Re: recording problem in beagleboard-mcbsp

noman pouigt
2015-03-27T21:20:32Z

On Fri, Mar 27, 2015 at 1:24 PM, noman pouigt <variksla@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@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.