The below referenced commit renames scanout_width/height to backing_width/height, but also promotes these fields in various portions of the egl interface. Meanwhile vfio dmabuf support has never used the previous scanout fields and is therefore missed in the update. This results in a black screen when transitioning from ramfb to dmabuf display when using Intel vGPU with these features.
Link: https://lists.gnu.org/archive/html/qemu-devel/2023-08/msg02726.html Fixes: 9ac06df8b684 ("virtio-gpu-udmabuf: correct naming of QemuDmaBuf size properties") Signed-off-by: Alex Williamson <alex.william...@redhat.com> --- This fixes a regression in dmabuf/EGL support for Intel GVT-g and potentially the mbochs mdev driver as well. Once validated by those that understand dmabuf/EGL integration, I'd welcome QEMU maintainers to take this directly for v8.1 or queue it as soon as possible for v8.1.1. hw/vfio/display.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/vfio/display.c b/hw/vfio/display.c index bec864f482f4..837d9e6a309e 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -243,6 +243,8 @@ static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev, dmabuf->dmabuf_id = plane.dmabuf_id; dmabuf->buf.width = plane.width; dmabuf->buf.height = plane.height; + dmabuf->buf.backing_width = plane.width; + dmabuf->buf.backing_height = plane.height; dmabuf->buf.stride = plane.stride; dmabuf->buf.fourcc = plane.drm_format; dmabuf->buf.modifier = plane.drm_format_mod; -- 2.40.1
