Re: [PATCH 1/2] ASoC: dt-bindings: Add sample format conversion

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On 28-07-2022 17:52, Krzysztof Kozlowski wrote:
On 27/07/2022 16:26, Sameer Pujar wrote:
Presently "convert-channels" and "convert-rate" DT bindings are available
for channel and rate fixups respectively.

Similarly add "convert-sample-format" binding to fixup DAI sample format
as well. This is added to simple-card and audio-graph based sound cards.

Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
  .../devicetree/bindings/sound/audio-graph-port.yaml | 21 +++++++++++++++++++++
  .../devicetree/bindings/sound/audio-graph.yaml      | 11 +++++++++++
  .../devicetree/bindings/sound/simple-card.yaml      | 15 +++++++++++++++
  3 files changed, 47 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
index 5c36867..d7491038 100644
--- a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
+++ b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
@@ -24,6 +24,17 @@ properties:
    convert-channels:
      description: CPU to Codec rate channels.
      $ref: /schemas/types.yaml#/definitions/uint32
Missing blank line.

will fix.


+  convert-sample-format:
+    description: CPU to Codec sample format.
+      Value    Format
+        0        S8
+        2        S16_LE
+        6        S24_LE
+        10       S32_LE
+        32       S24_3LE
Why some random set of integers? Just use string, must more descriptive
and you do not embed programming model to DT... unless there is some
reason for this approach?

I referenced it from similar usage in fsl,easrc.yaml for binding "fsl,asrc-format" and driver can directly use it. However agree with above and let me use strings here.


[...]


diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
index b261d49..6decd73 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.yaml
+++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
@@ -77,6 +77,17 @@ definitions:
      description: CPU to Codec rate channels.
      $ref: /schemas/types.yaml#/definitions/uint32

+  convert-sample-format:
+    description: CPU to Codec sample format.
+      Value    Format
+        0        S8
+        2        S16_LE
+        6        S24_LE
+        10       S32_LE
+        32       S24_3LE
+    $ref: /schemas/types.yaml#/definitions/uint32
Wait, you now put the same property in four different places. Don't you
have something which could be shared?

There is no shared schema between simple-card.yaml and others. I will have to create a new doc to share these definitions.




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