linux-kernel - Re: [PATCH 06/12] remoteproc: qcom_q6v5

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Date: Tue, 21 May 2024 13:01:05 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: neil.armstrong@...aro.org
Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Loic Poulain <loic.poulain@...aro.org>, Kalle Valo <kvalo@...nel.org>, 
	Mathieu Poirier <mathieu.poirier@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, linux-kernel@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, wcn36xx@...ts.infradead.org, 
	linux-wireless@...r.kernel.org, linux-remoteproc@...r.kernel.org, 
	devicetree@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 06/12] remoteproc: qcom_q6v5_pas: switch to mbn files by default

On Tue, 21 May 2024 at 12:49, <neil.armstrong@...aro.org> wrote:
>
> On 21/05/2024 11:45, Dmitry Baryshkov wrote:
> > We have been pushing userspace to use mbn files by default for ages.
> > As a preparation for making the firmware-name optional, make the driver
> > use .mbn instead of .mdt files by default.
>
> I think we should have a mechanism to fallback to .mdt since downstream
> uses split mdt on the devices filesystem.
>
> Perhaps only specify .firmware_name = "adsp" and add a list of allowed extension
> it will try in a loop ?

Such loops can cause unnecessary delays if the
CONFIG_FW_LOADER_USER_HELPER is enabled.
Since it is not possible to use vendor's firmware partition as is (you
have to either bind-mount a subdir or use a plenty of symlinks) one
might as well symlink .mbn to .mdt file.
Another option is to explicitly specify something like `firmware-name
= "./adsp.mdt";'

But yes, this whole series is a balance of pros and cons, as it was
discussed last week.

-- 
With best wishes
Dmitry