linux-kernel - Re: [EXT] [RFC PATCH 0/4] mwifiex: add support for iw61x

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Message-ID: <ZtbQZRYyTbm6FyQ1@pengutronix.de>
Date: Tue, 3 Sep 2024 11:01:25 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: David Lin <yu-hao.lin@....com>
Cc: Francesco Dolcini <francesco@...cini.it>,
	Calvin Owens <calvin@...nvd.org>,
	Brian Norris <briannorris@...omium.org>,
	Kalle Valo <kvalo@...nel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>
Subject: Re: [EXT] [RFC PATCH 0/4] mwifiex: add support for iw61x

On Tue, Sep 03, 2024 at 07:57:51AM +0000, David Lin wrote:
> > From: Sascha Hauer <s.hauer@...gutronix.de>
> > Sent: Tuesday, September 3, 2024 3:52 PM
> > To: David Lin <yu-hao.lin@....com>
> > Cc: Francesco Dolcini <francesco@...cini.it>; Calvin Owens
> > <calvin@...nvd.org>; Brian Norris <briannorris@...omium.org>; Kalle Valo
> > <kvalo@...nel.org>; linux-wireless@...r.kernel.org;
> > linux-kernel@...r.kernel.org; kernel@...gutronix.de
> > Subject: Re: [EXT] [RFC PATCH 0/4] mwifiex: add support for iw61x
> > 
> > Caution: This is an external email. Please take care when clicking links or
> > opening attachments. When in doubt, report the message using the 'Report
> > this email' button
> > 
> > 
> > On Tue, Sep 03, 2024 at 07:35:59AM +0000, David Lin wrote:
> > > > From: Sascha Hauer <s.hauer@...gutronix.de>
> > > > Sent: Tuesday, September 3, 2024 3:30 PM
> > > > To: David Lin <yu-hao.lin@....com>
> > > > Cc: Francesco Dolcini <francesco@...cini.it>; Calvin Owens
> > > > <calvin@...nvd.org>; Brian Norris <briannorris@...omium.org>; Kalle
> > > > Valo <kvalo@...nel.org>; linux-wireless@...r.kernel.org;
> > > > linux-kernel@...r.kernel.org; kernel@...gutronix.de
> > > > Subject: Re: [EXT] [RFC PATCH 0/4] mwifiex: add support for iw61x
> > > >
> > > > Caution: This is an external email. Please take care when clicking
> > > > links or opening attachments. When in doubt, report the message
> > > > using the 'Report this email' button
> > > >
> > > >
> > > > On Tue, Sep 03, 2024 at 06:39:15AM +0000, David Lin wrote:
> > > > > > > > > Not only this code segment. In fact, you did not add VDLL
> > > > > > > > > data patch support
> > > > > > > > to sdio.c.
> > > > > > > > > If you try to add the code and do test, you will know what
> > > > > > > > > is missing in your
> > > > > > > > code.
> > > > > > > >
> > > > > > > > Could you point me to the code you mean?
> > > > > > > >
> > > > > > > > Sascha
> > > > > > > >
> > > > > > >
> > > > > > > I only know the porting VDLL code in nxpwifi.
> > > > > >
> > > > > > Yes, and I asked for a pointer to that code, some function name,
> > > > > > or file/line or whatever, because I looked at the nxpwifi driver
> > > > > > and don't know what you mean with "VDLL data patch support" in
> > sdio.c.
> > > > > >
> > > > > > Sascha
> > > > > >
> > > > >
> > > > > It is better for you to check MXM driver. It is the same as
> > > > > Mwifiex which
> > > > support all SDIO modes.
> > > >
> > > > Now I am confused. You said:
> > > >
> > > > > In fact, you did not add VDLL data patch support to sdio.c
> > > >
> > > > I was under the assumption that the nxpwifi driver that you
> > > > specifically posted for the iw61x chipset should contain this code. Isn't that
> > the case?
> > > >
> > > > BTW did you really mean "VDLL data patch" or did you mean "VDLL data
> > > > path"?
> > > >
> > >
> > > Sorry VDLL data path.
> > > You did not add the code to support this new SDIO data type in your patch.
> > >
> > > Please check MXM driver which supports all SDIO modes.
> > 
> > But why? The nxpwifi driver is much closer to the mwifiex driver and much
> > better readable, so I would rather pick the missing pieces from there.
> > 
> > Sascha
> > 
> 
> Nxpwifi only supports SDIO new mode. MXM and Mwifiex supports normal and new SDIO modes.

By SDIO new mode I assume that you mean the supports_sdio_new_mode
variable in the mwifiex driver. This is used when a chip supports it
The iw61x supports this new mode and the iw61x also is the only chip which
needs the VDLL code. So would I have to add something to the "normal"
SDIO mode?

Sascha

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