| Message ID | 20230113060133.9394-9-yong.wu@mediatek.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Adjust the dma-ranges for MTK IOMMU | expand |
diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi index 5d31536f4c48..175eb7a25307 100644 --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi @@ -299,6 +299,7 @@ #size-cells = <2>; compatible = "simple-bus"; ranges; + dma-ranges = <0x0 0x0 0x0 0x0 0x4 0x0>; gic: interrupt-controller@c000000 { compatible = "arm,gic-v3";
After commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus controllers"), the dma-ranges property is not allowed for the leaf node. But our iommu/dma-ranges is 16GB, we still expect separate the 16GB dma-range like: a) display is in 0 - 4GB; b) vcodec is in 4GB - 8GB; c) camera is in 8GB - 12GB. We can not expect all the masters add a parent node for them, especial for the existed drivers/nodes. Thus, we add whole the 16GB dma-ranges in the parent "soc" node. Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 + 1 file changed, 1 insertion(+)