From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com [209.85.208.179]) (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 E9B9020F8B for ; Wed, 12 Jul 2023 19:42:30 +0000 (UTC) Received: by mail-lj1-f179.google.com with SMTP id 38308e7fff4ca-2b71ae5fa2fso67342341fa.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=WLkbVP3rKGjglKvt5w94ZLNbAAV3MyrYJ5FKuLZ1kny96tOPBmrWLmgEP/AKSQcf4O cbqifgHgSeB5jvCXhXbqChiXcBSLpr0VMcFfEw3T3r4RprZqfq5da8hxzmXt1zlA4/bo 7aOS8uJA0q84Y8m79rf+cDpJ4g7O5+VMh6mR11OxMboXg2LliyLJa5F/PsfrDw1T8GgL lTTTzoHabBxo44W7RXGDtqcRh3FkJwaYWb916HzZdUnljDvlH4z6+vsm0aVXZmvJM/Uc xH6OWagyjk9FjPVoCC8ngl7c7TZq2suhwznrrVz59HbFGEEpmbFOjl/7/Glr6tpsf55x Mgfw== X-Gm-Message-State: ABy/qLZLA70ohSR2jL8UQnCo2Gb98GvKhlmyO6WBqJz1EVIZ3mqON8kN TBGCxm1nIPykCB77Fn5/4Ufgwg== 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 Precedence: bulk X-Mailing-List: asahi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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 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