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 9AC6ECCD1A5 for ; Tue, 21 Oct 2025 11:07:25 +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=Pwk8DjJA8z0oysJkbtvk8bhihXS0Rs1EqYDINNJtUYQ=; b=tQWpkW9iVdIkwKN402BEKVg0r0 TUC3OHmnQU58mDnuQcA3qOJz24KSwqA7BSk9+bLuHxLk+ZlVaIbDco+tMAEhvko6juY/4xOU2zIdk bXBl47bv5qDuNS+RIL6V52ImLMFRqOpLY3bI0uONVMvCjgncj/Wa/uCbR0tTA9SB2kLVBAWvjy5nW O9E9Zc/mXy5YFdg9tioa1uj9n0JgGTEkvN2RWCt9QVaRklkTf8G6tFUx7BB42nU0Cdekgyvr3qFP7 aONReuSkjFghf97lKxd0abf53r3roAC6MthWQs36PiO9E+UACEdG8yoX8XRFrQbga1FT3v4PeX80C 3094M3Kw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vBAD2-0000000GigQ-1jgo; Tue, 21 Oct 2025 11:07:20 +0000 Received: from mail11.truemail.it ([217.194.8.81]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vBACz-0000000Gig2-2ify for linux-arm-kernel@lists.infradead.org; Tue, 21 Oct 2025 11:07:18 +0000 Received: from francesco-nb (248.201.173.83.static.wline.lns.sme.cust.swisscom.ch [83.173.201.248]) by mail11.truemail.it (Postfix) with ESMTPA id 03BB61F83F; Tue, 21 Oct 2025 13:07:13 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1761044835; bh=Pwk8DjJA8z0oysJkbtvk8bhihXS0Rs1EqYDINNJtUYQ=; h=From:To:Subject; b=OtoMAP7nFhJluGnIc3sDNdXjGWYpJaez2TDKP0ZmPxYsijtx3eHfzWXyvZMYXox6T nz5KMvxUbJlLumhO/ydCbevrpqttlVuWEZrGcy86glWsMeY2HPqEMwFGtda1VL1Ovw VWHYcACHoezmtNDUaIDeCrVyRA+SvporIMJoAfcmJe6yaLdbDRXQJxD3uOvm+loVYb npNGjPMXuvne9ZPSg7N2I4iWgzDC4XkYtyF6I7ZNfrlZV9VKN7ddFvU00HRo1vr/6C y+THkqeb6aaYN6ExTXihWGWvyVzneq/aoOL6f1BBgsUvVgFt6KByfva+pJLk3fLmMA TwuD1njbb8LSw== Date: Tue, 21 Oct 2025 13:07:10 +0200 From: Francesco Dolcini To: Matthias Schiffer Cc: Beleswar Prasad Padhi , Francesco Dolcini , Hiago De Franco , nm@ti.com, vigneshr@ti.com, kristo@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, afd@ti.com, u-kumar1@ti.com, hnagalla@ti.com, jm@ti.com, d-gole@ti.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Robert Nelson , =?iso-8859-1?Q?Jo=E3o_Paulo_Gon=E7alves?= , Emanuele Ghidoli , Francesco Dolcini , Logan Bristol , Josua Mayer , John Ma , Nathan Morrisson , Garrett Giordano , Matt McKee , Wadim Egorov , Max Krummenacher , Stefan Eichenberger , Hiago De Franco , Diogo Ivo , Li Hua Qian , Jan Kiszka , Baocheng Su , Benedikt Niedermayr , regressions@lists.linux.dev Subject: Re: [REGRESSION] Suspend to RAM does not work anymore with k3-am62-ti-ipc-firmware.dtsi Message-ID: <20251021110710.GA40034@francesco-nb> References: <20251021093420.GA28462@francesco-nb> <1a849a0b515c77faebe28456d6537d39d4ca32d0.camel@ew.tq-group.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1a849a0b515c77faebe28456d6537d39d4ca32d0.camel@ew.tq-group.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251021_040717_844149_1A71D0B1 X-CRM114-Status: GOOD ( 22.73 ) 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 On Tue, Oct 21, 2025 at 12:06:32PM +0200, Matthias Schiffer wrote: > On Tue, 2025-10-21 at 15:26 +0530, Beleswar Prasad Padhi wrote: > > On 21/10/25 15:04, Francesco Dolcini wrote: > > > On Tue, Oct 21, 2025 at 02:33:10PM +0530, Beleswar Prasad Padhi wrote: > > > > On 20/10/25 19:47, Hiago De Franco wrote: > > > > > DM R5 sends a message that is never consumed, since no firmware is > > > > > running on the M4 (the core is offline). > > > > > > > > May I know why you are not running any firmware on the M4 > > > > rproc? If the intention is just to run the DM R5 core on the SoC, > > > > you can disable the IPC by NOT including the > > > > "k3-am62-ti-ipc-firmware.dtsi". That was the motivation for the > > > > refactoring. > > > Verdin AM62 and AM62P are generic SoMs, that can be used for a multitude > > > of different use cases. And not having anything running on the M4 is the > > > default use case. > > > > > > If not having anything on M4 is the default use case, it should > > be marked as "status=disabled" in the DT. > > > > > > > > I think having the node in the DT is the correct way forward, if you > > > want to start the M4 firmware you need such a node, so this is enabling > > > a valid and useful use case. > > > > > > Having the node is fine, you can still choose to keep it > > disabled by default. > > I agree with Francenso that it would be nice to keep the node enabled by default > - whether something is running on the M4 can be controlled via sysfs after all, > and may change over the runtime of the OS. In addition, from what I know, this is required even if you want to to start the firmware of the M4 from U-Boot. Francesco