[PATCH] i3c: master: dw-i3c-master: fix OD timing for first broadcast

[Datta, Shubhrajyoti]

 > -----Original Message-----
 > From: NG, TZE YEE <tze.yee.ng at altera.com>
 > Sent: Friday, July 17, 2026 8:34 AM
 > To: Datta, Shubhrajyoti <shubhrajyoti.datta at amd.com>; Guntupalli, 
Manikanta
 > <manikanta.guntupalli at amd.com>; S-k, Shyam-sundar <Shyam-sundar.S-
 > k at amd.com>; Goud, Srinivas <srinivas.goud at amd.com>
 > Cc: linux-i3c at lists.infradead.org; Frank.Li at kernel.org; Frank Li
 > <Frank.li at oss.nxp.com>
 > Subject: Re: RE: RE: RE: [PATCH] i3c: master: dw-i3c-master: fix OD 
timing for
 > first broadcast
 >
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 >
 >
 > On 9/7/2026 5:09 pm, Datta, Shubhrajyoti wrote:
 > > [You don't often get email from shubhrajyoti.datta at amd.com. Learn why
 > > this is important at https://aka.ms/LearnAboutSenderIdentification ]
 > >
 > > AMD General
 > >
 >
...

 > >>>
 > >>> Caution: This message originated from an External Source. Use proper
 > >>> caution when opening attachments, clicking links, or responding.
 > >>>
 > >>>
 > >>> On 1/7/2026 5:06 pm, Guntupalli, Manikanta wrote:
 > >>>> Public
 > >>>>
 > >>>> Hi,
 > >>>>
 > >>>> Adding the below contact:
 > >>>> + at Datta, Shubhrajyoti
 > >>>>
 > >>>> Thanks,
 > >>>> Manikanta
 > >>>>
 > >>>
 > >>> Hi Manikanta, Datta,
 > >>>
 > >>> Gentle follow-up on the AMD AMDI0015 quirk question below. It has
 > >>> been about a week since Datta was brought into the thread, and I
 > >>> have not received guidance yet on how ->set_speed() and
 > >>> send_ccc_cmd() should interact with AMD_I3C_OD_PP_TIMING.
 > >>
 > >> Will check this and get back.
 > > This quirk is added for the AMD legacy platform
 > > https://lore.kernel.org/all/20241114110239.660551-3-Shyam-sundar.S-k@a
 > > md.com/
 > >
 > > added shyam .
 >
 > Hi Manikanta, Datta, Shyam,
 >
 > Gentle follow-up. I still have not received confirmed guidance on how
 > ->set_speed() should interact with AMD_I3C_OD_PP_TIMING on AMDI0015.
 >
 > Rather than waiting further, I would like to continue the upstream 
process with
 > - od_cnt calculation fix (per Sashiko's review)
 > - using  PM_RUNTIME_ACQUIRE (per Frank's review)
 > - send an AMD-specific follow-up based on a best-effort assumption 
for the
 > AMD quirk platform.
 >
 > Could AMD help test that follow-up once posted?


I have access to only KSB boards I do not have access to the acpi legacy 
platforms. I will let someone who has access to it comment.

 >
 > If you prefer a different AMD behavior, please let me know; otherwise 
I will
 > proceed with that plan.
 >
 > Thanks,
 > Tze Yee