[PATCH v1 1/5] dt-bindings: dmaengine: qcom: gpi: Add additional arg to dma-cell property
Jyothi Kumar Seerapu
quic_jseerapu at quicinc.com
Fri Oct 25 18:11:53 UTC 2024
On 10/15/2024 7:01 PM, Krzysztof Kozlowski wrote:
> On 15/10/2024 14:07, 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.
> Please kindly test the patches before you sent them. Upstream is not a
> testing service.
Sure, i will take care to test the required patches.
>
> Best regards,
> Krzysztof
>
More information about the dri-devel
mailing list