Hi Daniel, hi others,
did even more experiments. I guess I understand now better. Indeed, the
trouble seems to be the watermark levels. I played more
with all that, and the real culprit seems to be the FW_BLC register
controlling the watermarks.
On the i830 with the current settings, it is defined to be 0x1080304
which sets the watermark a bit too low. If I set it to
0x1080306 instead, I get a stable display in all panning positions
(hurray!).
I would like to fix this, but I guess I would need to understand the
logic a little bit better. At the time being, you probably better
put the linear frame buffer workaround on hold, it looks I really got
something here.
Greetings,
Thomas
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