linux-kernel - Re: [PATCH] Revert "soc: qcom: stats: Add DDR sleep stats"

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Date: Sat, 16 Dec 2023 01:05:53 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Arnd Bergmann <arnd@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Doug Anderson <dianders@...omium.org>
Subject: Re: [PATCH] Revert "soc: qcom: stats: Add DDR sleep stats"

On 14.12.2023 13:25, Konrad Dybcio wrote:
> After recent reports ([1], [2]) of older platforms (particularly 8150 and
> 7180) breaking after DDR sleep stats introduction, revert the following:
> 
> Commit 73380e2573c3 ("soc: qcom: stats: fix 64-bit division")
> Commit e84e61bdb97c ("soc: qcom: stats: Add DDR sleep stats")
> 
> The feature itself is rather useful for debugging DRAM power management,
> however it looks like the shared RPMh stats data structures differ on
> previous SoCs.
> 
> Revert its addition for now to un-break booting on these earlier SoCs,
> while I try to come up with a better way to enable it conditionally.
> 
> [1] https://lore.kernel.org/linux-arm-msm/20231209215601.3543895-2-dmitry.baryshkov@linaro.org/
> [2] https://lore.kernel.org/linux-arm-msm/CAD=FV=XX4wLg1NNVL15RK4D4tLvuSzZyUv=k_tS4bSb3=7QJzQ@mail.gmail.com/
> 
> Reported-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reported-by: Doug Anderson <dianders@...omium.org>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
Arnd, since Bjorn seems to be MIA, could you please pick this directly
so that it gets into the next RC? Un-breaking booting on some platforms
would be very welcome :D

Konrad