Re: pi zero w as tramsitter

On Sun, Aug 30, 2020 at 04:30:51PM +0200, [email protected] wrote:
> On Sat, 29 Aug 2020, Sean Young wrote:
> > On Sat, Aug 29, 2020 at 06:10:28PM +0200, grumpy--- via LIRC-list wrote:
> > > for a couple of years i have used a pi zero w with a tsal6400 led to control devices
> > > i've had no problems until recently
> > > i purchased a no brand name hdmi switcher
> > > i recorded the remote but the pi zero w refused to control the device
> > > just as a test i plugged the led into a pi3
> > > it worked great talk'n to the switcher
> > > the pi zero w and the pi3 have the same version of raspbian
> > > they both use the same version of lirc and the same config files
> > > the led is driven by a transistor that is powered external to the pi's
> > > has anyone experienced this behavior before
> > 
> > So it would be useful to know what driver your are using for IR, i.e.
> > is it lirc_rpi, or gpio-ir-tx? What version of raspbian are you using?
> > 
> > One explanation is that the gpio-ir-tx driver has flaws which have only
> > recently been fixed:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/media/rc/gpio-ir-tx.c?id=ea8912b788f8144e7d32ee61e5ccba45424bef83
> > 
> > The problems fixed by this patch certainly can be affected by a slower CPU.
> > 
> > It would be good to know if this fixes your problems by compiling your
> > kernel with this patch.
> > 
> > Thanks
> > Sean
> > 
> 
> BINGO!!!

So does this patch fix your issue? If so, I'll ask for it to be included
in earlier stable kernels.

Thanks

Sean