From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Keith Packard <keithp@keithp.com>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-dev@lists.linaro.org,
"Clark\, Rob" <rob@ti.com>, Archit Taneja <archit@ti.com>
Subject: Re: Proposal for a low-level Linux display framework
Date: Thu, 15 Sep 2011 20:05:14 +0100 [thread overview]
Message-ID: <20110915200514.74bdcd90@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4E723A20.2040002@gmx.de>
> What is your problem with discontigous framebuffers? (I assume discontigous
> refers to the pages the framebuffer is composed of)
> Sounds to me like you should implement your own fb_mmap and either map it
> contigous to screen_base or implement your own fb_read/write.
> In theory you could even have each pixel at a completely different memory
> location although some userspace wouldn't be happy when it could no longer mmap
> the framebuffer.
The mmap side is trivial, the problem is that the fb layer default
implementations of blits, fills etc only work on a kernel linear frame
buffer. And (for example) there is not enough linear stolen memory on
some Intel video for a 1080p console on HDMI even though the hardware is
perfectly capable of using an HDTV as its monitor. Nor - on a 32bit box-
is there enough space to vremap it.
Alan
next prev parent reply other threads:[~2011-09-15 19:06 UTC|newest]
Thread overview: 59+ 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 [this message]
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
2011-09-15 19:28 ` Alan Cox
2011-09-15 19:45 ` Alex Deucher
2011-09-17 14:44 ` Felipe Contreras
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
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
2011-10-01 17:30 ` Enrico Weigelt
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
2011-10-01 17:34 ` Enrico Weigelt
2011-09-15 15:03 ` Kyungmin Park
2011-09-21 13:26 ` Heiko Stübner
2011-10-01 16:52 ` Enrico Weigelt
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