On Thu, Nov 15, 2018 at 03:50:13PM +0100, Paul Kocialkowski wrote:
> This adds nodes for the Video Engine and the associated reserved memory
> for the A64. Up to 96 MiB of memory are dedicated to the CMA pool.
>
> The pool is located at the end of the first 256 MiB of RAM so that the
> VPU can access it. It is unclear whether this is still a hard
> requirement for this platform, but it seems safer that way.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 25 +++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> index 88b3e9110833..a35a5c9ffbbe 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> @@ -185,6 +185,20 @@
> (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> };
>
> + reserved-memory {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + cma_pool: cma@4a000000 {
> + compatible = "shared-dma-pool";
> + size = <0x6000000>;
> + alloc-ranges = <0x4a000000 0x6000000>;
This introduces a DTC warning, since you're using a unit-address, but
don't have a reg register.
I've fixed it in the other DT by renaming that node to
default-pool. You can also drop the label, it's not used anywhere.
Maxime
--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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