The Redox EGL platform (platform_redox.c) was removed in upstream
Mesa ~25.0, but the existing local/patches/mesa/03-platform-redox-gpu-probe.patch
still targets it — the patch fails because the file is missing.
This commit adds a documentation patch (26.1.4-defer-redox-platform.patch)
that:
- Acknowledges the orphaned state of patches 03/06
- Speaks the truth about the Mesa build state
- Defers Phase 3 to a follow-up requiring ~3-4 weeks plus QEMU validation
The proper Phase 3 implementation must re-create platform_redox.c for
Mesa 26.1.4 (the original was Mesa 24.0 or earlier; the DRI2 API has
shifted since — dri2_egl_display_unreference_image, kopper interface,
image extension semantics all need re-derivation from upstream).
Until Phase 3 lands, EGL_PLATFORM=redox will not resolve. The
plan-trackable runtime entry path is EGL_PLATFORM=wayland +
MESA_LOADER_DRIVER_OVERRIDE=virgl, and even then only llvmpipe
will be available — virgl requires the redox EGL platform to
auto-select the right DRI driver.
A standalone platform_redox.c build was attempted in-session; it
had correct structure but the Mesa 26.1.4 DRI2 API surface
(internal struct field names, helper function signatures) requires
re-derivation from the upstream RedoxOS Mesa 24.0 fork. That
re-derivation is deferred.
vasilito
25037b42c8