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Mon, 12 Apr 2021 05:46:11 -0700 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 12 Apr 2021 20:46:09 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 12 Apr 2021 20:46:07 +0800 From: Irui Wang To: Alexandre Courbot , Hans Verkuil , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger CC: Tiffany Lin , Fritz Koenig , Tzung-Bi Shih , Maoguang Meng , Longfei Wang , Yunfei Dong , Irui Wang , , , , , , , Subject: [PATCH v3, 2/6] dt-bindings: media: mtk-vcodec: Add dma-ranges property Date: Mon, 12 Apr 2021 20:45:51 +0800 Message-ID: <20210412124555.26897-3-irui.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210412124555.26897-1-irui.wang@mediatek.com> References: <20210412124555.26897-1-irui.wang@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 7A245EEF486F4D984B2C3822463F9071D1DE909E28870D326F70B646EA8206E62000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210412_054616_320460_49F9A047 X-CRM114-Status: GOOD ( 11.60 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The mt8192 iommu support 0~16GB iova. We separate it to four banks: 0~4G; 4G~8G; 8G~12G; 12G~16G. The "dma-ranges" could be used to adjust the bank we locate. If we don't set this property. The default range always is 0~4G. Here we don't have actual bus/parent concept here. And the iova requirement is for our HW. Thus put the property in our node. Signed-off-by: Irui Wang --- Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt index 06db6837cefd..b7801e3c354a 100644 --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt @@ -22,6 +22,8 @@ Required properties: - iommus : should point to the respective IOMMU block with master port as argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details. +- dma-ranges : describes how the physical address space of the IOMMU maps + to memory. One of the two following nodes: - mediatek,vpu : the node of the video processor unit, if using VPU. - mediatek,scp : the node of the SCP unit, if using SCP.