1
2/*
3 * Copyright (C) 2010 The Android Open Source Project
4 * Copyright (C) 2012, The Linux Foundation. All rights reserved.
5 *
6 * Not a Contribution, Apache license notifications and license are
7 * retained for attribution purposes only.
8
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21#define UEVENT_DEBUG 0
22#include <hardware_legacy/uevent.h>
23#include <utils/Log.h>
24#include <sys/resource.h>
25#include <sys/prctl.h>
26#include <string.h>
27#include <stdlib.h>
28#include "hwc_utils.h"
29#include "hwc_fbupdate.h"
30#include "hwc_mdpcomp.h"
31#include "hwc_copybit.h"
32#include "comptype.h"
33#include "external.h"
34
35namespace qhwc {
36
37#define HWC_UEVENT_THREAD_NAME "hwcUeventThread"
38
39/* External Display states */
40enum {
41    EXTERNAL_OFFLINE = 0,
42    EXTERNAL_ONLINE,
43    EXTERNAL_PAUSE,
44    EXTERNAL_RESUME
45};
46
47static bool isHDMI(const char* str)
48{
49    if(strcasestr("change@/devices/virtual/switch/hdmi", str))
50        return true;
51    return false;
52}
53
54static void handle_uevent(hwc_context_t* ctx, const char* udata, int len)
55{
56    int vsync = 0;
57    int64_t timestamp = 0;
58    const char *str = udata;
59    bool usecopybit = false;
60    int compositionType =
61        qdutils::QCCompositionType::getInstance().getCompositionType();
62
63    if (compositionType & (qdutils::COMPOSITION_TYPE_DYN |
64                           qdutils::COMPOSITION_TYPE_MDP |
65                           qdutils::COMPOSITION_TYPE_C2D)) {
66        usecopybit = true;
67    }
68
69    if(!strcasestr("change@/devices/virtual/switch/hdmi", str) &&
70       !strcasestr("change@/devices/virtual/switch/wfd", str)) {
71        ALOGD_IF(UEVENT_DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
72        return;
73    }
74    int connected = -1; // initial value - will be set to  1/0 based on hotplug
75    int extDpyNum = HWC_DISPLAY_EXTERNAL;
76    char property[PROPERTY_VALUE_MAX];
77    if((property_get("persist.sys.wfd.virtual", property, NULL) > 0) &&
78            (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
79             (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
80        // This means we are using Google API to trigger WFD Display
81        extDpyNum = HWC_DISPLAY_VIRTUAL;
82
83    }
84
85    int dpy = isHDMI(str) ? HWC_DISPLAY_EXTERNAL : extDpyNum;
86
87    // update extDpyNum
88    ctx->mExtDisplay->setExtDpyNum(dpy);
89
90    // parse HDMI/WFD switch state for connect/disconnect
91    // for HDMI:
92    // The event will be of the form:
93    // change@/devices/virtual/switch/hdmi ACTION=change
94    // SWITCH_STATE=1 or SWITCH_STATE=0
95    while(*str) {
96        if (!strncmp(str, "SWITCH_STATE=", strlen("SWITCH_STATE="))) {
97            connected = atoi(str + strlen("SWITCH_STATE="));
98            //Disabled until SF calls unblank
99            ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].isActive = false;
100            //Ignored for Virtual Displays
101            //ToDo: we can do this in a much better way
102            ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].isActive = true;
103            break;
104        }
105        str += strlen(str) + 1;
106        if (str - udata >= len)
107            break;
108    }
109
110    switch(connected) {
111        case EXTERNAL_OFFLINE:
112            {   // disconnect event
113                ctx->mExtDisplay->processUEventOffline(udata);
114                if(ctx->mFBUpdate[dpy]) {
115                    Locker::Autolock _l(ctx->mExtSetLock);
116                    delete ctx->mFBUpdate[dpy];
117                    ctx->mFBUpdate[dpy] = NULL;
118                }
119                if(ctx->mCopyBit[dpy]){
120                    Locker::Autolock _l(ctx->mExtSetLock);
121                    delete ctx->mCopyBit[dpy];
122                    ctx->mCopyBit[dpy] = NULL;
123                }
124                if(ctx->mMDPComp[dpy]) {
125                    delete ctx->mMDPComp[dpy];
126                    ctx->mMDPComp[dpy] = NULL;
127                }
128                ALOGD("%s sending hotplug: connected = %d and dpy:%d",
129                      __FUNCTION__, connected, dpy);
130                ctx->dpyAttr[dpy].connected = false;
131                Locker::Autolock _l(ctx->mExtSetLock);
132                //hwc comp could be on
133                ctx->proc->hotplug(ctx->proc, dpy, connected);
134                break;
135            }
136        case EXTERNAL_ONLINE:
137            {   // connect case
138                ctx->mExtDispConfiguring = true;
139                ctx->mExtDisplay->processUEventOnline(udata);
140                ctx->mFBUpdate[dpy] =
141                        IFBUpdate::getObject(ctx->dpyAttr[dpy].xres, dpy);
142                ctx->dpyAttr[dpy].isPause = false;
143                if(usecopybit)
144                    ctx->mCopyBit[dpy] = new CopyBit();
145                ctx->mMDPComp[dpy] =  MDPComp::getObject(
146                        ctx->dpyAttr[dpy].xres, dpy);
147                ALOGD("%s sending hotplug: connected = %d", __FUNCTION__,
148                        connected);
149                ctx->dpyAttr[dpy].connected = true;
150                Locker::Autolock _l(ctx->mExtSetLock); //hwc comp could be on
151                ctx->proc->hotplug(ctx->proc, dpy, connected);
152                break;
153            }
154        case EXTERNAL_PAUSE:
155            {   // pause case
156                ALOGD("%s Received Pause event",__FUNCTION__);
157                // This is required to ensure that composition
158                // fall back to FB, closing all MDP pipes.
159                ctx->mExtDispConfiguring = true;
160                ctx->dpyAttr[dpy].isActive = true;
161                ctx->dpyAttr[dpy].isPause = true;
162                break;
163            }
164        case EXTERNAL_RESUME:
165            {  // resume case
166                ALOGD("%s Received resume event",__FUNCTION__);
167                ctx->dpyAttr[dpy].isActive = true;
168                ctx->dpyAttr[dpy].isPause = false;
169                break;
170            }
171        default:
172            {
173                ALOGE("ignore event and connected:%d",connected);
174                break;
175            }
176    }
177}
178
179static void *uevent_loop(void *param)
180{
181    int len = 0;
182    static char udata[PAGE_SIZE];
183    hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
184    char thread_name[64] = HWC_UEVENT_THREAD_NAME;
185    prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
186    setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
187    uevent_init();
188
189    while(1) {
190        len = uevent_next_event(udata, sizeof(udata) - 2);
191        handle_uevent(ctx, udata, len);
192    }
193
194    return NULL;
195}
196
197void init_uevent_thread(hwc_context_t* ctx)
198{
199    pthread_t uevent_thread;
200    int ret;
201
202    ALOGI("Initializing UEVENT Thread");
203    ret = pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
204    if (ret) {
205        ALOGE("%s: failed to create %s: %s", __FUNCTION__,
206            HWC_UEVENT_THREAD_NAME, strerror(ret));
207    }
208}
209
210}; //namespace
211