From fed148f1453de5a632d40e6b81c355c678d9a273 Mon Sep 17 00:00:00 2001 From: Alexey Sheplyakov Date: Mon, 23 May 2022 19:34:31 +0400 Subject: [PATCH 624/631] 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. Signed-off-by: Alexey Sheplyakov X-DONTUPSTREAM X-feature-Baikal-M --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index fe5f12f16a63..a0eef1309f54 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -100,6 +100,11 @@ 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") || + of_device_is_compatible(of_root, "baikal,bm1000")) { + dev_info(pfdev->dev, "disabling GPU devfreq on BE-M1000\n"); + return 0; + } ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names); if (ret) { -- 2.35.2