drm driver may probe before the i2c bus, so the driver should
defer probing until it is available
Signed-off-by: Andy Yan <andy....@rock-chips.com>
---
Changes in v6: None
Changes in v5: None
Changes in v4:
- defer probe ddc i2c adapter
Changes in v3: None
Changes in v2: None
drivers/staging/imx-drm/imx-hdmi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/imx-drm/imx-hdmi.c
b/drivers/staging/imx-drm/imx-hdmi.c
index 79daec4..c2b035a 100644
--- a/drivers/staging/imx-drm/imx-hdmi.c
+++ b/drivers/staging/imx-drm/imx-hdmi.c
@@ -1611,8 +1611,11 @@ static int imx_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
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