linux-kernel - [PATCH v2 2/7] drm/msm: Correct pm

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Message-ID: <20220709112837.v2.2.Ib07ecec3d5c17cb0e1efa6fcddaaa019ec2fb556@changeid>
Date:   Sat, 9 Jul 2022 11:29:30 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
CC:     Jonathan Marek <jonathan@...ek.ca>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Matthias Kaehlcke <mka@...omium.org>,
        "Douglas Anderson" <dianders@...omium.org>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/7] drm/msm: Correct pm_runtime votes in recover worker

In the scenario where there is one a single submit which is hung, gpu is
power collapsed when it is retired. Because of this, by the time we call
reover(), gpu state would be already clear. Fix this by correctly
managing the pm runtime votes.

Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---

(no changes since v1)

 drivers/gpu/drm/msm/msm_gpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index c2bfcf3f..18c1544 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -394,7 +394,6 @@ static void recover_worker(struct kthread_work *work)
 	/* Record the crash state */
 	pm_runtime_get_sync(&gpu->pdev->dev);
 	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
-	pm_runtime_put_sync(&gpu->pdev->dev);
 
 	kfree(cmd);
 	kfree(comm);
@@ -442,6 +441,8 @@ static void recover_worker(struct kthread_work *work)
 		}
 	}
 
+	pm_runtime_put_sync(&gpu->pdev->dev);
+
 	mutex_unlock(&gpu->lock);
 
 	msm_gpu_retire(gpu);
-- 
2.7.4