diff options
| author | Sean Young <sean@mess.org> | 2020-08-23 19:23:05 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-09-03 16:18:55 +0200 |
| commit | 528222d853f9283110f0118dd71d9f0ad686d586 (patch) | |
| tree | a1bca46afe71308a2832208ee2ea9c0c5b196338 /drivers/media/rc/iguanair.c | |
| parent | 32c3db3d9873ef822a9544259d68d0cd31c7bc64 (diff) | |
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/iguanair.c')
| -rw-r--r-- | drivers/media/rc/iguanair.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c index b5b993b33b80..84949baf9f6b 100644 --- a/drivers/media/rc/iguanair.c +++ b/drivers/media/rc/iguanair.c @@ -59,7 +59,7 @@ struct iguanair { #define MAX_IN_PACKET 8u #define MAX_OUT_PACKET (sizeof(struct send_packet) + BUF_SIZE) #define TIMEOUT 1000 -#define RX_RESOLUTION 21333 +#define RX_RESOLUTION 21 struct packet { uint16_t start; @@ -124,7 +124,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len) for (i = 0; i < 7; i++) { if (ir->buf_in[i] == 0x80) { rawir.pulse = false; - rawir.duration = US_TO_NS(21845); + rawir.duration = 21845; } else { rawir.pulse = (ir->buf_in[i] & 0x80) == 0; rawir.duration = ((ir->buf_in[i] & 0x7f) + 1) * |