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media: lirc: always send timeout reports

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Without timeout reports, it is impossible to decode many protocols since
it is not known when the transmission ends. timeout reports are sent by
default, but can be turned off. There is no reason to turn them off, and
I cannot find any software which does this, so we can safely remove it.

This makes the ioctl LIRC_SET_REC_TIMEOUT_REPORTS a no-op.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sean Young 2021-11-27 12:46:58 +01:00 committed by Mauro Carvalho Chehab
parent 9b4d7b5c81
commit 74747dda58
6 changed files with 5 additions and 62 deletions
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2
Documentation/userspace-api/media/lirc.h.rst.exceptions
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@ -33,6 +33,7 @@ ignore define LIRC_CAN_SET_REC_DUTY_CYCLE
# Obsolete ioctls
ignore ioctl LIRC_GET_LENGTH
ignore ioctl LIRC_SET_REC_TIMEOUT_REPORTS
# rc protocols
@ -73,6 +74,7 @@ ignore define PULSE_MASK
ignore define LIRC_MODE2_SPACE
ignore define LIRC_MODE2_PULSE
ignore define LIRC_MODE2_TIMEOUT
ignore define LIRC_VALUE_MASK
ignore define LIRC_MODE2_MASK

8
Documentation/userspace-api/media/rc/lirc-dev-intro.rst
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@ -117,11 +117,9 @@ on the following table.
``LIRC_MODE2_TIMEOUT``
If timeout reports are enabled with
:ref:`lirc_set_rec_timeout_reports`, when the timeout set with
:ref:`lirc_set_rec_timeout` expires due to no IR being detected,
this packet will be sent, with the number of microseconds with
no IR.
When the timeout set with :ref:`lirc_set_rec_timeout` expires due
to no IR being detected, this packet will be sent, with the number
of microseconds with no IR.
.. _lirc-mode-pulse:

1
Documentation/userspace-api/media/rc/lirc-func.rst
View File

@ -22,6 +22,5 @@ LIRC Function Reference
lirc-set-rec-carrier-range
lirc-set-send-carrier
lirc-set-transmitter-mask
lirc-set-rec-timeout-reports
lirc-set-measure-carrier-mode
lirc-set-wideband-receiver

49
Documentation/userspace-api/media/rc/lirc-set-rec-timeout-reports.rst
View File

@ -1,49 +0,0 @@
.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
.. c:namespace:: RC
.. _lirc_set_rec_timeout_reports:
**********************************
ioctl LIRC_SET_REC_TIMEOUT_REPORTS
**********************************
Name
====
LIRC_SET_REC_TIMEOUT_REPORTS - enable or disable timeout reports for IR receive
Synopsis
========
.. c:macro:: LIRC_SET_REC_TIMEOUT_REPORTS
``int ioctl(int fd, LIRC_SET_REC_TIMEOUT_REPORTS, __u32 *enable)``
Arguments
=========
``fd``
File descriptor returned by open().
``enable``
enable = 1 means enable timeout report, enable = 0 means disable timeout
reports.
Description
===========
.. _lirc-mode2-timeout:
Enable or disable timeout reports for IR receive. By default, timeout reports
should be turned off.
.. note::
This ioctl is only valid for :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>`.
Return Value
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.

5
drivers/media/rc/lirc_dev.c
View File

@ -102,8 +102,6 @@ void lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev)
spin_lock_irqsave(&dev->lirc_fh_lock, flags);
list_for_each_entry(fh, &dev->lirc_fh, list) {
if (LIRC_IS_TIMEOUT(sample) && !fh->send_timeout_reports)
continue;
if (kfifo_put(&fh->rawir, sample))
wake_up_poll(&fh->wait_poll, EPOLLIN | EPOLLRDNORM);
}
@ -166,7 +164,6 @@ static int lirc_open(struct inode *inode, struct file *file)
fh->send_mode = LIRC_MODE_PULSE;
fh->rc = dev;
fh->send_timeout_reports = true;
if (dev->driver_type == RC_DRIVER_SCANCODE)
fh->rec_mode = LIRC_MODE_SCANCODE;
@ -570,8 +567,6 @@ static long lirc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case LIRC_SET_REC_TIMEOUT_REPORTS:
if (dev->driver_type != RC_DRIVER_IR_RAW)
ret = -ENOTTY;
else
fh->send_timeout_reports = !!val;
break;
default:

2
include/media/rc-core.h
View File

@ -59,7 +59,6 @@ enum rc_filter_type {
* @rc: rcdev for this lirc chardev
* @carrier_low: when setting the carrier range, first the low end must be
* set with an ioctl and then the high end with another ioctl
* @send_timeout_reports: report timeouts in lirc raw IR.
* @rawir: queue for incoming raw IR
* @scancodes: queue for incoming decoded scancodes
* @wait_poll: poll struct for lirc device
@ -72,7 +71,6 @@ struct lirc_fh {
struct list_head list;
struct rc_dev *rc;
int carrier_low;
bool send_timeout_reports;
DECLARE_KFIFO_PTR(rawir, unsigned int);
DECLARE_KFIFO_PTR(scancodes, struct lirc_scancode);
wait_queue_head_t wait_poll;