linux-kernel - Re: [PATCH v1 RESEND 2/2] drm/panfrost: Add basic support for speed binning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <fb19c82b-f2bf-7f22-ba5c-e1a1c98f987f@collabora.com>
Date:   Fri, 31 Mar 2023 10:57:46 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Boris Brezillon <boris.brezillon@...labora.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     airlied@...il.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        steven.price@....com, robh+dt@...nel.org,
        alyssa.rosenzweig@...labora.com, wenst@...omium.org,
        kernel@...labora.com
Subject: Re: [PATCH v1 RESEND 2/2] drm/panfrost: Add basic support for speed
 binning

Il 31/03/23 10:49, Boris Brezillon ha scritto:
> On Fri, 31 Mar 2023 10:11:07 +0200
> AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> wrote:
> 
>> Il 23/03/23 10:08, AngeloGioacchino Del Regno ha scritto:
>>> Some SoCs implementing ARM Mali GPUs are subject to speed binning:
>>> this means that some versions of the same SoC model may need to be
>>> limited to a slower frequency compared to the other:
>>> this is being addressed by reading nvmem (usually, an eFuse array)
>>> containing a number that identifies the speed binning of the chip,
>>> which is usually related to silicon quality.
>>>
>>> To address such situation, add basic support for reading the
>>> speed-bin through nvmem, as to make it possible to specify the
>>> supported hardware in the OPP table for GPUs.
>>> This commit also keeps compatibility with any platform that does
>>> not specify (and does not even support) speed-binning.
>>>
>>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>>
>> Hello maintainers,
>> I've seen that this got archived in the dri-devel patchwork; because of that and
>> only that, I'm sending this ping to get this patch reviewed.
> 
> Looks good to me. If you can get a DT maintainer to review the binding
> (Rob?), I'd be happy to queue the series to drm-misc-next.
> 

The binding was acked by Krzysztof already... so, just to be sure:

Krzysztof, can the binding [1] get picked?

Cheers,
Angelo

[1]: 
https://lore.kernel.org/all/20230323090822.61766-2-angelogioacchino.delregno@collabora.com/