drm/panel: Let of_drm_find_panel() return -ENODEV when the panel is disabled
DT nodes might be present in the DT but with a status property set to "disabled" or "fail". In this case, we should not return -EPROBE_DEFER when the caller asks for a drm_panel instance. Return -ENODEV instead. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Thierry Reding <treding@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180509130042.9435-3-boris.brezillon@bootlin.com
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@ -152,13 +152,18 @@ EXPORT_SYMBOL(drm_panel_detach);
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*
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* Return: A pointer to the panel registered for the specified device tree
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* node or an ERR_PTR() if no panel matching the device tree node can be found.
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* The only error that can be reported is -EPROBE_DEFER, meaning that the panel
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* device has not been probed yet, and the caller should retry later.
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* Possible error codes returned by this function:
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* - EPROBE_DEFER: the panel device has not been probed yet, and the caller
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* should retry later
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* - ENODEV: the device is not available (status != "okay" or "ok")
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*/
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struct drm_panel *of_drm_find_panel(const struct device_node *np)
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{
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struct drm_panel *panel;
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if (!of_device_is_available(np))
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return ERR_PTR(-ENODEV);
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mutex_lock(&panel_lock);
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list_for_each_entry(panel, &panel_list, list) {
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