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 X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C2B8C433ED for ; Mon, 12 Apr 2021 18:25:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2198561352 for ; Mon, 12 Apr 2021 18:25:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243534AbhDLSZv (ORCPT ); Mon, 12 Apr 2021 14:25:51 -0400 Received: from mail-oi1-f179.google.com ([209.85.167.179]:44567 "EHLO mail-oi1-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236675AbhDLSZu (ORCPT ); Mon, 12 Apr 2021 14:25:50 -0400 Received: by mail-oi1-f179.google.com with SMTP id j24so3515124oii.11; Mon, 12 Apr 2021 11:25:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Uy5HrUvhq1cZCDSi9Kwt57LFPamGKIDDP47/2Ov/Lfo=; b=gDbVmDXQ17vYzn8V6qtBaWALqpmqiR3YvKNb4Lp4F3OxBmO6wlywH15kVmR1AvlDhm XR6jRa5EkGGi9URsLzrc/GlmN0YJ8TGgQk7y/QWhUPLMOZW5EYWmcllEZpp1ExSkjBKG WMV4lztSwgcRGF9J2QFqLhN3ckv2NND6motE7kNPwrLQkncb30zRFTWP1FIOWM1VH539 EzUsaHoFIO5rte4vX2r1LTKBPWBST5MdMmj4dbTFNcBp3xL7q+EZpc4SC4eysEIotXOx rSVrWOrT7Mme1voKkQUzCDn8G4NIoK2vUbWR0tMOIryU1bjQZ5p8bMEAq1lQTSZQReTR c1TQ== X-Gm-Message-State: AOAM530pD+DQzP27wIdq5KmeVAuSSA8DZbDDDCczj2hsOK/UxsVoC/ru Oj4ncur+LrZAqkcREqmm7G48VHm93Q== X-Google-Smtp-Source: ABdhPJwoG816v9ySSk0Ka+75sfhwPbE2lsPiIQuIiB7eDJs3lzf8TPNAh93WSLSX/J9HEbTdQuBlIg== X-Received: by 2002:aca:2103:: with SMTP id 3mr378105oiz.80.1618251931383; Mon, 12 Apr 2021 11:25:31 -0700 (PDT) Received: from robh.at.kernel.org (24-155-109-49.dyn.grandenetworks.net. [24.155.109.49]) by smtp.gmail.com with ESMTPSA id q21sm736940oof.5.2021.04.12.11.25.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Apr 2021 11:25:30 -0700 (PDT) Received: (nullmailer pid 4155984 invoked by uid 1000); Mon, 12 Apr 2021 18:25:29 -0000 Date: Mon, 12 Apr 2021 13:25:29 -0500 From: Rob Herring To: Radhey Shyam Pandey Cc: linux-arm-kernel@lists.infradead.org, git@xilinx.com, vkoul@kernel.org, michal.simek@xilinx.com, robh+dt@kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, dmaengine@vger.kernel.org Subject: Re: [RFC v2 PATCH 2/7] dt-bindings: dmaengine: xilinx_dma: Add xlnx,irq-delay property Message-ID: <20210412182529.GA4155955@robh.at.kernel.org> References: <1617990965-35337-1-git-send-email-radhey.shyam.pandey@xilinx.com> <1617990965-35337-3-git-send-email-radhey.shyam.pandey@xilinx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1617990965-35337-3-git-send-email-radhey.shyam.pandey@xilinx.com> Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On Fri, 09 Apr 2021 23:26:00 +0530, Radhey Shyam Pandey wrote: > Add an optional AXI DMA property 'xlnx,irq-delay'. It specifies interrupt > timeout value and causes the DMA engine to generate an interrupt after the > delay time period has expired. Timer begins counting at the end of a packet > and resets with receipt of a new packet or a timeout event occurs. > > This property is useful when AXI DMA is connected to the streaming IP i.e > axiethernet where inter packet latency is critical while still taking the > benefit of interrupt coalescing. > > Signed-off-by: Radhey Shyam Pandey > --- > Changes for v2: > - New patch. Introduce xlnx,irq-delay property for low latency usecases > --- > Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > Acked-by: Rob Herring