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drm/panfrost: Reset the GPU when the AS_ACTIVE bit is stuck

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Things are unlikely to resolve until we reset the GPU. Let's not wait
for other faults/timeout to happen to trigger this reset.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-13-boris.brezillon@collabora.com
This commit is contained in:
Boris Brezillon
2021-06-30 08:27:47 +02:00
parent ed7a34c57d
commit f9ab9c66f0
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/panfrost/panfrost_mmu.c
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@@ -36,8 +36,11 @@ static int wait_ready(struct panfrost_device *pfdev, u32 as_nr)
ret = readl_relaxed_poll_timeout_atomic(pfdev->iomem + AS_STATUS(as_nr),
val, !(val & AS_STATUS_AS_ACTIVE), 10, 1000);
if (ret)
if (ret) {
/* The GPU hung, let's trigger a reset */
panfrost_device_schedule_reset(pfdev);
dev_err(pfdev->dev, "AS_ACTIVE bit stuck\n");
}
return ret;
}