[patch] via_dma.c

Hi

While trying to make googleearth work on a Via Epia LN board with
openchrome and GL we noticed that the X server crashed after about
30 seconds of use.  I got a flood of the following messages.

Oct 26 12:13:24 test kernel: error: [drm:pid97391:via_hook_segment] *ERROR* 
Paused at incorrect address. 0xe1fcf300, 0xe1fc4900 0x00000000
Oct 26 12:13:24 test kernel: error: [drm:pid97391:via_hook_segment] *ERROR* 
Paused at incorrect address. 0xe1fd0300, 0xe1fc4900 0x00000000
Oct 26 12:13:24 test kernel: error: [drm:pid97391:via_cmdbuf_size] *ERROR* 
VIA_CMDBUF_LAG timed out.

Some research showed that occasionally the GPU pauses and when the
pipe is restarted, commands are reordered and the next command after
the paused command is dropped.

I located a patch which I hand applied because every chunk failed.
It has fixed the stability issue and gpu pipe restarting issue.

I still have a problem with googleearth only displaying its image
in part of the window.  It looks like the plane size is correct but
it gets the offset wrong so there is a blank on the right side the
size of the left menu pane and a blank at the bottom the size of
the window bar and menu bar at the top of the window.

Do you have any ideas how to fix this?

Ian

-- 
Ian Freislich