You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.9 KiB
Diff
83 lines
2.9 KiB
Diff
From 8f9baa887c3328ee17a78b05eba51af6c8ffc83e Mon Sep 17 00:00:00 2001
|
|
From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
|
|
Date: Sun, 29 May 2016 05:22:29 +0100
|
|
Subject: [PATCH] Add dt param to force HiFiBerry DAC+ Pro into slave mode
|
|
|
|
"dtoverlay=hifiberry-dacplus,slave"
|
|
|
|
Add 'slave' param to use HiFiBerry DAC+ Pro in slave mode,
|
|
with Pi as master for bit and frame clock.
|
|
|
|
Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
|
|
---
|
|
arch/arm/boot/dts/overlays/README | 2 ++
|
|
arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts | 6 ++++--
|
|
sound/soc/bcm/hifiberry_dacplus.c | 10 ++++++++--
|
|
3 files changed, 14 insertions(+), 4 deletions(-)
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -344,6 +344,8 @@ Params: 24db_digital_gain Allow ga
|
|
responsibility of the user to ensure that
|
|
the Digital volume control is set to a value
|
|
that does not result in clipping/distortion!)
|
|
+ slave Force DAC+ Pro into slave mode, using Pi as
|
|
+ master for bit clock and frame clock.
|
|
|
|
|
|
Name: hifiberry-digi
|
|
--- a/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
|
|
+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
|
|
@@ -41,7 +41,7 @@
|
|
|
|
fragment@3 {
|
|
target = <&sound>;
|
|
- frag3: __overlay__ {
|
|
+ hifiberry_dacplus: __overlay__ {
|
|
compatible = "hifiberry,hifiberry-dacplus";
|
|
i2s-controller = <&i2s>;
|
|
status = "okay";
|
|
@@ -49,6 +49,8 @@
|
|
};
|
|
|
|
__overrides__ {
|
|
- 24db_digital_gain = <&frag3>,"hifiberry,24db_digital_gain?";
|
|
+ 24db_digital_gain =
|
|
+ <&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
|
|
+ slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
|
|
};
|
|
};
|
|
--- a/sound/soc/bcm/hifiberry_dacplus.c
|
|
+++ b/sound/soc/bcm/hifiberry_dacplus.c
|
|
@@ -47,6 +47,7 @@ struct pcm512x_priv {
|
|
/* Clock rate of CLK48EN attached to GPIO3 pin */
|
|
#define CLK_48EN_RATE 24576000UL
|
|
|
|
+static bool slave;
|
|
static bool snd_rpi_hifiberry_is_dacpro;
|
|
static bool digital_gain_0db_limit = true;
|
|
|
|
@@ -145,8 +146,11 @@ static int snd_rpi_hifiberry_dacplus_ini
|
|
struct snd_soc_codec *codec = rtd->codec;
|
|
struct pcm512x_priv *priv;
|
|
|
|
- snd_rpi_hifiberry_is_dacpro
|
|
- = snd_rpi_hifiberry_dacplus_is_pro_card(codec);
|
|
+ if (slave)
|
|
+ snd_rpi_hifiberry_is_dacpro = false;
|
|
+ else
|
|
+ snd_rpi_hifiberry_is_dacpro =
|
|
+ snd_rpi_hifiberry_dacplus_is_pro_card(codec);
|
|
|
|
if (snd_rpi_hifiberry_is_dacpro) {
|
|
struct snd_soc_dai_link *dai = rtd->dai_link;
|
|
@@ -314,6 +318,8 @@ static int snd_rpi_hifiberry_dacplus_pro
|
|
|
|
digital_gain_0db_limit = !of_property_read_bool(
|
|
pdev->dev.of_node, "hifiberry,24db_digital_gain");
|
|
+ slave = of_property_read_bool(pdev->dev.of_node,
|
|
+ "hifiberry-dacplus,slave");
|
|
}
|
|
|
|
ret = snd_soc_register_card(&snd_rpi_hifiberry_dacplus);
|