drivers/virtio: add virtio gpu driver

This patch provides basic framebuffer display support for virtio.
Multiple displays are supported.

Signed-off-by: Peter Bee <bijunda1@xiaomi.com>

drivers/virtio/Kconfig

@@ -27,6 +27,12 @@ config DRIVERS_VIRTIO_BLK
 	depends on !DISABLE_MOUNTPOINT
 	default n
 
+config DRIVERS_VIRTIO_GPU
+	bool "Virtio gpu support"
+	default n
+	depends on VIDEO_FB
+	select FB_UPDATE
+
 config DRIVERS_VIRTIO_NET
 	bool "Virtio network support"
 	depends on NETDEVICES

drivers/virtio/Make.defs

@@ -32,6 +32,10 @@ ifeq ($(CONFIG_DRIVERS_VIRTIO_BLK),y)
   CSRCS += virtio-blk.c
 endif
 
+ifeq ($(CONFIG_DRIVERS_VIRTIO_GPU),y)
+  CSRCS += virtio-gpu.c
+endif
+
 ifeq ($(CONFIG_DRIVERS_VIRTIO_NET),y)
   CSRCS += virtio-net.c
 endif

drivers/virtio/virtio.c

@@ -29,6 +29,7 @@
 #include <nuttx/virtio/virtio.h>
 
 #include "virtio-blk.h"
+#include "virtio-gpu.h"
 #include "virtio-net.h"
 #include "virtio-rng.h"
 #include "virtio-serial.h"
@@ -125,6 +126,14 @@ void virtio_register_drivers(void)
     }
 #endif
 
+#ifdef CONFIG_DRIVERS_VIRTIO_GPU
+  ret = virtio_register_gpu_driver();
+  if (ret < 0)
+    {
+      vrterr("virtio_register_gpu_driver failed, ret=%d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_DRIVERS_VIRTIO_NET
   ret = virtio_register_net_driver();
   if (ret < 0)