linux-kernel - Re: [PATCH 2/3] ASoC: qcom: q6apm: add support for reading firmware name from DT

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Date:   Wed, 28 Jun 2023 19:10:50 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        krzysztof.kozlowski+dt@...aro.org, andersson@...nel.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, johan+linaro@...nel.org,
        perex@...ex.cz, tiwai@...e.com, lgirdwood@...il.com,
        ckeepax@...nsource.cirrus.com, kuninori.morimoto.gx@...esas.com,
        linux-kernel@...r.kernel.org, pierre-louis.bossart@...ux.intel.com,
        alsa-devel@...a-project.org
Subject: Re: [PATCH 2/3] ASoC: qcom: q6apm: add support for reading firmware
 name from DT

On Wed, Jun 28, 2023 at 07:57:38PM +0300, Dmitry Baryshkov wrote:
> On 28/06/2023 14:53, Mark Brown wrote:

> > Why not try a series of firmware names/locations generated using the
> > identifying information for the card/system?  That way we don't have to
> > put a filename in the ABI which has fun scaling issues.

> This is what was done by Srini in the initial (currently committed) version.
> Unfortunately this easily results in the audio topology being separated from
> the rest of the platform-specific firmware. For example, for the mentioned
> X13s we already have a subdir under /lib/firmware/qcom and several
> firmware-name DT properties pointing to the files in that subdir:

> $ grep firmware-name
> arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> 		firmware-name = "qcom/sc8280xp/LENOVO/21BX/qcdxkmsuc8280.mbn";
> 	firmware-name = "qcom/sc8280xp/LENOVO/21BX/qcadsp8280.mbn";
> 	firmware-name = "qcom/sc8280xp/LENOVO/21BX/qccdsp8280.mbn";

> This is not unique to the X13s, other Qualcomm boards also use full paths.

If the goal here is to put all the firmwares for a given board in a
single place surely it would be better to factor this all out of the
individual drivers so that they ask some helper for a directory to use
for firmware?  Adding these device specific firmware node properties
doesn't seem to follow.

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