linux-kernel - Re: [PATCH] brcmfmac: fix RSSI report in AP mode

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Message-ID: <CAG17S_MYhPCuDryf2Meh64iZPAc-NnHyPwEv4oQdww9QNr0j6g@mail.gmail.com>
Date: Mon, 9 Dec 2024 15:43:01 -0600
From: KeithG <ys3al35l@...il.com>
To: Alex Shumsky <alexthreed@...il.com>
Cc: Arend van Spriel <arend.vanspriel@...adcom.com>, linux-wireless@...r.kernel.org, 
	Alexey Berezhok <a@...repo.ru>, Alvin Šipraga <ALSI@...g-olufsen.dk>, 
	Hector Martin <marcan@...can.st>, Janne Grunau <j@...nau.net>, Kalle Valo <kvalo@...nel.org>, 
	Kees Cook <kees@...nel.org>, Neal Gompa <neal@...pa.dev>, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, brcm80211-dev-list.pdl@...adcom.com, 
	brcm80211@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] brcmfmac: fix RSSI report in AP mode

>From my updated aarch64 RPiOS Bookworm as of today, it is:
Firmware: BCM4345/6 wl0: Aug 29 2023 01:47:08 version 7.45.265 (28bca26
CY) FWID 01-b677b91b

On Mon, Dec 9, 2024 at 3:08 PM Alex Shumsky <alexthreed@...il.com> wrote:
>
> On Tue, Nov 26, 2024 at 2:13 PM Arend van Spriel
> <arend.vanspriel@...adcom.com> wrote:
> >
> > On 11/22/2024 10:03 PM, Alex Shumsky wrote:
> > > After commit 9a1590934d9a ("brcmfmac: correctly report average RSSI in
> > > station info") it is required from firmware to provide rx_lastpkt_rssi.
> > > If this field is not provided brcmfmac doesn't report any RSSI at all.
> > > Unfortunately some firmwares doesn't provide it. One example is firmware
> > > for BCM43455 found in Raspbberry Pi.
> > > See https://github.com/raspberrypi/linux/issues/4574
> > >
> > > Fix it by falling back to rssi field if rx_lastpkt_rssi is not provided
> > > (like it was before 9a1590934d9a).
> >
> > Sounds like a reasonable approach. However, I would like to learn more
> > about the issue. Maybe it is a per-vendor issue so I am interested what
> > the sta_info version is that we get from firmware. It is printed in
> > brcmf_cfg80211_get_station() with brcmf_dbg(). You can make it a
> > bphy_err() call instead or enable TRACE level debug messages in the driver.
> >
> > Also would be good to know the firmware version and kernel version of
> > the BCM43455.
> >
> > Regards,
> > Arend
>
> I've just checked sta version in trace logs:
> brcmf_cfg80211_get_station version 4
>
> Firmware I currently use:
> BCM4345/6 wl0: Aug 29 2023 01:47:08 version 7.45.265 (28bca26 CY) FWID
> 01-b677b91b
> https://github.com/murata-wireless/cyw-fmac-fw/blob/e024d0c0a3ab241f547cb44303de7e1b49f0ca78/cyfmac43455-sdio.bin
>
> I'm not sure what firmware version is used in the raspberry pi distro.
> From raspberry forums it looks, like:
> Firmware: BCM4345/6 wl0: Nov 1 2021 00:37:25 version 7.45.241 (1a2f2fa
> CY) FWID 01-703fd60
>