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Date:      Fri, 10 Feb 2017 16:22:01 -0600
From:      Karl Denninger <karl@denninger.net>
To:        Oleksandr Tymoshenko <gonzo@bluezbox.com>
Cc:        "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
Subject:   Re: Pi3 vchiq driver?
Message-ID:  <4ce65a43-8216-acbc-2a6c-c7da6e070727@denninger.net>
In-Reply-To: <20170210221953.GA54179@bluezbox.com>
References:  <f5ecf842-8151-bb67-6056-f73f4c302cd4@denninger.net> <20170210221953.GA54179@bluezbox.com>
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On 2/10/2017 16:19, Oleksandr Tymoshenko wrote:
> Karl Denninger (karl@denninger.net) wrote:
>> I assume this will provide the audio service (which is currently not
>> available) on the Pi3.
>>
>> Attempting to include it results in a handful of compilation errors. 
>> They'd be easy to fix for the instant case but generalizing them so they
>> ALSO compile on the Pi2 would likely be a good idea, and I'm
>> less-certain on the "right" way to do that.
> ... skipped ...
>> Guidance?
> VCHI driver is designed for 32-bit system. It passes pointers as opaque
> values to VideoCore and expectes them mirrored back and reused as
> pointers. This is not going to work on 64-bit system. It can be fixed
> but it's not a matter of adding more #ifdefs some additional logic
> required. There is also a matter of userland-facing API which is not
> relevant for audio driver but relevant for OpenGL and other parts of
> raspberrypi-userland port.
>
> I have some work in progress but it's far from proper state.
>

Gotcha....

The i2c driver compiles on the Pi3 but I don't know if it works yet.  I
also have yet to check the GPIO outputs (the "led" driver does *not*
work and that might portend bad things, but we'll see.)  I'll get the
breadboard out with one of my spare i2c modules and see if I can talk to it.

-- 
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/

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