On Thu, Nov 13, 2014 at 4:34 AM, Craig McQueen craig.mcqueen@beamcommunications.com wrote:
I'm testing the 3.18 kernel for i.MX28 EVK, which has an SGTL5000 CODEC. I notice that audio cannot be output at 8 kHz or 11.025 kHz, although the SGTL5000 data sheet table 8 indicates this should be possible.
If I try to play or record at 8 kHz or 11.025 kHz, I get an error message:
# aplay test_8k.wav [ 6168.910201] mxs_evk_startup: Skipped programming wolfson codec
Is this really a mainline kernel? I don't see any 'mxs_evk_startup' in mainline.
Playing WAVE 'test_8k.wav' : Signed 16 bit Little Endian, Rate 8000 Hz,Mono [ 6168.941211] sgtl5000 0-000a: Invalid mclk frequency: 4.096MHz [ 6168.947047] mxs-sgtl5000 sound.11: ASoC: machine hw_params failed: -22 aplay: set_params:1145: Unable to install hw params: ...
For an 8 kHz sample rate, I get
Invalid mclk frequency: 4.096MHz
I am not able to reproduce this bug here. I can play 8kHz file on the mx28evk:
root@freescale /home$ aplay mono_8k.wav Playing WAVE 'mono_8k.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono