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35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From 5f6a25cbd373aa72738189356a0f606daa7bba59 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] panfrost: disable devfreq on BE-M1000 SoC
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Enabling GPU frequency scaling on BE-M1000 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 BE-M1000.
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---
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drivers/gpu/drm/panfrost/panfrost_devfreq.c | 6 ++++++
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1 file changed, 6 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 8ab025d0035f..c2f46665cf33 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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@@ -97,6 +97,12 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
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struct thermal_cooling_device *cooling;
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struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
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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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+ ret = 0;
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+ goto err_fini;
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+ }
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+
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opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
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pfdev->comp->num_supplies);
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if (IS_ERR(opp_table)) {
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--
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2.31.1
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