ALSA DMA or ISA not working on IMX6Q

[johnturnur]

hi,

We are having a hardware with IMX6Q and TAS5706 audio amplifier chip.

Its configuration is different than standard SABRE SD board.

I have written a driver which works with ALSA.

I am able to communicat IC with I2C commands.

But i am not able to tranfer data .

getting follwoing error

"playback write error (DMA or IRQ trouble?)"

"aplay: pcm_write"

"write error: I/O error"

At this time state is in SNDRV_PCM_STATE_RUNNING.

Thanks,

[fabio_estevam]

Which kernel version are you using? Have you loaded the SDMA firmware?

[johnturnur]

Hi,

Fabio

I am using SDMA firmware 1.1.

Thanks

[johnturnur]

hi

Any input on this issue?

[johnturnur]

I am using ANDROID 13.4.1 ICS code only and I have modified it for our custome hardware.

my board confing file is the same as imx6, its should load the default SDMA firmware.

Thanks for this information.

[lily_zhang]

hello, John:

Besides AUDMUX pin configuration, please also check mxc_audio_platform_data configurations in your board files.

[johnturnur]

Hi,

My here is my mxc_audio_platform_data

static struct mxc_audio_platform_data tas5706_data = {

.ssi_num = 1,

.src_port = 2,

.ext_port = 6,

// .hp_gpio = SABRESD_HEADPHONE_DET,

.hp_active_low = 1,

// .mic_gpio = SABRESD_MICROPHONE_DET,

.mic_active_low = 1,

.init = mxc_tas5706b_init,

.clock_enable = tas5706b_clk_enable,

};

And my debug log which can give you some information:

alsa_aplay youcantdothat_44s.wav                          
snd_pcm_playback_open
snd_pcm_open
snd_pcm_open_file
imx_ssi_startup
snd_imx_open
imx_hifi_startup IN
tas5706b_clk_enable
imx_hifi_startup OUT
snd_pcm_hw_constraints_complete
snd_pcm_mmap
Playing WAVE 'youcantdothat_44s.wpdata snd_pcm_lib_ioctl_fifo_size fifosize =16 width 0, ch 2
av' : Signed 16 bit Little Endianpdata snd_pcm_lib_ioctl_fifo_size fifosize =16 width 0, ch 2
, Rate 44100 Hz, Stereo
pdata snd_pcm_lib_ioctl_fifo_size fifosize =16 width 0, ch 2
pdata snd_pcm_lib_ioctl_fifo_size fifosize =16 width 0, ch 2
imx_hifi_hw_params IN

tas5706_set_dai_fmt SND_SOC_DAIFMT_CBM_CFM
tas5706_set_dai_fmt SND_SOC_DAIFMT_I2S
tas5706_set_dai_fmt SND_SOC_DAIFMT_NB_NF
for_debug Has removed tas5706_set_dai_fmtimx_ssi_set_dai_tdm_slot
imx_ssi_set_dai_fmt
imx_ssi_set_dai_fmt SND_SOC_DAIFMT_I2S

for_debug Has removed tas5706_set_fll
for_debug Has removed tas5706_set_dai_sysclkimx_hifi_hw_params OUT

tas5706_hw_params tas5706->lrclk 44100

tas5706_hw_params SNDRV_PCM_FORMAT_S16_LE

tas5706_hw_params error Register = 255imx_ssi_hw_params
snd_soc_dai_set_dma_data  SNDRV_PCM_STREAM_PLAYBACK
imx_ssi_hw_params SNDRV_PCM_FORMAT_S16_LE
snd_imx_pcm_hw_params
imx_ssi_dma_alloc
filter
snd_pcm_prepare
snd_pcm_action_single in
snd_imx_pcm_prepare

for_debug Has removed tas5706_set_bias_level
snd_pcm_action_single out
snd_pcm_prepare out 0
snd_pcm_lib_write
snd_pcm_lib_write_transfer IN
COPYFRM IN
COPYFRM OUT
snd_pcm_lib_write_transfer OUT
snd_pcm_update_state
snd_pcm_lib_write
snd_pcm_lib_write_transfer IN
COPYFRM IN
COPYFRM OUT
snd_pcm_lib_write_transfer OUT
snd_pcm_update_state
snd_pcm_lib_write
snd_pcm_lib_write_transfer IN
COPYFRM IN
COPYFRM OUT
snd_pcm_lib_write_transfer OUT
snd_pcm_update_state
snd_pcm_lib_write
snd_pcm_lib_write_transfer IN
COPYFRM IN
COPYFRM OUT
snd_pcm_lib_write_transfer OUT
snd_pcm_action in
snd_pcm_action_single in
snd_pcm_do_start
snd_imx_pcm_trigger
imx_ssi_trigger
snd_pcm_post_start IN
snd_pcm_post_start NOTI TIME IN
snd_pcm_post_start NOTI TIME OUT
snd_pcm_post_start OUT
snd_pcm_action_single out
snd_pcm_action OUT 0
snd_pcm_update_state
snd_pcm_lib_write
snd_pcm_update_hw_ptr
snd_pcm_update_hw_ptr0
snd_imx_pcm_pointer
snd_imx_pcm_pointer: 0 0
state 3 wait_time = 1000
perror playback write error (DMA or IRQ trouble?)
aplay: pcm_write:1604: snd_pcm_action in
snd_pcm_action_single in
write error: I/O error
snd_imx_pcm_trigger
imx_ssi_trigger
snd_pcm_action_single out
snd_pcm_action OUT 0
snd_imx_pcm_hw_free
snd_pcm_release
snd_imx_pcm_hw_free
imx_ssi_shutdown
imx_hifi_shutdown IN
tas5706b_clk_enable
imx_hifi_shutdown OUT
snd_imx_close

[JerryFan]

I guess you connected the TAS5706 with i.MX6Q using ESAI bus, right? AndTAS5706 is the bus master or slave(the bus master supplies the bit/frame clock)? And if TAS5706 is the master, please probe the bit/frame clock to make sure they are OK. The ESAI within i.MX6Q can not transfer any data without the bit/frame clock when it is in slave mode.

[johnturnur]

Hi,

Thanks for your reply

We have connected throught I2S on AUD6. IMX6 provides all clocking source to the TAS5706.

TAS5706 is a slave device.

I have configured the

   MX6Q_PAD_DI0_PIN2__AUDMUX_AUD6_TXD,     /* AUD6_TXD     */
    MX6Q_PAD_DI0_PIN3__AUDMUX_AUD6_TXFS,    /* AUD6_TXFS    */
    MX6Q_PAD_DI0_PIN15__AUDMUX_AUD6_TXC,    /* AUD6_TXC     */

What else settings are required on IMX6Q side and  TAS5706 audio driver side?

Thanks

[JerryFan]

So the playback hang or no music can be heard? Please probe the TXFS and TXC firstly when playing .

[johnturnur]

Thansk for your information. I will try.

No music comes out, and I think i wait for the DMA.

Following is my log for alsa_aplay -Dplughw:0,0 -v 1.wav, Any clue for this log.

Plug PCM:

Hardware PCM card 0 'o' device 0 subdevice 0

Its setup is:

  stream       : PLAYBACK

  access       : RW_INTERLEAVED

  format       : S16_LE

  subformat    : STD

  channels     : 2

  rate         : 44100

  exact rate   : 44100 (44100/1)

  msbits       : 16

  buffer_size  : 22052

  period_size  : 5513

  period_time  : 125011

  tstamp_mod   : NONE

  period_step  : 1

  avail_min    : 5513

  period_event : 0

  start_threshold  : 22052

  stop_threshold   : 22052

  silence_threshold: 0

  silence_ssize : 0

  boundary     : 1445199872

  appl_ptr     : 0

  hw_ptr       : 0