diff options
Diffstat (limited to 'drivers/gpu/drm/drm_panel.c')
| -rw-r--r-- | drivers/gpu/drm/drm_panel.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 19ab0a794add..c627e42a7ce7 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -24,6 +24,7 @@ #include <linux/backlight.h> #include <linux/err.h> #include <linux/module.h> +#include <linux/of.h> #include <drm/drm_crtc.h> #include <drm/drm_panel.h> @@ -49,7 +50,7 @@ static LIST_HEAD(panel_list); * @dev: parent device of the panel * @funcs: panel operations * @connector_type: the connector type (DRM_MODE_CONNECTOR_*) corresponding to - * the panel interface + * the panel interface (must NOT be DRM_MODE_CONNECTOR_Unknown) * * Initialize the panel structure for subsequent registration with * drm_panel_add(). @@ -57,6 +58,9 @@ static LIST_HEAD(panel_list); void drm_panel_init(struct drm_panel *panel, struct device *dev, const struct drm_panel_funcs *funcs, int connector_type) { + if (connector_type == DRM_MODE_CONNECTOR_Unknown) + DRM_WARN("%s: %s: a valid connector type is required!\n", __func__, dev_name(dev)); + INIT_LIST_HEAD(&panel->list); INIT_LIST_HEAD(&panel->followers); mutex_init(&panel->follower_lock); @@ -413,7 +417,7 @@ bool drm_is_panel_follower(struct device *dev) * don't bother trying to parse it here. We just need to know if the * property is there. */ - return of_property_read_bool(dev->of_node, "panel"); + return of_property_present(dev->of_node, "panel"); } EXPORT_SYMBOL(drm_is_panel_follower); |