hw/display: add standalone ramfb device

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 20180613122948.18149-3-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

2 files changed, 63 insertions, 0 deletions

diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
index 0af0498..fb8408c 100644
--- a/hw/display/Makefile.objs
+++ b/hw/display/Makefile.objs
@@ -1,4 +1,5 @@
 common-obj-y += ramfb.o
+common-obj-y += ramfb-standalone.o
 
 common-obj-$(CONFIG_ADS7846) += ads7846.o
 common-obj-$(CONFIG_VGA_CIRRUS) += cirrus_vga.o
diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c
new file mode 100644
index 0000000..c0d241b
--- /dev/null
+++ b/hw/display/ramfb-standalone.c
@@ -0,0 +1,62 @@
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/loader.h"
+#include "hw/isa/isa.h"
+#include "hw/display/ramfb.h"
+#include "ui/console.h"
+#include "sysemu/sysemu.h"
+
+#define RAMFB(obj) OBJECT_CHECK(RAMFBStandaloneState, (obj), TYPE_RAMFB_DEVICE)
+
+typedef struct RAMFBStandaloneState {
+    SysBusDevice parent_obj;
+    QemuConsole *con;
+    RAMFBState *state;
+} RAMFBStandaloneState;
+
+static void display_update_wrapper(void *dev)
+{
+    RAMFBStandaloneState *ramfb = RAMFB(dev);
+
+    if (0 /* native driver active */) {
+        /* non-standalone device would run native display update here */;
+    } else {
+        ramfb_display_update(ramfb->con, ramfb->state);
+    }
+}
+
+static const GraphicHwOps wrapper_ops = {
+    .gfx_update = display_update_wrapper,
+};
+
+static void ramfb_realizefn(DeviceState *dev, Error **errp)
+{
+    RAMFBStandaloneState *ramfb = RAMFB(dev);
+
+    ramfb->con = graphic_console_init(dev, 0, &wrapper_ops, dev);
+    ramfb->state = ramfb_setup(errp);
+}
+
+static void ramfb_class_initfn(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
+    dc->realize = ramfb_realizefn;
+    dc->desc = "ram framebuffer standalone device";
+    dc->user_creatable = true;
+}
+
+static const TypeInfo ramfb_info = {
+    .name          = TYPE_RAMFB_DEVICE,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(RAMFBStandaloneState),
+    .class_init    = ramfb_class_initfn,
+};
+
+static void ramfb_register_types(void)
+{
+    type_register_static(&ramfb_info);
+}
+
+type_init(ramfb_register_types)