Three fixes for the KWin DRM device discovery failure:
1. drm_scheme_ready(): replace head -c 1 with exec 3< open test.
Reading from a DRM scheme fd blocks because the scheme expects
ioctl-style request/response, not streaming reads. Use open()
success as the scheme availability probe instead.
2. ConsoleKitSession::create(): return nullptr immediately.
The D-Bus isServiceRegistered() call can block indefinitely when
the bus daemon doesn't fully implement org.freedesktop.DBus.
With both LogindSession and ConsoleKitSession returning nullptr,
Session::create() falls through to NoopSession which uses plain
open() for DRM device access.
3. Boot chain deps: redox-drm depends on driver-manager,
greeter depends on evdevd (keyboard/mouse ready before login).
Also includes: KF6 CMake build fixes, Qt6 platform patches,
libdrm Redox ioctl shim, and wayland.toml scheme check fix.
The cookbook resolves patch paths from recipe.dir which is the symlink
path (recipes/libs/libdrm/), not the physical path (local/recipes/).
Fix ../../../patches/libdrm/ → ../../../local/patches/libdrm/ to
match the convention used by kernel, base, relibc, and other recipes.
Add #ifdef __redox__ path to drmGetDeviceFromDevId() that mirrors the
working drmGetDevice2() Redox implementation. On Redox there is no
/dev/dri/ directory — DRM devices are accessed via /scheme/drm/card0.
The patch constructs a drmDevice with both PRIMARY and RENDER nodes
pointing to /scheme/drm/card0, since the redox-drm scheme serves both
roles through a single endpoint.
Also fixes drmParseSubsystemType() to return DRM_BUS_PCI on Redox.
Fix P3 patch paths (strip local/recipes/libs/libdrm/source/ prefix
from diff headers so patches apply correctly during repo fetch).
Wire P1/P2 patches into recipe.toml. Source reflects the full ioctl bridge\nrewrite: VirtGPU NR mappings, EXECBUFFER/GET_CAPS special handlers,\nPCI info bridge for drmGetDevice2, and removal of the old per-ioctl C\nhandler functions in favor of unified redox_drm_simple_ioctl() dispatch.
vasilito