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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
This commit is contained in:
Boris Brezillon 2018-05-09 15:00:40 +02:00 committed by Thierry Reding
parent 5fa8e4a221
commit c59eb3cfde
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/drm_panel.c
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@ -152,13 +152,18 @@ EXPORT_SYMBOL(drm_panel_detach);
*
* Return: A pointer to the panel registered for the specified device tree
* node or an ERR_PTR() if no panel matching the device tree node can be found.
* The only error that can be reported is -EPROBE_DEFER, meaning that the panel
* device has not been probed yet, and the caller should retry later.
* Possible error codes returned by this function:
* - EPROBE_DEFER: the panel device has not been probed yet, and the caller
* should retry later
* - ENODEV: the device is not available (status != "okay" or "ok")
*/
struct drm_panel *of_drm_find_panel(const struct device_node *np)
{
struct drm_panel *panel;
if (!of_device_is_available(np))
return ERR_PTR(-ENODEV);
mutex_lock(&panel_lock);
list_for_each_entry(panel, &panel_list, list) {