Re: [PATCH v4 3/5] iommu/arm-smmu: add ACTLR data and support for SM8550

[Dmitry Baryshkov]

On 16/12/2023 01:35, Konrad Dybcio wrote:
> On 15.12.2023 11:18, Bibek Kumar Patro wrote:
> > Add ACTLR data table for SM8550 along with support for
> > same including SM8550 specific implementation operations.
> >
> > Signed-off-by: Bibek Kumar Patro <quic_bibekkum@xxxxxxxxxxx>
> > ---
> [...]
>
> > +static const struct qcom_smmu_match_data sm8550_smmu_500_impl0_data = {
> > +	.impl = &qcom_smmu_500_impl,
> > +	.adreno_impl = &qcom_adreno_smmu_500_impl,
> > +	.cfg = &qcom_smmu_impl0_cfg,
> > +	.actlrcfg = sm8550_apps_actlr_cfg,
> > +	.actlrcfg_gfx = sm8550_gfx_actlr_cfg,
> There are platforms that feature more than just APPS and Adreno SMMUs,
> this implementation seems to assume there's only these two :/
>
> I suppose the only way to solve this would be to introduce new compatibles
> for each one of them.. Krzysztof, do you think that's reasonable? E.g.
> MSM8996 has at least 5 instances, 8998 has at least 4 etc.

Ugh. I don't think compatibles will make sense here. I think we have to 
resolve to the hated solution of putting identifying the instance via 
the IO address.

--
With best wishes
Dmitry