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Bug #9680: Remove bogus blank length limiting in xf86SetModeCrtc().

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Our modes typically come from EDID or default modes, and when the monitor
asks for a specific mode, deciding to tweak it usually results in incorrect
display.  And if the user is specifying a mode by hand, tweaking it then is
still pretty rude.

Reviewed by: ajax
This commit is contained in:
Eric Anholt 2007-01-29 09:39:33 -08:00
parent 1627af5449
commit 31f2d4a57e
1 changed files with 0 additions and 39 deletions
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39
hw/xfree86/common/xf86Mode.c
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@ -727,45 +727,6 @@ xf86SetModeCrtc(DisplayModePtr p, int adjustFlags)
}
p->CrtcHAdjusted = FALSE;
p->CrtcVAdjusted = FALSE;
/*
* XXX
*
* The following is taken from VGA, but applies to other cores as well.
*/
p->CrtcVBlankStart = min(p->CrtcVSyncStart, p->CrtcVDisplay);
p->CrtcVBlankEnd = max(p->CrtcVSyncEnd, p->CrtcVTotal);
if ((p->CrtcVBlankEnd - p->CrtcVBlankStart) >= 127) {
/*
* V Blanking size must be < 127.
* Moving blank start forward is safer than moving blank end
* back, since monitors clamp just AFTER the sync pulse (or in
* the sync pulse), but never before.
*/
p->CrtcVBlankStart = p->CrtcVBlankEnd - 127;
/*
* If VBlankStart is now > VSyncStart move VBlankStart
* to VSyncStart using the maximum width that fits into
* VTotal.
*/
if (p->CrtcVBlankStart > p->CrtcVSyncStart) {
p->CrtcVBlankStart = p->CrtcVSyncStart;
p->CrtcVBlankEnd = min(p->CrtcHBlankStart + 127, p->CrtcVTotal);
}
}
p->CrtcHBlankStart = min(p->CrtcHSyncStart, p->CrtcHDisplay);
p->CrtcHBlankEnd = max(p->CrtcHSyncEnd, p->CrtcHTotal);
if ((p->CrtcHBlankEnd - p->CrtcHBlankStart) >= 63 * 8) {
/*
* H Blanking size must be < 63*8. Same remark as above.
*/
p->CrtcHBlankStart = p->CrtcHBlankEnd - 63 * 8;
if (p->CrtcHBlankStart > p->CrtcHSyncStart) {
p->CrtcHBlankStart = p->CrtcHSyncStart;
p->CrtcHBlankEnd = min(p->CrtcHBlankStart + 63 * 8, p->CrtcHTotal);
}
}
}
/**