Re: [PATCH] Add device enumeration interface (v3)

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On Thu, May 28, 2015 at 8:44 AM, Emil Velikov <emil.l.velikov@xxxxxxxxx> wrote:
> On 25 May 2015 at 12:18, Zhou, Jammy <Jammy.Zhou@xxxxxxx> wrote:
>> Hi Emil,
>>
>> Do you have chance to have a look at this new version? Thanks!
>>
> Hi guys sorry for the delay.
>
> Looking at my original email response it seems that I wasn't clear
> enough about my concerns. They can be looked at as independent and/or
> grouped up, depending on your liking:
>
> - Adding a new interface using which it's not obvious how one can
> simplify/ease existing related implementations.
> As mentioned before, the claiming duplication that already exists is
> more complete than this API.
>
> - No open-source software uses the interface.
> Do you have any patches in progress that convert project foo to using
> the API? Otherwise is seems like an open-source project catering after
> a closed source project needs.

It's actually in preparation for upcoming open source releases.

>
> - Adding new dependencies.
> Previously libpciaccess, now libudev. The former is used only by a
> single function in libdrm_intel, while the latter was optional. v3
> makes the use of libudev a hard requirement.
> Using the library in mesa has caused problems with Steam (and possibly
> other binary programs/games) which ships their own version of various
> libraries.

Can you think of a better method for device enumeration?  Rolling our
own seem like a waste of effort.


>
> Now that the patch is merged, the last issue has emerged (in a
> particular form). Is there any plan to convert an open-source project
> to use this API ?

The first users actually will be open source they are just not ready
for public release just yet.  We are trying to reduce our internal
patch queue and get stuff upstream early and thought others might be
interested, but if there are concerns we can revert it for now and
re-submit it when we are ready to release the relevant code.

Alex
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