[PATCH v2 0/5] OvmfPkg: simply use the Bochs interface for vmsvga

[yuchenlin@synology.com]

From: yuchenlin <yuchenlin@synology.com>

In this series, replace the original vmsvga driver to Bochs
interface.

Simply revert vmsvga driver implementation. After it, use Bochs
interface for initializing vmsvga.

Because of the PCI BARs difference between std vga and vmsvga.
We can not simply recognize the "QEMU VMWare SVGA" as the
QEMU_VIDEO_BOCHS_MMIO variant.

BAR  |    std vga     |  vmsvga
---------------------------------
0    |   Framebuffer  | I/O space
1    |   Reserved     | Framebuffer
2    |   MMIO         | FIFO

To overcome this problem, we remain variant QEMU_VIDEO_VMWARE_SVGA,
and use it for:

(1) Get framebuffer from correct PCI BAR
(2) Prevent using BAR2 for MMIO

We have tested on qemu before and after commit 104bd1dc70 and all
worked.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: yuchenlin <yuchenlin@synology.com>

Changelog:
v1 -> v2
* use 'else' clause (Thanks Philippe).
* add more comment in revert patches (Thanks Philippe).
* reorder the revert patches, we should revert the last commit first.
* use correct framebuffer to ClearScreen.
* revert VMWare svga definitions.

yuchenlin (5):
  Revert "OvmfPkg/QemuVideoDxe: list "UnalignedIoInternal.h" in the INF
    file"
  Revert "OvmfPkg/QemuVideoDxe: VMWare SVGA device support"
  Revert "OvmfPkg/QemuVideoDxe: Helper functions for unaligned port
    I/O."
  Revert "OvmfPkg: VMWare SVGA display device register definitions"
  OvmfPkg: simply use the Bochs interface for vmsvga

 OvmfPkg/Include/IndustryStandard/VmwareSvga.h | 104 ------------
 OvmfPkg/QemuVideoDxe/Driver.c                 | 141 ++--------------
 OvmfPkg/QemuVideoDxe/Gop.c                    |  68 +-------
 OvmfPkg/QemuVideoDxe/Initialize.c             | 157 ------------------
 OvmfPkg/QemuVideoDxe/Qemu.h                   |  27 ---
 OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf         |   7 -
 OvmfPkg/QemuVideoDxe/UnalignedIoGcc.c         |  70 --------
 OvmfPkg/QemuVideoDxe/UnalignedIoIcc.c         |  80 ---------
 OvmfPkg/QemuVideoDxe/UnalignedIoInternal.h    |  59 -------
 OvmfPkg/QemuVideoDxe/UnalignedIoMsc.c         |  78 ---------
 OvmfPkg/QemuVideoDxe/UnalignedIoUnsupported.c |  66 --------
 11 files changed, 19 insertions(+), 838 deletions(-)
 delete mode 100644 OvmfPkg/Include/IndustryStandard/VmwareSvga.h
 delete mode 100644 OvmfPkg/QemuVideoDxe/UnalignedIoGcc.c
 delete mode 100644 OvmfPkg/QemuVideoDxe/UnalignedIoIcc.c
 delete mode 100644 OvmfPkg/QemuVideoDxe/UnalignedIoInternal.h
 delete mode 100644 OvmfPkg/QemuVideoDxe/UnalignedIoMsc.c
 delete mode 100644 OvmfPkg/QemuVideoDxe/UnalignedIoUnsupported.c

-- 
2.18.0