On Fri, 11 Jul 2025 at 13:47, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > 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 <m.szyprowski@xxxxxxxxxxx> > Link: https://lore.kernel.org/all/212a1a56-08a5-48a5-9e98-23de632168d0@xxxxxxxxxxx > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Marek, Krzysztof thanks for reviewing and testing! I have applied for this for next! Kind regards Uffe > --- > 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 9b502e8751d1..5d478bb37ad6 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; > } > -- > 2.43.0 >
