2023-01-13 06:09:48

by Yong Wu (吴勇)

[permalink] [raw]
Subject: [PATCH 08/10] arm64: dts: mt8195: Add dma-ranges for the parent "soc" node

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 <[email protected]>
---
arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 +
1 file changed, 1 insertion(+)

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";
--
2.18.0


Subject: Re: [PATCH 08/10] arm64: dts: mt8195: Add dma-ranges for the parent "soc" node

Il 13/01/23 07:01, Yong Wu ha scritto:
> 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 <[email protected]>

Reviewed-by: AngeloGioacchino Del Regno <[email protected]>