HWComposer.cpp revision 9e663de4fe1dcc872373ee530c60a375624671c3 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19#include <stdint.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/types.h>
24#include <math.h>
25
26#include <utils/CallStack.h>
27#include <utils/Errors.h>
28#include <utils/misc.h>
29#include <utils/String8.h>
30#include <utils/Thread.h>
31#include <utils/Trace.h>
32#include <utils/Vector.h>
33
34#include <ui/GraphicBuffer.h>
35
36#include <hardware/hardware.h>
37#include <hardware/hwcomposer.h>
38
39#include <android/configuration.h>
40
41#include <cutils/log.h>
42#include <cutils/properties.h>
43
44#include "HWComposer.h"
45
46#include "../Layer.h"           // needed only for debugging
47#include "../SurfaceFlinger.h"
48
49namespace android {
50
51#define MIN_HWC_HEADER_VERSION HWC_HEADER_VERSION
52
53static uint32_t hwcApiVersion(const hwc_composer_device_1_t* hwc) {
54    uint32_t hwcVersion = hwc->common.version;
55    return hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK;
56}
57
58static uint32_t hwcHeaderVersion(const hwc_composer_device_1_t* hwc) {
59    uint32_t hwcVersion = hwc->common.version;
60    return hwcVersion & HARDWARE_API_VERSION_2_HEADER_MASK;
61}
62
63static bool hwcHasApiVersion(const hwc_composer_device_1_t* hwc,
64        uint32_t version) {
65    return hwcApiVersion(hwc) >= (version & HARDWARE_API_VERSION_2_MAJ_MIN_MASK);
66}
67
68// ---------------------------------------------------------------------------
69
70struct HWComposer::cb_context {
71    struct callbacks : public hwc_procs_t {
72        // these are here to facilitate the transition when adding
73        // new callbacks (an implementation can check for NULL before
74        // calling a new callback).
75        void (*zero[4])(void);
76    };
77    callbacks procs;
78    HWComposer* hwc;
79};
80
81// ---------------------------------------------------------------------------
82
83HWComposer::HWComposer(
84        const sp<SurfaceFlinger>& flinger,
85        EventHandler& handler)
86    : mFlinger(flinger),
87      mFbDev(0), mHwc(0), mNumDisplays(1),
88      mCBContext(new cb_context),
89      mEventHandler(handler),
90      mVSyncCount(0), mDebugForceFakeVSync(false)
91{
92    for (size_t i =0 ; i<MAX_HWC_DISPLAYS ; i++) {
93        mLists[i] = 0;
94    }
95
96    char value[PROPERTY_VALUE_MAX];
97    property_get("debug.sf.no_hw_vsync", value, "0");
98    mDebugForceFakeVSync = atoi(value);
99
100    bool needVSyncThread = true;
101
102    // Note: some devices may insist that the FB HAL be opened before HWC.
103    int fberr = loadFbHalModule();
104    loadHwcModule();
105
106    if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
107        // close FB HAL if we don't needed it.
108        // FIXME: this is temporary until we're not forced to open FB HAL
109        // before HWC.
110        framebuffer_close(mFbDev);
111        mFbDev = NULL;
112    }
113
114    // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
115    if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
116            && !mFbDev) {
117        ALOGE("ERROR: failed to open framebuffer (%s), aborting",
118                strerror(-fberr));
119        abort();
120    }
121
122    // these display IDs are always reserved
123    for (size_t i=0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
124        mAllocatedDisplayIDs.markBit(i);
125    }
126
127    if (mHwc) {
128        ALOGI("Using %s version %u.%u", HWC_HARDWARE_COMPOSER,
129              (hwcApiVersion(mHwc) >> 24) & 0xff,
130              (hwcApiVersion(mHwc) >> 16) & 0xff);
131        if (mHwc->registerProcs) {
132            mCBContext->hwc = this;
133            mCBContext->procs.invalidate = &hook_invalidate;
134            mCBContext->procs.vsync = &hook_vsync;
135            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
136                mCBContext->procs.hotplug = &hook_hotplug;
137            else
138                mCBContext->procs.hotplug = NULL;
139            memset(mCBContext->procs.zero, 0, sizeof(mCBContext->procs.zero));
140            mHwc->registerProcs(mHwc, &mCBContext->procs);
141        }
142
143        // don't need a vsync thread if we have a hardware composer
144        needVSyncThread = false;
145        // always turn vsync off when we start
146        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
147
148        // the number of displays we actually have depends on the
149        // hw composer version
150        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
151            // 1.3 adds support for virtual displays
152            mNumDisplays = MAX_HWC_DISPLAYS;
153        } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
154            // 1.1 adds support for multiple displays
155            mNumDisplays = NUM_BUILTIN_DISPLAYS;
156        } else {
157            mNumDisplays = 1;
158        }
159    }
160
161    if (mFbDev) {
162        ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
163                "should only have fbdev if no hwc or hwc is 1.0");
164
165        DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
166        disp.connected = true;
167        disp.width = mFbDev->width;
168        disp.height = mFbDev->height;
169        disp.format = mFbDev->format;
170        disp.xdpi = mFbDev->xdpi;
171        disp.ydpi = mFbDev->ydpi;
172        if (disp.refresh == 0) {
173            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
174            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
175        }
176        if (disp.refresh == 0) {
177            disp.refresh = nsecs_t(1e9 / 60.0);
178            ALOGW("getting VSYNC period from thin air: %lld",
179                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
180        }
181    } else if (mHwc) {
182        // here we're guaranteed to have at least HWC 1.1
183        for (size_t i =0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
184            queryDisplayProperties(i);
185        }
186    }
187
188    if (needVSyncThread) {
189        // we don't have VSYNC support, we need to fake it
190        mVSyncThread = new VSyncThread(*this);
191    }
192}
193
194HWComposer::~HWComposer() {
195    if (mHwc) {
196        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
197    }
198    if (mVSyncThread != NULL) {
199        mVSyncThread->requestExitAndWait();
200    }
201    if (mHwc) {
202        hwc_close_1(mHwc);
203    }
204    if (mFbDev) {
205        framebuffer_close(mFbDev);
206    }
207    delete mCBContext;
208}
209
210// Load and prepare the hardware composer module.  Sets mHwc.
211void HWComposer::loadHwcModule()
212{
213    hw_module_t const* module;
214
215    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
216        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
217        return;
218    }
219
220    int err = hwc_open_1(module, &mHwc);
221    if (err) {
222        ALOGE("%s device failed to initialize (%s)",
223              HWC_HARDWARE_COMPOSER, strerror(-err));
224        return;
225    }
226
227    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
228            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
229            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
230        ALOGE("%s device version %#x unsupported, will not be used",
231              HWC_HARDWARE_COMPOSER, mHwc->common.version);
232        hwc_close_1(mHwc);
233        mHwc = NULL;
234        return;
235    }
236}
237
238// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
239int HWComposer::loadFbHalModule()
240{
241    hw_module_t const* module;
242
243    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
244    if (err != 0) {
245        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
246        return err;
247    }
248
249    return framebuffer_open(module, &mFbDev);
250}
251
252status_t HWComposer::initCheck() const {
253    return mHwc ? NO_ERROR : NO_INIT;
254}
255
256void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
257    cb_context* ctx = reinterpret_cast<cb_context*>(
258            const_cast<hwc_procs_t*>(procs));
259    ctx->hwc->invalidate();
260}
261
262void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
263        int64_t timestamp) {
264    cb_context* ctx = reinterpret_cast<cb_context*>(
265            const_cast<hwc_procs_t*>(procs));
266    ctx->hwc->vsync(disp, timestamp);
267}
268
269void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
270        int connected) {
271    cb_context* ctx = reinterpret_cast<cb_context*>(
272            const_cast<hwc_procs_t*>(procs));
273    ctx->hwc->hotplug(disp, connected);
274}
275
276void HWComposer::invalidate() {
277    mFlinger->repaintEverything();
278}
279
280void HWComposer::vsync(int disp, int64_t timestamp) {
281    ATRACE_INT("VSYNC", ++mVSyncCount&1);
282    mEventHandler.onVSyncReceived(disp, timestamp);
283    Mutex::Autolock _l(mLock);
284    mLastHwVSync = timestamp;
285}
286
287void HWComposer::hotplug(int disp, int connected) {
288    if (disp == HWC_DISPLAY_PRIMARY || disp >= VIRTUAL_DISPLAY_ID_BASE) {
289        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
290                disp, connected);
291        return;
292    }
293    queryDisplayProperties(disp);
294    mEventHandler.onHotplugReceived(disp, bool(connected));
295}
296
297static float getDefaultDensity(uint32_t height) {
298    if (height >= 1080) return ACONFIGURATION_DENSITY_XHIGH;
299    else                return ACONFIGURATION_DENSITY_TV;
300}
301
302static const uint32_t DISPLAY_ATTRIBUTES[] = {
303    HWC_DISPLAY_VSYNC_PERIOD,
304    HWC_DISPLAY_WIDTH,
305    HWC_DISPLAY_HEIGHT,
306    HWC_DISPLAY_DPI_X,
307    HWC_DISPLAY_DPI_Y,
308    HWC_DISPLAY_NO_ATTRIBUTE,
309};
310#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
311
312status_t HWComposer::queryDisplayProperties(int disp) {
313
314    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
315
316    // use zero as default value for unspecified attributes
317    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
318    memset(values, 0, sizeof(values));
319
320    uint32_t config;
321    size_t numConfigs = 1;
322    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
323    if (err != NO_ERROR) {
324        // this can happen if an unpluggable display is not connected
325        mDisplayData[disp].connected = false;
326        return err;
327    }
328
329    err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
330    if (err != NO_ERROR) {
331        // we can't get this display's info. turn it off.
332        mDisplayData[disp].connected = false;
333        return err;
334    }
335
336    int32_t w = 0, h = 0;
337    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
338        switch (DISPLAY_ATTRIBUTES[i]) {
339        case HWC_DISPLAY_VSYNC_PERIOD:
340            mDisplayData[disp].refresh = nsecs_t(values[i]);
341            break;
342        case HWC_DISPLAY_WIDTH:
343            mDisplayData[disp].width = values[i];
344            break;
345        case HWC_DISPLAY_HEIGHT:
346            mDisplayData[disp].height = values[i];
347            break;
348        case HWC_DISPLAY_DPI_X:
349            mDisplayData[disp].xdpi = values[i] / 1000.0f;
350            break;
351        case HWC_DISPLAY_DPI_Y:
352            mDisplayData[disp].ydpi = values[i] / 1000.0f;
353            break;
354        default:
355            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
356                    i, DISPLAY_ATTRIBUTES[i]);
357            break;
358        }
359    }
360
361    // FIXME: what should we set the format to?
362    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
363    mDisplayData[disp].connected = true;
364    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
365        float dpi = getDefaultDensity(h);
366        mDisplayData[disp].xdpi = dpi;
367        mDisplayData[disp].ydpi = dpi;
368    }
369    return NO_ERROR;
370}
371
372status_t HWComposer::setVirtualDisplayProperties(int32_t id,
373        uint32_t w, uint32_t h, uint32_t format) {
374    if (id < VIRTUAL_DISPLAY_ID_BASE || id >= int32_t(mNumDisplays) ||
375            !mAllocatedDisplayIDs.hasBit(id)) {
376        return BAD_INDEX;
377    }
378    mDisplayData[id].width = w;
379    mDisplayData[id].height = h;
380    mDisplayData[id].format = format;
381    mDisplayData[id].xdpi = mDisplayData[id].ydpi = getDefaultDensity(h);
382    return NO_ERROR;
383}
384
385int32_t HWComposer::allocateDisplayId() {
386    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
387        return NO_MEMORY;
388    }
389    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
390    mAllocatedDisplayIDs.markBit(id);
391    mDisplayData[id].connected = true;
392    return id;
393}
394
395status_t HWComposer::freeDisplayId(int32_t id) {
396    if (id < NUM_BUILTIN_DISPLAYS) {
397        // cannot free the reserved IDs
398        return BAD_VALUE;
399    }
400    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
401        return BAD_INDEX;
402    }
403    mAllocatedDisplayIDs.clearBit(id);
404    mDisplayData[id].connected = false;
405    return NO_ERROR;
406}
407
408nsecs_t HWComposer::getRefreshPeriod(int disp) const {
409    return mDisplayData[disp].refresh;
410}
411
412nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
413    // this returns the last refresh timestamp.
414    // if the last one is not available, we estimate it based on
415    // the refresh period and whatever closest timestamp we have.
416    Mutex::Autolock _l(mLock);
417    nsecs_t now = systemTime(CLOCK_MONOTONIC);
418    return now - ((now - mLastHwVSync) %  mDisplayData[disp].refresh);
419}
420
421sp<Fence> HWComposer::getDisplayFence(int disp) const {
422    return mDisplayData[disp].lastDisplayFence;
423}
424
425uint32_t HWComposer::getWidth(int disp) const {
426    return mDisplayData[disp].width;
427}
428
429uint32_t HWComposer::getHeight(int disp) const {
430    return mDisplayData[disp].height;
431}
432
433uint32_t HWComposer::getFormat(int disp) const {
434    return mDisplayData[disp].format;
435}
436
437float HWComposer::getDpiX(int disp) const {
438    return mDisplayData[disp].xdpi;
439}
440
441float HWComposer::getDpiY(int disp) const {
442    return mDisplayData[disp].ydpi;
443}
444
445bool HWComposer::isConnected(int disp) const {
446    return mDisplayData[disp].connected;
447}
448
449void HWComposer::eventControl(int disp, int event, int enabled) {
450    if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
451        ALOGD("eventControl ignoring event %d on unallocated disp %d (en=%d)",
452              event, disp, enabled);
453        return;
454    }
455    if (event != EVENT_VSYNC) {
456        ALOGW("eventControl got unexpected event %d (disp=%d en=%d)",
457              event, disp, enabled);
458        return;
459    }
460    status_t err = NO_ERROR;
461    if (mHwc && !mDebugForceFakeVSync) {
462        // NOTE: we use our own internal lock here because we have to call
463        // into the HWC with the lock held, and we want to make sure
464        // that even if HWC blocks (which it shouldn't), it won't
465        // affect other threads.
466        Mutex::Autolock _l(mEventControlLock);
467        const int32_t eventBit = 1UL << event;
468        const int32_t newValue = enabled ? eventBit : 0;
469        const int32_t oldValue = mDisplayData[disp].events & eventBit;
470        if (newValue != oldValue) {
471            ATRACE_CALL();
472            err = mHwc->eventControl(mHwc, disp, event, enabled);
473            if (!err) {
474                int32_t& events(mDisplayData[disp].events);
475                events = (events & ~eventBit) | newValue;
476            }
477        }
478        // error here should not happen -- not sure what we should
479        // do if it does.
480        ALOGE_IF(err, "eventControl(%d, %d) failed %s",
481                event, enabled, strerror(-err));
482    }
483
484    if (err == NO_ERROR && mVSyncThread != NULL) {
485        mVSyncThread->setEnabled(enabled);
486    }
487}
488
489status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
490    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
491        return BAD_INDEX;
492    }
493
494    if (mHwc) {
495        DisplayData& disp(mDisplayData[id]);
496        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
497            // we need space for the HWC_FRAMEBUFFER_TARGET
498            numLayers++;
499        }
500        if (disp.capacity < numLayers || disp.list == NULL) {
501            size_t size = sizeof(hwc_display_contents_1_t)
502                    + numLayers * sizeof(hwc_layer_1_t);
503            free(disp.list);
504            disp.list = (hwc_display_contents_1_t*)malloc(size);
505            disp.capacity = numLayers;
506        }
507        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
508            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
509            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
510            const hwc_rect_t r = { 0, 0, (int) disp.width, (int) disp.height };
511            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
512            disp.framebufferTarget->hints = 0;
513            disp.framebufferTarget->flags = 0;
514            disp.framebufferTarget->handle = disp.fbTargetHandle;
515            disp.framebufferTarget->transform = 0;
516            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
517            disp.framebufferTarget->sourceCrop = r;
518            disp.framebufferTarget->displayFrame = r;
519            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
520            disp.framebufferTarget->visibleRegionScreen.rects =
521                &disp.framebufferTarget->displayFrame;
522            disp.framebufferTarget->acquireFenceFd = -1;
523            disp.framebufferTarget->releaseFenceFd = -1;
524            disp.framebufferTarget->planeAlpha = 0xFF;
525        }
526        disp.list->retireFenceFd = -1;
527        disp.list->flags = HWC_GEOMETRY_CHANGED;
528        disp.list->numHwLayers = numLayers;
529    }
530    return NO_ERROR;
531}
532
533status_t HWComposer::setFramebufferTarget(int32_t id,
534        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
535    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
536        return BAD_INDEX;
537    }
538    DisplayData& disp(mDisplayData[id]);
539    if (!disp.framebufferTarget) {
540        // this should never happen, but apparently eglCreateWindowSurface()
541        // triggers a Surface::queueBuffer()  on some
542        // devices (!?) -- log and ignore.
543        ALOGE("HWComposer: framebufferTarget is null");
544        return NO_ERROR;
545    }
546
547    int acquireFenceFd = -1;
548    if (acquireFence->isValid()) {
549        acquireFenceFd = acquireFence->dup();
550    }
551
552    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
553    disp.fbTargetHandle = buf->handle;
554    disp.framebufferTarget->handle = disp.fbTargetHandle;
555    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
556    return NO_ERROR;
557}
558
559status_t HWComposer::prepare() {
560    for (size_t i=0 ; i<mNumDisplays ; i++) {
561        DisplayData& disp(mDisplayData[i]);
562        if (disp.framebufferTarget) {
563            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
564            // DO NOT reset the handle field to NULL, because it's possible
565            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
566            // in which case, we should continue to use the same buffer.
567            LOG_FATAL_IF(disp.list == NULL);
568            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
569        }
570        if (!disp.connected && disp.list != NULL) {
571            ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
572                  i, disp.list->numHwLayers);
573        }
574        mLists[i] = disp.list;
575        if (mLists[i]) {
576            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
577                mLists[i]->outbuf = NULL;
578                mLists[i]->outbufAcquireFenceFd = -1;
579            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
580                // garbage data to catch improper use
581                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
582                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
583            } else {
584                mLists[i]->dpy = EGL_NO_DISPLAY;
585                mLists[i]->sur = EGL_NO_SURFACE;
586            }
587        }
588    }
589
590    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
591    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
592
593    if (err == NO_ERROR) {
594        // here we're just making sure that "skip" layers are set
595        // to HWC_FRAMEBUFFER and we're also counting how many layers
596        // we have of each type.
597        for (size_t i=0 ; i<mNumDisplays ; i++) {
598            DisplayData& disp(mDisplayData[i]);
599            disp.hasFbComp = false;
600            disp.hasOvComp = false;
601            if (disp.list) {
602                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
603                    hwc_layer_1_t& l = disp.list->hwLayers[i];
604
605                    //ALOGD("prepare: %d, type=%d, handle=%p",
606                    //        i, l.compositionType, l.handle);
607
608                    if (l.flags & HWC_SKIP_LAYER) {
609                        l.compositionType = HWC_FRAMEBUFFER;
610                    }
611                    if (l.compositionType == HWC_FRAMEBUFFER) {
612                        disp.hasFbComp = true;
613                    }
614                    if (l.compositionType == HWC_OVERLAY) {
615                        disp.hasOvComp = true;
616                    }
617                }
618            }
619        }
620    }
621    return (status_t)err;
622}
623
624bool HWComposer::hasHwcComposition(int32_t id) const {
625    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
626        return false;
627    return mDisplayData[id].hasOvComp;
628}
629
630bool HWComposer::hasGlesComposition(int32_t id) const {
631    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
632        return true;
633    return mDisplayData[id].hasFbComp;
634}
635
636sp<Fence> HWComposer::getAndResetReleaseFence(int32_t id) {
637    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
638        return Fence::NO_FENCE;
639
640    int fd = INVALID_OPERATION;
641    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
642        const DisplayData& disp(mDisplayData[id]);
643        if (disp.framebufferTarget) {
644            fd = disp.framebufferTarget->releaseFenceFd;
645            disp.framebufferTarget->acquireFenceFd = -1;
646            disp.framebufferTarget->releaseFenceFd = -1;
647        }
648    }
649    return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
650}
651
652status_t HWComposer::commit() {
653    int err = NO_ERROR;
654    if (mHwc) {
655        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
656            // On version 1.0, the OpenGL ES target surface is communicated
657            // by the (dpy, sur) fields and we are guaranteed to have only
658            // a single display.
659            mLists[0]->dpy = eglGetCurrentDisplay();
660            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
661        }
662
663        for (size_t i=VIRTUAL_DISPLAY_ID_BASE; i<mNumDisplays; i++) {
664            DisplayData& disp(mDisplayData[i]);
665            if (disp.outbufHandle) {
666                mLists[i]->outbuf = disp.outbufHandle;
667                mLists[i]->outbufAcquireFenceFd =
668                        disp.outbufAcquireFence->dup();
669            }
670        }
671
672        err = mHwc->set(mHwc, mNumDisplays, mLists);
673
674        for (size_t i=0 ; i<mNumDisplays ; i++) {
675            DisplayData& disp(mDisplayData[i]);
676            disp.lastDisplayFence = disp.lastRetireFence;
677            disp.lastRetireFence = Fence::NO_FENCE;
678            if (disp.list) {
679                if (disp.list->retireFenceFd != -1) {
680                    disp.lastRetireFence = new Fence(disp.list->retireFenceFd);
681                    disp.list->retireFenceFd = -1;
682                }
683                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
684            }
685        }
686    }
687    return (status_t)err;
688}
689
690status_t HWComposer::release(int disp) {
691    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
692    if (mHwc) {
693        eventControl(disp, HWC_EVENT_VSYNC, 0);
694        return (status_t)mHwc->blank(mHwc, disp, 1);
695    }
696    return NO_ERROR;
697}
698
699status_t HWComposer::acquire(int disp) {
700    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
701    if (mHwc) {
702        return (status_t)mHwc->blank(mHwc, disp, 0);
703    }
704    return NO_ERROR;
705}
706
707void HWComposer::disconnectDisplay(int disp) {
708    LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY);
709    DisplayData& dd(mDisplayData[disp]);
710    free(dd.list);
711    dd.list = NULL;
712    dd.framebufferTarget = NULL;    // points into dd.list
713    dd.fbTargetHandle = NULL;
714    dd.outbufHandle = NULL;
715    dd.lastRetireFence = Fence::NO_FENCE;
716    dd.lastDisplayFence = Fence::NO_FENCE;
717    dd.outbufAcquireFence = Fence::NO_FENCE;
718}
719
720int HWComposer::getVisualID() const {
721    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
722        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
723        // is supported by the implementation. we can only be in this case
724        // if we have HWC 1.1
725        return HAL_PIXEL_FORMAT_RGBA_8888;
726        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
727    } else {
728        return mFbDev->format;
729    }
730}
731
732bool HWComposer::supportsFramebufferTarget() const {
733    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
734}
735
736int HWComposer::fbPost(int32_t id,
737        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
738    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
739        return setFramebufferTarget(id, acquireFence, buffer);
740    } else {
741        acquireFence->waitForever("HWComposer::fbPost");
742        return mFbDev->post(mFbDev, buffer->handle);
743    }
744}
745
746int HWComposer::fbCompositionComplete() {
747    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
748        return NO_ERROR;
749
750    if (mFbDev->compositionComplete) {
751        return mFbDev->compositionComplete(mFbDev);
752    } else {
753        return INVALID_OPERATION;
754    }
755}
756
757void HWComposer::fbDump(String8& result) {
758    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
759        const size_t SIZE = 4096;
760        char buffer[SIZE];
761        mFbDev->dump(mFbDev, buffer, SIZE);
762        result.append(buffer);
763    }
764}
765
766status_t HWComposer::setOutputBuffer(int32_t id, const sp<Fence>& acquireFence,
767        const sp<GraphicBuffer>& buf) {
768    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
769        return BAD_INDEX;
770    if (id < VIRTUAL_DISPLAY_ID_BASE)
771        return INVALID_OPERATION;
772
773    DisplayData& disp(mDisplayData[id]);
774    disp.outbufHandle = buf->handle;
775    disp.outbufAcquireFence = acquireFence;
776    return NO_ERROR;
777}
778
779sp<Fence> HWComposer::getLastRetireFence(int32_t id) {
780    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
781        return Fence::NO_FENCE;
782    return mDisplayData[id].lastRetireFence;
783}
784
785/*
786 * Helper template to implement a concrete HWCLayer
787 * This holds the pointer to the concrete hwc layer type
788 * and implements the "iterable" side of HWCLayer.
789 */
790template<typename CONCRETE, typename HWCTYPE>
791class Iterable : public HWComposer::HWCLayer {
792protected:
793    HWCTYPE* const mLayerList;
794    HWCTYPE* mCurrentLayer;
795    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
796    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
797    inline HWCTYPE* getLayer() { return mCurrentLayer; }
798    virtual ~Iterable() { }
799private:
800    // returns a copy of ourselves
801    virtual HWComposer::HWCLayer* dup() {
802        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
803    }
804    virtual status_t setLayer(size_t index) {
805        mCurrentLayer = &mLayerList[index];
806        return NO_ERROR;
807    }
808};
809
810/*
811 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
812 * This implements the HWCLayer side of HWCIterableLayer.
813 */
814class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
815    struct hwc_composer_device_1* mHwc;
816public:
817    HWCLayerVersion1(struct hwc_composer_device_1* hwc, hwc_layer_1_t* layer)
818        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer), mHwc(hwc) { }
819
820    virtual int32_t getCompositionType() const {
821        return getLayer()->compositionType;
822    }
823    virtual uint32_t getHints() const {
824        return getLayer()->hints;
825    }
826    virtual sp<Fence> getAndResetReleaseFence() {
827        int fd = getLayer()->releaseFenceFd;
828        getLayer()->releaseFenceFd = -1;
829        return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
830    }
831    virtual void setAcquireFenceFd(int fenceFd) {
832        getLayer()->acquireFenceFd = fenceFd;
833    }
834    virtual void setPerFrameDefaultState() {
835        //getLayer()->compositionType = HWC_FRAMEBUFFER;
836    }
837    virtual void setPlaneAlpha(uint8_t alpha) {
838        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
839            getLayer()->planeAlpha = alpha;
840        } else {
841            if (alpha < 0xFF) {
842                getLayer()->flags |= HWC_SKIP_LAYER;
843            }
844        }
845    }
846    virtual void setDefaultState() {
847        hwc_layer_1_t* const l = getLayer();
848        l->compositionType = HWC_FRAMEBUFFER;
849        l->hints = 0;
850        l->flags = HWC_SKIP_LAYER;
851        l->handle = 0;
852        l->transform = 0;
853        l->blending = HWC_BLENDING_NONE;
854        l->visibleRegionScreen.numRects = 0;
855        l->visibleRegionScreen.rects = NULL;
856        l->acquireFenceFd = -1;
857        l->releaseFenceFd = -1;
858        l->planeAlpha = 0xFF;
859    }
860    virtual void setSkip(bool skip) {
861        if (skip) {
862            getLayer()->flags |= HWC_SKIP_LAYER;
863        } else {
864            getLayer()->flags &= ~HWC_SKIP_LAYER;
865        }
866    }
867    virtual void setBlending(uint32_t blending) {
868        getLayer()->blending = blending;
869    }
870    virtual void setTransform(uint32_t transform) {
871        getLayer()->transform = transform;
872    }
873    virtual void setFrame(const Rect& frame) {
874        getLayer()->displayFrame = reinterpret_cast<hwc_rect_t const&>(frame);
875    }
876    virtual void setCrop(const FloatRect& crop) {
877        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
878            getLayer()->sourceCropf = reinterpret_cast<hwc_frect_t const&>(crop);
879        } else {
880            /*
881             * Since h/w composer didn't support a flot crop rect before version 1.3,
882             * using integer coordinates instead produces a different output from the GL code in
883             * Layer::drawWithOpenGL(). The difference can be large if the buffer crop to
884             * window size ratio is large and a window crop is defined
885             * (i.e.: if we scale the buffer a lot and we also crop it with a window crop).
886             */
887            hwc_rect_t& r = getLayer()->sourceCrop;
888            r.left  = int(ceilf(crop.left));
889            r.top   = int(ceilf(crop.top));
890            r.right = int(floorf(crop.right));
891            r.bottom= int(floorf(crop.bottom));
892        }
893    }
894    virtual void setVisibleRegionScreen(const Region& reg) {
895        // Region::getSharedBuffer creates a reference to the underlying
896        // SharedBuffer of this Region, this reference is freed
897        // in onDisplayed()
898        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
899        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
900        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
901    }
902    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
903        if (buffer == 0 || buffer->handle == 0) {
904            getLayer()->compositionType = HWC_FRAMEBUFFER;
905            getLayer()->flags |= HWC_SKIP_LAYER;
906            getLayer()->handle = 0;
907        } else {
908            getLayer()->handle = buffer->handle;
909        }
910    }
911    virtual void onDisplayed() {
912        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
913        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
914        if (sb) {
915            sb->release();
916            // not technically needed but safer
917            visibleRegion.numRects = 0;
918            visibleRegion.rects = NULL;
919        }
920
921        getLayer()->acquireFenceFd = -1;
922    }
923};
924
925/*
926 * returns an iterator initialized at a given index in the layer list
927 */
928HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
929    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
930        return LayerListIterator();
931    }
932    const DisplayData& disp(mDisplayData[id]);
933    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
934        return LayerListIterator();
935    }
936    return LayerListIterator(new HWCLayerVersion1(mHwc, disp.list->hwLayers), index);
937}
938
939/*
940 * returns an iterator on the beginning of the layer list
941 */
942HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
943    return getLayerIterator(id, 0);
944}
945
946/*
947 * returns an iterator on the end of the layer list
948 */
949HWComposer::LayerListIterator HWComposer::end(int32_t id) {
950    size_t numLayers = 0;
951    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
952        const DisplayData& disp(mDisplayData[id]);
953        if (mHwc && disp.list) {
954            numLayers = disp.list->numHwLayers;
955            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
956                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
957                // which we ignore when iterating through the layer list.
958                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
959                if (numLayers) {
960                    numLayers--;
961                }
962            }
963        }
964    }
965    return getLayerIterator(id, numLayers);
966}
967
968void HWComposer::dump(String8& result) const {
969    if (mHwc) {
970        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
971        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
972        for (size_t i=0 ; i<mNumDisplays ; i++) {
973            const DisplayData& disp(mDisplayData[i]);
974            if (!disp.connected)
975                continue;
976
977            const Vector< sp<Layer> >& visibleLayersSortedByZ =
978                    mFlinger->getLayerSortedByZForHwcDisplay(i);
979
980            result.appendFormat(
981                    "  Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
982                    i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
983
984            if (disp.list) {
985                result.appendFormat(
986                        "  numHwLayers=%u, flags=%08x\n",
987                        disp.list->numHwLayers, disp.list->flags);
988
989                result.append(
990                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
991                        "------------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
992                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
993                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
994                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
995                    int32_t format = -1;
996                    String8 name("unknown");
997
998                    if (i < visibleLayersSortedByZ.size()) {
999                        const sp<Layer>& layer(visibleLayersSortedByZ[i]);
1000                        const sp<GraphicBuffer>& buffer(
1001                                layer->getActiveBuffer());
1002                        if (buffer != NULL) {
1003                            format = buffer->getPixelFormat();
1004                        }
1005                        name = layer->getName();
1006                    }
1007
1008                    int type = l.compositionType;
1009                    if (type == HWC_FRAMEBUFFER_TARGET) {
1010                        name = "HWC_FRAMEBUFFER_TARGET";
1011                        format = disp.format;
1012                    }
1013
1014                    static char const* compositionTypeName[] = {
1015                            "GLES",
1016                            "HWC",
1017                            "BACKGROUND",
1018                            "FB TARGET",
1019                            "UNKNOWN"};
1020                    if (type >= NELEM(compositionTypeName))
1021                        type = NELEM(compositionTypeName) - 1;
1022
1023                    result.appendFormat(
1024                            " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
1025                                    compositionTypeName[type],
1026                                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1027                                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
1028                                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1029                                    name.string());
1030                }
1031            }
1032        }
1033    }
1034
1035    if (mHwc && mHwc->dump) {
1036        const size_t SIZE = 4096;
1037        char buffer[SIZE];
1038        mHwc->dump(mHwc, buffer, SIZE);
1039        result.append(buffer);
1040    }
1041}
1042
1043// ---------------------------------------------------------------------------
1044
1045HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
1046    : mHwc(hwc), mEnabled(false),
1047      mNextFakeVSync(0),
1048      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
1049{
1050}
1051
1052void HWComposer::VSyncThread::setEnabled(bool enabled) {
1053    Mutex::Autolock _l(mLock);
1054    if (mEnabled != enabled) {
1055        mEnabled = enabled;
1056        mCondition.signal();
1057    }
1058}
1059
1060void HWComposer::VSyncThread::onFirstRef() {
1061    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
1062}
1063
1064bool HWComposer::VSyncThread::threadLoop() {
1065    { // scope for lock
1066        Mutex::Autolock _l(mLock);
1067        while (!mEnabled) {
1068            mCondition.wait(mLock);
1069        }
1070    }
1071
1072    const nsecs_t period = mRefreshPeriod;
1073    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
1074    nsecs_t next_vsync = mNextFakeVSync;
1075    nsecs_t sleep = next_vsync - now;
1076    if (sleep < 0) {
1077        // we missed, find where the next vsync should be
1078        sleep = (period - ((now - next_vsync) % period));
1079        next_vsync = now + sleep;
1080    }
1081    mNextFakeVSync = next_vsync + period;
1082
1083    struct timespec spec;
1084    spec.tv_sec  = next_vsync / 1000000000;
1085    spec.tv_nsec = next_vsync % 1000000000;
1086
1087    int err;
1088    do {
1089        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1090    } while (err<0 && errno == EINTR);
1091
1092    if (err == 0) {
1093        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1094    }
1095
1096    return true;
1097}
1098
1099HWComposer::DisplayData::DisplayData()
1100:   width(0), height(0), format(0),
1101    xdpi(0.0f), ydpi(0.0f),
1102    refresh(0),
1103    connected(false),
1104    hasFbComp(false), hasOvComp(false),
1105    capacity(0), list(NULL),
1106    framebufferTarget(NULL), fbTargetHandle(0),
1107    lastRetireFence(Fence::NO_FENCE), lastDisplayFence(Fence::NO_FENCE),
1108    outbufHandle(NULL), outbufAcquireFence(Fence::NO_FENCE),
1109    events(0)
1110{}
1111
1112HWComposer::DisplayData::~DisplayData() {
1113    free(list);
1114}
1115
1116// ---------------------------------------------------------------------------
1117}; // namespace android
1118