[alsa-devel] [PATCH 1/5] ASoC: samsung: odroid: Fix 32000 sample rate handling

[Krzysztof Kozlowski]

On Wed, Mar 14, 2018 at 5:41 PM, Sylwester Nawrocki
<s.nawrocki at samsung.com> wrote:
> In case of sample rates lower than 44100 currently there is too low MCLK
> frequency set for the CODEC. Playback fails with following errors:
>
> $ speaker-test -c2 -t sine -f 1500 -l2 -r 32000
>
> Sine wave rate is 1500.0000Hz
> Rate set to 32000Hz (requested 32000Hz)
> Buffer size range from 128 to 131072
> Period size range from 64 to 65536
> Using max buffer size 131072
> Periods = 4
> Unable to set hw params for playback: Invalid argument
> Setting of hwparams failed: Invalid argument
>
> [  497.883700] max98090 1-0010: Invalid master clock frequency
>
> To fix this the I2S root clock's frequency is increased, depending
> on sampling rate.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
> ---
>  sound/soc/samsung/odroid.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)

Acked-by: Krzysztof Kozlowski <krzk at kernel.org>

Best regards,
Krzysztof