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Message-ID: <55eec0effd6cd08edbb130ec7f74ad993a75907d.camel@mediatek.com>
Date: Fri, 2 Sep 2022 15:44:57 +0800
From: CK Hu <ck.hu@...iatek.com>
To: Bo-Chen Chen <rex-bc.chen@...iatek.com>, <chunkuang.hu@...nel.org>,
<p.zabel@...gutronix.de>, <daniel@...ll.ch>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <matthias.bgg@...il.com>, <deller@....de>,
<airlied@...ux.ie>
CC: <msp@...libre.com>, <granquet@...libre.com>,
<jitao.shi@...iatek.com>, <wenst@...omium.org>,
<angelogioacchino.delregno@...labora.com>,
<liangxu.xu@...iatek.com>, <dri-devel@...ts.freedesktop.org>,
<linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-fbdev@...r.kernel.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH v17 07/10] drm/mediatek: dp: Determine device of
next_bridge
Hi, Bo-Chen:
On Thu, 2022-09-01 at 12:41 +0800, Bo-Chen Chen wrote:
> It's not necessary to have a next_bridge for DP device, so we add
> this
> patch to judge this.
Reviewed-by: CK Hu <ck.hu@...iatek.com>
>
> Signed-off-by: Bo-Chen Chen <rex-bc.chen@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_dp.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
> b/drivers/gpu/drm/mediatek/mtk_dp.c
> index 136e13150281..e37c9185e4ec 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dp.c
> @@ -1886,7 +1886,10 @@ static int mtk_dp_probe(struct platform_device
> *pdev)
> "failed to request dp irq
> resource\n");
>
> mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node,
> 1, 0);
> - if (IS_ERR(mtk_dp->next_bridge))
> + if (IS_ERR(mtk_dp->next_bridge) &&
> + PTR_ERR(mtk_dp->next_bridge) == -ENODEV)
> + mtk_dp->next_bridge = NULL;
> + else if (IS_ERR(mtk_dp->next_bridge))
> return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge),
> "Failed to get bridge\n");
>
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