Merge branch 'fb-test-script' into 'master'

Add script to test fbcolor

See merge request Librem5/librem5-devkit-tools!7

debian/librem5-devkit-check.install

+# The pyunit tests
 test_scripts/test_*.py            usr/share/librem5-devkit/check/
+# The script that runs the pyunit tests
 test_scripts/librem5-devkit-check usr/bin/
+# Other helpers
+test_scripts/fb-color.py          usr/share/librem5-devkit/tools/

test_scripts/fb-color.py

+#!/usr/bin/python3
+#
+# SPDX-License-Identifier: GPL-3.0+
+#
+# Author: Guido Günther <agx@sigxcpu.org>
+
+import argparse
+import ctypes
+import struct
+import sys
+from fcntl import ioctl
+
+FBIOGET_VSCREENINFO = 0x4600
+
+
+class FbBitField(ctypes.Structure):
+    "See /u/i/linux/fb.h"
+
+    _fields_ = [
+        ('offset', ctypes.c_uint32),
+        ('length', ctypes.c_uint32),
+        ('msb_right', ctypes.c_uint32),
+    ]
+
+
+class VarScreenInfo(ctypes.Structure):
+    "See /u/i/linux/fb.h"
+
+    _fields_ = [
+        ('xres', ctypes.c_uint32),
+        ('yres', ctypes.c_uint32),
+        ('xres_virtual', ctypes.c_uint32),
+        ('yres_virtual', ctypes.c_uint32),
+        ('xoffset', ctypes.c_uint32),
+        ('yoffset', ctypes.c_uint32),
+
+        ('bits_per_pixel', ctypes.c_uint32),
+        ('grayscale', ctypes.c_uint32),
+
+        ('red', FbBitField),
+        ('green', FbBitField),
+        ('blue', FbBitField),
+        ('transp', FbBitField),
+
+        # ...
+    ]
+
+
+def get_screeninfo(fbdev):
+    vsi = VarScreenInfo()
+
+    ioctl(fbdev, FBIOGET_VSCREENINFO, vsi)
+    return vsi
+
+
+def int_with_base(x):
+    return int(x, 0)
+
+
+def main(argv):
+    parser = argparse.ArgumentParser(description='Check framebuffer but filling the screen with a single color.')
+    parser.add_argument('--fbdev', default='/dev/fb0',
+                        help='Framebuffer device to use')
+    parser.add_argument('--red', default='0xFF', type=int_with_base,
+                        help='Red component')
+    parser.add_argument('--green', default='0XFF', type=int_with_base,
+                        help='Green component')
+    parser.add_argument('--blue', default='0XFF', type=int_with_base,
+                        help='Blue component')
+    args = parser.parse_args()
+
+    alpha = 0xFF
+    with open(args.fbdev, 'wb') as f:
+        v = get_screeninfo(f)
+        print("Framebuuffer Device {0} {1.xres}x{1.yres}, {1.bits_per_pixel}bpp".format(args.fbdev, v))
+
+        len = v.xres * v.yres
+        f.write(struct.pack("BBBB", args.blue, args.green, args.red, alpha) * len)
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))