linux-kernel - Re: [PATCH v6 0/6] DVFS for IO devices on sdm845 and sc7180

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Date:   Wed, 1 Jul 2020 16:58:13 +0530
From:   Rajendra Nayak <rnayak@...eaurora.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Mark Brown <broonie@...nel.org>
Cc:     bjorn.andersson@...aro.org, agross@...nel.org, robdclark@...il.com,
        robdclark@...omium.org, viresh.kumar@...aro.org, sboyd@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/6] DVFS for IO devices on sdm845 and sc7180

Hey Stan,

>>
>> Hey Stan,
>>   
>>> On 6/18/20 7:47 AM, Rajendra Nayak wrote:
>>>> Hey Matthias, thanks for summarizing this.
>>>>
>>>> On 6/18/2020 3:45 AM, Matthias Kaehlcke wrote:
>>>>> What is the plan for landing these, it seems not all must/should
>>>>> go through the QCOM tree.
>>>>>
>>>>> My guesses:
>>>>>
>>>>> tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state
>>>>> spi: spi-geni-qcom: Use OPP API to set clk/perf state
>>>>>      QCOM tree due to shared dependency on change in
>>>>> include/linux/qcom-geni-se.h
>>>>
>>>> That's correct, Bjorn/Andy, can these be pulled in now for 5.9?
>>>> They have acks from Greg for serial and Mark for the spi patch.
>>>>   
>>>>> drm/msm/dpu: Use OPP API to set clk/perf state
>>>>> drm/msm: dsi: Use OPP API to set clk/perf state
>>>>>      drm/msm tree
>>>>
>>>> Correct, the dsi patch is still not reviewed by Rob, so once that's
>>>> done,
>>>> I am guessing Rob would pull both of these.
>>>>
>>>>>
>>>>> media: venus: core: Add support for opp tables/perf voting
>>>>>      venus tree
>>>>
>>>> correct, this is pending review/ack from Stan.
>>>
>>> I tested the changes in the driver, and they looks fine. But when
>>> applied the corresponding change in the DT node I see this message when
>>> the streaming is stopping:
>>>
>>> qcom_rpmh TCS Busy, retrying RPMH message send: addr=0x30000
>>>
>>> I tested on v5.7 (linaro-integration). Should I be worried ?

I had a look at this message and also spoke to Maulik, and it seems
like its fairly harmless. It just suggests we had to wait a while to
get a TCS, and then retry, So nothing to worry about.

thanks,
Rajendra

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