From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: greg@kroah.com, linux-kernel@vger.kernel.org,
Linux Fbdev development list <linux-fbdev@vger.kernel.org>
Subject: Re: [PATCH] gma500: gtt based hardware scrolling console
Date: Thu, 22 Sep 2011 21:21:46 +0100 [thread overview]
Message-ID: <20110922212146.609065b1@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <CAMuHMdWBz9+TCBUbaOY3HRv=khiDHkRCKdx5e53HCen54RUBVw@mail.gmail.com>
> > + info->fix.ywrapstep = gtt_roll;
>
> Do you really want to set this? I didn't see any other wrapping
> support in your patch.
> However, I guess you can implement wrapping support using the same
> mapping trick?
It is actually wrapping - it writes the low pages back below the high
ones so it works the GTT as a circular buffer - or am I misunderstanding
this.
One thing I wasn't sure of on the fb side. If I've got a display width
that is annoying and can't fit on a 4Kbyte stride am I right in thinking
I can set this to say 8 and use a 512 byte stride and still get
acceleration for the usual font choice ?
Alan
next prev parent reply other threads:[~2011-09-22 20:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-22 18:43 Alan Cox
2011-09-22 19:40 ` Geert Uytterhoeven
2011-09-22 20:21 ` Alan Cox [this message]
2011-09-23 5:17 ` Geert Uytterhoeven
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