From: Felipe Contreras <felipe.contreras@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>,
Alex Deucher <alexdeucher@gmail.com>,
Keith Packard <keithp@keithp.com>,
linux-fbdev@vger.kernel.org, linaro-dev@lists.linaro.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Archit Taneja <archit@ti.com>, "Clark, Rob" <rob@ti.com>
Subject: Re: Proposal for a low-level Linux display framework
Date: Sat, 17 Sep 2011 14:44:44 +0000 [thread overview]
Message-ID: <CAMP44s1ywhCV+FaudnwjwJUvj5Cf3_oz1M++kjXxRDGQpJ6-0w@mail.gmail.com> (raw)
In-Reply-To: <20110915195804.4e6d965b@lxorguk.ukuu.org.uk>
On Thu, Sep 15, 2011 at 9:58 PM, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>> One of my biggest problems with KMS is that it has (naturally) a lot more
>> complexity than the fb API which leads to instability. Basically it's very
>
> It shouldn't do - and a sample of one (your machine) is not a
> statistically valid set. Fb is pretty much ununsable in contrast on my
> main box, but that's not a statistically valid sample either.
>
> I'm not that convinced by the complexity either. For a simple video card
> setup such as those that the fb layer can kind of cope with (ie linear
> buffer, simple mode changes, no client rendering, no vblank flipping,
> limited mode management, no serious multi-head) a DRM driver is also
> pretty tiny and simple.
That's not true, many drivers work around the lack of features in the
fb API by providing custom interfaces. For example, in omapfb it's
possible to use the overlays from user-space, configure some YUV
format, do vsink, and multipages just fine:
https://github.com/felipec/gst-omapfb/blob/master/omapfb.c
It's perfect to render video clips. Of course, it would be even better
if those custom interfaces were merged into the fb API.
--
Felipe Contreras
next prev parent reply other threads:[~2011-09-17 14:44 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-15 12:07 Proposal for a low-level Linux display framework Tomi Valkeinen
2011-09-15 14:59 ` Keith Packard
2011-09-15 15:29 ` Tomi Valkeinen
2011-09-15 15:50 ` Keith Packard
2011-09-15 17:05 ` Alan Cox
2011-09-17 21:36 ` Laurent Pinchart
2011-09-15 17:12 ` Florian Tobias Schandinat
2011-09-15 17:18 ` Alan Cox
2011-09-15 17:47 ` Florian Tobias Schandinat
2011-09-15 19:05 ` Alan Cox
2011-09-15 19:46 ` Florian Tobias Schandinat
2011-09-15 21:31 ` Alan Cox
2011-09-15 17:52 ` Alex Deucher
2011-09-15 17:56 ` Geert Uytterhoeven
2011-09-15 18:04 ` Alex Deucher
2011-09-15 18:39 ` Florian Tobias Schandinat
2011-09-15 18:58 ` Alan Cox
2011-09-15 19:18 ` Florian Tobias Schandinat
[not found] ` <4E724F93.1050203-Mmb7MZpHnFY@public.gmane.org>
2011-09-15 19:28 ` Alan Cox
2011-09-15 19:45 ` Alex Deucher
2011-09-17 14:44 ` Felipe Contreras [this message]
2011-09-17 15:16 ` Rob Clark
2011-09-17 16:11 ` Florian Tobias Schandinat
2011-09-17 16:47 ` Dave Airlie
2011-09-17 18:15 ` Florian Tobias Schandinat
2011-09-17 18:23 ` Dave Airlie
2011-09-17 19:06 ` Florian Tobias Schandinat
2011-09-17 19:25 ` Corbin Simpson
2011-09-17 21:25 ` Alex Deucher
2011-09-17 20:25 ` Alan Cox
2011-10-31 20:24 ` Jesse Barnes
2011-09-17 16:50 ` Rob Clark
2011-09-16 4:53 ` Keith Packard
2011-09-17 23:12 ` Laurent Pinchart
2011-09-18 16:14 ` Rob Clark
2011-09-18 21:55 ` Laurent Pinchart
[not found] ` <201109180112.15896.laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
2011-09-18 22:23 ` Alan Cox
2011-09-19 0:09 ` Rob Clark
2011-09-20 23:32 ` Laurent Pinchart
2011-09-15 18:12 ` Keith Packard
2011-09-15 17:21 ` Tomi Valkeinen
2011-09-15 18:32 ` Rob Clark
2011-09-16 0:55 ` Keith Packard
2011-09-16 6:38 ` Tomi Valkeinen
2011-09-16 14:17 ` Daniel Vetter
2011-09-16 16:53 ` Alan Cox
2011-09-19 6:33 ` Tomi Valkeinen
2011-09-19 6:53 ` Keith Packard
2011-09-19 7:29 ` Tomi Valkeinen
2011-09-20 8:29 ` Patrik Jakobsson
2011-09-20 15:55 ` Keith Packard
2011-09-20 21:20 ` Patrik Jakobsson
2011-09-21 6:01 ` Tomi Valkeinen
2011-09-21 18:07 ` Patrik Jakobsson
2011-09-15 15:03 ` Kyungmin Park
2011-09-21 13:26 ` Heiko Stübner
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