tdm_output: execute mutex unlock before call direct commit handler
[platform/core/uifw/libtdm.git] / src / tdm_output.c
index 9e97abe..285887e 100644 (file)
@@ -9,7 +9,7 @@
  *          Taeheon Kim <th908.kim@samsung.com>,
  *          YoungJun Cho <yj44.cho@samsung.com>,
  *          SooChan Lim <sc1.lim@samsung.com>,
- *          Boram Park <sc1.lim@samsung.com>
+ *          Boram Park <boram1288.park@samsung.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
 #include "config.h"
 #endif
 
-#include "tdm.h"
-#include "tdm_backend.h"
 #include "tdm_private.h"
-#include "tdm_helper.h"
 
 #define COUNT_MAX   10
 
@@ -48,7 +45,7 @@
        tdm_private_display *private_display; \
        tdm_private_output *private_output; \
        tdm_error ret = TDM_ERROR_NONE; /* default TDM_ERROR_NONE */\
-       TDM_RETURN_VAL_IF_FAIL(tdm_output_is_valid(output), TDM_ERROR_INVALID_PARAMETER); \
+       TDM_RETURN_VAL_IF_FAIL(output != NULL, TDM_ERROR_INVALID_PARAMETER); \
        private_output = (tdm_private_output*)output; \
        private_display = private_output->private_display
 
        tdm_private_display *private_display; \
        tdm_private_output *private_output; \
        tdm_error ret = TDM_ERROR_NONE; /* default TDM_ERROR_NONE */\
-       TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(tdm_output_is_valid(output), TDM_ERROR_INVALID_PARAMETER, NULL); \
+       TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(output != NULL, TDM_ERROR_INVALID_PARAMETER, NULL); \
        private_output = (tdm_private_output*)output; \
        private_display = private_output->private_display
 
+static void
+_tdm_output_vblank_timeout_update(tdm_private_output *private_output, int ms_delay);
 
-static tdm_private_hwc_window *
-_tdm_output_find_private_hwc_window(tdm_private_output *private_output,
-                                                               tdm_hwc_window *hwc_window_backend)
+static tdm_error
+_tdm_output_vblank_timeout_cb(void *user_data)
 {
-       tdm_private_hwc_window *private_hwc_window = NULL;
+       tdm_private_output *private_output = user_data;
+       tdm_private_output_vblank_handler *v = NULL;
+
+       TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_OPERATION_FAILED);
 
-       LIST_FOR_EACH_ENTRY(private_hwc_window, &private_output->hwc_window_list, link) {
-               if (private_hwc_window->hwc_window_backend == hwc_window_backend)
-                       return private_hwc_window;
+       private_output->vblank_timeout_timer_expired++;
+
+       TDM_ERR("TDM output(%d) vblank TIMEOUT!! (%d time%s)",
+                       private_output->pipe,
+                       private_output->vblank_timeout_timer_expired,
+                       (private_output->vblank_timeout_timer_expired > 1) ? "s" : "");
+
+       LIST_FOR_EACH_ENTRY(v, &private_output->vblank_handler_list, link) {
+               TDM_ERR("vblank_handler(%p) interval(%d) sync(%d) sent_to_frontend(%u) owner_tid(%d)",
+                               v, v->interval, v->sync, v->sent_to_frontend, v->owner_tid);
        }
 
-       return NULL;
+       return TDM_ERROR_NONE;
+}
+
+INTERN void
+tdm_output_vblank_print_wait_information(tdm_private_output *private_output, void *user_data)
+{
+       tdm_private_output_vblank_handler *v = NULL;
+
+       TDM_RETURN_IF_FAIL(private_output != NULL);
+       TDM_RETURN_IF_FAIL(user_data != NULL);
+
+       TDM_ERR("TDM output(%d) vblank user_data(%p) info!!", private_output->pipe, user_data);
+
+       LIST_FOR_EACH_ENTRY(v, &private_output->vblank_handler_list, link) {
+               if (v->user_data != user_data)
+                       continue;
+               TDM_ERR("vblank_handler(%p) interval(%d) sync(%d) sent_to_frontend(%u) owner_tid(%d)",
+                               v, v->interval, v->sync, v->sent_to_frontend, v->owner_tid);
+       }
+}
+
+static void
+_tdm_output_vblank_timeout_update(tdm_private_output *private_output, int ms_delay)
+{
+       tdm_error ret;
+
+       if (!private_output->vblank_timeout_timer) {
+               private_output->vblank_timeout_timer =
+                       tdm_event_loop_add_timer_handler(private_output->private_display,
+                                                                                        _tdm_output_vblank_timeout_cb,
+                                                                                        private_output,
+                                                                                        &ret);
+               if (!private_output->vblank_timeout_timer) {
+                       TDM_ERR("output(%d) couldn't add timer", private_output->pipe);
+                       return;
+               }
+               TDM_INFO("output(%d) create vblank timeout timer", private_output->pipe);
+               private_output->vblank_timeout_timer_expired = 0;
+       }
+
+       ret = tdm_event_loop_source_timer_update(private_output->vblank_timeout_timer, ms_delay);
+       if (ret != TDM_ERROR_NONE) {
+               TDM_ERR("output(%d) couldn't update timer", private_output->pipe);
+               return;
+       }
+}
+
+INTERN tdm_error
+tdm_output_init(tdm_private_display *private_display)
+{
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_OUTPUT_DESTROY, tdm_display_find_output_stamp);
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_OUTPUT_COMMIT, tdm_display_find_output_stamp);
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_OUTPUT_VBLANK, tdm_display_find_output_stamp);
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_OUTPUT_STATUS, tdm_display_find_output_stamp);
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_OUTPUT_DPMS, tdm_display_find_output_stamp);
+       tdm_thread_cb_set_find_func(TDM_THREAD_CB_VOUTPUT_COMMIT, tdm_display_find_private_voutput);
+
+       return TDM_ERROR_NONE;
+}
+
+INTERN tdm_error
+tdm_output_call_thread_cb_destroy(tdm_private_output *private_output)
+{
+       tdm_thread_cb_output_destroy output_destroy;
+       tdm_error ret;
+
+       memset(&output_destroy, 0, sizeof output_destroy);
+       output_destroy.base.type = TDM_THREAD_CB_OUTPUT_DESTROY;
+       output_destroy.base.length = sizeof output_destroy;
+       output_destroy.base.object_stamp = private_output->stamp;
+       output_destroy.base.data = NULL;
+       output_destroy.base.sync = 1;
+
+       ret = tdm_thread_cb_call(private_output, &output_destroy.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+
+       return TDM_ERROR_NONE;
+}
+
+INTERN void
+tdm_output_thread_cb_destroy(tdm_private_display *private_display, void *object, tdm_thread_cb_base *cb_base, void *user_data)
+{
+       tdm_private_output *private_output = object;
+       tdm_private_output_destroy_handler *destroy_handler = user_data;
+
+       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
+
+       assert(destroy_handler->owner_tid == syscall(SYS_gettid));
+
+       _pthread_mutex_unlock(&private_display->lock);
+       destroy_handler->func(private_output, destroy_handler->user_data);
+       _pthread_mutex_lock(&private_display->lock);
+}
+
+EXTERN tdm_error
+tdm_output_add_destroy_handler(tdm_output *output,
+                                                          tdm_output_destroy_handler func,
+                                                          void *user_data)
+{
+       tdm_private_output_destroy_handler *destroy_handler = NULL;
+       OUTPUT_FUNC_ENTRY();
+
+       TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       LIST_FOR_EACH_ENTRY(destroy_handler, &private_output->destroy_handler_list, link) {
+               if (destroy_handler->func == func && destroy_handler->user_data == user_data) {
+                       TDM_ERR("can't add twice");
+                       _pthread_mutex_unlock(&private_display->lock);
+                       return TDM_ERROR_BAD_REQUEST;
+               }
+       }
+
+       destroy_handler = calloc(1, sizeof(tdm_private_output_destroy_handler));
+       if (!destroy_handler) {
+               TDM_ERR("failed: alloc memory");
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OUT_OF_MEMORY;
+       }
+
+       ret = tdm_thread_cb_add(private_output, TDM_THREAD_CB_OUTPUT_DESTROY, NULL, tdm_output_thread_cb_destroy, destroy_handler);
+       if (ret != TDM_ERROR_NONE) {
+               TDM_ERR("tdm_thread_cb_add failed");
+               free(destroy_handler);
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OPERATION_FAILED;
+       }
+
+       destroy_handler->private_output = private_output;
+       destroy_handler->func = func;
+       destroy_handler->user_data = user_data;
+       destroy_handler->owner_tid = syscall(SYS_gettid);
+
+       LIST_ADDTAIL(&destroy_handler->link, &private_output->destroy_handler_list);
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
+}
+
+EXTERN void
+tdm_output_remove_destroy_handler(tdm_output *output,
+                                                                 tdm_output_destroy_handler func,
+                                                                 void *user_data)
+{
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_output_destroy_handler *destroy_handler = NULL, *hh = NULL;
+
+       TDM_RETURN_IF_FAIL(output != NULL);
+       TDM_RETURN_IF_FAIL(func != NULL);
+
+       private_output = (tdm_private_output*)output;
+       private_display = private_output->private_display;
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       LIST_FOR_EACH_ENTRY_SAFE(destroy_handler, hh, &private_output->destroy_handler_list, link) {
+               if (destroy_handler->func != func || destroy_handler->user_data != user_data)
+                       continue;
+
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_DESTROY, NULL, tdm_output_thread_cb_destroy, destroy_handler);
+
+               LIST_DEL(&destroy_handler->link);
+               free(destroy_handler);
+
+               _pthread_mutex_unlock(&private_display->lock);
+
+               return;
+       }
+
+       _pthread_mutex_unlock(&private_display->lock);
+}
+
+EXTERN tdm_module *
+tdm_output_get_backend_module(tdm_output *output, tdm_error *error)
+{
+       tdm_private_module *private_module;
+
+       OUTPUT_FUNC_ENTRY_ERROR();
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       private_module = private_output->private_module;
+
+       if (error)
+               *error = TDM_ERROR_NONE;
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return private_module;
 }
 
 EXTERN tdm_error
@@ -127,87 +326,140 @@ tdm_output_get_conn_status(tdm_output *output, tdm_output_conn_status *status)
        return ret;
 }
 
-/* LCOV_EXCL_START */
-static void
-_tdm_output_update(tdm_output *output_backend, void *user_data)
+INTERN void
+tdm_output_thread_cb_change(tdm_private_display *private_display, void *object, tdm_thread_cb_base *cb_base, void *user_data)
 {
-       tdm_private_display *private_display;
-       tdm_private_output *private_output = user_data;
-       tdm_error ret;
+       tdm_private_output *private_output = object;
+       tdm_private_output_change_handler *change_handler = user_data;
+       tdm_output_change_type type = TDM_OUTPUT_CHANGE_CONNECTION;
+       tdm_value value = {.u32 = 0 };
 
-       TDM_RETURN_IF_FAIL(private_output);
+       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 
-       private_display = private_output->private_display;
+       assert(change_handler->owner_tid == syscall(SYS_gettid));
+
+       if (cb_base->type == TDM_THREAD_CB_OUTPUT_STATUS) {
+               tdm_thread_cb_output_status *output_status = (tdm_thread_cb_output_status *)cb_base;
+               type = TDM_OUTPUT_CHANGE_CONNECTION;
+               value.u32 = output_status->status;
+       } else if (cb_base->type == TDM_THREAD_CB_OUTPUT_DPMS) {
+               tdm_thread_cb_output_dpms *output_dpms = (tdm_thread_cb_output_dpms *)cb_base;
+               type = TDM_OUTPUT_CHANGE_DPMS;
+               value.u32 = output_dpms->dpms;
+       } else {
+               TDM_NEVER_GET_HERE();
+               return;
+       }
+
+       _pthread_mutex_unlock(&private_display->lock);
+       change_handler->func(private_output, type, value, change_handler->user_data);
+       _pthread_mutex_lock(&private_display->lock);
 
-       ret = tdm_display_update_output(private_display, output_backend, private_output->pipe);
-       TDM_RETURN_IF_FAIL(ret == TDM_ERROR_NONE);
 }
 
-INTERN void
-tdm_output_cb_status(tdm_output *output_backend, tdm_output_conn_status status,
-                                        void *user_data)
+static tdm_error
+_tdm_output_call_thread_cb_status(tdm_private_output *private_output, tdm_output_conn_status status)
 {
-       tdm_private_display *private_display;
-       tdm_private_output *private_output = user_data;
-       tdm_value value;
+       tdm_thread_cb_output_status output_status;
+       pid_t caller_tid = syscall(SYS_gettid);
+       tdm_error ret;
 
-       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
-       TDM_RETURN_IF_FAIL(private_output);
+       memset(&output_status, 0, sizeof output_status);
+       output_status.base.type = TDM_THREAD_CB_OUTPUT_STATUS;
+       output_status.base.length = sizeof output_status;
+       output_status.base.object_stamp = private_output->stamp;
+       output_status.base.data = NULL;
+       if (tdm_thread_in_display_thread(caller_tid))
+               output_status.base.sync = 0;
+       else
+               output_status.base.sync = 1;
+       output_status.status = status;
 
-       private_display = private_output->private_display;
+       ret = tdm_thread_cb_call(private_output, &output_status.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 
-       if (!tdm_thread_in_display_thread(syscall(SYS_gettid))) {
-               tdm_thread_cb_output_status output_status;
-               tdm_error ret;
+       return TDM_ERROR_NONE;
+}
 
-               TDM_INFO("output(%d) %s", private_output->pipe, tdm_status_str(status));
+static tdm_error
+_tdm_output_call_thread_cb_dpms(tdm_private_output *private_output, tdm_output_dpms dpms)
+{
+       tdm_thread_cb_output_dpms output_dpms;
+       tdm_error ret;
 
-               _tdm_output_update(output_backend, user_data);
+       memset(&output_dpms, 0, sizeof output_dpms);
+       output_dpms.base.type = TDM_THREAD_CB_OUTPUT_DPMS;
+       output_dpms.base.length = sizeof output_dpms;
+       output_dpms.base.object_stamp = private_output->stamp;
+       output_dpms.base.data = NULL;
+       output_dpms.base.sync = 0;
+       output_dpms.dpms = dpms;
 
-               output_status.base.type = TDM_THREAD_CB_OUTPUT_STATUS;
-               output_status.base.length = sizeof output_status;
-               output_status.output_stamp = private_output->stamp;
-               output_status.status = status;
-               output_status.user_data = user_data;
+       ret = tdm_thread_cb_call(private_output, &output_dpms.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 
-               value.u32 = status;
-               tdm_output_call_change_handler_internal(private_output,
-                                                                                               &private_output->change_handler_list_sub,
-                                                                                               TDM_OUTPUT_CHANGE_CONNECTION,
-                                                                                               value, 0);
+       return TDM_ERROR_NONE;
+}
 
-               ret = tdm_thread_send_cb(private_display->private_loop, &output_status.base);
-               TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+INTERN void
+tdm_output_cb_status(tdm_output *output_backend, tdm_output_conn_status status, void *user_data)
+{
+       tdm_private_output *private_output = user_data;
+       tdm_error ret;
 
-               return;
-       }
+       TDM_RETURN_IF_FAIL(private_output);
 
        TDM_INFO("output(%d) %s", private_output->pipe, tdm_status_str(status));
 
-       if (!tdm_thread_is_running())
-               _tdm_output_update(output_backend, user_data);
+       if ((private_output->caps.status == TDM_OUTPUT_CONN_STATUS_DISCONNECTED && status != TDM_OUTPUT_CONN_STATUS_DISCONNECTED) ||
+               (private_output->caps.status != TDM_OUTPUT_CONN_STATUS_DISCONNECTED && status == TDM_OUTPUT_CONN_STATUS_DISCONNECTED)) {
+               ret = tdm_display_update_output(private_output->private_module, output_backend);
+               TDM_RETURN_IF_FAIL(ret == TDM_ERROR_NONE);
+       } else {
+               private_output->caps.status = status;
+       }
 
-       value.u32 = status;
-       tdm_output_call_change_handler_internal(private_output,
-                                                                                       &private_output->change_handler_list_main,
-                                                                                       TDM_OUTPUT_CHANGE_CONNECTION,
-                                                                                       value, 0);
+       ret = _tdm_output_call_thread_cb_status(private_output, status);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+}
+
+INTERN void
+tdm_output_cb_dpms(tdm_output *output_backend, tdm_output_dpms dpms, void *user_data)
+{
+       tdm_private_output *private_output = user_data;
+       tdm_error ret;
+
+       TDM_INFO("output(%d) %s", private_output->pipe, tdm_dpms_str(dpms));
+
+       private_output->current_dpms_value = dpms;
+       private_output->waiting_dpms_change = 0;
+       TDM_INFO("output(%d) dpms async '%s' done", private_output->pipe, tdm_dpms_str(dpms));
+
+       ret = _tdm_output_call_thread_cb_dpms(private_output, dpms);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
 }
-/* LCOV_EXCL_STOP */
 
 EXTERN tdm_error
 tdm_output_add_change_handler(tdm_output *output,
                                                          tdm_output_change_handler func,
                                                          void *user_data)
 {
-       tdm_private_change_handler *change_handler;
+       tdm_private_output_change_handler *change_handler = NULL;
        OUTPUT_FUNC_ENTRY();
 
        TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       pthread_mutex_lock(&private_display->lock);
+       _pthread_mutex_lock(&private_display->lock);
+
+       LIST_FOR_EACH_ENTRY(change_handler, &private_output->change_handler_list, link) {
+               if (change_handler->func == func && change_handler->user_data == user_data) {
+                       TDM_ERR("can't add twice");
+                       _pthread_mutex_unlock(&private_display->lock);
+                       return TDM_ERROR_BAD_REQUEST;
+               }
+       }
 
-       change_handler = calloc(1, sizeof(tdm_private_change_handler));
+       change_handler = calloc(1, sizeof(tdm_private_output_change_handler));
        if (!change_handler) {
                /* LCOV_EXCL_START */
                TDM_ERR("failed: alloc memory");
@@ -216,56 +468,144 @@ tdm_output_add_change_handler(tdm_output *output,
                /* LCOV_EXCL_STOP */
        }
 
+       ret = tdm_thread_cb_add(private_output, TDM_THREAD_CB_OUTPUT_DPMS, NULL, tdm_output_thread_cb_change, change_handler);
+       if (ret != TDM_ERROR_NONE) {
+               /* LCOV_EXCL_START */
+               TDM_ERR("tdm_thread_cb_add failed");
+               free(change_handler);
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OPERATION_FAILED;
+               /* LCOV_EXCL_STOP */
+       }
+
+       ret = tdm_thread_cb_add(private_output, TDM_THREAD_CB_OUTPUT_STATUS, NULL, tdm_output_thread_cb_change, change_handler);
+       if (ret != TDM_ERROR_NONE) {
+               /* LCOV_EXCL_START */
+               TDM_ERR("tdm_thread_cb_add failed");
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_DPMS, NULL, tdm_output_thread_cb_change, change_handler);
+               free(change_handler);
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OPERATION_FAILED;
+               /* LCOV_EXCL_STOP */
+       }
+
        change_handler->private_output = private_output;
        change_handler->func = func;
        change_handler->user_data = user_data;
        change_handler->owner_tid = syscall(SYS_gettid);
 
-       if (!tdm_thread_in_display_thread(change_handler->owner_tid))
-               LIST_ADDTAIL(&change_handler->link, &private_output->change_handler_list_sub);
-       else
-               LIST_ADDTAIL(&change_handler->link, &private_output->change_handler_list_main);
+       LIST_ADDTAIL(&change_handler->link, &private_output->change_handler_list);
 
        _pthread_mutex_unlock(&private_display->lock);
 
        return ret;
 }
 
-EXTERN void
-tdm_output_remove_change_handler(tdm_output *output,
-                                                                tdm_output_change_handler func,
-                                                                void *user_data)
+EXTERN tdm_error
+tdm_output_add_mode_change_request_handler(tdm_output *output,
+                                                                                  tdm_output_mode_change_request_handler func,
+                                                                                  void *user_data)
 {
        tdm_private_display *private_display;
        tdm_private_output *private_output;
-       tdm_private_change_handler *h = NULL, *hh = NULL;
+       tdm_private_output_mode_change_handler *mode_change_handler = NULL;
 
-       TDM_RETURN_IF_FAIL(tdm_output_is_valid(output));
-       TDM_RETURN_IF_FAIL(func != NULL);
+       TDM_RETURN_VAL_IF_FAIL(output != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+       private_output = (tdm_private_output*)output;
+       private_display = private_output->private_display;
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       LIST_FOR_EACH_ENTRY(mode_change_handler, &private_output->mode_change_request_handler_list, link) {
+               if (mode_change_handler->func == func && mode_change_handler->user_data == user_data) {
+                       TDM_ERR("can't add twice");
+                       _pthread_mutex_unlock(&private_display->lock);
+                       return TDM_ERROR_BAD_REQUEST;
+               }
+       }
+
+       mode_change_handler = calloc(1, sizeof(tdm_private_output_mode_change_handler));
+       if (!mode_change_handler) {
+               /* LCOV_EXCL_START */
+               TDM_ERR("failed: alloc memory");
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OUT_OF_MEMORY;
+               /* LCOV_EXCL_STOP */
+       }
+
+       mode_change_handler->private_output = private_output;
+       mode_change_handler->func = func;
+       mode_change_handler->user_data = user_data;
+
+       LIST_ADDTAIL(&mode_change_handler->link, &private_output->mode_change_request_handler_list);
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return TDM_ERROR_NONE;
+}
+
+EXTERN tdm_error
+tdm_output_remove_mode_change_request_handler(tdm_output *output,
+                                                                                         tdm_output_mode_change_request_handler func,
+                                                                                         void *user_data)
+{
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_output_mode_change_handler *mode_change_handler = NULL, *hh = NULL;
+
+       TDM_RETURN_VAL_IF_FAIL(output != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(func != NULL, TDM_ERROR_INVALID_PARAMETER);
 
        private_output = (tdm_private_output*)output;
        private_display = private_output->private_display;
 
        _pthread_mutex_lock(&private_display->lock);
 
-       LIST_FOR_EACH_ENTRY_SAFE(h, hh, &private_output->change_handler_list_main, link) {
-               if (h->func != func || h->user_data != user_data)
+       LIST_FOR_EACH_ENTRY_SAFE(mode_change_handler, hh, &private_output->mode_change_request_handler_list, link) {
+               if (mode_change_handler->func != func || mode_change_handler->user_data != user_data)
                        continue;
 
-               LIST_DEL(&h->link);
-               free(h);
+               LIST_DEL(&mode_change_handler->link);
+               free(mode_change_handler);
 
                _pthread_mutex_unlock(&private_display->lock);
 
-               return;
+               return TDM_ERROR_NONE;
        }
 
-       LIST_FOR_EACH_ENTRY_SAFE(h, hh, &private_output->change_handler_list_sub, link) {
-               if (h->func != func || h->user_data != user_data)
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return TDM_ERROR_INVALID_PARAMETER;
+}
+
+EXTERN void
+tdm_output_remove_change_handler(tdm_output *output,
+                                                                tdm_output_change_handler func,
+                                                                void *user_data)
+{
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_output_change_handler *change_handler = NULL, *hh = NULL;
+
+       TDM_RETURN_IF_FAIL(output != NULL);
+       TDM_RETURN_IF_FAIL(func != NULL);
+
+       private_output = (tdm_private_output*)output;
+       private_display = private_output->private_display;
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       LIST_FOR_EACH_ENTRY_SAFE(change_handler, hh, &private_output->change_handler_list, link) {
+               if (change_handler->func != func || change_handler->user_data != user_data)
                        continue;
 
-               LIST_DEL(&h->link);
-               free(h);
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_DPMS, NULL, tdm_output_thread_cb_change, change_handler);
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_STATUS, NULL, tdm_output_thread_cb_change, change_handler);
+
+               LIST_DEL(&change_handler->link);
+               free(change_handler);
 
                _pthread_mutex_unlock(&private_display->lock);
 
@@ -311,7 +651,7 @@ tdm_output_get_layer_count(tdm_output *output, int *count)
 
        *count = 0;
        LIST_FOR_EACH_ENTRY(private_layer, &private_output->layer_list, link)
-       (*count)++;
+               (*count)++;
        if (*count == 0) {
                _pthread_mutex_unlock(&private_display->lock);
                return TDM_ERROR_NONE;
@@ -425,22 +765,9 @@ tdm_output_get_cursor_available_size(tdm_output *output, int *min_w, int *min_h,
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!tdm_display_check_module_abi(private_display, 1, 5)) {
-
-               if (min_w)
-                       *min_w = -1;
-               if (min_h)
-                       *min_h = -1;
-               if (max_w)
-                       *max_w = -1;
-               if (max_h)
-                       *max_h = -1;
-               if (preferred_align)
-                       *preferred_align = -1;
-
+       if (!tdm_module_check_abi(private_output->private_module, 1, 5)) {
                _pthread_mutex_unlock(&private_display->lock);
-
-               return TDM_ERROR_BAD_MODULE;
+               return TDM_ERROR_BAD_REQUEST;
        }
 
        if (min_w)
@@ -532,17 +859,19 @@ tdm_output_get_primary_index(tdm_output *output, int *index)
 EXTERN tdm_error
 tdm_output_set_property(tdm_output *output, unsigned int id, tdm_value value)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        OUTPUT_FUNC_ENTRY();
 
        _pthread_mutex_lock(&private_display->lock);
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
        if (!func_output->output_set_property) {
                /* LCOV_EXCL_START */
                _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
+               TDM_WRN("not implemented!!");
                return TDM_ERROR_NOT_IMPLEMENTED;
                /* LCOV_EXCL_STOP */
        }
@@ -558,6 +887,7 @@ tdm_output_set_property(tdm_output *output, unsigned int id, tdm_value value)
 EXTERN tdm_error
 tdm_output_get_property(tdm_output *output, unsigned int id, tdm_value *value)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        OUTPUT_FUNC_ENTRY();
 
@@ -565,12 +895,13 @@ tdm_output_get_property(tdm_output *output, unsigned int id, tdm_value *value)
 
        _pthread_mutex_lock(&private_display->lock);
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
        if (!func_output->output_get_property) {
                /* LCOV_EXCL_START */
                _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
+               TDM_WRN("not implemented!!");
                return TDM_ERROR_NOT_IMPLEMENTED;
                /* LCOV_EXCL_STOP */
        }
@@ -583,44 +914,26 @@ tdm_output_get_property(tdm_output *output, unsigned int id, tdm_value *value)
        return ret;
 }
 
-INTERN void
-tdm_output_cb_vblank(tdm_output *output_backend, unsigned int sequence,
-                                        unsigned int tv_sec, unsigned int tv_usec, void *user_data)
+static void
+_tdm_output_thread_cb_vblank(tdm_private_display *private_display, void *object, tdm_thread_cb_base *cb_base, void *user_data)
 {
-       tdm_private_vblank_handler *vblank_handler = user_data;
-       tdm_private_vblank_handler *v = NULL, *vv = NULL;
-       tdm_private_output *private_output;
-       tdm_private_display *private_display;
+       tdm_thread_cb_output_vblank *output_vblank = (tdm_thread_cb_output_vblank *)cb_base;
+       tdm_private_output_vblank_handler *vblank_handler = output_vblank->base.data;
+       tdm_private_output_vblank_handler *v = NULL, *vv = NULL;
+       tdm_private_output *private_output = object;
        struct list_head clone_list;
        int interval, sync;
        pid_t tid = syscall(SYS_gettid);
 
        TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
-       TDM_RETURN_IF_FAIL(vblank_handler);
-
-       private_output = vblank_handler->private_output;
-       private_display = private_output->private_display;
 
-       if (vblank_handler->owner_tid != tid) {
-               tdm_thread_cb_output_vblank output_vblank;
-               tdm_error ret;
+       assert(vblank_handler->owner_tid == tid);
 
-               output_vblank.base.type = TDM_THREAD_CB_OUTPUT_VBLANK;
-               output_vblank.base.length = sizeof output_vblank;
-               output_vblank.output_stamp = vblank_handler->private_output->stamp;
-               output_vblank.sequence = sequence;
-               output_vblank.tv_sec = tv_sec;
-               output_vblank.tv_usec = tv_usec;
-               output_vblank.user_data = user_data;
+       vblank_handler->sent_to_frontend = 0;
 
-               ret = tdm_thread_send_cb(private_display->private_loop, &output_vblank.base);
-               TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+       _tdm_output_vblank_timeout_update(private_output, 0);
 
-               return;
-       }
-
-       if (vblank_handler->owner_tid != tid)
-               TDM_NEVER_GET_HERE();
+       tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_VBLANK, vblank_handler, _tdm_output_thread_cb_vblank, NULL);
 
        interval = vblank_handler->interval;
        sync = vblank_handler->sync;
@@ -646,7 +959,11 @@ tdm_output_cb_vblank(tdm_output *output_backend, unsigned int sequence,
                LIST_DEL(&v->link);
 
                if (v->func)
-                       v->func(v->private_output, sequence, tv_sec, tv_usec, v->user_data);
+                       v->func(v->private_output,
+                                       output_vblank->sequence,
+                                       output_vblank->tv_sec,
+                                       output_vblank->tv_usec,
+                                       v->user_data);
 
                free(v);
        }
@@ -656,40 +973,49 @@ tdm_output_cb_vblank(tdm_output *output_backend, unsigned int sequence,
                TDM_INFO("-----------------------------------------...");
 }
 
-INTERN void
-tdm_output_cb_commit(tdm_output *output_backend, unsigned int sequence,
-                                        unsigned int tv_sec, unsigned int tv_usec, void *user_data)
+static void
+_tdm_output_cb_vblank(tdm_output *output_backend, unsigned int sequence,
+                                         unsigned int tv_sec, unsigned int tv_usec, void *user_data)
 {
-       tdm_private_output_commit_handler *output_commit_handler = user_data;
-       tdm_private_display *private_display;
-       tdm_private_output *private_output;
-       tdm_private_layer *private_layer = NULL;
+       tdm_private_output_vblank_handler *vblank_handler = user_data;
+       tdm_thread_cb_output_vblank output_vblank;
+       tdm_error ret;
 
-       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
+       memset(&output_vblank, 0, sizeof output_vblank);
+       output_vblank.base.type = TDM_THREAD_CB_OUTPUT_VBLANK;
+       output_vblank.base.length = sizeof output_vblank;
+       output_vblank.base.object_stamp = vblank_handler->private_output->stamp;
+       output_vblank.base.data = vblank_handler;
+       output_vblank.base.sync = 0;
+       output_vblank.sequence = sequence;
+       output_vblank.tv_sec = tv_sec;
+       output_vblank.tv_usec = tv_usec;
 
-       if (!output_commit_handler)
-               return;
+       vblank_handler->sent_to_frontend = 1;
 
-       private_output = output_commit_handler->private_output;
-       private_display = private_output->private_display;
+       if (tdm_debug_module & TDM_DEBUG_COMMIT)
+               TDM_INFO("output(%d) wait_vblank: handler(%p)", vblank_handler->private_output->pipe, vblank_handler);
 
-       if (output_commit_handler->owner_tid != syscall(SYS_gettid)) {
-               tdm_thread_cb_output_commit output_commit;
-               tdm_error ret;
+       ret = tdm_thread_cb_call(vblank_handler->private_output, &output_vblank.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+}
 
-               output_commit.base.type = TDM_THREAD_CB_OUTPUT_COMMIT;
-               output_commit.base.length = sizeof output_commit;
-               output_commit.output_stamp = private_output->stamp;
-               output_commit.sequence = sequence;
-               output_commit.tv_sec = tv_sec;
-               output_commit.tv_usec = tv_usec;
-               output_commit.user_data = user_data;
+static void
+_tdm_output_thread_cb_commit(tdm_private_display *private_display, void *object, tdm_thread_cb_base *cb_base, void *user_data)
+{
+       tdm_thread_cb_output_commit *output_commit = (tdm_thread_cb_output_commit *)cb_base;
+       tdm_private_output_commit_handler *output_commit_handler = output_commit->base.data;
+       tdm_private_output *private_output = object;
+       tdm_private_layer *private_layer = NULL;
 
-               ret = tdm_thread_send_cb(private_display->private_loop, &output_commit.base);
-               TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
 
+       if (!output_commit_handler)
                return;
-       }
+
+       assert(output_commit_handler->owner_tid == syscall(SYS_gettid));
+
+       tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_COMMIT, output_commit_handler, _tdm_output_thread_cb_commit, NULL);
 
        LIST_DEL(&output_commit_handler->link);
 
@@ -708,8 +1034,11 @@ tdm_output_cb_commit(tdm_output *output_backend, unsigned int sequence,
 
        if (output_commit_handler->func) {
                _pthread_mutex_unlock(&private_display->lock);
-               output_commit_handler->func(private_output, sequence,
-                                                                       tv_sec, tv_usec, output_commit_handler->user_data);
+               output_commit_handler->func(private_output,
+                                                                       output_commit->sequence,
+                                                                       output_commit->tv_sec,
+                                                                       output_commit->tv_usec,
+                                                                       output_commit_handler->user_data);
                _pthread_mutex_lock(&private_display->lock);
        }
 
@@ -719,23 +1048,133 @@ tdm_output_cb_commit(tdm_output *output_backend, unsigned int sequence,
                TDM_INFO("-----------------------------------------...");
 }
 
+static void
+_tdm_output_cb_commit(tdm_output *output_backend, unsigned int sequence,
+                                         unsigned int tv_sec, unsigned int tv_usec, void *user_data)
+{
+       tdm_private_output_commit_handler *output_commit_handler = user_data;
+       tdm_private_output *private_output;
+       tdm_thread_cb_output_commit output_commit;
+       tdm_error ret;
+
+       if (output_commit_handler)
+               private_output = output_commit_handler->private_output;
+       else
+               private_output = tdm_display_find_private_output(tdm_display_get(), output_backend);
+
+       memset(&output_commit, 0, sizeof output_commit);
+       output_commit.base.type = TDM_THREAD_CB_OUTPUT_COMMIT;
+       output_commit.base.length = sizeof output_commit;
+       output_commit.base.object_stamp = private_output->stamp;
+       output_commit.base.data = output_commit_handler;
+       output_commit.base.sync = 0;
+       output_commit.sequence = sequence;
+       output_commit.tv_sec = tv_sec;
+       output_commit.tv_usec = tv_usec;
+
+       ret = tdm_thread_cb_call(private_output, &output_commit.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+}
+
+static void
+_tdm_voutput_thread_cb_commit(tdm_private_display *private_display, void *object, tdm_thread_cb_base *cb_base, void *user_data)
+{
+       tdm_thread_cb_voutput_commit *voutput_commit = (tdm_thread_cb_voutput_commit *)cb_base;
+       tdm_private_voutput_commit_handler *voutput_commit_handler = voutput_commit->base.data;
+       tdm_private_voutput *private_voutput = object;
+       tdm_private_output *private_output = NULL;
+
+       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
+
+       if (!voutput_commit_handler)
+               return;
+
+       assert(voutput_commit_handler->owner_tid == syscall(SYS_gettid));
+
+       tdm_thread_cb_remove(private_voutput, TDM_THREAD_CB_VOUTPUT_COMMIT, voutput_commit_handler, _tdm_voutput_thread_cb_commit, NULL);
+
+       LIST_DEL(&voutput_commit_handler->link);
+
+       private_output = private_voutput->private_output;
+       if (tdm_debug_module & TDM_DEBUG_COMMIT) {
+               TDM_INFO("----------------------------------------- voutput(%d) committed", private_output->pipe);
+               TDM_INFO("handler(%p)", voutput_commit_handler);
+       }
+
+       if (voutput_commit_handler->func && private_voutput->set_voutput_commit != 0) {
+               _pthread_mutex_unlock(&private_display->lock);
+               voutput_commit_handler->func(private_voutput, voutput_commit_handler->user_data);
+               _pthread_mutex_lock(&private_display->lock);
+       }
+
+       free(voutput_commit_handler);
+
+       if (tdm_debug_module & TDM_DEBUG_COMMIT)
+               TDM_INFO("-----------------------------------------...");
+}
+
+static void
+_tdm_voutput_cb_commit(tdm_voutput *voutput_backend, unsigned int sequence,
+                                         unsigned int tv_sec, unsigned int tv_usec, void *user_data)
+{
+       tdm_private_voutput_commit_handler *voutput_commit_handler = NULL;
+       tdm_private_module *private_module;
+       tdm_private_voutput *private_voutput = NULL, *v = NULL;
+       tdm_private_output *private_output;
+       tdm_thread_cb_voutput_commit voutput_commit;
+       tdm_error ret;
+
+       private_module = tdm_display_get()->virtual_module;
+
+       LIST_FOR_EACH_ENTRY(v, &private_module->voutput_list, link) {
+               if (v->voutput_backend == voutput_backend) {
+                       private_voutput = v;
+                       break;
+               }
+       }
+       if (!private_voutput) {
+               TDM_ERR("cannot find voutput");
+               return;
+       }
+
+       if (LIST_LENGTH(&private_voutput->voutput_commit_handler_list) == 0) return;
+
+       voutput_commit_handler = LIST_FIRST_ENTRY(&private_voutput->voutput_commit_handler_list, tdm_private_voutput_commit_handler, link);
+
+       private_output = private_voutput->private_output;
+
+       memset(&voutput_commit, 0, sizeof voutput_commit);
+       voutput_commit.base.type = TDM_THREAD_CB_VOUTPUT_COMMIT;
+       voutput_commit.base.length = sizeof voutput_commit;
+       voutput_commit.base.object_stamp = private_output->stamp;
+       voutput_commit.base.data = voutput_commit_handler;
+       voutput_commit.base.sync = 0;
+       voutput_commit.sequence = sequence;
+       voutput_commit.tv_sec = tv_sec;
+       voutput_commit.tv_usec = tv_usec;
+
+       ret = tdm_thread_cb_call(private_voutput, &voutput_commit.base, 1);
+       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+}
+
 /* add_front: To distinguish between the user vblank handlers and the layer
  *            commit vblank handlers. The layer commit handlers will be called
  *            before calling the user vblank handlers.
  */
 static tdm_error
-_tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
+_tdm_output_wait_vblank(tdm_private_output *private_output, int interval, int sync,
                                                tdm_output_vblank_handler func, void *user_data,
                                                unsigned int add_front)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
-       tdm_private_vblank_handler *vblank_handler = NULL, *v = NULL;
+       tdm_private_output_vblank_handler *vblank_handler = NULL, *v = NULL;
        unsigned int skip_request = 0;
        pid_t tid = syscall(SYS_gettid);
+       tdm_error ret = TDM_ERROR_NONE;
 
-       OUTPUT_FUNC_ENTRY();
-
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
        /* interval SHOULD be at least 1 */
        if (interval <= 0)
@@ -743,7 +1182,7 @@ _tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
 
        if (!func_output->output_wait_vblank) {
                /* LCOV_EXCL_START */
-               TDM_ERR("not implemented!!");
+               TDM_WRN("not implemented!!");
                return TDM_ERROR_NOT_IMPLEMENTED;
                /* LCOV_EXCL_STOP */
        }
@@ -751,10 +1190,10 @@ _tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
        if (!private_output->regist_vblank_cb) {
                private_output->regist_vblank_cb = 1;
                ret = func_output->output_set_vblank_handler(private_output->output_backend,
-                               tdm_output_cb_vblank);
+                               _tdm_output_cb_vblank);
        }
 
-       vblank_handler = calloc(1, sizeof(tdm_private_vblank_handler));
+       vblank_handler = calloc(1, sizeof(tdm_private_output_vblank_handler));
        if (!vblank_handler) {
                /* LCOV_EXCL_START */
                TDM_ERR("failed: alloc memory");
@@ -786,10 +1225,18 @@ _tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
 
        /* If there is the previous request, we can skip to call output_wait_vblank() */
        if (!skip_request) {
+               ret = tdm_thread_cb_add(private_output, TDM_THREAD_CB_OUTPUT_VBLANK, vblank_handler, _tdm_output_thread_cb_vblank, NULL);
+               if (ret != TDM_ERROR_NONE) {
+                       TDM_ERR("tdm_thread_cb_add failed");
+                       goto wait_failed;
+               }
+
                ret = func_output->output_wait_vblank(private_output->output_backend, interval,
                                                                                          sync, vblank_handler);
                TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, wait_failed);
 
+               _tdm_output_vblank_timeout_update(private_output, 1000);
+
                if (tdm_debug_module & TDM_DEBUG_COMMIT)
                        TDM_INFO("output(%d) backend wait_vblank", private_output->pipe);
        }
@@ -799,6 +1246,7 @@ _tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
 wait_failed:
        /* LCOV_EXCL_START */
        if (vblank_handler) {
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_VBLANK, vblank_handler, _tdm_output_thread_cb_vblank, NULL);
                LIST_DEL(&vblank_handler->link);
                free(vblank_handler);
        }
@@ -811,6 +1259,7 @@ tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
                                           tdm_output_vblank_handler func, void *user_data)
 {
        OUTPUT_FUNC_ENTRY();
+       TDM_RETURN_VAL_IF_FAIL(interval > 0, TDM_ERROR_INVALID_PARAMETER);
 
        _pthread_mutex_lock(&private_display->lock);
 
@@ -821,7 +1270,7 @@ tdm_output_wait_vblank(tdm_output *output, int interval, int sync,
                return TDM_ERROR_DPMS_OFF;
        }
 
-       ret = _tdm_output_wait_vblank(output, interval, sync, func, user_data, 0);
+       ret = _tdm_output_wait_vblank(private_output, interval, sync, func, user_data, 0);
 
        _pthread_mutex_unlock(&private_display->lock);
 
@@ -844,7 +1293,7 @@ tdm_output_wait_vblank_add_front(tdm_output *output, int interval, int sync,
                return TDM_ERROR_DPMS_OFF;
        }
 
-       ret = _tdm_output_wait_vblank(output, interval, sync, func, user_data, 1);
+       ret = _tdm_output_wait_vblank(private_output, interval, sync, func, user_data, 1);
 
        _pthread_mutex_unlock(&private_display->lock);
 
@@ -856,7 +1305,7 @@ INTERN void
 tdm_output_remove_vblank_handler_internal(tdm_output *output, tdm_output_vblank_handler func, void *user_data)
 {
        tdm_private_output *private_output = (tdm_private_output*)output;
-       tdm_private_vblank_handler *v = NULL;
+       tdm_private_output_vblank_handler *v = NULL;
 
        TDM_RETURN_IF_FAIL(private_output != NULL);
        TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
@@ -888,51 +1337,208 @@ tdm_output_remove_commit_handler_internal(tdm_output *output, tdm_output_commit_
                        break;
                }
        }
-}
+}
+
+EXTERN tdm_error
+tdm_output_remove_vblank_handler(tdm_output *output, tdm_output_vblank_handler func, void *user_data)
+{
+       OUTPUT_FUNC_ENTRY();
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       tdm_output_remove_vblank_handler_internal(output, func, user_data);
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
+}
+
+EXTERN tdm_error
+tdm_output_remove_commit_handler(tdm_output *output, tdm_output_commit_handler func, void *user_data)
+{
+       OUTPUT_FUNC_ENTRY();
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       tdm_output_remove_commit_handler_internal(output, func, user_data);
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
+}
+
+INTERN void
+tdm_output_request_mode_set(tdm_output *output, unsigned int index)
+{
+       tdm_private_output *private_output = (tdm_private_output*)output;
+       tdm_private_output_mode_change_handler *mode_change_handler = NULL;
+
+       TDM_RETURN_IF_FAIL(private_output != NULL);
+
+       if (LIST_IS_EMPTY(&private_output->mode_change_request_handler_list))
+               return;
+
+       LIST_FOR_EACH_ENTRY(mode_change_handler, &private_output->mode_change_request_handler_list, link) {
+               mode_change_handler->func(mode_change_handler->private_output, index, mode_change_handler->user_data);
+       }
+}
+
+static void
+_voutput_commit_func(tdm_voutput *voutput, tbm_surface_h buffer)
+{
+       tdm_private_voutput *private_voutput = (tdm_private_voutput *)voutput;
+       tdm_error ret;
+
+       TDM_RETURN_IF_FAIL(voutput != NULL);
+       TDM_RETURN_IF_FAIL(buffer != NULL);
+
+       ret = tdm_voutput_attach_buffer(private_voutput, buffer);
+       TDM_RETURN_IF_FAIL(ret == TDM_ERROR_NONE);
+       ret = tdm_voutput_commit_buffer(private_voutput);
+       TDM_RETURN_IF_FAIL(ret == TDM_ERROR_NONE);
+
+       return;
+}
+
+INTERN tdm_error
+tdm_output_set_voutput_commit(tdm_voutput *voutput)
+{
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_voutput *private_voutput;
+       tdm_private_voutput_commit_handler *voutput_commit_handler = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
+
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+       private_voutput = (tdm_private_voutput *)voutput;
+       private_display = private_voutput->private_display;
+       private_output = (tdm_private_output *)private_voutput->private_output;
+
+       _pthread_mutex_lock(&private_display->lock);
+
+       if (LIST_LENGTH(&private_voutput->voutput_commit_handler_list) != 0) {
+               _pthread_mutex_unlock(&private_display->lock);
+               return ret;
+       }
+
+       if (!private_voutput->regist_commit_cb) {
+               private_voutput->regist_commit_cb = 1;
+               ret = tdm_voutput_set_commit_func(private_voutput, _tdm_voutput_cb_commit);
+               if (ret != TDM_ERROR_NONE) {
+                       TDM_ERR("failed: tdm_voutput_set_commit_func");
+                       _pthread_mutex_unlock(&private_display->lock);
+                       return ret;
+               }
+       }
+
+       voutput_commit_handler = calloc(1, sizeof(tdm_private_voutput_commit_handler));
+       if (!voutput_commit_handler) {
+               /* LCOV_EXCL_START */
+               TDM_ERR("failed: alloc memory");
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_OUT_OF_MEMORY;
+               /* LCOV_EXCL_STOP */
+       }
 
-EXTERN tdm_error
-tdm_output_remove_vblank_handler(tdm_output *output, tdm_output_vblank_handler func, void *user_data)
-{
-       OUTPUT_FUNC_ENTRY();
+       ret = tdm_thread_cb_add(private_output->private_voutput, TDM_THREAD_CB_VOUTPUT_COMMIT, voutput_commit_handler, _tdm_voutput_thread_cb_commit, NULL);
+       if (ret != TDM_ERROR_NONE) {
+               TDM_ERR("tdm_thread_cb_add failed");
+               free(voutput_commit_handler);
+               _pthread_mutex_unlock(&private_display->lock);
+               return ret;
+       }
 
-       _pthread_mutex_lock(&private_display->lock);
+       LIST_ADDTAIL(&voutput_commit_handler->link, &private_voutput->voutput_commit_handler_list);
+       voutput_commit_handler->private_voutput = private_voutput;
+       voutput_commit_handler->func = _voutput_commit_func;
+       voutput_commit_handler->owner_tid = syscall(SYS_gettid);
 
-       tdm_output_remove_vblank_handler_internal(output, func, user_data);
+       private_voutput->set_voutput_commit = 1;
 
        _pthread_mutex_unlock(&private_display->lock);
 
        return ret;
 }
 
-EXTERN tdm_error
-tdm_output_remove_commit_handler(tdm_output *output, tdm_output_commit_handler func, void *user_data)
+INTERN tdm_error
+tdm_output_unset_voutput_commit(tdm_voutput *voutput)
 {
-       OUTPUT_FUNC_ENTRY();
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_voutput *private_voutput;
+       tdm_private_voutput_commit_handler *voutput_commit_handler = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
+
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+       private_voutput = (tdm_private_voutput *)voutput;
+       private_display = private_voutput->private_display;
+       private_output = (tdm_private_output *)private_voutput->private_output;
 
        _pthread_mutex_lock(&private_display->lock);
 
-       tdm_output_remove_commit_handler_internal(output, func, user_data);
+       private_voutput->set_voutput_commit = 0;
+
+       if (private_voutput->regist_commit_cb) {
+               private_voutput->regist_commit_cb = 0;
+               ret = tdm_voutput_set_commit_func(private_voutput, NULL);
+               if (ret != TDM_ERROR_NONE) {
+                       TDM_ERR("failed: tdm_voutput_set_commit_func");
+                       _pthread_mutex_unlock(&private_display->lock);
+                       return ret;
+               }
+       }
+
+       if (LIST_LENGTH(&private_voutput->voutput_commit_handler_list) == 0) {
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_NONE;
+       }
+
+       if (LIST_LENGTH(&private_output->output_commit_handler_list) != 0) {
+               //commiting. don't remove voutput commit thread here
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_NONE;
+       }
+
+       if (LIST_LENGTH(&private_voutput->voutput_commit_handler_list) != 0) {
+               voutput_commit_handler = LIST_FIRST_ENTRY(&private_voutput->voutput_commit_handler_list, tdm_private_voutput_commit_handler, link);
+       } else {
+               _pthread_mutex_unlock(&private_display->lock);
+               return TDM_ERROR_NONE;
+       }
+
+       tdm_thread_cb_remove(private_output->private_voutput, TDM_THREAD_CB_VOUTPUT_COMMIT, voutput_commit_handler, _tdm_voutput_thread_cb_commit, NULL);
 
        _pthread_mutex_unlock(&private_display->lock);
 
-       return ret;
+       return TDM_ERROR_NONE;
 }
 
 INTERN tdm_error
 tdm_output_commit_internal(tdm_output *output, int sync, tdm_output_commit_handler func, void *user_data)
 {
+       tdm_private_display *private_display;
+       tdm_private_output *private_output;
+       tdm_private_voutput *private_voutput;
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        tdm_private_output_commit_handler *output_commit_handler = NULL;
+       tdm_private_voutput_commit_handler *voutput_commit_handler = NULL;
        tdm_private_layer *private_layer = NULL;
        tdm_output_dpms dpms_value = TDM_OUTPUT_DPMS_ON;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       OUTPUT_FUNC_ENTRY();
+       TDM_RETURN_VAL_IF_FAIL(output != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       func_output = &private_display->func_output;
+       private_output = (tdm_private_output*)output;
+       private_module = private_output->private_module;
+       private_display = private_module->private_display;
+       func_output = &private_module->func_output;
 
        if (!func_output->output_commit) {
                /* LCOV_EXCL_START */
-               TDM_ERR("not implemented!!");
+               TDM_WRN("not implemented!!");
                return TDM_ERROR_NOT_IMPLEMENTED;
                /* LCOV_EXCL_STOP */
        }
@@ -941,27 +1547,51 @@ tdm_output_commit_internal(tdm_output *output, int sync, tdm_output_commit_handl
        TDM_RETURN_VAL_IF_FAIL(ret == TDM_ERROR_NONE, ret);
 
        if (!TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms_value)) {
-               if (func) {
-                       if (!private_output->regist_commit_cb) {
-                               private_output->regist_commit_cb = 1;
-                               ret = func_output->output_set_commit_handler(private_output->output_backend,
-                                                       tdm_output_cb_commit);
-                               TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, commit_failed);
-                       }
+               if (!private_output->regist_commit_cb) {
+                       private_output->regist_commit_cb = 1;
+                       ret = func_output->output_set_commit_handler(private_output->output_backend, _tdm_output_cb_commit);
+                       TDM_GOTO_IF_FAIL(ret == TDM_ERROR_NONE, commit_failed);
+               }
+
+               output_commit_handler = calloc(1, sizeof(tdm_private_output_commit_handler));
+               if (!output_commit_handler) {
+                       /* LCOV_EXCL_START */
+                       TDM_ERR("failed: alloc memory");
+                       return TDM_ERROR_OUT_OF_MEMORY;
+                       /* LCOV_EXCL_STOP */
+               }
 
-                       output_commit_handler = calloc(1, sizeof(tdm_private_output_commit_handler));
-                       if (!output_commit_handler) {
-                               /* LCOV_EXCL_START */
-                               TDM_ERR("failed: alloc memory");
-                               return TDM_ERROR_OUT_OF_MEMORY;
-                               /* LCOV_EXCL_STOP */
+               if (private_module == private_display->virtual_module) {
+                       if (!private_output->private_voutput) {
+                               TDM_ERR("virtual module but don't have voutput");
+                               free(output_commit_handler);
+                               return TDM_ERROR_BAD_MODULE;
                        }
+               }
+
+               ret = tdm_thread_cb_add(private_output, TDM_THREAD_CB_OUTPUT_COMMIT, output_commit_handler, _tdm_output_thread_cb_commit, NULL);
+               if (ret != TDM_ERROR_NONE) {
+                       TDM_ERR("tdm_thread_cb_add failed");
+                       free(output_commit_handler);
+                       return ret;
+               }
 
-                       LIST_ADDTAIL(&output_commit_handler->link, &private_output->output_commit_handler_list);
-                       output_commit_handler->private_output = private_output;
-                       output_commit_handler->func = func;
-                       output_commit_handler->user_data = user_data;
-                       output_commit_handler->owner_tid = syscall(SYS_gettid);
+               LIST_ADDTAIL(&output_commit_handler->link, &private_output->output_commit_handler_list);
+               output_commit_handler->private_output = private_output;
+               output_commit_handler->func = func;
+               output_commit_handler->user_data = user_data;
+               output_commit_handler->owner_tid = syscall(SYS_gettid);
+
+               if (private_module == private_display->virtual_module) {
+                       private_voutput = private_output->private_voutput;
+
+                       /* voutput use only 1 layer */
+                       private_layer = LIST_FIRST_ENTRY(&private_output->layer_list, tdm_private_layer, link);
+
+                       if (LIST_LENGTH(&private_voutput->voutput_commit_handler_list) != 0) {
+                               voutput_commit_handler = LIST_FIRST_ENTRY(&private_voutput->voutput_commit_handler_list, tdm_private_voutput_commit_handler, link);
+                               voutput_commit_handler->user_data = private_layer->commiting_buffer;
+                       }
                }
 
                ret = func_output->output_commit(private_output->output_backend, sync,
@@ -980,8 +1610,18 @@ tdm_output_commit_internal(tdm_output *output, int sync, tdm_output_commit_handl
                if (!private_layer->waiting_buffer)
                        continue;
 
+               if (private_layer->committed_buffer) {
+                       tdm_layer_free_buffer(private_layer, private_layer->committed_buffer);
+                       private_layer->committed_buffer = NULL;
+                       if (tdm_debug_module & TDM_DEBUG_BUFFER)
+                               TDM_INFO("layer(%p) waiting_buffer(%p) committed_buffer(%p)",
+                                                private_layer, private_layer->waiting_buffer->buffer,
+                                                private_layer->committed_buffer);
+               }
+
                private_layer->committed_buffer = private_layer->waiting_buffer;
                private_layer->waiting_buffer = NULL;
+               private_layer->commiting_buffer = NULL;
                if (tdm_debug_module & TDM_DEBUG_BUFFER)
                        TDM_INFO("layer(%p) waiting_buffer(%p) committed_buffer(%p)",
                                         private_layer, private_layer->waiting_buffer,
@@ -990,8 +1630,11 @@ tdm_output_commit_internal(tdm_output *output, int sync, tdm_output_commit_handl
 
        if (TDM_OUTPUT_DPMS_VSYNC_IS_OFF(dpms_value)) {
                TDM_WRN("dpms %s. Directly call commit handler instead of commit.", tdm_dpms_str(dpms_value));
-               if (func)
+               if (func) {
+                       _pthread_mutex_unlock(&private_display->lock);
                        func(output, 0, 0, 0, user_data);
+                       _pthread_mutex_lock(&private_display->lock);
+               }
        }
 
        return ret;
@@ -999,9 +1642,11 @@ tdm_output_commit_internal(tdm_output *output, int sync, tdm_output_commit_handl
 commit_failed:
        /* LCOV_EXCL_START */
        if (output_commit_handler) {
+               tdm_thread_cb_remove(private_output, TDM_THREAD_CB_OUTPUT_COMMIT, output_commit_handler, _tdm_output_thread_cb_commit, NULL);
                LIST_DEL(&output_commit_handler->link);
                free(output_commit_handler);
        }
+
        return ret;
        /* LCOV_EXCL_STOP */
 }
@@ -1055,6 +1700,7 @@ tdm_output_commit(tdm_output *output, int sync, tdm_output_commit_handler func,
 EXTERN tdm_error
 tdm_output_set_mode(tdm_output *output, const tdm_output_mode *mode)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        OUTPUT_FUNC_ENTRY();
 
@@ -1062,12 +1708,13 @@ tdm_output_set_mode(tdm_output *output, const tdm_output_mode *mode)
 
        _pthread_mutex_lock(&private_display->lock);
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
        if (!func_output->output_set_mode) {
                /* LCOV_EXCL_START */
                _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
+               TDM_WRN("not implemented!!");
                return TDM_ERROR_NOT_IMPLEMENTED;
                /* LCOV_EXCL_STOP */
        }
@@ -1075,6 +1722,7 @@ tdm_output_set_mode(tdm_output *output, const tdm_output_mode *mode)
        ret = func_output->output_set_mode(private_output->output_backend, mode);
        if (ret == TDM_ERROR_NONE) {
                private_output->current_mode = mode;
+               private_output->need_set_target_info = 1;
                TDM_INFO("mode: %dx%d %dhz", mode->hdisplay, mode->vdisplay, mode->vrefresh);
        }
 
@@ -1099,113 +1747,10 @@ tdm_output_get_mode(tdm_output *output, const tdm_output_mode **mode)
        return ret;
 }
 
-static tdm_error
-_tdm_output_dpms_changed_timeout(void *user_data)
-{
-       tdm_private_output *private_output = user_data;
-       tdm_value value;
-
-       value.u32 = private_output->current_dpms_value;
-       tdm_output_call_change_handler_internal(private_output,
-                                                                                       &private_output->change_handler_list_sub,
-                                                                                       TDM_OUTPUT_CHANGE_DPMS,
-                                                                                       value, 0);
-
-       return TDM_ERROR_NONE;
-}
-
-static tdm_error
-tdm_output_call_dpms_change_handler(tdm_output *output)
-{
-       tdm_private_output *private_output = (tdm_private_output*)output;
-       tdm_value value;
-
-       /** Use timer to call the output change callback of the sub-thread.
-        * The output change callback of tdm_server and tdm_vblank was called
-        * in the main thread. And it made the multi thread issue. If we use
-        * the timer, we can call the sub-thread's output change callback in
-        * sub-thread.
-        */
-       if (!private_output->dpms_changed_timer) {
-               private_output->dpms_changed_timer =
-                       tdm_event_loop_add_timer_handler(private_output->private_display,
-                                                                                        _tdm_output_dpms_changed_timeout, private_output, NULL);
-               if (!private_output->dpms_changed_timer) {
-                       /* LCOV_EXCL_START */
-                       TDM_ERR("can't create dpms timer!!");
-                       return TDM_ERROR_OUT_OF_MEMORY;
-                       /* LCOV_EXCL_STOP */
-               }
-       }
-
-       value.u32 = private_output->current_dpms_value;
-       tdm_output_call_change_handler_internal(private_output,
-                                                                                       &private_output->change_handler_list_main,
-                                                                                       TDM_OUTPUT_CHANGE_DPMS,
-                                                                                       value, 0);
-
-       if (!LIST_IS_EMPTY(&private_output->change_handler_list_sub)) {
-               tdm_error ret = tdm_event_loop_source_timer_update(private_output->dpms_changed_timer, 1);
-               if (ret != TDM_ERROR_NONE)
-                       TDM_NEVER_GET_HERE();
-       }
-
-       return TDM_ERROR_NONE;
-}
-
-/* LCOV_EXCL_START */
-INTERN void
-tdm_output_cb_dpms(tdm_output *output_backend, tdm_output_dpms dpms, void *user_data)
-{
-       tdm_private_display *private_display;
-       tdm_private_output *private_output = user_data;
-       tdm_value value;
-
-       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
-       TDM_RETURN_IF_FAIL(private_output);
-
-       private_display = private_output->private_display;
-
-       if (!tdm_thread_in_display_thread(syscall(SYS_gettid))) {
-               tdm_thread_cb_output_dpms output_dpms;
-               tdm_error ret;
-
-               _tdm_output_update(output_backend, user_data);
-
-               output_dpms.base.type = TDM_THREAD_CB_OUTPUT_DPMS;
-               output_dpms.base.length = sizeof output_dpms;
-               output_dpms.output_stamp = private_output->stamp;
-               output_dpms.dpms = dpms;
-               output_dpms.user_data = user_data;
-
-               value.u32 = dpms;
-               tdm_output_call_change_handler_internal(private_output,
-                                                                                               &private_output->change_handler_list_sub,
-                                                                                               TDM_OUTPUT_CHANGE_DPMS,
-                                                                                               value, 0);
-
-               ret = tdm_thread_send_cb(private_display->private_loop, &output_dpms.base);
-               TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
-
-               return;
-       }
-
-       private_output->current_dpms_value = dpms;
-       private_output->waiting_dpms_change = 0;
-
-       TDM_INFO("output(%d) dpms async '%s' done", private_output->pipe, tdm_dpms_str(dpms));
-
-       value.u32 = dpms;
-       tdm_output_call_change_handler_internal(private_output,
-                                                                                       &private_output->change_handler_list_main,
-                                                                                       TDM_OUTPUT_CHANGE_DPMS,
-                                                                                       value, 0);
-}
-/* LCOV_EXCL_STOP */
-
 EXTERN tdm_error
 tdm_output_set_dpms(tdm_output *output, tdm_output_dpms dpms_value)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        OUTPUT_FUNC_ENTRY();
 
@@ -1230,7 +1775,8 @@ tdm_output_set_dpms(tdm_output *output, tdm_output_dpms dpms_value)
                return TDM_ERROR_BAD_REQUEST;
        }
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
        TDM_INFO("output(%d) dpms '%s'", private_output->pipe, tdm_dpms_str(dpms_value));
 
@@ -1248,9 +1794,9 @@ done:
        if (ret == TDM_ERROR_NONE) {
                if (private_output->current_dpms_value != dpms_value) {
                        private_output->current_dpms_value = dpms_value;
-                       TDM_INFO("output(%d) dpms '%s' done", private_output->pipe, tdm_dpms_str(dpms_value));
-                       tdm_output_call_dpms_change_handler(output);
+                       _tdm_output_call_thread_cb_dpms(private_output, dpms_value);
                }
+               TDM_INFO("output(%d) dpms '%s' done", private_output->pipe, tdm_dpms_str(dpms_value));
        } else {
                tdm_output_dpms temp = TDM_OUTPUT_DPMS_OFF;
 
@@ -1269,6 +1815,7 @@ done:
 EXTERN tdm_error
 tdm_output_set_dpms_async(tdm_output *output, tdm_output_dpms dpms_value)
 {
+       tdm_private_module *private_module;
        tdm_func_output *func_output;
        OUTPUT_FUNC_ENTRY();
 
@@ -1298,15 +1845,16 @@ tdm_output_set_dpms_async(tdm_output *output, tdm_output_dpms dpms_value)
                return TDM_ERROR_BAD_REQUEST;
        }
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
        if (!func_output->output_set_dpms_handler) {
-               TDM_ERR("not implemented: output_set_dpms_handler");
+               TDM_WRN("not implemented: output_set_dpms_handler");
                _pthread_mutex_unlock(&private_display->lock);
                return TDM_ERROR_NOT_IMPLEMENTED;
        }
 
        if (!func_output->output_set_dpms_async) {
-               TDM_ERR("not implemented: output_set_dpms_async");
+               TDM_WRN("not implemented: output_set_dpms_async");
                _pthread_mutex_unlock(&private_display->lock);
                return TDM_ERROR_NOT_IMPLEMENTED;
        }
@@ -1332,220 +1880,81 @@ tdm_output_set_dpms_async(tdm_output *output, tdm_output_dpms dpms_value)
        } else {
                tdm_output_dpms temp = TDM_OUTPUT_DPMS_OFF;
 
-               /* update current_dpms_value forcely */
-               tdm_output_get_dpms_internal(output, &temp);
-
-               TDM_ERR("output(%d) set_dpms_async failed: dpms '%s'", private_output->pipe, tdm_dpms_str(temp));
-       }
-
-       _pthread_mutex_unlock(&private_display->lock);
-
-       return ret;
-}
-/* LCOV_EXCL_STOP */
-
-INTERN tdm_error
-tdm_output_get_dpms_internal(tdm_output *output, tdm_output_dpms *dpms_value)
-{
-       tdm_func_output *func_output;
-       OUTPUT_FUNC_ENTRY();
-
-       TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_INVALID_PARAMETER);
-
-       /* TODO: this is ugly. But before calling backend's output_get_dpms(), we have
-        * to check if all backends's DPMS operation has no problem. In future, we'd
-        * better use new env instead of using commit_per_vblank variable to distinguish
-        * whether we use the stored value or backend's output_get_dpms.
-        */
-       if (!private_output->commit_per_vblank) {
-               *dpms_value = private_output->current_dpms_value;
-               return TDM_ERROR_NONE;
-       }
-
-       func_output = &private_display->func_output;
-
-       if (!func_output->output_get_dpms) {
-               /* LCOV_EXCL_START */
-               *dpms_value = private_output->current_dpms_value;
-               TDM_WRN("not implemented!!");
-               return TDM_ERROR_NONE;
-               /* LCOV_EXCL_STOP */
-       }
-
-       ret = func_output->output_get_dpms(private_output->output_backend, dpms_value);
-       if (ret != TDM_ERROR_NONE) {
-               /* LCOV_EXCL_START */
-               TDM_ERR("output_get_dpms failed");
-               *dpms_value = TDM_OUTPUT_DPMS_OFF;
-               /* LCOV_EXCL_STOP */
-       }
-
-       /* checking with backend's value */
-       if (*dpms_value != private_output->current_dpms_value) {
-               TDM_ERR("output(%d) dpms changed suddenly: %s -> %s",
-                               private_output->pipe, private_output->current_dpms_value,
-                               tdm_dpms_str(*dpms_value));
-               private_output->current_dpms_value = *dpms_value;
-               tdm_output_call_dpms_change_handler(output);
-       }
-
-       return ret;
-}
-
-EXTERN tdm_error
-tdm_output_get_dpms(tdm_output *output, tdm_output_dpms *dpms_value)
-{
-       OUTPUT_FUNC_ENTRY();
-
-       TDM_RETURN_VAL_IF_FAIL(dpms_value != NULL, TDM_ERROR_INVALID_PARAMETER);
-
-       _pthread_mutex_lock(&private_display->lock);
-
-       ret = tdm_output_get_dpms_internal(output, dpms_value);
-
-       _pthread_mutex_unlock(&private_display->lock);
-
-       return ret;
-}
-
-EXTERN tdm_capture *
-tdm_output_create_capture(tdm_output *output, tdm_error *error)
-{
-       tdm_capture *capture = NULL;
-
-       OUTPUT_FUNC_ENTRY_ERROR();
-
-       _pthread_mutex_lock(&private_display->lock);
-
-       capture = (tdm_capture *)tdm_capture_create_output_internal(private_output, error);
-
-       _pthread_mutex_unlock(&private_display->lock);
-
-       return capture;
-}
-
-EXTERN tdm_hwc_window *
-tdm_output_hwc_create_window(tdm_output *output, tdm_error *error)
-{
-       tdm_hwc_window *hwc_window = NULL;
-
-       OUTPUT_FUNC_ENTRY_ERROR();
-
-       _pthread_mutex_lock(&private_display->lock);
-
-       if (private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)
-               hwc_window = (tdm_hwc_window *)tdm_hwc_window_create_internal(private_output, 0, error);
-       else {
-               /* LCOV_EXCL_START */
-               TDM_ERR("output(%p) not support HWC", private_output);
-               if (error)
-                       *error = TDM_ERROR_BAD_REQUEST;
-               /* LCOV_EXCL_STOP */
-       }
-
-       _pthread_mutex_unlock(&private_display->lock);
-
-       return hwc_window;
-}
-
-EXTERN tdm_hwc_window *
-tdm_output_hwc_create_video_window(tdm_output *output, tdm_error *error)
-{
-       tdm_hwc_window *hwc_window = NULL;
-
-       OUTPUT_FUNC_ENTRY_ERROR();
-
-       _pthread_mutex_lock(&private_display->lock);
-
-       if (private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)
-               hwc_window = (tdm_hwc_window *)tdm_hwc_window_create_internal(private_output, 1, error);
-       else {
-               /* LCOV_EXCL_START */
-               TDM_ERR("output(%p) not support HWC", private_output);
-               if (error)
-                       *error = TDM_ERROR_BAD_REQUEST;
-               /* LCOV_EXCL_STOP */
-       }
-
-       _pthread_mutex_unlock(&private_display->lock);
-
-       return hwc_window;
-}
-
-EXTERN tdm_error
-tdm_output_hwc_destroy_window(tdm_output *output, tdm_hwc_window *hwc_window)
-{
-       OUTPUT_FUNC_ENTRY();
-
-       TDM_RETURN_VAL_IF_FAIL(hwc_window != NULL, TDM_ERROR_INVALID_PARAMETER);
-
-       _pthread_mutex_lock(&private_display->lock);
+               /* update current_dpms_value forcely */
+               tdm_output_get_dpms_internal(output, &temp);
 
-       ret = tdm_hwc_window_destroy_internal(hwc_window);
+               TDM_ERR("output(%d) set_dpms_async failed: dpms '%s'", private_output->pipe, tdm_dpms_str(temp));
+       }
 
        _pthread_mutex_unlock(&private_display->lock);
 
        return ret;
 }
+/* LCOV_EXCL_STOP */
 
-EXTERN tdm_error
-tdm_output_hwc_validate(tdm_output *output, uint32_t *num_types)
+INTERN tdm_error
+tdm_output_get_dpms_internal(tdm_output *output, tdm_output_dpms *dpms_value)
 {
-       tdm_func_output *func_output = NULL;
-
-       OUTPUT_FUNC_ENTRY();
+       tdm_private_output *private_output;
+       tdm_private_module *private_module;
+       tdm_func_output *func_output;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       TDM_RETURN_VAL_IF_FAIL(num_types != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(output != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       _pthread_mutex_lock(&private_display->lock);
+       private_output = (tdm_private_output*)output;
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_BAD_REQUEST;
+       /* TODO: this is ugly. But before calling backend's output_get_dpms(), we have
+        * to check if all backends's DPMS operation has no problem. In future, we'd
+        * better use new env instead of using commit_per_vblank variable to distinguish
+        * whether we use the stored value or backend's output_get_dpms.
+        */
+       if (!private_output->commit_per_vblank) {
+               *dpms_value = private_output->current_dpms_value;
+               return TDM_ERROR_NONE;
        }
 
-       func_output = &private_display->func_output;
+       private_module = private_output->private_module;
+       func_output = &private_module->func_output;
 
-       if (!func_output->output_hwc_validate) {
+       if (!func_output->output_get_dpms) {
                /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return TDM_ERROR_NOT_IMPLEMENTED;
+               *dpms_value = private_output->current_dpms_value;
+               TDM_WRN("not implemented!!");
+               return TDM_ERROR_NONE;
                /* LCOV_EXCL_STOP */
        }
 
-       ret = func_output->output_hwc_validate(private_output->output_backend, num_types);
+       ret = func_output->output_get_dpms(private_output->output_backend, dpms_value);
+       if (ret != TDM_ERROR_NONE) {
+               /* LCOV_EXCL_START */
+               TDM_ERR("output_get_dpms failed");
+               *dpms_value = TDM_OUTPUT_DPMS_OFF;
+               /* LCOV_EXCL_STOP */
+       }
 
-       _pthread_mutex_unlock(&private_display->lock);
+       /* checking with backend's value */
+       if (*dpms_value != private_output->current_dpms_value) {
+               TDM_ERR("output(%d) dpms changed suddenly: %s -> %s",
+                               private_output->pipe, tdm_dpms_str(private_output->current_dpms_value),
+                               tdm_dpms_str(*dpms_value));
+               private_output->current_dpms_value = *dpms_value;
+               _tdm_output_call_thread_cb_dpms(private_output, *dpms_value);
+       }
 
        return ret;
 }
 
 EXTERN tdm_error
-tdm_output_hwc_set_need_validate_handler(tdm_output *output,
-               tdm_output_need_validate_handler hndl)
+tdm_output_get_dpms(tdm_output *output, tdm_output_dpms *dpms_value)
 {
        OUTPUT_FUNC_ENTRY();
 
-       TDM_RETURN_VAL_IF_FAIL(hndl != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(dpms_value != NULL, TDM_ERROR_INVALID_PARAMETER);
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_BAD_REQUEST;
-       }
-
-       /* there's no reason to allow this */
-       if (private_output->need_validate.hndl) {
-
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_OPERATION_FAILED;
-       }
-
-       private_output->need_validate.hndl = hndl;
+       ret = tdm_output_get_dpms_internal(output, dpms_value);
 
        _pthread_mutex_unlock(&private_display->lock);
 
@@ -1553,358 +1962,413 @@ tdm_output_hwc_set_need_validate_handler(tdm_output *output,
 }
 
 EXTERN tdm_error
-tdm_output_hwc_get_changed_composition_types(tdm_output *output,
-                                                                                uint32_t *num_elements,
-                                                                                tdm_hwc_window **hwc_window,
-                                                                                tdm_hwc_window_composition *composition_types)
+tdm_output_has_capture_capability(tdm_output *output, unsigned int *has_capability)
 {
-       tdm_func_output *func_output = NULL;
-       tdm_private_hwc_window * private_hwc_window = NULL;
-       int i = 0;
+       tdm_private_module *private_module;
 
        OUTPUT_FUNC_ENTRY();
 
-       TDM_RETURN_VAL_IF_FAIL(num_elements != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(has_capability != NULL, TDM_ERROR_INVALID_PARAMETER);
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_BAD_REQUEST;
-       }
-
-       func_output = &private_display->func_output;
-
-       if (!func_output->output_hwc_get_changed_composition_types) {
-               /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return TDM_ERROR_NOT_IMPLEMENTED;
-               /* LCOV_EXCL_STOP */
-       }
-
-       ret = func_output->output_hwc_get_changed_composition_types(private_output->output_backend,
-                                                       num_elements, hwc_window, composition_types);
-       if (ret != TDM_ERROR_NONE) {
-               /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               return ret;
-               /* LCOV_EXCL_STOP */
-       }
-
-       if (hwc_window == NULL || composition_types == NULL) {
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_NONE;
-       }
-
-       for (i = 0; i < *num_elements; i++) {
-
-               private_hwc_window = _tdm_output_find_private_hwc_window(private_output, hwc_window[i]);
+       private_module = private_output->private_module;
 
-               if (private_hwc_window == NULL) {
-                       /* LCOV_EXCL_START */
-                       TDM_ERR("failed! This should never happen!");
-                       func_output->output_hwc_destroy_window(private_output->output_backend, hwc_window[i]);
-                       *num_elements = 0;
-                       _pthread_mutex_unlock(&private_display->lock);
-                       return TDM_ERROR_OPERATION_FAILED;
-                       /* LCOV_EXCL_STOP */
-               }
-
-               hwc_window[i] = (tdm_hwc_window*)private_hwc_window;
-       }
+       if (!(private_module->capabilities & TDM_DISPLAY_CAPABILITY_CAPTURE))
+               *has_capability = 0;
+       else if (!(private_module->caps_capture.capabilities & TDM_CAPTURE_CAPABILITY_OUTPUT))
+               *has_capability = 0;
+       else
+               *has_capability = 1;
 
        _pthread_mutex_unlock(&private_display->lock);
 
        return ret;
 }
 
-tdm_error
-tdm_output_hwc_accept_changes(tdm_output *output)
+EXTERN tdm_capture *
+tdm_output_create_capture(tdm_output *output, tdm_error *error)
 {
-       tdm_func_output *func_output = NULL;
+       tdm_capture *capture = NULL;
 
-       OUTPUT_FUNC_ENTRY();
+       OUTPUT_FUNC_ENTRY_ERROR();
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
-               _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_BAD_REQUEST;
-       }
-
-       func_output = &private_display->func_output;
-
-       if (!func_output->output_hwc_validate) {
-               /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return TDM_ERROR_NOT_IMPLEMENTED;
-               /* LCOV_EXCL_STOP */
-       }
-
-       ret = func_output->output_hwc_accept_changes(private_output->output_backend);
+       capture = (tdm_capture *)tdm_capture_create_output_internal(private_output, error);
 
        _pthread_mutex_unlock(&private_display->lock);
 
-       return ret;
+       return capture;
 }
 
-tbm_surface_queue_h
-tdm_output_hwc_get_target_buffer_queue(tdm_output *output, tdm_error *error)
+EXTERN tdm_hwc *
+tdm_output_get_hwc(tdm_output *output, tdm_error *error)
 {
-       tdm_func_output *func_output = NULL;
-       tbm_surface_queue_h queue = NULL;
+       tdm_private_hwc *private_hwc = NULL;
 
        OUTPUT_FUNC_ENTRY_ERROR();
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
+       private_hwc = private_output->private_hwc;
+       if (!private_hwc) {
                if (error)
                        *error = TDM_ERROR_BAD_REQUEST;
                _pthread_mutex_unlock(&private_display->lock);
                return NULL;
        }
 
-       func_output = &private_display->func_output;
-
-       if (!func_output->output_hwc_get_target_buffer_queue) {
-               /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return NULL;
-               /* LCOV_EXCL_STOP */
-       }
-
-       queue = func_output->output_hwc_get_target_buffer_queue(private_output->output_backend, error);
+       if (error)
+               *error = TDM_ERROR_NONE;
 
        _pthread_mutex_unlock(&private_display->lock);
 
-       return queue;
+       return private_hwc;
 }
 
-/* LCOV_EXCL_START */
-static void
-_tdm_target_window_dump_buffer(tdm_private_output *private_output, tbm_surface_h buffer)
+INTERN tdm_error
+tdm_output_choose_commit_per_vblank_mode(tdm_private_output *private_output, int mode)
 {
-       unsigned int pipe;
-       char fname[PATH_MAX];
+       if (!private_output)
+               return TDM_ERROR_INVALID_PARAMETER;
 
-       pipe = private_output->pipe;
+       if (mode < 0 || mode > 2)
+               return TDM_ERROR_INVALID_PARAMETER;
 
-       snprintf(fname, sizeof(fname), "tdm_%d_target_win", pipe);
+       private_output->commit_per_vblank = mode;
 
-       tbm_surface_internal_dump_buffer(buffer, fname);
-       TDM_DBG("%s dump excute", fname);
+       if (private_output->commit_per_vblank == 0)
+               TDM_INFO("commit per vblank: disable");
+       else if (private_output->commit_per_vblank == 1)
+               TDM_INFO("commit per vblank: enable (1 layer)");
+       else if (private_output->commit_per_vblank == 2)
+               TDM_INFO("commit per vblank: enable (previous commit)");
 
-       return;
+       return TDM_ERROR_NONE;
 }
-/* LCOV_EXCL_STOP */
 
-EXTERN tdm_error
-tdm_output_hwc_set_client_target_buffer(tdm_output *output, tbm_surface_h target_buffer,
-                                                                       tdm_hwc_region damage)
+INTERN tdm_voutput *
+tdm_voutput_create(tdm_display *dpy, const char *name, tdm_error *error)
 {
-       tdm_func_output *func_output = NULL;
+       tdm_private_module *private_module = NULL;
+       tdm_private_module *current_module = NULL;
+       tdm_private_voutput *private_voutput = NULL;
+       tdm_private_output *private_output = NULL;
+       tdm_func_display *func_display = NULL;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_voutput *voutput_backend = NULL;
+       tdm_output *output_backend = NULL;
+       int output_find = 0;
+       tdm_private_display *private_display;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       OUTPUT_FUNC_ENTRY();
+       TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(dpy != NULL, TDM_ERROR_INVALID_PARAMETER, NULL);
+       private_display = (tdm_private_display*)dpy;
+       private_module = private_display->virtual_module;
+       TDM_RETURN_VAL_IF_FAIL_WITH_ERROR(private_module != NULL, TDM_ERROR_BAD_MODULE, NULL);
 
        _pthread_mutex_lock(&private_display->lock);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
+       if (error) *error = TDM_ERROR_NONE;
+
+       private_voutput = calloc(1, sizeof(tdm_private_voutput));
+       if (!private_voutput) {
+               if (error) *error = TDM_ERROR_OUT_OF_MEMORY;
                _pthread_mutex_unlock(&private_display->lock);
-               return TDM_ERROR_BAD_REQUEST;
+               return NULL;
        }
 
-       if (tdm_debug_dump & TDM_DUMP_FLAG_WINDOW) {
-               /* LCOV_EXCL_START */
-               char str[TDM_PATH_LEN];
-               static int i;
-               snprintf(str, TDM_PATH_LEN, "target_window_%d_%03d",
-                                private_output->index, i++);
-               tdm_helper_dump_buffer_str(target_buffer, tdm_debug_dump_dir, str);
-               /* LCOV_EXCL_STOP */
-       }
+       func_display = &private_module->func_display;
+       func_voutput = &private_module->func_voutput;
+       current_module = private_display->current_module;
+       private_display->current_module = private_module;
 
-       func_output = &private_display->func_output;
+       voutput_backend = func_display->voutput_create(private_module->bdata, name, &ret);
 
-       if (!func_output->output_hwc_set_client_target_buffer) {
-               /* LCOV_EXCL_START */
+       if (voutput_backend == NULL || ret != TDM_ERROR_NONE) {
+               TDM_ERR("voutput_create fail");
+               free(private_voutput);
+               if (error) *error = ret;
+               private_display->current_module = current_module;
                _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return TDM_ERROR_NOT_IMPLEMENTED;
-               /* LCOV_EXCL_STOP */
+               return NULL;
+       }
+       private_voutput->voutput_backend = voutput_backend;
+       private_voutput->private_display = private_display;
+       private_voutput->private_module = private_module;
+       LIST_INITHEAD(&private_voutput->voutput_commit_handler_list);
+
+       output_backend = func_voutput->voutput_get_output(voutput_backend, &ret);
+       if (output_backend == NULL || ret != TDM_ERROR_NONE) {
+               TDM_ERR("voutput_get_output fail");
+               free(private_voutput);
+               if (error) *error = ret;
+               if (func_voutput->voutput_destroy)
+                       func_voutput->voutput_destroy(voutput_backend);
+               else
+                       TDM_ERR("no destroy function");
+               private_display->current_module = current_module;
+               _pthread_mutex_unlock(&private_display->lock);
+               return NULL;
        }
 
-       /* dump buffer */
-       if (tdm_dump_enable)
-       /* LCOV_EXCL_START */
-               _tdm_target_window_dump_buffer((tdm_private_output *)output, target_buffer);
-       /* LCOV_EXCL_STOP */
+       ret = tdm_display_update_output(private_display->current_module, output_backend);
+       if (ret != TDM_ERROR_NONE) {
+               TDM_ERR("tdm_display_update_output fail");
+               free(private_voutput);
+               if (func_voutput->voutput_destroy)
+                       func_voutput->voutput_destroy(voutput_backend);
+               else
+                       TDM_ERR("no destroy function");
+               if (error) *error = ret;
+               private_display->current_module = current_module;
+               _pthread_mutex_unlock(&private_display->lock);
+               return NULL;
+       }
+
+       LIST_FOR_EACH_ENTRY(private_output, &private_module->output_list, link) {
+               if (private_output->output_backend == output_backend) {
+                       output_find = 1;
+                       break;
+               }
+       }
+
+       if (output_find != 1) {
+               private_output = NULL;
+               free(private_voutput);
+               if (func_voutput->voutput_destroy)
+                       func_voutput->voutput_destroy(voutput_backend);
+               else
+                       TDM_ERR("no destroy function");
+               private_voutput = NULL;
+       } else {
+               strncpy(private_voutput->name, name, TDM_NAME_LEN - 1);
+               private_voutput->name[TDM_NAME_LEN - 1] = '\0';
+               strncpy(private_output->name, name, TDM_NAME_LEN - 1);
+               private_output->name[TDM_NAME_LEN - 1] = '\0';
+
+               private_voutput->private_output = private_output;
+               private_output->private_voutput = private_voutput;
+
+               /* do not use vblank */
+               tdm_output_choose_commit_per_vblank_mode(private_output, 0);
+
+               LIST_ADDTAIL(&private_voutput->link, &private_module->voutput_list);
+       }
 
-       ret = func_output->output_hwc_set_client_target_buffer(private_output->output_backend, target_buffer, damage);
+       private_display->current_module = current_module;
 
        _pthread_mutex_unlock(&private_display->lock);
 
-       return ret;
+       return private_voutput;
 }
 
-tdm_error
-tdm_output_hwc_get_video_supported_formats(tdm_output *output, const tbm_format **formats,
-                                                               int *count)
+INTERN tdm_error
+tdm_voutput_destroy(tdm_voutput *voutput)
 {
-       tdm_func_output *func_output;
-       OUTPUT_FUNC_ENTRY();
+       tdm_private_module *private_module = NULL;
+       tdm_voutput *voutput_backend = NULL;
+       tdm_func_voutput *func_voutput = NULL;
 
-       TDM_RETURN_VAL_IF_FAIL(formats != NULL, TDM_ERROR_INVALID_PARAMETER);
-       TDM_RETURN_VAL_IF_FAIL(count != NULL, TDM_ERROR_INVALID_PARAMETER);
+       tdm_private_display *private_display;
+       tdm_private_voutput *private_voutput;
+       tdm_private_output *private_output;
+       tdm_error ret = TDM_ERROR_NONE;
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
        _pthread_mutex_lock(&private_display->lock);
 
-       func_output = &private_display->func_output;
-
-       if (!func_output->output_hwc_get_video_supported_formats) {
-               /* LCOV_EXCL_START */
-               _pthread_mutex_unlock(&private_display->lock);
-               TDM_ERR("not implemented!!");
-               return TDM_ERROR_NOT_IMPLEMENTED;
-               /* LCOV_EXCL_STOP */
-       }
-
-       ret = func_output->output_hwc_get_video_supported_formats(
-                                                               private_output->output_backend, formats, count);
+       func_voutput = &private_module->func_voutput;
+       voutput_backend = private_voutput->voutput_backend;
+       private_output = private_voutput->private_output;
+       tdm_display_destroy_private_output(private_output);
+       LIST_DEL(&private_voutput->link);
+       free(private_voutput);
+       if (func_voutput->voutput_destroy)
+               ret = func_voutput->voutput_destroy(voutput_backend);
 
        _pthread_mutex_unlock(&private_display->lock);
 
        return ret;
 }
 
-INTERN void
-tdm_output_call_change_handler_internal(tdm_private_output *private_output,
-                                                                               struct list_head *change_handler_list,
-                                                                               tdm_output_change_type type,
-                                                                               tdm_value value,
-                                                                               int no_check_thread_id)
+INTERN tdm_error
+tdm_voutput_set_available_mode(tdm_voutput *voutput, const tdm_output_mode *modes, int count)
 {
        tdm_private_display *private_display;
-       tdm_private_change_handler *change_handler = NULL;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       TDM_RETURN_IF_FAIL(TDM_MUTEX_IS_LOCKED());
-       TDM_RETURN_IF_FAIL(private_output);
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(modes != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(count != 0, TDM_ERROR_INVALID_PARAMETER);
 
-       private_display = private_output->private_display;
-       if (!tdm_thread_in_display_thread(syscall(SYS_gettid))) {
-               if (type & TDM_OUTPUT_CHANGE_CONNECTION)
-                       TDM_INFO("output(%d) changed: %s (%d)",
-                                        private_output->pipe, tdm_status_str(value.u32), value.u32);
-               if (type & TDM_OUTPUT_CHANGE_DPMS)
-                       TDM_INFO("output(%d) changed: dpms %s (%d)",
-                                        private_output->pipe, tdm_dpms_str(value.u32), value.u32);
-       }
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       if (LIST_IS_EMPTY(change_handler_list))
-               return;
+       _pthread_mutex_lock(&private_display->lock);
 
-       LIST_FOR_EACH_ENTRY(change_handler, change_handler_list, link) {
-               if (!no_check_thread_id && change_handler->owner_tid != syscall(SYS_gettid))
-                       TDM_NEVER_GET_HERE();
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_set_available_mode)
+               ret = func_voutput->voutput_set_available_mode(private_voutput->voutput_backend, modes, count);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
 
-               _pthread_mutex_unlock(&private_display->lock);
-               change_handler->func(private_output, type,
-                                                        value, change_handler->user_data);
-               _pthread_mutex_lock(&private_display->lock);
-       }
-}
+       _pthread_mutex_unlock(&private_display->lock);
 
+       return ret;
+}
 
-/* gets called on behalf of the ecore-main-loop thread */
 INTERN tdm_error
-tdm_output_cb_need_validate(tdm_private_output *private_output)
+tdm_voutput_set_physical_size(tdm_voutput *voutput, unsigned int mmwidth, unsigned int mmheight)
 {
-       TDM_RETURN_VAL_IF_FAIL(private_output != NULL, TDM_ERROR_INVALID_PARAMETER);
+       tdm_private_display *private_display;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       TDM_INFO("tdm-backend asks for revalidation for the output:%p.", private_output);
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(mmwidth != 0, TDM_ERROR_INVALID_PARAMETER);
+       TDM_RETURN_VAL_IF_FAIL(mmheight != 0, TDM_ERROR_INVALID_PARAMETER);
 
-       if (private_output->need_validate.hndl)
-               private_output->need_validate.hndl((tdm_output*)private_output);
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       return TDM_ERROR_NONE;
+       _pthread_mutex_lock(&private_display->lock);
+
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_set_physical_size)
+               ret = func_voutput->voutput_set_physical_size(private_voutput->voutput_backend, mmwidth, mmheight);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
 }
 
-/* gets called on behalf of the tdm-thread */
-static tdm_error
-_need_validate_handler(int fd, tdm_event_loop_mask mask, void *user_data)
+INTERN tdm_error
+tdm_voutput_connect(tdm_voutput *voutput)
 {
-       tdm_thread_cb_need_validate ev;
-       tdm_private_output *private_output;
-       tdm_error ret;
+       tdm_private_display *private_display;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       private_output = (tdm_private_output *)user_data;
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       ev.base.type = TDM_THREAD_CB_NEED_VALIDATE;
-       ev.base.length = sizeof ev;
-       ev.o = private_output;
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       ret = tdm_thread_send_cb(private_output->private_display->private_loop, &ev.base);
-       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+       _pthread_mutex_lock(&private_display->lock);
 
-       TDM_INFO("tdm-thread: get a 'need to revalidate' event for the ouptut:%p.", private_output);
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_connect)
+               ret = func_voutput->voutput_connect(private_voutput->voutput_backend);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
 
-       /* who cares about this? */
-       return TDM_ERROR_NONE;
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
 }
 
 INTERN tdm_error
-tdm_output_need_validate_event_init(tdm_output *output)
+tdm_voutput_disconnect(tdm_voutput *voutput)
 {
-       int fd;
+       tdm_private_display *private_display;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       OUTPUT_FUNC_ENTRY();
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       if (!(private_output->caps.capabilities & TDM_OUTPUT_CAPABILITY_HWC)) {
-               TDM_ERR("output(%p) not support HWC", private_output);
-               return TDM_ERROR_BAD_REQUEST;
-       }
+       _pthread_mutex_lock(&private_display->lock);
 
-       /* build in eventfd fds into event_loop listened & handled by the tdm-thread */
-       fd = eventfd(0, 0);
-       TDM_WARNING_IF_FAIL(fd >= 0);
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_disconnect)
+               ret = func_voutput->voutput_disconnect(private_voutput->voutput_backend);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
 
-       tdm_event_loop_add_fd_handler(private_display, fd,      TDM_EVENT_LOOP_READABLE,
-                       _need_validate_handler, private_output, &ret);
-       TDM_WARNING_IF_FAIL(ret == TDM_ERROR_NONE);
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
+}
+
+/* LCOV_EXCL_START */
+INTERN tdm_error
+tdm_voutput_set_commit_func(tdm_voutput *voutput, tdm_voutput_commit_handler func)
+{
+       tdm_private_display *private_display;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
+
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       private_output->need_validate.event_fd = fd;
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       TDM_INFO("register an output:%p for the revalidation, event_fd:%d.", private_output, fd);
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_set_commit_func)
+               ret = func_voutput->voutput_set_commit_func(private_voutput->voutput_backend, func);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
 
        return ret;
 }
 
 INTERN tdm_error
-tdm_output_choose_commit_per_vblank_mode(tdm_private_output *private_output, int mode)
+tdm_voutput_commit_done(tdm_voutput *voutput)
 {
-       if (!private_output)
-               return TDM_ERROR_INVALID_PARAMETER;
+       tdm_private_display *private_display;
+       tdm_private_module *private_module = NULL;
+       tdm_private_voutput *private_voutput;
+       tdm_func_voutput *func_voutput = NULL;
+       tdm_error ret = TDM_ERROR_NONE;
 
-       if (mode < 0 || mode > 2)
-               return TDM_ERROR_INVALID_PARAMETER;
+       TDM_RETURN_VAL_IF_FAIL(voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
 
-       private_output->commit_per_vblank = mode;
+       private_voutput = (tdm_private_voutput*)voutput;
+       private_display = private_voutput->private_display;
+       private_module = private_voutput->private_module;
+       TDM_RETURN_VAL_IF_FAIL(private_module == private_display->virtual_module, TDM_ERROR_BAD_MODULE);
 
-       if (private_output->commit_per_vblank == 0)
-               TDM_INFO("commit per vblank: disable");
-       else if (private_output->commit_per_vblank == 1)
-               TDM_INFO("commit per vblank: enable (1 layer)");
-       else if (private_output->commit_per_vblank == 2)
-               TDM_INFO("commit per vblank: enable (previous commit)");
+       _pthread_mutex_lock(&private_display->lock);
 
-       return TDM_ERROR_NONE;
+       func_voutput = &private_module->func_voutput;
+       if (func_voutput->voutput_commit_done)
+               ret = func_voutput->voutput_commit_done(private_voutput->voutput_backend);
+       else
+               ret = TDM_ERROR_NOT_IMPLEMENTED;
+
+       _pthread_mutex_unlock(&private_display->lock);
+
+       return ret;
 }
+/* LCOV_EXCL_STOP */