firmware/br-ext-chip-allwinner/board/v83x/kernel/patches/00000-drivers_media_rc_ir-nec-decoder.c.patch

diff -drupN a/drivers/media/rc/ir-nec-decoder.c b/drivers/media/rc/ir-nec-decoder.c
--- a/drivers/media/rc/ir-nec-decoder.c	2018-08-06 17:23:04.000000000 +0300
+++ b/drivers/media/rc/ir-nec-decoder.c	2022-06-12 05:28:14.000000000 +0300
@@ -1,6 +1,6 @@
 /* ir-nec-decoder.c - handle NEC IR Pulse/Space protocol
  *
- * Copyright (C) 2010 by Mauro Carvalho Chehab
+ * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
  *
  * This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -49,9 +49,12 @@ static int ir_nec_decode(struct rc_dev *
 {
 	struct nec_dec *data = &dev->raw->nec;
 	u32 scancode;
-	enum rc_type rc_type;
 	u8 address, not_address, command, not_command;
 	bool send_32bits = false;
+	bool extended_nec = false;
+
+	if (!(dev->enabled_protocols & RC_BIT_NEC))
+		return 0;
 
 	if (!is_timing_event(ev)) {
 		if (ev.reset)
@@ -91,8 +94,9 @@ static int ir_nec_decode(struct rc_dev *
 			if (!dev->keypressed) {
 				IR_dprintk(1, "Discarding last key repeat: event after key up\n");
 			} else {
-				rc_repeat(dev);
-				IR_dprintk(1, "Repeat last key\n");
+				//IR_dprintk(1, "Repeat last key\n");
+				//rc_repeat(dev);
+				data->necx_repeat = true;
 				data->state = STATE_TRAILER_PULSE;
 			}
 			return 0;
@@ -118,10 +122,10 @@ static int ir_nec_decode(struct rc_dev *
 			geq_margin(ev.duration,
 			NEC_TRAILER_SPACE, NEC_UNIT / 2)) {
 				IR_dprintk(1, "Repeat last key\n");
-				rc_repeat(dev);
+				//rc_repeat(dev);
+				data->necx_repeat = true;
 				data->state = STATE_INACTIVE;
 				return 0;
-
 		} else if (data->count > NECX_REPEAT_BITS)
 			data->necx_repeat = false;
 
@@ -156,53 +160,71 @@ static int ir_nec_decode(struct rc_dev *
 		if (!geq_margin(ev.duration, NEC_TRAILER_SPACE, NEC_UNIT / 2))
 			break;
 
-		address     = bitrev8((data->bits >> 24) & 0xff);
-		not_address = bitrev8((data->bits >> 16) & 0xff);
-		command	    = bitrev8((data->bits >>  8) & 0xff);
-		not_command = bitrev8((data->bits >>  0) & 0xff);
+		if (data->necx_repeat) {
+			IR_dprintk(1, "Repeat last key\n");
+			rc_repeat(dev);
+		} else {
+			address     = bitrev8((data->bits >> 24) & 0xff);
+			not_address = bitrev8((data->bits >> 16) & 0xff);
+			command	    = bitrev8((data->bits >>  8) & 0xff);
+			not_command = bitrev8((data->bits >>  0) & 0xff);
+			IR_dprintk(1, "current comand: %02x\n", command);
 
-		if ((command ^ not_command) != 0xff) {
-			IR_dprintk(1, "NEC checksum error: received 0x%08x\n",
-				   data->bits);
-			send_32bits = true;
-		}
+			if ((command ^ not_command) != 0xff) {
+				IR_dprintk(1, "NEC checksum error: received 0x%08x\n",
+					   data->bits);
+				send_32bits = true;
+			}
 
-		if (send_32bits) {
-			/* NEC transport, but modified protocol, used by at
-			 * least Apple and TiVo remotes */
-			scancode = data->bits;
-			IR_dprintk(1, "NEC (modified) scancode 0x%08x\n", scancode);
-			rc_type = RC_TYPE_NEC32;
-		} else if ((address ^ not_address) != 0xff) {
-			/* Extended NEC */
-			scancode = address     << 16 |
-				   not_address <<  8 |
-				   command;
-			IR_dprintk(1, "NEC (Ext) scancode 0x%06x\n", scancode);
-			rc_type = RC_TYPE_NECX;
-		} else {
-			/* Normal NEC */
-			scancode = address << 8 | command;
-			IR_dprintk(1, "NEC scancode 0x%04x\n", scancode);
-			rc_type = RC_TYPE_NEC;
-		}
+			if ((address ^ not_address) != 0xff) {
+					IR_dprintk(1, "NEC checksum error: received 0x%08x\n",
+						   data->bits);
+					extended_nec = true;
+			}
 
-		if (data->is_nec_x)
-			data->necx_repeat = true;
+			if (send_32bits) {
+				/* NEC transport, but modified protocol, used by at
+				 * least Apple and TiVo remotes */
+				scancode = data->bits;
+				IR_dprintk(2, "NEC (modified) scancode 0x%08x\n", scancode);
+			} else {
+				if (extended_nec) {
+					/* Extended NEC */
+					scancode = address << 8  |
+						   not_address << 16 |
+						   command;
+					IR_dprintk(2, "Extended NEC scancode 0x%06x\n", scancode);
+				} else {
+					/* Normal NEC */
+					scancode = address << 24  |
+						   not_address << 16 |
+						   command << 8 |
+						   not_command;
+					IR_dprintk(2, "Normal NEC scancode 0x%08x\n", scancode);
+				}
+			}
+
+			if (data->is_nec_x)
+				data->necx_repeat = true;
+
+			rc_keydown(dev, RC_TYPE_NEC, scancode, 0);
+		}
 
-		rc_keydown(dev, rc_type, scancode, 0);
 		data->state = STATE_INACTIVE;
+		data->count = 0;
 		return 0;
 	}
 
 	IR_dprintk(1, "NEC decode failed at count %d state %d (%uus %s)\n",
 		   data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+
 	data->state = STATE_INACTIVE;
+	data->count = 0;
 	return -EINVAL;
 }
 
 static struct ir_raw_handler nec_handler = {
-	.protocols	= RC_BIT_NEC | RC_BIT_NECX | RC_BIT_NEC32,
+	.protocols	= RC_BIT_NEC,
 	.decode		= ir_nec_decode,
 };
 
@@ -223,6 +245,6 @@ module_init(ir_nec_decode_init);
 module_exit(ir_nec_decode_exit);
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mauro Carvalho Chehab");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
 MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
 MODULE_DESCRIPTION("NEC IR protocol decoder");