linux-kernel - Re: [PATCH v2] drm/msm: add PERFCTR_CNTL to ifpc

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Message-ID: <c5t3ae5ip2eoxrxv34ssudf3det73nht2ug6o6ia5lawy2ws7d@jafvcijp5hjg>
Date: Wed, 26 Nov 2025 23:42:38 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Anna Maniscalco <anna.maniscalco2000@...il.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Akhil P Oommen <akhilpo@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] drm/msm: add PERFCTR_CNTL to ifpc_reglist

On Wed, Nov 26, 2025 at 10:31:30PM +0100, Anna Maniscalco wrote:
> Previously this register would become 0 after IFPC took place which
> broke all usages of counters.
> 
> Fixes: a6a0157cc68e ("drm/msm/a6xx: Enable IFPC on Adreno X1-85")
> Signed-off-by: Anna Maniscalco <anna.maniscalco2000@...il.com>
> ---
> Changes in v2:
> - Added Fixes tag

Cc: stable@...r.kernel.org

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


> - Link to v1: https://lore.kernel.org/r/20251126-ifpc_counters-v1-1-f2d5e7048032@gmail.com
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_catalog.c | 1 +
>  1 file changed, 1 insertion(+)
> 

-- 
With best wishes
Dmitry