[OT: newbie questions] Re: EXA patches

[Joel Feiner]

On Tue, Aug 4, 2009 at 10:02 AM, Joel Feiner <jafeiner at gmail.com> wrote:

>
>
> On Tue, Aug 4, 2009 at 9:54 AM, Dave Airlie <airlied at redhat.com> wrote:
>
>> On Tue, 2009-08-04 at 09:49 +0800, Joel Feiner wrote:
>> > 2009/8/4 Michel Dänzer <michel at daenzer.net>
>> >         <snip>
>> >
>> >         I wonder if maybe the slowdown I'm seeing is because the
>> >         radeon driver
>> >         is temporarily lacking UploadToScreen and DownloadFromScreen
>> >         hooks with
>> >         KMS, though I'm not sure what those would be used for with
>> >         text
>> >         rendering.
>> >
>> > Off-topic, but if I may enquire out of intellectual curiosity: why
>> > doesn't the KMS version of Radeon have UTS and DFS acceleration?
>>
>> The code is in the branch, but its really ugly, I was hoping to actual
>> do it cleaner which might involve a new kernel interface to ask for the
>> current placement of a buffer object so we can decide whether to just
>> memcpy or we need to blit for DFS. I'm not sure I saw a good reason for
>> UTS, doing Host data blits isn't really useful with BOs at least with
>> the current code.
>>
>> Dave.
>>
>> Which branch?  And does it work?  I'm wondering if it might be worth
> trying if only to see if it solves my KMS slowness bug (
> https://bugs.freedesktop.org/show_bug.cgi?id=23085) -- that's the selfish
> reason for my question ;).
>
> And I'm sorry for my lack of knowledge on the subject, but why would UTS be
> unnecessary?  Is all 2d rendering done in such a way that it can be done in
> video memory?  Or perhaps I am misunderstanding what UTS and DFS actually
> do.
>
> I just saw the updated post on the bug report, so I now know which branch.
I will check it out.  Sorry for the email spam.
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