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Message-ID: <41158f1f-b281-8d77-c5f3-f67adb0b2fde@broadcom.com>
Date:   Thu, 24 Nov 2022 14:47:53 +0100
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Subject: Re: AP6275 / bcm43752 pcie on mainline brcmf
To:     Andy Green <andy@warmcat.com>, Shengyu Qu <wiagn233@outlook.com>
Cc:     franky.lin@broadcom.com, linux-wireless@vger.kernel.org
References: <TY3P286MB26114DD461F50814980453E598029@TY3P286MB2611.JPNP286.PROD.OUTLOOK.COM>
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 <f80c4a64-d987-0f59-418d-adf419fcb054@warmcat.com>
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 <d04547d3-4081-4047-3206-6d7c750720dc@warmcat.com>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
In-Reply-To: <d04547d3-4081-4047-3206-6d7c750720dc@warmcat.com>
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On 11/24/2022 1:54 PM, Andy Green wrote:
> [   17.202348] brcmfmac: brcmf_escan_prep ### List of SSIDs to scan ### 1
> [   17.202350] brcmfmac: brcmf_escan_prep 0: Broadcast scan
> [   17.202352] brcmfmac: brcmf_fil_iovar_data_set ifidx=0, name=escan, 
> len=180
> [   17.204223] brcmfmac: brcmf_fil_cmd_data Firmware error: BCME_VERSION 
> (-37)
> root@inmusic-az04-mpc:~# [   44.202645] ieee80211 phy0: brcmf_run_escan: 
> error (-52)
> [   44.202649] ieee80211 phy0: brcmf_cfg80211_scan: scan error (-52)

The root cause is easy. Basically the brcmfmac driver is not on par with 
the firmware. brcmfmac uses escan api version 1 and firmware expects 
version 2. Fixing it is going to be more difficult. Things start to 
diverge on firmware API level. I already had a patch on the shelf 
supporting version 2, but it does not match the API your firmware expects.

I was working on supporting multiple vendors, but I need some rework. 
The scanning issue confirms the need for per-vendor support. Hopefully I 
can spend some time on it.

Regards,
Arend

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