linux-kernel - [PATCH v4] drm/exynos/dsi: Remove error handling for bridge

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Date:   Wed, 21 Jun 2017 19:51:43 +0900
From:   Hoegeun Kwon <hoegeun.kwon@...sung.com>
To:     inki.dae@...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,
        tjakobi@...h.uni-bielefeld.de, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hoegeun Kwon <hoegeun.kwon@...sung.com>
Subject: [PATCH v4] drm/exynos/dsi: Remove error handling for bridge_node DT
 parsing

Remove the error handling of bridge_node because the bridge_node is
optional.

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 optional.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@...sung.com>
---

Hi all,

Thanks for Krzysztof's advice.

Changes for V4:
- Fixed the word('optional') from commit message.

Changes for V3:
- Removed the word('required') from commit message.

Changes for V2:
- Modified the commit message in more detail than before.

Best regards,
Hoegeun

 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;
 }
-- 
1.9.1