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