linux-kernel - Re: [PATCH] interconnect: qcom: sdm845: Enable keepalive for the MM1 BCM

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Date:   Tue, 13 Oct 2020 18:10:21 -0700
From:   Mike Tipton <mdtipton@...eaurora.org>
To:     Georgi Djakov <georgi.djakov@...aro.org>, linux-pm@...r.kernel.org
Cc:     okukatla@...eaurora.org, sibis@...eaurora.org,
        bjorn.andersson@...aro.org, amit.pundir@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] interconnect: qcom: sdm845: Enable keepalive for the MM1
 BCM

On 10/12/2020 12:40 PM, Georgi Djakov wrote:
> After enabling interconect scaling for display on the db845c board,
s/interconect/interconnect/

> in certain configurations the board hangs, while the following errors
> are observed on the console:
> 
>    Error sending AMC RPMH requests (-110)
>    qcom_rpmh TCS Busy, retrying RPMH message send: addr=0x50000
>    qcom_rpmh TCS Busy, retrying RPMH message send: addr=0x50000
>    qcom_rpmh TCS Busy, retrying RPMH message send: addr=0x50000
>    ...
> 
> In this specific case, the above is related to one of the sequencers
> being stuck, while client drivers are returning from probe and trying
> to disable the currently unused clock and interconnect resources.
> Generally we want to keep the multimedia NoC enabled like the rest of
> the NoCs, so let's set the keepalive flag on it too.
> 
> Fixes: aae57773fbe0 ("interconnect: qcom: sdm845: Split qnodes into their respective NoCs")
> Reported-by: Amit Pundir <amit.pundir@...aro.org>
> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>
> ---
>   drivers/interconnect/qcom/sdm845.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 

Reviewed-by: Mike Tipton <mdtipton@...eaurora.org>