v4l-utils: backport lircd2toml.py improvements

Signed-off-by: Matthias Reichl <hias@horus.com>

packages/sysutils/v4l-utils/patches/v4l-utils-101-backport-lircd2toml-improvements.patch

@@ -0,0 +1,38 @@
+From 2e1c2d2b2d69596aea953e241edb3d82764db718 Mon Sep 17 00:00:00 2001
+From: Sean Young <sean@mess.org>
+Date: Tue, 31 Dec 2019 18:24:05 +0000
+Subject: [PATCH] lircd2toml: warn when scancode has duplicate definitions
+
+In lircd.conf files, it is possible that the same scancode has multiple
+key definitions. In our rc keymap toml format, one scancode can only
+have one key definition.
+
+Possibly we should allow alternate names for scancode for transmitting;
+however, as a first step, we should warn if there are multiple
+definitions for the same scancode.
+
+Signed-off-by: Sean Young <sean@mess.org>
+---
+ contrib/lircd2toml.py | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/contrib/lircd2toml.py b/contrib/lircd2toml.py
+index 54ea12fc..ba4b14ec 100755
+--- a/contrib/lircd2toml.py
++++ b/contrib/lircd2toml.py
+@@ -131,7 +131,11 @@ class LircdParser:
+             for s in a:
+                 if s[0] == '#':
+                     break
+-                codes[int(s, 0)] = k
++                scancode = int(s, 0)
++                if scancode in codes:
++                    self.warning("scancode 0x{:x} has duplicate definition {} and {}".format(scancode, codes[scancode], k))
++
++                codes[scancode] = k
+ 
+     def read_raw_codes(self):
+         raw_codes = []
+-- 
+2.20.1
+