Re: [PATCH] arm64: dts: qcom: sdm630: Add interconnect paths to the BLSP I2C and SPI controllers

[Konrad Dybcio]

On 10/9/26 10:49 PM, Fabricio Akio via B4 Relay wrote:
> From: Fabricio Akio <fabricioakio@xxxxxxxxx>
> 
> The QUP I2C and SPI controllers move their data through the BLSP BAM
> DMA engines, which reach DDR as the aggregation NoC masters BLSP_1 and
> BLSP_2. No path is described for them, so nothing requests bandwidth for
> those masters while a transfer runs.
> 
> Describe the path from each controller's BLSP master to DDR, as the
> vendor kernel votes it. On a Motorola Moto X4 (SDM630), with the
> boot-time interconnect votes released and system-level sleep enabled,
> an I2C transfer running as the SoC entered that sleep hung the SoC
> without these paths; with them, 5,000 transfers ran through about 3,000
> sleep entries.
> 
> Signed-off-by: Fabricio Akio <fabricioakio@xxxxxxxxx>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad