Re: [PATCH v8 2/2] i2c: qcom-geni: Add dynamic transfer timeout based on transfer length and frequency

[Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>]

On 8/27/2026 5:57 PM, Aniket Randive wrote:
> The driver uses a static XFER_TIMEOUT of HZ (1 second) for all transfers
> regardless of message length or bus frequency, causing unnecessary
> delays on error paths.
> 
> Use i2c_update_timeout() API to calculate transfer timeouts dynamically
> based on message length and bus frequency. update the timeout per message
> for FIFO, SE-DMA and GPI single descriptor transfers. For GPI multi
> descriptor transfers, calculate the timeout from the combined length of
> all messages, as completion is reported only after the entire batch has
> finished.
> 
> A 10x safety margin over the theoretical wire time is applied, with a
> 300ms floor to account for I2C clock stretching and other situations where
> a slave may keep SCL asserted for an extended period, including faulty
> devices holding the bus.
> 
> Signed-off-by: Aniket Randive <aniket.randive@oss.qualcomm.com>
> ---
Reviewed-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>