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[RFC,5/5] drm/msm: mdp4 lvds: Check the panel node in detect_panel()

Message ID 1439567497-13855-1-git-send-email-srinivas.kandagatla@linaro.org
State New
Headers show

Commit Message

Srinivas Kandagatla Aug. 14, 2015, 3:51 p.m. UTC 
This patch checks if the panel node is disabled in DT or not, this would
let us return proper error code so that the driver could stop panel
specific intialization.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
index ad02b8b..167f402 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
@@ -262,6 +262,11 @@  static struct drm_panel *detect_panel(struct drm_device *dev)
 
 	of_node_put(endpoint);
 
+	if (!of_device_is_available(panel_node)) {
+		dev_err(dev->dev, "panel is not enabled in DT\n");
+		return ERR_PTR(-ENODEV);
+	}
+
 	panel = of_drm_find_panel(panel_node);
 	if (!panel) {
 		of_node_put(panel_node);