linux-kernel - Re: [PATCH] drm/exynos/dsi: Remove error handling for bridge

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Message-id: <593FAF9E.1040406@samsung.com>
Date:   Tue, 13 Jun 2017 18:25:50 +0900
From:   Inki Dae <inki.dae@...sung.com>
To:     Hoegeun Kwon <hoegeun.kwon@...sung.com>, jy0922.shim@...sung.com,
        sw0312.kim@...sung.com, airlied@...ux.ie, kgene@...nel.org,
        krzk@...nel.org
Cc:     javier@....samsung.com, a.hajda@...sung.com,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/exynos/dsi: Remove error handling for bridge_node
 DT parsing



2017년 06월 09일 18:23에 Hoegeun Kwon 이(가) 쓴 글:
> The bridge_node is unnecessary between FIMD and DSIM. If don't remove
> error handling, it will not work between FIMD and DSIM. So remove
> error handling.

Please make sure to describe why bridge_node is unnecessary.
For example,
In case of Exynos SoC, a bridge device such as mDNIe and MIC could be placed between Display Controller and MIPI DSI device but the bridge device is required optionally.

Thanks,
Inki Dae

> 
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@...sung.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_dsi.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index a11b795..6ee0dac 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1651,8 +1651,6 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
>  		return ret;
>  
>  	dsi->bridge_node = of_graph_get_remote_node(node, DSI_PORT_IN, 0);
> -	if (!dsi->bridge_node)
> -		return -EINVAL;
>  
>  	return 0;
>  }
>