From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41B3C33B6F4; Fri, 24 Apr 2026 16:53:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777049590; cv=none; b=RZX5zFVM1Ar4zqP8z47YZWAc8k3aSQCsKp7fhawEVp7ZxpFTepWgTFFKg3/OPwZ3DDOsyQgEJx8FwwVv66otWXURm5iZRYrWf0l+oWe4wLyMvoRZqcssgEH7tTJFBP+24O2e+VJ8/0/cw2Om4OOfE0XcZtW3O/edMDsY/jUf4c0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777049590; c=relaxed/simple; bh=U3eMjz8fqE5xDfDDiLvLiGLv+C1PGv8TkNDHFHOgkic=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=G7QDx+MQHCWsGQoznW4pDa9Vu47IZHpOAtl01xNurk+a1awH+wRCRd0E1VdA4DbGbukw73+NzMBPyB1XHm637lVF3LwAPNyqQdYcszcRaFl8VystNZOoVoa9pcvdzkHk71WkIdWGBJlPbzLSedaKr/yqIk6BPE64iitBUsqaQHo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ulXVRxza; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ulXVRxza" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 418DDC19425; Fri, 24 Apr 2026 16:53:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777049590; bh=U3eMjz8fqE5xDfDDiLvLiGLv+C1PGv8TkNDHFHOgkic=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ulXVRxzaMo/7S7+U5BcmfO6IDiMjRAeJyBcFi6edRfBe0snoCijxGrFRwd1tSy18b 5nVaQ1gFHaG34akrwVBT9/G9761mgtMTHYeT/6D1E+kXMPyJPmn+tZ/K4EgzDXukn7 9BsoeHXFPWabqfsjHu8tYtQPocVck70d4tWzL43p8yJgjEXEGn40+6atYWyaPl12DO kydG0naAx6atQ9orpRaTxdEqoHlDuugcd1iOk46PHeLOLnXN+UrrW7WMydrjKhj83i jpQBB3xNcG8Ah5BgQlLSgo0ch3L5aAVGxaxrCBlpmevjVR3x2c9faRCU3n741p1j4I f0Dr3lfWqYc+A== Message-ID: <67f442f7-377d-46f3-82bc-86053e34c277@kernel.org> Date: Fri, 24 Apr 2026 18:53:02 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: remoteproc: xlnx: add auto boot feature To: tanmay.shah@amd.com Cc: andersson@kernel.org, mathieu.poirier@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, michal.simek@amd.com, ben.levinsky@amd.com, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260422202558.2362971-1-tanmay.shah@amd.com> <20260422202558.2362971-2-tanmay.shah@amd.com> <20260423-stimulating-markhor-of-masquerade-aac0a7@quoll> <2351c698-cf08-4037-9777-0820448a14d8@amd.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 23/04/2026 19:59, Shah, Tanmay wrote: > Ack, I will rename it to xlnx,auto-boot. > >>> >>>>> + type: boolean >>>>> + description: remote core is either already running or ready to boot >>>> >>>> And why is this property of a board? >>>> >>> >>> Not sure what indicates it is? The property is under remoteproc child >>> device that is SOC level property. Remote core is on same SOC wher linux >>> core is running. >> >> So it is implied by SoC compatible? Please provide some arguments why it >> cannot be implied by the SoC compatible. I gave you one way out, but if >> you disagree then no problem. >> > > So on some SoC, the bootloader supports loading and starting of the > remote processor. But it is totally user's choice. User can choose to > load & start one core of a cluster via bootloader and leave another core > powered-off. > That is why it is not possible to decide based on SoC compatible. OK. The problem is that "user" is a bit vague and usually user choice goes to user-space. The property will be set or unset for ALL of given boards. So all of the DTS->DTB. That's why it should be clear why all such boards should behave like you described. If this is truly user, as in user-space, choice, then DT is not the way. > > If we don't want to make it a device-tree property then I can implement > in a different way. New way will detect if the remote is running or not > via EMMI/SCMI call to the firmware, and take a decision based on that. > If this new way works, then I don't think we need auto-boot property at all. > > Let me know your thoughts. This works for me and solves my questions from DT point of view, but I cannot judge whether this makes sense for you. Best regards, Krzysztof