From: Alexandre Courbot <gnurou@gmail.com>
To: linux-fbdev@vger.kernel.org
Subject: Re: [BUG] simplefb not showing any output
Date: Mon, 09 Sep 2013 02:40:48 +0000 [thread overview]
Message-ID: <CAAVeFuLij7h2FwbdaHVnc=3kv4SOy6ZRxunLDJsN+2_9zCCu2g@mail.gmail.com> (raw)
In-Reply-To: <CAG-2HqXhLcRX-oi4JchD=m7tZpDYyePKhWvkFU1ZZPEuqJ2JqQ@mail.gmail.com>
On Mon, Sep 9, 2013 at 11:36 AM, Alexandre Courbot <gnurou@gmail.com> wrote:
> On Sat, Sep 7, 2013 at 9:25 PM, David Herrmann <dh.herrmann@gmail.com> wrote:
>> From dbfb8e12166d494cd60823cbe84134d5d1a73ec8 Mon Sep 17 00:00:00 2001
>> From: David Herrmann <dh.herrmann@gmail.com>
>> Date: Sat, 7 Sep 2013 14:22:01 +0200
>> Subject: [PATCH] devm/simplefb: introduce and use devm_ioremap_wc()
>>
>> We want to use devm_ioremap_nocache() or even devm_ioremap_wc() to speed
>> up fbdev writes _a lot_. As devm_ioremap_wc() doesn't exist, yet,
>> introduce it along the way. Note that ioremap_wc() is aliases to
>> ioremap_nocache() in asm-generic/{io,iomem}.h so we can safely expect all
>> architectures to either provide it or use the same alias.
>>
>> Reported-by: Tom Gundersen <teg@jklm.no>
>> Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
>> Cc: Stephen Warren <swarren@wwwdotorg.org>
>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>
> Tried this on SHIELD, and it dramatically increases performance.
>
> Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Maybe the patch should be split into two though, one that adds
devm_ioremap_wc() and another that takes advantage of it for simplefb.
Alex.
next prev parent reply other threads:[~2013-09-09 2:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 16:14 [BUG] simplefb not showing any output Tom Gundersen
2013-09-06 16:57 ` David Herrmann
2013-09-06 17:12 ` Tom Gundersen
2013-09-06 17:19 ` David Herrmann
2013-09-06 17:46 ` Tom Gundersen
2013-09-07 11:47 ` Tom Gundersen
2013-09-07 12:25 ` David Herrmann
2013-09-07 13:02 ` Tom Gundersen
2013-09-09 2:36 ` Alexandre Courbot
2013-09-09 2:40 ` Alexandre Courbot [this message]
2013-09-09 9:46 ` David Herrmann
2013-09-09 15:47 ` Stephen Warren
2013-09-10 2:34 ` Stephen Warren
2013-10-02 15:01 ` David Herrmann
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