linux-kernel - Re: [PATCH v2 13/15] drm/mediatek: mtk_hdmi_common: Assign DDC adapter pointer to bridge

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Message-ID: <c0e144b3a90881066d0974157e66ac23f09a0fc5.camel@mediatek.com>
Date: Mon, 9 Dec 2024 08:17:48 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
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	<mripard@...nel.org>, Jitao Shi (石记涛)
	<jitao.shi@...iatek.com>, "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>, "dri-devel@...ts.freedesktop.org"
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	<junzhi.zhao@...iatek.com>
Subject: Re: [PATCH v2 13/15] drm/mediatek: mtk_hdmi_common: Assign DDC
 adapter pointer to bridge

Hi, Angelo:

On Thu, 2024-12-05 at 12:45 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> In preparation for adding the new HDMI TX v2 IP driver, assign the
> pointer to the DDC adapter to struct drm_bridge during probe.
> 
> This commit brings no functional changes.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi_common.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
> index 1b23ab6969ec..4f708b04f5e8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
> @@ -410,6 +410,7 @@ struct mtk_hdmi *mtk_hdmi_common_probe(struct platform_device *pdev)
>         hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
>         hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
>         hdmi->bridge.of_node = pdev->dev.of_node;
> +       hdmi->bridge.ddc = hdmi->ddc_adpt;

I don't know why only v2 driver need to assign this?
Could you point out the code where access this value?

Regards,
CK

> 
>         ret = devm_drm_bridge_add(dev, &hdmi->bridge);
>         if (ret)
> --
> 2.47.0
>