xf86-video-wsfb: Add support for 16 color mode on Amiga

- Sets up 8bpp shadow framebuffer with depth 4
- Bitplane conversion done in shadow update function
- Adds new shadow update function shadowUpdateAfb4x8,
which is a slightly modified version of existing shadowUpdateAfb4/8.

Discussion on tech-x11: http://mail-index.netbsd.org/tech-x11/2024/02/29/msg002447.html

Handle "LSBit is left" bitorder VRAM of smg(4) and qv(4) on VAXen.

Confirmed on smg(4) on my VAXstation 3100/30.
Should be pulled up to netbsd-10.

xf86-video-wsfb: Add support for Nintendo Wii

The Wii's framebuffer is YUY2, so add a custom shadowproc that converts
from RGB565 to YUY2 on the fly.

wsfb: disable xf86DisableRandR() only on newer X.org Servers.

ABI_VIDEODRV_VERSION has been bumped to 24.0 since xorg-server-1.20.0:
https://gitlab.freedesktop.org/xorg/xserver/-/commit/3f9507ed2f7246b2c8cf2bbc430cc99c5f35c92a
https://gitlab.freedesktop.org/xorg/xserver/-/commit/dd00e5466a0e4ea313d1860824da4123692827ed

wsfb: reduce diffs from upstream.

Mostly pulled/merged from the following upstream changes:

- Fix for dlopen() -based module loader.
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/b77092858a178aa169ed4c1c7fe733d5cd355702

- Remove useless loader symbol lists.
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/bce9fd21483fbeddc84672a1ef01fdd9b58c88ed

- Add compat-api.h for compatibility with xserver 1.13
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/586b722fb17b3eb0ab776c170ee21e6a66fc7f22

- Use own thunk functions instead of shadow*Weak
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/fa9aabe95a65c4dd12008e16ad66d5c773a7993a

- Remove obsolete #ifdef HAVE_XF1BPP and #ifdef HAVE_XF4BPP blocks,
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/16ac29883cb80053fb0b973166a3f664cae1fa44

- Remove unused variables
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/1c1bf30b612933a3303d414c75671c9a05ec450a

- Suppress a bunch of compiler warnings for using constant strings
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/1ff2e87ea1c19d1417b11886d940e205be376d78

- Replace LoaderGetOS with ifdef
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/8069c6970c731c38e105f5dddd5ce83ba88b0773

- Fix spelling/wording issues
https://gitlab.freedesktop.org/xorg/driver/xf86-video-wsfb/-/commit/27c2d76404c7b440a6662446b189fa257c4cebfc

With minor adjustments:
- sync order of members in private struct WsfbRec
- add more const to avoid warning
- add newlines properly to xf86Msg() messages

No particular objection on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/06/thread1.html#002311

wsfb: add 8bpp planar support for LUNA using amiga's Afb.

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

Confirmed on my LUNA-II with 8bpp board.

wsfb: fix mmap size in Afb planar case.

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

"Looks like good improvement" from jandberg@ and also confirmed by rin@.

wsfb: reorganize implementation of Afb support.

- use XORG_VERSION_NUMERIC() to check if Afb is avaiable and
define and use explicit HAVE_SHADOW_AFB macro
- disable all Afb references if it is not available

Reviewed on tech-x11@:
https://mail-index.netbsd.org/tech-x11/2022/08/23/msg002311.html

"Looks like good improvement" from jandberg@ and also confirmed by rin@.

various updates to build against xorg-server 21.1.3.

- avoid a const issue with an expanded __UNCONST().
- cope with renamed member names
- deal with "xf86RamDac.h" going away (now use "xf86Cursor.h")

For xorg-server 1.10, do not require shadowUpdateAfb8() as
a runtime dependency.

Fix build for xorg-server 1.10, which doesn't have shadowUpdateAfb8().

For amiga, fall back to 1-bpp on xorg-server 1.10.

NFC for xorg-server 1.20 and higher.

For WSDISPLAY_TYPE_AMIGACC, no need to check ifdef __NetBSD__.

Note that similar block for WSDISPLAY_TYPE_LUNA should be guarded by
``#if defined(__NetBSD__) && defined(WSDISPLAY_TYPE_LUNA)'' on the
other hand; this is intended to distinguish NetBSD and OpenBSD.

Style. NFC.

Add support for 8bpp with Amiga native graphics.

Conversion to bitplane format is done in shadowfb update proc.

Add missing newlines in log messages.

Fix Xorg wsfb server "Rotate" corruption problem. PR xsrc/54167

Confirmed on zaurus SL-C1000, SL-C3000 (CW) and hpcarm WS003SH (CCW).
Should be pulled up to netbsd-8 and netbsd-9.

Correctly support the case of fbi->fbi_fboffset != 0, which means base
address of framebuffer is not page-aligned:

- When mmap framebuffer, fbi->fbi_fboffset is added to the length of
framebuffer. Otherwise, the last page of framebuffer is not mapped
properly if (size of framebuffer) <= (page boundary) < (size of
framebuffer + fbi->fbi_fboffset), since length of mapped area is
counted from page-truncated address. This results in memory
corruption in the upper adjacent page, or SEGV.

- Use fPtr->fbstart (real base address of framebuffer) instead of
fPtr->fbmem (return value of mmap, i.e., page-aligned base address)
where appropriate.

Tested on genfb(4) on Cubietruck, where fbi->fbi_fboffset = 4096.

No functional changes for majority of framebuffer drivers, whose base
address is page-aligned.

Add support for 15-bpp framebuffer.

The modesetting driver and wsfb access the same hardware but through
different interfaces (/dev/dri/card0 vs /dev/ttyE0). To prevent both
drivers from being active at once, skip wsfb probe if the modesetting
driver has claimed the fb slot.

various updates for xorg-server 1.20. some of these are work-in-progress,
the xsrc build is broken for most ports currently.

- xf86DisableRandR() is gone
- use HAVE_NOTIFY_FD like other modern drivers in compat-api.h
- pRotatedPixmap is done
- some PixmanPtr is now DrawablePtr (this one is all over problem with many
consumers, and perhaps the major breakage point currently.)

updates for xorg-server 1.20:

- xf86GetOS()/LoaderGetOS() have been replaced. replace them with
direct platform #ifdefs for now.
- shadowUpdatePackedWeak() is gone, use local thunks.
- xf86DisableRandR() is gone, disable it (should be obsolete)

actually use wsdisplayio_fbinfo::fbi_fboffset

support WSFB_VRAM_IS_SPLIT workaround for wildcat boards - use a shadow fb
and copy dirty areas into both framebuffers
now we can use X on Sun XVR-1200
should work on XVR-500 and others as well

prune xrefs to xorgconfig

port xf86-video-wsfb to compat-api.h style interfaces

mibstore.h and its miInitializeBackingStore() have been otherwise empty
since at least xorg-server 1.10. remove all reference to them as the
header is gone in xorg-server 1.18.

add a shadowfb update function which endian-swaps 32bit pixels, use if we
have hardware with BGRA pixel format ( like a wrong-endian ARGB framebuffer )
with this applications that use xrender work properly on things like mgx in
32bit colour

Add kludge to use luna68k 4/8bpp framebuffers as a monochrome server.

The idea is taken from mlterm-fb --depth option implementation.

This change should not affect other framebuffer types.
Tested on 4bpp on LUNA and 1bpp/8bpp on LUNA-II.

Add one more cmsize == 0 check before PUTCMAP ioctl.

No need to handle colormap ioctls if cmsize == 0 even in WSFB_CI case.

Fix wrong VRAM size calculation on old drivers without GET_FBINFO ioctl.

The linebytes is a byte number of width so it should be
(linebytes * height), not (width * linebytes).

XXX: I'm not sure where WSDISPLAYIO_GET_FBINFO implementation was discussed
but I wonder if we should use proper ifdef or macro to share this
third party Xorg driver with OpenBSD...

make Option "HWCursor" actually work, default to true

CARD32 might be unsigned int or unsigned long, depending on platform,
so cast to unsigned int when printing.

fix a merge botch.

update for xf86-video-wsfb 0.4.0

merge xf86-video-wsfb 0.4.0

initial import of xf86-video-wsfb-0.4.0

Call removeShadow only when shadowFB has been initialized.

call ioctl(WSDISPLAYIO_SMODE, ...) in EnterTV/LeaveVT so kernel graphics
drivers get notified when we switch in and out of X

use WSDISPLAYIO_GET_FBINFO if available

WSDISPLAY_TYPE_VC4 framebuffer is BGR

Make wsfb driver work with 1bpp wscons framebuffer on luna68k:
- Pass proper args (a number of line dots, not byte of screen width)
to fbScreenInit() in 1bpp case, as X11R6 Xhpc server did
- handle luna68k quirk (fbstart has 8 byte offset) by WSDISPLAYIO_GTYPE
(XXX wstype should be stored in pScrn?)
- set rgbBits properly in 1bpp and 4bpp cases
(XXX not sure if really necessary)

Remove obsolete #ifdef HAVE_XF1BPP and #ifdef HAVE_XF4BPP blocks,
which have been removed on xorg-server 1.6.1.190 merge:
http://mail-index.NetBSD.org/source-changes/2009/06/11/msg222272.html

xf86LoaderReqSymbols() is no more

Add headers for missing prototypes and missing prototypes

fix the previous - use GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) > 6.

copy a hack from the vmware driver, and avoid using xf86LoaderReqSymLists()
and LoaderRefSymLists() in xorg-server >= 1.7.

Regenerate to match current source
* Commented entries added (HAVE_XF1BPP, HAVE_XF4BPP)

use BGR on XVR-1000

Enable shadowFB for rotate option.

merge 0.3.0

build fix for 0.3.0.

merge xf86-video-wsfb 0.3.0

initial import of xf86-video-wsfb-0.3.0

new generated files

xf86_ansic.h is no more.
use <errno.h> and <sys/mman.h> always.
remove no longer working 1 and 4 bpp. :-(

add hw cursor support and unbork shadow fb support.
TODO: find out how shadow fb is supposed to work in Xorg

initial import of xf86-video-wsfb-0.2.1