[PATCH] drm/mgag200: Increase bandwidth for G200se A rev1

[Roger Sewell]

Thomas,

> Could you provide us with the Xorg logs from /var/log/Xorg.0.log ,
> please?
> 
> Specifically, I'd be interested in different logs from combinations of
> the old and new kernel and the old and new userspace.

I've managed to do six of the eight possible combinations of kernel,
mgag200 module, and userspace. The attached archive contains all the
corresponding Xorg logs as well as a detailed notes file.

I couldn't do the remaining two combinations because I couldn't get the
new mgag200 module to compile for the old kernel. 

My previous theory was wrong, but hopefully the attached logs will help
you work out why the old kernel permitted the high bandwidth mode I
always use (despite returning MODE_BAD) and the new kernel doesn't.

(The "old" kernel is 9.1, i.e. 5.14.0-162.6.1.el9_1.0.1, and "new"
kernel is 9.2, i.e. 5.14.0-284.18.1.el9_2 .)

Best wishes,
Roger.

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