Re: [PATCH v3 0/5] Introduce "non-pixel" sub node within iris video node

Krzysztof Kozlowski
2025-10-09T09:11:24Z

On 09/10/2025 17:38, Bryan O'Donoghue wrote:
> On 09/10/2025 02:04, Krzysztof Kozlowski wrote:
>>> The iommu description for this platform basically lacks the data that
>>> _should_ be there -> FUNCTION_ID.
>> No. The index tells that already.
>
> Hmm.
>>> The rule is that the DT should really describe the hardware right ?
>> It already does. Same as I wrote on IRC, DT already has all the
>> information. Entry 0 has function ID-foo. Entry 1 has function ID-bar.
>> Entry 2 has function ID-bar or whatever.
>
> That's the part I don't believe is true its a 1:Many relationship
> between FUNCTION_ID:SIDs
>
> Let me check the docs...
>
> Here's the example I gave on IRC for lore
>
> SID 0x1940 maps to AC_VM_HLOS (Linux)
> SID 0x1941 maps to AC_VM_CP_BITSTREAM - protected bitstream
> SID 0x1945 maps to AC_WM_CP_BITSTREAM
>

I responded to this on IRC... Nothing proves here that 1:many cannot be
done.

Best regards,
Krzysztof