Add DMT script

Add script to auto-generate DMT tables.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/scripts/dmt.py b/scripts/dmt.py
new file mode 100755 (executable)
index 0000000..82defb6
--- /dev/null
+++ b/scripts/dmt.py
@@ -0,0 +1,107 @@
+#!/usr/bin/python3
+
+import sys
+import re
+
+# Convert DMT pdf to txt:
+# pdftotext -layout -f 18 -l 105  DMTr1\ v13.pdf DMT.txt
+
+# Path to the text file
+filepath = sys.argv[1]
+
+m = {}
+line = ""
+
+def parsei(key, regex, base=10):
+       global m
+       global line
+
+       match = re.search(regex, line)
+       if match != None:
+               m[key] = int(match.group(1), base)
+
+def parsef(key, regex, base=10):
+       global m
+       global line
+
+       match = re.search(regex, line)
+       if match != None:
+               m[key] = float(match.group(1))
+
+for line in open(filepath, 'r'):
+       # each page starts with this
+       if "VESA MONITOR TIMING STANDARD" in line:
+               m = { }
+
+       # each page ends with this
+       if "VESA Display Monitor Timing Standard" in line:
+               print("// {:#x} - {}".format(m["dmt_id"], m["name"]))
+
+               flags = []
+               if m["ilace"]:
+                       flags += [ "DRM_MODE_FLAG_INTERLACE" ]
+
+               if m["hsp"]:
+                       flags += [ "DRM_MODE_FLAG_PHSYNC" ]
+               else:
+                       flags += [ "DRM_MODE_FLAG_NHSYNC" ]
+
+               if m["vsp"]:
+                       flags += [ "DRM_MODE_FLAG_PVSYNC" ]
+               else:
+                       flags += [ "DRM_MODE_FLAG_NVSYNC" ]
+
+               print("DRM_MODE(\"{}\", {}, {}, {}, {}, {}, {}, {}, {}, {}, {}),".format(
+                       m["name"],
+                       int(m["pclk"] * 1000),
+                       m["hact"], m["hfp"], m["hsw"], m["hbp"],
+                       m["vact"], m["vfp"], m["vsw"], m["vbp"],
+                       " | ".join(flags)
+                       ))
+
+       match = re.search("Timing Name\s+=\s+([^;]+)", line)
+       if match != None:
+               m["name"] = str.strip(match.group(1))
+
+       parsei("dmt_id", "EDID ID:\s+DMT ID: ([0-9A-Fa-f]+)h", 16)
+       parsef("pclk", "Pixel Clock\s+=\s+(\d+\.\d+)")
+
+       parsei("hact", "Hor Pixels\s+=\s+(\d+)")
+       parsei("hfp", "H Front Porch.*\s(\d+) Pixels")
+       parsei("hsw", "Hor Sync Time.*\s(\d+) Pixels")
+       parsei("hbp", "H Back Porch.*\s(\d+) Pixels")
+
+       parsei("vact", "Ver Pixels\s+=\s+(\d+)")
+       parsei("vfp", "V Front Porch.*\s(\d+)\s+lines")
+       parsei("vsw", "Ver Sync Time.*\s(\d+)\s+lines")
+       parsei("vbp", "V Back Porch.*\s(\d+)\s+lines")
+
+       match = re.search("Scan Type\s+=\s+(\w+);", line)
+       if match != None:
+               if match.group(1) == "NONINTERLACED":
+                       m["ilace"] = False
+               elif match.group(1) == "INTERLACED":
+                       m["ilace"] = True
+               else:
+                       print("Bad scan type")
+                       exit(-1)
+
+       match = re.search("Hor Sync Polarity\s+=\s+(\w+)", line)
+       if match != None:
+               if match.group(1) == "POSITIVE":
+                       m["hsp"] = True
+               elif match.group(1) == "NEGATIVE":
+                       m["hsp"] = False
+               else:
+                       print("Bad hsync polarity")
+                       exit(-1)
+
+       match = re.search("Ver Sync Polarity\s+=\s+(\w+)", line)
+       if match != None:
+               if match.group(1) == "POSITIVE":
+                       m["vsp"] = True
+               elif match.group(1) == "NEGATIVE":
+                       m["vsp"] = False
+               else:
+                       print("Bad vsync polarity")
+                       exit(-1)