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From: Sui Jingfeng <sui.jingfeng@linux.dev>
To: Liu Ying <victor.liu@nxp.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>,
	Maxime Ripard <mripard@kernel.org>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org,
	Sui Jingfeng <sui.jingfeng@linux.dev>
Subject: [PATCH] drm/bridge: imx: Remove redundant checks on existence of bridge->encoder
Date: Sat, 11 May 2024 23:08:16 +0800
Message-ID: <20240511150816.326846-1-sui.jingfeng@linux.dev>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

The check on the existence of bridge->encoder on the implementation layer
of drm bridge driver is not necessary, as it has already been done in the
drm_bridge_attach() function. It is guaranteed that the .encoder member
of the drm_bridge instance is not NULL when various imx_xxx_bridge_attach()
function gets called.

Remove the redundant checking codes "if (!bridge->encoder) { ... }".

Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
---
 drivers/gpu/drm/bridge/imx/imx-ldb-helper.c         | 5 -----
 drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c | 5 -----
 drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c     | 5 -----
 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c        | 5 -----
 4 files changed, 20 deletions(-)

diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
index 6967325cd8ee..9b5bebbe357d 100644
--- a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
@@ -116,11 +116,6 @@ int ldb_bridge_attach_helper(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
-	if (!bridge->encoder) {
-		DRM_DEV_ERROR(ldb->dev, "missing encoder\n");
-		return -ENODEV;
-	}
-
 	return drm_bridge_attach(bridge->encoder,
 				ldb_ch->next_bridge, bridge,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
index d0868a6ac6c9..e6dbbdc87ce2 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
@@ -119,11 +119,6 @@ static int imx8qxp_pc_bridge_attach(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
-	if (!bridge->encoder) {
-		DRM_DEV_ERROR(pc->dev, "missing encoder\n");
-		return -ENODEV;
-	}
-
 	return drm_bridge_attach(bridge->encoder,
 				 ch->next_bridge, bridge,
 				 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
index ed8b7a4e0e11..1d11cc1df43c 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
@@ -138,11 +138,6 @@ static int imx8qxp_pixel_link_bridge_attach(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
-	if (!bridge->encoder) {
-		DRM_DEV_ERROR(pl->dev, "missing encoder\n");
-		return -ENODEV;
-	}
-
 	return drm_bridge_attach(bridge->encoder,
 				 pl->next_bridge, bridge,
 				 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
index 4a886cb808ca..fb7cf4369bb8 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
@@ -58,11 +58,6 @@ static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
-	if (!bridge->encoder) {
-		DRM_DEV_ERROR(p2d->dev, "missing encoder\n");
-		return -ENODEV;
-	}
-
 	return drm_bridge_attach(bridge->encoder,
 				 p2d->next_bridge, bridge,
 				 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-- 
2.43.0