From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DF332486BB4; Fri, 2 Oct 2026 12:01:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790942463; cv=none; b=oTYUJe9uxwjeh68WXtHEq05q6cS3a+totxLjtGG9igPNNCzqHEZs0hstFnTwwiygx/TBKT/8GtBHv0GfemmDp6z4kYwBbzCSQ4aQAo+hco0vBkN9kXm2uOVq4u2UQKZeAnNAWy5pnJvU1AiaYFgh7nR6LV0fBSF56D2JHQQwPrs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790942463; c=relaxed/simple; bh=wjGPhqLdUPxxQ8hIdNzWUdbwHRjhhPUYdhvazM+TiDo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=a9DT3XvkNqyRO1dnRM6saPfTli0yi5mtMRTwKk1K4pldL+oGG+4T6rqeeSeLfNryaeLNwSKY1Oip+CKJD6+WPDnACco2+92PKDzg1Fksc524Ylziq7Hwa3dICfu6vz3+8R2nwRwHgOx+k79Oi48lKX2rs9dqgO9mOclSbGT4Lp8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=BLIZfEcu; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="BLIZfEcu" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 455CE4E41103; Fri, 2 Oct 2026 12:00:59 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 0B0B7603DC; Fri, 2 Oct 2026 12:00:59 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 2D33A103281A3; Fri, 2 Oct 2026 14:00:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1790942458; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=wjGPhqLdUPxxQ8hIdNzWUdbwHRjhhPUYdhvazM+TiDo=; b=BLIZfEcutQU/GVJn9Dtb03DTsEgXgs2oB0BKbhdk326jknpP0um6jVD996YrNgILNReWsP PjEVC7wW1bJpUvy1AsZ7a2pNkexynJuzHv9wSk5XDbVOuDhn/vaf56VPFAhNtMfTjSqoqE QWPKm3332KzK24j4g5V3RdOFl2ps3qYLfli8k4OkjiRGFtSyCv+BSsWoyLOjNBMQ0QdVOT +Z8cU88cHPdFczaSsZjPou63XXcVr41wtJZqiRqbNhCEkVaQ74yl8sJTDPZPBa/8oZCXbN RQuyKBzK7gyinIh1jPjEgr24WZrazlL4at5t3Pg8/tZVLIGNiMoxo6maxNrQlA== From: =?UTF-8?B?QmVub8OudA==?= Monin To: Frank Li , Vinod Koul Cc: Thomas Petazzoni , Frank Li , imx@lists.linux.dev, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v11 0/2] dmaengine: fsl-edma: Scatter/gather improvements Date: Fri, 02 Oct 2026 14:00:56 +0200 Message-ID: In-Reply-To: <20260916-fsl-edma-dyn-sg-v11-0-02792de71b92@bootlin.com> References: <20260916-fsl-edma-dyn-sg-v11-0-02792de71b92@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-Last-TLS-Session-Version: TLSv1.3 Hi Frank, Vinod, > This series adds support for scatter/gather DMA transfers via dma_vec > and dynamic descriptor chaining to the Freescale eDMA controller driver. >=20 > The first patch implements the .device_prep_peripheral_dma_vec() callback, > enabling the DMA engine to accept an array of dma_vec structures. This > callback supports both regular and cyclic transfer modes. >=20 > The second patch introduces dynamic scatter/gather chaining, which allows > multiple DMA descriptors to be linked together without stopping the chann= el. > This optimization eliminates idle periods when back-to-back transfers are > submitted, improving throughput and reducing latency. The implementation > carefully preserves cyclic transfer semantics and respects hardware > constraints on platforms with split register layouts. >=20 > I tested it on the i.MX93. The dynamic scatter/gather chaining should > work with other eDMA controller with split register layout. >=20 > Signed-off-by: Beno=C3=AEt Monin Gentle ping on this series. Is there anything else you would like me to address? Best regards, =2D-=20 Beno=C3=AEt Monin, Bootlin Embedded Linux and Kernel engineering https://bootlin.com