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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F2D3C001DE for ; Wed, 12 Jul 2023 19:42:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230252AbjGLTme (ORCPT ); Wed, 12 Jul 2023 15:42:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232401AbjGLTmb (ORCPT ); Wed, 12 Jul 2023 15:42:31 -0400 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66D5B1FE5 for ; Wed, 12 Jul 2023 12:42:30 -0700 (PDT) Received: by mail-lj1-x22b.google.com with SMTP id 38308e7fff4ca-2b71ae5fa2fso67342331fa.0 for ; Wed, 12 Jul 2023 12:42:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689190948; x=1691782948; 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=FIaD+R3zG+IeSkSUIKYN7/FjM9J0ujCHdLNlAioODXE=; b=I9NrMFNv71nbDBkkb2bhN6OqbX+eRoQiRO3AuxWxTxaXro+Jjwhoen1VDMEl9OtqVz gqRfYqZyjjVKViV9+U/Spfor6DD97i5HN1OYw7M0gDy411eTUrL/R9VsEzY/e++cfTOo l4DbIe8NE4WG/FoJTr3c4UJWQZiEU6biYmCRIDpddzSNRdbztPI9za51JuCLhsMk1uVa ovyxS6Baj9rezP03HVZ+lGtk3v/sVLKmwFz8Gi0lgGX+8m1UhuwwYE2+XhmVD9xhKjUX H6qepFNGgT1PeZYvbnJrcRA11X6F9oU9OTlNWa6NpEAvDYCg4cjuuWzlMw0NJYaeD0Yb Na8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689190948; x=1691782948; 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=FIaD+R3zG+IeSkSUIKYN7/FjM9J0ujCHdLNlAioODXE=; b=JTTEqEHa8JZdSXf2voN6WGOjMzvYTLUasMwhZsTfGvU8eI3gHKuewVW3N8JbnGhuRV A9dnJgMVUU2Ko/IjC+VoQ3EC3eVABnbcnORWwesBVGg/5yAL0IWSBlnHG72t0enzE9XV QnRR59fsr/EFJX3otwGeKLEDKV0DUmD+/cbGs765zr5cTwy+yTjASL03cq8Fv9cCmLPB ql3iaYsCjx9YVbQJloSwU0M/+JUjmZmeM1o0E/VrunthrTY6YRpFjQjjeBmjRr5kaoNd /jFJSz7q2rVPIaE/okvphFVgweuUBg0XrksfelJ9jJBEmYQF5VCoJLSDjP7wwlNPnZK+ ni5Q== X-Gm-Message-State: ABy/qLZjgf2rOIcUK6Q0h/ZAhUAo6z+eNY8mXZbZiRENxCwX++rlQA0M OX+6bh64A/jJ9t3OzKM88b9nJw== X-Google-Smtp-Source: APBJJlGoL/j2CRXfaB7Onsdnsesrdy0+qIqa9SdRzh/jrIZDLn63/iDHTEz5Bw876Y6VbC/ijnBzrg== X-Received: by 2002:a2e:9909:0:b0:2b6:eefc:3e4f with SMTP id v9-20020a2e9909000000b002b6eefc3e4fmr17335677lji.21.1689190948673; Wed, 12 Jul 2023 12:42:28 -0700 (PDT) Received: from [192.168.1.20] ([178.197.223.104]) by smtp.gmail.com with ESMTPSA id cd26-20020a170906b35a00b009929c39d5c4sm2954697ejb.36.2023.07.12.12.42.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 12 Jul 2023 12:42:28 -0700 (PDT) Message-ID: Date: Wed, 12 Jul 2023 21:42:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH 0/2] Apple SIO driver Content-Language: en-US To: =?UTF-8?Q?Martin_Povi=c5=a1er?= , Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: asahi@lists.linux.dev, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20230712133806.4450-1-povik+lin@cutebit.org> From: Krzysztof Kozlowski In-Reply-To: <20230712133806.4450-1-povik+lin@cutebit.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/07/2023 15:38, Martin PoviĊĦer wrote: > Hi all, > > see attached a driver for the SIO coprocessor found on recent Apple > SoCs. This coprocessor provides general DMA services, it can feed > many peripherals but so far it seems it will only be useful for > audio output over HDMI/DisplayPort. So the driver here only supports > the DMA_CYCLIC mode of transactions with the focus being on audio. > There's a downstream prototype ALSA driver the DMA driver is being > tested against. > > Some of the boilerplate code in implementing the dmaengine interface > was lifted from apple-admac.c. Among other things these two drivers > have in common that they implement the DMA_CYCLIC regime on top of > hardware/coprocessor layer supporting linear transactions only. > > The binding schema saw two RFC rounds before and has a reviewed-by > from Rob. > https://lore.kernel.org/asahi/167693643966.613996.10372170526471864080.robh@kernel.org Thank you for explanation. Then this is v3, not v1. No need for resending, but if it happens, consider naming it v4. :) Best regards, Krzysztof