[PATCH] arm64: dts: mediatek: mt8186-corsola: Update ADSP reserved memory region

[Fei Shao]

On Fri, Jul 19, 2024 at 5:22 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno at collabora.com> wrote:
>
> Il 19/07/24 06:58, Fei Shao ha scritto:
> > Corsola firmware reserves the memory region of [0x60000000, 0x61100000)
>
> Sorry but if the region is supposed to be 0x1100000 long....
>
> > exclusively for ADSP usage.
> > But in fact, a 6 MB "hole" of [0x60A00000, 0x61000000) didn't get
> > assigned to the ADSP node in the Corsola device tree, meaning no audio
> > tasks can access and utilize that memory section.
> >
> > Update the reserved ADSP memory region to fill the gap.
> >
> > Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
> > Signed-off-by: Fei Shao <fshao at chromium.org>
> > ---
> >
> >   arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
> > index afdab5724eaa..0c4a26117428 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
> > @@ -169,7 +169,7 @@ adsp_dma_mem: memory at 61000000 {
> >
> >               adsp_mem: memory at 60000000 {
> >                       compatible = "shared-dma-pool";
> > -                     reg = <0 0x60000000 0 0xA00000>;
> > +                     reg = <0 0x60000000 0 0x1000000>;
>
> ...why are you making it 0x1000000 long?

Because 0x61000000-0x61100000 belongs to another existing region,
`adsp_dma_mem`.
It's slightly confusing because the diff doesn't show that directly...
here's its snippet for ref:

adsp_dma_mem: memory at 61000000 {
        compatible = "shared-dma-pool";
        reg = <0 0x61000000 0 0x100000>;
        no-map;
};

Regards,
Fei
>
> Cheers,
> Angelo
>
> >                       no-map;
> >               };
> >
>
>