From a4353c83a2d230d0992feedbf462cc243ab37126 Mon Sep 17 00:00:00 2001 From: Andrew Geissler Date: Fri, 25 Jun 2021 14:23:27 -0500 Subject: meta-raspberrypi: subtree update:ffc402ef5e..17b56ab075 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Andreas Müller (1): pi-bluetooth: upgrade 0.1.12 -> 0.1.17 Devendra Tewari (1): Add WM8960 soundcard support Paul Barker (1): rpi-cmdline: Package is machine-specific Pierre-Jean Texier (1): kas: remove 'image-mklibs' from USER_CLASSES list Signed-off-by: Andrew Geissler Change-Id: I08366a667f191efd45b717be5bd530ae1af782b5 --- meta-raspberrypi/docs/extra-build-config.md | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'meta-raspberrypi/docs') diff --git a/meta-raspberrypi/docs/extra-build-config.md b/meta-raspberrypi/docs/extra-build-config.md index 1caf904fd..ec3bd6ab8 100644 --- a/meta-raspberrypi/docs/extra-build-config.md +++ b/meta-raspberrypi/docs/extra-build-config.md @@ -349,3 +349,24 @@ Also, this will enable adding Contiguous Memory Allocation value in the cmdline. Ref.: * * + +## WM8960 soundcard support + +Support for WM8960 based sound cards such as the WM8960 Hi-Fi Sound Card HAT for Raspberry Pi from Waveshare, and ReSpeaker 2 / 4 / 6 Mics Pi HAT from Seeed Studio, can be enabled in `local.conf` + + ```conf + MACHINE_FEATURES += "wm8960" + ``` + +You may need to adjust volume and toggle switches that are off by default + + ```bash + amixer -c1 sset 'Headphone',0 80%,80% + amixer -c1 sset 'Speaker',0 80%,80% + amixer -c1 sset 'Left Input Mixer Boost' toggle + amixer -c1 sset 'Left Output Mixer PCM' toggle + amixer -c1 sset 'Right Input Mixer Boost' toggle + amixer -c1 sset 'Right Output Mixer PCM' toggle + ``` + +Audio capture on ReSpeaker 2 / 4 / 6 Mics Pi HAT from Seeed Studio is very noisy. -- cgit v1.2.3