Re: recording problem in beagleboard-mcbsp

noman pouigt
2015-03-31T18:41:50Z

On Fri, Mar 27, 2015 at 2:20 PM, noman pouigt <variksla@gmail.com> wrote:
> 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.
I was wondering if i can get some help in this?