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Thu, 5 Mar 2020 12:27:09 -0500 Received: by mail-pl1-f195.google.com with SMTP id b22so2900917pls.12; Thu, 05 Mar 2020 09:27:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=hM+3hR3nYd1ZUs9brVuH0Yagy5ovOQGBqoH01WL3Fwo=; b=hWquPoinrb/xmUBjZEO5Tl6AvaMrbUGWw2qwxqKPUsKZ93yuYotF2uNyNB7V7nA0Uk /Fmqcfy6aJY1yn0qNFgeoJJiG/slDXU2FiF3cAKxy5g2mphUGhOQMnNlCDWdHlnk7TlU yBA5VZNHC3M23velbLEvaWyjGFCUHM/c1pk33oVkTtaTu1yyVRiIL78J4DVKFGliXsVK Wm2X9Qr1fCEa/t0XiTDfm0CAYbKAITivDUdU3bU4xJVBk2rzcT4z1XRV/a6jzkRcZ4ll iMtGR3PzincB7avp6walxKzqXKNqupexTYrFKZiG9lLvLQGdSUgBgL3mbSAggx+ppTPH FWgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200305160613.GA53631@bogus> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 3/5/20 8:06 AM, Sudeep Holla wrote: > On Thu, Mar 05, 2020 at 11:25:35AM +0000, Peng Fan wrote: > > [...] > >>> >>> Yes, this may fix the issue. However I would like to know if we need to support >>> multiple channels/shared memory simultaneously. It is fair requirement and >>> may need some work which should be fine. >> >> Do you have any suggestions? Currently I have not worked out an good >> solution. >> > > TBH, I haven't given it a much thought. I would like to know if people > are happy with just one SMC channel for SCMI or do they need more ? > If they need it, we can try to solve it. Otherwise, what you have will > suffice IMO. On our platforms we have one channel/shared memory area/mailbox instance for all standard SCMI protocols, and we have a separate channel/shared memory area/mailbox driver instance for a proprietary one. They happen to have difference throughput requirements, hence the split. If I read Peng's submission correctly, it seems to me that the usage model described before is still fine. -- Florian