The sii902x chip family supports also HDMI audio. Add binding for
describing the necessary i2s and mclk wiring for it.
Signed-off-by: Jyri Sarha <jsarha@xxxxxx>
---
.../bindings/display/bridge/sii902x.txt | 34 +++++++++++++++++++
include/dt-bindings/sound/sii902x-audio.h | 17 ++++++++++
2 files changed, 51 insertions(+)
create mode 100644 include/dt-bindings/sound/sii902x-audio.h
diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
index c4c1855ca654..977756841193 100644
--- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
+++ b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
@@ -8,6 +8,29 @@ Optional properties:
- interrupts: describe the interrupt line used to inform the host
about hotplug events.
- reset-gpios: OF device-tree gpio specification for RST_N pin.
+ - sil,i2s-fifo-routing: Array of exactly 4 integers indicating i2s
+ pins for audio fifo routing. First integer defines routing to
+ fifo 0 and second to fifo 1, etc. Integers can be filled with
+ definitions from: include/dt-bindings/sound/sii902x-audio.h
+ The available definitions are:
+ - ENABLE_BIT: enable this audio fifo
+ - CONNECT_SD#: route audio input from SD0, SD1, SD2, or SD3 i2s
+ data input pin
+ - LEFT_RIGHT_SWAP_BIT: swap i2s input channels for this fifo
+ I2S HDMI audio is configured only if this property is found.
+ - clocks: phandle mclk
+ - clock-names: "mclk"
+ Describes SII902x MCLK input. MCLK is used to produce
+ HDMI audio CTS values. This property is required if
+ "i2s-fifo-routing"-property is present. This property follows
+ Documentation/devicetree/bindings/clock/clock-bindings.txt
+ consumer binding.
+ - #sound-dai-cells = <0>: ASoC codec dai available for simple-card
+ If audio properties are present sii902x provides an ASoC
+ codec component driver that can be used by other ASoC
+ components like simple-card. See binding document for
+ details:
+ Documentation/devicetree/bindings/sound/simple-card.txt
Optional subnodes:
- video input: this subnode can contain a video input port node
@@ -21,6 +44,17 @@ Example:
compatible = "sil,sii9022";
reg = <0x39>;
reset-gpios = <&pioA 1 0>;
+
+ #sound-dai-cells = <0>;
+ sil,i2s-fifo-routing = <
+ (ENABLE_BIT|CONNECT_SD0)
+ 0
+ 0
+ 0
+ >;
+ clocks = <&mclk>;
+ clock-names = "mclk";
+
ports {
#address-cells = <1>;
#size-cells = <0>;
diff --git a/include/dt-bindings/sound/sii902x-audio.h b/include/dt-bindings/sound/sii902x-audio.h
new file mode 100644
index 000000000000..0a849904754b
--- /dev/null
+++ b/include/dt-bindings/sound/sii902x-audio.h
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@xxxxxx>
+ */
+
+#ifndef __DT_SII9022_AUDIO_H
+#define __DT_SII9022_AUDIO_H
+
+#define ENABLE_BIT 0x80
+#define CONNECT_SD0 0x00
+#define CONNECT_SD1 0x10
+#define CONNECT_SD2 0x20
+#define CONNECT_SD3 0x30
+#define LEFT_RIGHT_SWAP_BIT 0x04
+
+#endif /* __DT_SII9022_AUDIO_H */
--
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