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drm/sun4i: defer only if we didn't find our panel

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Our code currently defers our probe on any error, even if we were not
expecting to have one at all.

Make sure we return -EPROBE_DEFER only when we were supposed to have a
panel, but it's not probed yet.

Also fix a typo while we're at it.

Fixes: 29e57fab97 ("drm: sun4i: Add RGB output")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Maxime Ripard 2016-05-04 17:38:32 +02:00
parent bb43d40d7c
commit 0bbbb00bda
1 changed files with 9 additions and 8 deletions
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17
drivers/gpu/drm/sun4i/sun4i_tcon.c
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@ -425,11 +425,11 @@ static struct drm_panel *sun4i_tcon_find_panel(struct device_node *node)
remote = of_graph_get_remote_port_parent(end_node);
if (!remote) {
DRM_DEBUG_DRIVER("Enable to parse remote node\n");
DRM_DEBUG_DRIVER("Unable to parse remote node\n");
return ERR_PTR(-EINVAL);
}
return of_drm_find_panel(remote);
return of_drm_find_panel(remote) ?: ERR_PTR(-EPROBE_DEFER);
}
static int sun4i_tcon_bind(struct device *dev, struct device *master,
@ -522,12 +522,13 @@ static int sun4i_tcon_probe(struct platform_device *pdev)
* Defer the probe.
*/
panel = sun4i_tcon_find_panel(node);
if (IS_ERR(panel)) {
/*
* If we don't have a panel endpoint, just go on
*/
if (PTR_ERR(panel) != -ENODEV)
return -EPROBE_DEFER;
/*
* If we don't have a panel endpoint, just go on
*/
if (PTR_ERR(panel) == -EPROBE_DEFER) {
DRM_DEBUG_DRIVER("Still waiting for our panel. Deferring...\n");
return -EPROBE_DEFER;
}
return component_add(&pdev->dev, &sun4i_tcon_ops);