[PATCH 10/12] vhost-user-video: add dev_type to CLI

[Albert Esteve]

Add dev_type to the command line interface.
This way we can select dev_type=encoder or
dev_type=decoder and assign the virtio ID
appropiately. If ommited, default virtio
ID used is decoder's ID.

Example:
-device vhost-user-video-pci,chardev=video,dev_type=encoder,id=video

Signed-off-by: Albert Esteve <aesteve@redhat.com>
---
 docs/system/devices/vhost-user-video.rst |  2 +-
 hw/display/vhost-user-video.c            | 13 +++++++++++--
 include/hw/virtio/vhost-user-video.h     |  1 +
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/docs/system/devices/vhost-user-video.rst 
b/docs/system/devices/vhost-user-video.rst
index ff0a8fe5c7..d428a773e2 100644
--- a/docs/system/devices/vhost-user-video.rst
+++ b/docs/system/devices/vhost-user-video.rst
@@ -72,7 +72,7 @@ use to communicate as well as share the guests memory over a 
memfd.
 ::
 
     host# qemu-system                                                          
\
-        -device vhost-user-video-pci,chardev=video,id=video                    
 \
+        -device vhost-user-video-pci,chardev=video,dev_type=decoder,id=video   
 \
         -chardev socket,path=/tmp//video.sock,id=video                         
 \
         -m 4096                                                                
\
         -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on  
\
diff --git a/hw/display/vhost-user-video.c b/hw/display/vhost-user-video.c
index 9cc6a717d5..469e9e7c89 100644
--- a/hw/display/vhost-user-video.c
+++ b/hw/display/vhost-user-video.c
@@ -300,8 +300,16 @@ static void vhost_user_video_device_realize(DeviceState 
*dev, Error **errp)
         return;
     }
 
-    /* TODO Implement VIDEO_ENC, currently only support VIDEO_DEC */
-    virtio_init(vdev, VIRTIO_ID_VIDEO_DECODER, sizeof(struct 
virtio_video_config));
+    if (video->conf.type == NULL || !strcmp(video->conf.type, "decoder")) {
+        virtio_init(vdev, VIRTIO_ID_VIDEO_DECODER,
+                    sizeof(struct virtio_video_config));
+    } else if (!strcmp(video->conf.type, "encoder")) {
+        virtio_init(vdev, VIRTIO_ID_VIDEO_ENCODER,
+                    sizeof(struct virtio_video_config));
+    } else {
+        error_report("invalid type received: %s", video->conf.type);
+        goto vhost_dev_init_failed;
+    }
 
     /* one command queue and one event queue */
     video->vhost_dev.nvqs = 2;
@@ -375,6 +383,7 @@ static const VMStateDescription vhost_user_video_vmstate = {
 
 static Property vhost_user_video_properties[] = {
     DEFINE_PROP_CHR("chardev", VHostUserVIDEO, conf.chardev),
+    DEFINE_PROP_STRING("dev_type", VHostUserVIDEO, conf.type),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/include/hw/virtio/vhost-user-video.h 
b/include/hw/virtio/vhost-user-video.h
index f8329c3b36..3fe00b79a6 100644
--- a/include/hw/virtio/vhost-user-video.h
+++ b/include/hw/virtio/vhost-user-video.h
@@ -22,6 +22,7 @@
 
 typedef struct {
     CharBackend chardev;
+    char *type;
     struct virtio_video_config config;
 } VHostUserVIDEOConf;
 
-- 
2.39.2