Re: [PATCH 2/4] soc: qcom: icc-bwmon: add support for sc7280 LLCC BWMON

[Rajendra Nayak]

On 9/1/2022 8:57 PM, Krzysztof Kozlowski wrote:
> On 01/09/2022 15:47, Rajendra Nayak wrote:
> > Add support for sc7280 BWMON instance measuring traffic between LLCC and
> > memory with the v5 register layout.
> >
> > Signed-off-by: Rajendra Nayak <quic_rjendra@xxxxxxxxxxx>
> > ---
> >   drivers/soc/qcom/icc-bwmon.c | 15 +++++++++++++++
> >   1 file changed, 15 insertions(+)
> >
> > diff --git a/drivers/soc/qcom/icc-bwmon.c b/drivers/soc/qcom/icc-bwmon.c
> > index 47c2c3e7bb3f..44a10009b45e 100644
> > --- a/drivers/soc/qcom/icc-bwmon.c
> > +++ b/drivers/soc/qcom/icc-bwmon.c
> > @@ -656,6 +656,18 @@ static const struct icc_bwmon_data sdm845_llcc_bwmon_data = {
> >   	.regmap_cfg = &sdm845_llcc_bwmon_regmap_cfg,
> >   };
> >   
> > +static const struct icc_bwmon_data sc7280_llcc_bwmon_data = {
> > +	.sample_ms = 4,
> > +	.count_unit_kb = 64,
>
> This makes me wonder if I put correct count unit for SDM845 LLCC...

These numbers seem to vary from SoC to SoC, I looked up the sdm845.dtsi from
the CAF kernels [1] and it seems like it should be 4096 instead of 1024?

[1] https://source.codeaurora.org/quic/la/kernel/msm-4.9/tree/arch/arm64/boot/dts/qcom/sdm845.dtsi
 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>
> Best regards,
> Krzysztof