Re: [PATCH 1/2] mmc: mtk-sd: add Inline Crypto Engine support

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Il 31/10/22 10:50, Mengqi Zhang (张梦琦) ha scritto:
On Tue, 2022-10-18 at 11:50 +0200, AngeloGioacchino Del Regno wrote:
Il 17/10/22 16:20, Mengqi Zhang ha scritto:
add crypto clock control and ungate it before CQHCI init.

Signed-off-by: Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx>

Hello Mengqi,
I'm a bit surprised that enabling ICE only requires enabling a clock
as
on downstream code I see some SMC calls to
MTK_SIP_KERNEL_HW_FDE_MSDC_CTL.

Can you please explain why SMC calls are not needed here?

Thanks,
Angelo


Hi Angelo,

There are many wrong quotes in previous reply, let me fix it here.

In some MTK SoC, we need set a encrypto enable bit
MTK_SIP_KERNEL_HW_FDE_MSDC_CTL in secure world, so we use SMC call to
finish it.
But not every MTK SoC need to set this bit in secure world. This patch
is for these SoCs.
As for SMC call, we haven't found a proper way to deal with it, we'll
do it later.


Thanks for clarifying.
In that case, I'm a little worried about people trying to enable ICE on SoCs
that do require calling into TZ and getting a crash... but it's anyway out of
scope for this series, so:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>





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