drm driver may probe before the i2c bus, so the driver should
defer probing untill it is avaliable
Signed-off-by: Andy Yan <andy.yan at rock-chips.com>
---
drivers/gpu/drm/bridge/dw_hdmi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index df52921..e9e73a7 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1503,8 +1503,11 @@ static int dw_hdmi_bind(struct device *dev, struct device *master, void *data)
ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
if (ddc_node) {
hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
- if (!hdmi->ddc)
+ if (!hdmi->ddc) {
dev_dbg(hdmi->dev, "failed to read ddc node\n");
+ of_node_put(ddc_node);
+ return -EPROBE_DEFER;
+ }
of_node_put(ddc_node);
} else {
--
1.9.1
