LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Jaya Kumar" <jayakumar.lkml@gmail.com>
To: "James Simmons" <jsimmons@infradead.org>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
	"Paul Mundt" <lethal@linux-sh.org>,
	"Peter Zijlstra" <a.p.zijlstra@chello.nl>,
	"Linux Frame Buffer Device Development" 
	<linux-fbdev-devel@lists.sourceforge.net>,
	"Linux Kernel Development" <linux-kernel@vger.kernel.org>,
	linux-mm@kvack.org
Subject: Re: [PATCH 2.6.20 1/1] fbdev,mm: hecuba/E-Ink fbdev driver
Date: Wed, 21 Feb 2007 18:22:58 -0500	[thread overview]
Message-ID: <45a44e480702211522q6225d4fbx3f7d99fcef5fe93c@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0702212151190.20620@pentafluge.infradead.org>

On 2/21/07, James Simmons <jsimmons@infradead.org> wrote:
>
> Could you make it work without the framebuffer. There are embedded LCD
> displays that have internal memory that need data flushed to them.
>

I'm not sure I understand. What the current implementation does is to
use host based framebuffer memory. Apps mmap that memory and draw to
that. Then after the delay, that framebuffer is written to the
device's memory. That's the scenario for hecubafb where the Apollo
controller maintains it's own internal framebuffer.

When you say without the framebuffer, if you meant without the host
memory, then this method doesn't work. If you mean without the
device's internal memory, then yes, I think we can do that, because it
would be up to the driver to use the touched pagelist to then perform
IO as suitable for its device.

Thanks,
jaya

  reply	other threads:[~2007-02-21 23:23 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-17 10:42 Jaya Kumar
2007-02-17 12:34 ` Peter Zijlstra
2007-02-17 13:25   ` Jaya Kumar
2007-02-17 13:59     ` Paul Mundt
2007-02-18 11:31       ` Jaya Kumar
2007-02-18 23:57         ` Paul Mundt
2007-02-20  4:13           ` Jaya Kumar
2007-02-20  4:38             ` Paul Mundt
2007-02-20  6:11               ` Jaya Kumar
2007-02-21 16:46                 ` Jaya Kumar
2007-02-20  8:07             ` Geert Uytterhoeven
2007-02-21 16:55               ` Jaya Kumar
2007-02-21 21:52                 ` James Simmons
2007-02-21 23:22                   ` Jaya Kumar [this message]
2007-02-28 16:50                     ` [Linux-fbdev-devel] [PATCH 2.6.20 1/1] fbdev, mm: " James Simmons
2007-02-21 23:43                 ` Antonino A. Daplas
2007-02-21 23:47                   ` Jaya Kumar
2007-02-21 23:43             ` Antonino A. Daplas

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=45a44e480702211522q6225d4fbx3f7d99fcef5fe93c@mail.gmail.com \
    --to=jayakumar.lkml@gmail.com \
    --cc=a.p.zijlstra@chello.nl \
    --cc=geert@linux-m68k.org \
    --cc=jsimmons@infradead.org \
    --cc=lethal@linux-sh.org \
    --cc=linux-fbdev-devel@lists.sourceforge.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --subject='Re: [PATCH 2.6.20 1/1] fbdev,mm: hecuba/E-Ink fbdev driver' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).