On 2015-01-21 17:00, Fabio Estevam wrote:
Hi Nikolay,
On Wed, Jan 21, 2015 at 9:55 PM, Nikolay Dimitrov <[email protected]> wrote:
Hehe, I'm not sure that you cleared the bit actually :). I think that
with mask 0 you're not writing to the I2C reg at all - you can check
the return value of snd_soc_update_bits(), should be 0 (no error, no
value changed). But would be great if you can also monitor the I2C bus
traffic to confirm whether you really write or not to this register.
Can you try to change only the last argument and hear whether it makes
a difference, like this:
snd_soc_update_bits(codec, SGTL5000_CHIP_REF_CTRL, 1, 1);
snd_soc_update_bits(codec, SGTL5000_CHIP_REF_CTRL, 1, 0);
My tests show the following:
- With SMALL_POP 0 (no click)
- With SMALL_POP 1 (click)
Yes, this sounds strange. With my patch applied we end up with
SMALL_POP 0 (default value) and I don't hear the click on mx28evk nor
mx53qsb.
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.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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