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Message-ID: <ZsYLKFCvLdMn5FM3@smile.fi.intel.com>
Date: Wed, 21 Aug 2024 18:43:36 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Shyam Sundar S K <Shyam-sundar.S-k@....com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
Guruvendra Punugupati <Guruvendra.Punugupati@....com>,
Krishnamoorthi M <krishnamoorthi.m@....com>,
linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/6] i3c: mipi-i3c-hci: Add AMDI5017 ACPI ID to the
I3C Support List
On Wed, Aug 21, 2024 at 06:42:13PM +0300, Andy Shevchenko wrote:
> On Wed, Aug 21, 2024 at 06:39:04PM +0300, Andy Shevchenko wrote:
> > On Wed, Aug 21, 2024 at 08:42:12PM +0530, Shyam Sundar S K wrote:
> > > On 8/21/2024 19:26, Andy Shevchenko wrote:
> > > > On Wed, Aug 21, 2024 at 07:07:45PM +0530, Shyam Sundar S K wrote:
> > > >> On 8/21/2024 19:05, Shyam Sundar S K wrote:
...
> > > >>> This update adds the AMDI5017 ACPI ID to the list of supported IDs.
> >
> > s/This update adds/Add/
> >
> > > > Please, provide a DSDT excerpt to show how it will look like in the ACPI
> > > > tables.
> > >
> > > Scope (_SB)
> > > {
> > > ...
> > >
> > > Name (HCID, "AMDI5017")
> > > Device (I3CA)
> > > {
> > > Method (_HID, 0, Serialized) // _HID: Hardware ID
> > > {
> > > If ((I30M == Zero))
> > > {
> > > If (CondRefOf (HCIB))
> > > {
> > > Return (HCID) /* \_SB_.HCID */
> > > }
> > > Else
> > > {
> > > Return (I3ID) /* \_SB_.I3ID */
> >
> > Do I understand correctly that I3ID is the old one (as per another path I have
> > seen last week or so), i.o.w. *not* a MIPI allocated one?
> >
> > If it's the case, feel free to add
> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> > from ACPI ID perspective.
>
> Regarding MIPI ID and using it as a _CID is kinda unsolved now, in any case
> _CID *requires* _HID to be present, and hence _HID has a priority in
> enumeration. It doesn't matter if it's absent now (it's even more flexible in
Just to be crystal clear
"It doesn't matter if _CID is absent now..."
> case MIPI decides to use _another_ ID for _CID) as long as software uses
> _HID for enumeration.
>
> > > }
> > > }
> > > Else
> > > {
> > > Return (I2ID) /* \_SB_.I2ID */
> > > }
> > > }
> > >
> > > ...
> > > }
--
With Best Regards,
Andy Shevchenko
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