Mount filesystems earlier (#568)

* Mount local filesystems earlier

* cleanup

* rm

* revert that

* cleanup

userspace/root/usr/comma/fs_setup.sh

@@ -1,5 +1,61 @@
 #!/bin/bash
 
+PATH=/usr/sbin:/usr/bin:/sbin:/bin
+
+log() {
+  echo "fs_setup[$$]: $(cut -d' ' -f1 /proc/uptime) $*" > /dev/kmsg
+}
+
+wait_for_block() {
+  local device="$1"
+  local i
+
+  for ((i = 0; i < 150; i++)); do
+    if [[ -b "$device" ]]; then
+      return 0
+    fi
+    sleep 0.02
+  done
+
+  log "timed out waiting for $device"
+  return 1
+}
+
+mount_fs() {
+  local what="$1"
+  local where="$2"
+  local type="$3"
+  local options="$4"
+
+  if [[ "$what" == /dev/* ]] && ! wait_for_block "$what"; then
+    failed=1
+    return 1
+  fi
+
+  log "mounting $where"
+  if mount --mkdir -t "$type" -o "$options" "$what" "$where"; then
+    log "mounted $where"
+    return 0
+  fi
+
+  log "failed mounting $where"
+  failed=1
+  return 1
+}
+
+log "start"
+
+failed=0
+mount_fs /dev/sde9 /dsp ext4 ro
+mount_fs /dev/sde4 /firmware vfat ro
+mount_fs /dev/sda2 /persist squashfs ro,nosuid,nodev,noexec
+mount_fs /dev/sda10 /systemrw ext4 relatime,data=ordered,noauto_da_alloc,discard,noexec,nodev
+mount_fs /dev/sda12 /data ext4 discard,noatime,nodiratime,nosuid,nodev
+mount_fs /dev/sda11 /cache ext4 relatime,data=ordered,noauto_da_alloc,discard,noexec,nodev,nosuid
+mount_fs tmpfs /var tmpfs rw,nosuid,nodev,size=128M,mode=755
+mount_fs tmpfs /tmp tmpfs rw,nosuid,nodev,size=150M,mode=1777
+mount_fs tmpfs /rwtmp tmpfs rw,nosuid,nodev,size=100M,mode=1777
+
 # Ensure the symlinks in the read only rootfs are
 # backed by real files and directories on userdata.
 
@@ -39,3 +95,10 @@ mkdir -p /data/tmp/
 if [[ ! -d /data/persist ]]; then
   sudo cp -r /system/persist /data
 fi
+
+if [[ "$failed" -ne 0 ]]; then
+  log "mounts failed"
+  exit 1
+fi
+
+log "done"

userspace/root/usr/comma/magic.py

@@ -10,6 +10,7 @@ WESTON_SOCK_PATH = os.path.join(WESTON_RUNTIME_DIR, "wayland-0")
 
 SOCK_PATH = "/tmp/drmfd.sock"
 DRM_DEVICE = "/dev/dri/card0"
+BACKLIGHT_POWER = "/sys/class/backlight/panel0-backlight/bl_power"
 BACKGROUND = "/usr/comma/bg.jpg"
 
 # This is needed to keep the old updater working. Updater used to be stored in
@@ -93,6 +94,9 @@ def main():
       time.sleep(0.1)
 
   os.environ['DRM_FD'] = str(drm_master)
+  while not os.access(BACKLIGHT_POWER, os.W_OK):
+    time.sleep(0.1)
+
   rl.init_window(0, 0, "not weston")
   img = rl.load_image(BACKGROUND)
   rl.image_resize(img, rl.get_screen_width(), rl.get_screen_width()//2)