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modes: Fix duplicate detection, and do it more consistently 

Signed-off-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Adam Jackson 2009-10-28 15:44:37 -04:00
parent ba2d39dd54
commit 7c0803f555
4 changed files with 39 additions and 31 deletions
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31
hw/xfree86/modes/xf86Crtc.c
View File

@ -1377,34 +1377,6 @@ xf86InitialPanning (ScrnInfoPtr scrn)
}
}
/*
* XXX walk the monitor mode list and prune out duplicates that
* are inserted by xf86DDCMonitorSet. In an ideal world, that
* function would do this work by itself.
*/
static void
xf86PruneDuplicateMonitorModes (MonPtr Monitor)
{
DisplayModePtr master, clone, next;
for (master = Monitor->Modes;
master && master != Monitor->Last;
master = master->next)
{
for (clone = master->next; clone && clone != Monitor->Modes; clone = next)
{
next = clone->next;
if (xf86ModesEqual (master, clone))
{
if (Monitor->Last == clone)
Monitor->Last = clone->prev;
xf86DeleteMode (&Monitor->Modes, clone);
}
}
}
}
/** Return - 0 + if a should be earlier, same or later than b in list
*/
static int
@ -1575,9 +1547,6 @@ xf86ProbeOutputModes (ScrnInfoPtr scrn, int maxX, int maxY)
maxY = config->maxHeight;
}
/* Elide duplicate modes before defaulting code uses them */
xf86PruneDuplicateMonitorModes (scrn->monitor);
/* Probe the list of modes for each output. */
for (o = 0; o < config->num_output; o++)
{

2
hw/xfree86/modes/xf86EdidModes.c
View File

@ -1082,6 +1082,8 @@ xf86DDCGetModes(int scrnIndex, xf86MonPtr DDC)
if (quirks & DDC_QUIRK_PREFER_LARGE_75)
xf86DDCSetPreferredRefresh(scrnIndex, Modes, 75);
Modes = xf86PruneDuplicateModes(Modes);
return Modes;
}

34
hw/xfree86/modes/xf86Modes.c
View File

@ -691,3 +691,37 @@ xf86GetDefaultModes (void)
}
return head;
}
/*
* Walk a mode list and prune out duplicates. Will preserve the preferred
* mode of an otherwise-duplicate pair.
*
* Probably best to call this on lists that are all of a single class
* (driver, default, user, etc.), otherwise, which mode gets deleted is
* not especially well defined.
*
* Returns the new list.
*/
DisplayModePtr
xf86PruneDuplicateModes(DisplayModePtr modes)
{
DisplayModePtr m, n, o;
top:
for (m = modes; m; m = m->next) {
for (n = m->next; n; n = o) {
o = n->next;
if (xf86ModesEqual(m, n)) {
if (n->type & M_T_PREFERRED) {
xf86DeleteMode(&modes, m);
goto top;
}
else
xf86DeleteMode(&modes, n);
}
}
}
return modes;
}

3
hw/xfree86/modes/xf86Modes.h
View File

@ -95,6 +95,9 @@ extern _X_EXPORT void
xf86PruneInvalidModes(ScrnInfoPtr pScrn, DisplayModePtr *modeList,
Bool verbose);
extern _X_EXPORT DisplayModePtr
xf86PruneDuplicateModes(DisplayModePtr modes);
extern _X_EXPORT void
xf86ValidateModesFlags(ScrnInfoPtr pScrn, DisplayModePtr modeList,
int flags);