display: Add API to set qsync mode.

- Add qsync mode enums and API to set a mode.

Change-Id: I172f238ca16bdaf96e4cbfb0946c2c3fc32800fe
CRs-Fixed: 2497000

display/config/1.11/IDisplayConfig.hal

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2019 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ *      copyright notice, this list of conditions and the following
+ *      disclaimer in the documentation and/or other materials provided
+ *      with the distribution.
+ *    * Neither the name of The Linux Foundation. nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package vendor.display.config@1.11;
+
+import @1.10::IDisplayConfig;
+
+interface IDisplayConfig extends @1.10::IDisplayConfig {
+    enum QsyncMode : int32_t {
+        /* Clear previous qsync mode if any */
+        NONE,
+
+        /*
+         * Enable qsync only for the next frame. Qsync mode will be
+         * automatically cleared after next frame has been composed.
+         * Subsequent frames will not be affected.
+         */
+        WAIT_FOR_FENCES_ONE_FRAME,
+
+        /*
+         * Enable qsync for every frame from next cycle onwards. Vsync timelines
+         * will be extended only if a frame has been committed to HWC i.e. if
+         * HWC does not receive frames from client, vsync will be triggered at
+         * normal intervals. This is similar to setting qsync mode as
+         * WAIT_FOR_FENCES_ONE_FRAME with every commit.
+         */
+        WAIT_FOR_FENCES_EACH_FRAME,
+
+        /*
+         * Enable qsync for every vsync interrupt from next cycle onwards.
+         * Vsync timelines will be extended to maximum stretch possible in an
+         * anticipation that a frame will be commited shortly. If frames are
+         * not commited, final frame rate will eventually drop to lowest
+         * possible frame rate.
+         */
+        WAIT_FOR_COMMIT_EACH_FRAME,
+    };
+
+    /*
+     * Set the desired qsync mode which will ideally take effect from next
+     * composition cycle. Mode change may take longer than one cycle if there
+     * is a conflict with current operation mode.
+     *
+     * @param disp_id display id.
+     * @param mode desired qsync mode.
+     *
+     * @return error is NONE upon success.
+     */
+    @callflow(next="*")
+    setQsyncMode(uint32_t disp_id, QsyncMode mode)  generates (int32_t error);
+};

display/current.txt

@@ -47,3 +47,4 @@ a34b984a4eee8b76a123390002843f050288a92f0f0c6b8d576930f738858f4c vendor.display.
 fd36f8dbe80403d93f0e94651ae4efa1aa22053351e7783f5d99457cff9dbacc vendor.display.config@1.9::IDisplayConfig
 f78bba2991501438ad9ca1a0812f6a2a3991cb178bec4c00bd8eec841777d8d9 vendor.display.config@1.10::IDisplayConfig
 50369a070405a1f0cac44648f39ca32864c1339896d6eb16524b32fff9e95f03 vendor.display.config@1.10::IDisplayCWBCallback
+10a290fc22df7680d00c53370870d5e941b7d60afcb94e90d2dd03369e7ccebc vendor.display.config@1.11::IDisplayConfig