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 A334CD35177 for ; Wed, 1 Apr 2026 12:35:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zM7ZrwTVbM7A7sXITDmdl3zT3STRdCja3psCVwQBvOE=; b=voMNAdQx74FlxNVtgwvv1BzPTH vsqm8MiU1QXWOPqnTXvjSKTbaIADSMKCyDrwGlBUB5mn7LqQKmG6DOe8JHmDy6HX8sL1lGtYdCboY nPqPsmi1Bu1uMAXFL9aJP5hkvhC2OgkFBlGTsE3X1Tdvy6eOkoSiLrJxDyc/ZubzmQAVXOsT8xKUw hZ2FaqdEQnbow4P76g2m5wiTwdE5heZRCYEfty/m8e/IdG48TkSpzc/ZE30chjCHpLWcNuXtPxrgl vepioOzbl0CNUY3DJYb/Pdpm4DPJWjTGSknvOIMuRQJ+5R3JkKg0ctXpQLCxNFFsikg/U9QHP78+l tSNkeoyw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7unI-0000000FAia-3SzS; Wed, 01 Apr 2026 12:35:39 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7uJz-0000000Eoqy-2yIs; Wed, 01 Apr 2026 12:05:19 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 15D9F60125; Wed, 1 Apr 2026 12:05:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B35BC4CEF7; Wed, 1 Apr 2026 12:05:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775045118; bh=zM7ZrwTVbM7A7sXITDmdl3zT3STRdCja3psCVwQBvOE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=r6GeRp8oY1/srl2at4CKdF3oOt/gYlbzGS1q3sjInPALeebzj2sItiX7irtiqnuj0 5sP/1v8qqnCn+iRdf67KhDOjPqjN+aRJWaNANT9WIUzCYAypL9llFawc6ZsrKoV5Us 9fK9cwpxVWer0FXiyBlE4hOXitPZriZ9bhuoXRywOPs12EkVjiK5mcyeNpzL/7vu5y eewCEzbQXhgbMF8Zamc0LCvc/0qJlq50XvjX1BKd2o/IdeG7r0FVOcl+IVI/trlzVK U+N6jok/FHGfmdxYl9xkWkrJc9WTP7BM7hLLGa2NAMi9dHgh1+p37v1kYOUxPO6TZa mJNBvOeHdx/Rw== Date: Wed, 1 Apr 2026 13:05:13 +0100 From: Mark Brown To: =?iso-8859-1?Q?Ma=EDra?= Canal Cc: Michael Turquette , Stephen Boyd , Florian Fainelli , Broadcom internal kernel review list , Maxime Ripard , Stefan Wahren , Dom Cobley , Dave Stevenson , linux-clk@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, kernel-dev@igalia.com Subject: Re: [PATCH] clk: bcm: rpi: Mark VEC clock as CLK_IGNORE_UNUSED Message-ID: <2d0f6816-9d9e-43ed-aef7-bde8bc1872c7@sirena.org.uk> References: <20260401111416.562279-2-mcanal@igalia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="e6b9dxVBnakBny6W" Content-Disposition: inline In-Reply-To: <20260401111416.562279-2-mcanal@igalia.com> X-Cookie: "Yo baby yo baby yo." 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 --e6b9dxVBnakBny6W Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 01, 2026 at 08:13:57AM -0300, Ma=EDra Canal wrote: > On Raspberry Pi 3B, the VEC clock is used by the VideoCore firmware > display driver, which remains active until the vc4 driver loads and > sends NOTIFY_DISPLAY_DONE. If this clock is disabled during boot, a bus > lockup happens and the firmware becomes unresponsive, causing a complete > system lockup. >=20 > Mark the VEC clock with CLK_IGNORE_UNUSED so it survives the unused > clock disablement and remains available until the vc4 driver takes over > display management. Tested-by: Mark Brown --e6b9dxVBnakBny6W Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmnNCfgACgkQJNaLcl1U h9CGVQf8DyFbImg+H8bmRjt4+lXKBNm6HuSMV4HQgvSsGwXKzGKiHS8EJrNSBjxT f5jsPfx2fXnB++M9AMVko66vCfw8oh6phtIxMQyFpI+eeYe2NxEM/sP6eoBxDm0b bdlwmqYiCxetqVGXzVNDNtP+3b+VYGoe14xPOTvL9znUIq/PKqxNmY/fAsQl1eq+ mD7W9hlCF8yxh77RoZ4tMwtKjy4Qlcx5/eItUwKK4+FhWIU/XBeEPyJ0rYEDh3cc Wb3kyEgpPaRdpaKvN0Kbk/nsvpL5kBgpUkqtjfR6/CTla7zmfZ8p7+ewLoGhQZmE SUAHnzj0mknHS45KFK+XGyOQTZAJdg== =LSrV -----END PGP SIGNATURE----- --e6b9dxVBnakBny6W--