From f6b14216c173a3f65a8deefa4e387524ece8ef0e Mon Sep 17 00:00:00 2001
From: vhaudiquet <vhaudiquet@localhost>
Date: Sun, 30 Aug 2026 20:07:48 +0200
Subject: [PATCH] Round 35: keyboard VERIFIED; console rotated to landscape
 (rot=1); payload 4fcd863d

---
 RESEARCH.md | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/RESEARCH.md b/RESEARCH.md
index 3e9602a..486f612 100644
--- a/RESEARCH.md
+++ b/RESEARCH.md
@@ -1341,3 +1341,46 @@ Flashed `9c55f520…`, cmp OK, vbutil body verification succeeded.
 | `No USB controllers found` again | binding still failing — next step: krane_fb_log in lists_bind_fdt path |
 
 Awaiting user reboot report.
+
+## Round 35 — Round 34 VERIFIED (keyboard works); console rotated to landscape
+
+User confirmed: USB scans properly and the pogo keyboard works at the
+prompt — Milestone 4 step 1 done (payload `9c55f520…` verified live).
+Milestone 3+4a: banner + prompt + keyboard input on the panel.
+
+### Rotation request: portrait console → landscape
+
+Panel is the BOE TV101WUM-NL6, natively 1200×1920 portrait. Upstream
+DT marks the panel node `rotation = <270>` (mounted rotated in the
+chassis); pmOS/ChromeOS force landscape with the keyboard attached.
+
+Mainline already supports this without touching the scanout path:
+`CONFIG_CONSOLE_ROTATION` builds the rotated text drivers
+vidconsole1/2/3 (drivers/video/console_rotate.c); when the video
+driver sets `priv->rot`, video-uclass binds `vidconsole<rot>` and the
+rotated console swaps geometry itself (console_core.c: rot%2 ⇒
+cols = ysize/8 = 240, rows = xsize/16 = 75). The first vidconsole's
+stdio name is still "vidconsole", so krane.env needs no change.
+
+### Change (u-boot `69787732`, payload `4fcd863d…`)
+
+- mt8183_scanout probe: `uc_priv->rot = 1` (90° clockwise) with a
+  comment explaining the 270° panel mount. Guess between rot=1 and
+  rot=3 (both landscape-upright; they differ by which side the
+  keyboard hinge ends up on): first try rot=1, flip to 3 if the user
+  reports upside-down text.
+- defconfig: CONFIG_CONSOLE_ROTATION=y (CONSOLE_NORMAL stays; the
+  uclass picks the driver from rot).
+- fb geometry, LBIO parse, revive path untouched. Build OK, `_start`
+  still 0x4C001000. Flashed `4fcd863d…`, cmp OK, vbutil body
+  verification succeeded.
+
+### Decision tree for the reboot
+
+| observation | meaning |
+|---|---|
+| banner + prompt readable in landscape with keyboard; keys work | DONE |
+| landscape but text upside down | switch rot=1 → rot=3 in mt8183_scanout.c |
+| still portrait | vidconsole1 not bound — check CONSOLE_ROTATION made it into the build |
+
+Awaiting user reboot report.