HWComposer.cpp revision adbb3062e1a3d675531367c055572664fc46280d 
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/Errors.h>
27#include <utils/misc.h>
28#include <utils/String8.h>
29#include <utils/Thread.h>
30#include <utils/Trace.h>
31#include <utils/Vector.h>
32
33#include <ui/GraphicBuffer.h>
34
35#include <hardware/hardware.h>
36#include <hardware/hwcomposer.h>
37
38#include <android/configuration.h>
39
40#include <cutils/log.h>
41#include <cutils/properties.h>
42
43#include "HWComposer.h"
44
45#include "../Layer.h"           // needed only for debugging
46#include "../SurfaceFlinger.h"
47
48namespace android {
49
50#define MIN_HWC_HEADER_VERSION HWC_HEADER_VERSION
51
52static uint32_t hwcApiVersion(const hwc_composer_device_1_t* hwc) {
53    uint32_t hwcVersion = hwc->common.version;
54    return hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK;
55}
56
57static uint32_t hwcHeaderVersion(const hwc_composer_device_1_t* hwc) {
58    uint32_t hwcVersion = hwc->common.version;
59    return hwcVersion & HARDWARE_API_VERSION_2_HEADER_MASK;
60}
61
62static bool hwcHasApiVersion(const hwc_composer_device_1_t* hwc,
63        uint32_t version) {
64    return hwcApiVersion(hwc) >= (version & HARDWARE_API_VERSION_2_MAJ_MIN_MASK);
65}
66
67// ---------------------------------------------------------------------------
68
69struct HWComposer::cb_context {
70    struct callbacks : public hwc_procs_t {
71        // these are here to facilitate the transition when adding
72        // new callbacks (an implementation can check for NULL before
73        // calling a new callback).
74        void (*zero[4])(void);
75    };
76    callbacks procs;
77    HWComposer* hwc;
78};
79
80// ---------------------------------------------------------------------------
81
82HWComposer::HWComposer(
83        const sp<SurfaceFlinger>& flinger,
84        EventHandler& handler)
85    : mFlinger(flinger),
86      mFbDev(0), mHwc(0), mNumDisplays(1),
87      mCBContext(new cb_context),
88      mEventHandler(handler),
89      mDebugForceFakeVSync(false)
90{
91    for (size_t i =0 ; i<MAX_HWC_DISPLAYS ; i++) {
92        mLists[i] = 0;
93    }
94
95    for (size_t i=0 ; i<HWC_NUM_PHYSICAL_DISPLAY_TYPES ; i++) {
96        mLastHwVSync[i] = 0;
97        mVSyncCounts[i] = 0;
98    }
99
100    char value[PROPERTY_VALUE_MAX];
101    property_get("debug.sf.no_hw_vsync", value, "0");
102    mDebugForceFakeVSync = atoi(value);
103
104    bool needVSyncThread = true;
105
106    // Note: some devices may insist that the FB HAL be opened before HWC.
107    int fberr = loadFbHalModule();
108    loadHwcModule();
109
110    if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
111        // close FB HAL if we don't needed it.
112        // FIXME: this is temporary until we're not forced to open FB HAL
113        // before HWC.
114        framebuffer_close(mFbDev);
115        mFbDev = NULL;
116    }
117
118    // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
119    if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
120            && !mFbDev) {
121        ALOGE("ERROR: failed to open framebuffer (%s), aborting",
122                strerror(-fberr));
123        abort();
124    }
125
126    // these display IDs are always reserved
127    for (size_t i=0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
128        mAllocatedDisplayIDs.markBit(i);
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        // the number of displays we actually have depends on the
153        // hw composer version
154        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
155            // 1.3 adds support for virtual displays
156            mNumDisplays = MAX_HWC_DISPLAYS;
157        } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
158            // 1.1 adds support for multiple displays
159            mNumDisplays = NUM_BUILTIN_DISPLAYS;
160        } else {
161            mNumDisplays = 1;
162        }
163    }
164
165    if (mFbDev) {
166        ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
167                "should only have fbdev if no hwc or hwc is 1.0");
168
169        DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
170        disp.connected = true;
171        disp.width = mFbDev->width;
172        disp.height = mFbDev->height;
173        disp.format = mFbDev->format;
174        disp.xdpi = mFbDev->xdpi;
175        disp.ydpi = mFbDev->ydpi;
176        if (disp.refresh == 0) {
177            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
178            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
179        }
180        if (disp.refresh == 0) {
181            disp.refresh = nsecs_t(1e9 / 60.0);
182            ALOGW("getting VSYNC period from thin air: %lld",
183                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
184        }
185    } else if (mHwc) {
186        // here we're guaranteed to have at least HWC 1.1
187        for (size_t i =0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
188            queryDisplayProperties(i);
189        }
190    }
191
192    if (needVSyncThread) {
193        // we don't have VSYNC support, we need to fake it
194        mVSyncThread = new VSyncThread(*this);
195    }
196}
197
198HWComposer::~HWComposer() {
199    if (mHwc) {
200        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
201    }
202    if (mVSyncThread != NULL) {
203        mVSyncThread->requestExitAndWait();
204    }
205    if (mHwc) {
206        hwc_close_1(mHwc);
207    }
208    if (mFbDev) {
209        framebuffer_close(mFbDev);
210    }
211    delete mCBContext;
212}
213
214// Load and prepare the hardware composer module.  Sets mHwc.
215void HWComposer::loadHwcModule()
216{
217    hw_module_t const* module;
218
219    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
220        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
221        return;
222    }
223
224    int err = hwc_open_1(module, &mHwc);
225    if (err) {
226        ALOGE("%s device failed to initialize (%s)",
227              HWC_HARDWARE_COMPOSER, strerror(-err));
228        return;
229    }
230
231    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
232            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
233            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
234        ALOGE("%s device version %#x unsupported, will not be used",
235              HWC_HARDWARE_COMPOSER, mHwc->common.version);
236        hwc_close_1(mHwc);
237        mHwc = NULL;
238        return;
239    }
240}
241
242// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
243int HWComposer::loadFbHalModule()
244{
245    hw_module_t const* module;
246
247    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
248    if (err != 0) {
249        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
250        return err;
251    }
252
253    return framebuffer_open(module, &mFbDev);
254}
255
256status_t HWComposer::initCheck() const {
257    return mHwc ? NO_ERROR : NO_INIT;
258}
259
260void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
261    cb_context* ctx = reinterpret_cast<cb_context*>(
262            const_cast<hwc_procs_t*>(procs));
263    ctx->hwc->invalidate();
264}
265
266void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
267        int64_t timestamp) {
268    cb_context* ctx = reinterpret_cast<cb_context*>(
269            const_cast<hwc_procs_t*>(procs));
270    ctx->hwc->vsync(disp, timestamp);
271}
272
273void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
274        int connected) {
275    cb_context* ctx = reinterpret_cast<cb_context*>(
276            const_cast<hwc_procs_t*>(procs));
277    ctx->hwc->hotplug(disp, connected);
278}
279
280void HWComposer::invalidate() {
281    mFlinger->repaintEverything();
282}
283
284void HWComposer::vsync(int disp, int64_t timestamp) {
285    if (uint32_t(disp) < HWC_NUM_PHYSICAL_DISPLAY_TYPES) {
286        {
287            Mutex::Autolock _l(mLock);
288
289            // There have been reports of HWCs that signal several vsync events
290            // with the same timestamp when turning the display off and on. This
291            // is a bug in the HWC implementation, but filter the extra events
292            // out here so they don't cause havoc downstream.
293            if (timestamp == mLastHwVSync[disp]) {
294                ALOGW("Ignoring duplicate VSYNC event from HWC (t=%lld)",
295                        timestamp);
296                return;
297            }
298
299            mLastHwVSync[disp] = timestamp;
300        }
301
302        char tag[16];
303        snprintf(tag, sizeof(tag), "HW_VSYNC_%1u", disp);
304        ATRACE_INT(tag, ++mVSyncCounts[disp] & 1);
305
306        mEventHandler.onVSyncReceived(disp, timestamp);
307    }
308}
309
310void HWComposer::hotplug(int disp, int connected) {
311    if (disp == HWC_DISPLAY_PRIMARY || disp >= VIRTUAL_DISPLAY_ID_BASE) {
312        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
313                disp, connected);
314        return;
315    }
316    queryDisplayProperties(disp);
317    mEventHandler.onHotplugReceived(disp, bool(connected));
318}
319
320static float getDefaultDensity(uint32_t height) {
321    if (height >= 1080) return ACONFIGURATION_DENSITY_XHIGH;
322    else                return ACONFIGURATION_DENSITY_TV;
323}
324
325static const uint32_t DISPLAY_ATTRIBUTES[] = {
326    HWC_DISPLAY_VSYNC_PERIOD,
327    HWC_DISPLAY_WIDTH,
328    HWC_DISPLAY_HEIGHT,
329    HWC_DISPLAY_DPI_X,
330    HWC_DISPLAY_DPI_Y,
331    HWC_DISPLAY_NO_ATTRIBUTE,
332};
333#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
334
335status_t HWComposer::queryDisplayProperties(int disp) {
336
337    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
338
339    // use zero as default value for unspecified attributes
340    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
341    memset(values, 0, sizeof(values));
342
343    uint32_t config;
344    size_t numConfigs = 1;
345    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
346    if (err != NO_ERROR) {
347        // this can happen if an unpluggable display is not connected
348        mDisplayData[disp].connected = false;
349        return err;
350    }
351
352    err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
353    if (err != NO_ERROR) {
354        // we can't get this display's info. turn it off.
355        mDisplayData[disp].connected = false;
356        return err;
357    }
358
359    int32_t w = 0, h = 0;
360    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
361        switch (DISPLAY_ATTRIBUTES[i]) {
362        case HWC_DISPLAY_VSYNC_PERIOD:
363            mDisplayData[disp].refresh = nsecs_t(values[i]);
364            break;
365        case HWC_DISPLAY_WIDTH:
366            mDisplayData[disp].width = values[i];
367            break;
368        case HWC_DISPLAY_HEIGHT:
369            mDisplayData[disp].height = values[i];
370            break;
371        case HWC_DISPLAY_DPI_X:
372            mDisplayData[disp].xdpi = values[i] / 1000.0f;
373            break;
374        case HWC_DISPLAY_DPI_Y:
375            mDisplayData[disp].ydpi = values[i] / 1000.0f;
376            break;
377        default:
378            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
379                    i, DISPLAY_ATTRIBUTES[i]);
380            break;
381        }
382    }
383
384    // FIXME: what should we set the format to?
385    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
386    mDisplayData[disp].connected = true;
387    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
388        float dpi = getDefaultDensity(h);
389        mDisplayData[disp].xdpi = dpi;
390        mDisplayData[disp].ydpi = dpi;
391    }
392    return NO_ERROR;
393}
394
395status_t HWComposer::setVirtualDisplayProperties(int32_t id,
396        uint32_t w, uint32_t h, uint32_t format) {
397    if (id < VIRTUAL_DISPLAY_ID_BASE || id >= int32_t(mNumDisplays) ||
398            !mAllocatedDisplayIDs.hasBit(id)) {
399        return BAD_INDEX;
400    }
401    mDisplayData[id].width = w;
402    mDisplayData[id].height = h;
403    mDisplayData[id].format = format;
404    mDisplayData[id].xdpi = mDisplayData[id].ydpi = getDefaultDensity(h);
405    return NO_ERROR;
406}
407
408int32_t HWComposer::allocateDisplayId() {
409    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
410        return NO_MEMORY;
411    }
412    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
413    mAllocatedDisplayIDs.markBit(id);
414    mDisplayData[id].connected = true;
415    return id;
416}
417
418status_t HWComposer::freeDisplayId(int32_t id) {
419    if (id < NUM_BUILTIN_DISPLAYS) {
420        // cannot free the reserved IDs
421        return BAD_VALUE;
422    }
423    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
424        return BAD_INDEX;
425    }
426    mAllocatedDisplayIDs.clearBit(id);
427    mDisplayData[id].connected = false;
428    return NO_ERROR;
429}
430
431nsecs_t HWComposer::getRefreshPeriod(int disp) const {
432    return mDisplayData[disp].refresh;
433}
434
435nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
436    // this returns the last refresh timestamp.
437    // if the last one is not available, we estimate it based on
438    // the refresh period and whatever closest timestamp we have.
439    Mutex::Autolock _l(mLock);
440    nsecs_t now = systemTime(CLOCK_MONOTONIC);
441    return now - ((now - mLastHwVSync[disp]) %  mDisplayData[disp].refresh);
442}
443
444sp<Fence> HWComposer::getDisplayFence(int disp) const {
445    return mDisplayData[disp].lastDisplayFence;
446}
447
448uint32_t HWComposer::getWidth(int disp) const {
449    return mDisplayData[disp].width;
450}
451
452uint32_t HWComposer::getHeight(int disp) const {
453    return mDisplayData[disp].height;
454}
455
456uint32_t HWComposer::getFormat(int disp) const {
457    return mDisplayData[disp].format;
458}
459
460float HWComposer::getDpiX(int disp) const {
461    return mDisplayData[disp].xdpi;
462}
463
464float HWComposer::getDpiY(int disp) const {
465    return mDisplayData[disp].ydpi;
466}
467
468bool HWComposer::isConnected(int disp) const {
469    return mDisplayData[disp].connected;
470}
471
472void HWComposer::eventControl(int disp, int event, int enabled) {
473    if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
474        ALOGD("eventControl ignoring event %d on unallocated disp %d (en=%d)",
475              event, disp, enabled);
476        return;
477    }
478    if (event != EVENT_VSYNC) {
479        ALOGW("eventControl got unexpected event %d (disp=%d en=%d)",
480              event, disp, enabled);
481        return;
482    }
483    status_t err = NO_ERROR;
484    if (mHwc && !mDebugForceFakeVSync) {
485        // NOTE: we use our own internal lock here because we have to call
486        // into the HWC with the lock held, and we want to make sure
487        // that even if HWC blocks (which it shouldn't), it won't
488        // affect other threads.
489        Mutex::Autolock _l(mEventControlLock);
490        const int32_t eventBit = 1UL << event;
491        const int32_t newValue = enabled ? eventBit : 0;
492        const int32_t oldValue = mDisplayData[disp].events & eventBit;
493        if (newValue != oldValue) {
494            ATRACE_CALL();
495            err = mHwc->eventControl(mHwc, disp, event, enabled);
496            if (!err) {
497                int32_t& events(mDisplayData[disp].events);
498                events = (events & ~eventBit) | newValue;
499            }
500        }
501        // error here should not happen -- not sure what we should
502        // do if it does.
503        ALOGE_IF(err, "eventControl(%d, %d) failed %s",
504                event, enabled, strerror(-err));
505    }
506
507    if (err == NO_ERROR && mVSyncThread != NULL) {
508        mVSyncThread->setEnabled(enabled);
509    }
510}
511
512status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
513    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
514        return BAD_INDEX;
515    }
516
517    if (mHwc) {
518        DisplayData& disp(mDisplayData[id]);
519        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
520            // we need space for the HWC_FRAMEBUFFER_TARGET
521            numLayers++;
522        }
523        if (disp.capacity < numLayers || disp.list == NULL) {
524            size_t size = sizeof(hwc_display_contents_1_t)
525                    + numLayers * sizeof(hwc_layer_1_t);
526            free(disp.list);
527            disp.list = (hwc_display_contents_1_t*)malloc(size);
528            disp.capacity = numLayers;
529        }
530        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
531            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
532            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
533            const hwc_rect_t r = { 0, 0, (int) disp.width, (int) disp.height };
534            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
535            disp.framebufferTarget->hints = 0;
536            disp.framebufferTarget->flags = 0;
537            disp.framebufferTarget->handle = disp.fbTargetHandle;
538            disp.framebufferTarget->transform = 0;
539            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
540            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
541                disp.framebufferTarget->sourceCropf.left = 0;
542                disp.framebufferTarget->sourceCropf.top = 0;
543                disp.framebufferTarget->sourceCropf.right = disp.width;
544                disp.framebufferTarget->sourceCropf.bottom = disp.height;
545            } else {
546                disp.framebufferTarget->sourceCrop = r;
547            }
548            disp.framebufferTarget->displayFrame = r;
549            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
550            disp.framebufferTarget->visibleRegionScreen.rects =
551                &disp.framebufferTarget->displayFrame;
552            disp.framebufferTarget->acquireFenceFd = -1;
553            disp.framebufferTarget->releaseFenceFd = -1;
554            disp.framebufferTarget->planeAlpha = 0xFF;
555        }
556        disp.list->retireFenceFd = -1;
557        disp.list->flags = HWC_GEOMETRY_CHANGED;
558        disp.list->numHwLayers = numLayers;
559    }
560    return NO_ERROR;
561}
562
563status_t HWComposer::setFramebufferTarget(int32_t id,
564        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
565    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
566        return BAD_INDEX;
567    }
568    DisplayData& disp(mDisplayData[id]);
569    if (!disp.framebufferTarget) {
570        // this should never happen, but apparently eglCreateWindowSurface()
571        // triggers a Surface::queueBuffer()  on some
572        // devices (!?) -- log and ignore.
573        ALOGE("HWComposer: framebufferTarget is null");
574        return NO_ERROR;
575    }
576
577    int acquireFenceFd = -1;
578    if (acquireFence->isValid()) {
579        acquireFenceFd = acquireFence->dup();
580    }
581
582    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
583    disp.fbTargetHandle = buf->handle;
584    disp.framebufferTarget->handle = disp.fbTargetHandle;
585    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
586    return NO_ERROR;
587}
588
589status_t HWComposer::prepare() {
590    for (size_t i=0 ; i<mNumDisplays ; i++) {
591        DisplayData& disp(mDisplayData[i]);
592        if (disp.framebufferTarget) {
593            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
594            // DO NOT reset the handle field to NULL, because it's possible
595            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
596            // in which case, we should continue to use the same buffer.
597            LOG_FATAL_IF(disp.list == NULL);
598            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
599        }
600        if (!disp.connected && disp.list != NULL) {
601            ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
602                  i, disp.list->numHwLayers);
603        }
604        mLists[i] = disp.list;
605        if (mLists[i]) {
606            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
607                mLists[i]->outbuf = NULL;
608                mLists[i]->outbufAcquireFenceFd = -1;
609            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
610                // garbage data to catch improper use
611                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
612                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
613            } else {
614                mLists[i]->dpy = EGL_NO_DISPLAY;
615                mLists[i]->sur = EGL_NO_SURFACE;
616            }
617        }
618    }
619
620    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
621    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
622
623    if (err == NO_ERROR) {
624        // here we're just making sure that "skip" layers are set
625        // to HWC_FRAMEBUFFER and we're also counting how many layers
626        // we have of each type.
627        //
628        // If there are no window layers, we treat the display has having FB
629        // composition, because SurfaceFlinger will use GLES to draw the
630        // wormhole region.
631        for (size_t i=0 ; i<mNumDisplays ; i++) {
632            DisplayData& disp(mDisplayData[i]);
633            disp.hasFbComp = false;
634            disp.hasOvComp = false;
635            if (disp.list) {
636                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
637                    hwc_layer_1_t& l = disp.list->hwLayers[i];
638
639                    //ALOGD("prepare: %d, type=%d, handle=%p",
640                    //        i, l.compositionType, l.handle);
641
642                    if (l.flags & HWC_SKIP_LAYER) {
643                        l.compositionType = HWC_FRAMEBUFFER;
644                    }
645                    if (l.compositionType == HWC_FRAMEBUFFER) {
646                        disp.hasFbComp = true;
647                    }
648                    if (l.compositionType == HWC_OVERLAY) {
649                        disp.hasOvComp = true;
650                    }
651                }
652                if (disp.list->numHwLayers == (disp.framebufferTarget ? 1 : 0)) {
653                    disp.hasFbComp = true;
654                }
655            } else {
656                disp.hasFbComp = true;
657            }
658        }
659    }
660    return (status_t)err;
661}
662
663bool HWComposer::hasHwcComposition(int32_t id) const {
664    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
665        return false;
666    return mDisplayData[id].hasOvComp;
667}
668
669bool HWComposer::hasGlesComposition(int32_t id) const {
670    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
671        return true;
672    return mDisplayData[id].hasFbComp;
673}
674
675sp<Fence> HWComposer::getAndResetReleaseFence(int32_t id) {
676    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
677        return Fence::NO_FENCE;
678
679    int fd = INVALID_OPERATION;
680    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
681        const DisplayData& disp(mDisplayData[id]);
682        if (disp.framebufferTarget) {
683            fd = disp.framebufferTarget->releaseFenceFd;
684            disp.framebufferTarget->acquireFenceFd = -1;
685            disp.framebufferTarget->releaseFenceFd = -1;
686        }
687    }
688    return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
689}
690
691status_t HWComposer::commit() {
692    int err = NO_ERROR;
693    if (mHwc) {
694        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
695            // On version 1.0, the OpenGL ES target surface is communicated
696            // by the (dpy, sur) fields and we are guaranteed to have only
697            // a single display.
698            mLists[0]->dpy = eglGetCurrentDisplay();
699            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
700        }
701
702        for (size_t i=VIRTUAL_DISPLAY_ID_BASE; i<mNumDisplays; i++) {
703            DisplayData& disp(mDisplayData[i]);
704            if (disp.outbufHandle) {
705                mLists[i]->outbuf = disp.outbufHandle;
706                mLists[i]->outbufAcquireFenceFd =
707                        disp.outbufAcquireFence->dup();
708            }
709        }
710
711        err = mHwc->set(mHwc, mNumDisplays, mLists);
712
713        for (size_t i=0 ; i<mNumDisplays ; i++) {
714            DisplayData& disp(mDisplayData[i]);
715            disp.lastDisplayFence = disp.lastRetireFence;
716            disp.lastRetireFence = Fence::NO_FENCE;
717            if (disp.list) {
718                if (disp.list->retireFenceFd != -1) {
719                    disp.lastRetireFence = new Fence(disp.list->retireFenceFd);
720                    disp.list->retireFenceFd = -1;
721                }
722                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
723            }
724        }
725    }
726    return (status_t)err;
727}
728
729status_t HWComposer::release(int disp) {
730    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
731    if (mHwc) {
732        eventControl(disp, HWC_EVENT_VSYNC, 0);
733        return (status_t)mHwc->blank(mHwc, disp, 1);
734    }
735    return NO_ERROR;
736}
737
738status_t HWComposer::acquire(int disp) {
739    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
740    if (mHwc) {
741        return (status_t)mHwc->blank(mHwc, disp, 0);
742    }
743    return NO_ERROR;
744}
745
746void HWComposer::disconnectDisplay(int disp) {
747    LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY);
748    DisplayData& dd(mDisplayData[disp]);
749    free(dd.list);
750    dd.list = NULL;
751    dd.framebufferTarget = NULL;    // points into dd.list
752    dd.fbTargetHandle = NULL;
753    dd.outbufHandle = NULL;
754    dd.lastRetireFence = Fence::NO_FENCE;
755    dd.lastDisplayFence = Fence::NO_FENCE;
756    dd.outbufAcquireFence = Fence::NO_FENCE;
757}
758
759int HWComposer::getVisualID() const {
760    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
761        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
762        // is supported by the implementation. we can only be in this case
763        // if we have HWC 1.1
764        return HAL_PIXEL_FORMAT_RGBA_8888;
765        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
766    } else {
767        return mFbDev->format;
768    }
769}
770
771bool HWComposer::supportsFramebufferTarget() const {
772    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
773}
774
775int HWComposer::fbPost(int32_t id,
776        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
777    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
778        return setFramebufferTarget(id, acquireFence, buffer);
779    } else {
780        acquireFence->waitForever("HWComposer::fbPost");
781        return mFbDev->post(mFbDev, buffer->handle);
782    }
783}
784
785int HWComposer::fbCompositionComplete() {
786    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
787        return NO_ERROR;
788
789    if (mFbDev->compositionComplete) {
790        return mFbDev->compositionComplete(mFbDev);
791    } else {
792        return INVALID_OPERATION;
793    }
794}
795
796void HWComposer::fbDump(String8& result) {
797    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
798        const size_t SIZE = 4096;
799        char buffer[SIZE];
800        mFbDev->dump(mFbDev, buffer, SIZE);
801        result.append(buffer);
802    }
803}
804
805status_t HWComposer::setOutputBuffer(int32_t id, const sp<Fence>& acquireFence,
806        const sp<GraphicBuffer>& buf) {
807    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
808        return BAD_INDEX;
809    if (id < VIRTUAL_DISPLAY_ID_BASE)
810        return INVALID_OPERATION;
811
812    DisplayData& disp(mDisplayData[id]);
813    disp.outbufHandle = buf->handle;
814    disp.outbufAcquireFence = acquireFence;
815    return NO_ERROR;
816}
817
818sp<Fence> HWComposer::getLastRetireFence(int32_t id) {
819    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
820        return Fence::NO_FENCE;
821    return mDisplayData[id].lastRetireFence;
822}
823
824/*
825 * Helper template to implement a concrete HWCLayer
826 * This holds the pointer to the concrete hwc layer type
827 * and implements the "iterable" side of HWCLayer.
828 */
829template<typename CONCRETE, typename HWCTYPE>
830class Iterable : public HWComposer::HWCLayer {
831protected:
832    HWCTYPE* const mLayerList;
833    HWCTYPE* mCurrentLayer;
834    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
835    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
836    inline HWCTYPE* getLayer() { return mCurrentLayer; }
837    virtual ~Iterable() { }
838private:
839    // returns a copy of ourselves
840    virtual HWComposer::HWCLayer* dup() {
841        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
842    }
843    virtual status_t setLayer(size_t index) {
844        mCurrentLayer = &mLayerList[index];
845        return NO_ERROR;
846    }
847};
848
849/*
850 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
851 * This implements the HWCLayer side of HWCIterableLayer.
852 */
853class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
854    struct hwc_composer_device_1* mHwc;
855public:
856    HWCLayerVersion1(struct hwc_composer_device_1* hwc, hwc_layer_1_t* layer)
857        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer), mHwc(hwc) { }
858
859    virtual int32_t getCompositionType() const {
860        return getLayer()->compositionType;
861    }
862    virtual uint32_t getHints() const {
863        return getLayer()->hints;
864    }
865    virtual sp<Fence> getAndResetReleaseFence() {
866        int fd = getLayer()->releaseFenceFd;
867        getLayer()->releaseFenceFd = -1;
868        return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
869    }
870    virtual void setAcquireFenceFd(int fenceFd) {
871        getLayer()->acquireFenceFd = fenceFd;
872    }
873    virtual void setPerFrameDefaultState() {
874        //getLayer()->compositionType = HWC_FRAMEBUFFER;
875    }
876    virtual void setPlaneAlpha(uint8_t alpha) {
877        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
878            getLayer()->planeAlpha = alpha;
879        } else {
880            if (alpha < 0xFF) {
881                getLayer()->flags |= HWC_SKIP_LAYER;
882            }
883        }
884    }
885    virtual void setDefaultState() {
886        hwc_layer_1_t* const l = getLayer();
887        l->compositionType = HWC_FRAMEBUFFER;
888        l->hints = 0;
889        l->flags = HWC_SKIP_LAYER;
890        l->handle = 0;
891        l->transform = 0;
892        l->blending = HWC_BLENDING_NONE;
893        l->visibleRegionScreen.numRects = 0;
894        l->visibleRegionScreen.rects = NULL;
895        l->acquireFenceFd = -1;
896        l->releaseFenceFd = -1;
897        l->planeAlpha = 0xFF;
898    }
899    virtual void setSkip(bool skip) {
900        if (skip) {
901            getLayer()->flags |= HWC_SKIP_LAYER;
902        } else {
903            getLayer()->flags &= ~HWC_SKIP_LAYER;
904        }
905    }
906    virtual void setBlending(uint32_t blending) {
907        getLayer()->blending = blending;
908    }
909    virtual void setTransform(uint32_t transform) {
910        getLayer()->transform = transform;
911    }
912    virtual void setFrame(const Rect& frame) {
913        getLayer()->displayFrame = reinterpret_cast<hwc_rect_t const&>(frame);
914    }
915    virtual void setCrop(const FloatRect& crop) {
916        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
917            getLayer()->sourceCropf = reinterpret_cast<hwc_frect_t const&>(crop);
918        } else {
919            /*
920             * Since h/w composer didn't support a flot crop rect before version 1.3,
921             * using integer coordinates instead produces a different output from the GL code in
922             * Layer::drawWithOpenGL(). The difference can be large if the buffer crop to
923             * window size ratio is large and a window crop is defined
924             * (i.e.: if we scale the buffer a lot and we also crop it with a window crop).
925             */
926            hwc_rect_t& r = getLayer()->sourceCrop;
927            r.left  = int(ceilf(crop.left));
928            r.top   = int(ceilf(crop.top));
929            r.right = int(floorf(crop.right));
930            r.bottom= int(floorf(crop.bottom));
931        }
932    }
933    virtual void setVisibleRegionScreen(const Region& reg) {
934        // Region::getSharedBuffer creates a reference to the underlying
935        // SharedBuffer of this Region, this reference is freed
936        // in onDisplayed()
937        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
938        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
939        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
940    }
941    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
942        if (buffer == 0 || buffer->handle == 0) {
943            getLayer()->compositionType = HWC_FRAMEBUFFER;
944            getLayer()->flags |= HWC_SKIP_LAYER;
945            getLayer()->handle = 0;
946        } else {
947            getLayer()->handle = buffer->handle;
948        }
949    }
950    virtual void onDisplayed() {
951        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
952        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
953        if (sb) {
954            sb->release();
955            // not technically needed but safer
956            visibleRegion.numRects = 0;
957            visibleRegion.rects = NULL;
958        }
959
960        getLayer()->acquireFenceFd = -1;
961    }
962};
963
964/*
965 * returns an iterator initialized at a given index in the layer list
966 */
967HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
968    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
969        return LayerListIterator();
970    }
971    const DisplayData& disp(mDisplayData[id]);
972    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
973        return LayerListIterator();
974    }
975    return LayerListIterator(new HWCLayerVersion1(mHwc, disp.list->hwLayers), index);
976}
977
978/*
979 * returns an iterator on the beginning of the layer list
980 */
981HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
982    return getLayerIterator(id, 0);
983}
984
985/*
986 * returns an iterator on the end of the layer list
987 */
988HWComposer::LayerListIterator HWComposer::end(int32_t id) {
989    size_t numLayers = 0;
990    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
991        const DisplayData& disp(mDisplayData[id]);
992        if (mHwc && disp.list) {
993            numLayers = disp.list->numHwLayers;
994            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
995                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
996                // which we ignore when iterating through the layer list.
997                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
998                if (numLayers) {
999                    numLayers--;
1000                }
1001            }
1002        }
1003    }
1004    return getLayerIterator(id, numLayers);
1005}
1006
1007void HWComposer::dump(String8& result) const {
1008    if (mHwc) {
1009        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
1010        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
1011        for (size_t i=0 ; i<mNumDisplays ; i++) {
1012            const DisplayData& disp(mDisplayData[i]);
1013            if (!disp.connected)
1014                continue;
1015
1016            const Vector< sp<Layer> >& visibleLayersSortedByZ =
1017                    mFlinger->getLayerSortedByZForHwcDisplay(i);
1018
1019            result.appendFormat(
1020                    "  Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
1021                    i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
1022
1023            if (disp.list) {
1024                result.appendFormat(
1025                        "  numHwLayers=%u, flags=%08x\n",
1026                        disp.list->numHwLayers, disp.list->flags);
1027
1028                result.append(
1029                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |          source crop            |           frame           name \n"
1030                        "------------+----------+----------+----------+----+-------+----------+---------------------------------+--------------------------------\n");
1031                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____._,_____._,_____._,_____._] | [_____,_____,_____,_____]
1032                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
1033                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
1034                    int32_t format = -1;
1035                    String8 name("unknown");
1036
1037                    if (i < visibleLayersSortedByZ.size()) {
1038                        const sp<Layer>& layer(visibleLayersSortedByZ[i]);
1039                        const sp<GraphicBuffer>& buffer(
1040                                layer->getActiveBuffer());
1041                        if (buffer != NULL) {
1042                            format = buffer->getPixelFormat();
1043                        }
1044                        name = layer->getName();
1045                    }
1046
1047                    int type = l.compositionType;
1048                    if (type == HWC_FRAMEBUFFER_TARGET) {
1049                        name = "HWC_FRAMEBUFFER_TARGET";
1050                        format = disp.format;
1051                    }
1052
1053                    static char const* compositionTypeName[] = {
1054                            "GLES",
1055                            "HWC",
1056                            "BACKGROUND",
1057                            "FB TARGET",
1058                            "UNKNOWN"};
1059                    if (type >= NELEM(compositionTypeName))
1060                        type = NELEM(compositionTypeName) - 1;
1061
1062                    if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
1063                        result.appendFormat(
1064                                " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7.1f,%7.1f,%7.1f,%7.1f] | [%5d,%5d,%5d,%5d] %s\n",
1065                                        compositionTypeName[type],
1066                                        intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1067                                        l.sourceCropf.left, l.sourceCropf.top, l.sourceCropf.right, l.sourceCropf.bottom,
1068                                        l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1069                                        name.string());
1070                    } else {
1071                        result.appendFormat(
1072                                " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7d,%7d,%7d,%7d] | [%5d,%5d,%5d,%5d] %s\n",
1073                                        compositionTypeName[type],
1074                                        intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1075                                        l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
1076                                        l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1077                                        name.string());
1078                    }
1079                }
1080            }
1081        }
1082    }
1083
1084    if (mHwc && mHwc->dump) {
1085        const size_t SIZE = 4096;
1086        char buffer[SIZE];
1087        mHwc->dump(mHwc, buffer, SIZE);
1088        result.append(buffer);
1089    }
1090}
1091
1092// ---------------------------------------------------------------------------
1093
1094HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
1095    : mHwc(hwc), mEnabled(false),
1096      mNextFakeVSync(0),
1097      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
1098{
1099}
1100
1101void HWComposer::VSyncThread::setEnabled(bool enabled) {
1102    Mutex::Autolock _l(mLock);
1103    if (mEnabled != enabled) {
1104        mEnabled = enabled;
1105        mCondition.signal();
1106    }
1107}
1108
1109void HWComposer::VSyncThread::onFirstRef() {
1110    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
1111}
1112
1113bool HWComposer::VSyncThread::threadLoop() {
1114    { // scope for lock
1115        Mutex::Autolock _l(mLock);
1116        while (!mEnabled) {
1117            mCondition.wait(mLock);
1118        }
1119    }
1120
1121    const nsecs_t period = mRefreshPeriod;
1122    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
1123    nsecs_t next_vsync = mNextFakeVSync;
1124    nsecs_t sleep = next_vsync - now;
1125    if (sleep < 0) {
1126        // we missed, find where the next vsync should be
1127        sleep = (period - ((now - next_vsync) % period));
1128        next_vsync = now + sleep;
1129    }
1130    mNextFakeVSync = next_vsync + period;
1131
1132    struct timespec spec;
1133    spec.tv_sec  = next_vsync / 1000000000;
1134    spec.tv_nsec = next_vsync % 1000000000;
1135
1136    int err;
1137    do {
1138        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1139    } while (err<0 && errno == EINTR);
1140
1141    if (err == 0) {
1142        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1143    }
1144
1145    return true;
1146}
1147
1148HWComposer::DisplayData::DisplayData()
1149:   width(0), height(0), format(0),
1150    xdpi(0.0f), ydpi(0.0f),
1151    refresh(0),
1152    connected(false),
1153    hasFbComp(false), hasOvComp(false),
1154    capacity(0), list(NULL),
1155    framebufferTarget(NULL), fbTargetHandle(0),
1156    lastRetireFence(Fence::NO_FENCE), lastDisplayFence(Fence::NO_FENCE),
1157    outbufHandle(NULL), outbufAcquireFence(Fence::NO_FENCE),
1158    events(0)
1159{}
1160
1161HWComposer::DisplayData::~DisplayData() {
1162    free(list);
1163}
1164
1165// ---------------------------------------------------------------------------
1166}; // namespace android
1167