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imx-drm: imx-drm-core: skip components whose parent device is disabled

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In a board setup which disables LDB device node completely by changing
status to 'disabled', and only enables HDMI device, we're running into
the problem that imx-drm master never succeeds in binding, and hence
HDMI does not come up either.

&ldb {
	status = "disabled";

	lvds-channel@1 {
		...
		status = "okay";
	};
};

The imx-drm-core should really skip the LVDS channels no matter what
lvds-channel's status is, if LDB device is disabled.  Let's consider
such setup a misconfiguration, give a warning in there and not add the
component.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Shawn Guo 2014-04-14 10:02:26 +08:00 committed by Russell King
parent c509bdc20d
commit 1c2366298b
1 changed files with 5 additions and 0 deletions
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5
drivers/staging/imx-drm/imx-drm-core.c
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@ -675,6 +675,11 @@ static int imx_drm_platform_probe(struct platform_device *pdev)
if (!remote || !of_device_is_available(remote)) {
of_node_put(remote);
continue;
} else if (!of_device_is_available(remote->parent)) {
dev_warn(&pdev->dev, "parent device of %s is not available\n",
remote->full_name);
of_node_put(remote);
continue;
}
ret = imx_drm_add_component(&pdev->dev, remote);