linux-kernel - [PATCH] arm64: dts: mediatek: mt8192: Add missing dma-ranges to soc node

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Message-Id: <20230601203221.3675915-1-nfraprado@collabora.com>
Date:   Thu,  1 Jun 2023 16:32:21 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, kernel@...labora.com,
        Yong Wu <yong.wu@...iatek.com>,
        Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>, Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] arm64: dts: mediatek: mt8192: Add missing dma-ranges to soc node

In the series "Adjust the dma-ranges for MTK IOMMU", the mtk-iommu
driver was adapted to separate the iova range based on the larb used,
and a dma-ranges property was added to the soc node in the devicetree of
the affected SoCs allowing the whole 16GB iova range to be used. Except
that for mt8192, there was no patch adding dma-ranges.

Add the missing dma-ranges property to the soc node like was done for
mt8195 and mt8186. This fixes the usage of the vcodec, which would
otherwise trigger iommu faults.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

---
Matthias,

this is a very simple but important fix for the vcodec functionality.
Since the vcodec node for mt8192 was just merged, can we please get this
in in this merge window as well?

Thanks,
Nícolas

 arch/arm64/boot/dts/mediatek/mt8192.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
index 7ff183c35494..a3612de8e9d1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
@@ -401,6 +401,7 @@ soc {
 		#address-cells = <2>;
 		#size-cells = <2>;
 		compatible = "simple-bus";
+		dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>;
 		ranges;

 		gic: interrupt-controller@...0000 {
-- 
2.40.1