diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-06-22 15:06:00 +0200 |
|---|---|---|
| committer | Zoltan HERPAI <wigyori@uid0.hu> | 2016-06-22 15:06:00 +0200 |
| commit | 165abaf3bcd5ef731fc1e293171a8fea751dc769 (patch) | |
| tree | 0229370281acf62c118c00920b362eefd8a270fa /target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch | |
| parent | 1c225aa2bf9f64ad53db90cbebc5e1d45818655c (diff) | |
| download | master-187ad058-165abaf3bcd5ef731fc1e293171a8fea751dc769.tar.gz master-187ad058-165abaf3bcd5ef731fc1e293171a8fea751dc769.tar.bz2 master-187ad058-165abaf3bcd5ef731fc1e293171a8fea751dc769.zip | |
brcm2708: update linux 4.4 patches to latest version
As usual these patches were extracted from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y
Also alphabetically order sound-soc kernel packages.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch b/target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch new file mode 100644 index 0000000000..daea4dbc3f --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0327-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch @@ -0,0 +1,60 @@ +From ba4e2749004660d573c0d62f6fec876cd152bd3e Mon Sep 17 00:00:00 2001 +From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk> +Date: Fri, 6 May 2016 09:42:55 +0100 +Subject: [PATCH 327/381] Allow up to 24dB digital gain to be applied when + using IQAudIO DAC + +24db_digital_gain DT param can be used to specify that PCM512x +codec "Digital" volume control should not be limited to 0dB gain, +and if specified will allow the full 24dB gain. + +Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk> +--- + arch/arm/boot/dts/overlays/README | 17 +++++++++++++++-- + arch/arm/boot/dts/overlays/iqaudio-dac-overlay.dts | 6 +++++- + 2 files changed, 20 insertions(+), 3 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -490,8 +490,21 @@ Params: <None> + + Name: iqaudio-dac + Info: Configures the IQaudio DAC audio card +-Load: dtoverlay=iqaudio-dac +-Params: <None> ++Load: dtoverlay=iqaudio-dac,<param> ++Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec ++ Digital volume control. Enable with ++ "dtoverlay=iqaudio-dac,24db_digital_gain" ++ (The default behaviour is that the Digital ++ volume control is limited to a maximum of ++ 0dB. ie. it can attenuate but not provide ++ gain. For most users, this will be desired ++ as it will prevent clipping. By appending ++ the 24db_digital_gain parameter, the Digital ++ volume control will allow up to 24dB of ++ gain. If this parameter is enabled, it is the ++ responsibility of the user to ensure that ++ the Digital volume control is set to a value ++ that does not result in clipping/distortion!) + + + Name: iqaudio-dacplus +--- a/arch/arm/boot/dts/overlays/iqaudio-dac-overlay.dts ++++ b/arch/arm/boot/dts/overlays/iqaudio-dac-overlay.dts +@@ -30,10 +30,14 @@ + + fragment@2 { + target = <&sound>; +- __overlay__ { ++ frag2: __overlay__ { + compatible = "iqaudio,iqaudio-dac"; + i2s-controller = <&i2s>; + status = "okay"; + }; + }; ++ ++ __overrides__ { ++ 24db_digital_gain = <&frag2>,"iqaudio,24db_digital_gain?"; ++ }; + }; |