IR remote stopped working in kernels 4.5 and 4.6

IR remote stopped working in kernels 4.5 and 4.6

[James Bottomley]

This looks to be a problem with the rc subsystem.  The IR controller in
question is part of a cx8800 atsc card. In the 4.4 kernel, where it
works, this is what ir-keytable says:

Found /sys/class/rc/rc0/ (/dev/input/event12) with:
	Driver cx88xx, table rc-hauppauge
	Supported protocols: other lirc rc-5 jvc sony nec sanyo mce-kbd rc-6 sharp xmp 
	Enabled protocols: lirc nec 
	Name: cx88 IR (pcHDTV HD3000 HDTV)
	bus: 1, vendor/product: 7063:3000, version: 0x0001
	Repeat delay = 500 ms, repeat period = 125 ms

And in 4.6, where it doesn't work:

Found /sys/class/rc/rc0/ (/dev/input/event12) with:
	Driver cx88xx, table rc-hauppauge
	Supported protocols: lirc 
	Enabled protocols: lirc 
	Name: cx88 IR (pcHDTV HD3000 HDTV)
	bus: 1, vendor/product: 7063:3000, version: 0x0001
	Repeat delay = 500 ms, repeat period = 125 ms

The particular remote in question seems to require the nec protocol to
work and the failure in 4.5 and 4.6 is having any supported protocols
at all.  I can get the remote to start working again by adding the nec
protocol:

echo nec > /sys/class/rc/rc0/protocols

But it would be nice to have this happen by default rather than having
to add yet another work around init script.

James

Re: IR remote stopped working in kernels 4.5 and 4.6

[Heiner Kallweit]

Am 04.07.2016 um 22:36 schrieb James Bottomley:
> This looks to be a problem with the rc subsystem.  The IR controller in
> question is part of a cx8800 atsc card. In the 4.4 kernel, where it
> works, this is what ir-keytable says:
> 
> Found /sys/class/rc/rc0/ (/dev/input/event12) with:
> 	Driver cx88xx, table rc-hauppauge
> 	Supported protocols: other lirc rc-5 jvc sony nec sanyo mce-kbd rc-6 sharp xmp 
> 	Enabled protocols: lirc nec 
> 	Name: cx88 IR (pcHDTV HD3000 HDTV)
> 	bus: 1, vendor/product: 7063:3000, version: 0x0001
> 	Repeat delay = 500 ms, repeat period = 125 ms
> 
> And in 4.6, where it doesn't work:
> 
> Found /sys/class/rc/rc0/ (/dev/input/event12) with:
> 	Driver cx88xx, table rc-hauppauge
> 	Supported protocols: lirc 
> 	Enabled protocols: lirc 
> 	Name: cx88 IR (pcHDTV HD3000 HDTV)
> 	bus: 1, vendor/product: 7063:3000, version: 0x0001
> 	Repeat delay = 500 ms, repeat period = 125 ms
> 
> The particular remote in question seems to require the nec protocol to
> work and the failure in 4.5 and 4.6 is having any supported protocols
> at all.  I can get the remote to start working again by adding the nec
> protocol:
> 
> echo nec > /sys/class/rc/rc0/protocols
> 
> But it would be nice to have this happen by default rather than having
> to add yet another work around init script.
> 
Meanwhile decoder modules are loaded on demand only. This can be done
automatically w/o the need for additional init scripts.

If /etc/rc_maps.cfg includes a keymap with type NEC then the nec decoder
module is loaded automatically.

My rc_maps.cfg looks like this (and causes the SONY decoder module to be
loaded automatically):

#driver table                    file
*       *        sony-rm-sx800

And the keymap:

# table sony-rm-sx800, type SONY
0x110030        KEY_PREVIOUS
0x110031        KEY_NEXT
0x110033        KEY_BACK
..
..

Heiner

> James
> 
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Re: IR remote stopped working in kernels 4.5 and 4.6

[James Bottomley]

On Mon, 2016-07-04 at 23:08 +0200, Heiner Kallweit wrote:
> Am 04.07.2016 um 22:36 schrieb James Bottomley:
> > This looks to be a problem with the rc subsystem.  The IR 
> > controller in question is part of a cx8800 atsc card. In the 4.4 
> > kernel, where it works, this is what ir-keytable says:
> > 
> > Found /sys/class/rc/rc0/ (/dev/input/event12) with:
> > 	Driver cx88xx, table rc-hauppauge
> > 	Supported protocols: other lirc rc-5 jvc sony nec sanyo mce-kbd
> > rc-6 sharp xmp 
> > 	Enabled protocols: lirc nec 
> > 	Name: cx88 IR (pcHDTV HD3000 HDTV)
> > 	bus: 1, vendor/product: 7063:3000, version: 0x0001
> > 	Repeat delay = 500 ms, repeat period = 125 ms
> > 
> > And in 4.6, where it doesn't work:
> > 
> > Found /sys/class/rc/rc0/ (/dev/input/event12) with:
> > 	Driver cx88xx, table rc-hauppauge
> > 	Supported protocols: lirc 
> > 	Enabled protocols: lirc 
> > 	Name: cx88 IR (pcHDTV HD3000 HDTV)
> > 	bus: 1, vendor/product: 7063:3000, version: 0x0001
> > 	Repeat delay = 500 ms, repeat period = 125 ms
> > 
> > The particular remote in question seems to require the nec protocol 
> > to work and the failure in 4.5 and 4.6 is having any supported
> > protocols at all.  I can get the remote to start working again by 
> > adding the nec protocol:
> > 
> > echo nec > /sys/class/rc/rc0/protocols
> > 
> > But it would be nice to have this happen by default rather than 
> > having to add yet another work around init script.
> > 
> Meanwhile decoder modules are loaded on demand only. This can be done
> automatically w/o the need for additional init scripts.
> 
> If /etc/rc_maps.cfg includes a keymap with type NEC then the nec 
> decoder module is loaded automatically.
> 
> My rc_maps.cfg looks like this (and causes the SONY decoder module to 
> be loaded automatically):
> 
> #driver table                    file
> *       *        sony-rm-sx800
> 
> And the keymap:
> 
> # table sony-rm-sx800, type SONY
> 0x110030        KEY_PREVIOUS
> 0x110031        KEY_NEXT
> 0x110033        KEY_BACK
> ..
> ..


Well, to work in the 4.4 kernel, the rc_maps.cfg names a table with the
nec controller, so it seems that whatever is supposed to trigger
autoloading isn't.

Is ir-keytable supposed to do this?  The current debian testing one is

Package: ir-keytable
Source: v4l-utils
Version: 1.10.1-1

Which seems to be the most current one.

James

Re: IR remote stopped working in kernels 4.5 and 4.6

[Heiner Kallweit]

Am 04.07.2016 um 23:18 schrieb James Bottomley:
> On Mon, 2016-07-04 at 23:08 +0200, Heiner Kallweit wrote:
>> Am 04.07.2016 um 22:36 schrieb James Bottomley:
>>> This looks to be a problem with the rc subsystem.  The IR 
>>> controller in question is part of a cx8800 atsc card. In the 4.4 
>>> kernel, where it works, this is what ir-keytable says:
>>>
>>> Found /sys/class/rc/rc0/ (/dev/input/event12) with:
>>> 	Driver cx88xx, table rc-hauppauge
>>> 	Supported protocols: other lirc rc-5 jvc sony nec sanyo mce-kbd
>>> rc-6 sharp xmp 
>>> 	Enabled protocols: lirc nec 
>>> 	Name: cx88 IR (pcHDTV HD3000 HDTV)
>>> 	bus: 1, vendor/product: 7063:3000, version: 0x0001
>>> 	Repeat delay = 500 ms, repeat period = 125 ms
>>>
>>> And in 4.6, where it doesn't work:
>>>
>>> Found /sys/class/rc/rc0/ (/dev/input/event12) with:
>>> 	Driver cx88xx, table rc-hauppauge
>>> 	Supported protocols: lirc 
After having had a look at the cx88 driver the issue seems to be there.
For the HD3000 allowed_protocols is initialized to RC_BIT_OTHER only.
This prevents autoloading of the NEC module.

If the device is not restricted to a particular protocol (some devices
supported by cx88 seem to be restricted to the NEC protocol) then
allowed_protocols should be set to RC_BIT_ALL.

Can you test with this change?

If HD3000 is restricted to NEC then the initialization should be
similar to e.g. PROLINK PLAYTVPVR

>>> 	Enabled protocols: lirc 
>>> 	Name: cx88 IR (pcHDTV HD3000 HDTV)
>>> 	bus: 1, vendor/product: 7063:3000, version: 0x0001
>>> 	Repeat delay = 500 ms, repeat period = 125 ms
>>>
>>> The particular remote in question seems to require the nec protocol 
>>> to work and the failure in 4.5 and 4.6 is having any supported
>>> protocols at all.  I can get the remote to start working again by 
>>> adding the nec protocol:
>>>
>>> echo nec > /sys/class/rc/rc0/protocols
>>>
>>> But it would be nice to have this happen by default rather than 
>>> having to add yet another work around init script.
>>>
>> Meanwhile decoder modules are loaded on demand only. This can be done
>> automatically w/o the need for additional init scripts.
>>
>> If /etc/rc_maps.cfg includes a keymap with type NEC then the nec 
>> decoder module is loaded automatically.
>>
>> My rc_maps.cfg looks like this (and causes the SONY decoder module to 
>> be loaded automatically):
>>
>> #driver table                    file
>> *       *        sony-rm-sx800
>>
>> And the keymap:
>>
>> # table sony-rm-sx800, type SONY
>> 0x110030        KEY_PREVIOUS
>> 0x110031        KEY_NEXT
>> 0x110033        KEY_BACK
>> ..
>> ..
> 
> 
> Well, to work in the 4.4 kernel, the rc_maps.cfg names a table with the
> nec controller, so it seems that whatever is supposed to trigger
> autoloading isn't.
> 
> Is ir-keytable supposed to do this?  The current debian testing one is
> 
> Package: ir-keytable
> Source: v4l-utils
> Version: 1.10.1-1
> 
> Which seems to be the most current one.
> 
> James
> 
>