This is a note to let you know that I've just added the patch titled
[media] media/rc: Send sync space information on the lirc
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-rc-send-sync-space-information-on-the-lirc.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a8f29e89f2b54fbf2c52be341f149bc195b63a8b Mon Sep 17 00:00:00 2001
From: Austin Lund <austin.lund@xxxxxxxxx>
Date: Thu, 24 Jul 2014 07:40:20 -0300
Subject: [media] media/rc: Send sync space information on the lirc
device
From: Austin Lund <austin.lund@xxxxxxxxx>
commit a8f29e89f2b54fbf2c52be341f149bc195b63a8b upstream.
Userspace expects to see a long space before the first pulse is sent on
the lirc device. Currently, if a long time has passed and a new packet
is started, the lirc codec just returns and doesn't send anything. This
makes lircd ignore many perfectly valid signals unless they are sent in
quick sucession. When a reset event is delivered, we cannot know
anything about the duration of the space. But it should be safe to
assume it has been a long time and we just set the duration to maximum.
Signed-off-by: Austin Lund <austin.lund@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/rc/ir-lirc-codec.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -42,11 +42,17 @@ static int ir_lirc_decode(struct rc_dev
return -EINVAL;
/* Packet start */
- if (ev.reset)
- return 0;
+ if (ev.reset) {
+ /* Userspace expects a long space event before the start of
+ * the signal to use as a sync. This may be done with repeat
+ * packets and normal samples. But if a reset has been sent
+ * then we assume that a long time has passed, so we send a
+ * space with the maximum time value. */
+ sample = LIRC_SPACE(LIRC_VALUE_MASK);
+ IR_dprintk(2, "delivering reset sync space to lirc_dev\n");
/* Carrier reports */
- if (ev.carrier_report) {
+ } else if (ev.carrier_report) {
sample = LIRC_FREQUENCY(ev.carrier);
IR_dprintk(2, "carrier report (freq: %d)\n", sample);
Patches currently in stable-queue which might be from austin.lund@xxxxxxxxx are
queue-3.10/media-rc-send-sync-space-information-on-the-lirc.patch
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