/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (C) 2012, The Linux Foundation. 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 UEVENT_DEBUG 0
#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_fbupdate.h"
#include "hwc_mdpcomp.h"
#include "hwc_copybit.h"
#include "comptype.h"
#include "external.h"
#include "mdp_version.h"
namespace qhwc {
#define HWC_UEVENT_THREAD_NAME "hwcUeventThread"
/* External Display states */
enum {
EXTERNAL_OFFLINE = 0,
EXTERNAL_ONLINE,
EXTERNAL_PAUSE,
EXTERNAL_RESUME
};
static bool isHDMI(const char* str)
{
if(strcasestr("change@/devices/virtual/switch/hdmi", str))
return true;
return false;
}
static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
{
int vsync = 0;
int64_t timestamp = 0;
const char *str = udata;
if(!strcasestr("change@/devices/virtual/switch/hdmi", str) &&
!strcasestr("change@/devices/virtual/switch/wfd", str)) {
ALOGD_IF(UEVENT_DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
return;
}
int connected = -1; // initial value - will be set to 1/0 based on hotplug
int extDpyNum = HWC_DISPLAY_EXTERNAL;
char property[PROPERTY_VALUE_MAX];
if((property_get("persist.sys.wfd.virtual", property, NULL) > 0) &&
(!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
(!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
// This means we are using Google API to trigger WFD Display
extDpyNum = HWC_DISPLAY_VIRTUAL;
}
int dpy = isHDMI(str) ? HWC_DISPLAY_EXTERNAL : extDpyNum;
// update extDpyNum
ctx->mExtDisplay->setExtDpyNum(dpy);
// parse HDMI/WFD switch state for connect/disconnect
// for HDMI:
// The event will be of the form:
// change@/devices/virtual/switch/hdmi ACTION=change
// SWITCH_STATE=1 or SWITCH_STATE=0
while(*str) {
if (!strncmp(str, "SWITCH_STATE=", strlen("SWITCH_STATE="))) {
connected = atoi(str + strlen("SWITCH_STATE="));
//Disabled until SF calls unblank
ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].isActive = false;
//Ignored for Virtual Displays
//ToDo: we can do this in a much better way
ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].isActive = true;
break;
}
str += strlen(str) + 1;
if (str - udata >= len)
break;
}
switch(connected) {
case EXTERNAL_OFFLINE:
{ // disconnect event
ctx->mExtDisplay->processUEventOffline(udata);
Locker::Autolock _l(ctx->mDrawLock);
clearSecondaryObjs(ctx, dpy);
ALOGD("%s sending hotplug: connected = %d and dpy:%d",
__FUNCTION__, connected, dpy);
ctx->dpyAttr[dpy].connected = false;
//hwc comp could be on
ctx->proc->hotplug(ctx->proc, dpy, connected);
break;
}
case EXTERNAL_ONLINE:
{ // connect case
{
//Force composition to give up resources like pipes and
//close fb. For example if assertive display is going on,
//fb2 could be open, thus connecting Layer Mixer#0 to
//WriteBack module. If HDMI attempts to open fb1, the driver
//will try to attach Layer Mixer#0 to HDMI INT, which will
//fail, since Layer Mixer#0 is still connected to WriteBack.
//This block will force composition to close fb2 in above
//example.
Locker::Autolock _l(ctx->mDrawLock);
ctx->dpyAttr[dpy].isConfiguring = true;
ctx->dpyAttr[dpy].connected = false;
ctx->proc->invalidate(ctx->proc);
}
//2 cycles for slower content
usleep(ctx->dpyAttr[HWC_DISPLAY_PRIMARY].vsync_period
* 2 / 1000);
ctx->mExtDisplay->processUEventOnline(udata);
{
Locker::Autolock _l(ctx->mDrawLock);
ctx->dpyAttr[dpy].isPause = false;
setupSecondaryObjs(ctx, dpy);
ALOGD("%s sending hotplug: connected = %d", __FUNCTION__,
connected);
ctx->dpyAttr[dpy].connected = true;
ctx->proc->hotplug(ctx->proc, dpy, connected);
}
break;
}
case EXTERNAL_PAUSE:
{ // pause case
ALOGD("%s Received Pause event",__FUNCTION__);
Locker::Autolock _l(ctx->mDrawLock);
ctx->dpyAttr[dpy].isActive = true;
ctx->dpyAttr[dpy].isPause = true;
break;
}
case EXTERNAL_RESUME:
{ // resume case
ALOGD("%s Received resume event",__FUNCTION__);
//Treat Resume as Online event
//Since external didnt have any pipes, force primary to give up
//its pipes; we don't allow inter-mixer pipe transfers.
{
Locker::Autolock _l(ctx->mDrawLock);
ctx->dpyAttr[dpy].isConfiguring = true;
ctx->dpyAttr[dpy].isActive = true;
ctx->proc->invalidate(ctx->proc);
}
usleep(ctx->dpyAttr[HWC_DISPLAY_PRIMARY].vsync_period
* 2 / 1000);
//At this point external has all the pipes it would need.
{
Locker::Autolock _l(ctx->mDrawLock);
ctx->dpyAttr[dpy].isPause = false;
ctx->proc->invalidate(ctx->proc);
}
break;
}
default:
{
ALOGE("ignore event and connected:%d",connected);
break;
}
}
}
static void *uevent_loop(void *param)
{
int len = 0;
static char udata[PAGE_SIZE];
hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
char thread_name[64] = HWC_UEVENT_THREAD_NAME;
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;
int ret;
ALOGI("Initializing UEVENT Thread");
ret = pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
if (ret) {
ALOGE("%s: failed to create %s: %s", __FUNCTION__,
HWC_UEVENT_THREAD_NAME, strerror(ret));
}
}
}; //namespace