[PATCH v5 1/9] dt-bindings: soundwire: qcom: clarify data port bus parameters

Srinivas Kandagatla
2021-03-26T06:42:00Z

Some of the parameters for data ports are not applicable or not implemented
in IP. So mark them as invalid/not applicable in DT so that controller is
aware of this.

Add comment to these bindings to provide more clarity on the values!

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
.../bindings/soundwire/qcom,sdw.txt | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
index b104be131235..b93a2b3e029d 100644
--- a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
+++ b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
@@ -54,6 +54,8 @@ board specific bus parameters.
Value type: <prop-encoded-array>
Definition: should specify payload transport window offset1 of each
data port. Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-offset2:
@@ -61,6 +63,8 @@ board specific bus parameters.
Value type: <prop-encoded-array>
Definition: should specify payload transport window offset2 of each
data port. Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-sinterval-low:
@@ -69,12 +73,16 @@ board specific bus parameters.
Definition: should be sample interval low of each data port.
Out ports followed by In ports. Used for Sample Interval
calculation.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-word-length:
Usage: optional
Value type: <prop-encoded-array>
Definition: should be size of payload channel sample.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-block-pack-mode:
@@ -84,6 +92,8 @@ board specific bus parameters.
0 to indicate Blocks are per Channel
1 to indicate Blocks are per Port.
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-block-group-count:
@@ -92,6 +102,8 @@ board specific bus parameters.
Definition: should be in range 1 to 4 to indicate how many sample
intervals are combined into a payload.
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-lane-control:
@@ -100,6 +112,8 @@ board specific bus parameters.
Definition: should be in range 0 to 7 to identify which data lane
the data port uses.
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-hstart:
@@ -109,6 +123,8 @@ board specific bus parameters.
SoundWire Frame, i.e. left edge of the Transport sub-frame
for each port. Values between 0 and 15 are valid.
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,ports-hstop:
@@ -118,6 +134,8 @@ board specific bus parameters.
SoundWire Frame, i.e. the right edge of the Transport
sub-frame for each port. Values between 0 and 15 are valid.
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

- qcom,dports-type:
@@ -128,6 +146,8 @@ board specific bus parameters.
1 for simple ports
2 for full port
Out ports followed by In ports.
+ Value of 0xFF indicates that this option is not implemented
+ or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.

Note:
--
2.21.0