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authorSean Young <sean@mess.org>2020-08-23 20:23:05 +0300
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-09-03 17:18:55 +0300
commit528222d853f9283110f0118dd71d9f0ad686d586 (patch)
treea1bca46afe71308a2832208ee2ea9c0c5b196338 /drivers/media/rc/ir-nec-decoder.c
parent32c3db3d9873ef822a9544259d68d0cd31c7bc64 (diff)
downloadlinux-528222d853f9283110f0118dd71d9f0ad686d586.tar.xz
media: rc: harmonize infrared durations to microseconds
rc-core kapi uses nanoseconds for infrared durations for receiving, and microseconds for sending. The uapi already uses microseconds for both, so this patch does not change the uapi. Infrared durations do not need nanosecond resolution. IR protocols do not have durations shorter than about 100 microseconds. Some IR hardware offers 250 microseconds resolution, which is sufficient for most protocols. Better hardware has 50 microsecond resolution and is enough for every protocol I am aware off. Unify on microseconds everywhere. This simplifies the code since less conversion between microseconds and nanoseconds needs to be done. This affects: - rx_resolution member of struct rc_dev - timeout member of struct rc_dev - duration member in struct ir_raw_event Cc: "Bruno Prémont" <bonbons@linux-vserver.org> Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl> Cc: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Patrick Lerda <patrick9876@free.fr> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Jerome Brunet <jbrunet@baylibre.com> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Cc: Sean Wang <sean.wang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Chen-Yu Tsai <wens@csie.org> Cc: "David Härdeman" <david@hardeman.nu> Cc: Benjamin Valentin <benpicco@googlemail.com> Cc: Antti Palosaari <crope@iki.fi> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/rc/ir-nec-decoder.c')
-rw-r--r--drivers/media/rc/ir-nec-decoder.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/rc/ir-nec-decoder.c b/drivers/media/rc/ir-nec-decoder.c
index 6a8973ae3684..b4c3e4baf34d 100644
--- a/drivers/media/rc/ir-nec-decoder.c
+++ b/drivers/media/rc/ir-nec-decoder.c
@@ -8,7 +8,7 @@
#include "rc-core-priv.h"
#define NEC_NBITS 32
-#define NEC_UNIT 562500 /* ns */
+#define NEC_UNIT 563 /* us */
#define NEC_HEADER_PULSE (16 * NEC_UNIT)
#define NECX_HEADER_PULSE (8 * NEC_UNIT) /* Less common NEC variant */
#define NEC_HEADER_SPACE (8 * NEC_UNIT)
@@ -50,7 +50,7 @@ static int ir_nec_decode(struct rc_dev *dev, struct ir_raw_event ev)
}
dev_dbg(&dev->dev, "NEC decode started at state %d (%uus %s)\n",
- data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ data->state, ev.duration, TO_STR(ev.pulse));
switch (data->state) {
@@ -163,7 +163,7 @@ static int ir_nec_decode(struct rc_dev *dev, struct ir_raw_event ev)
}
dev_dbg(&dev->dev, "NEC decode failed at count %d state %d (%uus %s)\n",
- data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ data->count, data->state, ev.duration, TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}