linux-kernel - [PATCH AUTOSEL for 4.9 172/281] drm/sun4i: Ignore the generic connectors for components

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Message-ID: <20180319155742.13731-172-alexander.levin@microsoft.com>
Date:   Mon, 19 Mar 2018 16:01:17 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.9 172/281] drm/sun4i: Ignore the generic
 connectors for components

From: Maxime Ripard <maxime.ripard@...e-electrons.com>

[ Upstream commit 49baeb074783f5bdf770dc9fac5fbb2837190583 ]

The generic connectors such as hdmi-connector doesn't have any driver in,
so if they are added to the component list, we will be waiting forever for
a non-existing driver to probe.

Add a list of the connectors we want to ignore when building our component
list.

Reviewed-by: Chen-Yu Tsai <wens@...e.org>
Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 1feec34ca9dd..7a3d8e8eed75 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -206,6 +206,11 @@ static const struct component_master_ops sun4i_drv_master_ops = {
 	.unbind	= sun4i_drv_unbind,
 };
 
+static bool sun4i_drv_node_is_connector(struct device_node *node)
+{
+	return of_device_is_compatible(node, "hdmi-connector");
+}
+
 static bool sun4i_drv_node_is_frontend(struct device_node *node)
 {
 	return of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
@@ -246,6 +251,13 @@ static int sun4i_drv_add_endpoints(struct device *dev,
 	    !of_device_is_available(node))
 		return 0;
 
+	/*
+	 * The connectors will be the last nodes in our pipeline, we
+	 * can just bail out.
+	 */
+	if (sun4i_drv_node_is_connector(node))
+		return 0;
+
 	if (!sun4i_drv_node_is_frontend(node)) {
 		/* Add current component */
 		DRM_DEBUG_DRIVER("Adding component %s\n",
-- 
2.14.1