Re: [PATCH V4 09/14] i3c: master: Report wakeup events for IBIs

On Thu, Aug 06, 2026 at 04:18:52PM +0300, Adrian Hunter wrote:
> An I3C device configured as a wakeup source can wake the system by
> generating an In-Band Interrupt (IBI).
>
> When an IBI is queued for processing, record a wakeup event for the
> device if wakeup is enabled.  Use a 100 ms processing interval to give
> the I3C device driver time to process the IBI.
>
> Signed-off-by: Adrian Hunter <[email protected]>
> ---

Reviewed-by: Frank Li <[email protected]>

>
>
> Changes in V4:
>
> 	None
>
> Changes in V2 and V3:
>
> 	None
>
>
>  drivers/i3c/master.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> index 2616354dbe54..6c5341491944 100644
> --- a/drivers/i3c/master.c
> +++ b/drivers/i3c/master.c
> @@ -3384,6 +3384,9 @@ static void i3c_master_unregister_i3c_devs(struct i3c_master_controller *master)
>  	}
>  }
>
> +/* Approximate time for IBI handler to run */
> +#define I3C_WAKEUP_PROCESSING_TIME_MS 100
> +
>  /**
>   * i3c_master_queue_ibi() - Queue an IBI
>   * @dev: the device this IBI is coming from
> @@ -3397,6 +3400,9 @@ void i3c_master_queue_ibi(struct i3c_dev_desc *dev, struct i3c_ibi_slot *slot)
>  	if (!dev->ibi || !slot)
>  		return;
>
> +	if (device_may_wakeup(&dev->dev->dev))
> +		pm_wakeup_event(&dev->dev->dev, I3C_WAKEUP_PROCESSING_TIME_MS);
> +
>  	atomic_inc(&dev->ibi->pending_ibis);
>  	queue_work(dev->ibi->wq, &slot->work);
>  }
> --
> 2.53.0
>

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