On 2021-01-07 03:25, Sean Young wrote:
Hi Tom,
On Wed, Jan 06, 2021 at 09:16:31AM -0700, tom@xxxxxxxxxxxx wrote:
Hi,
An upgrade from linux-5.9.16 to linux-5.10.4 results in lirc not
working
with my homebrew IR receiver. Running mode2 and pressing the same
button on
the IR remote shows timing differences:
5.9.16 works, first few lines of output:
pulse 2676
space 371
pulse 1429
space 371
pulse 827
space 372
pulse 1426
space 372
pulse 1425
space 376
pulse 1424
space 374
5.10.4 fail
pulse 2670
space 380
pulse 1428
space 372
pulse 827
pulse 125391 <---
space 127128 <---
pulse 1406
space 394
pulse 1407
pulse 125394 <---
space 126726 <---
pulse 1400
space 398
pulse 1406
space 394
pulse 801
The reporting of two pulses in a row as well as the large time
reported make
it so the button presses are not recognized.
Is this a known issue?
No, this is not known issue.
I am a software developer and would be happy to help in any way. I
can
gather more data or attempt to fix it myself.
Thanks for your bug report. In 5.10, there was a change which converted
the processing from nanoseconds to microsecondes, see:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=528222d853f9283110f0118dd71d9f0ad686d586
One issue has already been found in this change, which hasn't been
upstreamed
yet:
https://patchwork.linuxtv.org/project/linux-media/patch/20210105093023.5212-1-hias@xxxxxxxxx/
Would you mind testing this patch out please?
Admittedly I'm not convinced that this is the problem though. I'm not
sure
what is; the function frbwrite() contains two if statements to filter
out
noise, maybe something is wrong there. You could try by commenting
those
two if statements out and see if there is a problem there.
Your help is appreciated!
Thanks,
Sean
Hi Sean,
The patch fixes the problem I was seeing. I have tested both receive
and transmit on my homebrew IR, both are working.
Thanks, Tom
