commit c6806fdcc88b76341141b44c98e653a0ef9f033c
Author: Tim Evans <timevans666@gmail.com>
Date:   Wed Jun 24 21:51:20 2026 +0100

    Initial dotfiles for GPD Pocket 3
    
    Tracks auto-rotation daemon, display scale, touch/pen calibration,
    libwacom entry, and system udev/xorg configs for DSI-1 panel setup.
    
    Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

diff --git a/.config/autostart/auto-rotate.desktop b/.config/autostart/auto-rotate.desktop
new file mode 100644
index 0000000..1641aca
--- /dev/null
+++ b/.config/autostart/auto-rotate.desktop
@@ -0,0 +1,8 @@
+[Desktop Entry]
+Type=Application
+Name=Auto Rotate
+Comment=Screen auto-rotation for GPD Pocket 3 using accelerometer
+Exec=/home/tim-evans/.local/bin/auto-rotate
+Hidden=false
+NoDisplay=false
+X-GNOME-Autostart-enabled=true
diff --git a/.config/monitors.xml b/.config/monitors.xml
new file mode 100644
index 0000000..d509c96
--- /dev/null
+++ b/.config/monitors.xml
@@ -0,0 +1,29 @@
+<monitors version="1">
+  <configuration>
+      <clone>no</clone>
+      <output name="DSI-1">
+          <vendor>???</vendor>
+          <product>0x0000</product>
+          <serial>0x00000000</serial>
+          <width>1200</width>
+          <height>1920</height>
+          <rate>60</rate>
+          <x>0</x>
+          <y>0</y>
+          <rotation>right</rotation>
+          <reflect_x>no</reflect_x>
+          <reflect_y>no</reflect_y>
+          <primary>yes</primary>
+      </output>
+      <output name="HDMI-1">
+      </output>
+      <output name="DP-1">
+      </output>
+      <output name="DP-2">
+      </output>
+      <output name="DP-3">
+      </output>
+      <output name="DP-4">
+      </output>
+  </configuration>
+</monitors>
diff --git a/.local/bin/auto-rotate b/.local/bin/auto-rotate
new file mode 100755
index 0000000..e7e2395
--- /dev/null
+++ b/.local/bin/auto-rotate
@@ -0,0 +1,54 @@
+#!/bin/bash
+# Auto-rotation daemon for GPD Pocket 3
+# Reads orientation from iio-sensor-proxy via monitor-sensor
+# Maps to xrandr rotations for DSI-1 (physically portrait panel)
+
+DISPLAY="${DISPLAY:-:0}"
+XAUTHORITY="${XAUTHORITY:-/home/tim-evans/.Xauthority}"
+export DISPLAY XAUTHORITY
+
+TOUCH="GXTP7380:00 27C6:0113"
+STYLUS="GXTP7380:00 27C6:0113 Stylus"
+OUTPUT="DSI-1"
+
+apply_rotation() {
+    local orient="$1"
+    local xrot touch_matrix
+
+    # CTM = R_left * R_display, because udev/libinput pre-applies R_right.
+    # The CTM must undo the libinput base then apply the current display rotation.
+    case "$orient" in
+        right-up)
+            xrot="right"
+            touch_matrix="1 0 0 0 1 0 0 0 1"       # identity (libinput already = right)
+            ;;
+        bottom-up)
+            xrot="inverted"
+            touch_matrix="0 1 0 -1 0 1 0 0 1"       # R_right
+            ;;
+        left-up)
+            xrot="left"
+            touch_matrix="-1 0 1 0 -1 1 0 0 1"      # R_inverted (180°)
+            ;;
+        normal)
+            xrot="normal"
+            touch_matrix="0 -1 1 1 0 0 0 0 1"       # R_left
+            ;;
+        *)
+            return
+            ;;
+    esac
+
+    xrandr --output "$OUTPUT" --rotate "$xrot" --scale 0.64x0.64
+    xinput set-prop "$TOUCH"  "Coordinate Transformation Matrix" $touch_matrix
+    xinput set-prop "$STYLUS" "Coordinate Transformation Matrix" $touch_matrix
+}
+
+# Apply scale immediately on startup (monitors.xml doesn't persist the transform)
+xrandr --output "$OUTPUT" --scale 0.64x0.64
+
+monitor-sensor 2>/dev/null | while IFS= read -r line; do
+    if [[ "$line" =~ "Accelerometer orientation changed: "(.+) ]]; then
+        apply_rotation "${BASH_REMATCH[1]}"
+    fi
+done
diff --git a/.local/share/libwacom/gpd-pocket3-0113.tablet b/.local/share/libwacom/gpd-pocket3-0113.tablet
new file mode 100644
index 0000000..6eb9dfc
--- /dev/null
+++ b/.local/share/libwacom/gpd-pocket3-0113.tablet
@@ -0,0 +1,16 @@
+# GPD Pocket 3 - Goodix GXTP7380 touch + pen sensor
+# Vendor: 27C6 (Goodix), Product: 0113
+
+[Device]
+Name=GPD Pocket 3 Pen
+ModelName=GXTP7380
+DeviceMatch=i2c:27c6:0113
+Class=ISDV4
+Width=7
+Height=5
+IntegratedIn=Display;System
+
+[Features]
+Stylus=true
+Touch=true
+Styli=0xfffff;0xffffe;
diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..a4c3ff3
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+# Install dotfiles by symlinking user-space files and deploying system files.
+# Run from anywhere; resolves paths relative to this script.
+
+set -e
+DOTFILES="$(cd "$(dirname "$0")" && pwd)"
+HOME_FILES=(
+    ".local/bin/auto-rotate"
+    ".local/share/libwacom/gpd-pocket3-0113.tablet"
+    ".config/autostart/auto-rotate.desktop"
+    ".config/monitors.xml"
+)
+
+echo "==> Symlinking user files..."
+for f in "${HOME_FILES[@]}"; do
+    src="$DOTFILES/$f"
+    dst="$HOME/$f"
+    mkdir -p "$(dirname "$dst")"
+    if [ -L "$dst" ] && [ "$(readlink "$dst")" = "$src" ]; then
+        echo "  already linked: $dst"
+    elif [ -e "$dst" ]; then
+        echo "  backing up existing: $dst -> $dst.bak"
+        mv "$dst" "$dst.bak"
+        ln -s "$src" "$dst"
+    else
+        ln -s "$src" "$dst"
+        echo "  linked: $dst"
+    fi
+done
+
+echo ""
+echo "==> Deploying system files (requires sudo)..."
+SYSTEM_FILES=(
+    "etc/udev/rules.d/99-gpd-pocket3-touch.rules"
+    "etc/X11/xorg.conf.d/99-touchscreen.conf"
+    "usr/local/bin/rotate.sh"
+)
+for f in "${SYSTEM_FILES[@]}"; do
+    src="$DOTFILES/system/$f"
+    dst="/$f"
+    sudo install -Dm644 "$src" "$dst"
+    echo "  installed: $dst"
+done
+sudo chmod +x /usr/local/bin/rotate.sh
+sudo udevadm control --reload-rules
+
+echo ""
+echo "Done. Log out and back in (or reboot) to apply autostart changes."
diff --git a/system/etc/X11/xorg.conf.d/99-touchscreen.conf b/system/etc/X11/xorg.conf.d/99-touchscreen.conf
new file mode 100644
index 0000000..7716467
--- /dev/null
+++ b/system/etc/X11/xorg.conf.d/99-touchscreen.conf
@@ -0,0 +1,5 @@
+Section "InputClass"
+  Identifier    "calibration"
+  MatchProduct  "GXTP7380"
+  Option        "TransformationMatrix" "0 1 0 -1 0 1 0 0 1"
+EndSection
diff --git a/system/etc/udev/rules.d/99-gpd-pocket3-touch.rules b/system/etc/udev/rules.d/99-gpd-pocket3-touch.rules
new file mode 100644
index 0000000..14d3633
--- /dev/null
+++ b/system/etc/udev/rules.d/99-gpd-pocket3-touch.rules
@@ -0,0 +1,2 @@
+ACTION=="add", KERNEL=="event[0-9]*", ATTRS{name}=="GXTP7380:00 27C6:0113", ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1"
+ACTION=="add", KERNEL=="event[0-9]*", ATTRS{name}=="GXTP7380:00 27C6:0113 Stylus", ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1"
diff --git a/system/usr/local/bin/rotate.sh b/system/usr/local/bin/rotate.sh
new file mode 100644
index 0000000..d68a04f
--- /dev/null
+++ b/system/usr/local/bin/rotate.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+# GPD Pocket 3 screen rotation with hotkeys
+# Cycles: right -> inverted -> left -> normal
+
+id_touchscreen="16"
+id_stylus="17"
+R_0="0 1 0 -1 0 1 0 0 1"
+R_90="-1 0 1 0 -1 1 0 0 1"
+R_180="0 -1 1 1 0 0 0 0 1"
+R_270="1 0 0 0 1 0 0 0 1"
+
+screen_orientation=$(xrandr --query --verbose | grep DSI-1 | awk '{print $5}')
+
+case "$screen_orientation" in
+  "right" )
+    xinput set-prop $id_touchscreen 'Coordinate Transformation Matrix' $R_90
+    xinput set-prop $id_stylus 'Coordinate Transformation Matrix' $R_90
+    xrandr --output DSI-1 --rotate inverted
+    ;;
+  "inverted" )
+    xinput set-prop $id_touchscreen 'Coordinate Transformation Matrix' $R_180
+    xinput set-prop $id_stylus 'Coordinate Transformation Matrix' $R_180
+    xrandr --output DSI-1 --rotate left
+    ;;
+  "left" )
+    xinput set-prop $id_touchscreen 'Coordinate Transformation Matrix' $R_270
+    xinput set-prop $id_stylus 'Coordinate Transformation Matrix' $R_270
+    xrandr --output DSI-1 --rotate normal
+    ;;
+  "normal" )
+    xinput set-prop $id_touchscreen 'Coordinate Transformation Matrix' $R_0
+    xinput set-prop $id_stylus 'Coordinate Transformation Matrix' $R_0
+    xrandr --output DSI-1 --rotate right
+    ;;
+esac