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[RFC,10/16] drm/armada: fix compare_of() for LCD controllers

Message ID 20181218153742.1313125-11-lkundrak@v3.sk (mailing list archive)
State New, archived
Headers show
Series Armada DRM support for OLPC XO-1.75 laptop | expand

Commit Message

Lubomir Rintel Dec. 18, 2018, 3:37 p.m. UTC 
From: Russell King <rmk+kernel@armlinux.org.uk>

The DT node passed for LCD controllers is the "port" node within the
parent device.  Detect this and compare the parent node.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

---
 drivers/gpu/drm/armada/armada_drv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index fa31589b4fc0..9f2eb02df295 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -181,7 +181,10 @@  static void armada_drm_unbind(struct device *dev)
 
 static int compare_of(struct device *dev, void *data)
 {
-	return dev->of_node == data;
+	struct device_node *np = data;
+	if (of_node_cmp(np->name, "port") == 0)
+		np = np->parent;
+	return dev->of_node == np;
 }
 
 static int compare_dev_name(struct device *dev, void *data)