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Naseer Ahmedff4f0252012-10-01 13:03:01 -04001/*
2 * Copyright (C) 2010 The Android Open Source Project
Arun Kumar K.R2aa44c62014-01-21 23:08:28 -08003 * Copyright (C) 2012-2014, The Linux Foundation. All rights reserved.
Naseer Ahmedff4f0252012-10-01 13:03:01 -04004 *
5 * Not a Contribution, Apache license notifications and license are
6 * retained for attribution purposes only.
7
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
Naseer Ahmedda10c142012-11-16 20:16:31 -050021#include <cutils/properties.h>
Naseer Ahmedff4f0252012-10-01 13:03:01 -040022#include <utils/Log.h>
23#include <fcntl.h>
Naseer Ahmedc7faa702012-10-04 15:10:30 -040024#include <sys/ioctl.h>
25#include <linux/msm_mdp.h>
Naseer Ahmedff4f0252012-10-01 13:03:01 -040026#include <sys/resource.h>
27#include <sys/prctl.h>
Naseer Ahmed8fec5c32013-06-06 17:00:15 -040028#include <poll.h>
Naseer Ahmedff4f0252012-10-01 13:03:01 -040029#include "hwc_utils.h"
30#include "string.h"
31#include "external.h"
Jeykumar Sankaran27dee262013-08-01 17:09:54 -070032#include "overlay.h"
Arun Kumar K.R2aa44c62014-01-21 23:08:28 -080033#define __STDC_FORMAT_MACROS 1
34#include <inttypes.h>
Naseer Ahmedff4f0252012-10-01 13:03:01 -040035
Naseer Ahmedff4f0252012-10-01 13:03:01 -040036namespace qhwc {
37
Iliyan Malchev0f9c3972012-10-11 15:16:15 -070038#define HWC_VSYNC_THREAD_NAME "hwcVsyncThread"
Naseer Ahmede13a6002013-07-11 13:43:18 -040039#define MAX_SYSFS_FILE_PATH 255
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -040040#define PANEL_ON_STR "panel_power_on ="
41#define ARRAY_LENGTH(array) (sizeof((array))/sizeof((array)[0]))
Dileep Kumar Reddia25a9182014-07-24 20:01:44 +053042#define MAX_THERMAL_LEVEL 3
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -040043const int MAX_DATA = 64;
44bool logvsync = false;
Iliyan Malchev0f9c3972012-10-11 15:16:15 -070045
Naseer Ahmed56601cd2013-03-05 11:34:14 -050046int hwc_vsync_control(hwc_context_t* ctx, int dpy, int enable)
47{
48 int ret = 0;
49 if(!ctx->vstate.fakevsync &&
50 ioctl(ctx->dpyAttr[dpy].fd, MSMFB_OVERLAY_VSYNC_CTRL,
51 &enable) < 0) {
52 ALOGE("%s: vsync control failed. Dpy=%d, enable=%d : %s",
53 __FUNCTION__, dpy, enable, strerror(errno));
54 ret = -errno;
55 }
56 return ret;
57}
58
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -040059static void handle_vsync_event(hwc_context_t* ctx, int dpy, char *data)
60{
61 // extract timestamp
62 uint64_t timestamp = 0;
63 if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) {
64 timestamp = strtoull(data + strlen("VSYNC="), NULL, 0);
65 }
66 // send timestamp to SurfaceFlinger
67 ALOGD_IF (logvsync, "%s: timestamp %"PRIu64" sent to SF for dpy=%d",
68 __FUNCTION__, timestamp, dpy);
69 ctx->proc->vsync(ctx->proc, dpy, timestamp);
70}
71
72static void handle_blank_event(hwc_context_t* ctx, int dpy, char *data)
73{
74 if (!strncmp(data, PANEL_ON_STR, strlen(PANEL_ON_STR))) {
Shalaj Jaina70b4352014-06-15 13:47:47 -070075 unsigned long int poweron = strtoul(data + strlen(PANEL_ON_STR), NULL, 0);
76 ALOGI("%s: dpy:%d panel power state: %ld", __FUNCTION__, dpy, poweron);
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -040077 ctx->dpyAttr[dpy].isActive = poweron ? true: false;
78 }
79}
80
Dileep Kumar Reddia25a9182014-07-24 20:01:44 +053081static void handle_thermal_event(hwc_context_t* ctx, int dpy, char *data)
82{
83 // extract thermal level
84 uint64_t thermalLevel = 0;
85 if (!strncmp(data, "thermal_level=", strlen("thermal_level="))) {
86 thermalLevel = strtoull(data + strlen("thermal_level="), NULL, 0);
87 }
88
89 if (thermalLevel >= MAX_THERMAL_LEVEL)
90 ctx->mThermalBurstMode = true;
91 else
92 ctx->mThermalBurstMode = false;
93}
94
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -040095struct event {
96 const char* name;
97 void (*callback)(hwc_context_t* ctx, int dpy, char *data);
98};
99
100struct event event_list[] = {
101 { "vsync_event", handle_vsync_event },
102 { "show_blank_event", handle_blank_event },
Dileep Kumar Reddia25a9182014-07-24 20:01:44 +0530103 { "msm_fb_thermal_level", handle_thermal_event },
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400104};
105
106#define num_events ARRAY_LENGTH(event_list)
107
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400108static void *vsync_loop(void *param)
109{
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400110 hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
111
Iliyan Malchev0f9c3972012-10-11 15:16:15 -0700112 char thread_name[64] = HWC_VSYNC_THREAD_NAME;
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400113 prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
114 setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY +
115 android::PRIORITY_MORE_FAVORABLE);
116
Naseer Ahmede13a6002013-07-11 13:43:18 -0400117 char vdata[MAX_DATA];
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400118 //Number of physical displays
119 //We poll on all the nodes.
120 int num_displays = HWC_NUM_DISPLAY_TYPES - 1;
121 struct pollfd pfd[num_displays][num_events];
Naseer Ahmede13a6002013-07-11 13:43:18 -0400122
Naseer Ahmedda10c142012-11-16 20:16:31 -0500123 char property[PROPERTY_VALUE_MAX];
124 if(property_get("debug.hwc.fakevsync", property, NULL) > 0) {
125 if(atoi(property) == 1)
Naseer Ahmed56601cd2013-03-05 11:34:14 -0500126 ctx->vstate.fakevsync = true;
127 }
128
129 if(property_get("debug.hwc.logvsync", property, 0) > 0) {
130 if(atoi(property) == 1)
131 logvsync = true;
Naseer Ahmedda10c142012-11-16 20:16:31 -0500132 }
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400133
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400134 char node_path[MAX_SYSFS_FILE_PATH];
Naseer Ahmed8fec5c32013-06-06 17:00:15 -0400135
Naseer Ahmede13a6002013-07-11 13:43:18 -0400136 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400137 for(size_t ev = 0; ev < num_events; ev++) {
138 snprintf(node_path, sizeof(node_path),
139 "/sys/class/graphics/fb%d/%s",
140 dpy == HWC_DISPLAY_PRIMARY ? 0 :
141 overlay::Overlay::getInstance()->
142 getFbForDpy(HWC_DISPLAY_EXTERNAL),
143 event_list[ev].name);
Naseer Ahmede13a6002013-07-11 13:43:18 -0400144
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400145 ALOGI("%s: Reading event %zu for dpy %d from %s", __FUNCTION__,
146 ev, dpy, node_path);
147 pfd[dpy][ev].fd = open(node_path, O_RDONLY);
148
149 if (dpy == HWC_DISPLAY_PRIMARY && pfd[dpy][ev].fd < 0) {
150 // Make sure fb device is opened before starting
151 // this thread so this never happens.
152 ALOGE ("%s:unable to open event node for dpy=%d event=%zu, %s",
153 __FUNCTION__, dpy, ev, strerror(errno));
154 if (ev == 0) {
155 ctx->vstate.fakevsync = true;
156 //XXX: Blank events don't work with fake vsync,
157 //but we shouldn't be running on fake vsync anyway.
158 break;
159 }
Naseer Ahmede13a6002013-07-11 13:43:18 -0400160 }
Naseer Ahmede13a6002013-07-11 13:43:18 -0400161
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400162 pread(pfd[dpy][ev].fd, vdata , MAX_DATA, 0);
163 if (pfd[dpy][ev].fd >= 0)
164 pfd[dpy][ev].events = POLLPRI | POLLERR;
165 }
Naseer Ahmed08212c02012-10-17 13:51:56 -0400166 }
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400167
Naseer Ahmede13a6002013-07-11 13:43:18 -0400168 if (LIKELY(!ctx->vstate.fakevsync)) {
169 do {
Shalaj Jaina70b4352014-06-15 13:47:47 -0700170 int err = poll(*pfd, (int)(num_displays * num_events), -1);
Naseer Ahmed8fec5c32013-06-06 17:00:15 -0400171 if(err > 0) {
Naseer Ahmede13a6002013-07-11 13:43:18 -0400172 for (int dpy = HWC_DISPLAY_PRIMARY; dpy < num_displays; dpy++) {
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400173 for(size_t ev = 0; ev < num_events; ev++) {
174 if (pfd[dpy][ev].revents & POLLPRI) {
Praveena Pachipulusud9443c72014-02-17 10:42:28 +0530175 ssize_t len = pread(pfd[dpy][ev].fd, vdata, MAX_DATA, 0);
176 if (UNLIKELY(len < 0)) {
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400177 // If the read was just interrupted - it is not
178 // a fatal error. Just continue in this case
179 ALOGE ("%s: Unable to read event:%zu for \
180 dpy=%d : %s",
181 __FUNCTION__, ev, dpy, strerror(errno));
182 continue;
183 }
184 event_list[ev].callback(ctx, dpy, vdata);
Naseer Ahmede13a6002013-07-11 13:43:18 -0400185 }
Naseer Ahmed8fec5c32013-06-06 17:00:15 -0400186 }
Naseer Ahmed8bb8f9d2013-05-11 07:29:45 -0400187 }
Naseer Ahmed8fec5c32013-06-06 17:00:15 -0400188 } else {
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400189 ALOGE("%s: poll failed errno: %s", __FUNCTION__,
Naseer Ahmede13a6002013-07-11 13:43:18 -0400190 strerror(errno));
Naseer Ahmed8bb8f9d2013-05-11 07:29:45 -0400191 continue;
Naseer Ahmedda10c142012-11-16 20:16:31 -0500192 }
Naseer Ahmede13a6002013-07-11 13:43:18 -0400193 } while (true);
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400194
Naseer Ahmede13a6002013-07-11 13:43:18 -0400195 } else {
196
197 //Fake vsync is used only when set explicitly through a property or when
198 //the vsync timestamp node cannot be opened at bootup. There is no
199 //fallback to fake vsync from the true vsync loop, ever, as the
200 //condition can easily escape detection.
201 //Also, fake vsync is delivered only for the primary display.
202 do {
203 usleep(16666);
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400204 uint64_t timestamp = systemTime();
205 ctx->proc->vsync(ctx->proc, HWC_DISPLAY_PRIMARY, timestamp);
Naseer Ahmede13a6002013-07-11 13:43:18 -0400206
207 } while (true);
208 }
209
210 for (int dpy = HWC_DISPLAY_PRIMARY; dpy <= HWC_DISPLAY_EXTERNAL; dpy++ ) {
Naseer Ahmed3fdb2eb2014-03-10 17:20:02 -0400211 for( size_t event = 0; event < num_events; event++) {
212 if(pfd[dpy][event].fd >= 0)
213 close (pfd[dpy][event].fd);
214 }
Naseer Ahmede13a6002013-07-11 13:43:18 -0400215 }
Iliyan Malcheveac89652012-10-04 10:38:28 -0700216
217 return NULL;
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400218}
219
220void init_vsync_thread(hwc_context_t* ctx)
221{
Iliyan Malchev0f9c3972012-10-11 15:16:15 -0700222 int ret;
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400223 pthread_t vsync_thread;
224 ALOGI("Initializing VSYNC Thread");
Iliyan Malchev0f9c3972012-10-11 15:16:15 -0700225 ret = pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx);
226 if (ret) {
227 ALOGE("%s: failed to create %s: %s", __FUNCTION__,
Naseer Ahmedda10c142012-11-16 20:16:31 -0500228 HWC_VSYNC_THREAD_NAME, strerror(ret));
Iliyan Malchev0f9c3972012-10-11 15:16:15 -0700229 }
Naseer Ahmedff4f0252012-10-01 13:03:01 -0400230}
231
232}; //namespace