From 82c07f2cc748b356750329435a161b00ab88bcf7 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 8 Apr 2022 10:23:30 +0200
Subject: [PATCH] OvmfPkg/VirtioGpuDxe: add VirtioGpuGetDisplayInfo

Add support for sending a GetDisplayInfo command.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
 OvmfPkg/VirtioGpuDxe/Commands.c  | 20 ++++++++++++++++++++
 OvmfPkg/VirtioGpuDxe/VirtioGpu.h |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/OvmfPkg/VirtioGpuDxe/Commands.c b/OvmfPkg/VirtioGpuDxe/Commands.c
index b9a3ea9230..4318d3d771 100644
--- a/OvmfPkg/VirtioGpuDxe/Commands.c
+++ b/OvmfPkg/VirtioGpuDxe/Commands.c
@@ -828,3 +828,23 @@ VirtioGpuResourceFlush (
            sizeof Request
            );
 }
+
+EFI_STATUS
+VirtioGpuGetDisplayInfo (
+  IN OUT VGPU_DEV                        *VgpuDev,
+  volatile VIRTIO_GPU_RESP_DISPLAY_INFO  *Response
+  )
+{
+  volatile VIRTIO_GPU_CONTROL_HEADER  Request;
+
+  return VirtioGpuSendCommandWithReply (
+           VgpuDev,
+           VirtioGpuCmdGetDisplayInfo,
+           FALSE,                     // Fence
+           &Request,
+           sizeof Request,
+           VirtioGpuRespOkDisplayInfo,
+           &Response->Header,
+           sizeof *Response
+           );
+}
diff --git a/OvmfPkg/VirtioGpuDxe/VirtioGpu.h b/OvmfPkg/VirtioGpuDxe/VirtioGpu.h
index 2155b261d4..1d781088bb 100644
--- a/OvmfPkg/VirtioGpuDxe/VirtioGpu.h
+++ b/OvmfPkg/VirtioGpuDxe/VirtioGpu.h
@@ -366,6 +366,12 @@ VirtioGpuResourceFlush (
   IN     UINT32    ResourceId
   );
 
+EFI_STATUS
+VirtioGpuGetDisplayInfo (
+  IN OUT VGPU_DEV                        *VgpuDev,
+  volatile VIRTIO_GPU_RESP_DISPLAY_INFO  *Response
+  );
+
 /**
   Release guest-side and host-side resources that are related to an initialized
   VGPU_GOP.Gop.