Commit c2c38488 authored Dec 05, 2014 by Andy Yan Committed by Philipp Zabel Jan 06, 2015

drm: imx: imx-hdmi: return defer if can't get ddc i2c adapter



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>
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

parent b5878339

drivers/gpu/drm/imx/imx-hdmi.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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");
		}