0b44443a34
the hdmi driver can send change uevent anytime, in which case, the connected state was getting set to 0, due to its default value. Change-Id: I22dc96acda0272661750277d62c5c11c5156fb3b
117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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* Copyright (C) 2012, Code Aurora Forum. All rights reserved.
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*
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* Not a Contribution, Apache license notifications and license are
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* retained for attribution purposes only.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define DEBUG 0
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#ifndef HWC_OBSERVER_H
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#define HWC_OBSERVER_H
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#include <hardware_legacy/uevent.h>
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#include <utils/Log.h>
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#include <sys/resource.h>
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#include <string.h>
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#include <stdlib.h>
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#include "hwc_utils.h"
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#include "hwc_external.h"
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namespace qhwc {
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const char* MSMFB_DEVICE_FB0 = "change@/devices/virtual/graphics/fb0";
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const char* MSMFB_DEVICE_FB1 = "change@/devices/virtual/graphics/fb1";
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const char* MSMFB_HDMI_NODE = "fb1";
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static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
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{
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int vsync = 0;
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char* hdmi;
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int64_t timestamp = 0;
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const char *str = udata;
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hwc_procs* proc = (hwc_procs*)ctx->device.reserved_proc[0];
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int hdmiconnected = ctx->mExtDisplay->getExternalDisplay();
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if(!strcasestr(str, "@/devices/virtual/graphics/fb")) {
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ALOGD_IF(DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
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return;
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}
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if(hdmiconnected)
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vsync = !strncmp(str, MSMFB_DEVICE_FB1, strlen(MSMFB_DEVICE_FB1));
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else
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vsync = !strncmp(str, MSMFB_DEVICE_FB0, strlen(MSMFB_DEVICE_FB0));
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hdmi = strcasestr(str, MSMFB_HDMI_NODE);
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if(vsync) {
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str += strlen(str) + 1;
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while(*str) {
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if (!strncmp(str, "VSYNC=", strlen("VSYNC="))) {
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timestamp = strtoull(str + strlen("VSYNC="), NULL, 0);
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proc->vsync(proc, 0, timestamp);
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}
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str += strlen(str) + 1;
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if(str - udata >= len)
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break;
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}
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return;
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}
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if(hdmi) {
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// parse HDMI events
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// The event will be of the form:
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// change@/devices/virtual/graphics/fb1 ACTION=change
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// DEVPATH=/devices/virtual/graphics/fb1
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// SUBSYSTEM=graphics HDCP_STATE=FAIL MAJOR=29
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// for now just parsing onlin/offline info is enough
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str = udata;
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int connected = 0;
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if(!(strncmp(str,"online@",strlen("online@")))) {
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connected = 1;
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ctx->mExtDisplay->setExternalDisplay(connected);
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} else if(!(strncmp(str,"offline@",strlen("offline@")))) {
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connected = 0;
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ctx->mExtDisplay->setExternalDisplay(connected);
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}
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}
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}
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static void *uevent_loop(void *param)
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{
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int len = 0;
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static char udata[4096];
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memset(udata, 0, sizeof(udata));
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hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
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setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
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uevent_init();
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while(1) {
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len = uevent_next_event(udata, sizeof(udata) - 2);
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handle_uevent(ctx, udata, len);
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}
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return NULL;
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}
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void init_uevent_thread(hwc_context_t* ctx)
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{
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pthread_t uevent_thread;
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pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
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}
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}; //namespace
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#endif //HWC_OBSERVER_H
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