HWComposer.cpp revision faf77cce9d9ec0238d6999b3bd0d40c71ff403c5 
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      mDebugForceFakeVSync(false)
91{
92    for (size_t i =0 ; i<MAX_HWC_DISPLAYS ; i++) {
93        mLists[i] = 0;
94    }
95
96    for (size_t i=0 ; i<HWC_NUM_PHYSICAL_DISPLAY_TYPES ; i++) {
97        mLastHwVSync[i] = 0;
98        mVSyncCounts[i] = 0;
99    }
100
101    char value[PROPERTY_VALUE_MAX];
102    property_get("debug.sf.no_hw_vsync", value, "0");
103    mDebugForceFakeVSync = atoi(value);
104
105    bool needVSyncThread = true;
106
107    // Note: some devices may insist that the FB HAL be opened before HWC.
108    int fberr = loadFbHalModule();
109    loadHwcModule();
110
111    if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
112        // close FB HAL if we don't needed it.
113        // FIXME: this is temporary until we're not forced to open FB HAL
114        // before HWC.
115        framebuffer_close(mFbDev);
116        mFbDev = NULL;
117    }
118
119    // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
120    if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
121            && !mFbDev) {
122        ALOGE("ERROR: failed to open framebuffer (%s), aborting",
123                strerror(-fberr));
124        abort();
125    }
126
127    // these display IDs are always reserved
128    for (size_t i=0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
129        mAllocatedDisplayIDs.markBit(i);
130    }
131
132    if (mHwc) {
133        ALOGI("Using %s version %u.%u", HWC_HARDWARE_COMPOSER,
134              (hwcApiVersion(mHwc) >> 24) & 0xff,
135              (hwcApiVersion(mHwc) >> 16) & 0xff);
136        if (mHwc->registerProcs) {
137            mCBContext->hwc = this;
138            mCBContext->procs.invalidate = &hook_invalidate;
139            mCBContext->procs.vsync = &hook_vsync;
140            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
141                mCBContext->procs.hotplug = &hook_hotplug;
142            else
143                mCBContext->procs.hotplug = NULL;
144            memset(mCBContext->procs.zero, 0, sizeof(mCBContext->procs.zero));
145            mHwc->registerProcs(mHwc, &mCBContext->procs);
146        }
147
148        // don't need a vsync thread if we have a hardware composer
149        needVSyncThread = false;
150        // always turn vsync off when we start
151        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
152
153        // the number of displays we actually have depends on the
154        // hw composer version
155        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
156            // 1.3 adds support for virtual displays
157            mNumDisplays = MAX_HWC_DISPLAYS;
158        } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
159            // 1.1 adds support for multiple displays
160            mNumDisplays = NUM_BUILTIN_DISPLAYS;
161        } else {
162            mNumDisplays = 1;
163        }
164    }
165
166    if (mFbDev) {
167        ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
168                "should only have fbdev if no hwc or hwc is 1.0");
169
170        DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
171        disp.connected = true;
172        disp.width = mFbDev->width;
173        disp.height = mFbDev->height;
174        disp.format = mFbDev->format;
175        disp.xdpi = mFbDev->xdpi;
176        disp.ydpi = mFbDev->ydpi;
177        if (disp.refresh == 0) {
178            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
179            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
180        }
181        if (disp.refresh == 0) {
182            disp.refresh = nsecs_t(1e9 / 60.0);
183            ALOGW("getting VSYNC period from thin air: %lld",
184                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
185        }
186    } else if (mHwc) {
187        // here we're guaranteed to have at least HWC 1.1
188        for (size_t i =0 ; i<NUM_BUILTIN_DISPLAYS ; i++) {
189            queryDisplayProperties(i);
190        }
191    }
192
193    if (needVSyncThread) {
194        // we don't have VSYNC support, we need to fake it
195        mVSyncThread = new VSyncThread(*this);
196    }
197}
198
199HWComposer::~HWComposer() {
200    if (mHwc) {
201        eventControl(HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
202    }
203    if (mVSyncThread != NULL) {
204        mVSyncThread->requestExitAndWait();
205    }
206    if (mHwc) {
207        hwc_close_1(mHwc);
208    }
209    if (mFbDev) {
210        framebuffer_close(mFbDev);
211    }
212    delete mCBContext;
213}
214
215// Load and prepare the hardware composer module.  Sets mHwc.
216void HWComposer::loadHwcModule()
217{
218    hw_module_t const* module;
219
220    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
221        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
222        return;
223    }
224
225    int err = hwc_open_1(module, &mHwc);
226    if (err) {
227        ALOGE("%s device failed to initialize (%s)",
228              HWC_HARDWARE_COMPOSER, strerror(-err));
229        return;
230    }
231
232    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
233            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
234            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
235        ALOGE("%s device version %#x unsupported, will not be used",
236              HWC_HARDWARE_COMPOSER, mHwc->common.version);
237        hwc_close_1(mHwc);
238        mHwc = NULL;
239        return;
240    }
241}
242
243// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
244int HWComposer::loadFbHalModule()
245{
246    hw_module_t const* module;
247
248    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
249    if (err != 0) {
250        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
251        return err;
252    }
253
254    return framebuffer_open(module, &mFbDev);
255}
256
257status_t HWComposer::initCheck() const {
258    return mHwc ? NO_ERROR : NO_INIT;
259}
260
261void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
262    cb_context* ctx = reinterpret_cast<cb_context*>(
263            const_cast<hwc_procs_t*>(procs));
264    ctx->hwc->invalidate();
265}
266
267void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
268        int64_t timestamp) {
269    cb_context* ctx = reinterpret_cast<cb_context*>(
270            const_cast<hwc_procs_t*>(procs));
271    ctx->hwc->vsync(disp, timestamp);
272}
273
274void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
275        int connected) {
276    cb_context* ctx = reinterpret_cast<cb_context*>(
277            const_cast<hwc_procs_t*>(procs));
278    ctx->hwc->hotplug(disp, connected);
279}
280
281void HWComposer::invalidate() {
282    mFlinger->repaintEverything();
283}
284
285void HWComposer::vsync(int disp, int64_t timestamp) {
286    if (uint32_t(disp) < HWC_NUM_PHYSICAL_DISPLAY_TYPES) {
287        char tag[16];
288        snprintf(tag, sizeof(tag), "HW_VSYNC_%1u", disp);
289        ATRACE_INT(tag, ++mVSyncCounts[disp] & 1);
290
291        mEventHandler.onVSyncReceived(disp, timestamp);
292        Mutex::Autolock _l(mLock);
293        mLastHwVSync[disp] = timestamp;
294    }
295}
296
297void HWComposer::hotplug(int disp, int connected) {
298    if (disp == HWC_DISPLAY_PRIMARY || disp >= VIRTUAL_DISPLAY_ID_BASE) {
299        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
300                disp, connected);
301        return;
302    }
303    queryDisplayProperties(disp);
304    mEventHandler.onHotplugReceived(disp, bool(connected));
305}
306
307static float getDefaultDensity(uint32_t height) {
308    if (height >= 1080) return ACONFIGURATION_DENSITY_XHIGH;
309    else                return ACONFIGURATION_DENSITY_TV;
310}
311
312static const uint32_t DISPLAY_ATTRIBUTES[] = {
313    HWC_DISPLAY_VSYNC_PERIOD,
314    HWC_DISPLAY_WIDTH,
315    HWC_DISPLAY_HEIGHT,
316    HWC_DISPLAY_DPI_X,
317    HWC_DISPLAY_DPI_Y,
318    HWC_DISPLAY_NO_ATTRIBUTE,
319};
320#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
321
322status_t HWComposer::queryDisplayProperties(int disp) {
323
324    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
325
326    // use zero as default value for unspecified attributes
327    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
328    memset(values, 0, sizeof(values));
329
330    uint32_t config;
331    size_t numConfigs = 1;
332    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
333    if (err != NO_ERROR) {
334        // this can happen if an unpluggable display is not connected
335        mDisplayData[disp].connected = false;
336        return err;
337    }
338
339    err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
340    if (err != NO_ERROR) {
341        // we can't get this display's info. turn it off.
342        mDisplayData[disp].connected = false;
343        return err;
344    }
345
346    int32_t w = 0, h = 0;
347    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
348        switch (DISPLAY_ATTRIBUTES[i]) {
349        case HWC_DISPLAY_VSYNC_PERIOD:
350            mDisplayData[disp].refresh = nsecs_t(values[i]);
351            break;
352        case HWC_DISPLAY_WIDTH:
353            mDisplayData[disp].width = values[i];
354            break;
355        case HWC_DISPLAY_HEIGHT:
356            mDisplayData[disp].height = values[i];
357            break;
358        case HWC_DISPLAY_DPI_X:
359            mDisplayData[disp].xdpi = values[i] / 1000.0f;
360            break;
361        case HWC_DISPLAY_DPI_Y:
362            mDisplayData[disp].ydpi = values[i] / 1000.0f;
363            break;
364        default:
365            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
366                    i, DISPLAY_ATTRIBUTES[i]);
367            break;
368        }
369    }
370
371    // FIXME: what should we set the format to?
372    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
373    mDisplayData[disp].connected = true;
374    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
375        float dpi = getDefaultDensity(h);
376        mDisplayData[disp].xdpi = dpi;
377        mDisplayData[disp].ydpi = dpi;
378    }
379    return NO_ERROR;
380}
381
382status_t HWComposer::setVirtualDisplayProperties(int32_t id,
383        uint32_t w, uint32_t h, uint32_t format) {
384    if (id < VIRTUAL_DISPLAY_ID_BASE || id >= int32_t(mNumDisplays) ||
385            !mAllocatedDisplayIDs.hasBit(id)) {
386        return BAD_INDEX;
387    }
388    mDisplayData[id].width = w;
389    mDisplayData[id].height = h;
390    mDisplayData[id].format = format;
391    mDisplayData[id].xdpi = mDisplayData[id].ydpi = getDefaultDensity(h);
392    return NO_ERROR;
393}
394
395int32_t HWComposer::allocateDisplayId() {
396    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
397        return NO_MEMORY;
398    }
399    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
400    mAllocatedDisplayIDs.markBit(id);
401    mDisplayData[id].connected = true;
402    return id;
403}
404
405status_t HWComposer::freeDisplayId(int32_t id) {
406    if (id < NUM_BUILTIN_DISPLAYS) {
407        // cannot free the reserved IDs
408        return BAD_VALUE;
409    }
410    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
411        return BAD_INDEX;
412    }
413    mAllocatedDisplayIDs.clearBit(id);
414    mDisplayData[id].connected = false;
415    return NO_ERROR;
416}
417
418nsecs_t HWComposer::getRefreshPeriod(int disp) const {
419    return mDisplayData[disp].refresh;
420}
421
422nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
423    // this returns the last refresh timestamp.
424    // if the last one is not available, we estimate it based on
425    // the refresh period and whatever closest timestamp we have.
426    Mutex::Autolock _l(mLock);
427    nsecs_t now = systemTime(CLOCK_MONOTONIC);
428    return now - ((now - mLastHwVSync[disp]) %  mDisplayData[disp].refresh);
429}
430
431sp<Fence> HWComposer::getDisplayFence(int disp) const {
432    return mDisplayData[disp].lastDisplayFence;
433}
434
435uint32_t HWComposer::getWidth(int disp) const {
436    return mDisplayData[disp].width;
437}
438
439uint32_t HWComposer::getHeight(int disp) const {
440    return mDisplayData[disp].height;
441}
442
443uint32_t HWComposer::getFormat(int disp) const {
444    return mDisplayData[disp].format;
445}
446
447float HWComposer::getDpiX(int disp) const {
448    return mDisplayData[disp].xdpi;
449}
450
451float HWComposer::getDpiY(int disp) const {
452    return mDisplayData[disp].ydpi;
453}
454
455bool HWComposer::isConnected(int disp) const {
456    return mDisplayData[disp].connected;
457}
458
459void HWComposer::eventControl(int disp, int event, int enabled) {
460    if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
461        ALOGD("eventControl ignoring event %d on unallocated disp %d (en=%d)",
462              event, disp, enabled);
463        return;
464    }
465    if (event != EVENT_VSYNC) {
466        ALOGW("eventControl got unexpected event %d (disp=%d en=%d)",
467              event, disp, enabled);
468        return;
469    }
470    status_t err = NO_ERROR;
471    if (mHwc && !mDebugForceFakeVSync) {
472        // NOTE: we use our own internal lock here because we have to call
473        // into the HWC with the lock held, and we want to make sure
474        // that even if HWC blocks (which it shouldn't), it won't
475        // affect other threads.
476        Mutex::Autolock _l(mEventControlLock);
477        const int32_t eventBit = 1UL << event;
478        const int32_t newValue = enabled ? eventBit : 0;
479        const int32_t oldValue = mDisplayData[disp].events & eventBit;
480        if (newValue != oldValue) {
481            ATRACE_CALL();
482            err = mHwc->eventControl(mHwc, disp, event, enabled);
483            if (!err) {
484                int32_t& events(mDisplayData[disp].events);
485                events = (events & ~eventBit) | newValue;
486            }
487        }
488        // error here should not happen -- not sure what we should
489        // do if it does.
490        ALOGE_IF(err, "eventControl(%d, %d) failed %s",
491                event, enabled, strerror(-err));
492    }
493
494    if (err == NO_ERROR && mVSyncThread != NULL) {
495        mVSyncThread->setEnabled(enabled);
496    }
497}
498
499status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
500    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
501        return BAD_INDEX;
502    }
503
504    if (mHwc) {
505        DisplayData& disp(mDisplayData[id]);
506        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
507            // we need space for the HWC_FRAMEBUFFER_TARGET
508            numLayers++;
509        }
510        if (disp.capacity < numLayers || disp.list == NULL) {
511            size_t size = sizeof(hwc_display_contents_1_t)
512                    + numLayers * sizeof(hwc_layer_1_t);
513            free(disp.list);
514            disp.list = (hwc_display_contents_1_t*)malloc(size);
515            disp.capacity = numLayers;
516        }
517        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
518            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
519            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
520            const hwc_rect_t r = { 0, 0, (int) disp.width, (int) disp.height };
521            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
522            disp.framebufferTarget->hints = 0;
523            disp.framebufferTarget->flags = 0;
524            disp.framebufferTarget->handle = disp.fbTargetHandle;
525            disp.framebufferTarget->transform = 0;
526            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
527            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
528                disp.framebufferTarget->sourceCropf.left = 0;
529                disp.framebufferTarget->sourceCropf.top = 0;
530                disp.framebufferTarget->sourceCropf.right = disp.width;
531                disp.framebufferTarget->sourceCropf.bottom = disp.height;
532            } else {
533                disp.framebufferTarget->sourceCrop = r;
534            }
535            disp.framebufferTarget->displayFrame = r;
536            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
537            disp.framebufferTarget->visibleRegionScreen.rects =
538                &disp.framebufferTarget->displayFrame;
539            disp.framebufferTarget->acquireFenceFd = -1;
540            disp.framebufferTarget->releaseFenceFd = -1;
541            disp.framebufferTarget->planeAlpha = 0xFF;
542        }
543        disp.list->retireFenceFd = -1;
544        disp.list->flags = HWC_GEOMETRY_CHANGED;
545        disp.list->numHwLayers = numLayers;
546    }
547    return NO_ERROR;
548}
549
550status_t HWComposer::setFramebufferTarget(int32_t id,
551        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
552    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
553        return BAD_INDEX;
554    }
555    DisplayData& disp(mDisplayData[id]);
556    if (!disp.framebufferTarget) {
557        // this should never happen, but apparently eglCreateWindowSurface()
558        // triggers a Surface::queueBuffer()  on some
559        // devices (!?) -- log and ignore.
560        ALOGE("HWComposer: framebufferTarget is null");
561        return NO_ERROR;
562    }
563
564    int acquireFenceFd = -1;
565    if (acquireFence->isValid()) {
566        acquireFenceFd = acquireFence->dup();
567    }
568
569    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
570    disp.fbTargetHandle = buf->handle;
571    disp.framebufferTarget->handle = disp.fbTargetHandle;
572    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
573    return NO_ERROR;
574}
575
576status_t HWComposer::prepare() {
577    for (size_t i=0 ; i<mNumDisplays ; i++) {
578        DisplayData& disp(mDisplayData[i]);
579        if (disp.framebufferTarget) {
580            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
581            // DO NOT reset the handle field to NULL, because it's possible
582            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
583            // in which case, we should continue to use the same buffer.
584            LOG_FATAL_IF(disp.list == NULL);
585            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
586        }
587        if (!disp.connected && disp.list != NULL) {
588            ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
589                  i, disp.list->numHwLayers);
590        }
591        mLists[i] = disp.list;
592        if (mLists[i]) {
593            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
594                mLists[i]->outbuf = NULL;
595                mLists[i]->outbufAcquireFenceFd = -1;
596            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
597                // garbage data to catch improper use
598                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
599                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
600            } else {
601                mLists[i]->dpy = EGL_NO_DISPLAY;
602                mLists[i]->sur = EGL_NO_SURFACE;
603            }
604        }
605    }
606
607    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
608    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
609
610    if (err == NO_ERROR) {
611        // here we're just making sure that "skip" layers are set
612        // to HWC_FRAMEBUFFER and we're also counting how many layers
613        // we have of each type.
614        //
615        // If there are no window layers, we treat the display has having FB
616        // composition, because SurfaceFlinger will use GLES to draw the
617        // wormhole region.
618        for (size_t i=0 ; i<mNumDisplays ; i++) {
619            DisplayData& disp(mDisplayData[i]);
620            disp.hasFbComp = false;
621            disp.hasOvComp = false;
622            if (disp.list) {
623                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
624                    hwc_layer_1_t& l = disp.list->hwLayers[i];
625
626                    //ALOGD("prepare: %d, type=%d, handle=%p",
627                    //        i, l.compositionType, l.handle);
628
629                    if (l.flags & HWC_SKIP_LAYER) {
630                        l.compositionType = HWC_FRAMEBUFFER;
631                    }
632                    if (l.compositionType == HWC_FRAMEBUFFER) {
633                        disp.hasFbComp = true;
634                    }
635                    if (l.compositionType == HWC_OVERLAY) {
636                        disp.hasOvComp = true;
637                    }
638                }
639                if (disp.list->numHwLayers == (disp.framebufferTarget ? 1 : 0)) {
640                    disp.hasFbComp = true;
641                }
642            } else {
643                disp.hasFbComp = true;
644            }
645        }
646    }
647    return (status_t)err;
648}
649
650bool HWComposer::hasHwcComposition(int32_t id) const {
651    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
652        return false;
653    return mDisplayData[id].hasOvComp;
654}
655
656bool HWComposer::hasGlesComposition(int32_t id) const {
657    if (!mHwc || uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
658        return true;
659    return mDisplayData[id].hasFbComp;
660}
661
662sp<Fence> HWComposer::getAndResetReleaseFence(int32_t id) {
663    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
664        return Fence::NO_FENCE;
665
666    int fd = INVALID_OPERATION;
667    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
668        const DisplayData& disp(mDisplayData[id]);
669        if (disp.framebufferTarget) {
670            fd = disp.framebufferTarget->releaseFenceFd;
671            disp.framebufferTarget->acquireFenceFd = -1;
672            disp.framebufferTarget->releaseFenceFd = -1;
673        }
674    }
675    return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
676}
677
678status_t HWComposer::commit() {
679    int err = NO_ERROR;
680    if (mHwc) {
681        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
682            // On version 1.0, the OpenGL ES target surface is communicated
683            // by the (dpy, sur) fields and we are guaranteed to have only
684            // a single display.
685            mLists[0]->dpy = eglGetCurrentDisplay();
686            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
687        }
688
689        for (size_t i=VIRTUAL_DISPLAY_ID_BASE; i<mNumDisplays; i++) {
690            DisplayData& disp(mDisplayData[i]);
691            if (disp.outbufHandle) {
692                mLists[i]->outbuf = disp.outbufHandle;
693                mLists[i]->outbufAcquireFenceFd =
694                        disp.outbufAcquireFence->dup();
695            }
696        }
697
698        err = mHwc->set(mHwc, mNumDisplays, mLists);
699
700        for (size_t i=0 ; i<mNumDisplays ; i++) {
701            DisplayData& disp(mDisplayData[i]);
702            disp.lastDisplayFence = disp.lastRetireFence;
703            disp.lastRetireFence = Fence::NO_FENCE;
704            if (disp.list) {
705                if (disp.list->retireFenceFd != -1) {
706                    disp.lastRetireFence = new Fence(disp.list->retireFenceFd);
707                    disp.list->retireFenceFd = -1;
708                }
709                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
710            }
711        }
712    }
713    return (status_t)err;
714}
715
716status_t HWComposer::release(int disp) {
717    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
718    if (mHwc) {
719        eventControl(disp, HWC_EVENT_VSYNC, 0);
720        return (status_t)mHwc->blank(mHwc, disp, 1);
721    }
722    return NO_ERROR;
723}
724
725status_t HWComposer::acquire(int disp) {
726    LOG_FATAL_IF(disp >= VIRTUAL_DISPLAY_ID_BASE);
727    if (mHwc) {
728        return (status_t)mHwc->blank(mHwc, disp, 0);
729    }
730    return NO_ERROR;
731}
732
733void HWComposer::disconnectDisplay(int disp) {
734    LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY);
735    DisplayData& dd(mDisplayData[disp]);
736    free(dd.list);
737    dd.list = NULL;
738    dd.framebufferTarget = NULL;    // points into dd.list
739    dd.fbTargetHandle = NULL;
740    dd.outbufHandle = NULL;
741    dd.lastRetireFence = Fence::NO_FENCE;
742    dd.lastDisplayFence = Fence::NO_FENCE;
743    dd.outbufAcquireFence = Fence::NO_FENCE;
744}
745
746int HWComposer::getVisualID() const {
747    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
748        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
749        // is supported by the implementation. we can only be in this case
750        // if we have HWC 1.1
751        return HAL_PIXEL_FORMAT_RGBA_8888;
752        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
753    } else {
754        return mFbDev->format;
755    }
756}
757
758bool HWComposer::supportsFramebufferTarget() const {
759    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
760}
761
762int HWComposer::fbPost(int32_t id,
763        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
764    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
765        return setFramebufferTarget(id, acquireFence, buffer);
766    } else {
767        acquireFence->waitForever("HWComposer::fbPost");
768        return mFbDev->post(mFbDev, buffer->handle);
769    }
770}
771
772int HWComposer::fbCompositionComplete() {
773    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
774        return NO_ERROR;
775
776    if (mFbDev->compositionComplete) {
777        return mFbDev->compositionComplete(mFbDev);
778    } else {
779        return INVALID_OPERATION;
780    }
781}
782
783void HWComposer::fbDump(String8& result) {
784    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
785        const size_t SIZE = 4096;
786        char buffer[SIZE];
787        mFbDev->dump(mFbDev, buffer, SIZE);
788        result.append(buffer);
789    }
790}
791
792status_t HWComposer::setOutputBuffer(int32_t id, const sp<Fence>& acquireFence,
793        const sp<GraphicBuffer>& buf) {
794    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
795        return BAD_INDEX;
796    if (id < VIRTUAL_DISPLAY_ID_BASE)
797        return INVALID_OPERATION;
798
799    DisplayData& disp(mDisplayData[id]);
800    disp.outbufHandle = buf->handle;
801    disp.outbufAcquireFence = acquireFence;
802    return NO_ERROR;
803}
804
805sp<Fence> HWComposer::getLastRetireFence(int32_t id) {
806    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
807        return Fence::NO_FENCE;
808    return mDisplayData[id].lastRetireFence;
809}
810
811/*
812 * Helper template to implement a concrete HWCLayer
813 * This holds the pointer to the concrete hwc layer type
814 * and implements the "iterable" side of HWCLayer.
815 */
816template<typename CONCRETE, typename HWCTYPE>
817class Iterable : public HWComposer::HWCLayer {
818protected:
819    HWCTYPE* const mLayerList;
820    HWCTYPE* mCurrentLayer;
821    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
822    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
823    inline HWCTYPE* getLayer() { return mCurrentLayer; }
824    virtual ~Iterable() { }
825private:
826    // returns a copy of ourselves
827    virtual HWComposer::HWCLayer* dup() {
828        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
829    }
830    virtual status_t setLayer(size_t index) {
831        mCurrentLayer = &mLayerList[index];
832        return NO_ERROR;
833    }
834};
835
836/*
837 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
838 * This implements the HWCLayer side of HWCIterableLayer.
839 */
840class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
841    struct hwc_composer_device_1* mHwc;
842public:
843    HWCLayerVersion1(struct hwc_composer_device_1* hwc, hwc_layer_1_t* layer)
844        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer), mHwc(hwc) { }
845
846    virtual int32_t getCompositionType() const {
847        return getLayer()->compositionType;
848    }
849    virtual uint32_t getHints() const {
850        return getLayer()->hints;
851    }
852    virtual sp<Fence> getAndResetReleaseFence() {
853        int fd = getLayer()->releaseFenceFd;
854        getLayer()->releaseFenceFd = -1;
855        return fd >= 0 ? new Fence(fd) : Fence::NO_FENCE;
856    }
857    virtual void setAcquireFenceFd(int fenceFd) {
858        getLayer()->acquireFenceFd = fenceFd;
859    }
860    virtual void setPerFrameDefaultState() {
861        //getLayer()->compositionType = HWC_FRAMEBUFFER;
862    }
863    virtual void setPlaneAlpha(uint8_t alpha) {
864        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
865            getLayer()->planeAlpha = alpha;
866        } else {
867            if (alpha < 0xFF) {
868                getLayer()->flags |= HWC_SKIP_LAYER;
869            }
870        }
871    }
872    virtual void setDefaultState() {
873        hwc_layer_1_t* const l = getLayer();
874        l->compositionType = HWC_FRAMEBUFFER;
875        l->hints = 0;
876        l->flags = HWC_SKIP_LAYER;
877        l->handle = 0;
878        l->transform = 0;
879        l->blending = HWC_BLENDING_NONE;
880        l->visibleRegionScreen.numRects = 0;
881        l->visibleRegionScreen.rects = NULL;
882        l->acquireFenceFd = -1;
883        l->releaseFenceFd = -1;
884        l->planeAlpha = 0xFF;
885    }
886    virtual void setSkip(bool skip) {
887        if (skip) {
888            getLayer()->flags |= HWC_SKIP_LAYER;
889        } else {
890            getLayer()->flags &= ~HWC_SKIP_LAYER;
891        }
892    }
893    virtual void setBlending(uint32_t blending) {
894        getLayer()->blending = blending;
895    }
896    virtual void setTransform(uint32_t transform) {
897        getLayer()->transform = transform;
898    }
899    virtual void setFrame(const Rect& frame) {
900        getLayer()->displayFrame = reinterpret_cast<hwc_rect_t const&>(frame);
901    }
902    virtual void setCrop(const FloatRect& crop) {
903        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
904            getLayer()->sourceCropf = reinterpret_cast<hwc_frect_t const&>(crop);
905        } else {
906            /*
907             * Since h/w composer didn't support a flot crop rect before version 1.3,
908             * using integer coordinates instead produces a different output from the GL code in
909             * Layer::drawWithOpenGL(). The difference can be large if the buffer crop to
910             * window size ratio is large and a window crop is defined
911             * (i.e.: if we scale the buffer a lot and we also crop it with a window crop).
912             */
913            hwc_rect_t& r = getLayer()->sourceCrop;
914            r.left  = int(ceilf(crop.left));
915            r.top   = int(ceilf(crop.top));
916            r.right = int(floorf(crop.right));
917            r.bottom= int(floorf(crop.bottom));
918        }
919    }
920    virtual void setVisibleRegionScreen(const Region& reg) {
921        // Region::getSharedBuffer creates a reference to the underlying
922        // SharedBuffer of this Region, this reference is freed
923        // in onDisplayed()
924        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
925        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
926        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
927    }
928    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
929        if (buffer == 0 || buffer->handle == 0) {
930            getLayer()->compositionType = HWC_FRAMEBUFFER;
931            getLayer()->flags |= HWC_SKIP_LAYER;
932            getLayer()->handle = 0;
933        } else {
934            getLayer()->handle = buffer->handle;
935        }
936    }
937    virtual void onDisplayed() {
938        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
939        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
940        if (sb) {
941            sb->release();
942            // not technically needed but safer
943            visibleRegion.numRects = 0;
944            visibleRegion.rects = NULL;
945        }
946
947        getLayer()->acquireFenceFd = -1;
948    }
949};
950
951/*
952 * returns an iterator initialized at a given index in the layer list
953 */
954HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
955    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
956        return LayerListIterator();
957    }
958    const DisplayData& disp(mDisplayData[id]);
959    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
960        return LayerListIterator();
961    }
962    return LayerListIterator(new HWCLayerVersion1(mHwc, disp.list->hwLayers), index);
963}
964
965/*
966 * returns an iterator on the beginning of the layer list
967 */
968HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
969    return getLayerIterator(id, 0);
970}
971
972/*
973 * returns an iterator on the end of the layer list
974 */
975HWComposer::LayerListIterator HWComposer::end(int32_t id) {
976    size_t numLayers = 0;
977    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
978        const DisplayData& disp(mDisplayData[id]);
979        if (mHwc && disp.list) {
980            numLayers = disp.list->numHwLayers;
981            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
982                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
983                // which we ignore when iterating through the layer list.
984                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
985                if (numLayers) {
986                    numLayers--;
987                }
988            }
989        }
990    }
991    return getLayerIterator(id, numLayers);
992}
993
994void HWComposer::dump(String8& result) const {
995    if (mHwc) {
996        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
997        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
998        for (size_t i=0 ; i<mNumDisplays ; i++) {
999            const DisplayData& disp(mDisplayData[i]);
1000            if (!disp.connected)
1001                continue;
1002
1003            const Vector< sp<Layer> >& visibleLayersSortedByZ =
1004                    mFlinger->getLayerSortedByZForHwcDisplay(i);
1005
1006            result.appendFormat(
1007                    "  Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
1008                    i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
1009
1010            if (disp.list) {
1011                result.appendFormat(
1012                        "  numHwLayers=%u, flags=%08x\n",
1013                        disp.list->numHwLayers, disp.list->flags);
1014
1015                result.append(
1016                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |          source crop            |           frame           name \n"
1017                        "------------+----------+----------+----------+----+-------+----------+---------------------------------+--------------------------------\n");
1018                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____._,_____._,_____._,_____._] | [_____,_____,_____,_____]
1019                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
1020                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
1021                    int32_t format = -1;
1022                    String8 name("unknown");
1023
1024                    if (i < visibleLayersSortedByZ.size()) {
1025                        const sp<Layer>& layer(visibleLayersSortedByZ[i]);
1026                        const sp<GraphicBuffer>& buffer(
1027                                layer->getActiveBuffer());
1028                        if (buffer != NULL) {
1029                            format = buffer->getPixelFormat();
1030                        }
1031                        name = layer->getName();
1032                    }
1033
1034                    int type = l.compositionType;
1035                    if (type == HWC_FRAMEBUFFER_TARGET) {
1036                        name = "HWC_FRAMEBUFFER_TARGET";
1037                        format = disp.format;
1038                    }
1039
1040                    static char const* compositionTypeName[] = {
1041                            "GLES",
1042                            "HWC",
1043                            "BACKGROUND",
1044                            "FB TARGET",
1045                            "UNKNOWN"};
1046                    if (type >= NELEM(compositionTypeName))
1047                        type = NELEM(compositionTypeName) - 1;
1048
1049                    if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_3)) {
1050                        result.appendFormat(
1051                                " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7.1f,%7.1f,%7.1f,%7.1f] | [%5d,%5d,%5d,%5d] %s\n",
1052                                        compositionTypeName[type],
1053                                        intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1054                                        l.sourceCropf.left, l.sourceCropf.top, l.sourceCropf.right, l.sourceCropf.bottom,
1055                                        l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1056                                        name.string());
1057                    } else {
1058                        result.appendFormat(
1059                                " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%7d,%7d,%7d,%7d] | [%5d,%5d,%5d,%5d] %s\n",
1060                                        compositionTypeName[type],
1061                                        intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
1062                                        l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
1063                                        l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
1064                                        name.string());
1065                    }
1066                }
1067            }
1068        }
1069    }
1070
1071    if (mHwc && mHwc->dump) {
1072        const size_t SIZE = 4096;
1073        char buffer[SIZE];
1074        mHwc->dump(mHwc, buffer, SIZE);
1075        result.append(buffer);
1076    }
1077}
1078
1079// ---------------------------------------------------------------------------
1080
1081HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
1082    : mHwc(hwc), mEnabled(false),
1083      mNextFakeVSync(0),
1084      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
1085{
1086}
1087
1088void HWComposer::VSyncThread::setEnabled(bool enabled) {
1089    Mutex::Autolock _l(mLock);
1090    if (mEnabled != enabled) {
1091        mEnabled = enabled;
1092        mCondition.signal();
1093    }
1094}
1095
1096void HWComposer::VSyncThread::onFirstRef() {
1097    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
1098}
1099
1100bool HWComposer::VSyncThread::threadLoop() {
1101    { // scope for lock
1102        Mutex::Autolock _l(mLock);
1103        while (!mEnabled) {
1104            mCondition.wait(mLock);
1105        }
1106    }
1107
1108    const nsecs_t period = mRefreshPeriod;
1109    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
1110    nsecs_t next_vsync = mNextFakeVSync;
1111    nsecs_t sleep = next_vsync - now;
1112    if (sleep < 0) {
1113        // we missed, find where the next vsync should be
1114        sleep = (period - ((now - next_vsync) % period));
1115        next_vsync = now + sleep;
1116    }
1117    mNextFakeVSync = next_vsync + period;
1118
1119    struct timespec spec;
1120    spec.tv_sec  = next_vsync / 1000000000;
1121    spec.tv_nsec = next_vsync % 1000000000;
1122
1123    int err;
1124    do {
1125        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1126    } while (err<0 && errno == EINTR);
1127
1128    if (err == 0) {
1129        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1130    }
1131
1132    return true;
1133}
1134
1135HWComposer::DisplayData::DisplayData()
1136:   width(0), height(0), format(0),
1137    xdpi(0.0f), ydpi(0.0f),
1138    refresh(0),
1139    connected(false),
1140    hasFbComp(false), hasOvComp(false),
1141    capacity(0), list(NULL),
1142    framebufferTarget(NULL), fbTargetHandle(0),
1143    lastRetireFence(Fence::NO_FENCE), lastDisplayFence(Fence::NO_FENCE),
1144    outbufHandle(NULL), outbufAcquireFence(Fence::NO_FENCE),
1145    events(0)
1146{}
1147
1148HWComposer::DisplayData::~DisplayData() {
1149    free(list);
1150}
1151
1152// ---------------------------------------------------------------------------
1153}; // namespace android
1154