From 5b11cd1859acaf702bff92e255beab372b7421ee Mon Sep 17 00:00:00 2001
From: SooChan Lim <sc1.lim@samsung.com>
Date: Mon, 12 Feb 2018 10:29:35 +0900
Subject: [PATCH] hwc: add tdm_hwc_unset_buffer

Change-Id: Ia00e4ea2e07217fa7c6b42cf9a4ab0aefa4053e7
---
 include/tdm.h         | 14 ++++++++++++++
 include/tdm_backend.h | 13 +++++++++++++
 src/tdm_hwc_window.c  | 26 ++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/include/tdm.h b/include/tdm.h
index d6bc82a..7be0a14 100644
--- a/include/tdm.h
+++ b/include/tdm.h
@@ -1039,6 +1039,20 @@ tdm_error
 tdm_hwc_window_set_buffer(tdm_hwc_window *hwc_window, tbm_surface_h buffer);
 
 /**
+ * @brief Unset a TBM buffer to a window object
+ * @details A TBM buffer will be applied when the output object of a layer
+ * object is committed.
+ * @param[in] hwc_window A window object
+ * @return #TDM_ERROR_NONE if success. Otherwise, error value.
+ * @return #TDM_ERROR_BUSY if #hwc_window can't be updated right now, this
+ * can happen if #hwc_window is involved in the smooth transition from
+ * DEVICE to CLIENT, this shouldn't be interpreted like some critical error.
+ * @since 2.0.0
+ */
+tdm_error
+tdm_hwc_window_unset_buffer(tdm_hwc_window *hwc_window);
+
+/**
  * @brief Set a flags to a window object
  * @param[in] hwc_window A window object
  * @param[in] flags A hwc_window flags
diff --git a/include/tdm_backend.h b/include/tdm_backend.h
index 297c74a..a3bd3b3 100644
--- a/include/tdm_backend.h
+++ b/include/tdm_backend.h
@@ -896,6 +896,19 @@ typedef struct _tdm_func_window {
 									   tbm_surface_h buffer);
 
 	/**
+	 * @brief Unset a TDM buffer to a window object
+	 * @details A TDM buffer will be applied when the output object
+	 * of a layer object is committed.
+	 * @param[in] hwc_window A window object
+	 * @return #TDM_ERROR_NONE if success. Otherwise, error value.
+	 *
+	 * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
+	 * be updated right now, this won't be interpreted like some critical
+	 * error.
+	 */
+	tdm_error (*hwc_window_unset_buffer)(tdm_hwc_window *hwc_window);
+
+	/**
 	 * @brief Set a flags to a window object
 	 * @param[in] hwc_window A window object
 	 * @param[in] flags A hwc_window flags
diff --git a/src/tdm_hwc_window.c b/src/tdm_hwc_window.c
index 73f92c0..96d2698 100644
--- a/src/tdm_hwc_window.c
+++ b/src/tdm_hwc_window.c
@@ -236,6 +236,32 @@ tdm_hwc_window_set_buffer(tdm_hwc_window *hwc_window, tbm_surface_h buffer)
 	return ret;
 }
 
+EXTERN tdm_error
+tdm_hwc_window_unset_buffer(tdm_hwc_window *hwc_window)
+{
+	tdm_func_hwc_window *func_hwc_window;
+
+	HWC_WINDOW_FUNC_ENTRY();
+
+	_pthread_mutex_lock(&private_display->lock);
+
+	func_hwc_window = &private_display->func_hwc_window;
+
+	if (!func_hwc_window->hwc_window_unset_buffer) {
+		/* LCOV_EXCL_START */
+		_pthread_mutex_unlock(&private_display->lock);
+		TDM_ERR("not implemented!!");
+		return TDM_ERROR_NOT_IMPLEMENTED;
+		/* LCOV_EXCL_STOP */
+	}
+
+	ret = func_hwc_window->hwc_window_unset_buffer(private_hwc_window->hwc_window_backend);
+
+	_pthread_mutex_unlock(&private_display->lock);
+
+	return ret;
+}
+
 INTERN tdm_hwc_window *
 tdm_hwc_window_create_internal(tdm_private_output *private_output, int is_video,
 								   tdm_error *error)
-- 
2.7.4