[PATCH] drm: Add support to find drm_panel by name

[Shobhit Kumar]

For scenarios where OF is not available, we can use panel identification by
name.

v2: Use const char *name instead of name[NAME_MAX] (Thierry)

CC: Thierry Reding <thierry.reding at gmail.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/drm_panel.c | 18 ++++++++++++++++++
 include/drm/drm_panel.h     |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
index 2ef988e..7b4f559 100644
--- a/drivers/gpu/drm/drm_panel.c
+++ b/drivers/gpu/drm/drm_panel.c
@@ -95,6 +95,24 @@ struct drm_panel *of_drm_find_panel(struct device_node *np)
 EXPORT_SYMBOL(of_drm_find_panel);
 #endif

+struct drm_panel *drm_find_panel_by_name(const char *name)
+{
+       struct drm_panel *panel;
+
+       mutex_lock(&panel_lock);
+
+       list_for_each_entry(panel, &panel_list, list) {
+               if (panel->name && strcmp(panel->name, name) == 0) {
+                       mutex_unlock(&panel_lock);
+                       return panel;
+               }
+       }
+
+       mutex_unlock(&panel_lock);
+       return NULL;
+}
+EXPORT_SYMBOL(drm_find_panel_by_name);
+
 MODULE_AUTHOR("Thierry Reding <treding at nvidia.com>");
 MODULE_DESCRIPTION("DRM panel infrastructure");
 MODULE_LICENSE("GPL and additional rights");
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
index 1fbcc96..43b9004 100644
--- a/include/drm/drm_panel.h
+++ b/include/drm/drm_panel.h
@@ -74,6 +74,7 @@ struct drm_panel {
        struct drm_device *drm;
        struct drm_connector *connector;
        struct device *dev;
+       const char *name;

        const struct drm_panel_funcs *funcs;

@@ -137,4 +138,6 @@ static inline struct drm_panel *of_drm_find_panel(struct 
device_node *np)
 }
 #endif

+struct drm_panel *drm_find_panel_by_name(const char *name);
+
 #endif
-- 
1.9.1