linux-kernel - Re: [PATCH v8 15/23] drm/mediatek: Manage component's clock with function pointers

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Date:   Tue, 17 Oct 2023 13:57:12 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Shawn Sung (宋孝謙) 
        <Shawn.Sung@...iatek.com>,
        CK Hu (胡俊光) <ck.hu@...iatek.com>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
Cc:     Yongqiang Niu (牛永强) 
        <yongqiang.niu@...iatek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
        Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Nathan Lu (呂東霖) <Nathan.Lu@...iatek.com>,
        "airlied@...il.com" <airlied@...il.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "fshao@...omium.org" <fshao@...omium.org>,
        "johnson.wang@...iatek.corp-partner.google.com" 
        <johnson.wang@...iatek.corp-partner.google.com>
Subject: Re: [PATCH v8 15/23] drm/mediatek: Manage component's clock with
 function pointers

Il 17/10/23 12:50, Shawn Sung (宋孝謙) ha scritto:
> Hi Angelo,
> 
> On Tue, 2023-10-17 at 11:47 +0200, AngeloGioacchino Del Regno wrote:
>> Il 16/10/23 12:40, Hsiao Chien Sung ha scritto:
>>> By registering component related functions to the pointers,
>>> we can easily manage them within a for-loop and simplify the
>>> logic of clock control significantly.
>>>
>>> Reviewed-by: CK Hu <ck.hu@...iatek.com>
>>> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
>>> ---
>>>    .../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c   | 111 +++++++----
>>> -------
>>>    1 file changed, 44 insertions(+), 67 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
>>> b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
>>> index 60e5dfe9ef0d..fffef2a4f919 100644
>>> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
>>> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
>>> @@ -53,6 +53,7 @@ struct ovl_adaptor_comp_match {
>>>    	enum mtk_ovl_adaptor_comp_type type;
>>>    	enum mtk_ddp_comp_id comp_id;
>>>    	int alias_id;
>>> +	const struct mtk_ddp_comp_funcs *funcs;
>>>    };
>>>    
>>>    struct mtk_disp_ovl_adaptor {
>>> @@ -67,20 +68,35 @@ static const char * const
>>> private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
>>>    	[OVL_ADAPTOR_TYPE_MERGE]	= "merge",
>>>    };
>>>    
>>> +static const struct mtk_ddp_comp_funcs _ethdr = {
>>
>> Sorry I just noticed that; can you please remove the leading "_" from
>> all
>> of those?
>>
>> _ethdr -> ethdr or mtk_ethdr
>> _merge -> merge or mtk_merge
>> _rdma  -> rdma  or mtk_rdma
>>
>> Thanks,
>> Angelo
>>
> 
> Sure. Will do in the next version.
> The reason I didn't use mtk_* is simply because of the column width
> will exceed 100 characaters.
> 

Okay that would not be good, I guess that just `ethdr`, `merge`, `rdma` will
be fine then.

Cheers,
Angelo

> Thanks,
> Shawn