Messages in this thread | | | Date | Wed, 27 Sep 2023 13:01:40 -0700 | Subject | Re: [PATCH v7 09/33] ASoC: qdsp6: q6afe: Increase APR timeout | From | Wesley Cheng <> |
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Hi Mark,
On 9/27/2023 7:50 AM, Mark Brown wrote: > On Thu, Sep 21, 2023 at 02:48:19PM -0700, Wesley Cheng wrote: >> For USB offloading situations, the AFE port start command will result in a >> QMI handshake between the Q6DSP and the main processor. Depending on if >> the USB bus is suspended, this routine would require more time to complete, >> as resuming the USB bus has some overhead associated with it. Increase the >> timeout to 3s to allow for sufficient time for the USB QMI stream enable >> handshake to complete. > > ... > >> -#define TIMEOUT_MS 1000 >> +#define TIMEOUT_MS 3000 > > That seems worryingly large but if it's what the hardware/firmware needs > I guess there's nothing doing - even the 1s that's being replaced would > be nasty if we ever actually hit it.
I may have gone overkill with the delay, but when I measured the duration of the AFE start command it took ~1.5-2s. It has to also account for the overhead within handling the USB QMI request in the qc_audio_offload driver.
Thanks Wesley Cheng
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