linux-kernel - Re: [PATCH] pmdomain: samsung: Fix splash-screen handover by enforcing a sync

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Message-ID: <be042c1e-fac0-4928-a378-1fe3fec14a9e@kernel.org>
Date: Sat, 12 Jul 2025 09:52:33 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ulf Hansson <ulf.hansson@...aro.org>,
 Marek Szyprowski <m.szyprowski@...sung.com>, linux-pm@...r.kernel.org
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pmdomain: samsung: Fix splash-screen handover by
 enforcing a sync_state

On 11/07/2025 13:47, Ulf Hansson 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@...sung.com>
> Link: https://lore.kernel.org/all/212a1a56-08a5-48a5-9e98-23de632168d0@samsung.com
> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof