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