Message-ID: <7e08656f-4908-43e3-57d6-2928b1eb12d5@arm.com>
Date:   Wed, 8 Feb 2023 15:11:47 +0000
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Subject: Re: [PATCH 0/9] Panfrost: Improve and add MediaTek SoCs support
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To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>, airlied@gmail.com
Cc:     daniel@ffwll.ch, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, tomeu.vizoso@collabora.com,
        alyssa.rosenzweig@collabora.com, matthias.bgg@gmail.com,
        robh@kernel.org, dri-devel@lists.freedesktop.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
References: <20230208103709.116896-1-angelogioacchino.delregno@collabora.com>
From:   Steven Price <steven.price@arm.com>
In-Reply-To: <20230208103709.116896-1-angelogioacchino.delregno@collabora.com>
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On 08/02/2023 10:37, AngeloGioacchino Del Regno wrote:
> This series adds support for new MediaTek SoCs (MT8186/MT8192/MT8195)
> and improves MT8183 support: since the mtk-regulator-coupler driver
> was picked, it is now useless for Panfrost to look for, and manage,
> two regulators (GPU Vcore and GPU SRAM) on MediaTek;

Yay! ;) I never did like Panfrost dealing with two regulators.

> The aforementioned driver will take care of keeping the voltage
> relation (/constraints) of the two regulators on its own when a
> voltage change request is sent to the Vcore, solving the old time
> issue with not working DVFS on Panfrost+MediaTek (due to devfreq
> supporting only single regulator).
> 
> In the specific case of MT8183, in order to not break the ABI, it
> was necessary to add a new compatible for enabling DVFS.

It's a shame to need a new compatible, but it seems sensible to me.

For the panfrost changes:

Reviewed-by: Steven Price <steven.price@arm.com>

I'll let others comment on the DT binding changes.

Thanks,

Steve

> Alyssa Rosenzweig (3):
>   drm/panfrost: Increase MAX_PM_DOMAINS to 5
>   drm/panfrost: Add the MT8192 GPU ID
>   drm/panfrost: Add mediatek,mt8192-mali compatible
> 
> AngeloGioacchino Del Regno (6):
>   dt-bindings: gpu: mali-bifrost: Don't allow sram-supply by default
>   dt-bindings: gpu: mali-bifrost: Allow up to 5 power domains for MT8192
>   dt-bindings: gpu: mali-bifrost: Add compatible for MT8195 SoC
>   dt-bindings: gpu: mali-bifrost: Add new MT8183 compatible
>   dt-bindings: gpu: mali-bifrost: Add a compatible for MediaTek MT8186
>   drm/panfrost: Add new compatible for Mali on the MT8183 SoC
> 
>  .../bindings/gpu/arm,mali-bifrost.yaml        | 68 +++++++++++++++++--
>  drivers/gpu/drm/panfrost/panfrost_device.h    |  2 +-
>  drivers/gpu/drm/panfrost/panfrost_drv.c       | 28 ++++++++
>  drivers/gpu/drm/panfrost/panfrost_gpu.c       |  8 +++
>  4 files changed, 99 insertions(+), 7 deletions(-)
>