Add MT8195 DisplayPort driver

[PATCH v17 07/10] drm/mediatek: dp: Determine device of next_bridge

Posted by Bo-Chen Chen 2 years ago

It's not necessary to have a next_bridge for DP device, so we add this
patch to judge this.

Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.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");
 
-- 
2.18.0

Re: [PATCH v17 07/10] drm/mediatek: dp: Determine device of next_bridge

Posted by CK Hu 2 years ago

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@mediatek.com>

> 
> Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.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");
>