[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-fbdev-devel
Subject: Re: [Linux-fbdev-devel] [PATCH 06/16] viafb: complete support for
From: Jonathan Corbet <corbet () lwn ! net>
Date: 2010-04-09 20:18:34
Message-ID: 20100409141834.4e45f18d () bike ! lwn ! net
[Download RAW message or body]
On Fri, 09 Apr 2010 06:21:18 +0200
Florian Tobias Schandinat <FlorianSchandinat@gmx.de> wrote:
> > + for (i = 0; i <= highest_reg; i+= 4)
> > + writel(0x0, engine + i);
> > +
>
> this obsoletes
> /* Init 2D engine reg to reset 2D engine */
> writel(0x0, engine + VIA_REG_KEYCONTROL);
> as VIA_REG_KEYCONTROL is 0x02C.
Ah, good point, the separate write is superfluous. Removed.
[...]
> > +#define VIA_REG_MONOPATBGC_M1 0x05C /* Add FG color of Pattern. */
> > +#define VIA_REG_COLORPAT_M1 0x100 /* from 0x100 to 0x1ff */
> > +
>
> All of these defines are unused. I admit that it is my fault. I've not
> yet found a way I like to use them as the meaning of the same hardware
> address changed. I think the most clean long term solution would be to
> put the engines in separate files and the definitions in private headers
> to at least avoid the need to decode the engine version in the name.
> However as the old headers already contain a bunch of trash feel free to
> ignore this issue and add it for now.
Harald's initial patch included a mechanism for remapping register writes
on the fly depending on which engine was in use; these defines were used
for that purpose. Your reworking of the 2D code obliterated that patch,
and made it mostly unnecessary. I kept the defines around, though, because
I thought that documenting the registers can only be a good thing.
Thanks,
jon
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
_______________________________________________
Linux-fbdev-devel mailing list
Linux-fbdev-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-fbdev-devel
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic