linux-kernel - Re: [PATCH v1 17/17] drm/mediatek: Add mt8195-dpi support to drm

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Message-ID: <CABnWg9s3N_Ua9g0S3x0uj8PN4FtOX6DO+zQcBzGFqoLTL1J24A@mail.gmail.com>
Date:   Tue, 27 Sep 2022 06:04:11 -0700
From:   Guillaume Ranquet <granquet@...libre.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Vinod Koul <vkoul@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>, Jitao shi <jitao.shi@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        Pablo Sun <pablo.sun@...iatek.com>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mattijs Korpershoek <mkorpershoek@...libre.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v1 17/17] drm/mediatek: Add mt8195-dpi support to drm_drv

On Thu, 22 Sep 2022 09:20, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>On 19/09/2022 18:56, Guillaume Ranquet wrote:
>> Add dpi support to enable the HDMI path.
>>
>> Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
>> index 72049a530ae1..27f029ca760b 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
>> @@ -820,6 +820,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
>>  	  .data = (void *)MTK_DPI },
>>  	{ .compatible = "mediatek,mt8192-dpi",
>>  	  .data = (void *)MTK_DPI },
>> +	{ .compatible = "mediatek,mt8195-dpi",
>> +	  .data = (void *)MTK_DPI },
>
>It's compatible with the others. You don't need more compatibles.

Hi Krzysztof,

It's a bit confusing, because this compatible is used in both
mtk_drm_drv.c and in mtk_dpi.c

Albeit it's entirely the same thing regarding the mtk_drm_drv module,
it's pretty different
regarding the mtk_dpi module.

Thx,
Guillaume.
>
>Best regards,
>Krzysztof
>