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@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 {