[alsa-devel] Error with "Unsigned 8 bit, Rate 8000 Hz, Mono" track
Hi,
Running 3.6-rc1 on a mx28evk I get the following error with this wav format:
root@freescale /home$ aplay k3b_error1.wav Playing WAVE 'k3b_error1.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono [ 303.640000] asoc: machine hw_params failed: -22 aplay: set_params:959: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: U8 SUBFORMAT: STD SAMPLE_BITS: 8 FRAME_BITS: 8 CHANNELS: 1 RATE: 8000 PERIOD_TIME: 125000 PERIOD_SIZE: 1000 PERIOD_BYTES: 1000 PERIODS: 4 BUFFER_TIME: 500000 BUFFER_SIZE: 4000 BUFFER_BYTES: 4000 TICK_TIME: 0
Haven't started debugging yet, but if anyone sees something obvious, please let me know.
This same file plays correctly on mx31/mx27/mx51/mx6q boards.
Regards,
Fabio Estevam
On Fri, Aug 10, 2012 at 12:25:13PM +0800, Fabio Estevam wrote:
Hi,
Running 3.6-rc1 on a mx28evk I get the following error with this wav format:
root@freescale /home$ aplay k3b_error1.wav Playing WAVE 'k3b_error1.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono [ 303.640000] asoc: machine hw_params failed: -22
It failed at here: /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */ if (mclk < 8000000 || mclk > 27000000) return -EINVAL;
Since sgtl5000 on slave mode, the mclk can only be 256*fs, 384*fs, 512*fs, the maximum mclk of 8Khz 4096000(512 * 8000) < 8Mhz, it does not meet the minimum clock requirement of mclk. It looks like hw limitation on slave mode.
Will spend some time double check if any solution for this later. If anyone else know it, please share the comments.
Regards Dong Aisheng
aplay: set_params:959: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: U8 SUBFORMAT: STD SAMPLE_BITS: 8 FRAME_BITS: 8 CHANNELS: 1 RATE: 8000 PERIOD_TIME: 125000 PERIOD_SIZE: 1000 PERIOD_BYTES: 1000 PERIODS: 4 BUFFER_TIME: 500000 BUFFER_SIZE: 4000 BUFFER_BYTES: 4000 TICK_TIME: 0
Haven't started debugging yet, but if anyone sees something obvious, please let me know.
This same file plays correctly on mx31/mx27/mx51/mx6q boards.
Regards,
Fabio Estevam
On Fri, Aug 10, 2012 at 07:00:05PM +0800, Dong Aisheng wrote:
Since sgtl5000 on slave mode, the mclk can only be 256*fs, 384*fs, 512*fs, the maximum mclk of 8Khz 4096000(512 * 8000) < 8Mhz, it does not meet the minimum clock requirement of mclk. It looks like hw limitation on slave mode.
Will spend some time double check if any solution for this later. If anyone else know it, please share the comments.
The CODEC driver ought to be setting a constraint for this if there's no way it can support 8kHz in slave mode.
On Fri, Aug 10, 2012 at 07:31:09PM +0800, Mark Brown wrote:
On Fri, Aug 10, 2012 at 07:00:05PM +0800, Dong Aisheng wrote:
Since sgtl5000 on slave mode, the mclk can only be 256*fs, 384*fs, 512*fs, the maximum mclk of 8Khz 4096000(512 * 8000) < 8Mhz, it does not meet the minimum clock requirement of mclk. It looks like hw limitation on slave mode.
Will spend some time double check if any solution for this later. If anyone else know it, please share the comments.
The CODEC driver ought to be setting a constraint for this if there's no way it can support 8kHz in slave mode.
Yes, it's true. I will check it when have time.
Regards Dong Aisheng
On 8/10/12, Dong Aisheng b29396@freescale.com wrote:
On Fri, Aug 10, 2012 at 12:25:13PM +0800, Fabio Estevam wrote:
Hi,
Running 3.6-rc1 on a mx28evk I get the following error with this wav format:
root@freescale /home$ aplay k3b_error1.wav Playing WAVE 'k3b_error1.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono [ 303.640000] asoc: machine hw_params failed: -22
It failed at here: /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */ if (mclk < 8000000 || mclk > 27000000) return -EINVAL;
Since sgtl5000 on slave mode, the mclk can only be 256*fs, 384*fs, 512*fs, the maximum mclk of 8Khz 4096000(512 * 8000) < 8Mhz, it does not meet the minimum clock requirement of mclk. It looks like hw limitation on slave mode.
I can play this file on a mx51evk and mx6qsabrelite boards, which also uses a sgtl5000.
So it looks like a mxs issue, right?
Thanks,
Fabio Estevam
On 8/10/12, Fabio Estevam festevam@gmail.com wrote:
I can play this file on a mx51evk and mx6qsabrelite boards, which also uses a sgtl5000.
Ok, these boards have sgtl5000 in master mode.
Only on mx28evk we have sgtl5000 in slave mode.
participants (3)
-
Dong Aisheng -
Fabio Estevam -
Mark Brown