ui: add an optional get_flags callback to GraphicHwOps

Those flags can be used to express different requirements for the
display or other needs.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-12-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

3 files changed, 33 insertions, 0 deletions

diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 40ccd00..f27a6fb 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -114,7 +114,25 @@ virtio_gpu_gl_block(void *opaque, bool block)
     }
 }
 
+static int
+virtio_gpu_get_flags(void *opaque)
+{
+    VirtIOGPUBase *g = opaque;
+    int flags = GRAPHIC_FLAGS_NONE;
+
+    if (virtio_gpu_virgl_enabled(g->conf)) {
+        flags |= GRAPHIC_FLAGS_GL;
+    }
+
+    if (virtio_gpu_dmabuf_enabled(g->conf)) {
+        flags |= GRAPHIC_FLAGS_DMABUF;
+    }
+
+    return flags;
+}
+
 static const GraphicHwOps virtio_gpu_ops = {
+    .get_flags = virtio_gpu_get_flags,
     .invalidate = virtio_gpu_invalidate_display,
     .gfx_update = virtio_gpu_update_display,
     .text_update = virtio_gpu_text_update,
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index 81f776e..b071909 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -68,7 +68,16 @@ static void virtio_vga_base_gl_block(void *opaque, bool block)
     }
 }
 
+static int virtio_vga_base_get_flags(void *opaque)
+{
+    VirtIOVGABase *vvga = opaque;
+    VirtIOGPUBase *g = vvga->vgpu;
+
+    return g->hw_ops->get_flags(g);
+}
+
 static const GraphicHwOps virtio_vga_base_ops = {
+    .get_flags = virtio_vga_base_get_flags,
     .invalidate = virtio_vga_base_invalidate_display,
     .gfx_update = virtio_vga_base_update_display,
     .text_update = virtio_vga_base_text_update,
diff --git a/hw/vfio/display.c b/hw/vfio/display.c
index 42d67e8..f04473e 100644
--- a/hw/vfio/display.c
+++ b/hw/vfio/display.c
@@ -335,7 +335,13 @@ static void vfio_display_dmabuf_update(void *opaque)
     }
 }
 
+static int vfio_display_get_flags(void *opaque)
+{
+    return GRAPHIC_FLAGS_GL | GRAPHIC_FLAGS_DMABUF;
+}
+
 static const GraphicHwOps vfio_display_dmabuf_ops = {
+    .get_flags  = vfio_display_get_flags,
     .gfx_update = vfio_display_dmabuf_update,
     .ui_info    = vfio_display_edid_ui_info,
 };