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https://abf.rosa.ru/djam/kernel-5.15.git
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36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
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From 531ced5d7d678240e6e18ddc89cb32bf74423b60 Mon Sep 17 00:00:00 2001
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From: Alexey Sheplyakov <asheplyakov@altlinux.org>
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Date: Mon, 21 Jun 2021 15:42:47 +0400
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Subject: [PATCH 621/634] drm/panfrost: disable devfreq on Baikal-M
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Enabling GPU frequency scaling on Baikal-M cases GPU MMU lockup:
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[ 38.108633] panfrost 2a200000.gpu: AS_ACTIVE bit stuck
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Since GPU and CPU share the memory this locks up the whole system.
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Therefore disable devfreq on Baikal-M.
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X-DONTUPSTREAM
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---
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drivers/gpu/drm/panfrost/panfrost_devfreq.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
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index 194af7f60..fc0e586f8 100644
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--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
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+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
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@@ -100,6 +100,10 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
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DRM_DEV_INFO(dev, "More than 1 supply is not supported yet\n");
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return 0;
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}
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+ if (of_device_is_compatible(of_root, "baikal,baikal-m")) {
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+ dev_info(pfdev->dev, "disabling GPU devfreq on BE-M1000\n");
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+ return 0;
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+ }
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ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
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pfdev->comp->num_supplies);
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--
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2.33.2
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