BFE Engineering
42fb386f60
Replace every em dash with real punctuation (rewrites, not hyphen swaps) in docs, code comments, scripts, configs, and the port records; convert en dashes, curly quotes, ellipsis glyphs, arrows, and section signs to ASCII; drop machine-writing tell phrases from living docs. ADR titles now use a colon. The M2 bring-up DTS model string carried an em dash into the patch series and its record echoes; fixed at both, and the full series re-verified to apply cleanly onto pristine 6.18.46. One comment in freshness.h deliberately names the em dash glyph the UI renders as the unknown mark; that is data, kept as prose naming it. Verified: cargo tests (sim, config-lint, rs485-bridge), shellcheck, both driver MC/DC harnesses, patches-apply.
M4: display (VOP) port to 6.18
The RV1106 VOP is the older RV-series "lite" VOP (rockchip,rv1106-vop, VOP_VERSION
2.0xc), driven by mainline's rockchip_drm_vop.c (VOP1), not VOP2. Its sibling
rv1126 is already in mainline 6.18, so the register data is a small reuse, like
the clk/pinctrl ports.
The driver delta (rockchip_vop_reg.c)
rv1106_vop_data.c.frag: add this vop_data (reuses rv1126's common/modeset/
output/misc/intr/win sub-structs; only the version, the smaller 1280² raster, and
the VOP_FEATURE_INTERNAL_RGB feature differ), plus the match entry:
{ .compatible = "rockchip,rv1106-vop", .data = &rv1106_vop },
VOP_FEATURE_INTERNAL_RGB is essential: it is what makes vop_bind call
rockchip_rgb_init() for the parallel-RGB output (rv1126 routes through MIPI and
omits it).
The DT (in ../dts/rv1106-warden.dts)
&vopenabled + named resetsresets = <&cru SRST_H_VOP>, <&cru SRST_D_VOP>; reset-names = "ahb", "dclk";, the mainline driver requires these (the vendor node omits them; without them:vop_bind: failed to get ahb reset).&vop_out_rgbrepointed straight to the panel (mainline has no separate rgb node:rockchip_rgb_initis a helper the VOP calls).panel(panel-dpi, 720x720, 30 MHz) +pwm-backlighton&pwm1.
Verified on warden-c8a3 (2026-08-24)
CONFIG_DRM_ROCKCHIP=y + CONFIG_ROCKCHIP_VOP=y. On hardware:
rockchip-drm display-subsystem: bound ff990000.vop
[drm] Initialized rockchip 1.0.0 for display-subsystem on minor 0
/dev/dri/card0 is present and the PWM backlight is up (/sys/class/backlight,
brightness settable). The VOP driver port is validated: the register data,
version, feature, and resets are right.
RESOLVED: full UI renders on the panel (2026-08-25)
The connector and the deeper black-screen chain that followed it are fixed; the
86-Panel now draws the full WardenOS Dashboard on 6.18 (_b), verified by webcam.
The two final root causes were VOP driver bugs: rgb_dclk_pol hardcoded inverted,
and the wrong primary scanout window (rv1106 scans out via WIN1, not WIN2).
See VERIFIED.md for the complete bring-up chain, the _a-vs-_b register
diff that pinned it down, and every file changed.