mipi: Add Transaction.is_long() from mipi_dsi_packet_format_is_long()

This can be used to check if a DSI packet should use the long format
for the given transaction.

Author: stephan-gh

mipi.py

@@ -10,6 +10,12 @@
 # Copyright (C) 2006 Nokia Corporation
 # Author: Imre Deak <[email protected]>
 #
+# Some code adapted from:
+# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/drm_mipi_dsi.c
+#
+# Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
+# Andrzej Hajda <[email protected]>
+#
 from __future__ import annotations
 
 from enum import IntEnum, unique, Enum
@@ -296,5 +302,27 @@ def identifier(self):
 	def description(self):
 		return self.name.lower().replace('_', ' ')
 
+	@property
+	def is_long(self):
+		# From mipi_dsi_packet_format_is_long()
+		return self in [
+			Transaction.NULL_PACKET,
+			Transaction.BLANKING_PACKET,
+			Transaction.GENERIC_LONG_WRITE,
+			Transaction.DCS_LONG_WRITE,
+			Transaction.PICTURE_PARAMETER_SET,
+			Transaction.COMPRESSED_PIXEL_STREAM,
+			Transaction.LOOSELY_PACKED_PIXEL_STREAM_YCBCR20,
+			Transaction.PACKED_PIXEL_STREAM_YCBCR24,
+			Transaction.PACKED_PIXEL_STREAM_YCBCR16,
+			Transaction.PACKED_PIXEL_STREAM_30,
+			Transaction.PACKED_PIXEL_STREAM_36,
+			Transaction.PACKED_PIXEL_STREAM_YCBCR12,
+			Transaction.PACKED_PIXEL_STREAM_16,
+			Transaction.PACKED_PIXEL_STREAM_18,
+			Transaction.PIXEL_STREAM_3BYTE_18,
+			Transaction.PACKED_PIXEL_STREAM_24,
+		]
+
 	def generate(self, payload: bytes, options: Options) -> str:
 		return self._generate(self, payload, options)