feat(gc570d): harden userspace VFIO receiver, modularize IT68051 EDID programmer, and update udev rules

tools/everlive/everlive_viewer.py

@@ -1595,22 +1595,6 @@ def _start_vfio_duo(self, fullscreen: bool, vsync: bool,
         if self.hw_info.get("pci"):
             cmd.append(self.hw_info["pci"])
 
-        # lsfg-vk frame generation.  This is deliberately passed
-        # in headless mode too: the engine keeps LSFG idle while the window is
-        # closed and activates Vulkan + LSFG as soon as mode.set("gaming")
-        # opens it, so a Studio -> Gaming switch needs no restart.  The V4L2
-        # loopback keeps receiving the raw capture path independently.
-        if framegen not in FRAMEGEN_KEYS:
-            framegen = FRAMEGEN_ALIASES.get(str(framegen).lower(), "off")
-        if framegen in FRAMEGEN_KEYS and framegen != "off":
-            cmd.extend(["--framegen", framegen])
-        # Flow/perf/latency are passed even in mode OFF so a later live toggle
-        # (hotkey or IPC) starts from the Hub's saved values, not defaults.
-        cmd.extend(["--fg-flow-scale",
-                    f"{max(0.5, min(1.0, float(fg_flow_scale))):.2f}"])
-        cmd.append("--fg-perf" if fg_perf_mode else "--no-fg-perf")
-        cmd.append("--fg-low-latency" if fg_low_latency else "--no-fg-low-latency")
-
         if headless:
             cmd.append("--headless")
             # Studio/streamer mode publishes a clean OBS feed without OSD.
@@ -1803,6 +1787,23 @@ def _start_vfio(self, fullscreen: bool = False, vsync: bool = False,
         cmd.extend(["--scale", scale])
         cmd.extend(["--volume", f"{volume:.2f}"])
 
+        # lsfg-vk frame generation.  Passed in headless mode too: the engine
+        # keeps LSFG idle while the window is closed and activates Vulkan +
+        # LSFG as soon as mode.set("gaming") opens it, so a Studio -> Gaming
+        # switch needs no restart.  The V4L2 loopback keeps receiving the 
+        # raw capture path independently.  The GC570D engine has no 
+        # LSFG path; those flags stay on this GC573 command line only.
+        if framegen not in FRAMEGEN_KEYS:
+            framegen = FRAMEGEN_ALIASES.get(str(framegen).lower(), "off")
+        if framegen in FRAMEGEN_KEYS and framegen != "off":
+            cmd.extend(["--framegen", framegen])
+        # Flow/perf/latency are passed even in mode OFF so a later live toggle
+        # (hotkey or IPC) starts from the Hub's saved values, not defaults.
+        cmd.extend(["--fg-flow-scale",
+                    f"{max(0.5, min(1.0, float(fg_flow_scale))):.2f}"])
+        cmd.append("--fg-perf" if fg_perf_mode else "--no-fg-perf")
+        cmd.append("--fg-low-latency" if fg_low_latency else "--no-fg-low-latency")
+
         if v4l2_device:
             cmd.extend(["--v4l2", v4l2_device])
         if audio_tap:

tools/opengc570d-userd/99-gc570d-vfio.rules

@@ -1,5 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 # Bind AVerMedia GC570D (1461:0054) to signed stock vfio-pci and grant seat/video access
 ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x1461", ATTR{device}=="0x0054", RUN+="/usr/local/libexec/gc570d-vfio-bind.sh"
+# /dev/vfio/vfio is the shared control node; scope only the group nodes to
+# AVerMedia PCI IDs so other VFIO assignments keep their own policy.
 SUBSYSTEM=="vfio", KERNEL=="vfio", GROUP="video", MODE="0660", TAG+="uaccess"
-SUBSYSTEM=="vfio", KERNEL=="[0-9]*", GROUP="video", MODE="0660", TAG+="uaccess"
+SUBSYSTEM=="vfio", KERNEL=="[0-9]*", ATTRS{vendor}=="0x1461", ATTRS{device}=="0x0054", GROUP="video", MODE="0660", TAG+="uaccess"
+SUBSYSTEM=="vfio", KERNEL=="[0-9]*", ATTRS{vendor}=="0x1461", ATTRS{device}=="0x0055", GROUP="video", MODE="0660", TAG+="uaccess"