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39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
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From fed148f1453de5a632d40e6b81c355c678d9a273 Mon Sep 17 00:00:00 2001
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From: Alexey Sheplyakov <asheplyakov@basealt.ru>
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Date: Mon, 23 May 2022 19:34:31 +0400
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Subject: [PATCH 624/631] 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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Signed-off-by: Alexey Sheplyakov <asheplyakov@basealt.ru>
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X-DONTUPSTREAM
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X-feature-Baikal-M
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---
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drivers/gpu/drm/panfrost/panfrost_devfreq.c | 5 +++++
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1 file changed, 5 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 fe5f12f16a63..a0eef1309f54 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 +100,11 @@ 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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+ of_device_is_compatible(of_root, "baikal,bm1000")) {
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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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if (ret) {
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--
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2.35.2
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