From: Antonino A. Daplas <adaplas@gmail.com>
Date: Mon, 1 Aug 2005 15:51:34 +0000 (+0800)
Subject: [PATCH] tridentfb: Fix scrolling artifacts during disk IO
X-Git-Tag: v2.6.13-rc5~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d894c47975f7222c5537e450e71310b395488c7;p=pandora-kernel.git

[PATCH] tridentfb: Fix scrolling artifacts during disk IO

Reported by: Jochen Hein (Bugzilla Bug 4312)

When there is disk I/O happening, the framebuffer has a little snow on
the screen.  Once I/O has finished, no garbage remains on screen.

This bug was explained by: Knut Petersen

Most important is CRTC register 2f, signal quality is also improved for
higher vclk values by changing set_vclk() according to the X drivers and
cyblafb.c

The fix is to set the performance register (0x2f) with a more stable
value.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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