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Accept modes with less than 25% horizontal blanking again (you can push old 

gtf timing to below 25%), only stop cvt reduced blanking. Users should
    be free to blow up their monitors if they so choose.
This commit is contained in:
Luc Verhaegen 2006-01-31 13:04:02 +00:00
parent 701b63cf1d
commit 8f3c69dcf1
2 changed files with 21 additions and 9 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2006-01-31 Luc Verhaegen <libv@skynet.be>
* hw/xfree86/common/xf86Mode.c: (xf86CheckModeForMonitor):
Accept modes with less than 25% horizontal blanking again (you can
push old gtf timing to below 25%), only stop cvt reduced blanking.
Users should be free to blow up their monitors if they so choose.
2006-01-30 Donnie Berkholz <spyderous@gentoo.org>
* GL/mesa/shader/slang/Makefile.am:

22
hw/xfree86/common/xf86Mode.c
View File

@ -1,4 +1,4 @@
/* $XdotOrg: xserver/xorg/hw/xfree86/common/xf86Mode.c,v 1.7 2005/07/03 08:53:42 daniels Exp $ */
/* $XdotOrg: xserver/xorg/hw/xfree86/common/xf86Mode.c,v 1.8 2005/12/28 15:22:21 libv Exp $ */
/* $XFree86: xc/programs/Xserver/hw/xfree86/common/xf86Mode.c,v 1.69 2003/10/08 14:58:28 dawes Exp $ */
/*
* Copyright (c) 1997-2003 by The XFree86 Project, Inc.
@ -816,16 +816,20 @@ xf86CheckModeForMonitor(DisplayModePtr mode, MonPtr monitor)
if (mode->Flags & V_INTERLACE)
mode->CrtcVTotal = mode->VTotal |= 1;
/* Check wether this mode has acceptable blanking */
if (((mode->HDisplay * 5 / 4) & ~0x07) > mode->HTotal) {
/* Is this a CVT Reduced blanking mode? */
if ((mode->HTotal - mode->HDisplay) != 160)
return MODE_HBLANK_NARROW;
/*
* Usually, CVT normal blanking is never more than one character below 25%,
* but for low frequencies and weird ratios, you can get below that.
* When you go into the low frequencies with the gtf generator, of which
* normal CVT is a simplification, you almost always go below 25%.
*
* So if we see awkward blanking, then it's either directly CVT or GTF
* generated, or the user supposedly knows what he's doing. So we only stop
* reduced blanking here, as that might accidentally hit us. -- libv
*/
if (((mode->HTotal - mode->HDisplay) == 160) &&
(((mode->HDisplay * 5 / 4) & ~0x07) > mode->HTotal))
if (!monitor->reducedblanking)
return MODE_NO_REDUCED;
}
return MODE_OK;
}