linux-kernel - Re: [PATCH v5 5/5] PCI: qcom: Add OPP support to scale performance state of power domain

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Message-ID: <20240110073807.sqwmsyr6nmigg6zc@vireshk-i7>
Date: Wed, 10 Jan 2024 13:08:07 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Krishna Chaitanya Chundru <quic_krichai@...cinc.com>
Cc: Bjorn Helgaas <helgaas@...nel.org>, agross@...nel.org,
	andersson@...nel.org, konrad.dybcio@...aro.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	vireshk@...nel.org, nm@...com, sboyd@...nel.org, mani@...nel.org,
	lpieralisi@...nel.org, kw@...ux.com, robh@...nel.org,
	bhelgaas@...gle.com, rafael@...nel.org,
	linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, quic_vbadigan@...cinc.com,
	quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
	quic_ramkri@...cinc.com, quic_parass@...cinc.com
Subject: Re: [PATCH v5 5/5] PCI: qcom: Add OPP support to scale performance
 state of power domain

On 10-01-24, 12:42, Krishna Chaitanya Chundru wrote:
> At present we are not changing the link width after link is initialized, but
> we have plans to
> 
> add support change link width dynamically at runtime.

Hmm okay.

> So, I think it is better to have ICC BW voting in the driver itself.

I guess it is better to have more entries in the OPP table then.. 15-20 OPPs
isn't too many to be honest.

Replicating code is the last thing I would like to do.

Maybe you can show the different layouts of the OPP table if you are concerned.
We can then see if it is getting too much or not.

-- 
viresh