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Fri, 21 May 2021 01:06:23 -0700 (PDT) MIME-Version: 1.0 References: <20210521070139.20644-1-irui.wang@mediatek.com> <20210521070139.20644-4-irui.wang@mediatek.com> In-Reply-To: <20210521070139.20644-4-irui.wang@mediatek.com> From: Tzung-Bi Shih Date: Fri, 21 May 2021 16:06:12 +0800 Message-ID: Subject: Re: [PATCH v4,3/6] media: mtk-vcodec: Support 4GB~8GB range iova space for venc To: Irui Wang Cc: Alexandre Courbot , Hans Verkuil , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa , Hsin-Yi Wang , Maoguang Meng , Longfei Wang , Yong Wu , Yunfei Dong , Fritz Koenig , Tzung-Bi Shih , linux-media@vger.kernel.org, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Kernel Mailing List , "moderated list:ARM/Mediatek SoC support" , srv_heupstream@mediatek.com, "moderated list:ARM/Mediatek SoC support" , Project_Global_Chrome_Upstream_Group@mediatek.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210521_010624_775588_4899F36E X-CRM114-Status: GOOD ( 10.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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 Fri, May 21, 2021 at 3:02 PM Irui Wang wrote: > + if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL)) > + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34)); > + >From your previous dt-bindings patch[1], it has 4 banks. > 0~4G; 4G~8G; 8G~12G; 12G~16G. But, the code treats it as a boolean. I.e. 0~4GB if non-existent; otherwise, 4GB~8GB. [1]: https://patchwork.linuxtv.org/project/linux-media/patch/20210521070139.20644-3-irui.wang@mediatek.com/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel