HWComposer.cpp revision f5a33928349bebc8eebc9f466618997e98c24e68 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19// Uncomment this to remove support for HWC_DEVICE_API_VERSION_0_3 and older
20#define HWC_REMOVE_DEPRECATED_VERSIONS 1
21
22#include <stdint.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <sys/types.h>
27
28#include <utils/Errors.h>
29#include <utils/misc.h>
30#include <utils/String8.h>
31#include <utils/Thread.h>
32#include <utils/Trace.h>
33#include <utils/Vector.h>
34
35#include <ui/GraphicBuffer.h>
36
37#include <hardware/hardware.h>
38#include <hardware/hwcomposer.h>
39
40#include <cutils/log.h>
41#include <cutils/properties.h>
42
43#include "Layer.h"           // needed only for debugging
44#include "LayerBase.h"
45#include "HWComposer.h"
46#include "SurfaceFlinger.h"
47#include <utils/CallStack.h>
48
49namespace android {
50
51#define MIN_HWC_HEADER_VERSION 0
52
53static uint32_t hwcApiVersion(const hwc_composer_device_1_t* hwc) {
54    uint32_t hwcVersion = hwc->common.version;
55    if (MIN_HWC_HEADER_VERSION == 0 &&
56            (hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK) == 0) {
57        // legacy version encoding
58        hwcVersion <<= 16;
59    }
60    return hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK;
61}
62
63static uint32_t hwcHeaderVersion(const hwc_composer_device_1_t* hwc) {
64    uint32_t hwcVersion = hwc->common.version;
65    if (MIN_HWC_HEADER_VERSION == 0 &&
66            (hwcVersion & HARDWARE_API_VERSION_2_MAJ_MIN_MASK) == 0) {
67        // legacy version encoding
68        hwcVersion <<= 16;
69    }
70    return hwcVersion & HARDWARE_API_VERSION_2_HEADER_MASK;
71}
72
73static bool hwcHasApiVersion(const hwc_composer_device_1_t* hwc,
74        uint32_t version) {
75    return hwcApiVersion(hwc) >= (version & HARDWARE_API_VERSION_2_MAJ_MIN_MASK);
76}
77
78// ---------------------------------------------------------------------------
79
80struct HWComposer::cb_context {
81    struct callbacks : public hwc_procs_t {
82        // these are here to facilitate the transition when adding
83        // new callbacks (an implementation can check for NULL before
84        // calling a new callback).
85        void (*zero[4])(void);
86    };
87    callbacks procs;
88    HWComposer* hwc;
89};
90
91// ---------------------------------------------------------------------------
92
93HWComposer::HWComposer(
94        const sp<SurfaceFlinger>& flinger,
95        EventHandler& handler)
96    : mFlinger(flinger),
97      mFbDev(0), mHwc(0), mNumDisplays(1),
98      mCBContext(new cb_context),
99      mEventHandler(handler),
100      mVSyncCount(0), mDebugForceFakeVSync(false)
101{
102    for (size_t i =0 ; i<MAX_DISPLAYS ; i++) {
103        mLists[i] = 0;
104    }
105
106    char value[PROPERTY_VALUE_MAX];
107    property_get("debug.sf.no_hw_vsync", value, "0");
108    mDebugForceFakeVSync = atoi(value);
109
110    bool needVSyncThread = true;
111
112    // Note: some devices may insist that the FB HAL be opened before HWC.
113    loadFbHalModule();
114    loadHwcModule();
115
116    if (mFbDev && mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
117        // close FB HAL if we don't needed it.
118        // FIXME: this is temporary until we're not forced to open FB HAL
119        // before HWC.
120        framebuffer_close(mFbDev);
121        mFbDev = NULL;
122    }
123
124    // If we have no HWC, or a pre-1.1 HWC, an FB dev is mandatory.
125    if ((!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
126            && !mFbDev) {
127        ALOGE("ERROR: failed to open framebuffer, aborting");
128        abort();
129    }
130
131    if (mHwc) {
132        ALOGI("Using %s version %u.%u", HWC_HARDWARE_COMPOSER,
133              (hwcApiVersion(mHwc) >> 24) & 0xff,
134              (hwcApiVersion(mHwc) >> 16) & 0xff);
135        if (mHwc->registerProcs) {
136            mCBContext->hwc = this;
137            mCBContext->procs.invalidate = &hook_invalidate;
138            mCBContext->procs.vsync = &hook_vsync;
139            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
140                mCBContext->procs.hotplug = &hook_hotplug;
141            else
142                mCBContext->procs.hotplug = NULL;
143            memset(mCBContext->procs.zero, 0, sizeof(mCBContext->procs.zero));
144            mHwc->registerProcs(mHwc, &mCBContext->procs);
145        }
146
147        // don't need a vsync thread if we have a hardware composer
148        needVSyncThread = false;
149        // always turn vsync off when we start
150        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
151
152        // these IDs are always reserved
153        for (size_t i=0 ; i<HWC_NUM_DISPLAY_TYPES ; i++) {
154            mAllocatedDisplayIDs.markBit(i);
155        }
156
157        // the number of displays we actually have depends on the
158        // hw composer version
159        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
160            // 1.2 adds support for virtual displays
161            mNumDisplays = MAX_DISPLAYS;
162        } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
163            // 1.1 adds support for multiple displays
164            mNumDisplays = HWC_NUM_DISPLAY_TYPES;
165        } else {
166            mNumDisplays = 1;
167        }
168    }
169
170    if (mFbDev) {
171        ALOG_ASSERT(!(mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)),
172                "should only have fbdev if no hwc or hwc is 1.0");
173
174        DisplayData& disp(mDisplayData[HWC_DISPLAY_PRIMARY]);
175        disp.width = mFbDev->width;
176        disp.height = mFbDev->height;
177        disp.format = mFbDev->format;
178        disp.xdpi = mFbDev->xdpi;
179        disp.ydpi = mFbDev->ydpi;
180        if (disp.refresh == 0) {
181            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
182            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
183        }
184        if (disp.refresh == 0) {
185            disp.refresh = nsecs_t(1e9 / 60.0);
186            ALOGW("getting VSYNC period from thin air: %lld",
187                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
188        }
189    } else if (mHwc) {
190        // here we're guaranteed to have at least HWC 1.1
191        for (size_t i =0 ; i<HWC_NUM_DISPLAY_TYPES ; i++) {
192            queryDisplayProperties(i);
193        }
194    }
195
196    if (needVSyncThread) {
197        // we don't have VSYNC support, we need to fake it
198        mVSyncThread = new VSyncThread(*this);
199    }
200}
201
202HWComposer::~HWComposer() {
203    if (mHwc) {
204        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
205    }
206    if (mVSyncThread != NULL) {
207        mVSyncThread->requestExitAndWait();
208    }
209    if (mHwc) {
210        hwc_close_1(mHwc);
211    }
212    if (mFbDev) {
213        framebuffer_close(mFbDev);
214    }
215    delete mCBContext;
216}
217
218// Load and prepare the hardware composer module.  Sets mHwc.
219void HWComposer::loadHwcModule()
220{
221    hw_module_t const* module;
222
223    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
224        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
225        return;
226    }
227
228    int err = hwc_open_1(module, &mHwc);
229    if (err) {
230        ALOGE("%s device failed to initialize (%s)",
231              HWC_HARDWARE_COMPOSER, strerror(-err));
232        return;
233    }
234
235    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
236            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
237            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
238        ALOGE("%s device version %#x unsupported, will not be used",
239              HWC_HARDWARE_COMPOSER, mHwc->common.version);
240        hwc_close_1(mHwc);
241        mHwc = NULL;
242        return;
243    }
244}
245
246// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
247void HWComposer::loadFbHalModule()
248{
249    hw_module_t const* module;
250
251    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) != 0) {
252        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
253        return;
254    }
255
256    int err = framebuffer_open(module, &mFbDev);
257    if (err) {
258        ALOGE("framebuffer_open failed (%s)", strerror(-err));
259        return;
260    }
261}
262
263status_t HWComposer::initCheck() const {
264    return mHwc ? NO_ERROR : NO_INIT;
265}
266
267void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
268    cb_context* ctx = reinterpret_cast<cb_context*>(
269            const_cast<hwc_procs_t*>(procs));
270    ctx->hwc->invalidate();
271}
272
273void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
274        int64_t timestamp) {
275    cb_context* ctx = reinterpret_cast<cb_context*>(
276            const_cast<hwc_procs_t*>(procs));
277    ctx->hwc->vsync(disp, timestamp);
278}
279
280void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
281        int connected) {
282    cb_context* ctx = reinterpret_cast<cb_context*>(
283            const_cast<hwc_procs_t*>(procs));
284    ctx->hwc->hotplug(disp, connected);
285}
286
287void HWComposer::invalidate() {
288    mFlinger->repaintEverything();
289}
290
291void HWComposer::vsync(int disp, int64_t timestamp) {
292    ATRACE_INT("VSYNC", ++mVSyncCount&1);
293    mEventHandler.onVSyncReceived(disp, timestamp);
294    Mutex::Autolock _l(mLock);
295    mLastHwVSync = timestamp;
296}
297
298void HWComposer::hotplug(int disp, int connected) {
299    if (disp == HWC_DISPLAY_PRIMARY || disp >= HWC_NUM_DISPLAY_TYPES) {
300        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
301                disp, connected);
302        return;
303    }
304    queryDisplayProperties(disp);
305    mEventHandler.onHotplugReceived(disp, bool(connected));
306}
307
308static const uint32_t DISPLAY_ATTRIBUTES[] = {
309    HWC_DISPLAY_VSYNC_PERIOD,
310    HWC_DISPLAY_WIDTH,
311    HWC_DISPLAY_HEIGHT,
312    HWC_DISPLAY_DPI_X,
313    HWC_DISPLAY_DPI_Y,
314    HWC_DISPLAY_NO_ATTRIBUTE,
315};
316#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
317
318// http://developer.android.com/reference/android/util/DisplayMetrics.html
319#define ANDROID_DENSITY_TV    213
320#define ANDROID_DENSITY_XHIGH 320
321
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    mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
340
341    int32_t w = 0, h = 0;
342    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
343        switch (DISPLAY_ATTRIBUTES[i]) {
344        case HWC_DISPLAY_VSYNC_PERIOD:
345            mDisplayData[disp].refresh = nsecs_t(values[i]);
346            break;
347        case HWC_DISPLAY_WIDTH:
348            mDisplayData[disp].width = values[i];
349            break;
350        case HWC_DISPLAY_HEIGHT:
351            mDisplayData[disp].height = values[i];
352            break;
353        case HWC_DISPLAY_DPI_X:
354            mDisplayData[disp].xdpi = values[i] / 1000.0f;
355            break;
356        case HWC_DISPLAY_DPI_Y:
357            mDisplayData[disp].ydpi = values[i] / 1000.0f;
358            break;
359        default:
360            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
361                    i, DISPLAY_ATTRIBUTES[i]);
362            break;
363        }
364    }
365
366    // FIXME: what should we set the format to?
367    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
368    mDisplayData[disp].connected = true;
369    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
370        // is there anything smarter we can do?
371        if (h >= 1080) {
372            mDisplayData[disp].xdpi = ANDROID_DENSITY_XHIGH;
373            mDisplayData[disp].ydpi = ANDROID_DENSITY_XHIGH;
374        } else {
375            mDisplayData[disp].xdpi = ANDROID_DENSITY_TV;
376            mDisplayData[disp].ydpi = ANDROID_DENSITY_TV;
377        }
378    }
379    return NO_ERROR;
380}
381
382int32_t HWComposer::allocateDisplayId() {
383    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
384        return NO_MEMORY;
385    }
386    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
387    mAllocatedDisplayIDs.markBit(id);
388    return id;
389}
390
391status_t HWComposer::freeDisplayId(int32_t id) {
392    if (id < HWC_NUM_DISPLAY_TYPES) {
393        // cannot free the reserved IDs
394        return BAD_VALUE;
395    }
396    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
397        return BAD_INDEX;
398    }
399    mAllocatedDisplayIDs.clearBit(id);
400    return NO_ERROR;
401}
402
403nsecs_t HWComposer::getRefreshPeriod(int disp) const {
404    return mDisplayData[disp].refresh;
405}
406
407nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
408    // this returns the last refresh timestamp.
409    // if the last one is not available, we estimate it based on
410    // the refresh period and whatever closest timestamp we have.
411    Mutex::Autolock _l(mLock);
412    nsecs_t now = systemTime(CLOCK_MONOTONIC);
413    return now - ((now - mLastHwVSync) %  mDisplayData[disp].refresh);
414}
415
416uint32_t HWComposer::getWidth(int disp) const {
417    return mDisplayData[disp].width;
418}
419
420uint32_t HWComposer::getHeight(int disp) const {
421    return mDisplayData[disp].height;
422}
423
424uint32_t HWComposer::getFormat(int disp) const {
425    return mDisplayData[disp].format;
426}
427
428float HWComposer::getDpiX(int disp) const {
429    return mDisplayData[disp].xdpi;
430}
431
432float HWComposer::getDpiY(int disp) const {
433    return mDisplayData[disp].ydpi;
434}
435
436bool HWComposer::isConnected(int disp) const {
437    return mDisplayData[disp].connected;
438}
439
440void HWComposer::eventControl(int event, int enabled) {
441    status_t err = NO_ERROR;
442    if (mHwc) {
443        if (!mDebugForceFakeVSync) {
444            err = mHwc->eventControl(mHwc, 0, event, enabled);
445            // error here should not happen -- not sure what we should
446            // do if it does.
447            ALOGE_IF(err, "eventControl(%d, %d) failed %s",
448                    event, enabled, strerror(-err));
449        }
450    }
451
452    if (err == NO_ERROR && mVSyncThread != NULL) {
453        mVSyncThread->setEnabled(enabled);
454    }
455}
456
457status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
458    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
459        return BAD_INDEX;
460    }
461
462    if (mHwc) {
463        DisplayData& disp(mDisplayData[id]);
464        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
465            // we need space for the HWC_FRAMEBUFFER_TARGET
466            numLayers++;
467        }
468        if (disp.capacity < numLayers || disp.list == NULL) {
469            size_t size = sizeof(hwc_display_contents_1_t)
470                    + numLayers * sizeof(hwc_layer_1_t);
471            free(disp.list);
472            disp.list = (hwc_display_contents_1_t*)malloc(size);
473            disp.capacity = numLayers;
474        }
475        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
476            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
477            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
478            const hwc_rect_t r = { 0, 0, disp.width, disp.height };
479            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
480            disp.framebufferTarget->hints = 0;
481            disp.framebufferTarget->flags = 0;
482            disp.framebufferTarget->handle = disp.fbTargetHandle;
483            disp.framebufferTarget->transform = 0;
484            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
485            disp.framebufferTarget->sourceCrop = r;
486            disp.framebufferTarget->displayFrame = r;
487            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
488            disp.framebufferTarget->visibleRegionScreen.rects =
489                &disp.framebufferTarget->displayFrame;
490            disp.framebufferTarget->acquireFenceFd = -1;
491            disp.framebufferTarget->releaseFenceFd = -1;
492        }
493        disp.list->retireFenceFd = -1;
494        disp.list->flags = HWC_GEOMETRY_CHANGED;
495        disp.list->numHwLayers = numLayers;
496    }
497    return NO_ERROR;
498}
499
500status_t HWComposer::setFramebufferTarget(int32_t id,
501        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
502    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
503        return BAD_INDEX;
504    }
505    DisplayData& disp(mDisplayData[id]);
506    if (!disp.framebufferTarget) {
507        // this should never happen, but apparently eglCreateWindowSurface()
508        // triggers a SurfaceTextureClient::queueBuffer()  on some
509        // devices (!?) -- log and ignore.
510        ALOGE("HWComposer: framebufferTarget is null");
511//        CallStack stack;
512//        stack.update();
513//        stack.dump("");
514        return NO_ERROR;
515    }
516
517    int acquireFenceFd = -1;
518    if (acquireFence != NULL) {
519        acquireFenceFd = acquireFence->dup();
520    }
521
522    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
523    disp.fbTargetHandle = buf->handle;
524    disp.framebufferTarget->handle = disp.fbTargetHandle;
525    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
526    return NO_ERROR;
527}
528
529status_t HWComposer::prepare() {
530    for (size_t i=0 ; i<mNumDisplays ; i++) {
531        DisplayData& disp(mDisplayData[i]);
532        if (disp.framebufferTarget) {
533            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
534            // DO NOT reset the handle field to NULL, because it's possible
535            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
536            // in which case, we should continue to use the same buffer.
537            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
538        }
539        mLists[i] = disp.list;
540        if (mLists[i]) {
541            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
542                mLists[i]->outbuf = NULL;
543                mLists[i]->outbufAcquireFenceFd = -1;
544            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
545                // garbage data to catch improper use
546                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
547                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
548            } else {
549                mLists[i]->dpy = EGL_NO_DISPLAY;
550                mLists[i]->sur = EGL_NO_SURFACE;
551            }
552        }
553    }
554
555    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
556    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
557
558    if (err == NO_ERROR) {
559        // here we're just making sure that "skip" layers are set
560        // to HWC_FRAMEBUFFER and we're also counting how many layers
561        // we have of each type.
562        for (size_t i=0 ; i<mNumDisplays ; i++) {
563            DisplayData& disp(mDisplayData[i]);
564            disp.hasFbComp = false;
565            disp.hasOvComp = false;
566            if (disp.list) {
567                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
568                    hwc_layer_1_t& l = disp.list->hwLayers[i];
569
570                    //ALOGD("prepare: %d, type=%d, handle=%p",
571                    //        i, l.compositionType, l.handle);
572
573                    if (l.flags & HWC_SKIP_LAYER) {
574                        l.compositionType = HWC_FRAMEBUFFER;
575                    }
576                    if (l.compositionType == HWC_FRAMEBUFFER) {
577                        disp.hasFbComp = true;
578                    }
579                    if (l.compositionType == HWC_OVERLAY) {
580                        disp.hasOvComp = true;
581                    }
582                }
583            }
584        }
585    }
586    return (status_t)err;
587}
588
589bool HWComposer::hasHwcComposition(int32_t id) const {
590    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
591        return false;
592    return mDisplayData[id].hasOvComp;
593}
594
595bool HWComposer::hasGlesComposition(int32_t id) const {
596    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
597        return false;
598    return mDisplayData[id].hasFbComp;
599}
600
601int HWComposer::getAndResetReleaseFenceFd(int32_t id) {
602    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
603        return BAD_INDEX;
604
605    int fd = INVALID_OPERATION;
606    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
607        const DisplayData& disp(mDisplayData[id]);
608        if (disp.framebufferTarget) {
609            fd = disp.framebufferTarget->releaseFenceFd;
610            disp.framebufferTarget->releaseFenceFd = -1;
611        }
612    }
613    return fd;
614}
615
616status_t HWComposer::commit() {
617    int err = NO_ERROR;
618    if (mHwc) {
619        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
620            // On version 1.0, the OpenGL ES target surface is communicated
621            // by the (dpy, sur) fields and we are guaranteed to have only
622            // a single display.
623            mLists[0]->dpy = eglGetCurrentDisplay();
624            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
625        }
626
627        err = mHwc->set(mHwc, mNumDisplays, mLists);
628
629        for (size_t i=0 ; i<mNumDisplays ; i++) {
630            DisplayData& disp(mDisplayData[i]);
631            if (disp.list) {
632                if (disp.list->retireFenceFd != -1) {
633                    close(disp.list->retireFenceFd);
634                    disp.list->retireFenceFd = -1;
635                }
636                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
637            }
638        }
639    }
640    return (status_t)err;
641}
642
643status_t HWComposer::release() const {
644    if (mHwc) {
645        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
646        return (status_t)mHwc->blank(mHwc, 0, 1);
647    }
648    return NO_ERROR;
649}
650
651status_t HWComposer::acquire() const {
652    if (mHwc) {
653        return (status_t)mHwc->blank(mHwc, 0, 0);
654    }
655    return NO_ERROR;
656}
657
658int HWComposer::getVisualID() const {
659    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
660        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
661        // is supported by the implementation. we can only be in this case
662        // if we have HWC 1.1
663        return HAL_PIXEL_FORMAT_RGBA_8888;
664        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
665    } else {
666        return mFbDev->format;
667    }
668}
669
670bool HWComposer::supportsFramebufferTarget() const {
671    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
672}
673
674int HWComposer::fbPost(int32_t id,
675        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
676    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
677        return setFramebufferTarget(id, acquireFence, buffer);
678    } else {
679        if (acquireFence != NULL) {
680            acquireFence->wait(Fence::TIMEOUT_NEVER);
681        }
682        return mFbDev->post(mFbDev, buffer->handle);
683    }
684}
685
686int HWComposer::fbCompositionComplete() {
687    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
688        return NO_ERROR;
689
690    if (mFbDev->compositionComplete) {
691        return mFbDev->compositionComplete(mFbDev);
692    } else {
693        return INVALID_OPERATION;
694    }
695}
696
697void HWComposer::fbDump(String8& result) {
698    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
699        const size_t SIZE = 4096;
700        char buffer[SIZE];
701        mFbDev->dump(mFbDev, buffer, SIZE);
702        result.append(buffer);
703    }
704}
705
706/*
707 * Helper template to implement a concrete HWCLayer
708 * This holds the pointer to the concrete hwc layer type
709 * and implements the "iterable" side of HWCLayer.
710 */
711template<typename CONCRETE, typename HWCTYPE>
712class Iterable : public HWComposer::HWCLayer {
713protected:
714    HWCTYPE* const mLayerList;
715    HWCTYPE* mCurrentLayer;
716    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
717    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
718    inline HWCTYPE* getLayer() { return mCurrentLayer; }
719    virtual ~Iterable() { }
720private:
721    // returns a copy of ourselves
722    virtual HWComposer::HWCLayer* dup() {
723        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
724    }
725    virtual status_t setLayer(size_t index) {
726        mCurrentLayer = &mLayerList[index];
727        return NO_ERROR;
728    }
729};
730
731/*
732 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
733 * This implements the HWCLayer side of HWCIterableLayer.
734 */
735class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
736public:
737    HWCLayerVersion1(hwc_layer_1_t* layer)
738        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer) { }
739
740    virtual int32_t getCompositionType() const {
741        return getLayer()->compositionType;
742    }
743    virtual uint32_t getHints() const {
744        return getLayer()->hints;
745    }
746    virtual int getAndResetReleaseFenceFd() {
747        int fd = getLayer()->releaseFenceFd;
748        getLayer()->releaseFenceFd = -1;
749        return fd;
750    }
751    virtual void setAcquireFenceFd(int fenceFd) {
752        getLayer()->acquireFenceFd = fenceFd;
753    }
754
755    virtual void setDefaultState() {
756        getLayer()->compositionType = HWC_FRAMEBUFFER;
757        getLayer()->hints = 0;
758        getLayer()->flags = HWC_SKIP_LAYER;
759        getLayer()->handle = 0;
760        getLayer()->transform = 0;
761        getLayer()->blending = HWC_BLENDING_NONE;
762        getLayer()->visibleRegionScreen.numRects = 0;
763        getLayer()->visibleRegionScreen.rects = NULL;
764        getLayer()->acquireFenceFd = -1;
765        getLayer()->releaseFenceFd = -1;
766    }
767    virtual void setSkip(bool skip) {
768        if (skip) {
769            getLayer()->flags |= HWC_SKIP_LAYER;
770        } else {
771            getLayer()->flags &= ~HWC_SKIP_LAYER;
772        }
773    }
774    virtual void setBlending(uint32_t blending) {
775        getLayer()->blending = blending;
776    }
777    virtual void setTransform(uint32_t transform) {
778        getLayer()->transform = transform;
779    }
780    virtual void setFrame(const Rect& frame) {
781        reinterpret_cast<Rect&>(getLayer()->displayFrame) = frame;
782    }
783    virtual void setCrop(const Rect& crop) {
784        reinterpret_cast<Rect&>(getLayer()->sourceCrop) = crop;
785    }
786    virtual void setVisibleRegionScreen(const Region& reg) {
787        // Region::getSharedBuffer creates a reference to the underlying
788        // SharedBuffer of this Region, this reference is freed
789        // in onDisplayed()
790        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
791        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
792        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
793    }
794    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
795        if (buffer == 0 || buffer->handle == 0) {
796            getLayer()->compositionType = HWC_FRAMEBUFFER;
797            getLayer()->flags |= HWC_SKIP_LAYER;
798            getLayer()->handle = 0;
799        } else {
800            getLayer()->handle = buffer->handle;
801        }
802    }
803    virtual void onDisplayed() {
804        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
805        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
806        if (sb) {
807            sb->release();
808            // not technically needed but safer
809            visibleRegion.numRects = 0;
810            visibleRegion.rects = NULL;
811        }
812
813        getLayer()->acquireFenceFd = -1;
814    }
815};
816
817/*
818 * returns an iterator initialized at a given index in the layer list
819 */
820HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
821    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
822        return LayerListIterator();
823    }
824    const DisplayData& disp(mDisplayData[id]);
825    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
826        return LayerListIterator();
827    }
828    return LayerListIterator(new HWCLayerVersion1(disp.list->hwLayers), index);
829}
830
831/*
832 * returns an iterator on the beginning of the layer list
833 */
834HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
835    return getLayerIterator(id, 0);
836}
837
838/*
839 * returns an iterator on the end of the layer list
840 */
841HWComposer::LayerListIterator HWComposer::end(int32_t id) {
842    size_t numLayers = 0;
843    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
844        const DisplayData& disp(mDisplayData[id]);
845        if (mHwc && disp.list) {
846            numLayers = disp.list->numHwLayers;
847            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
848                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
849                // which we ignore when iterating through the layer list.
850                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
851                if (numLayers) {
852                    numLayers--;
853                }
854            }
855        }
856    }
857    return getLayerIterator(id, numLayers);
858}
859
860void HWComposer::dump(String8& result, char* buffer, size_t SIZE,
861        const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const {
862    if (mHwc) {
863        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
864        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
865        for (size_t i=0 ; i<mNumDisplays ; i++) {
866            const DisplayData& disp(mDisplayData[i]);
867            if (disp.list) {
868                result.appendFormat("  id=%d, numHwLayers=%u, flags=%08x\n",
869                        i, disp.list->numHwLayers, disp.list->flags);
870                result.append(
871                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
872                        "------------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
873                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
874                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
875                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
876                    int32_t format = -1;
877                    String8 name("unknown");
878                    if (i < visibleLayersSortedByZ.size()) {
879                        const sp<LayerBase>& layer(visibleLayersSortedByZ[i]);
880                        if (layer->getLayer() != NULL) {
881                            const sp<GraphicBuffer>& buffer(
882                                layer->getLayer()->getActiveBuffer());
883                            if (buffer != NULL) {
884                                format = buffer->getPixelFormat();
885                            }
886                        }
887                        name = layer->getName();
888                    }
889
890                    int type = l.compositionType;
891                    if (type == HWC_FRAMEBUFFER_TARGET) {
892                        name = "HWC_FRAMEBUFFER_TARGET";
893                        format = disp.format;
894                    }
895
896                    static char const* compositionTypeName[] = {
897                            "GLES",
898                            "HWC",
899                            "BACKGROUND",
900                            "FB TARGET",
901                            "UNKNOWN"};
902                    if (type >= NELEM(compositionTypeName))
903                        type = NELEM(compositionTypeName) - 1;
904
905                    result.appendFormat(
906                            " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
907                                    compositionTypeName[type],
908                                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
909                                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
910                                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
911                                    name.string());
912                }
913            }
914        }
915    }
916
917    if (mHwc && mHwc->dump) {
918        mHwc->dump(mHwc, buffer, SIZE);
919        result.append(buffer);
920    }
921}
922
923// ---------------------------------------------------------------------------
924
925HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
926    : mHwc(hwc), mEnabled(false),
927      mNextFakeVSync(0),
928      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
929{
930}
931
932void HWComposer::VSyncThread::setEnabled(bool enabled) {
933    Mutex::Autolock _l(mLock);
934    mEnabled = enabled;
935    mCondition.signal();
936}
937
938void HWComposer::VSyncThread::onFirstRef() {
939    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
940}
941
942bool HWComposer::VSyncThread::threadLoop() {
943    { // scope for lock
944        Mutex::Autolock _l(mLock);
945        while (!mEnabled) {
946            mCondition.wait(mLock);
947        }
948    }
949
950    const nsecs_t period = mRefreshPeriod;
951    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
952    nsecs_t next_vsync = mNextFakeVSync;
953    nsecs_t sleep = next_vsync - now;
954    if (sleep < 0) {
955        // we missed, find where the next vsync should be
956        sleep = (period - ((now - next_vsync) % period));
957        next_vsync = now + sleep;
958    }
959    mNextFakeVSync = next_vsync + period;
960
961    struct timespec spec;
962    spec.tv_sec  = next_vsync / 1000000000;
963    spec.tv_nsec = next_vsync % 1000000000;
964
965    int err;
966    do {
967        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
968    } while (err<0 && errno == EINTR);
969
970    if (err == 0) {
971        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
972    }
973
974    return true;
975}
976
977// ---------------------------------------------------------------------------
978}; // namespace android
979