On Tue, 15 Oct 2024 17:37:46 +0530, Jyothi Kumar Seerapu wrote:

When high performance with multiple i2c messages in a single transfer is required, employ Block Event Interrupt (BEI) to trigger interrupts after specific messages transfer and the last message transfer, thereby reducing interrupts.

For each i2c message transfer, a series of Transfer Request Elements(TREs) must be programmed, including config tre for frequency configuration, go tre for holding i2c address and dma tre for holding dma buffer address, length as per the hardware programming guide. For transfer using BEI, multiple I2C messages may necessitate the preparation of config, go, and tx DMA TREs. However, a channel TRE size of 64 is often insufficient, potentially leading to failures due to inadequate memory space.

Add additional argument to dma-cell property for channel TRE size. With this, adjust the channel TRE size via the device tree. The default size is 64, but clients can modify this value based on their specific requirements.

Signed-off-by: Jyothi Kumar Seerapu quic_jseerapu@quicinc.com

Documentation/devicetree/bindings/dma/qcom,gpi.yaml | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/qcom,gpi.yaml: properties:#dma-cells: 'minItems' is not one of ['description', 'deprecated', 'const', 'enum', 'minimum', 'maximum', 'multipleOf', 'default', '$ref', 'oneOf'] from schema $id: http://devicetree.org/meta-schemas/core.yaml# /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/qcom,gpi.yaml: properties:#dma-cells: 'maxItems' is not one of ['description', 'deprecated', 'const', 'enum', 'minimum', 'maximum', 'multipleOf', 'default', '$ref', 'oneOf'] from schema $id: http://devicetree.org/meta-schemas/core.yaml#

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/2024101512075...

The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.