On Saturday 11 December 2004 04:44, Lucas Correia Villa Real wrote:

Hi,

I'm trying to use atyfb on 2.6.10-rc3, but I'm getting a kernel oops just
at modprobe time. By tracking the problem, it seems that 'pll_limits.xclk'
is the heart of the problem, as seen in line 2210 from atyfb_base.c:

par->xclk_per = 1000000/par->pll_limits.xclk;

It happens that pll_limits.xclk is zero, because of an attribution made on
line 3246:

par->pll_limits.xclk = pll_block.XCLK_max_freq/100;

pll_block.XCLK_max_freq, in this case, is read from BIOS a few lines above
(at line 3229, to be more precise), and the value being returned from this
copy here is 20. So we have a problem, since the result from 20/100 = 0
will be used as denominator to set par->xclk_per's value.

Buggy BIOS?  Why not skip the init_from_bios() step, since xclk will be
initialized in the function correct_chipset(), just a few lines above?

If that works, perhaps a boot option can be added such as no_bios?

Tony




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