1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19 #include <stdint.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <sys/types.h>
24 #include <math.h>
25
26 #include <utils/CallStack.h>
27 #include <utils/Errors.h>
28 #include <utils/misc.h>
29 #include <utils/String8.h>
30 #include <utils/Thread.h>
31 #include <utils/Trace.h>
32 #include <utils/Vector.h>
33
34 #include <ui/GraphicBuffer.h>
35
36 #include <hardware/hardware.h>
37 #include <hardware/hwcomposer.h>
38
39 #include <android/configuration.h>
40
41 #include <cutils/log.h>
42 #include <cutils/properties.h>
43
44 #include "HWComposer.h"
45
46 #include "../Layer.h" // needed only for debugging
47 #include "../SurfaceFlinger.h"
48
49 namespace android {
50
51 #define MIN_HWC_HEADER_VERSION HWC_HEADER_VERSION
52
hwcApiVersion(const hwc_composer_device_1_t * hwc)53 static uint32_t hwcApiVersion(const hwc_composer_device_1_t* hwc) {
54 uint32_t hwcVersion = hwc->common.version;
55 return hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK;
56 }
57
hwcHeaderVersion(const hwc_composer_device_1_t * hwc)58 static uint32_t hwcHeaderVersion(const hwc_composer_device_1_t* hwc) {
59 uint32_t hwcVersion = hwc->common.version;
60 return hwcVersion & HARDWARE_API_VERSION_2_HEADER_MASK;
61 }
62
hwcHasApiVersion(const hwc_composer_device_1_t * hwc,uint32_t version)63 static bool hwcHasApiVersion(const hwc_composer_device_1_t* hwc,
64 uint32_t version) {
65 return hwcApiVersion(hwc) >= (version & HARDWARE_API_VERSION_2_MAJ_MIN_MASK);
66 }
67
68 // ---------------------------------------------------------------------------
69
70 struct HWComposer::cb_context {
71 struct callbacks : public hwc_procs_t {
72 // these are here to facilitate the transition when adding
73 // new callbacks (an implementation can check for NULL before
74 // calling a new callback).
75 void (*zero[4])(void);
76 };
77 callbacks procs;
78 HWComposer* hwc;
79 };
80
81 // ---------------------------------------------------------------------------
82
HWComposer(const sp<SurfaceFlinger> & flinger,EventHandler & handler)83 HWComposer::HWComposer(
84 const sp<SurfaceFlinger>& flinger,
85 EventHandler& handler)
86 : mFlinger(flinger),
87 mFbDev(0), mHwc(0), mNumDisplays(1),
88 mCBContext(new cb_context),
89 mEventHandler(handler),
90 mDebugForceFakeVSync(false)
91 {
92 for (size_t i =0 ; i<MAX_HWC_DISPLAYS ; i++) {
93 mLists[i] = 0;
94 }
95
96 for (size_t i=0 ; i<HWC_NUM_PHYSICAL_DISPLAY_TYPES ; i++) {
97 mLastHwVSync[i] = 0;
98 mVSyncCounts[i] = 0;
99 }
100
101 char value[PROPERTY_VALUE_MAX];
102 property_get("debug.sf.no_hw_vsync", value, "0");
103 mDebugForceFakeVSync = atoi(value);
104
105 bool needVSyncThread = true;
106
107 // Note: some devices may insist that the FB HAL be opened before HWC.
108 int fberr = loadFbHalModule();
109 loadHwcModule();
110
111 if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
112 // close FB HAL if we don't needed it.
113 // FIXME: this is temporary until we're not forced to open FB HAL
114 // before HWC.
115 framebuffer_close(mFbDev);
116 mFbDev = NULL;
117 }
118
119 // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
120 if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
121 && !mFbDev) {
122 ALOGE("ERROR: failed to open framebuffer (%s), aborting",
123 strerror(-fberr));
124 abort();
125 }
126
127 // these display IDs are always reserved
128 for (size_t i=0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
129 mAllocatedDisplayIDs.markBit(i);
130 }
131
132 if (mHwc) {
133 ALOGI("Using %s version %u.%u", HWC_HARDWARE_COMPOSER,
134 (hwcApiVersion(mHwc) >> 24) & 0xff,
135 (hwcApiVersion(mHwc) >> 16) & 0xff);
136 if (mHwc->registerProcs) {
137 mCBContext->hwc = this;
138 mCBContext->procs.invalidate = &hook_invalidate;
139 mCBContext->procs.vsync = &hook_vsync;
140 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
141 mCBContext->procs.hotplug = &hook_hotplug;
142 else
143 mCBContext->procs.hotplug = NULL;
144 memset(mCBContext->procs.zero, 0, sizeof(mCBContext->procs.zero));
145 mHwc->registerProcs(mHwc, &mCBContext->procs);
146 }
147
148 // don't need a vsync thread if we have a hardware composer
149 needVSyncThread = false;
150 // always turn vsync off when we start
151 eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
152
153 // the number of displays we actually have depends on the
154 // hw composer version
155 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
156 // 1.3 adds support for virtual displays
157 mNumDisplays = MAX_HWC_DISPLAYS;
158 } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
159 // 1.1 adds support for multiple displays
160 mNumDisplays = NUM_BUILTIN_DISPLAYS;
161 } else {
162 mNumDisplays = 1;
163 }
164 }
165
166 if (mFbDev) {
167 ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
168 "should only have fbdev if no hwc or hwc is 1.0");
169
170 DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
171 disp.connected = true;
172 disp.width = mFbDev->width;
173 disp.height = mFbDev->height;
174 disp.format = mFbDev->format;
175 disp.xdpi = mFbDev->xdpi;
176 disp.ydpi = mFbDev->ydpi;
177 if (disp.refresh == 0) {
178 disp.refresh = nsecs_t(1e9 / mFbDev->fps);
179 ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
180 }
181 if (disp.refresh == 0) {
182 disp.refresh = nsecs_t(1e9 / 60.0);
183 ALOGW("getting VSYNC period from thin air: %lld",
184 mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
185 }
186 } else if (mHwc) {
187 // here we're guaranteed to have at least HWC 1.1
188 for (size_t i =0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
189 queryDisplayProperties(i);
190 }
191 }
192
193 if (needVSyncThread) {
194 // we don't have VSYNC support, we need to fake it
195 mVSyncThread = new VSyncThread(*this);
196 }
197 }
198
~HWComposer()199 HWComposer::~HWComposer() {
200 if (mHwc) {
201 eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
202 }
203 if (mVSyncThread != NULL) {
204 mVSyncThread->requestExitAndWait();
205 }
206 if (mHwc) {
207 hwc_close_1(mHwc);
208 }
209 if (mFbDev) {
210 framebuffer_close(mFbDev);
211 }
212 delete mCBContext;
213 }
214
215 // Load and prepare the hardware composer module. Sets mHwc.
loadHwcModule()216 void HWComposer::loadHwcModule()
217 {
218 hw_module_t const* module;
219
220 if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
221 ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
222 return;
223 }
224
225 int err = hwc_open_1(module, &mHwc);
226 if (err) {
227 ALOGE("%s device failed to initialize (%s)",
228 HWC_HARDWARE_COMPOSER, strerror(-err));
229 return;
230 }
231
232 if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
233 hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
234 hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
235 ALOGE("%s device version %#x unsupported, will not be used",
236 HWC_HARDWARE_COMPOSER, mHwc->common.version);
237 hwc_close_1(mHwc);
238 mHwc = NULL;
239 return;
240 }
241 }
242
243 // Load and prepare the FB HAL, which uses the gralloc module. Sets mFbDev.
loadFbHalModule()244 int HWComposer::loadFbHalModule()
245 {
246 hw_module_t const* module;
247
248 int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
249 if (err != 0) {
250 ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
251 return err;
252 }
253
254 return framebuffer_open(module, &mFbDev);
255 }
256
initCheck() const257 status_t HWComposer::initCheck() const {
258 return mHwc ? NO_ERROR : NO_INIT;
259 }
260
hook_invalidate(const struct hwc_procs * procs)261 void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
262 cb_context* ctx = reinterpret_cast<cb_context*>(
263 const_cast<hwc_procs_t*>(procs));
264 ctx->hwc->invalidate();
265 }
266
hook_vsync(const struct hwc_procs * procs,int disp,int64_t timestamp)267 void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
268 int64_t timestamp) {
269 cb_context* ctx = reinterpret_cast<cb_context*>(
270 const_cast<hwc_procs_t*>(procs));
271 ctx->hwc->vsync(disp, timestamp);
272 }
273
hook_hotplug(const struct hwc_procs * procs,int disp,int connected)274 void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
275 int connected) {
276 cb_context* ctx = reinterpret_cast<cb_context*>(
277 const_cast<hwc_procs_t*>(procs));
278 ctx->hwc->hotplug(disp, connected);
279 }
280
invalidate()281 void HWComposer::invalidate() {
282 mFlinger->repaintEverything();
283 }
284
vsync(int disp,int64_t timestamp)285 void HWComposer::vsync(int disp, int64_t timestamp) {
286 if (uint32_t(disp) < HWC_NUM_PHYSICAL_DISPLAY_TYPES) {
287 {
288 Mutex::Autolock _l(mLock);
289
290 // There have been reports of HWCs that signal several vsync events
291 // with the same timestamp when turning the display off and on. This
292 // is a bug in the HWC implementation, but filter the extra events
293 // out here so they don't cause havoc downstream.
294 if (timestamp == mLastHwVSync[disp]) {
295 ALOGW("Ignoring duplicate VSYNC event from HWC (t=%lld)",
296 timestamp);
297 return;
298 }
299
300 mLastHwVSync[disp] = timestamp;
301 }
302
303 char tag[16];
304 snprintf(tag, sizeof(tag), "HW_VSYNC_%1u", disp);
305 ATRACE_INT(tag, ++mVSyncCounts[disp] & 1);
306
307 mEventHandler.onVSyncReceived(disp, timestamp);
308 }
309 }
310
hotplug(int disp,int connected)311 void HWComposer::hotplug(int disp, int connected) {
312 if (disp == HWC_DISPLAY_PRIMARY || disp >= VIRTUAL_DISPLAY_ID_BASE) {
313 ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
314 disp, connected);
315 return;
316 }
317 queryDisplayProperties(disp);
318 mEventHandler.onHotplugReceived(disp, bool(connected));
319 }
320
getDefaultDensity(uint32_t height)321 static float getDefaultDensity(uint32_t height) {
322 if (height >= 1080) return ACONFIGURATION_DENSITY_XHIGH;
323 else return ACONFIGURATION_DENSITY_TV;
324 }
325
326 static const uint32_t DISPLAY_ATTRIBUTES[] = {
327 HWC_DISPLAY_VSYNC_PERIOD,
328 HWC_DISPLAY_WIDTH,
329 HWC_DISPLAY_HEIGHT,
330 HWC_DISPLAY_DPI_X,
331 HWC_DISPLAY_DPI_Y,
332 HWC_DISPLAY_NO_ATTRIBUTE,
333 };
334 #define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
335
queryDisplayProperties(int disp)336 status_t HWComposer::queryDisplayProperties(int disp) {
337
338 LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
339
340 // use zero as default value for unspecified attributes
341 int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
342 memset(values, 0, sizeof(values));
343
344 uint32_t config;
345 size_t numConfigs = 1;
346 status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
347 if (err != NO_ERROR) {
348 // this can happen if an unpluggable display is not connected
349 mDisplayData[disp].connected = false;
350 return err;
351 }
352
353 err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
354 if (err != NO_ERROR) {
355 // we can't get this display's info. turn it off.
356 mDisplayData[disp].connected = false;
357 return err;
358 }
359
360 int32_t w = 0, h = 0;
361 for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
362 switch (DISPLAY_ATTRIBUTES[i]) {
363 case HWC_DISPLAY_VSYNC_PERIOD:
364 mDisplayData[disp].refresh = nsecs_t(values[i]);
365 break;
366 case HWC_DISPLAY_WIDTH:
367 mDisplayData[disp].width = values[i];
368 break;
369 case HWC_DISPLAY_HEIGHT:
370 mDisplayData[disp].height = values[i];
371 break;
372 case HWC_DISPLAY_DPI_X:
373 mDisplayData[disp].xdpi = values[i] / 1000.0f;
374 break;
375 case HWC_DISPLAY_DPI_Y:
376 mDisplayData[disp].ydpi = values[i] / 1000.0f;
377 break;
378 default:
379 ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
380 i, DISPLAY_ATTRIBUTES[i]);
381 break;
382 }
383 }
384
385 // FIXME: what should we set the format to?
386 mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
387 mDisplayData[disp].connected = true;
388 if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
389 float dpi = getDefaultDensity(h);
390 mDisplayData[disp].xdpi = dpi;
391 mDisplayData[disp].ydpi = dpi;
392 }
393 return NO_ERROR;
394 }
395
setVirtualDisplayProperties(int32_t id,uint32_t w,uint32_t h,uint32_t format)396 status_t HWComposer::setVirtualDisplayProperties(int32_t id,
397 uint32_t w, uint32_t h, uint32_t format) {
398 if (id < VIRTUAL_DISPLAY_ID_BASE || id >= int32_t(mNumDisplays) ||
399 !mAllocatedDisplayIDs.hasBit(id)) {
400 return BAD_INDEX;
401 }
402 mDisplayData[id].width = w;
403 mDisplayData[id].height = h;
404 mDisplayData[id].format = format;
405 mDisplayData[id].xdpi = mDisplayData[id].ydpi = getDefaultDensity(h);
406 return NO_ERROR;
407 }
408
allocateDisplayId()409 int32_t HWComposer::allocateDisplayId() {
410 if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
411 return NO_MEMORY;
412 }
413 int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
414 mAllocatedDisplayIDs.markBit(id);
415 mDisplayData[id].connected = true;
416 return id;
417 }
418
freeDisplayId(int32_t id)419 status_t HWComposer::freeDisplayId(int32_t id) {
420 if (id < NUM_BUILTIN_DISPLAYS) {
421 // cannot free the reserved IDs
422 return BAD_VALUE;
423 }
424 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
425 return BAD_INDEX;
426 }
427 mAllocatedDisplayIDs.clearBit(id);
428 mDisplayData[id].connected = false;
429 return NO_ERROR;
430 }
431
getRefreshPeriod(int disp) const432 nsecs_t HWComposer::getRefreshPeriod(int disp) const {
433 return mDisplayData[disp].refresh;
434 }
435
getRefreshTimestamp(int disp) const436 nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
437 // this returns the last refresh timestamp.
438 // if the last one is not available, we estimate it based on
439 // the refresh period and whatever closest timestamp we have.
440 Mutex::Autolock _l(mLock);
441 nsecs_t now = systemTime(CLOCK_MONOTONIC);
442 return now - ((now - mLastHwVSync[disp]) % mDisplayData[disp].refresh);
443 }
444
getDisplayFence(int disp) const445 sp<Fence> HWComposer::getDisplayFence(int disp) const {
446 return mDisplayData[disp].lastDisplayFence;
447 }
448
getWidth(int disp) const449 uint32_t HWComposer::getWidth(int disp) const {
450 return mDisplayData[disp].width;
451 }
452
getHeight(int disp) const453 uint32_t HWComposer::getHeight(int disp) const {
454 return mDisplayData[disp].height;
455 }
456
getFormat(int disp) const457 uint32_t HWComposer::getFormat(int disp) const {
458 return mDisplayData[disp].format;
459 }
460
getDpiX(int disp) const461 float HWComposer::getDpiX(int disp) const {
462 return mDisplayData[disp].xdpi;
463 }
464
getDpiY(int disp) const465 float HWComposer::getDpiY(int disp) const {
466 return mDisplayData[disp].ydpi;
467 }
468
isConnected(int disp) const469 bool HWComposer::isConnected(int disp) const {
470 return mDisplayData[disp].connected;
471 }
472
eventControl(int disp,int event,int enabled)473 void HWComposer::eventControl(int disp, int event, int enabled) {
474 if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
475 ALOGD("eventControl ignoring event %d on unallocated disp %d (en=%d)",
476 event, disp, enabled);
477 return;
478 }
479 if (event != EVENT_VSYNC) {
480 ALOGW("eventControl got unexpected event %d (disp=%d en=%d)",
481 event, disp, enabled);
482 return;
483 }
484 status_t err = NO_ERROR;
485 if (mHwc && !mDebugForceFakeVSync) {
486 // NOTE: we use our own internal lock here because we have to call
487 // into the HWC with the lock held, and we want to make sure
488 // that even if HWC blocks (which it shouldn't), it won't
489 // affect other threads.
490 Mutex::Autolock _l(mEventControlLock);
491 const int32_t eventBit = 1UL << event;
492 const int32_t newValue = enabled ? eventBit : 0;
493 const int32_t oldValue = mDisplayData[disp].events & eventBit;
494 if (newValue != oldValue) {
495 ATRACE_CALL();
496 err = mHwc->eventControl(mHwc, disp, event, enabled);
497 if (!err) {
498 int32_t& events(mDisplayData[disp].events);
499 events = (events & ~eventBit) | newValue;
500 }
501 }
502 // error here should not happen -- not sure what we should
503 // do if it does.
504 ALOGE_IF(err, "eventControl(%d, %d) failed %s",
505 event, enabled, strerror(-err));
506 }
507
508 if (err == NO_ERROR && mVSyncThread != NULL) {
509 mVSyncThread->setEnabled(enabled);
510 }
511 }
512
createWorkList(int32_t id,size_t numLayers)513 status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
514 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
515 return BAD_INDEX;
516 }
517
518 if (mHwc) {
519 DisplayData& disp(mDisplayData[id]);
520 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
521 // we need space for the HWC_FRAMEBUFFER_TARGET
522 numLayers++;
523 }
524 if (disp.capacity < numLayers || disp.list == NULL) {
525 size_t size = sizeof(hwc_display_contents_1_t)
526 + numLayers * sizeof(hwc_layer_1_t);
527 free(disp.list);
528 disp.list = (hwc_display_contents_1_t*)malloc(size);
529 disp.capacity = numLayers;
530 }
531 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
532 disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
533 memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
534 const hwc_rect_t r = { 0, 0, (int) disp.width, (int) disp.height };
535 disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
536 disp.framebufferTarget->hints = 0;
537 disp.framebufferTarget->flags = 0;
538 disp.framebufferTarget->handle = disp.fbTargetHandle;
539 disp.framebufferTarget->transform = 0;
540 disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
541 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
542 disp.framebufferTarget->sourceCropf.left = 0;
543 disp.framebufferTarget->sourceCropf.top = 0;
544 disp.framebufferTarget->sourceCropf.right = disp.width;
545 disp.framebufferTarget->sourceCropf.bottom = disp.height;
546 } else {
547 disp.framebufferTarget->sourceCrop = r;
548 }
549 disp.framebufferTarget->displayFrame = r;
550 disp.framebufferTarget->visibleRegionScreen.numRects = 1;
551 disp.framebufferTarget->visibleRegionScreen.rects =
552 &disp.framebufferTarget->displayFrame;
553 disp.framebufferTarget->acquireFenceFd = -1;
554 disp.framebufferTarget->releaseFenceFd = -1;
555 disp.framebufferTarget->planeAlpha = 0xFF;
556 }
557 disp.list->retireFenceFd = -1;
558 disp.list->flags = HWC_GEOMETRY_CHANGED;
559 disp.list->numHwLayers = numLayers;
560 }
561 return NO_ERROR;
562 }
563
setFramebufferTarget(int32_t id,const sp<Fence> & acquireFence,const sp<GraphicBuffer> & buf)564 status_t HWComposer::setFramebufferTarget(int32_t id,
565 const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
566 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
567 return BAD_INDEX;
568 }
569 DisplayData& disp(mDisplayData[id]);
570 if (!disp.framebufferTarget) {
571 // this should never happen, but apparently eglCreateWindowSurface()
572 // triggers a Surface::queueBuffer() on some
573 // devices (!?) -- log and ignore.
574 ALOGE("HWComposer: framebufferTarget is null");
575 return NO_ERROR;
576 }
577
578 int acquireFenceFd = -1;
579 if (acquireFence->isValid()) {
580 acquireFenceFd = acquireFence->dup();
581 }
582
583 // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
584 disp.fbTargetHandle = buf->handle;
585 disp.framebufferTarget->handle = disp.fbTargetHandle;
586 disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
587 return NO_ERROR;
588 }
589
prepare()590 status_t HWComposer::prepare() {
591 for (size_t i=0 ; i<mNumDisplays ; i++) {
592 DisplayData& disp(mDisplayData[i]);
593 if (disp.framebufferTarget) {
594 // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
595 // DO NOT reset the handle field to NULL, because it's possible
596 // that we have nothing to redraw (eg: eglSwapBuffers() not called)
597 // in which case, we should continue to use the same buffer.
598 LOG_FATAL_IF(disp.list == NULL);
599 disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
600 }
601 if (!disp.connected && disp.list != NULL) {
602 ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
603 i, disp.list->numHwLayers);
604 }
605 mLists[i] = disp.list;
606 if (mLists[i]) {
607 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
608 mLists[i]->outbuf = disp.outbufHandle;
609 mLists[i]->outbufAcquireFenceFd = -1;
610 } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
611 // garbage data to catch improper use
612 mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
613 mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
614 } else {
615 mLists[i]->dpy = EGL_NO_DISPLAY;
616 mLists[i]->sur = EGL_NO_SURFACE;
617 }
618 }
619 }
620
621 int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
622 ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
623
624 if (err == NO_ERROR) {
625 // here we're just making sure that "skip" layers are set
626 // to HWC_FRAMEBUFFER and we're also counting how many layers
627 // we have of each type.
628 //
629 // If there are no window layers, we treat the display has having FB
630 // composition, because SurfaceFlinger will use GLES to draw the
631 // wormhole region.
632 for (size_t i=0 ; i<mNumDisplays ; i++) {
633 DisplayData& disp(mDisplayData[i]);
634 disp.hasFbComp = false;
635 disp.hasOvComp = false;
636 if (disp.list) {
637 for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
638 hwc_layer_1_t& l = disp.list->hwLayers[i];
639
640 //ALOGD("prepare: %d, type=%d, handle=%p",
641 // i, l.compositionType, l.handle);
642
643 if (l.flags & HWC_SKIP_LAYER) {
644 l.compositionType = HWC_FRAMEBUFFER;
645 }
646 if (l.compositionType == HWC_FRAMEBUFFER) {
647 disp.hasFbComp = true;
648 }
649 if (l.compositionType == HWC_OVERLAY) {
650 disp.hasOvComp = true;
651 }
652 }
653 if (disp.list->numHwLayers == (disp.framebufferTarget ? 1 : 0)) {
654 disp.hasFbComp = true;
655 }
656 } else {
657 disp.hasFbComp = true;
658 }
659 }
660 }
661 return (status_t)err;
662 }
663
hasHwcComposition(int32_t id) const664 bool HWComposer::hasHwcComposition(int32_t id) const {
665 if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
666 return false;
667 return mDisplayData[id].hasOvComp;
668 }
669
hasGlesComposition(int32_t id) const670 bool HWComposer::hasGlesComposition(int32_t id) const {
671 if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
672 return true;
673 return mDisplayData[id].hasFbComp;
674 }
675
getAndResetReleaseFence(int32_t id)676 sp<Fence> HWComposer::getAndResetReleaseFence(int32_t id) {
677 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
678 return Fence::NO_FENCE;
679
680 int fd = INVALID_OPERATION;
681 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
682 const DisplayData& disp(mDisplayData[id]);
683 if (disp.framebufferTarget) {
684 fd = disp.framebufferTarget->releaseFenceFd;
685 disp.framebufferTarget->acquireFenceFd = -1;
686 disp.framebufferTarget->releaseFenceFd = -1;
687 }
688 }
689 return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
690 }
691
commit()692 status_t HWComposer::commit() {
693 int err = NO_ERROR;
694 if (mHwc) {
695 if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
696 // On version 1.0, the OpenGL ES target surface is communicated
697 // by the (dpy, sur) fields and we are guaranteed to have only
698 // a single display.
699 mLists[0]->dpy = eglGetCurrentDisplay();
700 mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
701 }
702
703 for (size_t i=VIRTUAL_DISPLAY_ID_BASE; i<mNumDisplays; i++) {
704 DisplayData& disp(mDisplayData[i]);
705 if (disp.outbufHandle) {
706 mLists[i]->outbuf = disp.outbufHandle;
707 mLists[i]->outbufAcquireFenceFd =
708 disp.outbufAcquireFence->dup();
709 }
710 }
711
712 err = mHwc->set(mHwc, mNumDisplays, mLists);
713
714 for (size_t i=0 ; i<mNumDisplays ; i++) {
715 DisplayData& disp(mDisplayData[i]);
716 disp.lastDisplayFence = disp.lastRetireFence;
717 disp.lastRetireFence = Fence::NO_FENCE;
718 if (disp.list) {
719 if (disp.list->retireFenceFd != -1) {
720 disp.lastRetireFence = new Fence(disp.list->retireFenceFd);
721 disp.list->retireFenceFd = -1;
722 }
723 disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
724 }
725 }
726 }
727 return (status_t)err;
728 }
729
release(int disp)730 status_t HWComposer::release(int disp) {
731 LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
732 if (mHwc) {
733 eventControl(disp, HWC_EVENT_VSYNC, 0);
734 return (status_t)mHwc->blank(mHwc, disp, 1);
735 }
736 return NO_ERROR;
737 }
738
acquire(int disp)739 status_t HWComposer::acquire(int disp) {
740 LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
741 if (mHwc) {
742 return (status_t)mHwc->blank(mHwc, disp, 0);
743 }
744 return NO_ERROR;
745 }
746
disconnectDisplay(int disp)747 void HWComposer::disconnectDisplay(int disp) {
748 LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY);
749 DisplayData& dd(mDisplayData[disp]);
750 free(dd.list);
751 dd.list = NULL;
752 dd.framebufferTarget = NULL; // points into dd.list
753 dd.fbTargetHandle = NULL;
754 dd.outbufHandle = NULL;
755 dd.lastRetireFence = Fence::NO_FENCE;
756 dd.lastDisplayFence = Fence::NO_FENCE;
757 dd.outbufAcquireFence = Fence::NO_FENCE;
758 }
759
getVisualID() const760 int HWComposer::getVisualID() const {
761 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
762 // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
763 // is supported by the implementation. we can only be in this case
764 // if we have HWC 1.1
765 return HAL_PIXEL_FORMAT_RGBA_8888;
766 //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
767 } else {
768 return mFbDev->format;
769 }
770 }
771
supportsFramebufferTarget() const772 bool HWComposer::supportsFramebufferTarget() const {
773 return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
774 }
775
fbPost(int32_t id,const sp<Fence> & acquireFence,const sp<GraphicBuffer> & buffer)776 int HWComposer::fbPost(int32_t id,
777 const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
778 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
779 return setFramebufferTarget(id, acquireFence, buffer);
780 } else {
781 acquireFence->waitForever("HWComposer::fbPost");
782 return mFbDev->post(mFbDev, buffer->handle);
783 }
784 }
785
fbCompositionComplete()786 int HWComposer::fbCompositionComplete() {
787 if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
788 return NO_ERROR;
789
790 if (mFbDev->compositionComplete) {
791 return mFbDev->compositionComplete(mFbDev);
792 } else {
793 return INVALID_OPERATION;
794 }
795 }
796
fbDump(String8 & result)797 void HWComposer::fbDump(String8& result) {
798 if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
799 const size_t SIZE = 4096;
800 char buffer[SIZE];
801 mFbDev->dump(mFbDev, buffer, SIZE);
802 result.append(buffer);
803 }
804 }
805
setOutputBuffer(int32_t id,const sp<Fence> & acquireFence,const sp<GraphicBuffer> & buf)806 status_t HWComposer::setOutputBuffer(int32_t id, const sp<Fence>& acquireFence,
807 const sp<GraphicBuffer>& buf) {
808 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
809 return BAD_INDEX;
810 if (id < VIRTUAL_DISPLAY_ID_BASE)
811 return INVALID_OPERATION;
812
813 DisplayData& disp(mDisplayData[id]);
814 disp.outbufHandle = buf->handle;
815 disp.outbufAcquireFence = acquireFence;
816 return NO_ERROR;
817 }
818
getLastRetireFence(int32_t id)819 sp<Fence> HWComposer::getLastRetireFence(int32_t id) {
820 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
821 return Fence::NO_FENCE;
822 return mDisplayData[id].lastRetireFence;
823 }
824
825 /*
826 * Helper template to implement a concrete HWCLayer
827 * This holds the pointer to the concrete hwc layer type
828 * and implements the "iterable" side of HWCLayer.
829 */
830 template<typename CONCRETE, typename HWCTYPE>
831 class Iterable : public HWComposer::HWCLayer {
832 protected:
833 HWCTYPE* const mLayerList;
834 HWCTYPE* mCurrentLayer;
Iterable(HWCTYPE * layer)835 Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
getLayer() const836 inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
getLayer()837 inline HWCTYPE* getLayer() { return mCurrentLayer; }
~Iterable()838 virtual ~Iterable() { }
839 private:
840 // returns a copy of ourselves
dup()841 virtual HWComposer::HWCLayer* dup() {
842 return new CONCRETE( static_cast<const CONCRETE&>(*this) );
843 }
setLayer(size_t index)844 virtual status_t setLayer(size_t index) {
845 mCurrentLayer = &mLayerList[index];
846 return NO_ERROR;
847 }
848 };
849
850 /*
851 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
852 * This implements the HWCLayer side of HWCIterableLayer.
853 */
854 class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
855 struct hwc_composer_device_1* mHwc;
856 public:
HWCLayerVersion1(struct hwc_composer_device_1 * hwc,hwc_layer_1_t * layer)857 HWCLayerVersion1(struct hwc_composer_device_1* hwc, hwc_layer_1_t* layer)
858 : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer), mHwc(hwc) { }
859
getCompositionType() const860 virtual int32_t getCompositionType() const {
861 return getLayer()->compositionType;
862 }
getHints() const863 virtual uint32_t getHints() const {
864 return getLayer()->hints;
865 }
getAndResetReleaseFence()866 virtual sp<Fence> getAndResetReleaseFence() {
867 int fd = getLayer()->releaseFenceFd;
868 getLayer()->releaseFenceFd = -1;
869 return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
870 }
setAcquireFenceFd(int fenceFd)871 virtual void setAcquireFenceFd(int fenceFd) {
872 getLayer()->acquireFenceFd = fenceFd;
873 }
setPerFrameDefaultState()874 virtual void setPerFrameDefaultState() {
875 //getLayer()->compositionType = HWC_FRAMEBUFFER;
876 }
setPlaneAlpha(uint8_t alpha)877 virtual void setPlaneAlpha(uint8_t alpha) {
878 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
879 getLayer()->planeAlpha = alpha;
880 } else {
881 if (alpha < 0xFF) {
882 getLayer()->flags |= HWC_SKIP_LAYER;
883 }
884 }
885 }
setDefaultState()886 virtual void setDefaultState() {
887 hwc_layer_1_t* const l = getLayer();
888 l->compositionType = HWC_FRAMEBUFFER;
889 l->hints = 0;
890 l->flags = HWC_SKIP_LAYER;
891 l->handle = 0;
892 l->transform = 0;
893 l->blending = HWC_BLENDING_NONE;
894 l->visibleRegionScreen.numRects = 0;
895 l->visibleRegionScreen.rects = NULL;
896 l->acquireFenceFd = -1;
897 l->releaseFenceFd = -1;
898 l->planeAlpha = 0xFF;
899 }
setSkip(bool skip)900 virtual void setSkip(bool skip) {
901 if (skip) {
902 getLayer()->flags |= HWC_SKIP_LAYER;
903 } else {
904 getLayer()->flags &= ~HWC_SKIP_LAYER;
905 }
906 }
setBlending(uint32_t blending)907 virtual void setBlending(uint32_t blending) {
908 getLayer()->blending = blending;
909 }
setTransform(uint32_t transform)910 virtual void setTransform(uint32_t transform) {
911 getLayer()->transform = transform;
912 }
setFrame(const Rect & frame)913 virtual void setFrame(const Rect& frame) {
914 getLayer()->displayFrame = reinterpret_cast<hwc_rect_t const&>(frame);
915 }
setCrop(const FloatRect & crop)916 virtual void setCrop(const FloatRect& crop) {
917 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
918 getLayer()->sourceCropf = reinterpret_cast<hwc_frect_t const&>(crop);
919 } else {
920 /*
921 * Since h/w composer didn't support a flot crop rect before version 1.3,
922 * using integer coordinates instead produces a different output from the GL code in
923 * Layer::drawWithOpenGL(). The difference can be large if the buffer crop to
924 * window size ratio is large and a window crop is defined
925 * (i.e.: if we scale the buffer a lot and we also crop it with a window crop).
926 */
927 hwc_rect_t& r = getLayer()->sourceCrop;
928 r.left = int(ceilf(crop.left));
929 r.top = int(ceilf(crop.top));
930 r.right = int(floorf(crop.right));
931 r.bottom= int(floorf(crop.bottom));
932 }
933 }
setVisibleRegionScreen(const Region & reg)934 virtual void setVisibleRegionScreen(const Region& reg) {
935 // Region::getSharedBuffer creates a reference to the underlying
936 // SharedBuffer of this Region, this reference is freed
937 // in onDisplayed()
938 hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
939 SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
940 visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
941 }
setBuffer(const sp<GraphicBuffer> & buffer)942 virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
943 if (buffer == 0 || buffer->handle == 0) {
944 getLayer()->compositionType = HWC_FRAMEBUFFER;
945 getLayer()->flags |= HWC_SKIP_LAYER;
946 getLayer()->handle = 0;
947 } else {
948 getLayer()->handle = buffer->handle;
949 }
950 }
onDisplayed()951 virtual void onDisplayed() {
952 hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
953 SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
954 if (sb) {
955 sb->release();
956 // not technically needed but safer
957 visibleRegion.numRects = 0;
958 visibleRegion.rects = NULL;
959 }
960
961 getLayer()->acquireFenceFd = -1;
962 }
963 };
964
965 /*
966 * returns an iterator initialized at a given index in the layer list
967 */
getLayerIterator(int32_t id,size_t index)968 HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
969 if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
970 return LayerListIterator();
971 }
972 const DisplayData& disp(mDisplayData[id]);
973 if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
974 return LayerListIterator();
975 }
976 return LayerListIterator(new HWCLayerVersion1(mHwc, disp.list->hwLayers), index);
977 }
978
979 /*
980 * returns an iterator on the beginning of the layer list
981 */
begin(int32_t id)982 HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
983 return getLayerIterator(id, 0);
984 }
985
986 /*
987 * returns an iterator on the end of the layer list
988 */
end(int32_t id)989 HWComposer::LayerListIterator HWComposer::end(int32_t id) {
990 size_t numLayers = 0;
991 if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
992 const DisplayData& disp(mDisplayData[id]);
993 if (mHwc && disp.list) {
994 numLayers = disp.list->numHwLayers;
995 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
996 // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
997 // which we ignore when iterating through the layer list.
998 ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
999 if (numLayers) {
1000 numLayers--;
1001 }
1002 }
1003 }
1004 }
1005 return getLayerIterator(id, numLayers);
1006 }
1007
dump(String8 & result) const1008 void HWComposer::dump(String8& result) const {
1009 if (mHwc) {
1010 result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
1011 result.appendFormat(" mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
1012 for (size_t i=0 ; i<mNumDisplays ; i++) {
1013 const DisplayData& disp(mDisplayData[i]);
1014 if (!disp.connected)
1015 continue;
1016
1017 const Vector< sp<Layer> >& visibleLayersSortedByZ =
1018 mFlinger->getLayerSortedByZForHwcDisplay(i);
1019
1020 result.appendFormat(
1021 " Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
1022 i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
1023
1024 if (disp.list) {
1025 result.appendFormat(
1026 " numHwLayers=%u, flags=%08x\n",
1027 disp.list->numHwLayers, disp.list->flags);
1028
1029 result.append(
1030 " type | handle | hints | flags | tr | blend | format | source crop | frame name \n"
1031 "------------+----------+----------+----------+----+-------+----------+---------------------------------+--------------------------------\n");
1032 // " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____._,_____._,_____._,_____._] | [_____,_____,_____,_____]
1033 for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
1034 const hwc_layer_1_t&l = disp.list->hwLayers[i];
1035 int32_t format = -1;
1036 String8 name("unknown");
1037
1038 if (i < visibleLayersSortedByZ.size()) {
1039 const sp<Layer>& layer(visibleLayersSortedByZ[i]);
1040 const sp<GraphicBuffer>& buffer(
1041 layer->getActiveBuffer());
1042 if (buffer != NULL) {
1043 format = buffer->getPixelFormat();
1044 }
1045 name = layer->getName();
1046 }
1047
1048 int type = l.compositionType;
1049 if (type == HWC_FRAMEBUFFER_TARGET) {
1050 name = "HWC_FRAMEBUFFER_TARGET";
1051 format = disp.format;
1052 }
1053
1054 static char const* compositionTypeName[] = {
1055 "GLES",
1056 "HWC",
1057 "BACKGROUND",
1058 "FB TARGET",
1059 "UNKNOWN"};
1060 if (type >= NELEM(compositionTypeName))
1061 type = NELEM(compositionTypeName) - 1;
1062
1063 if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
1064 result.appendFormat(
1065 " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7.1f,%7.1f,%7.1f,%7.1f] | [%5d,%5d,%5d,%5d] %s\n",
1066 compositionTypeName[type],
1067 intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1068 l.sourceCropf.left, l.sourceCropf.top, l.sourceCropf.right, l.sourceCropf.bottom,
1069 l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1070 name.string());
1071 } else {
1072 result.appendFormat(
1073 " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7d,%7d,%7d,%7d] | [%5d,%5d,%5d,%5d] %s\n",
1074 compositionTypeName[type],
1075 intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1076 l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
1077 l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1078 name.string());
1079 }
1080 }
1081 }
1082 }
1083 }
1084
1085 if (mHwc && mHwc->dump) {
1086 const size_t SIZE = 4096;
1087 char buffer[SIZE];
1088 mHwc->dump(mHwc, buffer, SIZE);
1089 result.append(buffer);
1090 }
1091 }
1092
1093 // ---------------------------------------------------------------------------
1094
VSyncThread(HWComposer & hwc)1095 HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
1096 : mHwc(hwc), mEnabled(false),
1097 mNextFakeVSync(0),
1098 mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
1099 {
1100 }
1101
setEnabled(bool enabled)1102 void HWComposer::VSyncThread::setEnabled(bool enabled) {
1103 Mutex::Autolock _l(mLock);
1104 if (mEnabled != enabled) {
1105 mEnabled = enabled;
1106 mCondition.signal();
1107 }
1108 }
1109
onFirstRef()1110 void HWComposer::VSyncThread::onFirstRef() {
1111 run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
1112 }
1113
threadLoop()1114 bool HWComposer::VSyncThread::threadLoop() {
1115 { // scope for lock
1116 Mutex::Autolock _l(mLock);
1117 while (!mEnabled) {
1118 mCondition.wait(mLock);
1119 }
1120 }
1121
1122 const nsecs_t period = mRefreshPeriod;
1123 const nsecs_t now = systemTime(CLOCK_MONOTONIC);
1124 nsecs_t next_vsync = mNextFakeVSync;
1125 nsecs_t sleep = next_vsync - now;
1126 if (sleep < 0) {
1127 // we missed, find where the next vsync should be
1128 sleep = (period - ((now - next_vsync) % period));
1129 next_vsync = now + sleep;
1130 }
1131 mNextFakeVSync = next_vsync + period;
1132
1133 struct timespec spec;
1134 spec.tv_sec = next_vsync / 1000000000;
1135 spec.tv_nsec = next_vsync % 1000000000;
1136
1137 int err;
1138 do {
1139 err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1140 } while (err<0 && errno == EINTR);
1141
1142 if (err == 0) {
1143 mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1144 }
1145
1146 return true;
1147 }
1148
DisplayData()1149 HWComposer::DisplayData::DisplayData()
1150 : width(0), height(0), format(0),
1151 xdpi(0.0f), ydpi(0.0f),
1152 refresh(0),
1153 connected(false),
1154 hasFbComp(false), hasOvComp(false),
1155 capacity(0), list(NULL),
1156 framebufferTarget(NULL), fbTargetHandle(0),
1157 lastRetireFence(Fence::NO_FENCE), lastDisplayFence(Fence::NO_FENCE),
1158 outbufHandle(NULL), outbufAcquireFence(Fence::NO_FENCE),
1159 events(0)
1160 {}
1161
~DisplayData()1162 HWComposer::DisplayData::~DisplayData() {
1163 free(list);
1164 }
1165
1166 // ---------------------------------------------------------------------------
1167 }; // namespace android
1168