display: Enable vsync
* Use the vsync uevents from the kernel to start
surfaceflinger composition.
* This patch also does some code cleanup
- Move copybit specific functions to copybit files.
- Cleanup verbose logging.
Change-Id: I36936e4b0a082cfb0347d8ee7d2bc936e01808e6
diff --git a/libhwcomposer/hwc_uevents.cpp b/libhwcomposer/hwc_uevents.cpp
new file mode 100644
index 0000000..a1df74b
--- /dev/null
+++ b/libhwcomposer/hwc_uevents.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * Not a Contribution, Apache license notifications and license are
+ * retained for attribution purposes only.
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define DEBUG 0
+#ifndef HWC_OBSERVER_H
+#define HWC_OBSERVER_H
+#include <hardware_legacy/uevent.h>
+#include <utils/Log.h>
+#include <sys/resource.h>
+#include <string.h>
+#include <stdlib.h>
+#include "hwc_utils.h"
+#include "hwc_external.h"
+
+namespace qhwc {
+
+const char* MSMFB_DEVICE_CHANGE = "change@/devices/virtual/graphics/fb0";
+const char* MSMFB_HDMI_NODE = "fb1";
+
+static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
+{
+ int vsync;
+ char* hdmi;
+ int64_t timestamp = 0;
+ const char *str = udata;
+ hwc_procs* proc = reinterpret_cast<hwc_procs*>(ctx->device.reserved_proc[0]);
+
+ vsync = !strncmp(str, MSMFB_DEVICE_CHANGE, strlen(MSMFB_DEVICE_CHANGE));
+ hdmi = strcasestr(str, MSMFB_HDMI_NODE);
+ if(!vsync && !hdmi)
+ return;
+ if(vsync) {
+ str += strlen(str) + 1;
+ while(*str) {
+ if (!strncmp(str, "VSYNC=", strlen("VSYNC="))) {
+ timestamp = strtoull(str + strlen("VSYNC="), NULL, 0);
+ proc->vsync(proc, 0, timestamp);
+ }
+ str += strlen(str) + 1;
+ if(str - udata >= len)
+ break;
+ }
+ }
+
+ if(hdmi) {
+ // parse HDMI events
+ // The event will be of the form:
+ // change@/devices/virtual/graphics/fb1 ACTION=change
+ // DEVPATH=/devices/virtual/graphics/fb1
+ // SUBSYSTEM=graphics HDCP_STATE=FAIL MAJOR=29
+ // for now just parsing onlin/offline info is enough
+ str = udata;
+ int connected = 0;
+ if(!(strncmp(str,"online@",strlen("online@")))) {
+ connected = 1;
+ } else if(!(strncmp(str,"offline@",strlen("offline@")))) {
+ connected = 0;
+ }
+ ctx->mExtDisplay->setExternalDisplayStatus(connected);
+ }
+
+}
+
+static void *uevent_loop(void *param)
+{
+ int len = 0;
+ static char udata[4096];
+ memset(udata, 0, sizeof(udata));
+ hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
+
+ setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
+ uevent_init();
+
+ while(1) {
+ len = uevent_next_event(udata, sizeof(udata) - 2);
+ handle_uevent(ctx, udata, len);
+ }
+
+ return NULL;
+}
+
+void init_uevent_thread(hwc_context_t* ctx)
+{
+ pthread_t uevent_thread;
+ pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
+}
+
+}; //namespace
+#endif //HWC_OBSERVER_H