From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Richter <thor@math.tu-berlin.de>
Subject: i830 watermark problems - status?
Date: Mon, 25 Nov 2013 16:14:12 +0100
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To: intel-gfx@lists.freedesktop.org, Daniel Vetter <daniel@ffwll.ch>
List-Id: intel-gfx@lists.freedesktop.org

Hi Daniel, hi group,

just being curious - what is the status of the i830 watermark problems, 
i.e. the state of affairs
concerning that the i830 does not allow the maximum watermark value, but 
requires a "headroom" of eight entries to
avoid flickering.

I provided a patch for this a while ago, but this seems to go nowhere. 
Just to remind you: The current code does not create
a stable image on i830 based devices, even if only an internal display 
is connected.

I provided two possible attacks to the problem: A quick and dirty method 
which checks for the maximum value for
i830 manually, or an overall solution which adds a "minimum" watermark 
value for all supported chipsets.

Please let me know how to proceed.

Thanks,
     Thomas