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    const char *str = udata;
57    bool usecopybit = false;
58    int compositionType =
59        qdutils::QCCompositionType::getInstance().getCompositionType();
60
61    if (compositionType & (qdutils::COMPOSITION_TYPE_DYN |
62                           qdutils::COMPOSITION_TYPE_MDP |
63                           qdutils::COMPOSITION_TYPE_C2D)) {
64        usecopybit = true;
65    }
66
67    if(!strcasestr("change@/devices/virtual/switch/hdmi", str) &&
68       !strcasestr("change@/devices/virtual/switch/wfd", str)) {
69        ALOGD_IF(UEVENT_DEBUG, "%s: Not Ext Disp Event ", __FUNCTION__);
70        return;
71    }
72    int connected = -1; // initial value - will be set to  1/0 based on hotplug
73    int extDpyNum = HWC_DISPLAY_EXTERNAL;
74    char property[PROPERTY_VALUE_MAX];
75    if((property_get("persist.sys.wfd.virtual", property, NULL) > 0) &&
76            (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
77             (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
78        // This means we are using Google API to trigger WFD Display
79        extDpyNum = HWC_DISPLAY_VIRTUAL;
80
81    }
82
83    int dpy = isHDMI(str) ? HWC_DISPLAY_EXTERNAL : extDpyNum;
84
85    // update extDpyNum
86    ctx->mExtDisplay->setExtDpyNum(dpy);
87
88    // parse HDMI/WFD switch state for connect/disconnect
89    // for HDMI:
90    // The event will be of the form:
91    // change@/devices/virtual/switch/hdmi ACTION=change
92    // SWITCH_STATE=1 or SWITCH_STATE=0
93    while(*str) {
94        if (!strncmp(str, "SWITCH_STATE=", strlen("SWITCH_STATE="))) {
95            connected = atoi(str + strlen("SWITCH_STATE="));
96            //Disabled until SF calls unblank
97            ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].isActive = false;
98            //Ignored for Virtual Displays
99            //ToDo: we can do this in a much better way
100            ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].isActive = true;
101            break;
102        }
103        str += strlen(str) + 1;
104        if (str - udata >= len)
105            break;
106    }
107
108    switch(connected) {
109        case EXTERNAL_OFFLINE:
110            {   // disconnect event
111                ctx->mExtDisplay->processUEventOffline(udata);
112                if(ctx->mFBUpdate[dpy]) {
113                    Locker::Autolock _l(ctx->mExtSetLock);
114                    delete ctx->mFBUpdate[dpy];
115                    ctx->mFBUpdate[dpy] = NULL;
116                }
117                if(ctx->mCopyBit[dpy]){
118                    Locker::Autolock _l(ctx->mExtSetLock);
119                    delete ctx->mCopyBit[dpy];
120                    ctx->mCopyBit[dpy] = NULL;
121                }
122                if(ctx->mMDPComp[dpy]) {
123                    delete ctx->mMDPComp[dpy];
124                    ctx->mMDPComp[dpy] = NULL;
125                }
126                ALOGD("%s sending hotplug: connected = %d and dpy:%d",
127                      __FUNCTION__, connected, dpy);
128                ctx->dpyAttr[dpy].connected = false;
129                Locker::Autolock _l(ctx->mExtSetLock);
130                //hwc comp could be on
131                ctx->proc->hotplug(ctx->proc, dpy, connected);
132                break;
133            }
134        case EXTERNAL_ONLINE:
135            {   // connect case
136                ctx->mExtDispConfiguring = true;
137                ctx->mExtDisplay->processUEventOnline(udata);
138                ctx->mFBUpdate[dpy] =
139                        IFBUpdate::getObject(ctx->dpyAttr[dpy].xres, dpy);
140                ctx->dpyAttr[dpy].isPause = false;
141                if(usecopybit)
142                    ctx->mCopyBit[dpy] = new CopyBit();
143                ctx->mMDPComp[dpy] =  MDPComp::getObject(
144                        ctx->dpyAttr[dpy].xres, dpy);
145                ALOGD("%s sending hotplug: connected = %d", __FUNCTION__,
146                        connected);
147                ctx->dpyAttr[dpy].connected = true;
148                Locker::Autolock _l(ctx->mExtSetLock); //hwc comp could be on
149                ctx->proc->hotplug(ctx->proc, dpy, connected);
150                break;
151            }
152        case EXTERNAL_PAUSE:
153            {   // pause case
154                ALOGD("%s Received Pause event",__FUNCTION__);
155                // This is required to ensure that composition
156                // fall back to FB, closing all MDP pipes.
157                ctx->mExtDispConfiguring = true;
158                ctx->dpyAttr[dpy].isActive = true;
159                ctx->dpyAttr[dpy].isPause = true;
160                break;
161            }
162        case EXTERNAL_RESUME:
163            {  // resume case
164                ALOGD("%s Received resume event",__FUNCTION__);
165                ctx->dpyAttr[dpy].isActive = true;
166                ctx->dpyAttr[dpy].isPause = false;
167                break;
168            }
169        default:
170            {
171                ALOGE("ignore event and connected:%d",connected);
172                break;
173            }
174    }
175}
176
177static void *uevent_loop(void *param)
178{
179    int len = 0;
180    static char udata[PAGE_SIZE];
181    hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
182    char thread_name[64] = HWC_UEVENT_THREAD_NAME;
183    prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
184    setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
185    uevent_init();
186
187    while(1) {
188        len = uevent_next_event(udata, sizeof(udata) - 2);
189        handle_uevent(ctx, udata, len);
190    }
191
192    return NULL;
193}
194
195void init_uevent_thread(hwc_context_t* ctx)
196{
197    pthread_t uevent_thread;
198    int ret;
199
200    ALOGI("Initializing UEVENT Thread");
201    ret = pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
202    if (ret) {
203        ALOGE("%s: failed to create %s: %s", __FUNCTION__,
204            HWC_UEVENT_THREAD_NAME, strerror(ret));
205    }
206}
207
208}; //namespace
209