HWComposer.cpp revision 5a8f9012ee8bb9dc1ad14432b96a821f08802ee3 
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        eventControl(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.connected = true;
176        disp.width = mFbDev->width;
177        disp.height = mFbDev->height;
178        disp.format = mFbDev->format;
179        disp.xdpi = mFbDev->xdpi;
180        disp.ydpi = mFbDev->ydpi;
181        if (disp.refresh == 0) {
182            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
183            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
184        }
185        if (disp.refresh == 0) {
186            disp.refresh = nsecs_t(1e9 / 60.0);
187            ALOGW("getting VSYNC period from thin air: %lld",
188                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
189        }
190    } else if (mHwc) {
191        // here we're guaranteed to have at least HWC 1.1
192        for (size_t i =0 ; i<HWC_NUM_DISPLAY_TYPES ; i++) {
193            queryDisplayProperties(i);
194        }
195    }
196
197    if (needVSyncThread) {
198        // we don't have VSYNC support, we need to fake it
199        mVSyncThread = new VSyncThread(*this);
200    }
201}
202
203HWComposer::~HWComposer() {
204    if (mHwc) {
205        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
206    }
207    if (mVSyncThread != NULL) {
208        mVSyncThread->requestExitAndWait();
209    }
210    if (mHwc) {
211        hwc_close_1(mHwc);
212    }
213    if (mFbDev) {
214        framebuffer_close(mFbDev);
215    }
216    delete mCBContext;
217}
218
219// Load and prepare the hardware composer module.  Sets mHwc.
220void HWComposer::loadHwcModule()
221{
222    hw_module_t const* module;
223
224    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
225        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
226        return;
227    }
228
229    int err = hwc_open_1(module, &mHwc);
230    if (err) {
231        ALOGE("%s device failed to initialize (%s)",
232              HWC_HARDWARE_COMPOSER, strerror(-err));
233        return;
234    }
235
236    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
237            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
238            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
239        ALOGE("%s device version %#x unsupported, will not be used",
240              HWC_HARDWARE_COMPOSER, mHwc->common.version);
241        hwc_close_1(mHwc);
242        mHwc = NULL;
243        return;
244    }
245}
246
247// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
248void HWComposer::loadFbHalModule()
249{
250    hw_module_t const* module;
251
252    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) != 0) {
253        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
254        return;
255    }
256
257    int err = framebuffer_open(module, &mFbDev);
258    if (err) {
259        ALOGE("framebuffer_open failed (%s)", strerror(-err));
260        return;
261    }
262}
263
264status_t HWComposer::initCheck() const {
265    return mHwc ? NO_ERROR : NO_INIT;
266}
267
268void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
269    cb_context* ctx = reinterpret_cast<cb_context*>(
270            const_cast<hwc_procs_t*>(procs));
271    ctx->hwc->invalidate();
272}
273
274void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
275        int64_t timestamp) {
276    cb_context* ctx = reinterpret_cast<cb_context*>(
277            const_cast<hwc_procs_t*>(procs));
278    ctx->hwc->vsync(disp, timestamp);
279}
280
281void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
282        int connected) {
283    cb_context* ctx = reinterpret_cast<cb_context*>(
284            const_cast<hwc_procs_t*>(procs));
285    ctx->hwc->hotplug(disp, connected);
286}
287
288void HWComposer::invalidate() {
289    mFlinger->repaintEverything();
290}
291
292void HWComposer::vsync(int disp, int64_t timestamp) {
293    ATRACE_INT("VSYNC", ++mVSyncCount&1);
294    mEventHandler.onVSyncReceived(disp, timestamp);
295    Mutex::Autolock _l(mLock);
296    mLastHwVSync = timestamp;
297}
298
299void HWComposer::hotplug(int disp, int connected) {
300    if (disp == HWC_DISPLAY_PRIMARY || disp >= HWC_NUM_DISPLAY_TYPES) {
301        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
302                disp, connected);
303        return;
304    }
305    queryDisplayProperties(disp);
306    mEventHandler.onHotplugReceived(disp, bool(connected));
307}
308
309static const uint32_t DISPLAY_ATTRIBUTES[] = {
310    HWC_DISPLAY_VSYNC_PERIOD,
311    HWC_DISPLAY_WIDTH,
312    HWC_DISPLAY_HEIGHT,
313    HWC_DISPLAY_DPI_X,
314    HWC_DISPLAY_DPI_Y,
315    HWC_DISPLAY_NO_ATTRIBUTE,
316};
317#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
318
319// http://developer.android.com/reference/android/util/DisplayMetrics.html
320#define ANDROID_DENSITY_TV    213
321#define ANDROID_DENSITY_XHIGH 320
322
323status_t HWComposer::queryDisplayProperties(int disp) {
324
325    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
326
327    // use zero as default value for unspecified attributes
328    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
329    memset(values, 0, sizeof(values));
330
331    uint32_t config;
332    size_t numConfigs = 1;
333    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
334    if (err != NO_ERROR) {
335        // this can happen if an unpluggable display is not connected
336        mDisplayData[disp].connected = false;
337        return err;
338    }
339
340    err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
341    if (err != NO_ERROR) {
342        // we can't get this display's info. turn it off.
343        mDisplayData[disp].connected = false;
344        return err;
345    }
346
347    int32_t w = 0, h = 0;
348    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
349        switch (DISPLAY_ATTRIBUTES[i]) {
350        case HWC_DISPLAY_VSYNC_PERIOD:
351            mDisplayData[disp].refresh = nsecs_t(values[i]);
352            break;
353        case HWC_DISPLAY_WIDTH:
354            mDisplayData[disp].width = values[i];
355            break;
356        case HWC_DISPLAY_HEIGHT:
357            mDisplayData[disp].height = values[i];
358            break;
359        case HWC_DISPLAY_DPI_X:
360            mDisplayData[disp].xdpi = values[i] / 1000.0f;
361            break;
362        case HWC_DISPLAY_DPI_Y:
363            mDisplayData[disp].ydpi = values[i] / 1000.0f;
364            break;
365        default:
366            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
367                    i, DISPLAY_ATTRIBUTES[i]);
368            break;
369        }
370    }
371
372    // FIXME: what should we set the format to?
373    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
374    mDisplayData[disp].connected = true;
375    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
376        // is there anything smarter we can do?
377        if (h >= 1080) {
378            mDisplayData[disp].xdpi = ANDROID_DENSITY_XHIGH;
379            mDisplayData[disp].ydpi = ANDROID_DENSITY_XHIGH;
380        } else {
381            mDisplayData[disp].xdpi = ANDROID_DENSITY_TV;
382            mDisplayData[disp].ydpi = ANDROID_DENSITY_TV;
383        }
384    }
385    return NO_ERROR;
386}
387
388int32_t HWComposer::allocateDisplayId() {
389    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
390        return NO_MEMORY;
391    }
392    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
393    mAllocatedDisplayIDs.markBit(id);
394    return id;
395}
396
397status_t HWComposer::freeDisplayId(int32_t id) {
398    if (id < HWC_NUM_DISPLAY_TYPES) {
399        // cannot free the reserved IDs
400        return BAD_VALUE;
401    }
402    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
403        return BAD_INDEX;
404    }
405    mAllocatedDisplayIDs.clearBit(id);
406    return NO_ERROR;
407}
408
409nsecs_t HWComposer::getRefreshPeriod(int disp) const {
410    return mDisplayData[disp].refresh;
411}
412
413nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
414    // this returns the last refresh timestamp.
415    // if the last one is not available, we estimate it based on
416    // the refresh period and whatever closest timestamp we have.
417    Mutex::Autolock _l(mLock);
418    nsecs_t now = systemTime(CLOCK_MONOTONIC);
419    return now - ((now - mLastHwVSync) %  mDisplayData[disp].refresh);
420}
421
422uint32_t HWComposer::getWidth(int disp) const {
423    return mDisplayData[disp].width;
424}
425
426uint32_t HWComposer::getHeight(int disp) const {
427    return mDisplayData[disp].height;
428}
429
430uint32_t HWComposer::getFormat(int disp) const {
431    return mDisplayData[disp].format;
432}
433
434float HWComposer::getDpiX(int disp) const {
435    return mDisplayData[disp].xdpi;
436}
437
438float HWComposer::getDpiY(int disp) const {
439    return mDisplayData[disp].ydpi;
440}
441
442bool HWComposer::isConnected(int disp) const {
443    return mDisplayData[disp].connected;
444}
445
446void HWComposer::eventControl(int disp, int event, int enabled) {
447    if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
448        return;
449    }
450    status_t err = NO_ERROR;
451    if (mHwc && !mDebugForceFakeVSync) {
452        // NOTE: we use our own internal lock here because we have to call
453        // into the HWC with the lock held, and we want to make sure
454        // that even if HWC blocks (which it shouldn't), it won't
455        // affect other threads.
456        Mutex::Autolock _l(mEventControlLock);
457        const int32_t eventBit = 1UL << event;
458        const int32_t newValue = enabled ? eventBit : 0;
459        const int32_t oldValue = mDisplayData[disp].events & eventBit;
460        if (newValue != oldValue) {
461            ATRACE_CALL();
462            err = mHwc->eventControl(mHwc, disp, event, enabled);
463            if (!err) {
464                int32_t& events(mDisplayData[disp].events);
465                events = (events & ~eventBit) | newValue;
466            }
467        }
468        // error here should not happen -- not sure what we should
469        // do if it does.
470        ALOGE_IF(err, "eventControl(%d, %d) failed %s",
471                event, enabled, strerror(-err));
472    }
473
474    if (err == NO_ERROR && mVSyncThread != NULL) {
475        mVSyncThread->setEnabled(enabled);
476    }
477}
478
479status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
480    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
481        return BAD_INDEX;
482    }
483
484    if (mHwc) {
485        DisplayData& disp(mDisplayData[id]);
486        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
487            // we need space for the HWC_FRAMEBUFFER_TARGET
488            numLayers++;
489        }
490        if (disp.capacity < numLayers || disp.list == NULL) {
491            size_t size = sizeof(hwc_display_contents_1_t)
492                    + numLayers * sizeof(hwc_layer_1_t);
493            free(disp.list);
494            disp.list = (hwc_display_contents_1_t*)malloc(size);
495            disp.capacity = numLayers;
496        }
497        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
498            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
499            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
500            const hwc_rect_t r = { 0, 0, disp.width, disp.height };
501            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
502            disp.framebufferTarget->hints = 0;
503            disp.framebufferTarget->flags = 0;
504            disp.framebufferTarget->handle = disp.fbTargetHandle;
505            disp.framebufferTarget->transform = 0;
506            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
507            disp.framebufferTarget->sourceCrop = r;
508            disp.framebufferTarget->displayFrame = r;
509            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
510            disp.framebufferTarget->visibleRegionScreen.rects =
511                &disp.framebufferTarget->displayFrame;
512            disp.framebufferTarget->acquireFenceFd = -1;
513            disp.framebufferTarget->releaseFenceFd = -1;
514        }
515        disp.list->retireFenceFd = -1;
516        disp.list->flags = HWC_GEOMETRY_CHANGED;
517        disp.list->numHwLayers = numLayers;
518    }
519    return NO_ERROR;
520}
521
522status_t HWComposer::setFramebufferTarget(int32_t id,
523        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
524    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
525        return BAD_INDEX;
526    }
527    DisplayData& disp(mDisplayData[id]);
528    if (!disp.framebufferTarget) {
529        // this should never happen, but apparently eglCreateWindowSurface()
530        // triggers a SurfaceTextureClient::queueBuffer()  on some
531        // devices (!?) -- log and ignore.
532        ALOGE("HWComposer: framebufferTarget is null");
533//        CallStack stack;
534//        stack.update();
535//        stack.dump("");
536        return NO_ERROR;
537    }
538
539    int acquireFenceFd = -1;
540    if (acquireFence != NULL) {
541        acquireFenceFd = acquireFence->dup();
542    }
543
544    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
545    disp.fbTargetHandle = buf->handle;
546    disp.framebufferTarget->handle = disp.fbTargetHandle;
547    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
548    return NO_ERROR;
549}
550
551status_t HWComposer::prepare() {
552    for (size_t i=0 ; i<mNumDisplays ; i++) {
553        DisplayData& disp(mDisplayData[i]);
554        if (disp.framebufferTarget) {
555            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
556            // DO NOT reset the handle field to NULL, because it's possible
557            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
558            // in which case, we should continue to use the same buffer.
559            LOG_FATAL_IF(disp.list == NULL);
560            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
561        }
562        if (!disp.connected && disp.list != NULL) {
563            ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
564                  i, disp.list->numHwLayers);
565        }
566        mLists[i] = disp.list;
567        if (mLists[i]) {
568            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
569                mLists[i]->outbuf = NULL;
570                mLists[i]->outbufAcquireFenceFd = -1;
571            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
572                // garbage data to catch improper use
573                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
574                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
575            } else {
576                mLists[i]->dpy = EGL_NO_DISPLAY;
577                mLists[i]->sur = EGL_NO_SURFACE;
578            }
579        }
580    }
581
582    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
583    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
584
585    if (err == NO_ERROR) {
586        // here we're just making sure that "skip" layers are set
587        // to HWC_FRAMEBUFFER and we're also counting how many layers
588        // we have of each type.
589        for (size_t i=0 ; i<mNumDisplays ; i++) {
590            DisplayData& disp(mDisplayData[i]);
591            disp.hasFbComp = false;
592            disp.hasOvComp = false;
593            if (disp.list) {
594                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
595                    hwc_layer_1_t& l = disp.list->hwLayers[i];
596
597                    //ALOGD("prepare: %d, type=%d, handle=%p",
598                    //        i, l.compositionType, l.handle);
599
600                    if (l.flags & HWC_SKIP_LAYER) {
601                        l.compositionType = HWC_FRAMEBUFFER;
602                    }
603                    if (l.compositionType == HWC_FRAMEBUFFER) {
604                        disp.hasFbComp = true;
605                    }
606                    if (l.compositionType == HWC_OVERLAY) {
607                        disp.hasOvComp = true;
608                    }
609                }
610            }
611        }
612    }
613    return (status_t)err;
614}
615
616bool HWComposer::hasHwcComposition(int32_t id) const {
617    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
618        return false;
619    return mDisplayData[id].hasOvComp;
620}
621
622bool HWComposer::hasGlesComposition(int32_t id) const {
623    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
624        return false;
625    return mDisplayData[id].hasFbComp;
626}
627
628int HWComposer::getAndResetReleaseFenceFd(int32_t id) {
629    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
630        return BAD_INDEX;
631
632    int fd = INVALID_OPERATION;
633    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
634        const DisplayData& disp(mDisplayData[id]);
635        if (disp.framebufferTarget) {
636            fd = disp.framebufferTarget->releaseFenceFd;
637            disp.framebufferTarget->acquireFenceFd = -1;
638            disp.framebufferTarget->releaseFenceFd = -1;
639        }
640    }
641    return fd;
642}
643
644status_t HWComposer::commit() {
645    int err = NO_ERROR;
646    if (mHwc) {
647        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
648            // On version 1.0, the OpenGL ES target surface is communicated
649            // by the (dpy, sur) fields and we are guaranteed to have only
650            // a single display.
651            mLists[0]->dpy = eglGetCurrentDisplay();
652            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
653        }
654
655        err = mHwc->set(mHwc, mNumDisplays, mLists);
656
657        for (size_t i=0 ; i<mNumDisplays ; i++) {
658            DisplayData& disp(mDisplayData[i]);
659            if (disp.list) {
660                if (disp.list->retireFenceFd != -1) {
661                    close(disp.list->retireFenceFd);
662                    disp.list->retireFenceFd = -1;
663                }
664                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
665            }
666        }
667    }
668    return (status_t)err;
669}
670
671status_t HWComposer::release(int disp) {
672    LOG_FATAL_IF(disp >= HWC_NUM_DISPLAY_TYPES);
673    if (mHwc) {
674        eventControl(disp, HWC_EVENT_VSYNC, 0);
675        return (status_t)mHwc->blank(mHwc, disp, 1);
676    }
677    return NO_ERROR;
678}
679
680status_t HWComposer::acquire(int disp) {
681    LOG_FATAL_IF(disp >= HWC_NUM_DISPLAY_TYPES);
682    if (mHwc) {
683        return (status_t)mHwc->blank(mHwc, disp, 0);
684    }
685    return NO_ERROR;
686}
687
688void HWComposer::disconnectDisplay(int disp) {
689    LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY);
690    if (disp >= HWC_NUM_DISPLAY_TYPES) {
691        // nothing to do for these yet
692        return;
693    }
694    DisplayData& dd(mDisplayData[disp]);
695    if (dd.list != NULL) {
696        free(dd.list);
697        dd.list = NULL;
698        dd.framebufferTarget = NULL;    // points into dd.list
699    }
700}
701
702int HWComposer::getVisualID() const {
703    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
704        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
705        // is supported by the implementation. we can only be in this case
706        // if we have HWC 1.1
707        return HAL_PIXEL_FORMAT_RGBA_8888;
708        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
709    } else {
710        return mFbDev->format;
711    }
712}
713
714bool HWComposer::supportsFramebufferTarget() const {
715    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
716}
717
718int HWComposer::fbPost(int32_t id,
719        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
720    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
721        return setFramebufferTarget(id, acquireFence, buffer);
722    } else {
723        if (acquireFence != NULL) {
724            acquireFence->waitForever(1000, "HWComposer::fbPost");
725        }
726        return mFbDev->post(mFbDev, buffer->handle);
727    }
728}
729
730int HWComposer::fbCompositionComplete() {
731    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
732        return NO_ERROR;
733
734    if (mFbDev->compositionComplete) {
735        return mFbDev->compositionComplete(mFbDev);
736    } else {
737        return INVALID_OPERATION;
738    }
739}
740
741void HWComposer::fbDump(String8& result) {
742    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
743        const size_t SIZE = 4096;
744        char buffer[SIZE];
745        mFbDev->dump(mFbDev, buffer, SIZE);
746        result.append(buffer);
747    }
748}
749
750/*
751 * Helper template to implement a concrete HWCLayer
752 * This holds the pointer to the concrete hwc layer type
753 * and implements the "iterable" side of HWCLayer.
754 */
755template<typename CONCRETE, typename HWCTYPE>
756class Iterable : public HWComposer::HWCLayer {
757protected:
758    HWCTYPE* const mLayerList;
759    HWCTYPE* mCurrentLayer;
760    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
761    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
762    inline HWCTYPE* getLayer() { return mCurrentLayer; }
763    virtual ~Iterable() { }
764private:
765    // returns a copy of ourselves
766    virtual HWComposer::HWCLayer* dup() {
767        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
768    }
769    virtual status_t setLayer(size_t index) {
770        mCurrentLayer = &mLayerList[index];
771        return NO_ERROR;
772    }
773};
774
775/*
776 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
777 * This implements the HWCLayer side of HWCIterableLayer.
778 */
779class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
780public:
781    HWCLayerVersion1(hwc_layer_1_t* layer)
782        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer) { }
783
784    virtual int32_t getCompositionType() const {
785        return getLayer()->compositionType;
786    }
787    virtual uint32_t getHints() const {
788        return getLayer()->hints;
789    }
790    virtual int getAndResetReleaseFenceFd() {
791        int fd = getLayer()->releaseFenceFd;
792        getLayer()->releaseFenceFd = -1;
793        return fd;
794    }
795    virtual void setAcquireFenceFd(int fenceFd) {
796        getLayer()->acquireFenceFd = fenceFd;
797    }
798
799    virtual void setDefaultState() {
800        getLayer()->compositionType = HWC_FRAMEBUFFER;
801        getLayer()->hints = 0;
802        getLayer()->flags = HWC_SKIP_LAYER;
803        getLayer()->handle = 0;
804        getLayer()->transform = 0;
805        getLayer()->blending = HWC_BLENDING_NONE;
806        getLayer()->visibleRegionScreen.numRects = 0;
807        getLayer()->visibleRegionScreen.rects = NULL;
808        getLayer()->acquireFenceFd = -1;
809        getLayer()->releaseFenceFd = -1;
810    }
811    virtual void setSkip(bool skip) {
812        if (skip) {
813            getLayer()->flags |= HWC_SKIP_LAYER;
814        } else {
815            getLayer()->flags &= ~HWC_SKIP_LAYER;
816        }
817    }
818    virtual void setBlending(uint32_t blending) {
819        getLayer()->blending = blending;
820    }
821    virtual void setTransform(uint32_t transform) {
822        getLayer()->transform = transform;
823    }
824    virtual void setFrame(const Rect& frame) {
825        reinterpret_cast<Rect&>(getLayer()->displayFrame) = frame;
826    }
827    virtual void setCrop(const Rect& crop) {
828        reinterpret_cast<Rect&>(getLayer()->sourceCrop) = crop;
829    }
830    virtual void setVisibleRegionScreen(const Region& reg) {
831        // Region::getSharedBuffer creates a reference to the underlying
832        // SharedBuffer of this Region, this reference is freed
833        // in onDisplayed()
834        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
835        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
836        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
837    }
838    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
839        if (buffer == 0 || buffer->handle == 0) {
840            getLayer()->compositionType = HWC_FRAMEBUFFER;
841            getLayer()->flags |= HWC_SKIP_LAYER;
842            getLayer()->handle = 0;
843        } else {
844            getLayer()->handle = buffer->handle;
845        }
846    }
847    virtual void onDisplayed() {
848        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
849        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
850        if (sb) {
851            sb->release();
852            // not technically needed but safer
853            visibleRegion.numRects = 0;
854            visibleRegion.rects = NULL;
855        }
856
857        getLayer()->acquireFenceFd = -1;
858    }
859};
860
861/*
862 * returns an iterator initialized at a given index in the layer list
863 */
864HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
865    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
866        return LayerListIterator();
867    }
868    const DisplayData& disp(mDisplayData[id]);
869    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
870        return LayerListIterator();
871    }
872    return LayerListIterator(new HWCLayerVersion1(disp.list->hwLayers), index);
873}
874
875/*
876 * returns an iterator on the beginning of the layer list
877 */
878HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
879    return getLayerIterator(id, 0);
880}
881
882/*
883 * returns an iterator on the end of the layer list
884 */
885HWComposer::LayerListIterator HWComposer::end(int32_t id) {
886    size_t numLayers = 0;
887    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
888        const DisplayData& disp(mDisplayData[id]);
889        if (mHwc && disp.list) {
890            numLayers = disp.list->numHwLayers;
891            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
892                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
893                // which we ignore when iterating through the layer list.
894                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
895                if (numLayers) {
896                    numLayers--;
897                }
898            }
899        }
900    }
901    return getLayerIterator(id, numLayers);
902}
903
904void HWComposer::dump(String8& result, char* buffer, size_t SIZE,
905        const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const {
906    if (mHwc) {
907        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
908        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
909        for (size_t i=0 ; i<mNumDisplays ; i++) {
910            const DisplayData& disp(mDisplayData[i]);
911
912            if (disp.connected) {
913                result.appendFormat(
914                        "  Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
915                        i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
916            }
917
918            if (disp.list && disp.connected) {
919                result.appendFormat(
920                        "  numHwLayers=%u, flags=%08x\n",
921                        disp.list->numHwLayers, disp.list->flags);
922
923                result.append(
924                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
925                        "------------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
926                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
927                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
928                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
929                    int32_t format = -1;
930                    String8 name("unknown");
931                    if (i < visibleLayersSortedByZ.size()) {
932                        const sp<LayerBase>& layer(visibleLayersSortedByZ[i]);
933                        if (layer->getLayer() != NULL) {
934                            const sp<GraphicBuffer>& buffer(
935                                layer->getLayer()->getActiveBuffer());
936                            if (buffer != NULL) {
937                                format = buffer->getPixelFormat();
938                            }
939                        }
940                        name = layer->getName();
941                    }
942
943                    int type = l.compositionType;
944                    if (type == HWC_FRAMEBUFFER_TARGET) {
945                        name = "HWC_FRAMEBUFFER_TARGET";
946                        format = disp.format;
947                    }
948
949                    static char const* compositionTypeName[] = {
950                            "GLES",
951                            "HWC",
952                            "BACKGROUND",
953                            "FB TARGET",
954                            "UNKNOWN"};
955                    if (type >= NELEM(compositionTypeName))
956                        type = NELEM(compositionTypeName) - 1;
957
958                    result.appendFormat(
959                            " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
960                                    compositionTypeName[type],
961                                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
962                                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
963                                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
964                                    name.string());
965                }
966            }
967        }
968    }
969
970    if (mHwc && mHwc->dump) {
971        mHwc->dump(mHwc, buffer, SIZE);
972        result.append(buffer);
973    }
974}
975
976// ---------------------------------------------------------------------------
977
978HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
979    : mHwc(hwc), mEnabled(false),
980      mNextFakeVSync(0),
981      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
982{
983}
984
985void HWComposer::VSyncThread::setEnabled(bool enabled) {
986    Mutex::Autolock _l(mLock);
987    if (mEnabled != enabled) {
988        mEnabled = enabled;
989        mCondition.signal();
990    }
991}
992
993void HWComposer::VSyncThread::onFirstRef() {
994    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
995}
996
997bool HWComposer::VSyncThread::threadLoop() {
998    { // scope for lock
999        Mutex::Autolock _l(mLock);
1000        while (!mEnabled) {
1001            mCondition.wait(mLock);
1002        }
1003    }
1004
1005    const nsecs_t period = mRefreshPeriod;
1006    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
1007    nsecs_t next_vsync = mNextFakeVSync;
1008    nsecs_t sleep = next_vsync - now;
1009    if (sleep < 0) {
1010        // we missed, find where the next vsync should be
1011        sleep = (period - ((now - next_vsync) % period));
1012        next_vsync = now + sleep;
1013    }
1014    mNextFakeVSync = next_vsync + period;
1015
1016    struct timespec spec;
1017    spec.tv_sec  = next_vsync / 1000000000;
1018    spec.tv_nsec = next_vsync % 1000000000;
1019
1020    int err;
1021    do {
1022        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1023    } while (err<0 && errno == EINTR);
1024
1025    if (err == 0) {
1026        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1027    }
1028
1029    return true;
1030}
1031
1032// ---------------------------------------------------------------------------
1033}; // namespace android
1034