linux-kernel - Re: [PATCH 5/5] drm/msm/a5xx: Enable optional icc voting from OPP tables

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Date:   Thu, 23 Feb 2023 00:12:53 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] drm/msm/a5xx: Enable optional icc voting from OPP
 tables

On 22/02/2023 23:47, Konrad Dybcio wrote:
> Add the dev_pm_opp_of_find_icc_paths() call to let the OPP framework
> handle bus voting as part of power level setting.

This can probably go to the generic code path rather than sticking it 
into a5xx only.

> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>   drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> index d09221f97f71..a33af0cc27b6 100644
> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> @@ -1775,5 +1775,9 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
>   	/* Set up the preemption specific bits and pieces for each ringbuffer */
>   	a5xx_preempt_init(gpu);
>   
> +	ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL);
> +	if (ret)
> +		return ERR_PTR(ret);
> +
>   	return gpu;
>   }
> 

-- 
With best wishes
Dmitry