linux-kernel - Re: [PATCH v6 3/9] mtk-mdp: use pm

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Date:   Mon, 16 Aug 2021 09:07:42 +0800
From:   houlong wei <houlong.wei@...iatek.com>
To:     Eizan Miyamoto <eizan@...omium.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "wenst@...omium.org" <wenst@...omium.org>,
        "Yong Wu (吴勇)" <Yong.Wu@...iatek.com>,
        "enric.balletbo@...labora.com" <enric.balletbo@...labora.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "Andrew-CT Chen (陳智迪)" 
        <Andrew-CT.Chen@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "Minghsiu Tsai (蔡明修)" 
        <Minghsiu.Tsai@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>, <houlong.wei@...iatek.com>
Subject: Re: [PATCH v6 3/9] mtk-mdp: use pm_runtime in MDP component driver

On Mon, 2021-08-02 at 20:12 +0800, Eizan Miyamoto wrote:
> Without this change, the MDP components are not fully integrated into
> the runtime power management subsystem, and the MDP driver does not
> work.
> 
> For each of the component device drivers to be able to call
> pm_runtime_get/put_sync() a pointer to the component's device struct
> had to be added to struct mtk_mdp_comp, set by mtk_mdp_comp_init().
> 
> Note that the dev argument to mtk_mdp_comp_clock_on/off() has been
> removed. Those functions used to be called from the "master" mdp
> driver
> in mtk_mdp_core.c, but the component's device pointer no longer
> corresponds to the mdp master device pointer, which is not the right
> device to pass to pm_runtime_put/get_sync() which we had to add to
> get
> the driver to work properly.
> 
> Signed-off-by: Eizan Miyamoto <eizan@...omium.org>
> ---
> 

Reviewed-by: Houlong Wei <houlong.wei@...iatek.com>

> (no changes since v1)
> 
[...]