Commit 0ec187f6 authored Jun 30, 2021 by Boris Brezillon

drm/panfrost: Increase the AS_ACTIVE polling timeout



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

parent 030761e0

drivers/gpu/drm/panfrost/panfrost_mmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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 */