The feature allows the guest request an EDID blob (describing monitor capabilities) for a given scanout (aka virtual monitor connector).
It brings a new command message, which has just a scanout field (beside the standard virtio-gpu header) and a response message which carries the EDID data.
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- include/uapi/linux/virtio_gpu.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h index f43c3c6171..7267c3d2d6 100644 --- a/include/uapi/linux/virtio_gpu.h +++ b/include/uapi/linux/virtio_gpu.h @@ -41,6 +41,7 @@ #include <linux/types.h>
#define VIRTIO_GPU_F_VIRGL 0 +#define VIRTIO_GPU_F_EDID 1
enum virtio_gpu_ctrl_type { VIRTIO_GPU_UNDEFINED = 0, @@ -56,6 +57,7 @@ enum virtio_gpu_ctrl_type { VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING, VIRTIO_GPU_CMD_GET_CAPSET_INFO, VIRTIO_GPU_CMD_GET_CAPSET, + VIRTIO_GPU_CMD_GET_EDID,
/* 3d commands */ VIRTIO_GPU_CMD_CTX_CREATE = 0x0200, @@ -76,6 +78,7 @@ enum virtio_gpu_ctrl_type { VIRTIO_GPU_RESP_OK_DISPLAY_INFO, VIRTIO_GPU_RESP_OK_CAPSET_INFO, VIRTIO_GPU_RESP_OK_CAPSET, + VIRTIO_GPU_RESP_OK_EDID,
/* error responses */ VIRTIO_GPU_RESP_ERR_UNSPEC = 0x1200, @@ -291,6 +294,20 @@ struct virtio_gpu_resp_capset { __u8 capset_data[]; };
+/* VIRTIO_GPU_CMD_GET_EDID */ +struct virtio_gpu_get_edid { + struct virtio_gpu_ctrl_hdr hdr; + __le32 scanout; +}; + +/* VIRTIO_GPU_RESP_OK_EDID */ +struct virtio_gpu_resp_edid { + struct virtio_gpu_ctrl_hdr hdr; + __le32 scanout; + __le32 size; + __u8 edid[512]; +}; + #define VIRTIO_GPU_EVENT_DISPLAY (1 << 0)
struct virtio_gpu_config {