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Date:   Tue, 6 Jun 2023 21:00:13 +0530
From:   Akhil P Oommen <quic_akhilpo@quicinc.com>
To:     Konrad Dybcio <konrad.dybcio@linaro.org>
CC:     Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Conor Dooley <conor+dt@kernel.org>,
        <linux-arm-msm@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
        <freedreno@lists.freedesktop.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, Rob Clark <robdclark@chromium.org>,
        Marijn Suijten <marijn.suijten@somainline.org>
Subject: Re: [PATCH v8 04/18] drm/msm/a6xx: Move force keepalive vote removal
 to a6xx_gmu_force_off()
Message-ID: <23c2tadnl5hyeyo2i4onxfgx76dfsc6zefasdhxcdzoebsn7rg@24noupcp5h2h>
References: <20230223-topic-gmuwrapper-v8-0-69c68206609e@linaro.org>
 <20230223-topic-gmuwrapper-v8-4-69c68206609e@linaro.org>
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On Mon, May 29, 2023 at 03:52:23PM +0200, Konrad Dybcio wrote:
> 
> As pointed out by Akhil during the review process of GMU wrapper
> introduction [1], it makes sense to move this write into the function
> that's responsible for forcibly shutting the GMU off.
> 
> It is also very convenient to move this to GMU-specific code, so that
> it does not have to be guarded by an if-condition to avoid calling it
> on GMU wrapper targets.
> 
> Move the write to the aforementioned a6xx_gmu_force_off() to achieve
> that. No effective functional change.
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
-Akhil.
> 
> [1] https://lore.kernel.org/linux-arm-msm/20230501194022.GA18382@akhilpo-linux.qualcomm.com/
> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 ++++++
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 6 ------
>  2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index 87babbb2a19f..9421716a2fe5 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -912,6 +912,12 @@ static void a6xx_gmu_force_off(struct a6xx_gmu *gmu)
>  	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
>  	struct msm_gpu *gpu = &adreno_gpu->base;
>  
> +	/*
> +	 * Turn off keep alive that might have been enabled by the hang
> +	 * interrupt
> +	 */
> +	gmu_write(&a6xx_gpu->gmu, REG_A6XX_GMU_GMU_PWR_COL_KEEPALIVE, 0);
> +
>  	/* Flush all the queues */
>  	a6xx_hfi_stop(gmu);
>  
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 9fb214f150dd..e34aa15156a4 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1274,12 +1274,6 @@ static void a6xx_recover(struct msm_gpu *gpu)
>  	/* Halt SQE first */
>  	gpu_write(gpu, REG_A6XX_CP_SQE_CNTL, 3);
>  
> -	/*
> -	 * Turn off keep alive that might have been enabled by the hang
> -	 * interrupt
> -	 */
> -	gmu_write(&a6xx_gpu->gmu, REG_A6XX_GMU_GMU_PWR_COL_KEEPALIVE, 0);
> -
>  	pm_runtime_dont_use_autosuspend(&gpu->pdev->dev);
>  
>  	/* active_submit won't change until we make a submission */
> 
> -- 
> 2.40.1
>