@bootlin.com> In-Reply-To: <3605739.aeNJFYEL58@steina-w> References: <20250203161607.223731-1-herve.codina@bootlin.com> <20250203161607.223731-5-herve.codina@bootlin.com> <3605739.aeNJFYEL58@steina-w> Organization: Bootlin X-Mailer: Claws Mail 4.3.0 (GTK 3.24.43; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddvieejfecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhepfffhvfevuffkjghfohfogggtgfesthekredtredtjeenucfhrhhomhepjfgvrhhvvgcuvehoughinhgruceohhgvrhhvvgdrtghoughinhgrsegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeeviefffeegiedtleelieeghfejleeuueevkeevteegffehledtkeegudeigffgvdenucfkphepvdgrtddumegvtdgrmedvgeeimeejjeeltdemvdeitgegmegvvddvmeeitdefugemheekrgenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtudemvgdtrgemvdegieemjeejledtmedviegtgeemvgdvvdemiedtfegumeehkegrpdhhvghloheplhhotggrlhhhohhsthdpmhgrihhlfhhrohhmpehhvghrvhgvrdgtohguihhnrgessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepvdehpdhrtghpthhtoheprghlvgigrghnuggvrhdrshhtvghinhesvgifrdhtqhdqghhrohhuphdrtghomhdprhgtphhtthhopegrnhgurhiivghjrdhhrghjuggrsehinhhtvghlrdgtohhmpdhrtghpthhtohepnhgvihhlrdgrrhhmshhtrhhonhhgsehlihhnrghrohdrohhrghdprhgtphhtt hhopehrfhhoshhssehkvghrnhgvlhdrohhrghdprhgtphhtthhopefnrghurhgvnhhtrdhpihhntghhrghrthesihguvggrshhonhgsohgrrhgurdgtohhmpdhrtghpthhtohepjhhonhgrsheskhifihgsohhordhsvgdprhgtphhtthhopehjvghrnhgvjhdrshhkrhgrsggvtgesghhmrghilhdrtghomhdprhgtphhtthhopegrihhrlhhivggusehgmhgrihhlrdgtohhm X-GND-Sasl: herve.codina@bootlin.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Alexander, On Thu, 06 Feb 2025 15:38:42 +0100 Alexander Stein wrote: ... > With interrupt configured I got the following stack trace upon > reboot/poweroff: > > [ 91.317264] sn65dsi83 2-002d: reset the pipe > [ 91.344093] Unable to handle ke > ** replaying previous printk message ** > [ 91.344093] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 ... Ouch :( One question to help me investigating: Do you have the issue at init/probe or when you start to display graphics? Best regards, Hervé