/usr/src/linux/Documentation/fb/aty128fb.txt (fwd)

/usr/src/linux/Documentation/fb/aty128fb.txt (fwd)

[Geert Uytterhoeven]

---------- Forwarded message ----------
Date: Mon, 4 Oct 2004 11:59:47 -0700
From: Eric Pretorious <eric@pretorious.net>
To: Brad Douglas <brad@neruo.com>
Cc: geert@linux-m68k.org
Subject: /usr/src/linux/Documentation/fb/aty128fb.txt

Hi, Brad:

One other nitpick: In the "Configuration" section you wrote...

>Accepted options:
>
><XxX@X>  - selects startup videomode. See modedb.txt for detailed
>           explanation. Default is 640x480x8bpp.

Should the values be enclosed - as illustrated - in brackets? (I've been 
passing the value using the "vga=0x317".) The framebuffer.txt file describes 
it like this...

>To specify a video mode at bootup, use the following boot options:
>    video=<driver>:<xres>x<yres>[-<bpp>][@refresh]

-- 
Eric P.,
Sunnyvale, CA


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Re: /usr/src/linux/Documentation/fb/aty128fb.txt (fwd)

[Antonino A. Daplas]

On Tuesday 05 October 2004 03:19, Geert Uytterhoeven wrote:
> ---------- Forwarded message ----------
> Date: Mon, 4 Oct 2004 11:59:47 -0700
> From: Eric Pretorious <eric@pretorious.net>
> To: Brad Douglas <brad@neruo.com>
> Cc: geert@linux-m68k.org
> Subject: /usr/src/linux/Documentation/fb/aty128fb.txt
>
> Hi, Brad:
>
> One other nitpick: In the "Configuration" section you wrote...
>
> >Accepted options:
> >
> ><XxX@X>  - selects startup videomode. See modedb.txt for detailed
> >           explanation. Default is 640x480x8bpp.
>
> Should the values be enclosed - as illustrated - in brackets? (I've been

No. Parameters in brackets are meant to be optional.

> passing the value using the "vga=0x317".) The framebuffer.txt file
> describes it like this...

The option "vga=xxx" is only for drivers that lets the BIOS do the mode
setup for them.  Some of these drivers are vesafb and matroxfb.

Tony




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Re: /usr/src/linux/Documentation/fb/aty128fb.txt (fwd)

[Eric Pretorious]

On Monday 04 October 2004 08:01 pm, Antonino A. Daplas wrote:
>On Tuesday 05 October 2004 03:19, Geert Uytterhoeven wrote:
>> ---------- Forwarded message ----------
>> Date: Mon, 4 Oct 2004 11:59:47 -0700
>> From: Eric Pretorious <eric@pretorious.net>
>> Subject: /usr/src/linux/Documentation/fb/aty128fb.txt
>>
>> >Accepted options:
>> >
>> ><XxX@X>  - selects startup videomode. See modedb.txt for detailed
>> >           explanation. Default is 640x480x8bpp.
>>
>> Should the values be enclosed - as illustrated - in brackets? (I've been
>
>No. Parameters in brackets are meant to be optional.

1. *All* of the options are optional but they aren't enclosed in < or >.
2. Those aren't the usual "this-is-optional" kind of brackets - i.e., [ and ] 
- but I do see your point. From /usr/src/linux/Documentation/fb/modedb.txt:

  To specify a video mode at bootup, use the following boot options:
    video=<driver>:<xres>x<yres>[-<bpp>][@refresh]

>> passing the value using the "vga=0x317".) The framebuffer.txt file
>> describes it like this...
>
>The option "vga=xxx" is only for drivers that lets the BIOS do the mode
>setup for them.  Some of these drivers are vesafb and matroxfb.

I dont' know if it's *supposed*to* but the "vga=xxx" works with aty128fb. 
(It's the only way that I've gotten it to work so far. I'll retest *without* 
the <...> and report back later.

Thanks for the clarification!  :^)

-- 
Eric P.,
Sunnyvale, CA


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Re: /usr/src/linux/Documentation/fb/aty128fb.txt (fwd)

[Geert Uytterhoeven]

On Mon, 4 Oct 2004, Eric Pretorious wrote:
> On Monday 04 October 2004 08:01 pm, Antonino A. Daplas wrote:
> >On Tuesday 05 October 2004 03:19, Geert Uytterhoeven wrote:
> >> passing the value using the "vga=0x317".) The framebuffer.txt file
> >> describes it like this...
> >
> >The option "vga=xxx" is only for drivers that lets the BIOS do the mode
> >setup for them.  Some of these drivers are vesafb and matroxfb.
> 
> I dont' know if it's *supposed*to* but the "vga=xxx" works with aty128fb. 
> (It's the only way that I've gotten it to work so far. I'll retest *without* 
> the <...> and report back later.

That depends on the driver. `vga=' is not handled by the frame buffer device,
but by the early startup code that calls the BIOS to change the video mode.
And it depends on the fbdev driver if it cope with a graphics chip initialized
to something different than VGA text mode. Drivers used on PowerMac usually do,
because Open Firmware gives them graphics mode as well.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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