Commit 9528e541 authored by Jani Nikula's avatar Jani Nikula
Browse files

drm/panel: abstract of_panel_find() 



Add a helper to wrap OF-specific calls in drm_panel_add_follower() in
preparation for adding an ACPI equivalent in the future. No functional
changes.

Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250522100036.2529624-1-jani.nikula@intel.com


Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 370f86bc

drivers/gpu/drm/drm_panel.c

+16 −7
Original line number Diff line number Diff line
@@ -473,6 +473,21 @@ int of_drm_get_panel_orientation(const struct device_node *np, 
EXPORT_SYMBOL(of_drm_get_panel_orientation);

#endif



static struct drm_panel *of_find_panel(struct device *follower_dev)

{

	struct device_node *panel_np;

	struct drm_panel *panel;



	panel_np = of_parse_phandle(follower_dev->of_node, "panel", 0);

	if (!panel_np)

		return ERR_PTR(-ENODEV);



	panel = of_drm_find_panel(panel_np);

	of_node_put(panel_np);



	return panel;

}



/**

 * drm_is_panel_follower() - Check if the device is a panel follower

 * @dev: The 'struct device' to check
@@ -518,16 +533,10 @@ EXPORT_SYMBOL(drm_is_panel_follower); 
int drm_panel_add_follower(struct device *follower_dev,

			   struct drm_panel_follower *follower)

{

	struct device_node *panel_np;

	struct drm_panel *panel;

	int ret;



	panel_np = of_parse_phandle(follower_dev->of_node, "panel", 0);

	if (!panel_np)

		return -ENODEV;



	panel = of_drm_find_panel(panel_np);

	of_node_put(panel_np);

	panel = of_find_panel(follower_dev);

	if (IS_ERR(panel))

		return PTR_ERR(panel);