[PATCH] ASoC: dt-bindings: q6asm: Add Q6ASM_DAI_{TX_RX, TX, RX} defines

[Stephan Gerhold <stephan@gerhold.net>]

Right now the direction of a DAI has to be specified as a literal
number in the device tree, e.g.:

	dai@0 {
		reg = <0>;
		direction = <2>;
	};

but this does not make it immediately clear that this is a
playback/RX-only DAI.

Actually, q6asm-dai.c has useful defines for this. Move them to the
dt-bindings header to allow using them in the dts(i) files.
The example above then becomes:

	dai@0 {
		reg = <0>;
		direction = <Q6ASM_DAI_RX>;
	};

which is immediately recognizable as playback/RX-only DAI.

Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
 Documentation/devicetree/bindings/sound/qcom,q6asm.txt | 9 +++++----
 include/dt-bindings/sound/qcom,q6asm.h                 | 4 ++++
 sound/soc/qcom/qdsp6/q6asm-dai.c                       | 3 ---
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/qcom,q6asm.txt b/Documentation/devicetree/bindings/sound/qcom,q6asm.txt
index 6b9a88d0ea3f..8c4883becae9 100644
--- a/Documentation/devicetree/bindings/sound/qcom,q6asm.txt
+++ b/Documentation/devicetree/bindings/sound/qcom,q6asm.txt
@@ -39,9 +39,9 @@ configuration of each dai. Must contain the following properties.
 	Usage: Required for Compress offload dais
 	Value type: <u32>
 	Definition: Specifies the direction of the dai stream
-			0 for both tx and rx
-			1 for only tx (Capture/Encode)
-			2 for only rx (Playback/Decode)
+			Q6ASM_DAI_TX_RX (0) for both tx and rx
+			Q6ASM_DAI_TX (1) for only tx (Capture/Encode)
+			Q6ASM_DAI_RX (2) for only rx (Playback/Decode)
 
 - is-compress-dai:
 	Usage: Required for Compress offload dais
@@ -50,6 +50,7 @@ configuration of each dai. Must contain the following properties.
 
 
 = EXAMPLE
+#include <dt-bindings/sound/qcom,q6asm.h>
 
 apr-service@7 {
 	compatible = "qcom,q6asm";
@@ -62,7 +63,7 @@ apr-service@7 {
 
 		dai@0 {
 			reg = <0>;
-			direction = <2>;
+			direction = <Q6ASM_DAI_RX>;
 			is-compress-dai;
 		};
 	};
diff --git a/include/dt-bindings/sound/qcom,q6asm.h b/include/dt-bindings/sound/qcom,q6asm.h
index 1eb77d87c2e8..f59d74f14395 100644
--- a/include/dt-bindings/sound/qcom,q6asm.h
+++ b/include/dt-bindings/sound/qcom,q6asm.h
@@ -19,4 +19,8 @@
 #define	MSM_FRONTEND_DAI_MULTIMEDIA15	14
 #define	MSM_FRONTEND_DAI_MULTIMEDIA16	15
 
+#define Q6ASM_DAI_TX_RX	0
+#define Q6ASM_DAI_TX	1
+#define Q6ASM_DAI_RX	2
+
 #endif /* __DT_BINDINGS_Q6_ASM_H__ */
diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
index a2acb7564eb8..9b7b218f2a20 100644
--- a/sound/soc/qcom/qdsp6/q6asm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
@@ -37,9 +37,6 @@
 #define COMPR_PLAYBACK_MAX_FRAGMENT_SIZE (128 * 1024)
 #define COMPR_PLAYBACK_MIN_NUM_FRAGMENTS (4)
 #define COMPR_PLAYBACK_MAX_NUM_FRAGMENTS (16 * 4)
-#define Q6ASM_DAI_TX_RX	0
-#define Q6ASM_DAI_TX	1
-#define Q6ASM_DAI_RX	2
 
 #define ALAC_CH_LAYOUT_MONO   ((101 << 16) | 1)
 #define ALAC_CH_LAYOUT_STEREO ((101 << 16) | 2)
-- 
2.27.0