HWComposer.cpp revision d3d35f18345c3ef93217313a583ace473b5a47ad 
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// Uncomment this to remove support for HWC_DEVICE_API_VERSION_0_3 and older
20#define HWC_REMOVE_DEPRECATED_VERSIONS 1
21
22#include <stdint.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <sys/types.h>
27
28#include <utils/Errors.h>
29#include <utils/misc.h>
30#include <utils/String8.h>
31#include <utils/Thread.h>
32#include <utils/Trace.h>
33#include <utils/Vector.h>
34
35#include <ui/GraphicBuffer.h>
36
37#include <hardware/hardware.h>
38#include <hardware/hwcomposer.h>
39
40#include <cutils/log.h>
41#include <cutils/properties.h>
42
43#include "Layer.h"           // needed only for debugging
44#include "LayerBase.h"
45#include "HWComposer.h"
46#include "SurfaceFlinger.h"
47#include <utils/CallStack.h>
48
49namespace android {
50
51#define MIN_HWC_HEADER_VERSION 0
52
53static uint32_t hwcApiVersion(const hwc_composer_device_1_t* hwc) {
54    uint32_t hwcVersion = hwc->common.version;
55    if (MIN_HWC_HEADER_VERSION == 0 &&
56            (hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK) == 0) {
57        // legacy version encoding
58        hwcVersion <<= 16;
59    }
60    return hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK;
61}
62
63static uint32_t hwcHeaderVersion(const hwc_composer_device_1_t* hwc) {
64    uint32_t hwcVersion = hwc->common.version;
65    if (MIN_HWC_HEADER_VERSION == 0 &&
66            (hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK) == 0) {
67        // legacy version encoding
68        hwcVersion <<= 16;
69    }
70    return hwcVersion & HARDWARE_API_VERSION_2_HEADER_MASK;
71}
72
73static bool hwcHasApiVersion(const hwc_composer_device_1_t* hwc,
74        uint32_t version) {
75    return hwcApiVersion(hwc) >= (version & HARDWARE_API_VERSION_2_MAJ_MIN_MASK);
76}
77
78// ---------------------------------------------------------------------------
79
80struct HWComposer::cb_context {
81    struct callbacks : public hwc_procs_t {
82        // these are here to facilitate the transition when adding
83        // new callbacks (an implementation can check for NULL before
84        // calling a new callback).
85        void (*zero[4])(void);
86    };
87    callbacks procs;
88    HWComposer* hwc;
89};
90
91// ---------------------------------------------------------------------------
92
93HWComposer::HWComposer(
94        const sp<SurfaceFlinger>& flinger,
95        EventHandler& handler)
96    : mFlinger(flinger),
97      mFbDev(0), mHwc(0), mNumDisplays(1),
98      mCBContext(new cb_context),
99      mEventHandler(handler),
100      mVSyncCount(0), mDebugForceFakeVSync(false)
101{
102    for (size_t i =0 ; i<MAX_DISPLAYS ; i++) {
103        mLists[i] = 0;
104    }
105
106    char value[PROPERTY_VALUE_MAX];
107    property_get("debug.sf.no_hw_vsync", value, "0");
108    mDebugForceFakeVSync = atoi(value);
109
110    bool needVSyncThread = true;
111
112    // Note: some devices may insist that the FB HAL be opened before HWC.
113    loadFbHalModule();
114    loadHwcModule();
115
116    if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
117        // close FB HAL if we don't needed it.
118        // FIXME: this is temporary until we're not forced to open FB HAL
119        // before HWC.
120        framebuffer_close(mFbDev);
121        mFbDev = NULL;
122    }
123
124    // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
125    if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
126            && !mFbDev) {
127        ALOGE("ERROR: failed to open framebuffer, aborting");
128        abort();
129    }
130
131    if (mHwc) {
132        ALOGI("Using %s version %u.%u", HWC_HARDWARE_COMPOSER,
133              (hwcApiVersion(mHwc) >> 24) & 0xff,
134              (hwcApiVersion(mHwc) >> 16) & 0xff);
135        if (mHwc->registerProcs) {
136            mCBContext->hwc = this;
137            mCBContext->procs.invalidate = &hook_invalidate;
138            mCBContext->procs.vsync = &hook_vsync;
139            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
140                mCBContext->procs.hotplug = &hook_hotplug;
141            else
142                mCBContext->procs.hotplug = NULL;
143            memset(mCBContext->procs.zero, 0, sizeof(mCBContext->procs.zero));
144            mHwc->registerProcs(mHwc, &mCBContext->procs);
145        }
146
147        // don't need a vsync thread if we have a hardware composer
148        needVSyncThread = false;
149        // always turn vsync off when we start
150        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
151
152        // these IDs are always reserved
153        for (size_t i=0 ; i<HWC_NUM_DISPLAY_TYPES ; i++) {
154            mAllocatedDisplayIDs.markBit(i);
155        }
156
157        // the number of displays we actually have depends on the
158        // hw composer version
159        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
160            // 1.2 adds support for virtual displays
161            mNumDisplays = MAX_DISPLAYS;
162        } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
163            // 1.1 adds support for multiple displays
164            mNumDisplays = HWC_NUM_DISPLAY_TYPES;
165        } else {
166            mNumDisplays = 1;
167        }
168    }
169
170    if (mFbDev) {
171        ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
172                "should only have fbdev if no hwc or hwc is 1.0");
173
174        DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
175        disp.width = mFbDev->width;
176        disp.height = mFbDev->height;
177        disp.format = mFbDev->format;
178        disp.xdpi = mFbDev->xdpi;
179        disp.ydpi = mFbDev->ydpi;
180        if (disp.refresh == 0) {
181            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
182            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
183        }
184        if (disp.refresh == 0) {
185            disp.refresh = nsecs_t(1e9 / 60.0);
186            ALOGW("getting VSYNC period from thin air: %lld",
187                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
188        }
189    } else if (mHwc) {
190        queryDisplayProperties(HWC_DISPLAY_PRIMARY);
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
199HWComposer::~HWComposer() {
200    if (mHwc) {
201        mHwc->eventControl(mHwc, 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.
216void 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.
244void HWComposer::loadFbHalModule()
245{
246    hw_module_t const* module;
247
248    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) != 0) {
249        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
250        return;
251    }
252
253    int err = framebuffer_open(module, &mFbDev);
254    if (err) {
255        ALOGE("framebuffer_open failed (%s)", strerror(-err));
256        return;
257    }
258}
259
260status_t HWComposer::initCheck() const {
261    return mHwc ? NO_ERROR : NO_INIT;
262}
263
264void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
265    cb_context* ctx = reinterpret_cast<cb_context*>(
266            const_cast<hwc_procs_t*>(procs));
267    ctx->hwc->invalidate();
268}
269
270void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
271        int64_t timestamp) {
272    cb_context* ctx = reinterpret_cast<cb_context*>(
273            const_cast<hwc_procs_t*>(procs));
274    ctx->hwc->vsync(disp, timestamp);
275}
276
277void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
278        int connected) {
279    cb_context* ctx = reinterpret_cast<cb_context*>(
280            const_cast<hwc_procs_t*>(procs));
281    ctx->hwc->hotplug(disp, connected);
282}
283
284void HWComposer::invalidate() {
285    mFlinger->repaintEverything();
286}
287
288void HWComposer::vsync(int disp, int64_t timestamp) {
289    ATRACE_INT("VSYNC", ++mVSyncCount&1);
290    mEventHandler.onVSyncReceived(disp, timestamp);
291    Mutex::Autolock _l(mLock);
292    mLastHwVSync = timestamp;
293}
294
295void HWComposer::hotplug(int disp, int connected) {
296    if (disp == HWC_DISPLAY_PRIMARY || disp >= HWC_NUM_DISPLAY_TYPES) {
297        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
298                disp, connected);
299        return;
300    }
301
302    if (connected)
303        queryDisplayProperties(disp);
304
305    // TODO: tell someone else about this
306}
307
308static const uint32_t DISPLAY_ATTRIBUTES[] = {
309    HWC_DISPLAY_VSYNC_PERIOD,
310    HWC_DISPLAY_WIDTH,
311    HWC_DISPLAY_HEIGHT,
312    HWC_DISPLAY_DPI_X,
313    HWC_DISPLAY_DPI_Y,
314    HWC_DISPLAY_NO_ATTRIBUTE,
315};
316#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
317
318// http://developer.android.com/reference/android/util/DisplayMetrics.html
319#define ANDROID_DENSITY_TV    213
320#define ANDROID_DENSITY_XHIGH 320
321
322void HWComposer::queryDisplayProperties(int disp) {
323    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
324
325    // use zero as default value for unspecified attributes
326    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
327    memset(values, 0, sizeof(values));
328
329    uint32_t config;
330    size_t numConfigs = 1;
331    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
332    LOG_ALWAYS_FATAL_IF(err, "getDisplayAttributes failed (%s)", strerror(-err));
333
334    if (err == NO_ERROR) {
335        ALOGD("config=%d, numConfigs=%d, NUM_DISPLAY_ATTRIBUTES=%d",
336                config, numConfigs, NUM_DISPLAY_ATTRIBUTES);
337        mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES,
338                values);
339    }
340
341    int32_t w = 0, h = 0;
342    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
343        switch (DISPLAY_ATTRIBUTES[i]) {
344        case HWC_DISPLAY_VSYNC_PERIOD:
345            mDisplayData[disp].refresh = nsecs_t(values[i]);
346            break;
347        case HWC_DISPLAY_WIDTH:
348            mDisplayData[disp].width = values[i];
349            break;
350        case HWC_DISPLAY_HEIGHT:
351            mDisplayData[disp].height = values[i];
352            break;
353        case HWC_DISPLAY_DPI_X:
354            mDisplayData[disp].xdpi = values[i] / 1000.0f;
355            break;
356        case HWC_DISPLAY_DPI_Y:
357            mDisplayData[disp].ydpi = values[i] / 1000.0f;
358            break;
359        default:
360            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
361                    i, DISPLAY_ATTRIBUTES[i]);
362            break;
363        }
364    }
365
366    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
367        // is there anything smarter we can do?
368        if (h >= 1080) {
369            mDisplayData[disp].xdpi = ANDROID_DENSITY_XHIGH;
370            mDisplayData[disp].ydpi = ANDROID_DENSITY_XHIGH;
371        } else {
372            mDisplayData[disp].xdpi = ANDROID_DENSITY_TV;
373            mDisplayData[disp].ydpi = ANDROID_DENSITY_TV;
374        }
375    }
376}
377
378int32_t HWComposer::allocateDisplayId() {
379    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
380        return NO_MEMORY;
381    }
382    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
383    mAllocatedDisplayIDs.markBit(id);
384    return id;
385}
386
387status_t HWComposer::freeDisplayId(int32_t id) {
388    if (id < HWC_NUM_DISPLAY_TYPES) {
389        // cannot free the reserved IDs
390        return BAD_VALUE;
391    }
392    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
393        return BAD_INDEX;
394    }
395    mAllocatedDisplayIDs.clearBit(id);
396    return NO_ERROR;
397}
398
399nsecs_t HWComposer::getRefreshPeriod(int disp) const {
400    return mDisplayData[disp].refresh;
401}
402
403nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
404    // this returns the last refresh timestamp.
405    // if the last one is not available, we estimate it based on
406    // the refresh period and whatever closest timestamp we have.
407    Mutex::Autolock _l(mLock);
408    nsecs_t now = systemTime(CLOCK_MONOTONIC);
409    return now - ((now - mLastHwVSync) %  mDisplayData[disp].refresh);
410}
411
412uint32_t HWComposer::getWidth(int disp) const {
413    return mDisplayData[disp].width;
414}
415
416uint32_t HWComposer::getHeight(int disp) const {
417    return mDisplayData[disp].height;
418}
419
420uint32_t HWComposer::getFormat(int disp) const {
421    return mDisplayData[disp].format;
422}
423
424float HWComposer::getDpiX(int disp) const {
425    return mDisplayData[disp].xdpi;
426}
427
428float HWComposer::getDpiY(int disp) const {
429    return mDisplayData[disp].ydpi;
430}
431
432void HWComposer::eventControl(int event, int enabled) {
433    status_t err = NO_ERROR;
434    if (mHwc) {
435        if (!mDebugForceFakeVSync) {
436            err = mHwc->eventControl(mHwc, 0, event, enabled);
437            // error here should not happen -- not sure what we should
438            // do if it does.
439            ALOGE_IF(err, "eventControl(%d, %d) failed %s",
440                    event, enabled, strerror(-err));
441        }
442    }
443
444    if (err == NO_ERROR && mVSyncThread != NULL) {
445        mVSyncThread->setEnabled(enabled);
446    }
447}
448
449status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
450    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
451        return BAD_INDEX;
452    }
453
454    if (mHwc) {
455        DisplayData& disp(mDisplayData[id]);
456        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
457            // we need space for the HWC_FRAMEBUFFER_TARGET
458            numLayers++;
459        }
460        if (disp.capacity < numLayers || disp.list == NULL) {
461            size_t size = sizeof(hwc_display_contents_1_t)
462                    + numLayers * sizeof(hwc_layer_1_t);
463            free(disp.list);
464            disp.list = (hwc_display_contents_1_t*)malloc(size);
465            disp.capacity = numLayers;
466        }
467        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
468            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
469            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
470            const hwc_rect_t r = { 0, 0, disp.width, disp.height };
471            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
472            disp.framebufferTarget->hints = 0;
473            disp.framebufferTarget->flags = 0;
474            disp.framebufferTarget->handle = disp.fbTargetHandle;
475            disp.framebufferTarget->transform = 0;
476            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
477            disp.framebufferTarget->sourceCrop = r;
478            disp.framebufferTarget->displayFrame = r;
479            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
480            disp.framebufferTarget->visibleRegionScreen.rects =
481                &disp.framebufferTarget->displayFrame;
482            disp.framebufferTarget->acquireFenceFd = -1;
483            disp.framebufferTarget->releaseFenceFd = -1;
484        }
485        disp.list->retireFenceFd = -1;
486        disp.list->flags = HWC_GEOMETRY_CHANGED;
487        disp.list->numHwLayers = numLayers;
488    }
489    return NO_ERROR;
490}
491
492status_t HWComposer::setFramebufferTarget(int32_t id,
493        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
494    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
495        return BAD_INDEX;
496    }
497    DisplayData& disp(mDisplayData[id]);
498    if (!disp.framebufferTarget) {
499        // this should never happen, but apparently eglCreateWindowSurface()
500        // triggers a SurfaceTextureClient::queueBuffer()  on some
501        // devices (!?) -- log and ignore.
502        ALOGE("HWComposer: framebufferTarget is null");
503        CallStack stack;
504        stack.update();
505        stack.dump("");
506        return NO_ERROR;
507    }
508
509    int acquireFenceFd = -1;
510    if (acquireFence != NULL) {
511        acquireFenceFd = acquireFence->dup();
512    }
513
514    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
515    disp.fbTargetHandle = buf->handle;
516    disp.framebufferTarget->handle = disp.fbTargetHandle;
517    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
518    return NO_ERROR;
519}
520
521status_t HWComposer::prepare() {
522    for (size_t i=0 ; i<mNumDisplays ; i++) {
523        DisplayData& disp(mDisplayData[i]);
524        if (disp.framebufferTarget) {
525            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
526            // DO NOT reset the handle field to NULL, because it's possible
527            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
528            // in which case, we should continue to use the same buffer.
529            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
530        }
531        mLists[i] = disp.list;
532        if (mLists[i]) {
533            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
534                mLists[i]->outbuf = NULL;
535                mLists[i]->outbufAcquireFenceFd = -1;
536            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
537                // garbage data to catch improper use
538                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
539                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
540            } else {
541                mLists[i]->dpy = EGL_NO_DISPLAY;
542                mLists[i]->sur = EGL_NO_SURFACE;
543            }
544        }
545    }
546
547    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
548    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
549
550    if (err == NO_ERROR) {
551        // here we're just making sure that "skip" layers are set
552        // to HWC_FRAMEBUFFER and we're also counting how many layers
553        // we have of each type.
554        for (size_t i=0 ; i<mNumDisplays ; i++) {
555            DisplayData& disp(mDisplayData[i]);
556            disp.hasFbComp = false;
557            disp.hasOvComp = false;
558            if (disp.list) {
559                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
560                    hwc_layer_1_t& l = disp.list->hwLayers[i];
561
562                    //ALOGD("prepare: %d, type=%d, handle=%p",
563                    //        i, l.compositionType, l.handle);
564
565                    if (l.flags & HWC_SKIP_LAYER) {
566                        l.compositionType = HWC_FRAMEBUFFER;
567                    }
568                    if (l.compositionType == HWC_FRAMEBUFFER) {
569                        disp.hasFbComp = true;
570                    }
571                    if (l.compositionType == HWC_OVERLAY) {
572                        disp.hasOvComp = true;
573                    }
574                }
575            }
576        }
577    }
578    return (status_t)err;
579}
580
581bool HWComposer::hasHwcComposition(int32_t id) const {
582    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
583        return false;
584    return mDisplayData[id].hasOvComp;
585}
586
587bool HWComposer::hasGlesComposition(int32_t id) const {
588    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
589        return false;
590    return mDisplayData[id].hasFbComp;
591}
592
593int HWComposer::getAndResetReleaseFenceFd(int32_t id) {
594    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
595        return BAD_INDEX;
596
597    int fd = INVALID_OPERATION;
598    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
599        const DisplayData& disp(mDisplayData[id]);
600        if (disp.framebufferTarget) {
601            fd = disp.framebufferTarget->releaseFenceFd;
602            disp.framebufferTarget->releaseFenceFd = -1;
603        }
604    }
605    return fd;
606}
607
608status_t HWComposer::commit() {
609    int err = NO_ERROR;
610    if (mHwc) {
611        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
612            // On version 1.0, the OpenGL ES target surface is communicated
613            // by the (dpy, sur) fields and we are guaranteed to have only
614            // a single display.
615            mLists[0]->dpy = eglGetCurrentDisplay();
616            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
617        }
618
619        err = mHwc->set(mHwc, mNumDisplays, mLists);
620
621        for (size_t i=0 ; i<mNumDisplays ; i++) {
622            DisplayData& disp(mDisplayData[i]);
623            if (disp.list) {
624                if (disp.list->retireFenceFd != -1) {
625                    close(disp.list->retireFenceFd);
626                    disp.list->retireFenceFd = -1;
627                }
628                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
629            }
630        }
631    }
632    return (status_t)err;
633}
634
635status_t HWComposer::release() const {
636    if (mHwc) {
637        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
638        return (status_t)mHwc->blank(mHwc, 0, 1);
639    }
640    return NO_ERROR;
641}
642
643status_t HWComposer::acquire() const {
644    if (mHwc) {
645        return (status_t)mHwc->blank(mHwc, 0, 0);
646    }
647    return NO_ERROR;
648}
649
650int HWComposer::getVisualID() const {
651    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
652        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
653        // is supported by the implementation. we can only be in this case
654        // if we have HWC 1.1
655        return HAL_PIXEL_FORMAT_RGBA_8888;
656        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
657    } else {
658        return mFbDev->format;
659    }
660}
661
662bool HWComposer::supportsFramebufferTarget() const {
663    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
664}
665
666int HWComposer::fbPost(int32_t id,
667        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
668    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
669        return setFramebufferTarget(id, acquireFence, buffer);
670    } else {
671        if (acquireFence != NULL) {
672            acquireFence->wait(Fence::TIMEOUT_NEVER);
673        }
674        return mFbDev->post(mFbDev, buffer->handle);
675    }
676}
677
678int HWComposer::fbCompositionComplete() {
679    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
680        return NO_ERROR;
681
682    if (mFbDev->compositionComplete) {
683        return mFbDev->compositionComplete(mFbDev);
684    } else {
685        return INVALID_OPERATION;
686    }
687}
688
689void HWComposer::fbDump(String8& result) {
690    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
691        const size_t SIZE = 4096;
692        char buffer[SIZE];
693        mFbDev->dump(mFbDev, buffer, SIZE);
694        result.append(buffer);
695    }
696}
697
698/*
699 * Helper template to implement a concrete HWCLayer
700 * This holds the pointer to the concrete hwc layer type
701 * and implements the "iterable" side of HWCLayer.
702 */
703template<typename CONCRETE, typename HWCTYPE>
704class Iterable : public HWComposer::HWCLayer {
705protected:
706    HWCTYPE* const mLayerList;
707    HWCTYPE* mCurrentLayer;
708    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
709    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
710    inline HWCTYPE* getLayer() { return mCurrentLayer; }
711    virtual ~Iterable() { }
712private:
713    // returns a copy of ourselves
714    virtual HWComposer::HWCLayer* dup() {
715        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
716    }
717    virtual status_t setLayer(size_t index) {
718        mCurrentLayer = &mLayerList[index];
719        return NO_ERROR;
720    }
721};
722
723/*
724 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
725 * This implements the HWCLayer side of HWCIterableLayer.
726 */
727class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
728public:
729    HWCLayerVersion1(hwc_layer_1_t* layer)
730        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer) { }
731
732    virtual int32_t getCompositionType() const {
733        return getLayer()->compositionType;
734    }
735    virtual uint32_t getHints() const {
736        return getLayer()->hints;
737    }
738    virtual int getAndResetReleaseFenceFd() {
739        int fd = getLayer()->releaseFenceFd;
740        getLayer()->releaseFenceFd = -1;
741        return fd;
742    }
743    virtual void setAcquireFenceFd(int fenceFd) {
744        getLayer()->acquireFenceFd = fenceFd;
745    }
746
747    virtual void setDefaultState() {
748        getLayer()->compositionType = HWC_FRAMEBUFFER;
749        getLayer()->hints = 0;
750        getLayer()->flags = HWC_SKIP_LAYER;
751        getLayer()->handle = 0;
752        getLayer()->transform = 0;
753        getLayer()->blending = HWC_BLENDING_NONE;
754        getLayer()->visibleRegionScreen.numRects = 0;
755        getLayer()->visibleRegionScreen.rects = NULL;
756        getLayer()->acquireFenceFd = -1;
757        getLayer()->releaseFenceFd = -1;
758    }
759    virtual void setSkip(bool skip) {
760        if (skip) {
761            getLayer()->flags |= HWC_SKIP_LAYER;
762        } else {
763            getLayer()->flags &= ~HWC_SKIP_LAYER;
764        }
765    }
766    virtual void setBlending(uint32_t blending) {
767        getLayer()->blending = blending;
768    }
769    virtual void setTransform(uint32_t transform) {
770        getLayer()->transform = transform;
771    }
772    virtual void setFrame(const Rect& frame) {
773        reinterpret_cast<Rect&>(getLayer()->displayFrame) = frame;
774    }
775    virtual void setCrop(const Rect& crop) {
776        reinterpret_cast<Rect&>(getLayer()->sourceCrop) = crop;
777    }
778    virtual void setVisibleRegionScreen(const Region& reg) {
779        // Region::getSharedBuffer creates a reference to the underlying
780        // SharedBuffer of this Region, this reference is freed
781        // in onDisplayed()
782        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
783        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
784        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
785    }
786    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
787        if (buffer == 0 || buffer->handle == 0) {
788            getLayer()->compositionType = HWC_FRAMEBUFFER;
789            getLayer()->flags |= HWC_SKIP_LAYER;
790            getLayer()->handle = 0;
791        } else {
792            getLayer()->handle = buffer->handle;
793        }
794    }
795    virtual void onDisplayed() {
796        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
797        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
798        if (sb) {
799            sb->release();
800            // not technically needed but safer
801            visibleRegion.numRects = 0;
802            visibleRegion.rects = NULL;
803        }
804
805        getLayer()->acquireFenceFd = -1;
806    }
807};
808
809/*
810 * returns an iterator initialized at a given index in the layer list
811 */
812HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
813    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
814        return LayerListIterator();
815    }
816    const DisplayData& disp(mDisplayData[id]);
817    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
818        return LayerListIterator();
819    }
820    return LayerListIterator(new HWCLayerVersion1(disp.list->hwLayers), index);
821}
822
823/*
824 * returns an iterator on the beginning of the layer list
825 */
826HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
827    return getLayerIterator(id, 0);
828}
829
830/*
831 * returns an iterator on the end of the layer list
832 */
833HWComposer::LayerListIterator HWComposer::end(int32_t id) {
834    size_t numLayers = 0;
835    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
836        const DisplayData& disp(mDisplayData[id]);
837        if (mHwc && disp.list) {
838            numLayers = disp.list->numHwLayers;
839            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
840                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
841                // which we ignore when iterating through the layer list.
842                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
843                if (numLayers) {
844                    numLayers--;
845                }
846            }
847        }
848    }
849    return getLayerIterator(id, numLayers);
850}
851
852void HWComposer::dump(String8& result, char* buffer, size_t SIZE,
853        const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const {
854    if (mHwc) {
855        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
856        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
857        for (size_t i=0 ; i<mNumDisplays ; i++) {
858            const DisplayData& disp(mDisplayData[i]);
859            if (disp.list) {
860                result.appendFormat("  id=%d, numHwLayers=%u, flags=%08x\n",
861                        i, disp.list->numHwLayers, disp.list->flags);
862                result.append(
863                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
864                        "------------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
865                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
866                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
867                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
868                    int32_t format = -1;
869                    String8 name("unknown");
870                    if (i < visibleLayersSortedByZ.size()) {
871                        const sp<LayerBase>& layer(visibleLayersSortedByZ[i]);
872                        if (layer->getLayer() != NULL) {
873                            const sp<GraphicBuffer>& buffer(
874                                layer->getLayer()->getActiveBuffer());
875                            if (buffer != NULL) {
876                                format = buffer->getPixelFormat();
877                            }
878                        }
879                        name = layer->getName();
880                    }
881
882                    int type = l.compositionType;
883                    if (type == HWC_FRAMEBUFFER_TARGET) {
884                        name = "HWC_FRAMEBUFFER_TARGET";
885                        format = disp.format;
886                    }
887
888                    static char const* compositionTypeName[] = {
889                            "GLES",
890                            "HWC",
891                            "BACKGROUND",
892                            "FB TARGET",
893                            "UNKNOWN"};
894                    if (type >= NELEM(compositionTypeName))
895                        type = NELEM(compositionTypeName) - 1;
896
897                    result.appendFormat(
898                            " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
899                                    compositionTypeName[type],
900                                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
901                                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
902                                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
903                                    name.string());
904                }
905            }
906        }
907    }
908
909    if (mHwc && mHwc->dump) {
910        mHwc->dump(mHwc, buffer, SIZE);
911        result.append(buffer);
912    }
913}
914
915// ---------------------------------------------------------------------------
916
917HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
918    : mHwc(hwc), mEnabled(false),
919      mNextFakeVSync(0),
920      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
921{
922}
923
924void HWComposer::VSyncThread::setEnabled(bool enabled) {
925    Mutex::Autolock _l(mLock);
926    mEnabled = enabled;
927    mCondition.signal();
928}
929
930void HWComposer::VSyncThread::onFirstRef() {
931    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
932}
933
934bool HWComposer::VSyncThread::threadLoop() {
935    { // scope for lock
936        Mutex::Autolock _l(mLock);
937        while (!mEnabled) {
938            mCondition.wait(mLock);
939        }
940    }
941
942    const nsecs_t period = mRefreshPeriod;
943    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
944    nsecs_t next_vsync = mNextFakeVSync;
945    nsecs_t sleep = next_vsync - now;
946    if (sleep < 0) {
947        // we missed, find where the next vsync should be
948        sleep = (period - ((now - next_vsync) % period));
949        next_vsync = now + sleep;
950    }
951    mNextFakeVSync = next_vsync + period;
952
953    struct timespec spec;
954    spec.tv_sec  = next_vsync / 1000000000;
955    spec.tv_nsec = next_vsync % 1000000000;
956
957    int err;
958    do {
959        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
960    } while (err<0 && errno == EINTR);
961
962    if (err == 0) {
963        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
964    }
965
966    return true;
967}
968
969// ---------------------------------------------------------------------------
970}; // namespace android
971