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Fri, 15 Oct 2021 07:31:01 +0000 Date: Fri, 15 Oct 2021 10:30:42 +0300 From: Dan Carpenter To: Mwesigwa Guma Cc: linux-kernel@vger.kernel.org, Nicolas Saenz Julienne , Greg Kroah-Hartman , Stefan Wahren , Ojaswin Mujoo , Amarjargal Gundjalam , Phil Elwell , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-staging@lists.linux.dev, fedora-rpi@googlegroups.com, Joel Savitz , Chukpozohn Toe , Clark Williams Subject: Re: [PATCH] staging: vchiq_arm: Add 36-bit address support Message-ID: <20211015073042.GP8429@kadam> References: <20211014223230.451659-1-mguma@redhat.com> Content-Disposition: inline In-Reply-To: <20211014223230.451659-1-mguma@redhat.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-ClientProxiedBy: JN2P275CA0014.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:3::26) To MWHPR1001MB2365.namprd10.prod.outlook.com (2603:10b6:301:2d::28) MIME-Version: 1.0 Received: from kadam (62.8.83.22) by JN2P275CA0014.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:3::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4608.17 via Frontend Transport; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Oct 14, 2021 at 06:32:30PM -0400, Mwesigwa Guma wrote: > Cc: Nicolas Saenz Julienne > Cc: Greg Kroah-Hartman > Cc: Stefan Wahren > Cc: Ojaswin Mujoo > Cc: Dan Carpenter > Cc: Amarjargal Gundjalam > Cc: Phil Elwell > Cc: bcm-kernel-feedback-list@broadcom.com > Cc: linux-rpi-kernel@lists.infradead.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-staging@lists.linux.dev > Cc: fedora-rpi@googlegroups.com > Cc: Joel Savitz > Cc: Chukpozohn Toe > Cc: Clark Williams > Did you intend to put this CC list here? It goes at the end next to the Signed-off-by line if so. I don't feel like it's required except maybe Phil to show he was Cc'd. > This is a forward port of Phil Elwell's commit from the Raspberry Pi > Linux fork described as follows [1]: Please use the From: header to give authorship credit. From: Phil Elwell Make that the first line of the email. > > Conditional on a new compatible string, change the pagelist encoding > such that the top 24 bits are the pfn, leaving 8 bits for run length > (-1), giving a 36-bit address range. > > Manage the split between addresses for the VPU and addresses for the > 40-bit DMA controller with a dedicated DMA device pointer that on non- > BCM2711 platforms is the same as the main VCHIQ device. This allows > the VCHIQ node to stay in the usual place in the DT. > > This commit enables VCHIQ device access on a Raspberry Pi 4B running the > mainline Linux kernel. > > Tested on Fedora Linux running on a Raspberry Pi 4B. > > [1]: https://github.com/raspberrypi/linux/commit/97268fd23eb8d08dc74eac5e3fd697303de26610 > > Signed-off-by: Mwesigwa Guma regards, dan carpenter _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel