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.
50 lines
2.2 KiB
Markdown
50 lines
2.2 KiB
Markdown
# M4: display (VOP) port to 6.18
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The RV1106 VOP is the older RV-series "lite" VOP (`rockchip,rv1106-vop`, VOP_VERSION
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2.0xc), driven by mainline's `rockchip_drm_vop.c` (VOP1), **not** VOP2. Its sibling
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**rv1126** is already in mainline 6.18, so the register data is a small reuse, like
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the clk/pinctrl ports.
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## The driver delta (`rockchip_vop_reg.c`)
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`rv1106_vop_data.c.frag`: add this `vop_data` (reuses rv1126's common/modeset/
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output/misc/intr/win sub-structs; only the version, the smaller 1280² raster, and
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the **`VOP_FEATURE_INTERNAL_RGB` feature** differ), plus the match entry:
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```c
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{ .compatible = "rockchip,rv1106-vop", .data = &rv1106_vop },
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```
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`VOP_FEATURE_INTERNAL_RGB` is essential: it is what makes `vop_bind` call
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`rockchip_rgb_init()` for the parallel-RGB output (rv1126 routes through MIPI and
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omits it).
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## The DT (in `../dts/rv1106-warden.dts`)
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- `&vop` enabled + **named resets** `resets = <&cru SRST_H_VOP>, <&cru SRST_D_VOP>;
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reset-names = "ahb", "dclk";`, the mainline driver requires these (the vendor
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node omits them; without them: `vop_bind: failed to get ahb reset`).
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- `&vop_out_rgb` repointed straight to the panel (mainline has no separate rgb
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node: `rockchip_rgb_init` is a helper the VOP calls).
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- `panel` (`panel-dpi`, 720x720, 30 MHz) + `pwm-backlight` on `&pwm1`.
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## Verified on warden-c8a3 (2026-08-24)
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`CONFIG_DRM_ROCKCHIP=y` + `CONFIG_ROCKCHIP_VOP=y`. On hardware:
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```
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rockchip-drm display-subsystem: bound ff990000.vop
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[drm] Initialized rockchip 1.0.0 for display-subsystem on minor 0
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```
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`/dev/dri/card0` is present and the **PWM backlight is up** (`/sys/class/backlight`,
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brightness settable). **The VOP driver port is validated**: the register data,
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version, feature, and resets are right.
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## RESOLVED: full UI renders on the panel (2026-08-25)
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The connector *and* the deeper black-screen chain that followed it are fixed; the
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86-Panel now draws the full WardenOS Dashboard on 6.18 (`_b`), verified by webcam.
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The two final root causes were VOP driver bugs: `rgb_dclk_pol` hardcoded inverted,
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and the wrong primary scanout window (rv1106 scans out via **WIN1**, not WIN2).
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See **`VERIFIED.md`** for the complete bring-up chain, the `_a`-vs-`_b` register
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diff that pinned it down, and every file changed.
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