From 6c5abb68c79d4acf71112b5ba4924a5af2d1e5c9 Mon Sep 17 00:00:00 2001 From: Lepton Wu Date: Thu, 5 Apr 2018 12:38:48 -0700 Subject: [PATCH] virgl: disable virgl when no 3D for virtio gpu. If users are running mesa under old version of qemu or have turned off GL at runtime, virtio gpu driver actually doesn't work. Adds a detection here so mesa can fall back to software rendering. v2: - move detection from loader to virgl (Ilia, Emil) Signed-off-by: Lepton Wu Reviewed-by: Dave Airlie --- src/gallium/winsys/virgl/drm/virgl_drm_winsys.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c index cf3c3bac4b4..4198ed7feb3 100644 --- a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c +++ b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c @@ -800,8 +800,15 @@ virgl_drm_winsys_create(int drmFD) { struct virgl_drm_winsys *qdws; int ret; + int gl = 0; struct drm_virtgpu_getparam getparam = {0}; + getparam.param = VIRTGPU_PARAM_3D_FEATURES; + getparam.value = (uint64_t)(uintptr_t)≷ + ret = drmIoctl(drmFD, DRM_IOCTL_VIRTGPU_GETPARAM, &getparam); + if (ret < 0 || !gl) + return NULL; + qdws = CALLOC_STRUCT(virgl_drm_winsys); if (!qdws) return NULL; @@ -914,6 +921,10 @@ virgl_drm_screen_create(int fd) int dup_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); vws = virgl_drm_winsys_create(dup_fd); + if (!vws) { + close(dup_fd); + goto unlock; + } pscreen = virgl_create_screen(vws); if (pscreen) { -- 2.30.2