scripts: fold stg.sh into st.sh via a -d (display) flag

doc/source/build_system.rst

@@ -71,8 +71,8 @@ Everything is anchored on the repository root. Source ``env.sh`` once per shell:
 
 This exports ``IB_ROOT_DIR``, sets ``BBPATH``/``BUILDDIR`` to ``build/``, and
 prepends ``scripts/`` and the bundled ``bitbake`` to ``PATH`` so the active tree
-wins. From then on the ``build.sh`` / ``deploy.sh`` / ``st.sh`` / ``stg.sh``
-commands are on the path. See :ref:`user_guide` for the end-to-end walkthrough.
+wins. From then on the ``build.sh`` / ``deploy.sh`` / ``st.sh`` commands are on
+the path. See :ref:`user_guide` for the end-to-end walkthrough.
 
 Meta-layers
 ===========

doc/source/display_input.rst

@@ -143,25 +143,23 @@ it once per refresh through the ``GET_STATE`` ioctl, and the driver scales the r
 relative PL050 mouse (``kmi1.c``) is kept in the tree but its dts node is
 ``status = "disabled"`` so there is a single ``/dev/mouse``.
 
-The host GTK window (``stg.sh``)
-================================
+The host GTK window (``st.sh -d``)
+==================================
 
-The graphical launcher ``stg.sh`` starts QEMU with the **GTK** display
-backend (``-display gtk,zoom-to-fit=off``):
+By default ``st.sh`` is headless (``-display none``): no window, serial console
+only, used for non-graphical work and CI. Pass **-d** to open the QEMU **GTK**
+window that presents the guest PL111 CLCD (``-display gtk,zoom-to-fit=off``):
 
 * **GTK, not SDL** — the SDL backend does not present the PL111 console surface
   (the window stays black even though the framebuffer is rendered correctly);
   GTK shows it, and its *View* menu lists every console.
-* **XWayland for HiDPI** — ``stg.sh`` exports ``GDK_BACKEND=x11`` (plus
-  ``GDK_SCALE=1``). On a fractionally-scaled HiDPI **Wayland** panel, GTK reports
-  pointer coordinates in a different scale than the framebuffer surface, so the
-  absolute mapping comes out *offset* (host and guest cursors shifted) — fine on a
-  1× external monitor, wrong on the laptop panel. Routing GTK through XWayland
-  gives a uniform pointer-to-surface mapping, so the cursors coincide on every
-  monitor. It is harmless on a native X11 session.
-
-``st.sh`` is the headless sibling (``-display none``): no window, console
-only, used for non-graphical work and CI.
+* **XWayland for HiDPI** — with ``-d``, ``st.sh`` exports ``GDK_BACKEND=x11``
+  (plus ``GDK_SCALE=1``). On a fractionally-scaled HiDPI **Wayland** panel, GTK
+  reports pointer coordinates in a different scale than the framebuffer surface,
+  so the absolute mapping comes out *offset* (host and guest cursors shifted) —
+  fine on a 1× external monitor, wrong on the laptop panel. Routing GTK through
+  XWayland gives a uniform pointer-to-surface mapping, so the cursors coincide on
+  every monitor. It is harmless on a native X11 session.
 
 .. _console_sigint:
 

doc/source/img/gen_so3_diagrams.py

@@ -348,7 +348,7 @@ def xml(self):
 dep = p.box(420, 420, 250, 64,
             "scripts/deploy.sh bsp-so3\n→ sdcard FAT  (+ flash0.img)", WHITE, 10)
 run = p.box(770, 420, 270, 64,
-            "scripts/st.sh  /  stg.sh\n→ QEMU (EL1 / EL2 / ATF)", WHITE, 10)
+            "scripts/st.sh  [-d]\n→ QEMU (EL1 / EL2 / ATF)", WHITE, 10)
 # the band feeds do_itb: drop from the band's lower-left border straight down.
 p.edge(rec, itb, "", ARR + "exitX=0.15;exitY=1;entryX=0.5;entryY=0;")
 p.edge(itb, dep, "", ARR + "exitX=1;exitY=0.5;entryX=0;entryY=0.5;")
@@ -379,7 +379,7 @@ def xml(self):
 qmsd = p.box(430, 320, 280, 44, "pl050 mouse @ 0x08802000  (disabled)", NONE, 9)
 quart= p.box(430, 380, 280, 46, "pl011 UART @ 0x09000000  (SPI 1)", HW, 9)
 # Host column
-p.box(780, 60, 300, 470, "Host  (scripts/stg.sh)", CONT, 12, 1)
+p.box(780, 60, 300, 470, "Host  (scripts/st.sh -d)", CONT, 12, 1)
 hwin = p.box(810, 110, 240, 80, "GTK window\n-display gtk,zoom-to-fit=off\nGDK_BACKEND=x11 (HiDPI/Wayland)", NEUTRAL, 9)
 hptr = p.box(810, 250, 240, 64, "host pointer → absolute\n1:1 mapping, no grab / no warp", NEUTRAL, 9)
 hterm= p.box(810, 380, 240, 46, "terminal (-serial mon:stdio)", NEUTRAL, 9)

doc/source/lvgl.rst

@@ -83,12 +83,12 @@ Running LVGL under QEMU
 =======================
 
 Build the user space with the LVGL applications and a framebuffer-enabled kernel
-configuration, then launch the **graphical** emulator (the framebuffer needs a
-real window):
+configuration, then launch the emulator in **graphical** mode with ``-d`` (the
+framebuffer needs a real window):
 
 .. code-block:: bash
 
-   stg.sh
+   st.sh -d
 
 QEMU opens a GTK window that shows the PL111 framebuffer; launch an LVGL
 application from the ``so3%`` prompt to draw into it, for example::

doc/source/user_guide.rst

@@ -34,7 +34,7 @@ The most relevant top-level directories are::
 
    so3/          # the SO3 kernel (so3/so3) and user space (so3/usr), plus dts
    build/        # the Infrabase build: meta-* layers, conf/local.conf, bitbake work tree
-   scripts/      # build.sh, deploy.sh, st.sh, stg.sh, updiff.sh, …
+   scripts/      # build.sh, deploy.sh, st.sh, updiff.sh, …
    filesystem/   # the virtual SD-card image used by QEMU
    u-boot/       # fetched U-Boot (patched)
    qemu/         # fetched QEMU (patched) -> qemu/build/qemu-system-*
@@ -105,12 +105,12 @@ Launch scripts
    :header-rows: 1
    :widths: 16 84
 
-   * - Script
+   * - Command
      - Use
    * - ``st.sh``
      - **headless** run (``-display none``) — serial console only. The default for
        non-graphical work and CI.
-   * - ``stg.sh``
+   * - ``st.sh -d``
      - **graphical** run — a GTK window for the PL111 framebuffer (LVGL, ``fb_test``).
        See :ref:`display_input`.
 

docker/scripts/run.sh

@@ -40,8 +40,8 @@ fi
 
 # This launcher boots a STANDALONE SO3 image at EL1 (plain -M virt). It cannot
 # boot an AVZ (EL2 hypervisor) or an ATF/flash0 (EL3) deployment — those need
-# QEMU started with virtualization=on / secure=on, which scripts/st.sh and
-# scripts/stg.sh select from the deployed ITS. The lv_perf images deploy a
+# QEMU started with virtualization=on / secure=on, which scripts/st.sh selects
+# from the deployed ITS. The lv_perf images deploy a
 # standalone ITS, so this guard only ever trips when run by hand on a host tree
 # configured for AVZ/ATF.
 SO3_ITS=$(grep -E "^IB_TARGET_ITS:so3:${PLATFORM}\b" build/conf/local.conf 2>/dev/null \
@@ -55,7 +55,7 @@ if [ -n "$why" ]; then
     echo "Error: the deployment is not standalone — $why." >&2
     echo "       run.sh boots SO3 standalone at EL1 only. For an AVZ (EL2) or ATF" >&2
     echo "       (EL3) build, use the host launchers instead, which select the EL" >&2
-    echo "       from the ITS:  scripts/st.sh  (headless)  /  scripts/stg.sh  (GTK)." >&2
+    echo "       from the ITS:  scripts/st.sh  (headless)  /  scripts/st.sh -d  (GTK)." >&2
     exit 1
 fi
 

scripts/st.sh

@@ -12,6 +12,23 @@
 
 QEMU_AUDIO_DRV="none"
 GDB_PORT_BASE=1234
+
+# Parse our own options (currently just -d) out of the argument list before
+# what's left is forwarded to QEMU as USR_OPTION.
+WITH_DISPLAY=0
+POSARGS=()
+for _a in "$@"; do
+    case "$_a" in
+        -d) WITH_DISPLAY=1 ;;
+        -h|--help)
+            echo "Usage: $(basename "$0") [-d] [qemu-option]"
+            echo "  -d   graphical: open the QEMU GTK window showing the guest PL111/LVGL screen"
+            echo "       (default: headless, serial console only)"
+            exit 0 ;;
+        *)  POSARGS+=("$_a") ;;
+    esac
+done
+set -- "${POSARGS[@]}"
 USR_OPTION=$1
 # QEMU_BIN is selected per IB_PLATFORM below (qemu-system-aarch64 for
 # virt64, qemu-system-arm for virt32).
@@ -46,6 +63,24 @@ launch_qemu() {
     SO3_ITS=$(grep -E "^IB_TARGET_ITS:so3:${IB_PLATFORM}\b" build/conf/local.conf | awk -F'"' '{print $2}' | tail -1)
     LINUX_ITS=$(grep -E "^IB_TARGET_ITS:linux:${IB_PLATFORM}\b" build/conf/local.conf | awk -F'"' '{print $2}' | tail -1)
 
+    # Display mode. Default: headless (serial console only, -display none). With
+    # -d: open the QEMU GTK window that presents the guest PL111 CLCD (the LVGL
+    # screen). SO3 drives PL111 + PL050 (wired unconditionally into '-M virt' by
+    # the so3 QEMU patch) and has no virtio-gpu, so no extra device flags are
+    # needed — just switch the display backend. Use GTK, not SDL: SDL leaves the
+    # PL111 console black, GTK presents it (and its View menu lists every
+    # console). On a fractionally-scaled HiDPI Wayland panel, route GTK through
+    # XWayland (GDK_BACKEND=x11) so the so3,absmouse absolute pointer maps 1:1
+    # onto the guest surface; harmless on a real X11 session.
+    if [ "$WITH_DISPLAY" == "1" ]; then
+        DISPLAY_OPT="-display gtk,zoom-to-fit=off"
+        export GDK_BACKEND=x11
+        export GDK_SCALE=1
+        export GDK_DPI_SCALE=1
+    else
+        DISPLAY_OPT="-display none"
+    fi
+
     if [ "$IB_PLATFORM" == "virt64" ]; then
     QEMU_BIN="$IB_ROOT_DIR/qemu/build/qemu-system-aarch64"
     echo Starting on virt64
@@ -97,7 +132,7 @@ launch_qemu() {
 		-device virtio-blk-device,drive=hd0 \
 		-drive if=none,file=filesystem/sdcard.img.virt64,id=hd0,format=raw,file.locking=off \
 		-m 1024 \
-		-display none \
+		${DISPLAY_OPT} \
 		-netdev user,id=n1,hostfwd=tcp::2222-:22 \
 		-device virtio-net-device,netdev=n1,mac=${QEMU_MAC_ADDR} \
         	-gdb tcp::${GDB_PORT}
@@ -120,7 +155,7 @@ launch_qemu() {
 		-device virtio-blk-device,drive=hd0 \
 		-drive if=none,file=filesystem/sdcard.img.virt32,id=hd0,format=raw,file.locking=off \
 		-m 1024 \
-		-display none \
+		${DISPLAY_OPT} \
 		-netdev user,id=n1,hostfwd=tcp::2222-:22 \
 		-device virtio-net-device,netdev=n1,mac=${QEMU_MAC_ADDR} \
         	-gdb tcp::${GDB_PORT}