This is a squash merge containing all the API changes, as
well as the video ABI bump.
Its been squashed to make bisection easier.
Full patch log below:
commit b202738bbf0c5a1c1172767119c2c71f1e7f8070
Author: Aaron Plattner <aplattner@nvidia.com>
Date: Mon May 14 15:16:11 2012 -0700
xfree86: Bump video ABI to 13.0
The ABI was broken by changes to convert from screen index numbers to ScreenPtr
/ ScrnInfoPtr in various structures and function signatures.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 3d5f7d9f8d408bcad3f83277d255f25d3b0edbf3
Author: Dave Airlie <airlied@redhat.com>
Date: Thu May 24 10:56:57 2012 +0100
xf86: xf86ClearEntityListForScreen should take a pScrn
When adding GPU screens this make life easier.
(also fix comment, as pointed out by Alan)
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit afee8b5ab4501597ecc1ade34124d7ca227ab055
Author: Dave Airlie <airlied@redhat.com>
Date: Thu May 24 07:07:32 2012 +0100
xf86i2c: add pscrn for drivers to use
This just adds a pScrn pointer into the struct for the drivers to use
instead of scrnIndex. Mostly scrnIndex is used for logging, but some
drivers use it to lookup xf86Screens, so let them stash a pScrn instead.
Removing the scrnIndex is a bit more involved and I'm not sure its worth
the effort. Doing i2c in the X server is legacy code as far as I'm concerned.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit ea5092f1f679691d187f1eee9427e6057beec56e
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 19:25:20 2012 +0100
dix/gc: consolidate GC object creation in one place
The standard GC create and scratch GC create were 90% the same really,
and I have a need in the future for creating GC objects without the
other bits, so wanted to avoid a third copy.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 3d91482ea9b4883e64e496f2768168e0ffa21ba1
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 10:24:06 2012 +0100
xf86: add a define to denote the new non-index interfaces are being used
This can be used by drivers to provide compatible APIs.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 37c3ae3e6cd4f3dedc72f371096d6743f8f99df3
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 15:09:12 2012 +0100
dix: make Create/Free scratch pixmaps take a ScreenPtr
While technically an API/ABI change I doubt anyone uses it,
but it helps in splitting screens up.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 75f2062a3fe94f04764ecc7d2ff2fbbeccb9da60
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 14:57:55 2012 +0100
xf86/xv: remove scrnIndexfrom xf86FindXvOptions.
Move this interface to taking an ScrnInfoPtr.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit f80c2374f40ea7b2ee0556e2e76cc07406f3d843
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 14:53:59 2012 +0100
xf86: make xf86DeleteScreen take a ScrnInfoPtr (v2)
stop passing indices into this function.
v2: drop flags argument.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 58824e414f35682435f15bfe6c4b656bd90b9235
Author: Dave Airlie <airlied@redhat.com>
Date: Wed May 23 14:48:09 2012 +0100
xf86: fix xf86IsScreenPrimary interface to take a pScrn (API/ABI)
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 6b4fc1f9d391bcdf7ca288766e49bce60f4635cd
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:18:59 2012 +0100
xserver: convert block/wakeup handlers to passing ScreenPtr (ABI/API) (v2)
Instead of passing an index, pass the actual ScreenPtr. This allows
more moving towards not abusing xf86Screens + screenInfo.
v2: drop the blockData/wakeupData args as per ajax's suggestion.,
fix docs.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 790d003de20fb47674420a24dadd92412d78620d
Author: Dave Airlie <airlied@gmail.com>
Date: Wed Apr 11 09:53:14 2012 +0100
xf86/common: remove some more pScrn->pScreen uses
remove some more conversions that appeared after api cleanups.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit aac85e18d1dd093f2cad6bd29375e40bd7af0b8f
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 16:34:53 2012 +0100
ddc: change API to take ScrnInfoPtr (v2)
This removes all xf86Screens usage from ddc code,
it modifies the API for some functions to avoid taking indices.
v2: address Alan's comments about dropping DDC2Init parameter.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit fe3f57b6eaf6860a33876a54f9439f69578f03a5
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 16:31:26 2012 +0100
vbe: don't use index for VBEInterpretPanelID (API)
Remove use of xf86screens from vbe module.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit abf1965f4ed91529036d3fdb470d6a3ce6f29675
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 16:25:11 2012 +0100
int10/vbe: don't use xf86Screens. (ABI) (v3)
Pass the ScrnInfoPtr instead of the index in the int10 struct.
This saves us using it to dereference xf86Screens.
v2: address Alan's comment to fix struct alignment.
v3: squash in all the int10 fixes, test the vm86 code builds,
after comments by Keith.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 23cca612b4fb5efc33683c7624b803b457387e3d
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:30:18 2012 +0100
xserver: drop index argument to ScreenInit (ABI/API) (v2)
This drops the index argument, its the same as pScreen->myNum,
and its the last major index abuse I can find.
v2: address Alan's review - update docs, fix xwin/xnest/darwin
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 40d360e2d7e832407f3ed64e3a02c27ecc89a960
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:23:01 2012 +0100
xf86: migrate PointerMoved from index to ScrnInfoPtr (ABI/API)
This migrates PointerMoved from an index to ScrnInfoPtr.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit aa60a2f38679d0eeb979a9c2648c9bc771409bf9
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:20:46 2012 +0100
xf86: migrate PMEvent to a ScrnInfoPtr (ABI/API)
This migrates the PMEvent from index to ScrnInfoPtr.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit d3f28ef44371ed4a039ffc5dd7eb6408d1269ba2
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:18:30 2012 +0100
xf86: migrate SetDGAMode from index to ScrnInfoPtr (ABI/API)
This migrates the SetDGAMode callback from an index to ScrnInfoPtr.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit baf5e4818a74f2b68c3dfdcc56f54322351039a0
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:14:11 2012 +0100
xf86: migrate ChangeGamma from index to ScrnInfoPtr (ABI/API) (v2)
This migrates the ChangeGamma interface to avoid passing a index.
v2: fix xf86RandR12.c + xf86cmap.c call
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 51e5f90ada929d6b23176090badbb42fdb3fa550
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:11:09 2012 +0100
xf86/exa: migrate index to screen types for EnableDisableFBAccess (ABI/API)
The EXA interface migrates to ScreenPtr,
and the xf86 interface migrated to ScrnInfoPtr.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 94f1f21d17e86f96d4a54292a399160950087675
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 15:02:11 2012 +0100
xf86: migrate ValidMode callback to ScrnInfoPtr (ABI/API)
This migrates the ValidMode to passing a ScrnInfoPtr instead
of an index.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 3f8f18198fed4f39ec805b508a3482e91eea26b2
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:59:46 2012 +0100
xf86: migrate SwitchMode to taking ScrnInfoPtr (ABI/API) (v2)
This migrate the SwitchMode interface to take a ScrnInfoPtr
instead of an index.
v2: drop flags.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit d06a038a5c49328ab3a8d969d24f9fcd22c63202
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:50:37 2012 +0100
xf86: move AdjustFrame to passing ScrnInfoPtr (ABI/API) (v2)
This converts AdjustFrame code paths to passing a ScrnInfoPtr
instead of an integer index.
v2: drop flags args.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 53d2f8608ffd4090d08e7d5cf2e92fb954959b90
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:41:27 2012 +0100
xf86: modify FreeScreen callback to take pScrn instead of index. (ABI/API) (v2)
Another index->pScrn conversion.
v2: drop flags arg.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 60db37c0b247052e0f5c54b1921fe58a3609c2e3
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:35:41 2012 +0100
xf86: change EnterVT/LeaveVT to take a ScrnInfoPtr (ABI/API break) (v2)
This modifies the EnterVT/LeaveVT interfaces to take a ScrnInfoPtr
instead of an index into xf86Screens. This allows dropping more
public dereferences of the xf86Screens and screenInfo.
v2: drop flags args as suggested by Keith, fix docs.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
commit 06729dbbc804a20242e6499f446acb5d94023c3c
Author: Dave Airlie <airlied@gmail.com>
Date: Tue Apr 10 14:04:59 2012 +0100
xserver: remove index from CloseScreen (API/ABI breakage)
This drops the index from the CloseScreen callback,
its always been useless really, since the pScreen contains it.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This is strictly the application of the script 'x-indent-all.sh'
from util/modular. Compared to the patch that Daniel posted in
January, I've added a few indent flags:
-bap
-psl
-T PrivatePtr
-T pmWait
-T _XFUNCPROTOBEGIN
-T _XFUNCPROTOEND
-T _X_EXPORT
The typedefs were needed to make the output of sdksyms.sh match the
previous output, otherwise, the code is formatted badly enough that
sdksyms.sh generates incorrect output.
The generated code was compared with the previous version and found to
be essentially identical -- "assert" line numbers and BUILD_TIME were
the only differences found.
The comparison was done with this script:
dir1=$1
dir2=$2
for dir in $dir1 $dir2; do
(cd $dir && find . -name '*.o' | while read file; do
dir=`dirname $file`
base=`basename $file .o`
dump=$dir/$base.dump
objdump -d $file > $dump
done)
done
find $dir1 -name '*.dump' | while read dump; do
otherdump=`echo $dump | sed "s;$dir1;$dir2;"`
diff -u $dump $otherdump
done
Signed-off-by: Keith Packard <keithp@keithp.com>
Acked-by: Daniel Stone <daniel@fooishbar.org>
Acked-by: Alan Coopersmith <alan.coopersmith@oracle.com>
--disable-pciaccess, used together with --disable-module-int10, can be used to
disable all pci code inside the server.
Note that XSERVER_LIBPCIACCESS was previously used only in the driver side and
now it defines also whether the library is used inside the server. Also,
XORG_BUS_PCI automake variable is introduced to track PCI code needs.
Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Reviewed-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Tested-by: Jeremy Huddleston <jeremyhu@apple.com>
Per-domain I/O is now something drivers must manually request, and must
keep track of within their own state rather than in the ScrnInfoRec.
It's not really possible to split that into two steps without an
additional intermediate ABI break, so don't even try. Drivers that want
source compatibility should ifdef on the presence of xf86UnmapLegacyIO.
As a fringe benefit, domain-aware I/O is now OS-independent, relying
only on support in pciaccess. Simplify OS PCI setup to reflect this.
The IOADDRESS type is kept around to help drivers through the API
transition and will be removed at some point in the future.
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Tested-by: Jeremy Huddleston <jeremyhu@apple.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Back when we had RAC this was a vaguely meaningful thing. Since then
it's been a glorified (and confusing) wrapper around xf86BlockSIGIO.
Note that the APM and VT switch code are unusual relative to other code
that cares about SIGIO state. Most callers push a SIGIO disable to
create a critical section for the duration of the caller's stack frame,
but those two effectively disable SIGIO after their return and re-enable
on their next entry.
Reviewed-by: Tiago Vignatti <tigo.vignatti@nokia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Add a new hook ModeSet that will be called after display mode is
changed, or after the display has been panned.
Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Reviewed-by: Luc Verhaegen <luc.verhaegen@basyskom.de>
ScrnInfo->pixmapPrivate only existed in order to catch invalid access to
the framebuffer by making the backing data NULL across the VT switch.
This was causing more confusion in the higher layers during mode setting
without any real benefit, so remove it.
v2: Kill ShadowModifyPixmapHeader() as well.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Julien Cristau <jcristau@debian.org>
Cc: Andrew Guertin <lists@dolphinling.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This struct is superfluous, maintaining the same info as the InputInfoRec
(with the exception of the driver name).
This is a rather large commit with the majority of changes being a rename
from the fields of the IDevRec (idev, commonOptions) to the InputInfoRec
(pInfo, options).
The actual changes affect the initialization process of the input device:
In NewInputDeviceRequest, the InputInfoRec is now always allocated and just
added to the internal list in xf86NewInputDevice() if the init process
succeeded.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Tiago Vignatti <tiago.vignatti@nokia.com>
InputAttributes largely decide which configuration values get merged from
the xorg.conf.d snippets. While they are available in the config backend,
they are not available for any other callers of NewInputDeviceRequest().
Drivers implementing driver-side hotplugging do not have access to these
attributes and cannot have xorg.conf.d snippets specific to dependent
devices. For example, the following case cannot work right now:
Section "InputClass"
MatchProduct "Wacom"
Option "PressCurve" "0 0 100 100"
...
EndSection
Section "InputClass"
MatchProduct "Wacom"
MatchProduct "eraser"
Option "PressCurve" "10 10 50 50"
...
EndSection
The second section is not triggered, as the wacom driver cannot supply the
InputAttributes to NewInputDeviceRequest().
Add the attributes to the IDevRec and merge them into the InputInfoRec to
make them accessible in the driver. This changes the ABI for input drivers.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
ba2d39dd54 introduced warnings:
xf86Mode.c: In function ‘xf86CheckModeForDriver’:
xf86Mode.c:986: warning: passing argument 1 of ‘modeInClockRange’ from incompatible pointer type
xf86Mode.c:253: note: expected ‘ClockRangePtr’ but argument is of type ‘ClockRangesPtr’
xf86Mode.c:1002: warning: passing argument 1 of ‘modeInClockRange’ from incompatible pointer type
xf86Mode.c:253: note: expected ‘ClockRangePtr’ but argument is of type ‘ClockRangesPtr’
Because I foolishly didn't notice that we had types with nearly
identical members named ClockRange and ClockRanges. The latter
contained an extra 'strategy' member at the end, which claimed to be
needed by the vidmode extension. Of course, this was a lie: the only time
we'd use it was in mode validation, for drivers using LOOKUP_CLKDIV2 with
non-programmable clocks. The only driver using LOOKUP_CLKDIV2 is
rendition, which has a programmable clock. The only driver using the
ClockRanges type was smi, which did not use it for its 'strategy' member,
so has been fixed to use ClockRange instead.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Existing video drivers will get the console enabled by default.
Signed-off-by: Jamey Sharp <jamey@minilop.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
This adds support for using the libpciaccess interface for
vga arbitration support on top of a kernel which supports it.
Currently patches are queued for kernel 2.6.32 in jbarnes
pci tree, and shipping in Fedora kernel.
Co-authors:
Tiago Vignatti <tiago.vignatti@nokia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
No one is using bus notifications now. We hope that the kernel take care of
this properly.
For other not-so-urgent-notifications (ACPI wakeups, etc) we can just register
a handler on server's scheduler (using xf86AddGeneralHandler). And for
external applications, the "trend" is to use HAL to kick notifications. So
we're already provided of enough notification schemes.
Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
This changes the ABI, but since the video ABI is at 6 already
it should be fine.
driver changes are in the pipeline after this.
Signed-off-by: Dave Airlie <airlied@redhat.com>
The nvidia driver currently uses these callbacks to work around problems where
RAC will disable access to the hardware at unexpected times. This change
restores these hooks until we can come up with a better API for working around
RAC.
This reverts commit d7c0ba2e9e.
Conflicts:
hw/xfree86/loader/xf86sym.c
There's no need to store the slot information for a PCI device as its
ID. Instead, skip the middle man and just store a pointer to the
pci_device structure.
Conflicts:
hw/xfree86/common/xf86Init.c
hw/xfree86/int10/pci.c
hw/xfree86/scanpci/xf86PciData.h
hw/xfree86/scanpci/xf86PciStdIds.h
hw/xfree86/scanpci/xf86PciStr.h
hw/xfree86/scanpci/xf86ScanPci.h
hw/xfree86/utils/pcitweak/pcitweak.c
hw/xfree86/utils/scanpci/scanpci.c
Re-removed most of the conflicting files.
Get rid of almost all uses of these definitions. They're still defined for
delinquent out-of-tree drivers, and also for the Mesa build. As well as
for miinitext.c. But largely gone.
Class information is not, and never has been, stored there. Therefore,
this is just a bunch of elaborate code to read 0x00000000.
This has received testing on x86 and x86-64 Linux.
- add hw/xfree86/utils/cvt/, cvt.c, cvt.man.pre and Makefile.am.
- Adjust configure.ac and hw/xfree86/utils/Makefile.am for cvt.
- Add MonPtr->reducedblanking and Option "ReducedBlanking" to the Monitor
section.
- Check for reduced blanking in xf86CheckModeForMonitor and disallow modes
with less than 25% blanking otherwise.
- Fix some warnings in hw/xfree86/common/xf86Config.c.
