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drm/msm/adreno: fix runtime PM imbalance at unbind 

[ Upstream commit 6153c44392 ]

A recent commit moved enabling of runtime PM from adreno_gpu_init() to
adreno_load_gpu() (called on first open()), which means that unbind()
may now be called with runtime PM disabled in case the device was never
opened in between.

Make sure to only forcibly suspend and disable runtime PM at unbind() in
case runtime PM has been enabled to prevent a disable count imbalance.

This specifically avoids leaving runtime PM disabled when the device
is later opened after a successful bind:

	msm_dpu ae01000.display-controller: [drm:adreno_load_gpu [msm]] *ERROR* Couldn't power up the GPU: -13

Fixes: 4b18299b33 ("drm/msm/adreno: Defer enabling runpm until hw_init()")
Reported-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/lkml/20230203181245.3523937-1-quic_bjorande@quicinc.com
Cc: stable@vger.kernel.org	# 6.0
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/523549/
Link: https://lore.kernel.org/r/20230221101430.14546-2-johan+linaro@kernel.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johan Hovold 2023-02-21 11:14:27 +01:00 committed by Greg Kroah-Hartman
parent d1a3ca3ad4
commit 09fa1a6b0c
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/msm/adreno/adreno_device.c
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@ -558,7 +558,8 @@ static void adreno_unbind(struct device *dev, struct device *master,
struct msm_drm_private *priv = dev_get_drvdata(master);
struct msm_gpu *gpu = dev_to_gpu(dev);
WARN_ON_ONCE(adreno_system_suspend(dev));
if (pm_runtime_enabled(dev))
WARN_ON_ONCE(adreno_system_suspend(dev));
gpu->funcs->destroy(gpu);
priv->gpu_pdev = NULL;