On 2015-01-22 12:21, Gary Thomas wrote:
On 2015-01-22 12:05, Eric Nelson wrote:
On 01/22/2015 11:35 AM, Gary Thomas wrote:
On 2015-01-22 11:32, Nikolay Dimitrov wrote:
Hi Gary,
On 01/22/2015 03:24 PM, Gary Thomas wrote:
Are you using headphone or line-out?
My i.MX6 boards all suffer from this annoying pop - it would be great
to get to the bottom of this.
Before applying my ugly fix, I can hear the glitch on both outputs,
but need to warn you that my headphones test is flawed, as the
SGTL5000 codec on my board is improperly
connected to the headphones (audio output is only 2-wire DC-decoupled
instead of using 3-wire cap-less output with virtual ground).
Are you looking for a fix for line-out, headphones, both? Also, which
kernel are you using?
Currently, only headphones.
I'm using linux-boundary/3.10.31
Which has the SMALL_POP fix applied:
https://github.com/boundarydevices/linux-imx6/commit/983ce7a
Yes, but I still get them, so it's not 100% correct :-(
Also, Eric, is there anything magic about sound on the SabreLite? I know
I've had it working in the past, but today it's totally silent.
Nevermind - I rebuilt my image today and the sound is back.
That said, it brings up an interesting issue. I'm running the
same kernel on two i.MX6 boards - the SabreLite and one of my
company's internal design which is _almost_ identical. The SGTL5000
setup is identical. My SabreLite does not have a pop, but my other
board does. I wonder what could be the difference? They do have
slightly different i.MX6 silicon (not sure about the SGTL5000).
SabreLite = i.MX6Q rev 1.0, My board = i.MX6Q rev 1.2
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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