Re: [PATCH] radeonfb ATI 9100IGP shared main memory / VRAM

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Wed, 2005-12-21 at 21:37 +0100, Harald Welte wrote:

> I've altered radeon_base.c with a special exception for this chip, see
> the patch below.  Now everything works like a charm.

Hi !

Actually, this isn't the right way, the PCI resource might be bigger
than the RAM assigned to the IGP chip. I'll try to get something better
for you. The thing to do looks like that in X:

    else if ((info->ChipFamily == CHIP_FAMILY_RS100) ||
	     (info->ChipFamily == CHIP_FAMILY_RS200) ||
	     (info->ChipFamily == CHIP_FAMILY_RS300)) {
        CARD32 tom = INREG(RADEON_NB_TOM);

	pScrn->videoRam = (((tom >> 16) -
			    (tom & 0xffff) + 1) << 6);

	OUTREG(RADEON_CONFIG_MEMSIZE, pScrn->videoRam * 1024);

With
	#define RADEON_NB_TOM                       0x15c

Ben.




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