drm driver may probe before the i2c bus, so the driver should defer probing until it is available
Signed-off-by: Andy Yan andy.yan@rock-chips.com Reviewed-by: Daniel Kurtz djkurtz@chromium.org
---
Changes in v14: None Changes in v13: None Changes in v12: - refactor of_node_put(ddc_node)
Changes in v11: None Changes in v10: None Changes in v9: None Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: - defer probe ddc i2c adapter
Changes in v3: None
drivers/gpu/drm/imx/imx-hdmi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/imx/imx-hdmi.c b/drivers/gpu/drm/imx/imx-hdmi.c index 79daec4..8029a07 100644 --- a/drivers/gpu/drm/imx/imx-hdmi.c +++ b/drivers/gpu/drm/imx/imx-hdmi.c @@ -1611,10 +1611,12 @@ 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) + of_node_put(ddc_node); + if (!hdmi->ddc) { dev_dbg(hdmi->dev, "failed to read ddc node\n"); + return -EPROBE_DEFER; + }
- of_node_put(ddc_node); } else { dev_dbg(hdmi->dev, "no ddc property found\n"); }