linux-kernel - Re: 3.19 on Nokia n900: audio quality awful

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Message-ID: <20150106220230.GG32308@saruman>
Date:	Tue, 6 Jan 2015 16:02:30 -0600
From:	Felipe Balbi <balbi@...com>
To:	Pavel Machek <pavel@....cz>
CC:	Felipe Balbi <balbi@...com>, <pali.rohar@...il.com>,
	<sre@...ian.org>, <sre@...g0.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <tony@...mide.com>,
	<khilman@...nel.org>, <aaro.koskinen@....fi>,
	<ivo.g.dimitrov.75@...il.com>
Subject: Re: 3.19 on Nokia n900: audio quality awful

Hi,

On Tue, Jan 06, 2015 at 10:57:44PM +0100, Pavel Machek wrote:
> > > > > > > In 3.18, sound is nice and clear.
> > > > > > > 
> > > > > > > In 3.19, sound is unusable. It produces nasty tone when it should be
> > > > > > > quiet, and there's at least as much noise as is sound.
> > > > > > > 
> > > > > > > Unfortunately, list of mixers also changed (and there's cca 120
> > > > > > > settings), but a) it does not work with the old list and b) nothing I
> > > > > > > could figure out did make the sound usable. Some setting resulted in
> > > > > > > even more noise.
> > > > > > > 
> > > > > > > Any idea what could have caused it?
> > > > > > 
> > > > > > $ git bisect start
> > > > > > $ git bisect good v3.18
> > > > > > $ git bisect bad
> > > > > > 
> > > > > > that'll help find what caused it.
> > > > > 
> > > > > Telling someone to do hard and time consuming job that probably will
> > > > > not succeed, instead of actually providing help. Very very funny.
> > > > 
> > > > you're getting code for free, you're getting help for free. Not many
> > > > people have N900s lying around. Running a bisection is just
> > > > politeness.
> > > 
> > > Now you are speaking for yourself or for TI?
> > 
> > why bring my employer into the discussion ?
> 
> Because you are speaking of getting help for free, and I don't

are you not getting help for free ?

> remember getting any useful help from you; so I'd like to know who do

how come ? I gave you a very helpful list of commands which will direct
you at finding the root of the issue you found.

> you speak for.

for myself.

> > > Thanks for your very valuable help. I know how to do a bisection,
> > > thank you.
> > 
> > then please do it.
> 
> No, sorry, I don't think that would be reasonable use of my time at
> this point. First steps are "confirm it happens on other N900 boards,
> too", ruling out config issues at my part, and "try to get
> verification from other development boards if they have same
> problems", because most other boards are easier to work with.

you don't want to do due diligence with a bug *you* found, then there's
no way people can help you out. Sorry.

Good luck

-- 
balbi

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