linux-kernel - Re: [PATCH 0/7] staging: vc04_services: Some dead code removal

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Date:   Mon, 15 Oct 2018 09:14:34 -0700
From:   Eric Anholt <eric@...olt.net>
To:     Stefan Wahren <stefan.wahren@...e.com>,
        Tuomas Tynkkynen <tuomas.tynkkynen@....fi>,
        phil@...pberrypi.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-rpi-kernel@...ts.infradead.org, devel@...verdev.osuosl.org
Subject: Re: [PATCH 0/7] staging: vc04_services: Some dead code removal

Stefan Wahren <stefan.wahren@...e.com> writes:

> Hi Tuomas,
>
>> Tuomas Tynkkynen <tuomas.tynkkynen@....fi> hat am 4. Oktober 2018 um 11:37 geschrieben:
>> 
>> 
>> Drop various pieces of dead code from here and there to get rid of
>> the remaining users of VCHI_CONNECTION_T. After that we get to drop
>> entire header files worth of unused code.
>> 
>> I've tested on a Raspberry Pi Model B (bcm2835_defconfig) that
>> snd-bcm2835 can still play analog audio just fine.
>> 
>
> thanks and i'm fine with your patch series:
>
> Acked-by: Stefan Wahren <stefan.wahren@...e.com>
>
> Unfortunately this would break compilation of the downstream vchi
> drivers like vcsm [1]. Personally i don't want to maintain another
> one, because i cannot see the gain of the resulting effort.
>
> [1] - https://github.com/raspberrypi/linux/tree/rpi-4.14.y/drivers/char/broadcom/vc_sm

I think the main concern would be if we removed things necessary for
6by9's new vcsm (the one that will let us do dma-buf sharing between
media decode and DRM).

On the other hand, git revert is a thing, so it's not like we actually
lose anything.

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