netdev - Re: [PATCH RFC v2 0/4] wifi: ath10k: support board-specific firmware overrides

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Message-ID: <CAA8EJpr6fRfY5pNz6cXVTaNashqffy5_qLv9c35nkgjaDuSgyQ@mail.gmail.com>
Date: Wed, 6 Mar 2024 11:23:21 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Kalle Valo <kvalo@...nel.org>
Cc: Jeff Johnson <quic_jjohnson@...cinc.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH RFC v2 0/4] wifi: ath10k: support board-specific firmware overrides

On Wed, 6 Mar 2024 at 11:04, Kalle Valo <kvalo@...nel.org> wrote:
>
> Dmitry Baryshkov <dmitry.baryshkov@...aro.org> writes:
>
> > On WCN3990 platforms actual firmware, wlanmdsp.mbn, is sideloaded to the
> > modem DSP via the TQFTPserv. These MBN files are signed by the device
> > vendor, can only be used with the particular SoC or device.
> >
> > Unfortunately different firmware versions come with different features.
> > For example firmware for SDM845 doesn't use single-chan-info-per-channel
> > feature, while firmware for QRB2210 / QRB4210 requires that feature.
> >
> > Allow board DT files to override the subdir of the fw dir used to lookup
> > the firmware-N.bin file decribing corresponding WiFi firmware.
> > For example, adding firmware-name = "qrb4210" property will make the
> > driver look for the firmware-N.bin first in ath10k/WCN3990/hw1.0/qrb4210
> > directory and then fallback to the default ath10k/WCN3990/hw1.0 dir.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > ---
> > Changes in v2:
> > - Fixed the comment about the default board name being NULL (Kalle)
> > - Expanded commit message to provide examples for firmware paths (Kalle)
> > - Added a note regarding board-2.bin to the commit message (Kalle)
> > - Link to v1: https://lore.kernel.org/r/20240130-wcn3990-firmware-path-v1-0-826b93202964@linaro.org
>
> From my point of view this looks good now but let's see what others say.
> Is there a specific reason why you marked this as RFC still?

No, I just forgot to remove it from the series settings, so you can
consider it as final.

I had one minor question in my head (but that's mostly for patches 3
and 4): in linux-firmware we will have ath10k/WCN3990/hw1.0/qcm2290
and make qrb4210 as a symlink to it. Is that fine from your POV? Or
should we use sensible device names (e.g. qcom-rb1)?




-- 
With best wishes
Dmitry