linux-kernel - [PATCH 07/14] drm/msm/a6xx: Bail out early if setting GPU OOB fails

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Message-Id: <20230628-topic-a7xx_drmmsm-v1-7-a7f4496e0c12@linaro.org>
Date:   Wed, 28 Jun 2023 22:35:07 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 07/14] drm/msm/a6xx: Bail out early if setting GPU OOB
 fails

If the GMU can't guarantee the required resources are up, trying to
bring up the GPU is a lost cause. Return early if setting GPU OOB
fails.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index c1c76fe288b2..7c8345ae1a30 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1201,7 +1201,9 @@ static int hw_init(struct msm_gpu *gpu)
 
 	if (!adreno_has_gmu_wrapper(adreno_gpu)) {
 		/* Make sure the GMU keeps the GPU on while we set it up */
-		a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
+		ret = a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
+		if (ret)
+			return ret;
 	}
 
 	/* Clear GBIF halt in case GX domain was not collapsed */

-- 
2.41.0