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RE: [PATCH v3 3/4] wifi: rtw88: set pkg_type correctly for specific rtw8821c variants

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> -----Original Message-----
> From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Sent: Tuesday, April 18, 2023 4:58 PM
> To: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
> Cc: linux-wireless <linux-wireless@xxxxxxxxxxxxxxx>; Hans Ulli Kroll <linux@xxxxxxxxxxxxx>; Larry Finger
> <Larry.Finger@xxxxxxxxxxxx>; Tim K <tpkuester@xxxxxxxxx>; Alex G . <mr.nuke.me@xxxxxxxxx>; Nick Morrow
> <morrownr@xxxxxxxxx>; Viktor Petrenko <g0000ga@xxxxxxxxx>; Andreas Henriksson <andreas@xxxxxxxx>;
> ValdikSS <iam@xxxxxxxxxxxxxxx>; kernel@xxxxxxxxxxxxxx
> Subject: Re: [PATCH v3 3/4] wifi: rtw88: set pkg_type correctly for specific rtw8821c variants
> 
> On Tue, Apr 18, 2023 at 12:36:31AM +0000, Ping-Ke Shih wrote:
> >
> >
> > > -----Original Message-----
> > > From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> > > Sent: Monday, April 17, 2023 10:04 PM
> > > To: linux-wireless <linux-wireless@xxxxxxxxxxxxxxx>
> > > Cc: Hans Ulli Kroll <linux@xxxxxxxxxxxxx>; Larry Finger <Larry.Finger@xxxxxxxxxxxx>; Ping-Ke Shih
> > > <pkshih@xxxxxxxxxxx>; Tim K <tpkuester@xxxxxxxxx>; Alex G . <mr.nuke.me@xxxxxxxxx>; Nick Morrow
> > > <morrownr@xxxxxxxxx>; Viktor Petrenko <g0000ga@xxxxxxxxx>; Andreas Henriksson <andreas@xxxxxxxx>;
> > > ValdikSS <iam@xxxxxxxxxxxxxxx>; kernel@xxxxxxxxxxxxxx; Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> > > Subject: [PATCH v3 3/4] wifi: rtw88: set pkg_type correctly for specific rtw8821c variants
> > >
> > > According to the vendor driver the pkg_type has to be set to '1'
> > > for some rtw8821c variants. As the pkg_type has been hardcoded to
> > > '0', add a field for it in struct rtw_hal and set this correctly
> > > in the rtw8821c part.
> > > With this parsing of a rtw_table is influenced and check_positive()
> > > in phy.c returns true for some cases here. The same is done in the
> > > vendor driver. However, this has no visible effect on the driver
> > > here.
> >
> > I agree this patch, but still want to know more about the meaning of
> > "...no visible effect...". Do you mean your USB device works well with/without
> > this patch? or, IO is absolutely the same when loading parameters with
> > check_positive()?
> 
> Yes, it works with and without this patch. With this patch
> check_positive() returns true in some cases whereas without this patch
> check_positive always returns false.
> I don't know at all what effect this change could have, maybe I just
> need the right test case to verify it really makes a change.
> 
> I just realized that something like the below is missing, as the
> cond.rfe part needs the raw rfe value from fuses >> 3.
> 
> Maybe we just take 1/4 and 2/4 and drop the others. I am running out of
> time for further debugging RTW8821C which is a chip our customer isn't
> interested in.
> 

I think we can take all patches, because they go forward to correct direction,
and other flaws can be fixed after people can really get that kind of modules.

Ping-Ke




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