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7e567624dc
Register ASoC HDMI codec for audio functionality and adds device tree binding for audio configuration. With the registered HDMI codec the tda998x node can be used like a regular codec node in ASoC card configurations. HDMI audio info-frame and audio stream header is generated by the ASoC HDMI codec. The codec also applies constraints for available sample-rates based on Edid Like Data from the display. The device tree binding document has been updated [1]. Part of this patch has been inspired by Jean Francoise's "drm/i2c: tda998x: Add support of a DT graph of ports"-patch [2]. There may still be some identical lines left from the original patch and some of the ideas have come from there. [1] Documentation/devicetree/bindings/display/bridge/tda998x.txt [2] http://mailman.alsa-project.org/pipermail/alsa-devel/2015-July/095255.html Signed-off-by: Jyri Sarha <jsarha@ti.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
52 lines
1.4 KiB
Plaintext
52 lines
1.4 KiB
Plaintext
Device-Tree bindings for the NXP TDA998x HDMI transmitter
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Required properties;
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- compatible: must be "nxp,tda998x"
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- reg: I2C address
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Required node:
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- port: Input port node with endpoint definition, as described
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in Documentation/devicetree/bindings/graph.txt
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Optional properties:
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- interrupts: interrupt number and trigger type
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default: polling
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- pinctrl-0: pin control group to be used for
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screen plug/unplug interrupt.
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- pinctrl-names: must contain a "default" entry.
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- video-ports: 24 bits value which defines how the video controller
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output is wired to the TDA998x input - default: <0x230145>
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- audio-ports: array of 8-bit values, 2 values per one DAI[1].
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The first value defines the DAI type: TDA998x_SPDIF or TDA998x_I2S[2].
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The second value defines the tda998x AP_ENA reg content when the DAI
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in question is used. The implementation allows one or two DAIs. If two
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DAIs are defined, they must be of different type.
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[1] Documentation/sound/alsa/soc/DAI.txt
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[2] include/dt-bindings/display/tda998x.h
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Example:
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#include <dt-bindings/display/tda998x.h>
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tda998x: hdmi-encoder {
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compatible = "nxp,tda998x";
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reg = <0x70>;
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interrupt-parent = <&gpio0>;
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interrupts = <27 2>; /* falling edge */
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pinctrl-0 = <&pmx_camera>;
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pinctrl-names = "default";
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video-ports = <0x230145>;
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#sound-dai-cells = <2>;
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/* DAI-format AP_ENA reg value */
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audio-ports = < TDA998x_SPDIF 0x04
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TDA998x_I2S 0x03>;
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};
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