linux-kernel - Re: [PATCH 4/4] drm/msm/a6xx: Add a comment to acd

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Message-ID: <694f0989-64ea-4c3c-8613-863da1dd286a@oss.qualcomm.com>
Date: Tue, 2 Sep 2025 14:33:05 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Akhil P Oommen <akhilpo@....qualcomm.com>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov
 <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Jonathan Marek <jonathan@...ek.ca>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] drm/msm/a6xx: Add a comment to acd_probe()

On 9/2/25 1:50 PM, Akhil P Oommen wrote:
> It is not obvious why we can skip error checking of
> dev_pm_opp_find_freq_exact() API. Add a comment explaining it.
> 
> Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index ea52374c9fcd481d816ed9608e9f6eb1c2e3005a..de8f7051402bf0fd931fc065b5c4c49e2bfd5dc7 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -1694,6 +1694,7 @@ static int a6xx_gmu_acd_probe(struct a6xx_gmu *gmu)
>  		u32 val;
>  
>  		freq = gmu->gpu_freqs[i];
> +		/* This is unlikely to fail because we are passing back a known freq */

This could probably mention that known == we just retrieved it a couple
function calls above, but I suppose the reader can come up with such
conclusions

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad