From 0745658aebbe77bcb3ba82f184087e12af2f3df5 Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Fri, 11 Jul 2025 13:47:19 +0200 Subject: [PATCH] pmdomain: samsung: Fix splash-screen handover by enforcing a sync_state It's has been reported that some Samsung platforms fails to boot with genpd's new sync_state support. Typically the problem exists for platforms where bootloaders are turning on the splash-screen and handing it over to be managed by the kernel. However, at this point, it's not clear how to correctly solve the problem. Although, to make the platforms boot again, let's add a temporary hack in the samsung power-domain provider driver, which enforces a sync_state that allows the power-domains to be reset before consumer devices starts to be attached. Reported-by: Marek Szyprowski Link: https://lore.kernel.org/all/212a1a56-08a5-48a5-9e98-23de632168d0@samsung.com Acked-by: Krzysztof Kozlowski Tested-by: Marek Szyprowski Signed-off-by: Ulf Hansson Link: https://lore.kernel.org/r/20250711114719.189441-1-ulf.hansson@linaro.org --- drivers/pmdomain/samsung/exynos-pm-domains.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/pmdomain/samsung/exynos-pm-domains.c b/drivers/pmdomain/samsung/exynos-pm-domains.c index 9b502e8751d18..5d478bb37ad68 100644 --- a/drivers/pmdomain/samsung/exynos-pm-domains.c +++ b/drivers/pmdomain/samsung/exynos-pm-domains.c @@ -147,6 +147,15 @@ static int exynos_pd_probe(struct platform_device *pdev) parent.np, child.np); } + /* + * Some Samsung platforms with bootloaders turning on the splash-screen + * and handing it over to the kernel, requires the power-domains to be + * reset during boot. As a temporary hack to manage this, let's enforce + * a sync_state. + */ + if (!ret) + of_genpd_sync_state(np); + pm_runtime_enable(dev); return ret; } -- 2.47.2