Radix cross Linux

#
# rc.mesonfb - initial set up meson framebuffer
#
hdmimode=720p

# Parse command line arguments
for arg in $(cat /proc/cmdline); do
  case $arg in
    hdmimode=*)
      hdmimode="${arg#*=}"
      ;;
  esac
done

outputmode=$hdmimode

/bin/echo $outputmode > /sys/class/display/mode

# Enable framebuffer device
/bin/echo 0 > /sys/class/graphics/fb0/blank

# Blank fb1 to prevent static noise
/bin/echo 1 > /sys/class/graphics/fb1/blank

# Disable framebuffer scaling
/bin/echo 0 > /sys/class/graphics/fb0/free_scale
/bin/echo 0 > /sys/class/graphics/fb1/free_scale


/bin/echo 1 > /sys/class/graphics/fb0/freescale_mode

case $outputmode in
  480*)
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/window_axis
    ;;

  576*)
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/window_axis
    ;;

  720*)
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/window_axis
    ;;

  1080*)
    /bin/echo 0 0 1919 1079 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1919 1079 > /sys/class/graphics/fb0/window_axis
    ;;

  4k2k*)
    /bin/echo 0 0 1919 1079 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1919 1079 > /sys/class/graphics/fb0/window_axis
    ;;

  *)
    # outputmode = 720p
    /bin/echo 720p > /sys/class/display/mode
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/free_scale_axis
    /bin/echo 0 0 1279 719 > /sys/class/graphics/fb0/window_axis
    ;;
esac


# Set framebuffer geometry to match the resolution
case "$hdmimode" in
  720*)
    /usr/sbin/fbset -fb /dev/fb0 -a -g 1280 720 1280 1440 32
    ;;
  1080*)
    /usr/sbin/fbset -fb /dev/fb0 -a -g 1920 1080 1920 3240 32
    ;;
esac
/usr/sbin/fbset -fb /dev/fb1 -g 32 32 32 32 32

# Include deinterlacer into default VFM map
/bin/echo rm default > /sys/class/vfm/map
/bin/echo add default decoder ppmgr deinterlace amvideo > /sys/class/vfm/map

################################################################
#
# If HDMI cable is connected during kernel start and the new
# outputmode is equal to current hdmimode then the screen is
# black.
#
# To wake up the monitor, we must reset outputmode.
# Only in this case, the driver will wake the display up.
#
# Instead we will have to reconnect hdmi cable.
#
outputmode=$(cat /sys/class/display/mode)
hpdstate=$(cat /sys/class/amhdmitx/amhdmitx0/hpd_state)

if [ "$hpdstate" = "1" ]; then
  # Blank fb0 to prevent static noise
  /bin/echo 1 > /sys/class/graphics/fb0/blank
    case $outputmode in
      720*)
        /bin/echo 1080p > /sys/class/display/mode
        /bin/echo $outputmode > /sys/class/display/mode
        ;;

      1080*)
        /bin/echo 720p > /sys/class/display/mode
        /bin/echo $outputmode > /sys/class/display/mode
        ;;
      *)
        # probably nobody asks 480cvbs
        /bin/echo 480cvbs > /sys/class/display/mode
        /bin/echo $outputmode > /sys/class/display/mode
        ;;
    esac
  # Enable framebuffer device
  /bin/echo 0 > /sys/class/graphics/fb0/blank
fi
#
# End of HDMI cable reconnect trick.
#
################################################################

echo 0x10001 > /sys/class/graphics/fb0/free_scale
echo 0 > /sys/class/graphics/fb1/free_scale