From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A3212F2619; Tue, 21 Oct 2025 11:07:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761044839; cv=none; b=snfDXdQP2bTmhW8iMdwAPgndyWS1+9nf9Xpwy4MaypkXYLLY6orkcMyQS0BICuMP+4TynRUsu4qiUKDT00+fX6Po7xGRhkSYq2f54Gsh29pxYC8KOLfsUKdAnAC33fF8onhifqpydQMFQipdLEi5Y21PTuJRkaGL6knLfAS3Mp0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761044839; c=relaxed/simple; bh=n9l01WVOdLYsNtWLeGEEkur1oK8Lb6bJ3MmOA1JZiig=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TWFzQLHhO+RLjDw49eeSDaVp9ATlmiNwdYzI8LCZNPj1877NMLMqPU0UDBeXzipOyqcREs+jKLzULFH7NbdDfHXBmGXMTyqoeGeMvLKW8Bdfb22DQTfHXN6+bU/hfFjNVwI8I7ScQcclNX0iA39ky0HbmtXT2oP+YSStuyRw0P8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=OtoMAP7n; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="OtoMAP7n" 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> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1a849a0b515c77faebe28456d6537d39d4ca32d0.camel@ew.tq-group.com> 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