From 837968b39521592f19f3726069ca17e957fa08dd Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Wed, 30 Jun 2021 08:27:51 +0200
Subject: drm/panfrost: Increase the AS_ACTIVE polling timeout
Git-commit: 0ec187f69bcb2f2695b50050cc63ff512f00051d
Patch-mainline: v5.15-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Experience has shown that 1ms is sometimes not enough, even when the GPU
is running at its maximum frequency, not to mention that an MMU operation
might take longer if the GPU is running at a lower frequency, which is
likely to be the case if devfreq is active.
Let's pick a significantly bigger timeout value (1ms -> 100ms) to be on
the safe side.
v5:
* New patch
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-17-boris.brezillon@collabora.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index e0356e68e768..0da5b3100ab1 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -34,7 +34,7 @@ static int wait_ready(struct panfrost_device *pfdev, u32 as_nr)
/* Wait for the MMU status to indicate there is no active command, in
* case one is pending. */
ret = readl_relaxed_poll_timeout_atomic(pfdev->iomem + AS_STATUS(as_nr),
- val, !(val & AS_STATUS_AS_ACTIVE), 10, 1000);
+ val, !(val & AS_STATUS_AS_ACTIVE), 10, 100000);
if (ret) {
/* The GPU hung, let's trigger a reset */
--
2.38.1