Re: [PATCH v29 01/33] xhci: support setting interrupt moderation IMOD for secondary interrupters

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On Tue, Oct 22, 2024 at 03:56:44PM +0200, Takashi Iwai wrote:
> On Fri, 18 Oct 2024 07:52:35 +0200,
> Greg KH wrote:
> > 
> > On Thu, Oct 17, 2024 at 05:07:12PM -0700, Wesley Cheng wrote:
> > > Hi Greg,
> > > 
> > > On 10/16/2024 11:40 PM, Greg KH wrote:
> > > > On Tue, Oct 15, 2024 at 02:28:43PM -0700, Wesley Cheng wrote:
> > > >> From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> > > >>
> > > >> Allow creators of xHCI secondary interrupters to specify the interrupt
> > > >> moderation interval value in nanoseconds when creating the interrupter.
> > > >>
> > > >> If not sure what value to use then use the xhci driver default
> > > >> xhci->imod_interval
> > > >>
> > > >> Suggested-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx>
> > > >> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> > > >> Link: https://lore.kernel.org/r/20240905143300.1959279-13-mathias.nyman@xxxxxxxxxxxxxxx
> > > >> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > > >> ---
> > > >>  drivers/usb/host/xhci-mem.c | 8 +++++++-
> > > >>  drivers/usb/host/xhci.c     | 4 ++--
> > > >>  drivers/usb/host/xhci.h     | 5 ++++-
> > > >>  3 files changed, 13 insertions(+), 4 deletions(-)
> > > > This is already in 6.12-rc1, which makes me confused as to what tree you
> > > > made this series against.
> > > 
> > > Sorry, I didn't fetch the latest changes from usb-next.
> > 
> > It wasn't even usb-next, it was 6.12-rc1, so I don't know what tree you
> > based this on :(
> > 
> > > In this case, should I rebase and resbumit?
> > 
> > As the series can't be applied as-is, probably.  But I think you might
> > want to collect some acks from the sound people and xhci developers, as
> > I can't do anything with this until they look at the changes.
> 
> Honestly speaking, I couldn't follow fully the discussions about the
> fundamental design -- IIRC, Pierre and others had concerns to the way
> to manage the offload device via kcontrols.  Did we get consensus?

I don't think so.

> I believe that's the biggest obstacle in the audio side, i.e. what's
> visible to users.  The kernel internals can be corrected at any time
> later.

I would like to see that agreed on before I even look at the usb side.

thanks,

greg k-h




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