Show pageOld revisionsBacklinksExport to PDFFold/unfold allBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Lineout Audio (J4) ====== <WRAP round important> This functionality is available on Ubuntu. * Linux kernel version should be 4.9.230-35 (Aug 27, 2020) or higher. * The Linux kernel must support Device Tree overlays. That has been supported since linux 4.9.230-35. </WRAP> ==== Hardware connection ==== {{:odroid-c4:application_note:external_connector:odroid-c4wj4pic.jpg?600|}} === Connection Diagram === {{:odroid-c4:application_note:external_connector:odroid-c4wj4.jpg?600|}} ==== Enable line-out device tree overlay ==== When the hardware is ready, you need to enable the device tree by editing the config.ini file.\\ Check the link below for the description of Device Tree Overlay in ODROID-C4.\\ [[common:application_note:software:device_tree_overlay|Device Tree Overlay]] == Edit config.ini file == This is the DTBO part of the config.ini file of Odroid-C4. <code ini> ; Device Tree Overlay overlay_resize=16384 overlay_profile= overlays="spi0 i2c0 i2c1 uart0" [overlay_custom] overlays="i2c0 i2c1" [overlay_hktft32] overlays="hktft32" [overlay_hktft35] overlays="hktft35" </code> Add a lineout profile and put the profile name (lineout) in the overlay_profile variable. <code ini> ; Device Tree Overlay overlay_resize=16384 overlay_profile=lineout overlays="spi0 i2c0 i2c1 uart0" [overlay_custom] overlays="i2c0 i2c1" [overlay_hktft32] overlays="hktft32" [overlay_hktft35] overlays="hktft35" [overlay_lineout] overlays="lineout" </code> Save the config.ini file and reboot. <code bash target> root@odroid:~# reboot </code> You can see that the sound card is enabled. <code bash target> root@odroid:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ODROIDHDMI [ODROID-HDMI], device 0: SPDIF-dit-hifi dit-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: ODROIDLINEOUT [ODROID-LINEOUT], device 0: TDM-C-T9015-audio-hifi T9015-audio-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 root@odroid:~# </code> odroid-c4/application_note/external_connector/lineout.txt Last modified: 2020/09/07 12:20by ck.kim