Re: [PATCH v4 0/2] Add SMI reset and clamp for MediaTek MT8188 SoC

["Friday Yang (杨阳)" <Friday.Yang@mediatek.com>]

On Sat, 2025-02-22 at 10:45 +0100, Krzysztof Kozlowski wrote:
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> 
> On Fri, Feb 21, 2025 at 03:48:30PM +0800, Friday Yang wrote:
> > Based on tag: next-20250220, linux-next/master
> > 
> > On the MediaTek MT8188 SoC platform, we encountered power-off
> > failures
> > and SMI bus hang issues during camera stress tests. The issue
> > arises
> > because bus glitches are sometimes produced when MTCMOS powers on
> > or
> > off. While this is fairly normal, the software must handle these
> > glitches to avoid mistaking them for transaction signals. What's
> > more, this issue emerged only after the initial upstreaming of SMI
> > driver.
> > 
> > The software solutions can be summarized as follows:
> > 
> > 1. Use CLAMP to disable the SMI sub-common port after turning off
> > the
> >    LARB CG and before turning off the LARB MTCMOS.
> > 2. Use CLAMP to disable/enable the SMI sub-common port.
> > 3. Implement an AXI reset for SMI LARBs.
> > 
> > Changes v4:
> > - Use 'devm_reset_control_get_optional_exclusive' instead of
> >   'devm_reset_control_get'.
> > 
> > v3:
> > https://lore.kernel.org/lkml/20250121064934.13482-2-
> 
> That's not a valid link. Fix your email client.
> 

Sorry for the inconvenience. The Web link is quite long, so I have
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> Best regards,
> Krzysztof
>