BeagleBone Black Wireless no audio on HDMI, 4.9.45-ti-r57

[adrien.co...@gmail.com]

Hello,

I have been trying to enable the audio on my beaglebone wireless,

my main issue seems to be that the oscillator for the audio clock is off,

This is the GPIO1.27 of the processor, that activates it.

@RoberCNelson already helped by telling me that this pin is supposed to be off by the DTS file 

The thing is that I want to have my HDMI audio active (because i want to use the I2S).

Would someone know how to activate this?

- by loading some overlay

- or by adding a parameter to the kernel cmdline (tried hdmi.audio=1)

Thank you for your help in advance

PS my discussion with Robert is here https://github.com/RobertCNelson/bb.org-overlays/issues/20#issuecomment-346372802

Here are some important info about the platform status

os version

git:/opt/scripts/:[2ce750d881941c5189db9e189af90517e11c079f]

eeprom:[A335BNLTBWA51645BBWG0838]

dogtag:[BeagleBoard.org Debian Image 2017-08-31]

bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2017.09-rc2-00002-g7c9353]

bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2016.11-rc3-00002-g73df7f]

kernel:[4.9.45-ti-r57]

nodejs:[v6.11.2]

uboot_overlay_options:[enable_uboot_overlays=1]

uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo]

uboot_overlay_options:[enable_uboot_cape_universal=1]

pkg:[bb-cape-overlays]:[4.4.20170728.0-0rcnee1~stretch+20170728]

pkg:[bb-wl18xx-firmware]:[1.20170829-0rcnee1~stretch+20170829]

pkg:[firmware-ti-connectivity]:[20170823-1rcnee0~stretch+20170830]

pins status

audio osc enable                  27 fast    down 7 gpio 1.27 lo >>  clk_mcasp0 (mcasp0_pins)

P9.31 / hdmi audio clk           100 fast    down 0 asp 0 tx clk     mcasp@48038000 (mcasp0_pins)

P9.29 / hdmi audio fs            101 fast     up  0 asp 0 tx fs      mcasp@48038000 (mcasp0_pins)

P9.28 / hdmi audio data          103 fast    down 2 asp 0 data 2     mcasp@48038000 (mcasp0_pins)

P9.25 / audio osc                107 fast rx  up  0 asp 0 tx hclk    mcasp@48038000 (mcasp0_pins)

cape load at startup

[    2.899435] bone_capemgr bone_capemgr: Baseboard: 'A335BNLT,BWA5,1645BBWG0838'

[    2.899728] bone_capemgr bone_capemgr: compatible-baseboard=ti,beaglebone-black - #slots=4

[    2.928591] bone_capemgr bone_capemgr: slot #0: No cape found

[    2.959680] bone_capemgr bone_capemgr: slot #1: No cape found

[    2.992394] bone_capemgr bone_capemgr: slot #2: No cape found

[    3.025077] bone_capemgr bone_capemgr: slot #3: No cape found

[    3.030958] bone_capemgr bone_capemgr: initialized OK.

[    7.045527] systemd[1]: Set hostname to <beaglebone>.

aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: Black [TI BeagleBone Black], device 0: davinci-mcasp.0-hdmi-hifi.0 hdmi-hifi.0-0 []

  Subdevices: 1/1

  Subdevice #0: subdevice #0

xrandr --verbose

Screen 0: minimum 800 x 480, current 800 x 480, maximum 800 x 480