linux-kernel - [PATCH v1] media: sensor:increase IR_MAX_DURATION to 1000ms to fix long IR remote timeouts Certain infrared remotes (e.g., brand-specific smart home remotes, custom consumer electronics) send extended code sequences that exceed the default 500ms IR_MAX_DURATION threshold. This causes the kernel's raw IR driver to discard incomplete code, resulting in unrecognized commands.

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Message-Id: <20260205014620.380126-1-huanglipeng@vivo.com>
Date: Thu,  5 Feb 2026 09:46:20 +0800
From: huanglipeng <huanglipeng@...o.com>
To: sean@...s.org,
	mchehab@...nel.org
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	LiPeng Huang <huanglipeng@...o.com>
Subject: [PATCH v1] media: sensor:increase IR_MAX_DURATION to 1000ms  to fix long IR remote timeouts Certain infrared remotes  (e.g., brand-specific smart home remotes, custom consumer electronics)  send extended code sequences that exceed the default 500ms  IR_MAX_DURATION threshold. This causes the kernel's raw  IR driver to discard incomplete code, resulting in unrecognized commands.

From: LiPeng Huang <huanglipeng@...o.com>

Increase IR_MAX_DURATION to 1000ms:
- Aligns with common extended IR protocol specs 
 (most long sequences use 700-900ms)
- No impact on standard remotes 
 (all mainstream IR codes are <500ms)
- Validated on vivo X200 and vivo X300, 
 resolves timeout issues without regressions

Signed-off-by: LiPeng Huang <huanglipeng@...o.com>
---
 include/media/rc-core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 35c7a0546f02..9214f3fc174d 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -303,7 +303,7 @@ struct ir_raw_event {
 
 #define US_TO_NS(usec)		((usec) * 1000)
 #define MS_TO_US(msec)		((msec) * 1000)
-#define IR_MAX_DURATION		MS_TO_US(500)
+#define IR_MAX_DURATION		MS_TO_US(1000)
 #define IR_DEFAULT_TIMEOUT	MS_TO_US(125)
 #define IR_MAX_TIMEOUT		LIRC_VALUE_MASK
 
-- 
2.34.1