drm_panel framework allows only query for presence of given panel.
It also does not protect panel module from unloading and does not
provide solution for driver unbinding. interface_tracker
should solve both issues.
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
---
---
drivers/gpu/drm/drm_panel.c | 5 +++++
include/linux/interface_tracker.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
index 2ef988e..72a3c5c 100644
--- a/drivers/gpu/drm/drm_panel.c
+++ b/drivers/gpu/drm/drm_panel.c
@@ -22,6 +22,7 @@
*/
#include <linux/err.h>
+#include <linux/interface_tracker.h>
#include <linux/module.h>
#include <drm/drm_crtc.h>
@@ -41,6 +42,8 @@ int drm_panel_add(struct drm_panel *panel)
mutex_lock(&panel_lock);
list_add_tail(&panel->list, &panel_list);
mutex_unlock(&panel_lock);
+ interface_tracker_ifup(panel->dev->of_node,
+ INTERFACE_TRACKER_TYPE_DRM_PANEL, panel);
return 0;
}
@@ -48,6 +51,8 @@ EXPORT_SYMBOL(drm_panel_add);
void drm_panel_remove(struct drm_panel *panel)
{
+ interface_tracker_ifdown(panel->dev->of_node,
+ INTERFACE_TRACKER_TYPE_DRM_PANEL, panel);
mutex_lock(&panel_lock);
list_del_init(&panel->list);
mutex_unlock(&panel_lock);
diff --git a/include/linux/interface_tracker.h b/include/linux/interface_tracker.h
index e1eff00..0a08cba 100644
--- a/include/linux/interface_tracker.h
+++ b/include/linux/interface_tracker.h
@@ -6,6 +6,8 @@
struct list_head;
struct interface_tracker_block;
+#define INTERFACE_TRACKER_TYPE_DRM_PANEL 1
+
typedef void (*interface_tracker_fn_t)(struct interface_tracker_block *itb,
const void *object, unsigned long type,
bool on, void *data);
--
1.8.3.2
--
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