Commit 5519dd1bac for qemu.org
commit 5519dd1bacd7272cfb51f535efaeeefeb2e4a245
Author: Marc-André Lureau <marcandre.lureau@redhat.com>
Date: Fri Aug 28 16:43:52 2026 +0400
ui/gtk: move draw_submitted from QemuDmaBuf to VirtualGfxConsole
The draw_submitted flag on QemuDmaBuf is only used by the GTK display
backend to gate the draw pipeline and prevent gl_block refcount
imbalance when the guest submits frames faster than GTK draws them. It
is not an intrinsic property of the DMA-BUF but transient display
listener state.
Move it to VirtualGfxConsole, replacing the getter/setter calls with
direct struct member access. Reset the flag when the active dmabuf is
released in gd_gl_release_dmabuf().
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
diff --git a/include/ui/dmabuf.h b/include/ui/dmabuf.h
index 381583bd53..b972099859 100644
--- a/include/ui/dmabuf.h
+++ b/include/ui/dmabuf.h
@@ -42,8 +42,6 @@ uint32_t qemu_dmabuf_get_backing_width(QemuDmaBuf *dmabuf);
uint32_t qemu_dmabuf_get_backing_height(QemuDmaBuf *dmabuf);
bool qemu_dmabuf_get_y0_top(QemuDmaBuf *dmabuf);
bool qemu_dmabuf_get_allow_fences(QemuDmaBuf *dmabuf);
-bool qemu_dmabuf_get_draw_submitted(QemuDmaBuf *dmabuf);
void qemu_dmabuf_set_texture(QemuDmaBuf *dmabuf, uint32_t texture);
-void qemu_dmabuf_set_draw_submitted(QemuDmaBuf *dmabuf, bool draw_submitted);
#endif
diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index 4b4ef50e37..b66b9ca5c5 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -59,6 +59,7 @@ typedef struct VirtualGfxConsole {
bool scanout_mode;
bool has_dmabuf;
int gl_fence_fd;
+ bool draw_submitted;
#endif
} VirtualGfxConsole;
diff --git a/ui/dmabuf.c b/ui/dmabuf.c
index b61dc7ad27..495270f29b 100644
--- a/ui/dmabuf.c
+++ b/ui/dmabuf.c
@@ -26,7 +26,6 @@ struct QemuDmaBuf {
uint32_t backing_height;
bool y0_top;
bool allow_fences;
- bool draw_submitted;
};
QemuDmaBuf *qemu_dmabuf_new(uint32_t width, uint32_t height,
@@ -212,21 +211,8 @@ bool qemu_dmabuf_get_allow_fences(QemuDmaBuf *dmabuf)
return dmabuf->allow_fences;
}
-bool qemu_dmabuf_get_draw_submitted(QemuDmaBuf *dmabuf)
-{
- assert(dmabuf != NULL);
-
- return dmabuf->draw_submitted;
-}
-
void qemu_dmabuf_set_texture(QemuDmaBuf *dmabuf, uint32_t texture)
{
assert(dmabuf != NULL);
dmabuf->texture = texture;
}
-
-void qemu_dmabuf_set_draw_submitted(QemuDmaBuf *dmabuf, bool draw_submitted)
-{
- assert(dmabuf != NULL);
- dmabuf->draw_submitted = draw_submitted;
-}
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index c671aabd11..8623181336 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -86,10 +86,10 @@ void gd_egl_draw(VirtualConsole *vc)
if (vc->gfx.scanout_mode) {
#ifdef CONFIG_GBM
if (dmabuf) {
- if (!qemu_dmabuf_get_draw_submitted(dmabuf)) {
+ if (!vc->gfx.draw_submitted) {
return;
} else {
- qemu_dmabuf_set_draw_submitted(dmabuf, false);
+ vc->gfx.draw_submitted = false;
}
qemu_console_hw_gl_block(vc->gfx.dcl.con, true);
}
@@ -169,8 +169,7 @@ void gd_egl_refresh(DisplayChangeListener *dcl)
#endif
}
- if (vc->gfx.guest_fb.dmabuf &&
- qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
+ if (vc->gfx.guest_fb.dmabuf && vc->gfx.draw_submitted) {
gd_egl_draw(vc);
return;
}
@@ -290,6 +289,7 @@ void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
if (qemu_dmabuf_get_allow_fences(dmabuf)) {
vc->gfx.guest_fb.dmabuf = dmabuf;
+ vc->gfx.draw_submitted = false;
}
#endif
}
@@ -406,9 +406,8 @@ void gd_egl_flush(DisplayChangeListener *dcl,
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
GtkWidget *area = vc->gfx.drawing_area;
- if (vc->gfx.guest_fb.dmabuf &&
- !qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
- qemu_dmabuf_set_draw_submitted(vc->gfx.guest_fb.dmabuf, true);
+ if (vc->gfx.guest_fb.dmabuf && !vc->gfx.draw_submitted) {
+ vc->gfx.draw_submitted = true;
gtk_egl_set_scanout_mode(vc, true);
}
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 29d1b1e411..45c0c8c81a 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -82,10 +82,10 @@ void gd_gl_area_draw(VirtualConsole *vc)
#ifdef CONFIG_GBM
if (dmabuf) {
- if (!qemu_dmabuf_get_draw_submitted(dmabuf)) {
+ if (!vc->gfx.draw_submitted) {
return;
} else {
- qemu_dmabuf_set_draw_submitted(dmabuf, false);
+ vc->gfx.draw_submitted = false;
}
qemu_console_hw_gl_block(vc->gfx.dcl.con, true);
}
@@ -319,9 +319,8 @@ void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
- if (vc->gfx.guest_fb.dmabuf &&
- !qemu_dmabuf_get_draw_submitted(vc->gfx.guest_fb.dmabuf)) {
- qemu_dmabuf_set_draw_submitted(vc->gfx.guest_fb.dmabuf, true);
+ if (vc->gfx.guest_fb.dmabuf && !vc->gfx.draw_submitted) {
+ vc->gfx.draw_submitted = true;
gtk_gl_area_set_scanout_mode(vc, true);
}
gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
@@ -356,6 +355,7 @@ void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
if (qemu_dmabuf_get_allow_fences(dmabuf)) {
vc->gfx.guest_fb.dmabuf = dmabuf;
+ vc->gfx.draw_submitted = false;
}
#endif
}
diff --git a/ui/gtk.c b/ui/gtk.c
index 1c75b9ea3c..55e45e8445 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -593,6 +593,7 @@ static void gd_gl_release_dmabuf(DisplayChangeListener *dcl,
egl_dmabuf_release_texture(dmabuf);
if (vc->gfx.guest_fb.dmabuf == dmabuf) {
vc->gfx.guest_fb.dmabuf = NULL;
+ vc->gfx.draw_submitted = false;
}
#endif
}