Merge branch 'monitor-support' into input

setup.sh

@@ -21,6 +21,11 @@ log '.: Setting up sono-os v0.1.0 :.'
 
 sleep 1
 draw_progress_bar 5
+log 'Installing dependancies ...'
+# TODO
+sleep 1
+
+draw_progress_bar 15
 log 'Installing scripts ...'
 # TODO
 sleep 1

src/rules/90-drm.rules

@@ -0,0 +1 @@
+SUBSYSTEM=="drm", ENV{MONITOR_LOCK}="/tmp/monitorlock", ENV{SONOLOG}="/tmp/sonolog.log", RUN+="/usr/local/bin/setupmonitor.sh"

src/scripts/python/conf/desktop.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+MainDisplay=HDMI-3
+Policy=Mirror

src/scripts/python/setupmonitor.py

@@ -29,15 +29,183 @@ Date:   2023 Mar 04
 """
 
 import Xlib.display
+import Xlib.ext.randr
+import configparser
+from util import edit_distance
+from util.egalax import get_egalax_drm_pure_name
+import subprocess
+from pathlib import Path
+import os 
+
+CONFIG_NAME = Path(os.path.dirname(os.path.realpath(__file__))) / "conf/desktop.conf"
+XRANDR = "/usr/bin/xrandr"
+
+def read_config():
+    """Reads config file of desktop setup
+
+    This function will reeds the config file of desktop. Config file contins
+    a default monitor port name which will be the main Monitor display.
+
+    NOTE: eGalax devide will be detected automatically from the /dev mountings.
+    """
+    config = configparser.ConfigParser()
+    read = config.read(CONFIG_NAME)
+    if not read:
+        raise FileNotFoundError("Desktop config file not found")
+    return config
+
+
+def all_connected_monitor():
+    """Generates all connected monitors
+
+    as a tuple of (atom name: str, width, height)
+    """
+    display = Xlib.display.Display()
+    root = display.screen().root
+    for m in root.xrandr_get_monitors().monitors:
+        yield (
+            display.get_atom_name(m.name),
+            m.width_in_pixels,
+            m.height_in_pixels,
+        )
+
+
+def get_edid_name(drm_name: str):
+    """Change eGalax DRM name to atom name
+    
+    This function is very sensitive to kernel version and might not work
+    with some kernels.
+    """
+    card_num, name = drm_name[4:].split("-", maxsplit=1)
+    first, second = name.rsplit("-", maxsplit=1)
+    return first + "-" + card_num + "-" + second
+
+
+def prepare_monitors(config):
+    """Prepare monitor names
+
+
+    Rules:
+        - Use default monitor port as the main monitor if it is connected
+            - If default monitor is not connected then use a monitor with
+              minimum edit distance.
+
+        - Use eGalax as touchpanel and if it's not connected return None.
+
+        - other connected monitors will be returned as a list
+
+    each monitor is returen as a
+
+    Returns
+        tuple: of
+            - main monitor -> tuple | None if no monitor available other than
+              touchpanel
+            - touchpanel   -> tuple | None if touchpanel did not exist
+            - other        -> list: this list may be empty if there is no other
+                                    monitor connected
+    """
+    main = config["DEFAULT"]["MainDisplay"]
+    all_monitors = list(all_connected_monitor())
+    egalax_drm = get_egalax_drm_pure_name()
+    egalax_name = get_edid_name(egalax_drm) if egalax_drm else None
+    egalax_monitor = None
+    main_monitor = None
+    for mon in all_monitors:
+        if egalax_name == mon[0]:
+            egalax_monitor = mon
+        if main == mon[0]:
+            main_monitor = mon
+    if egalax_monitor:
+        all_monitors.remove(egalax_monitor)
+    if not main_monitor:
+        try:
+            min_monitor = min(
+                all_monitors,
+                key=lambda x: edit_distance(main, x, len(main), len(x)),
+            )
+            main_monitor = min_monitor
+        except:
+            main_monitor = None
+            assert len(all_monitors) == 0
+    if main_monitor:
+        all_monitors.remove(main_monitor)
+    return main_monitor, egalax_monitor, all_monitors
+
+
+def baseline(main, egalax):
+    """Base of xrandr arguments
+    
+    Both main and egalax are monitor tuples mentioned in prepare_monitors"""
+    if not main and not egalax:
+        return [], None
+    elif not main and egalax:
+        return ["--output", egalax[0], "--primary", 
+                "--mode", f"{egalax[1]}x{egalax[2]}"], None
+    elif main and not egalax:
+        return ["--output", main[0], "--primary",
+                "--mode", f"{main[1]}x{main[2]}"], main[0]
+    else:
+        return ["--output", main[0], "--primary",
+                "--mode", f"{main[1]}x{main[2]}",
+                "--output", egalax[0], "--right-of", main[0],
+                "--mode", f"{egalax[1]}x{egalax[1]}"], egalax[0]
+
+
+def mirror_displays(main, egalax, others: list):
+    base, should_mirror = baseline(main, egalax)
+    if should_mirror:
+        for name, width, height in others:
+            base.extend(["--output", name, "--mode", f"{width}x{height}",
+                        "--same-as", main[0], 
+                        "--scale-from", f"{main[1]}x{main[2]}"])
+    return base
+
+
+def off_displays(main, egalax, others: list):
+    base, should_off = baseline(main, egalax)
+    if should_off:
+        for name, width, height in others:
+                base.extend(["--output", name, "--off"])
+    return base
+
+
+def stand_alone_displays(main, egalax, others: list):
+    base, rightmost = baseline(main, egalax)
+    if rightmost:
+        for name, width, height in others:
+            base.extend(["--output", name, "--mode", f"{width}x{height}",
+                        "--right-of", rightmost])
+            rightmost = name
+    return base
+
+
+POLICY = {
+    'Off': off_displays,
+    'Mirror': mirror_displays,
+    'StandAlone': stand_alone_displays
+}
+
+
+def config_xrandr(conf, main, egalax, others: list):
+    """Executes xrandr with policy in the conf
+    
+    Policies:
+        Policies are about monitors other than main and touch panel monitors.
+        There are three supported policies:
+            - Off: Disables other monitors (default policy if not in config)
+            - Mirror: Mirror other displays from main monitor.
+            - StandAlone: Each monitor is mapped to the right of each other
+    """
+    try:
+        policy = conf['DEFAULT']['Policy']
+    except:
+        policy = 'Off'
+    args = POLICY[policy](main, egalax, others)
+    cmd = [XRANDR] + args
+    subprocess.run(cmd)
 
-display = Xlib.display.Display()
-root = display.screen().root
-for m in root.xrandr_get_monitors(True).monitors:
-    connector = display.get_atom_name(m.name)
-    print(
-        f"{connector}, {m.width_in_pixels}x{m.height_in_pixels}, "
-        f"x={m.x}, y={m.y}"
-    )
 
 if __name__ == "__main__":
-    pass
+    conf = read_config()
+    main, egalax, others = prepare_monitors(conf)
+    config_xrandr(conf, main, egalax, others)

src/scripts/python/util/__init__.py

@@ -0,0 +1 @@
+from .common import edit_distance, max_match

src/scripts/python/util/common.py

@@ -33,3 +33,31 @@ def max_match(a: str, b: str) -> str:
             i += 1
         else:
             return a[0:i]
+
+
+def edit_distance(str1, str2, m, n):
+    # If first string is empty, the only option is to
+    # insert all characters of second string into first
+    if m == 0:
+        return n
+
+    # If second string is empty, the only option is to
+    # remove all characters of first string
+    if n == 0:
+        return m
+
+    # If last characters of two strings are same, nothing
+    # much to do. Ignore last characters and get count for
+    # remaining strings.
+    if str1[m - 1] == str2[n - 1]:
+        return edit_distance(str1, str2, m - 1, n - 1)
+
+    # If last characters are not same, consider all three
+    # operations on last character of first string, recursively
+    # compute minimum cost for all three operations and take
+    # minimum of three values.
+    return 1 + min(
+        edit_distance(str1, str2, m, n - 1),  # Insert
+        edit_distance(str1, str2, m - 1, n),  # Remove
+        edit_distance(str1, str2, m - 1, n - 1),  # Replace
+    )

src/scripts/python/util/egalax.py

@@ -5,8 +5,8 @@ touchpannel's drm output and its overal status.
 """
 
 from pathlib import Path
-from x import get_edid_dev_path
+from .x import get_edid_dev_path
-from common import max_match
+from .common import max_match
 
 VENDOR_ID = "0EEF"
 DEVICE_ID = "C000"

src/scripts/setupmonitor.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# This script will run when drm change event detected.
+# This sctipt should be placed in /usr/local/bin
+# SONOLOG file must be set beforehand in the udev rule
+# MONITOR_LOCK should be set
+(
+    flock -n 100 || exit 1
+    sleep 1 # wait until all changes take place
+    xrandr --auto
+    python3 /usr/bin/local/python/setupmonitor.py
+    echo $(data) - INFO - Setup Monitor Done >> $SONOLOG
+) 100> $MONITOR_LOCK