diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0323-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0323-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0323-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch b/target/linux/brcm2708/patches-4.4/0323-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch deleted file mode 100644 index 76b98a503d..0000000000 --- a/target/linux/brcm2708/patches-4.4/0323-Allow-up-to-24dB-digital-gain-to-be-applied-when-usi.patch +++ /dev/null @@ -1,60 +0,0 @@ -From f8abdaaf67f76c85eff5d5b2d38603b0dbaaf6be 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] 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?"; -+ }; - }; |