Hi,

I've an baytrail / Z3735F based HDMI Stick "Orbsmart AW-01", but sound does not work.

I'm a little lost finding out what is missing / required to make it work.

I compiled an 4.3-rc2 vanilla kernel with hopefully each and everything turned on relating soc/sound.

In dmesg I get:

[...] [ 4.252522] sst-acpi 80860F28:00: No matching ASoC machine driver found [ 5.863177] intel_sst_acpi 80860F28:00: No matching machine driver found [...]

It looks like there is rt5640 based sound recognized:

[ml@orb ~]$ find /sys -name '*5640*' -print /sys/bus/i2c/drivers/rt5640 /sys/bus/acpi/devices/10EC5640:00 /sys/bus/acpi/devices/10EC5640:01 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/80860F41:01/10EC5640:00 /sys/devices/LNXSYSTM:00/LNXSYBUS:00/80860F41:01/10EC5640:01 find: "/sys/kernel/debug": Keine Berechtigung /sys/module/i2c_core/holders/snd_soc_rt5640 /sys/module/snd_soc_rl6231/holders/snd_soc_rt5640 /sys/module/snd_soc_rt5640 /sys/module/snd_soc_rt5640/drivers/i2c:rt5640 /sys/module/snd_soc_core/holders/snd_soc_rt5640 /sys/module/regmap_i2c/holders/snd_soc_rt5640 /sys/module/snd_pcm/holders/snd_soc_rt5640 [ml@orb ~]$

This are the sound related modules loaded:

[ml@orb ~]$ lsmod|grep snd snd_intel_sst_acpi 16384 0 snd_intel_sst_core 65536 1 snd_intel_sst_acpi snd_soc_rt5640 106496 0 snd_soc_sst_mfld_platform 73728 1 snd_intel_sst_core snd_soc_rl6231 16384 1 snd_soc_rt5640 snd_soc_core 155648 2 snd_soc_rt5640,snd_soc_sst_mfld_platform snd_compress 20480 1 snd_soc_core regmap_i2c 16384 1 snd_soc_rt5640 snd_pcm_dmaengine 16384 1 snd_soc_core ac97_bus 16384 1 snd_soc_core snd_pcm 86016 4 snd_soc_rt5640,snd_soc_core,snd_soc_sst_mfld_platform,snd_pcm_dmaengine snd_timer 28672 1 snd_pcm snd 65536 5 snd_soc_core,snd_timer,snd_pcm,snd_soc_sst_mfld_platform,snd_compress soundcore 16384 1 snd i2c_core 49152 7 drm,i915,snd_soc_rt5640,i2c_designware_platform,regmap_i2c,drm_kms_helper,i2c_algo_bit snd_soc_sst_acpi 16384 0 [ml@orb ~]$