support drm_user_handler to handle vendor events

Change-Id: I23149a08d9f9f66f9929d95dcfe6a96c1c897404

2 files changed, 78 insertions, 0 deletions

diff --git a/xf86drm.h b/xf86drm.h
index 0d927018..fa170e39 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -752,6 +752,13 @@ typedef struct _drmEventContext {
 
 extern int drmHandleEvent(int fd, drmEventContextPtr evctx);
 
+#define TIZEN_USE_USER_HANDLER
+#ifdef TIZEN_USE_USER_HANDLER
+typedef int (*drm_user_handler)(struct drm_event *event);
+extern int drmAddUserHandler(int fd, drm_user_handler handler);
+extern void drmRemoveUserHandler(int fd, drm_user_handler handler);
+#endif
+
 extern char *drmGetDeviceNameFromFd(int fd);
 
 /* Improved version of drmGetDeviceNameFromFd which attributes for any type of
diff --git a/xf86drmMode.c b/xf86drmMode.c
index 0266bc10..82daa43b 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -883,6 +883,63 @@ int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
 	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETGAMMA, &l);
 }
 
+#ifdef TIZEN_USE_USER_HANDLER
+#include "libdrm_lists.h"
+#include <stdlib.h>
+
+struct drm_user_handler_data {
+	int fd;
+	drm_user_handler handler;
+	drmMMListHead link;
+};
+
+static drmMMListHead user_handler_list;
+static int user_handler_list_init = 0;
+
+int
+drmAddUserHandler(int fd, drm_user_handler handler)
+{
+	struct drm_user_handler_data *data = malloc(sizeof(struct drm_user_handler_data));
+
+	if (!data)
+		return -1;
+
+	data->fd = fd;
+	data->handler = handler;
+
+	if (!user_handler_list_init)
+	{
+		user_handler_list_init = 1;
+		DRMINITLISTHEAD(&user_handler_list);
+	}
+
+	DRMLISTADDTAIL(&data->link, &user_handler_list);
+
+	return 0;
+}
+
+void
+drmRemoveUserHandler(int fd, drm_user_handler handler)
+{
+	struct drm_user_handler_data *data;
+
+	if (!user_handler_list_init)
+	{
+		user_handler_list_init = 1;
+		DRMINITLISTHEAD(&user_handler_list);
+	}
+
+	DRMLISTFOREACHENTRY(data, &user_handler_list, link) {
+		if (data->fd == fd && data->handler == handler)
+		{
+			DRMLISTDEL(&data->link);
+			free(data);
+			return;
+		}
+	}
+}
+#endif
+
 int drmHandleEvent(int fd, drmEventContextPtr evctx)
 {
 	char buffer[1024];
@@ -926,6 +983,20 @@ int drmHandleEvent(int fd, drmEventContextPtr evctx)
 						 U642VOID (vblank->user_data));
 			break;
 		default:
+#ifdef TIZEN_USE_USER_HANDLER
+			{
+				struct drm_user_handler_data *data;
+				int ret = -1;
+				DRMLISTFOREACHENTRY(data, &user_handler_list, link) {
+					if (data->fd == fd && data->handler)
+					{
+						ret = data->handler(e);
+						if (ret == 0)
+							break;
+					}
+				}
+			}
+#endif
 			break;
 		}
 		i += e->length;