linux-kernel - RE: [PATCH] interconnect: Skip call into provider if initial bw is zero

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Message-ID: <DU0PR04MB9417A7E511E4C8B512A0CB9E88DC9@DU0PR04MB9417.eurprd04.prod.outlook.com>
Date:   Sun, 12 Feb 2023 10:56:31 +0000
From:   Peng Fan <peng.fan@....com>
To:     Abel Vesa <abel.vesa@...aro.org>,
        "djakov@...nel.org" <djakov@...nel.org>
CC:     Mike Tipton <quic_mdtipton@...cinc.com>,
        Vivek Aknurwar <quic_viveka@...cinc.com>,
        "djakov@...nel.org" <djakov@...nel.org>,
        "quic_okukatla@...cinc.com" <quic_okukatla@...cinc.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "abel >> Philipp Zabel" <p.zabel@...gutronix.de>,
        "abelvesa@...nel.org" <abelvesa@...nel.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: RE: [PATCH] interconnect: Skip call into provider if initial bw is
 zero


> Subject: Re: [PATCH] interconnect: Skip call into provider if initial bw is zero
> 
> On 23-01-23 22:58:49, Bryan O'Donoghue wrote:
> > On 23/01/2023 20:37, Mike Tipton wrote:
> > >
> > > This isn't actually changing it for all providers. Only for those
> > > that define the get_bw() callback. Right now that's only
> > > qcom/msm8974 and imx/imx. If get_bw() isn't defined, then
> > > icc_node_add() defaults to INT_MAX. So, the logical behavior in that
> > > case is unchanged. Which means this isn't even changing the behavior
> for rpmh yet, either.
> >
> > Yes that adds up.
> >
> > Looking at the commit for get_bw() for the 8974, I think this change
> > would be OK with the intent of this commit
> >
> > commit 9caf2d956cfa254c6d89c5f4d7b3f8235d75b28f
> > Author: Georgi Djakov <georgi.djakov@...aro.org>
> > Date:   Mon Nov 9 14:45:12 2020 +0200
> >
> > @Abel what effect will skipping pre->aggregation() have on i.MX ?
> 
> I don't think there is any impact on i.MX platforms.
> 
> Peng, any input?

Thanks for CC me.

No impact on i.MX.

Thanks,
Peng.
> 
> >
> > ---
> > bod