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

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Message-Id: <20250902-assorted-sept-1-v1-4-f3ec9baed513@oss.qualcomm.com>
Date: Tue, 02 Sep 2025 17:20:03 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: 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,
        Akhil P Oommen <akhilpo@....qualcomm.com>
Subject: [PATCH 4/4] drm/msm/a6xx: Add a comment to acd_probe()

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 */
 		opp = dev_pm_opp_find_freq_exact(&gpu->pdev->dev, freq, true);
 		np = dev_pm_opp_get_of_node(opp);
 

-- 
2.50.1