On Wed, 16 Aug 2023 15:08:10 -0600
Alex Williamson <alex.william...@redhat.com> wrote:
> > diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
> > index 8f9fbf583e..3d19dbe382 100644
> > --- a/ui/egl-helpers.c
> > +++ b/ui/egl-helpers.c
> > @@ -314,9 +314,9 @@ void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
> > }
> >
> > attrs[i++] = EGL_WIDTH;
> > - attrs[i++] = dmabuf->width;
> > + attrs[i++] = dmabuf->backing_width;
> > attrs[i++] = EGL_HEIGHT;
> > - attrs[i++] = dmabuf->height;
> > + attrs[i++] = dmabuf->backing_height;
> > attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
> > attrs[i++] = dmabuf->fourcc;
> >
> > diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
> > index 42db1bb6cf..eee821d73a 100644
> > --- a/ui/gtk-egl.c
> > +++ b/ui/gtk-egl.c
> > @@ -262,9 +262,10 @@ void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
> > }
> >
> > gd_egl_scanout_texture(dcl, dmabuf->texture,
> > - dmabuf->y0_top, dmabuf->width, dmabuf->height,
> > - dmabuf->x, dmabuf->y, dmabuf->scanout_width,
> > - dmabuf->scanout_height, NULL);
> > + dmabuf->y0_top,
> > + dmabuf->backing_width, dmabuf->backing_height,
> > + dmabuf->x, dmabuf->y, dmabuf->width,
> > + dmabuf->height, NULL);
> >
> > if (dmabuf->allow_fences) {
> > vc->gfx.guest_fb.dmabuf = dmabuf;
> > @@ -284,7 +285,8 @@ void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
> > if (!dmabuf->texture) {
> > return;
> > }
> > - egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width,
> > dmabuf->height,
> > + egl_fb_setup_for_tex(&vc->gfx.cursor_fb,
> > + dmabuf->backing_width, dmabuf->backing_height,
> > dmabuf->texture, false);
> > } else {
> > egl_fb_destroy(&vc->gfx.cursor_fb);
> > diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
> > index a9a7fdf50c..4513d3d059 100644
> > --- a/ui/gtk-gl-area.c
> > +++ b/ui/gtk-gl-area.c
> > @@ -301,9 +301,10 @@ void gd_gl_area_scanout_dmabuf(DisplayChangeListener
> > *dcl,
> > }
> >
> > gd_gl_area_scanout_texture(dcl, dmabuf->texture,
> > - dmabuf->y0_top, dmabuf->width,
> > dmabuf->height,
> > - dmabuf->x, dmabuf->y, dmabuf->scanout_width,
> > - dmabuf->scanout_height, NULL);
> > + dmabuf->y0_top,
> > + dmabuf->backing_width,
> > dmabuf->backing_height,
> > + dmabuf->x, dmabuf->y, dmabuf->width,
> > + dmabuf->height, NULL);
> >
> > if (dmabuf->allow_fences) {
> > vc->gfx.guest_fb.dmabuf = dmabuf;
>
I suspect the issues is in these last few chunks where width and height
are replaced with backing_width and backing height, but
hw/vfio/display.c never sets backing_*. It appears that the following
resolves the issue:
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;
I'll post that formally, but I really have no idea how dmabuf display
works, so confirmation would be appreciated. Thanks,
Alex
