b25918ac52
- There is a race condition window between initializing hwcomposer as a whole and registering callback functions for when the uevents arrive. We can fix this issue by delaying the uevent thread kick off until the callback functions are registered. - Add thread name to uevent thread Change-Id: I30e23b411b92b6578f186b641f562462a8f23179
114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/*
|
|
* 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_UEVENTS_H
|
|
#define HWC_UEVENTS_H
|
|
#include <hardware_legacy/uevent.h>
|
|
#include <utils/Log.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/prctl.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "hwc_utils.h"
|
|
#include "hwc_external.h"
|
|
|
|
namespace qhwc {
|
|
|
|
const char* MSMFB_DEVICE_FB0 = "change@/devices/virtual/graphics/fb0";
|
|
const char* MSMFB_DEVICE_FB1 = "change@/devices/virtual/graphics/fb1";
|
|
const char* MSMFB_FB_NODE = "fb";
|
|
|
|
static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
|
|
{
|
|
int vsync = 0;
|
|
int64_t timestamp = 0;
|
|
const char *str = udata;
|
|
hwc_procs* proc = (hwc_procs*)ctx->device.reserved_proc[0];
|
|
int hdmiconnected = ctx->mExtDisplay->getExternalDisplay();
|
|
|
|
if(!strcasestr(str, "@/devices/virtual/graphics/fb")) {
|
|
ALOGD_IF(DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
if(ctx->mExtDisplay->isHDMIConfigured() &&
|
|
(hdmiconnected == EXTERN_DISPLAY_FB1))
|
|
vsync = !strncmp(str, MSMFB_DEVICE_FB1, strlen(MSMFB_DEVICE_FB1));
|
|
else
|
|
vsync = !strncmp(str, MSMFB_DEVICE_FB0, strlen(MSMFB_DEVICE_FB0));
|
|
|
|
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;
|
|
}
|
|
return;
|
|
}
|
|
|
|
// 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;
|
|
if(!(strncmp(str,"online@",strlen("online@")))) {
|
|
ctx->mExtDisplay->processUEventOnline(str);
|
|
} else if(!(strncmp(str,"offline@",strlen("offline@")))) {
|
|
ctx->mExtDisplay->processUEventOffline(str);
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
char thread_name[64] = "hwcUeventThread";
|
|
prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
|
|
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;
|
|
ALOGI("Initializing UEvent Listener Thread");
|
|
pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
|
|
}
|
|
|
|
}; //namespace
|
|
#endif //HWC_UEVENTS_H
|