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Message-ID: <0815ab39-8796-4719-bec5-489aace1cb7c@collabora.com>
Date:   Thu, 19 Oct 2023 11:07:47 +0200
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Subject: Re: [PATCH v10 14/24] drm/mediatek: Power on/off devices with
 function pointers
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To:     Hsiao Chien Sung <shawn.sung@mediatek.com>,
        CK Hu <ck.hu@mediatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>
Cc:     Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>, Fei Shao <fshao@chromium.org>,
        Sean Paul <sean@poorly.run>,
        Johnson Wang <johnson.wang@mediatek.corp-partner.google.com>,
        "Nancy . Lin" <nancy.lin@mediatek.com>,
        Moudy Ho <moudy.ho@mediatek.com>,
        "Jason-JH . Lin" <jason-jh.lin@mediatek.com>,
        Nathan Lu <nathan.lu@mediatek.com>, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-mediatek@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org
References: <20231019055619.19358-1-shawn.sung@mediatek.com>
 <20231019055619.19358-15-shawn.sung@mediatek.com>
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>
In-Reply-To: <20231019055619.19358-15-shawn.sung@mediatek.com>
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Il 19/10/23 07:56, Hsiao Chien Sung ha scritto:
> Different from OVL, OVL adaptor is a pseudo device so we didn't
> define it in the device tree, consequently, pm_runtime_resume_and_get()
> called by .atomic_enable() powers on no device. For this reason, we
> implement a function to power on the RDMAs in OVL adaptor, and the
> system will make sure the IOMMUs are powered on as well because of the
> device link (iommus) in the RDMA nodes in DTS.
> 
> This patch separates power and clock management process, it would be
> easier to maintain and extensions.
> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>