[alsa-devel] recording problem in beagleboard-mcbsp

[noman pouigt]

On Fri, Mar 27, 2015 at 1:24 PM, noman pouigt <variksla at gmail.com> wrote:
> Problem: not able to record with any of the devices
> in beagleboard-xm.
>
> Analysis: userspace is stuck in snd_pcm_readi function
> and kernel space i don't see snd_pcm_update_hw_ptr
> function being called.
>
> Checked the I2S clocks and they are perfect and recording
> data line is moving based on the data. I am able to do playback
> though.
>
> I am using below command to do recording. Do i need to add
> additional switches?
>
>
> Linux kernel: 3.19
>
> root at arm:~# arecord -t wav -c 2 -r 44100 -f S32_LE -v test.wav
> Recording WAVE 'test.wav' : Signed 32 bit Little Endian, Rate 44100 Hz, Stereo
> Plug PCM: Linear conversion PCM (S16_LE)
> Its setup is:
>   stream       : CAPTURE
>   access       : RW_INTERLEAVED
>   format       : S32_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 44100
>   exact rate   : 44100 (44100/1)
>   msbits       : 32
>   buffer_size  : 27560
>   period_size  : 5512
>   period_time  : 124988
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 5512
>   period_event : 0
>   start_threshold  : 1
>   stop_threshold   : 27560
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1806172160
> Slave: Hardware PCM card 0 'omap3beagle' device 0 subdevice 0
> Its setup is:
>   stream       : CAPTURE
>   access       : MMAP_INTERLEAVED
>   format       : S16_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 44100
>   exact rate   : 44100 (44100/1)
>   msbits       : 16
>   buffer_size  : 27560
>   period_size  : 5512
>   period_time  : 124988
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 5512
>   period_event : 0
>   start_threshold  : 1
>   stop_threshold   : 27560
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1806172160
>   appl_ptr     : 0
>   hw_ptr       : 0
>
> [   74.696319] omap-mcbsp 48074000.mcbsp: **** McBSP255 regs ****
> [   74.696380] omap-mcbsp 48074000.mcbsp: DRR2:  0xedd0abce
> [   74.696411] omap-mcbsp 48074000.mcbsp: DRR1:  0x0000
> [   74.696441] omap-mcbsp 48074000.mcbsp: DXR2:  0x0000
> [   74.696472] omap-mcbsp 48074000.mcbsp: DXR1:  0x0000
> [   74.696502] omap-mcbsp 48074000.mcbsp: SPCR2: 0x0230
> [   74.696533] omap-mcbsp 48074000.mcbsp: SPCR1: 0x0031
> [   74.696563] omap-mcbsp 48074000.mcbsp: RCR2:  0x8041
> [   74.696594] omap-mcbsp 48074000.mcbsp: RCR1:  0x0040
> [   74.696594] omap-mcbsp 48074000.mcbsp: XCR2:  0x8041
> [   74.696624] omap-mcbsp 48074000.mcbsp: XCR1:  0x0040
> [   74.696655] omap-mcbsp 48074000.mcbsp: SRGR2: 0x001f
> [   74.696685] omap-mcbsp 48074000.mcbsp: SRGR1: 0x0f00
> [   74.696716] omap-mcbsp 48074000.mcbsp: PCR0:  0x000f
>
>
> setup:
> beagleoboard-xm
> ubuntu distribution
> arecord used
> jaroslav recording application also tried
using max98090 codec and not using twl.