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 87311CD6137 for ; Mon, 9 Oct 2023 21:04:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ve/BYBzJn5aVtV/kN8Bl45DbxpC0uQmW/ElSxZjWR1E=; b=uolLElEhoQFGGq m/EInCxEBfbU//uol+GiikNuX/sGCBzJP1aF9DEb8ZntKfwcqwLSSMcilkEBuiMmdgdN4SgzkiOdY 0XoeH6WgW68Sg+V5LokFsdUSs+2CuO1AU8Attl9tIeG6qvke5UwHhHFc71pe70ZgLBD5mUdtkOI98 0p/L8qWYnACSMSvruxxsRWEgxbrDl3agEos4LBtynSQvRgBZGMrNu22NjfpwuCnA4s95v3GPvCEna 9OCR+FxXHAMpJA4oVwgIVlf6flvtuYtvZ1UT7wLlZwa1814nlyJnlEH1VXxzM4rnFRtGt373NNLnx 8JYuTGX2hUaOUpXCXnSQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qpxPv-00BcYH-1L; Mon, 09 Oct 2023 21:03:55 +0000 Received: from mail-lj1-x234.google.com ([2a00:1450:4864:20::234]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qpxPt-00BcXo-0J for linux-arm-kernel@lists.infradead.org; Mon, 09 Oct 2023 21:03:54 +0000 Received: by mail-lj1-x234.google.com with SMTP id 38308e7fff4ca-2c186ea81c7so63505951fa.1 for ; Mon, 09 Oct 2023 14:03:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1696885427; x=1697490227; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=43JczQhR06svhP3+MFO67a4XDgSpc7xK7wWPqbVY3mc=; b=nt9Mvhm/ILCgt8OV+n8kUojhnGemH2MIQCpXOh68Tc2LnQ4IHlIIGfK5qIypRR2CI2 kgsn9e25VA7l09D4wHJwLPGvlnwV4beGZzXwMz0BsADvdxdsfi/BtUN4QyEDjfzf3cnj cfVc/9SrM2UZIwRcQL83ge3Ne7oVkf6ZAzrrSlQF9t8G8JmcrLa+mtcMetRutxGvlCMy S0o7/SNIUP3VHvkKRueeE9KJOmv0tARHdMeYizuK47GywVR8pMrzQbmrF30uKbRgKs2u EWpmOzqp/qib7j1Zwa9TIUWgC3ahBAQEMzngbFUsCQ/gguW/mOR1fleItdOSiEAyT+Go lbCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696885427; x=1697490227; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=43JczQhR06svhP3+MFO67a4XDgSpc7xK7wWPqbVY3mc=; b=pdpGT02KzxvmBh8KS+LD6s6I3egbyMsjpcfUmzCN9yMS8TdtC6/v7qYOV++oUOB+nu A3fcGLrwh52TtWfLNsME7hLSzQ8eMQYAzlQEL1oOM92UUEA6kZsdWh3OYVegiCKJmD0k 0UU2a9oGW+m1TzX50cXtnzdXf23/Gz+3h968ofxXqJxBOodQ7eBBH6OonExLjUzAo+mp GU9r4ZeLtzyR04ywMuEKPA2RetPYzqxMInRGZ+FmqwAyLnlKHLmLvfa6+0HhSpQFY7TK 3CiBYEdh9Fc3+87rB2NJ6SYkxByWl+WhztpUOnRQbIsRa07Kfpl6V+dDqELBfhif3CLb OxRg== X-Gm-Message-State: AOJu0YwAdO1gWI8anQycMgCSE/dy+GTFzOpJFoJ7wIwAX+E5zDqQQSC2 1C9PNGFdQ6y8AXPRJxbU7ssSdA== X-Google-Smtp-Source: AGHT+IFMY7QqUdgo8VEEaNfc3AJxOGVDc5LmcHQuYLgMIPjPJlsAadiflZalp6ZB8QmqLruGsgB5CQ== X-Received: by 2002:a05:651c:104:b0:2c0:240:b564 with SMTP id a4-20020a05651c010400b002c00240b564mr13779157ljb.15.1696885427576; Mon, 09 Oct 2023 14:03:47 -0700 (PDT) Received: from [172.30.204.90] (UNUSED.212-182-62-129.lubman.net.pl. [212.182.62.129]) by smtp.gmail.com with ESMTPSA id a19-20020a05651c011300b002bff365c7bfsm2155195ljb.35.2023.10.09.14.03.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 09 Oct 2023 14:03:47 -0700 (PDT) Message-ID: <0a039a5a-46c8-4f63-a9e4-fd5b197340ab@linaro.org> Date: Mon, 9 Oct 2023 23:03:45 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/2] dt-bindings: arm: Add new compatible for smc/hvc transport for SCMI Content-Language: en-US To: Nikunj Kela , Sudeep Holla Cc: cristian.marussi@arm.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, andersson@kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20230718160833.36397-1-quic_nkela@quicinc.com> <20231006164206.40710-1-quic_nkela@quicinc.com> <20231006164206.40710-2-quic_nkela@quicinc.com> <20231009144154.vfx5caqxtyezulxx@bogus> From: Konrad Dybcio In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231009_140353_156743_DF94CA0F X-CRM114-Status: GOOD ( 15.71 ) 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: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 10/9/23 16:52, Nikunj Kela wrote: > > On 10/9/2023 7:41 AM, Sudeep Holla wrote: >> On Fri, Oct 06, 2023 at 09:42:05AM -0700, Nikunj Kela wrote: >>> Introduce compatible "qcom,scmi-smc" for SCMI smc/hvc transport >>> channel for >>> Qualcomm virtual platforms. >>> >>> This compatible mandates populating an additional parameter >>> 'capability-id' >>> from the last 8 bytes of the shmem channel. >>> >> While I am happy with the simplification here, I am also bit nervous how >> long before Qualcomm abandons this. I hope this is adopted as is in all >> internal and downstream code without any modifications and this is not >> just a push for upstreaming some change to minimise delta with internal/ >> downstream code. >> >> -- >> Regards, >> Sudeep > > Qualcomm is using patch on all the virtual auto platforms using > shmem/doorbell as scmi channel. This is already being used without any > modifications in our downstream code. No delta for this patch series. > Thanks! AFAICT Sudeep is looking for a solid guarantee that it will continue to be used as-is, on more than one platform and on more than one BSP version. There have been cases where such firmware interfaces had silent ABI breaks (or were replaced altogether) between qc downstream branches and this would be unacceptable. Understandably, having a unified means of communication for *all* Qualcomm chips (i.e. not only auto) going forward would likely be expected.. Konrad _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel