Re: [PATCH v3 3/4] arm64: dts: qcom: sdm630: describe adsp_mem region properly

[Alexey Minnekhanov]

On 27.04.2026 18:20, Nickolay Goppen wrote:
> 27.04.2026 14:49, Konrad Dybcio пишет:
> > On 4/22/26 5:39 PM, Nickolay Goppen wrote:
> > > Downstream [1] this region is marked as shared, reusable and dynamic so
> > > describe it that way.
> > >
> > > diff --git a/arch/arm64/boot/dts/qcom/sdm630.dtsi b/arch/arm64/boot/ 
> > > dts/qcom/sdm630.dtsi
> > > index 4b47efdb57b2..36b419dea153 100644
> > > --- a/arch/arm64/boot/dts/qcom/sdm630.dtsi
> > > +++ b/arch/arm64/boot/dts/qcom/sdm630.dtsi
> > > @@ -494,9 +494,12 @@ venus_region: venus@9f800000 {
> > >               no-map;
> > >           };
> > > -        adsp_mem: adsp-region@f6000000 {
> > > -            reg = <0x0 0xf6000000 0x0 0x800000>;
> > > -            no-map;
> > > +        adsp_mem: adsp-region {
> > > +            compatible = "shared-dma-pool";
> > > +            alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
> > Please make this = <0x0 0x80000000 0x0 0x80000000>; instead, since the 
> > RAM
> > starts at 0x80000000
>
> +Alexey Min found out that on 3 GiB xiaomi-lavender RAM starts at 
> 0x40000000
>
> 40000000-855fffff : System RAM
>    40080000-41bfffff : Kernel code
>    42600000-42fd0fff : Kernel data
> 88f00000-8abfffff : System RAM
> 95000000-feabffff : System RAM

Hi, yes, most other devices seem to in fact start at 80000000, even 6Gb
ones, but not sdm660-xiaomi-lavender. Here is some old UART log from
stock bootloader which also clearly shows RAM Partitions discovered
by it [1].

[1] https://paste.sr.ht/~minlexx/145c5077bf1ce83fe3ad6d25d923bdb9f78b548b

--
Regards,
Alexey Minnekhanov