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Message-Id: <1461584066-6205-1-git-send-email-ykk@rock-chips.com>
Date: Mon, 25 Apr 2016 19:34:26 +0800
From: Yakir Yang <ykk@...k-chips.com>
To: David Airlie <airlied@...ux.ie>,
Thierry Reding <treding@...dia.com>,
Jingoo Han <jingoohan1@...il.com>,
Mark Yao <yzq@...k-chips.com>,
Heiko Stuebner <heiko@...ech.de>,
Rob Herring <robh+dt@...nel.org>
Cc: Inki Dae <inki.dae@...sung.com>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
emil.l.velikov@...il.com, Dan Carpenter <dan.carpenter@...cle.com>,
Yakir Yang <ykk@...k-chips.com>, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-samsung-soc@...r.kernel.org,
linux-rockchip@...ts.infradead.org
Subject: [PATCH v1 5/8] drm/rockchip: analogix_dp: make panel detect to an optional action
Some boards don't need to declare a panel device node, like the
display interface is DP monitors, so it's necessary to make the
panel detect to an optional action.
Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 48 ++++++++++++-------------
1 file changed, 22 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index f559b5c..adb38b2 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -319,38 +319,34 @@ static int rockchip_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *panel_node, *port, *endpoint;
+ struct drm_panel *panel = NULL;
struct rockchip_dp_device *dp;
- struct drm_panel *panel;
port = of_graph_get_port_by_id(dev->of_node, 1);
- if (!port) {
- dev_err(dev, "can't find output port\n");
- return -EINVAL;
- }
-
- endpoint = of_get_child_by_name(port, "endpoint");
- of_node_put(port);
- if (!endpoint) {
- dev_err(dev, "no output endpoint found\n");
- return -EINVAL;
- }
-
- panel_node = of_graph_get_remote_port_parent(endpoint);
- of_node_put(endpoint);
- if (!panel_node) {
- dev_err(dev, "no output node found\n");
- return -EINVAL;
- }
-
- panel = of_drm_find_panel(panel_node);
- if (!panel) {
- DRM_ERROR("failed to find panel\n");
+ if (port) {
+ endpoint = of_get_child_by_name(port, "endpoint");
+ of_node_put(port);
+ if (!endpoint) {
+ dev_err(dev, "no output endpoint found\n");
+ return -EINVAL;
+ }
+
+ panel_node = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+ if (!panel_node) {
+ dev_err(dev, "no output node found\n");
+ return -EINVAL;
+ }
+
+ panel = of_drm_find_panel(panel_node);
+ if (!panel) {
+ DRM_ERROR("failed to find panel\n");
+ of_node_put(panel_node);
+ return -EPROBE_DEFER;
+ }
of_node_put(panel_node);
- return -EPROBE_DEFER;
}
- of_node_put(panel_node);
-
dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
if (!dp)
return -ENOMEM;
--
1.9.1
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