linux-kernel - Re: [PATCH v3 00/11] Panfrost: Improve and add MediaTek SoCs support

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Date:   Fri, 24 Feb 2023 17:43:04 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     airlied@...il.com, daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, steven.price@....com,
        alyssa.rosenzweig@...labora.com, matthias.bgg@...il.com,
        robh@...nel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 00/11] Panfrost: Improve and add MediaTek SoCs support

On Thu, Feb 23, 2023 at 9:34 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Changes in v3:
>  - Changed MT8186 bindings to declare only two power domains
>  - Added a commit introducing MT8186 specific platform data to
>    panfrost_drv
>
> Changes in v2:
>  - Add power-domain-names commit from Chen-Yu to the series
>  - Kept sram-supply in base schema, overridden for non-MediaTek
>  - Added Reviewed-by tags from Steven Price to the driver commits
>    (as released in reply to v1's cover letter - thanks!)
>
> 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;
>
> 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.
>
> 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 (7):
>   dt-bindings: gpu: mali-bifrost: Split out MediaTek power-domains
>     variation
>   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 support for MediaTek MT8186
>   drm/panfrost: Add new compatible for Mali on the MT8183 SoC
>   drm/panfrost: Add support for Mali on the MT8186 SoC
>
> Chen-Yu Tsai (1):
>   dt-bindings: gpu: mali-bifrost: Add power-domain-names to base schema

Tested-by: Chen-Yu Tsai <wenst@...omium.org>

on MT8183 Juniper, MT8192 Hayato, MT8195 Tomato, MT8186 not-yet-upstreamed
device.