[PATCH v2 07/12] drm/panfrost: Reset the GPU when the AS_ACTIVE bit is stuck

[Boris Brezillon]

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.brezil...@collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_mmu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c 
b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index d5c624e776f1..d20bcaecb78f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -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;
 }
-- 
2.31.1