From: Johan Hovold <johan+linaro@xxxxxxxxxx>
[ Upstream commit 6153c44392b04ff2da1e9aa82ba87da9ab9a0fc1 ]
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: 4b18299b3365 ("drm/msm/adreno: Defer enabling runpm until hw_init()")
Reported-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
Link: https://lore.kernel.org/lkml/20230203181245.3523937-1-quic_bjorande@xxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx # 6.0
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/523549/
Link: https://lore.kernel.org/r/20230221101430.14546-2-johan+linaro@xxxxxxxxxx
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/adreno_device.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 36f062c7582f9..c5c4c93b3689c 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -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;
--
2.39.2
