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diff --git a/docs/audio.txt b/docs/audio.txt deleted file mode 100644 index 158ad5d1..00000000 --- a/docs/audio.txt +++ /dev/null @@ -1,45 +0,0 @@ -Audio Support in IGT -==================== - -This document provides information and instructions about audio support in IGT. - -Introduction ------------- - -The audio test is aimed at testing the audio features of display connectors, -such as HDMI. - -Test setup ----------- - -The setup required for the audio test consists of using an HDMI-VGA adapter with -an audio-out 3.5 mm jack to extract the audio from the HDMI interface. -The audio-out jack is connected back to the device-under-test's line-in. - -Depending on the behavior of the adapter, it may be necessary to connect a -ghost VGA dongle to it (in order to emulate a connected display) to enable the -audio output. There are guides available detailing how to build these. - -When executed, the test will automatically send the test audio signal to all -ALSA audio HDMI outputs and record from the standard ALSA capture device. - -Configuration -------------- - -In order to deploy the test, ALSA controls have to be configured to set the -ALSA capture source to line-in. On Intel x86 systems, this can be achieved -with the following calls to the amixer utility: -# amixer sset Line 31 on -# amixer sset "Input Source" Line - -It is then useful to store the ALSA state permanently with the alsactl utility: -# alsactl store - -These settings can be restored with the alsactl utility: -# alsactl restore - -It is desirable to ensure that the alsa-restore and alsa-state systemd services -are enabled to do this job automatically, especially in the case of an -automated testing system: -# systemctl enable alsa-restore -# systemctl enable alsa-state |