Hi All,

I get cherry trail tablet, and install ubuntu14.04.3, Kernel verison is 3.19. The table using rt5672 codec with no sound output in ubuntu, but it works in win8.

I get intel sst firmware fw_sst_22a8.bin from https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/tre e/intel

The driver load the firmware successfully and I change some alsa mixer items:

amixer -c0 sset 'codec_out0 mix 0 pcm0_in' on

amixer -c0 sset 'media0_out mix 0 media1_in' on

amixer -c0 sset 'media1_in Gain 0' 80%

amixer -c0 sset 'media1_in Gain 0 Ramp Delay' 50

amixer -c0 sset 'media1_in Gain 0' off

amixer -c0 sset 'pcm0_in Gain 0' 80%

amixer -c0 sset 'pcm0_in Gain 0 Ramp Delay' 50

amixer -c0 sset 'pcm0_in Gain 0' off

amixer -c0 sset 'codec_out0 Gain 0' 80%

amixer -c0 sset 'codec_out0 Gain 0 Ramp Delay' 50

amixer -c0 sset 'codec_out0 Gain 0' off

But there are some errors with dmesg:

[ 16.359646] Audio Port: ASoC: no backend DAIs enabled for Audio Port

…

[ 16.382156] sst-mfld-platform sst-mfld-platform: Enter: enable=0 port_name=ssp2-port

[ 16.383984] sst-mfld-platform sst-mfld-platform: Enter: enable=1 port_name=ssp2-port

[ 16.541809] intel_sst_acpi 808622A8:00: Alloc for str 1 pipe 0x90

[ 17.545512] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x2

[ 17.555207] intel_sst_acpi 808622A8:00: fw returned err -16

[ 18.605859] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3

[ 18.615908] intel_sst_acpi 808622A8:00: fw returned err -16

[ 19.621943] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x2 fw_state 0x3

[ 19.631499] intel_sst_acpi 808622A8:00: fw returned err -16

[ 20.637527] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x2 fw_state 0x3

[ 20.647083] intel_sst_acpi 808622A8:00: fw returned err -16

[ 20.682979] sst-mfld-platform sst-mfld-platform: Enter: enable=0 port_name=ssp2-port

[ 21.681280] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x2 fw_state 0x3

[ 21.690836] intel_sst_acpi 808622A8:00: fw returned err -16

[ 21.697087] intel_sst_acpi 808622A8:00: free stream returned err -19

[ 22.757082] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3

[ 22.766640] intel_sst_acpi 808622A8:00: fw returned err -16

[ 23.772867] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3

[ 23.782432] intel_sst_acpi 808622A8:00: fw returned err -16

[ 23.857938] sst-mfld-platform sst-mfld-platform: Enter: enable=1 port_name=ssp2-port

[ 23.989254] intel_sst_acpi 808622A8:00: Alloc for str 1 pipe 0x90

[ 23.989491] intel_sst_acpi 808622A8:00: FW sent error response 0x40034

[ 23.996864] intel_sst_acpi 808622A8:00: FW alloc failed ret -4

[ 24.003399] intel_sst_acpi 808622A8:00: sst_get_stream returned err -5

[ 24.010737] sst-mfld-platform sst-mfld-platform: ASoC: DAI prepare error: -5

[ 24.018652] Audio Port: ASoC: prepare FE Audio Port failed

[ 25.024622] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3

[ 25.034180] intel_sst_acpi 808622A8:00: fw returned err -16

[ 26.040399] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x1 fw_state 0x3

[ 26.049955] intel_sst_acpi 808622A8:00: fw returned err -16

[ 27.056333] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x2 fw_state 0x3

[ 27.065890] intel_sst_acpi 808622A8:00: fw returned err -16

[ 28.072032] intel_sst_acpi 808622A8:00: Wait timed-out condition:0x0, msg_id:0x2 fw_state 0x3

[ 28.081591] intel_sst_acpi 808622A8:00: fw returned err -16

[ 28.117427] Audio Port: sst: error code = -22

[ 28.122401] snd_pcm_update_hw_ptr0: 120 callbacks suppressed

[ 28.122409] cht-bsw-rt5672 cht-bsw-rt5672: BUG: , pos = -22, buffer size = 96000, period size = 48000

[ 28.132784] Audio Port: sst: error code = -22

[ 28.137749] cht-bsw-rt5672 cht-bsw-rt5672: BUG: , pos = -22, buffer size = 96000, period size = 48000

[ 28.372967] Audio Port: sst: error code = -22

[ 28.377946] cht-bsw-rt5672 cht-bsw-rt5672: BUG: , pos = -22, buffer size = 96000, period size = 48000

[ 28.388317] Audio Port: sst: error code = -22

[ 28.393289] cht-bsw-rt5672 cht-bsw-rt5672: BUG: , pos = -22, buffer size = 96000, period size = 48000

[ 28.403687] Audio Port: sst: error code = -22

lsmod info:

snd_soc_sst_cht_bsw_rt5672 16384 0

snd_intel_sst_acpi 16384 1

snd_intel_sst_core 73728 1 snd_intel_sst_acpi

snd_soc_sst_mfld_platform 77824 3 snd_intel_sst_core

snd_soc_rt5670 106496 1

snd_soc_rl6231 16384 1 snd_soc_rt5670

snd_soc_core 196608 4 snd_soc_rt5670,snd_soc_sst_cht_bsw_rt5672,snd_soc_sst_mfld_platform

snd_seq_midi 16384 0

snd_seq_midi_event 16384 1 snd_seq_midi

snd_compress 20480 1 snd_soc_core

snd_pcm_dmaengine 16384 1 snd_soc_core

snd_rawmidi 32768 1 snd_seq_midi

snd_pcm 106496 5 snd_soc_rt5670,snd_soc_core,snd_soc_sst_cht_bsw_rt5672,snd_soc_sst_mfld_plat form,snd_pcm_dmaengine

snd_seq 65536 2 snd_seq_midi_event,snd_seq_midi

snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi

snd_timer 32768 2 snd_pcm,snd_seq

snd 86016 10 snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_soc_sst_mfld_platform ,snd_seq_device,snd_compress

soundcore 16384 1 snd

I have no idea with the next step, so can anyone give a look?

Thanks

Tu