interconnect: qcom: icc-rpm: Add AB/IB calculations coefficients

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Presumably due to the hardware being so complex, some nodes (or busses)
have different (usually higher) requirements for bandwidth than what
the usual calculations would suggest.

Looking at the available downstream files, it seems like AB values are
adjusted per-bus and IB values are adjusted per-node.
With that in mind, introduce percentage-based coefficient struct members
and use them in the calculations.

One thing to note is that the IB coefficient is inverse (100/ib_percent)
which feels a bit backwards, but it's necessary for precision..

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230726-topic-icc_coeff-v4-1-c04b60caa467@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>

...

This commit is contained in:

Konrad Dybcio 2023-08-25 17:38:23 +02:00 • committed by Georgi Djakov

parent 0bb80ecc33

commit dd014803f2

2 changed files with 21 additions and 3 deletions

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18

drivers/interconnect/qcom/icc-rpm.c

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6

drivers/interconnect/qcom/icc-rpm.h

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