Simple-Card:
-Simple-Card specifies audio DAI connection of SoC <-> codec.
+Simple-Card specifies audio DAI connections of SoC <-> codec.
Required properties:
Optional properties:
-- simple-audio-card,format : CPU/CODEC common audio format.
- "i2s", "right_j", "left_j" , "dsp_a"
- "dsp_b", "ac97", "pdm", "msb", "lsb"
+- simple-audio-card,name : User specified audio sound card name, one string
+ property.
+- simple-audio-card,widgets : Please refer to widgets.txt.
- simple-audio-card,routing : A list of the connections between audio components.
Each entry is a pair of strings, the first being the
connection's sink, the second being the connection's
source.
+- simple-audio-card,mclk-fs : Multiplication factor between stream rate and codec
+ mclk.
+
+Optional subnodes:
+
+- simple-audio-card,dai-link : Container for dai-link level
+ properties and the CPU and CODEC
+ sub-nodes. This container may be
+ omitted when the card has only one
+ DAI link. See the examples and the
+ section bellow.
+
+Dai-link subnode properties and subnodes:
-Required subnodes:
+If dai-link subnode is omitted and the subnode properties are directly
+under "sound"-node the subnode property and subnode names have to be
+prefixed with "simple-audio-card,"-prefix.
-- simple-audio-card,cpu : CPU sub-node
-- simple-audio-card,codec : CODEC sub-node
+Required dai-link subnodes:
+
+- cpu : CPU sub-node
+- codec : CODEC sub-node
+
+Optional dai-link subnode properties:
+
+- format : CPU/CODEC common audio format.
+ "i2s", "right_j", "left_j" , "dsp_a"
+ "dsp_b", "ac97", "pdm", "msb", "lsb"
+- frame-master : Indicates dai-link frame master.
+ phandle to a cpu or codec subnode.
+- bitclock-master : Indicates dai-link bit clock master.
+ phandle to a cpu or codec subnode.
+- bitclock-inversion : bool property. Add this if the
+ dai-link uses bit clock inversion.
+- frame-inversion : bool property. Add this if the
+ dai-link uses frame clock inversion.
+
+For backward compatibility the frame-master and bitclock-master
+properties can be used as booleans in codec subnode to indicate if the
+codec is the dai-link frame or bit clock master. In this case there
+should be no dai-link node, the same properties should not be present
+at sound-node level, and the bitclock-inversion and frame-inversion
+properties should also be placed in the codec node if needed.
Required CPU/CODEC subnodes properties:
Optional CPU/CODEC subnodes properties:
-- format : CPU/CODEC specific audio format if needed.
- see simple-audio-card,format
-- frame-master : bool property. add this if subnode is frame master
-- bitclock-master : bool property. add this if subnode is bitclock master
-- bitclock-inversion : bool property. add this if subnode has clock inversion
-- frame-inversion : bool property. add this if subnode has frame inversion
+- dai-tdm-slot-num : Please refer to tdm-slot.txt.
+- dai-tdm-slot-width : Please refer to tdm-slot.txt.
- clocks / system-clock-frequency : specify subnode's clock if needed.
it can be specified via "clocks" if system has
clock node (= common clock), or "system-clock-frequency"
(if system doens't support common clock)
-Example:
+Example 1 - single DAI link:
sound {
compatible = "simple-audio-card";
+ simple-audio-card,name = "VF610-Tower-Sound-Card";
simple-audio-card,format = "left_j";
- simple-audio-routing =
- "MIC_IN", "Mic Jack",
+ simple-audio-card,bitclock-master = <&dailink0_master>;
+ simple-audio-card,frame-master = <&dailink0_master>;
+ simple-audio-card,widgets =
+ "Microphone", "Microphone Jack",
+ "Headphone", "Headphone Jack",
+ "Speaker", "External Speaker";
+ simple-audio-card,routing =
+ "MIC_IN", "Microphone Jack",
"Headphone Jack", "HP_OUT",
- "Ext Spk", "LINE_OUT";
+ "External Speaker", "LINE_OUT";
simple-audio-card,cpu {
sound-dai = <&sh_fsi2 0>;
};
- simple-audio-card,codec {
+ dailink0_master: simple-audio-card,codec {
sound-dai = <&ak4648>;
- bitclock-master;
- frame-master;
clocks = <&osc>;
};
};
interrupt-parent = <&gic>;
interrupts = <0 146 0x4>;
};
+
+Example 2 - many DAI links:
+
+sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "Cubox Audio";
+
+ simple-audio-card,dai-link@0 { /* I2S - HDMI */
+ format = "i2s";
+ cpu {
+ sound-dai = <&audio1 0>;
+ };
+ codec {
+ sound-dai = <&tda998x 0>;
+ };
+ };
+
+ simple-audio-card,dai-link@1 { /* S/PDIF - HDMI */
+ cpu {
+ sound-dai = <&audio1 1>;
+ };
+ codec {
+ sound-dai = <&tda998x 1>;
+ };
+ };
+
+ simple-audio-card,dai-link@2 { /* S/PDIF - S/PDIF */
+ cpu {
+ sound-dai = <&audio1 1>;
+ };
+ codec {
+ sound-dai = <&spdif_codec>;
+ };
+ };
+};
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff