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Message-ID: <0815ab39-8796-4719-bec5-489aace1cb7c@collabora.com>
Date: Thu, 19 Oct 2023 11:07:47 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Hsiao Chien Sung <shawn.sung@...iatek.com>,
CK Hu <ck.hu@...iatek.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Rob Herring <robh+dt@...nel.org>
Cc: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Fei Shao <fshao@...omium.org>,
Sean Paul <sean@...rly.run>,
Johnson Wang <johnson.wang@...iatek.corp-partner.google.com>,
"Nancy . Lin" <nancy.lin@...iatek.com>,
Moudy Ho <moudy.ho@...iatek.com>,
"Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
Nathan Lu <nathan.lu@...iatek.com>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v10 14/24] drm/mediatek: Power on/off devices with
function pointers
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@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
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