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Fix RC5 decoding with Fintek CIR chipset

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commit bbdb34c90aeb8b2253eae88029788ebe1d7f2fd4 upstream.

Fix RC5 decoding with Fintek CIR chipset

Commit e87b540be2 tightened up the RC5
decoding by adding a check for trailing silence to ensure a valid RC5
command had been received. Unfortunately the trailer length checked was
10 units and the Fintek CIR device does not want to provide details of a
space longer than 6350us. This meant that RC5 remotes working on a
Fintek setup on 3.16 failed on 3.17 and later. Fix this by shortening
the trailer check to 6 units (allowing for a previous space in the
received remote command).

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=117221

Signed-off-by: Jonathan McDowell <noodles@earth.li>
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jonathan McDowell 2016-05-14 14:01:26 -03:00 • committed by Greg Kroah-Hartman
parent 33201bcbc3
commit 8dbd7a3684
1 changed files with 1 additions and 1 deletions
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2
drivers/media/rc/ir-rc5-decoder.c
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@ -29,7 +29,7 @@
#define RC5_BIT_START (1 * RC5_UNIT) #define RC5_BIT_START (1 * RC5_UNIT)
#define RC5_BIT_END (1 * RC5_UNIT) #define RC5_BIT_END (1 * RC5_UNIT)
#define RC5X_SPACE (4 * RC5_UNIT) #define RC5X_SPACE (4 * RC5_UNIT)
#define RC5_TRAILER (10 * RC5_UNIT) /* In reality, approx 100 */ #define RC5_TRAILER (6 * RC5_UNIT) /* In reality, approx 100 */
enum rc5_state { enum rc5_state {
STATE_INACTIVE, STATE_INACTIVE,