mipi: Handle weird NULL_PACKET

This seems to be just a dummy packet, in this case used to insert
a delay. The delay will still be generated, but we don't actually
send any packet to the panel. I doubt this is really necessary.

Author: stephan-gh

driver.py

@@ -147,9 +147,9 @@ def generate_commands(p: Panel, options: Options, cmd_name: str) -> str:
 
 	block = True
 	for c in cmd.seq:
-		if block or '{' in c.generated:
+		if block or '{' in c.generated or '//' in c.generated:
 			s += '\n'
-		block = '{' in c.generated
+		block = '{' in c.generated or '//' in c.generated
 
 		s += c.generated + '\n'
 		if c.wait and c.wait > options.ignore_wait:

mipi.py

@@ -209,6 +209,10 @@ def _generate_peripheral(t: Transaction, payload: bytes, options: Options) -> st
 		raise ValueError(t)
 
 
+def _generate_null_packet(t: Transaction, payload: bytes, options: Options) -> str:
+	return "\t// WARNING: Ignoring weird NULL_PACKET (dummy packet)"
+
+
 def _generate_fallback(t: Transaction, payload: bytes, options: Options) -> str:
 	raise ValueError(t.name + ' is not supported')
 
@@ -246,7 +250,7 @@ class Transaction(Enum):
 
 	END_OF_TRANSMISSION = 0x08,
 
-	NULL_PACKET = 0x09,
+	NULL_PACKET = 0x09, -1, _generate_null_packet
 	BLANKING_PACKET = 0x19,
 	GENERIC_LONG_WRITE = 0x29, -1, _generate_generic_write
 	DCS_LONG_WRITE = 0x39, -1, _generate_dcs_write