linux-kernel - Re: Using s3virge card in Sun Blade 2000

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Message-ID: <AANLkTi=trysd5MJR2mtp-89jJiKQ+nhrGVBrwk_Q+2R8@mail.gmail.com>
Date:	Tue, 4 Jan 2011 06:37:15 +1000
From:	Dave Airlie <airlied@...il.com>
To:	alex.buell@...ted.org.uk
Cc:	David Miller <davem@...emloft.net>, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Using s3virge card in Sun Blade 2000

On Tue, Jan 4, 2011 at 5:39 AM, Alex Buell <alex.buell@...ted.org.uk> wrote:
> On Mon, 2011-01-03 at 10:58 -0800, David Miller wrote:
>> From: Alex Buell <alex.buell@...ted.org.uk>
>> Date: Mon, 03 Jan 2011 16:32:16 +0000
>>
>> > I'm aware the s3fb driver has big endian issues, I can help fix those
>> > issues so I can get the card working. Or in other words, I'd welcome
>> > advice on how to proceed with this.
>>
>> It's not endian issues, this driver has other problems.
>>
>> It uses the VGA register accessors with a NULL regbase, which is not
>> going to work on sparc64.
>>
>> It needs to access the VGA register space relative to the I/O space
>> of the PCI controller domain it is behind.
>>
>> Probably if you replace the NULL values passes to vga_r*() and
>> vga_w*() with the I/O space resource base of the chip (should be
>> resource "1") it might work.
>
> I've had a look at linux/include/video/vga.h, and yes I see what you
> mean now.
>
> Secondly, is Linux fully capable of handling different graphic cards
> simultaneously? For example, plug in a pair of monitors and have
> consoles on both with disparate graphic cards i.e. XVR-500 and S3ViRGE
> etc?

Not currently, since you would also need some way to sanely route input.

You can put different VTs on different consoles but thats about it.

Dave.
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