linux-kernel - Re: [PATCH v3 09/15] ASoC: tegra: Add fallback for audio mclk

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Message-ID: <20191209204735.GK5483@sirena.org.uk>
Date:   Mon, 9 Dec 2019 20:47:35 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Sowjanya Komatineni <skomatineni@...dia.com>,
        thierry.reding@...il.com, jonathanh@...dia.com,
        mperttunen@...dia.com, gregkh@...uxfoundation.org,
        sboyd@...nel.org, tglx@...utronix.de, robh+dt@...nel.org,
        mark.rutland@....com, allison@...utok.net, pdeschrijver@...dia.com,
        pgaikwad@...dia.com, mturquette@...libre.com,
        horms+renesas@...ge.net.au, Jisheng.Zhang@...aptics.com,
        krzk@...nel.org, arnd@...db.de, spujar@...dia.com,
        josephl@...dia.com, vidyas@...dia.com, daniel.lezcano@...aro.org,
        mmaddireddy@...dia.com, markz@...dia.com,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        alexios.zavras@...el.com, alsa-devel@...a-project.org
Subject: Re: [PATCH v3 09/15] ASoC: tegra: Add fallback for audio mclk

On Mon, Dec 09, 2019 at 11:31:59PM +0300, Dmitry Osipenko wrote:
> 09.12.2019 19:40, Mark Brown пишет:

> > Why would this need to be a stable fix?  Presumably people with stable
> > kernels are using the old device tree anyway?

> At least Rob Herring is asking to maintain backwards compatibility
> because some ditros are using newer device-trees with stable kernels.

You're talking about forwards compatibility not backwards here.  Are
those distros actually using LTS kernels?

> I'm personally also tending to use the newer DTB with older kernel
> version whenever there is a need to check something using stable kernel.
> Perhaps losing sound is not very important, but will be nicer if that
> doesn't happen.

That really does sound like a "you broke it, you get all the pieces"
situation TBH...  I'd be a lot more comfortable if the stable kernels
were sticking to bugfix only though I do appreciate that they're not
really that any more.

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