From: Gerd Hoffmann <kraxel@redhat.com>
To: Dave Airlie <airlied@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Teddy Wang <teddy.wang@siliconmotion.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
LKML <linux-kernel@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
Arnaud Patard <arnaud.patard@rtp-net.org>
Subject: Re: [RFC PATCH 0/3] staging: remove fbdev drivers
Date: Tue, 13 Dec 2016 08:33:24 +0100 [thread overview]
Message-ID: <1481614404.27088.64.camel@redhat.com> (raw)
In-Reply-To: <CAPM=9twUSRvfmh2ENMXTwCx-ULGzmPpyHs_wMM0XGDeWHMhnXw@mail.gmail.com>
Hi,
> The acceleration that most of the 2D things provide isn't ever that
> great, and shadowing is a lot more effective if done properly.
That is probably true for anything pci-ish, because those devices are
optimized for memory writes and reads are horribly slow. So you surely
want avoid device memory reads and shadowing is a effective way to do
this.
On arm hardware the tradeoff may look quite different, the cpus are
relatively slow and I think most arm gpus don't have dedicated device
memory ...
cheers,
Gerd
next prev parent reply other threads:[~2016-12-13 8:49 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-23 8:03 [RFC PATCH 0/3] staging: remove fbdev drivers Tomi Valkeinen
2016-11-23 8:03 ` [RFC PATCH 1/3] staging: remove xgifb Tomi Valkeinen
2016-11-23 8:03 ` [RFC PATCH 2/3] staging: remove sm750fb Tomi Valkeinen
2016-11-23 8:03 ` [RFC PATCH 3/3] staging: remove fbtft Tomi Valkeinen
2016-11-23 17:26 ` Noralf Trønnes
2016-11-24 8:36 ` Tomi Valkeinen
2016-11-23 20:12 ` Drew Fustini
2016-11-23 8:19 ` [RFC PATCH 0/3] staging: remove fbdev drivers Daniel Vetter
2016-11-23 8:21 ` Tomi Valkeinen
2016-11-23 8:25 ` Geert Uytterhoeven
2016-11-23 8:45 ` Daniel Vetter
2016-11-23 8:52 ` Greg Kroah-Hartman
2016-11-23 9:12 ` Tomi Valkeinen
2016-11-23 9:49 ` Greg Kroah-Hartman
2016-11-23 10:05 ` Thomas Petazzoni
2016-12-22 20:36 ` Andy Shevchenko
2016-12-08 22:00 ` Sudip Mukherjee
2016-12-08 1:01 ` Benjamin Herrenschmidt
2016-12-08 8:01 ` Tomi Valkeinen
2016-12-08 21:23 ` Benjamin Herrenschmidt
2016-12-08 21:43 ` Benjamin Herrenschmidt
2016-12-09 8:13 ` Daniel Vetter
2016-12-13 7:36 ` Gerd Hoffmann
2016-12-08 10:10 ` Daniel Vetter
2016-12-08 12:15 ` Geert Uytterhoeven
2016-12-08 14:02 ` Daniel Vetter
2016-12-08 14:22 ` Geert Uytterhoeven
2016-12-08 14:37 ` Thomas Petazzoni
2016-12-08 14:44 ` Geert Uytterhoeven
2016-12-08 15:21 ` Daniel Vetter
2016-12-08 21:34 ` Benjamin Herrenschmidt
2016-12-08 21:57 ` Benjamin Herrenschmidt
2016-12-09 8:34 ` Daniel Vetter
2016-12-09 8:41 ` Daniel Vetter
2016-12-09 11:48 ` Benjamin Herrenschmidt
2016-12-09 13:35 ` Daniel Vetter
2016-12-09 20:27 ` Benjamin Herrenschmidt
2016-12-13 7:18 ` Michel Dänzer
2016-12-09 11:44 ` Benjamin Herrenschmidt
2016-12-09 12:33 ` Geert Uytterhoeven
2016-12-09 13:19 ` Lucas Stach
2016-12-09 13:33 ` Daniel Vetter
2016-12-09 13:57 ` David Herrmann
2016-12-09 14:04 ` Daniel Vetter
2016-12-09 20:29 ` Benjamin Herrenschmidt
2016-12-09 8:30 ` Daniel Vetter
2016-12-08 14:59 ` Jani Nikula
2016-12-08 14:22 ` Daniel Vetter
2016-12-08 21:28 ` Benjamin Herrenschmidt
2016-12-09 0:08 ` Dave Airlie
2016-12-09 8:04 ` Geert Uytterhoeven
2016-12-09 11:40 ` Benjamin Herrenschmidt
2016-12-13 7:33 ` Gerd Hoffmann [this message]
2016-12-13 15:17 ` Laurent Pinchart
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