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author | Konrad Dybcio <konrad.dybcio@linaro.org> | 2023-03-31 01:15:16 +0200 |
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committer | Rob Clark <robdclark@chromium.org> | 2023-04-03 07:40:04 -0700 |
commit | 3eeca5e5f3100435b06a5b5d86daa3d135a8a4bd (patch) | |
tree | 2f801d4bc671b34186003372d3e008eb11f39420 /drivers/gpu/drm/msm/adreno/adreno_device.c | |
parent | 0332bd042eb674bc430757d21a705b4f698cd262 (diff) | |
download | linux-stable-3eeca5e5f3100435b06a5b5d86daa3d135a8a4bd.tar.gz linux-stable-3eeca5e5f3100435b06a5b5d86daa3d135a8a4bd.tar.bz2 linux-stable-3eeca5e5f3100435b06a5b5d86daa3d135a8a4bd.zip |
drm/msm/adreno: adreno_gpu: Use suspend() instead of idle() on load error
The adreno_load_gpu() path is guarded by an error check on
adreno_load_fw(). This function is responsible for loading
Qualcomm-only-signed binaries (e.g. SQE and GMU FW for A6XX), but it
does not take the vendor-signed ZAP blob into account.
By embedding the SQE (and GMU, if necessary) firmware into the
initrd/kernel, we can trigger and unfortunate path that would not bail
out early and proceed with gpu->hw_init(). That will fail, as the ZAP
loader path will not find the firmware and return back to
adreno_load_gpu().
This error path involves pm_runtime_put_sync() which then calls idle()
instead of suspend(). This is suboptimal, as it means that we're not
going through the clean shutdown sequence. With at least A619_holi, this
makes the GPU not wake up until it goes through at least one more
start-fail-stop cycle. The pm_runtime_put_sync that appears in the error
path actually does not guarantee that because of the earlier enabling of
runtime autosuspend.
Fix that by using pm_runtime_put_sync_suspend to force a clean shutdown.
Test cases:
1. All firmware baked into kernel
2. error loading ZAP fw in initrd -> load from rootfs at DE start
Both succeed on A619_holi (SM6375) and A630 (SDM845).
Fixes: 0d997f95b70f ("drm/msm/adreno: fix runtime PM imbalance at gpu load")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/530001/
Link: https://lore.kernel.org/r/20230330231517.2747024-1-konrad.dybcio@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/adreno/adreno_device.c')
-rw-r--r-- | drivers/gpu/drm/msm/adreno/adreno_device.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c index 4d1448714285..8cff86e9d35c 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -471,7 +471,7 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev) return gpu; err_put_rpm: - pm_runtime_put_sync(&pdev->dev); + pm_runtime_put_sync_suspend(&pdev->dev); err_disable_rpm: pm_runtime_disable(&pdev->dev); |