HWComposer.cpp revision 27ec5739bc05330e08b02f25b62a8f597bad897a 
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.connected = true;
176        disp.width = mFbDev->width;
177        disp.height = mFbDev->height;
178        disp.format = mFbDev->format;
179        disp.xdpi = mFbDev->xdpi;
180        disp.ydpi = mFbDev->ydpi;
181        if (disp.refresh == 0) {
182            disp.refresh = nsecs_t(1e9 / mFbDev->fps);
183            ALOGW("getting VSYNC period from fb HAL: %lld", disp.refresh);
184        }
185        if (disp.refresh == 0) {
186            disp.refresh = nsecs_t(1e9 / 60.0);
187            ALOGW("getting VSYNC period from thin air: %lld",
188                    mDisplayData[HWC_DISPLAY_PRIMARY].refresh);
189        }
190    } else if (mHwc) {
191        // here we're guaranteed to have at least HWC 1.1
192        for (size_t i =0 ; i<HWC_NUM_DISPLAY_TYPES ; i++) {
193            queryDisplayProperties(i);
194        }
195    }
196
197    if (needVSyncThread) {
198        // we don't have VSYNC support, we need to fake it
199        mVSyncThread = new VSyncThread(*this);
200    }
201}
202
203HWComposer::~HWComposer() {
204    if (mHwc) {
205        mHwc->eventControl(mHwc, HWC_DISPLAY_PRIMARY, HWC_EVENT_VSYNC, 0);
206    }
207    if (mVSyncThread != NULL) {
208        mVSyncThread->requestExitAndWait();
209    }
210    if (mHwc) {
211        hwc_close_1(mHwc);
212    }
213    if (mFbDev) {
214        framebuffer_close(mFbDev);
215    }
216    delete mCBContext;
217}
218
219// Load and prepare the hardware composer module.  Sets mHwc.
220void HWComposer::loadHwcModule()
221{
222    hw_module_t const* module;
223
224    if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
225        ALOGE("%s module not found", HWC_HARDWARE_MODULE_ID);
226        return;
227    }
228
229    int err = hwc_open_1(module, &mHwc);
230    if (err) {
231        ALOGE("%s device failed to initialize (%s)",
232              HWC_HARDWARE_COMPOSER, strerror(-err));
233        return;
234    }
235
236    if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_0) ||
237            hwcHeaderVersion(mHwc) < MIN_HWC_HEADER_VERSION ||
238            hwcHeaderVersion(mHwc) > HWC_HEADER_VERSION) {
239        ALOGE("%s device version %#x unsupported, will not be used",
240              HWC_HARDWARE_COMPOSER, mHwc->common.version);
241        hwc_close_1(mHwc);
242        mHwc = NULL;
243        return;
244    }
245}
246
247// Load and prepare the FB HAL, which uses the gralloc module.  Sets mFbDev.
248void HWComposer::loadFbHalModule()
249{
250    hw_module_t const* module;
251
252    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) != 0) {
253        ALOGE("%s module not found", GRALLOC_HARDWARE_MODULE_ID);
254        return;
255    }
256
257    int err = framebuffer_open(module, &mFbDev);
258    if (err) {
259        ALOGE("framebuffer_open failed (%s)", strerror(-err));
260        return;
261    }
262}
263
264status_t HWComposer::initCheck() const {
265    return mHwc ? NO_ERROR : NO_INIT;
266}
267
268void HWComposer::hook_invalidate(const struct hwc_procs* procs) {
269    cb_context* ctx = reinterpret_cast<cb_context*>(
270            const_cast<hwc_procs_t*>(procs));
271    ctx->hwc->invalidate();
272}
273
274void HWComposer::hook_vsync(const struct hwc_procs* procs, int disp,
275        int64_t timestamp) {
276    cb_context* ctx = reinterpret_cast<cb_context*>(
277            const_cast<hwc_procs_t*>(procs));
278    ctx->hwc->vsync(disp, timestamp);
279}
280
281void HWComposer::hook_hotplug(const struct hwc_procs* procs, int disp,
282        int connected) {
283    cb_context* ctx = reinterpret_cast<cb_context*>(
284            const_cast<hwc_procs_t*>(procs));
285    ctx->hwc->hotplug(disp, connected);
286}
287
288void HWComposer::invalidate() {
289    mFlinger->repaintEverything();
290}
291
292void HWComposer::vsync(int disp, int64_t timestamp) {
293    ATRACE_INT("VSYNC", ++mVSyncCount&1);
294    mEventHandler.onVSyncReceived(disp, timestamp);
295    Mutex::Autolock _l(mLock);
296    mLastHwVSync = timestamp;
297}
298
299void HWComposer::hotplug(int disp, int connected) {
300    if (disp == HWC_DISPLAY_PRIMARY || disp >= HWC_NUM_DISPLAY_TYPES) {
301        ALOGE("hotplug event received for invalid display: disp=%d connected=%d",
302                disp, connected);
303        return;
304    }
305    queryDisplayProperties(disp);
306    mEventHandler.onHotplugReceived(disp, bool(connected));
307}
308
309static const uint32_t DISPLAY_ATTRIBUTES[] = {
310    HWC_DISPLAY_VSYNC_PERIOD,
311    HWC_DISPLAY_WIDTH,
312    HWC_DISPLAY_HEIGHT,
313    HWC_DISPLAY_DPI_X,
314    HWC_DISPLAY_DPI_Y,
315    HWC_DISPLAY_NO_ATTRIBUTE,
316};
317#define NUM_DISPLAY_ATTRIBUTES (sizeof(DISPLAY_ATTRIBUTES) / sizeof(DISPLAY_ATTRIBUTES)[0])
318
319// http://developer.android.com/reference/android/util/DisplayMetrics.html
320#define ANDROID_DENSITY_TV    213
321#define ANDROID_DENSITY_XHIGH 320
322
323status_t HWComposer::queryDisplayProperties(int disp) {
324
325    LOG_ALWAYS_FATAL_IF(!mHwc || !hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
326
327    // use zero as default value for unspecified attributes
328    int32_t values[NUM_DISPLAY_ATTRIBUTES - 1];
329    memset(values, 0, sizeof(values));
330
331    uint32_t config;
332    size_t numConfigs = 1;
333    status_t err = mHwc->getDisplayConfigs(mHwc, disp, &config, &numConfigs);
334    if (err != NO_ERROR) {
335        // this can happen if an unpluggable display is not connected
336        mDisplayData[disp].connected = false;
337        return err;
338    }
339
340    err = mHwc->getDisplayAttributes(mHwc, disp, config, DISPLAY_ATTRIBUTES, values);
341    if (err != NO_ERROR) {
342        // we can't get this display's info. turn it off.
343        mDisplayData[disp].connected = false;
344        return err;
345    }
346
347    int32_t w = 0, h = 0;
348    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
349        switch (DISPLAY_ATTRIBUTES[i]) {
350        case HWC_DISPLAY_VSYNC_PERIOD:
351            mDisplayData[disp].refresh = nsecs_t(values[i]);
352            break;
353        case HWC_DISPLAY_WIDTH:
354            mDisplayData[disp].width = values[i];
355            break;
356        case HWC_DISPLAY_HEIGHT:
357            mDisplayData[disp].height = values[i];
358            break;
359        case HWC_DISPLAY_DPI_X:
360            mDisplayData[disp].xdpi = values[i] / 1000.0f;
361            break;
362        case HWC_DISPLAY_DPI_Y:
363            mDisplayData[disp].ydpi = values[i] / 1000.0f;
364            break;
365        default:
366            ALOG_ASSERT(false, "unknown display attribute[%d] %#x",
367                    i, DISPLAY_ATTRIBUTES[i]);
368            break;
369        }
370    }
371
372    // FIXME: what should we set the format to?
373    mDisplayData[disp].format = HAL_PIXEL_FORMAT_RGBA_8888;
374    mDisplayData[disp].connected = true;
375    if (mDisplayData[disp].xdpi == 0.0f || mDisplayData[disp].ydpi == 0.0f) {
376        // is there anything smarter we can do?
377        if (h >= 1080) {
378            mDisplayData[disp].xdpi = ANDROID_DENSITY_XHIGH;
379            mDisplayData[disp].ydpi = ANDROID_DENSITY_XHIGH;
380        } else {
381            mDisplayData[disp].xdpi = ANDROID_DENSITY_TV;
382            mDisplayData[disp].ydpi = ANDROID_DENSITY_TV;
383        }
384    }
385    return NO_ERROR;
386}
387
388int32_t HWComposer::allocateDisplayId() {
389    if (mAllocatedDisplayIDs.count() >= mNumDisplays) {
390        return NO_MEMORY;
391    }
392    int32_t id = mAllocatedDisplayIDs.firstUnmarkedBit();
393    mAllocatedDisplayIDs.markBit(id);
394    return id;
395}
396
397status_t HWComposer::freeDisplayId(int32_t id) {
398    if (id < HWC_NUM_DISPLAY_TYPES) {
399        // cannot free the reserved IDs
400        return BAD_VALUE;
401    }
402    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
403        return BAD_INDEX;
404    }
405    mAllocatedDisplayIDs.clearBit(id);
406    return NO_ERROR;
407}
408
409nsecs_t HWComposer::getRefreshPeriod(int disp) const {
410    return mDisplayData[disp].refresh;
411}
412
413nsecs_t HWComposer::getRefreshTimestamp(int disp) const {
414    // this returns the last refresh timestamp.
415    // if the last one is not available, we estimate it based on
416    // the refresh period and whatever closest timestamp we have.
417    Mutex::Autolock _l(mLock);
418    nsecs_t now = systemTime(CLOCK_MONOTONIC);
419    return now - ((now - mLastHwVSync) %  mDisplayData[disp].refresh);
420}
421
422uint32_t HWComposer::getWidth(int disp) const {
423    return mDisplayData[disp].width;
424}
425
426uint32_t HWComposer::getHeight(int disp) const {
427    return mDisplayData[disp].height;
428}
429
430uint32_t HWComposer::getFormat(int disp) const {
431    return mDisplayData[disp].format;
432}
433
434float HWComposer::getDpiX(int disp) const {
435    return mDisplayData[disp].xdpi;
436}
437
438float HWComposer::getDpiY(int disp) const {
439    return mDisplayData[disp].ydpi;
440}
441
442bool HWComposer::isConnected(int disp) const {
443    return mDisplayData[disp].connected;
444}
445
446void HWComposer::eventControl(int event, int enabled) {
447    status_t err = NO_ERROR;
448    if (mHwc) {
449        if (!mDebugForceFakeVSync) {
450            err = mHwc->eventControl(mHwc, 0, event, enabled);
451            // error here should not happen -- not sure what we should
452            // do if it does.
453            ALOGE_IF(err, "eventControl(%d, %d) failed %s",
454                    event, enabled, strerror(-err));
455        }
456    }
457
458    if (err == NO_ERROR && mVSyncThread != NULL) {
459        mVSyncThread->setEnabled(enabled);
460    }
461}
462
463status_t HWComposer::createWorkList(int32_t id, size_t numLayers) {
464    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
465        return BAD_INDEX;
466    }
467
468    if (mHwc) {
469        DisplayData& disp(mDisplayData[id]);
470        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
471            // we need space for the HWC_FRAMEBUFFER_TARGET
472            numLayers++;
473        }
474        if (disp.capacity < numLayers || disp.list == NULL) {
475            size_t size = sizeof(hwc_display_contents_1_t)
476                    + numLayers * sizeof(hwc_layer_1_t);
477            free(disp.list);
478            disp.list = (hwc_display_contents_1_t*)malloc(size);
479            disp.capacity = numLayers;
480        }
481        if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
482            disp.framebufferTarget = &disp.list->hwLayers[numLayers - 1];
483            memset(disp.framebufferTarget, 0, sizeof(hwc_layer_1_t));
484            const hwc_rect_t r = { 0, 0, disp.width, disp.height };
485            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
486            disp.framebufferTarget->hints = 0;
487            disp.framebufferTarget->flags = 0;
488            disp.framebufferTarget->handle = disp.fbTargetHandle;
489            disp.framebufferTarget->transform = 0;
490            disp.framebufferTarget->blending = HWC_BLENDING_PREMULT;
491            disp.framebufferTarget->sourceCrop = r;
492            disp.framebufferTarget->displayFrame = r;
493            disp.framebufferTarget->visibleRegionScreen.numRects = 1;
494            disp.framebufferTarget->visibleRegionScreen.rects =
495                &disp.framebufferTarget->displayFrame;
496            disp.framebufferTarget->acquireFenceFd = -1;
497            disp.framebufferTarget->releaseFenceFd = -1;
498        }
499        disp.list->retireFenceFd = -1;
500        disp.list->flags = HWC_GEOMETRY_CHANGED;
501        disp.list->numHwLayers = numLayers;
502    }
503    return NO_ERROR;
504}
505
506status_t HWComposer::setFramebufferTarget(int32_t id,
507        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buf) {
508    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
509        return BAD_INDEX;
510    }
511    DisplayData& disp(mDisplayData[id]);
512    if (!disp.framebufferTarget) {
513        // this should never happen, but apparently eglCreateWindowSurface()
514        // triggers a SurfaceTextureClient::queueBuffer()  on some
515        // devices (!?) -- log and ignore.
516        ALOGE("HWComposer: framebufferTarget is null");
517//        CallStack stack;
518//        stack.update();
519//        stack.dump("");
520        return NO_ERROR;
521    }
522
523    int acquireFenceFd = -1;
524    if (acquireFence != NULL) {
525        acquireFenceFd = acquireFence->dup();
526    }
527
528    // ALOGD("fbPost: handle=%p, fence=%d", buf->handle, acquireFenceFd);
529    disp.fbTargetHandle = buf->handle;
530    disp.framebufferTarget->handle = disp.fbTargetHandle;
531    disp.framebufferTarget->acquireFenceFd = acquireFenceFd;
532    return NO_ERROR;
533}
534
535status_t HWComposer::prepare() {
536    for (size_t i=0 ; i<mNumDisplays ; i++) {
537        DisplayData& disp(mDisplayData[i]);
538        if (disp.framebufferTarget) {
539            // make sure to reset the type to HWC_FRAMEBUFFER_TARGET
540            // DO NOT reset the handle field to NULL, because it's possible
541            // that we have nothing to redraw (eg: eglSwapBuffers() not called)
542            // in which case, we should continue to use the same buffer.
543            LOG_FATAL_IF(disp.list == NULL);
544            disp.framebufferTarget->compositionType = HWC_FRAMEBUFFER_TARGET;
545        }
546        if (!disp.connected && disp.list != NULL) {
547            ALOGW("WARNING: disp %d: connected, non-null list, layers=%d",
548                  i, disp.list->numHwLayers);
549        }
550        mLists[i] = disp.list;
551        if (mLists[i]) {
552            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_2)) {
553                mLists[i]->outbuf = NULL;
554                mLists[i]->outbufAcquireFenceFd = -1;
555            } else if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
556                // garbage data to catch improper use
557                mLists[i]->dpy = (hwc_display_t)0xDEADBEEF;
558                mLists[i]->sur = (hwc_surface_t)0xDEADBEEF;
559            } else {
560                mLists[i]->dpy = EGL_NO_DISPLAY;
561                mLists[i]->sur = EGL_NO_SURFACE;
562            }
563        }
564    }
565
566    int err = mHwc->prepare(mHwc, mNumDisplays, mLists);
567    ALOGE_IF(err, "HWComposer: prepare failed (%s)", strerror(-err));
568
569    if (err == NO_ERROR) {
570        // here we're just making sure that "skip" layers are set
571        // to HWC_FRAMEBUFFER and we're also counting how many layers
572        // we have of each type.
573        for (size_t i=0 ; i<mNumDisplays ; i++) {
574            DisplayData& disp(mDisplayData[i]);
575            disp.hasFbComp = false;
576            disp.hasOvComp = false;
577            if (disp.list) {
578                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
579                    hwc_layer_1_t& l = disp.list->hwLayers[i];
580
581                    //ALOGD("prepare: %d, type=%d, handle=%p",
582                    //        i, l.compositionType, l.handle);
583
584                    if (l.flags & HWC_SKIP_LAYER) {
585                        l.compositionType = HWC_FRAMEBUFFER;
586                    }
587                    if (l.compositionType == HWC_FRAMEBUFFER) {
588                        disp.hasFbComp = true;
589                    }
590                    if (l.compositionType == HWC_OVERLAY) {
591                        disp.hasOvComp = true;
592                    }
593                }
594            }
595        }
596    }
597    return (status_t)err;
598}
599
600bool HWComposer::hasHwcComposition(int32_t id) const {
601    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
602        return false;
603    return mDisplayData[id].hasOvComp;
604}
605
606bool HWComposer::hasGlesComposition(int32_t id) const {
607    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
608        return false;
609    return mDisplayData[id].hasFbComp;
610}
611
612int HWComposer::getAndResetReleaseFenceFd(int32_t id) {
613    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id))
614        return BAD_INDEX;
615
616    int fd = INVALID_OPERATION;
617    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
618        const DisplayData& disp(mDisplayData[id]);
619        if (disp.framebufferTarget) {
620            fd = disp.framebufferTarget->releaseFenceFd;
621            disp.framebufferTarget->acquireFenceFd = -1;
622            disp.framebufferTarget->releaseFenceFd = -1;
623        }
624    }
625    return fd;
626}
627
628status_t HWComposer::commit() {
629    int err = NO_ERROR;
630    if (mHwc) {
631        if (!hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
632            // On version 1.0, the OpenGL ES target surface is communicated
633            // by the (dpy, sur) fields and we are guaranteed to have only
634            // a single display.
635            mLists[0]->dpy = eglGetCurrentDisplay();
636            mLists[0]->sur = eglGetCurrentSurface(EGL_DRAW);
637        }
638
639        err = mHwc->set(mHwc, mNumDisplays, mLists);
640
641        for (size_t i=0 ; i<mNumDisplays ; i++) {
642            DisplayData& disp(mDisplayData[i]);
643            if (disp.list) {
644                if (disp.list->retireFenceFd != -1) {
645                    close(disp.list->retireFenceFd);
646                    disp.list->retireFenceFd = -1;
647                }
648                disp.list->flags &= ~HWC_GEOMETRY_CHANGED;
649            }
650        }
651    }
652    return (status_t)err;
653}
654
655status_t HWComposer::release(int disp) const {
656    LOG_FATAL_IF(disp >= HWC_NUM_DISPLAY_TYPES);
657    if (mHwc) {
658        mHwc->eventControl(mHwc, disp, HWC_EVENT_VSYNC, 0);
659        return (status_t)mHwc->blank(mHwc, disp, 1);
660    }
661    return NO_ERROR;
662}
663
664status_t HWComposer::acquire(int disp) const {
665    LOG_FATAL_IF(disp >= HWC_NUM_DISPLAY_TYPES);
666    if (mHwc) {
667        return (status_t)mHwc->blank(mHwc, disp, 0);
668    }
669    return NO_ERROR;
670}
671
672void HWComposer::disconnectDisplay(int disp) {
673    LOG_ALWAYS_FATAL_IF(disp < 0 || disp == HWC_DISPLAY_PRIMARY ||
674                        disp >= HWC_NUM_DISPLAY_TYPES);
675    DisplayData& dd(mDisplayData[disp]);
676    if (dd.list != NULL) {
677        free(dd.list);
678        dd.list = NULL;
679        dd.framebufferTarget = NULL;    // points into dd.list
680    }
681}
682
683int HWComposer::getVisualID() const {
684    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
685        // FIXME: temporary hack until HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
686        // is supported by the implementation. we can only be in this case
687        // if we have HWC 1.1
688        return HAL_PIXEL_FORMAT_RGBA_8888;
689        //return HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
690    } else {
691        return mFbDev->format;
692    }
693}
694
695bool HWComposer::supportsFramebufferTarget() const {
696    return (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1));
697}
698
699int HWComposer::fbPost(int32_t id,
700        const sp<Fence>& acquireFence, const sp<GraphicBuffer>& buffer) {
701    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
702        return setFramebufferTarget(id, acquireFence, buffer);
703    } else {
704        if (acquireFence != NULL) {
705            acquireFence->waitForever(1000, "HWComposer::fbPost");
706        }
707        return mFbDev->post(mFbDev, buffer->handle);
708    }
709}
710
711int HWComposer::fbCompositionComplete() {
712    if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1))
713        return NO_ERROR;
714
715    if (mFbDev->compositionComplete) {
716        return mFbDev->compositionComplete(mFbDev);
717    } else {
718        return INVALID_OPERATION;
719    }
720}
721
722void HWComposer::fbDump(String8& result) {
723    if (mFbDev && mFbDev->common.version >= 1 && mFbDev->dump) {
724        const size_t SIZE = 4096;
725        char buffer[SIZE];
726        mFbDev->dump(mFbDev, buffer, SIZE);
727        result.append(buffer);
728    }
729}
730
731/*
732 * Helper template to implement a concrete HWCLayer
733 * This holds the pointer to the concrete hwc layer type
734 * and implements the "iterable" side of HWCLayer.
735 */
736template<typename CONCRETE, typename HWCTYPE>
737class Iterable : public HWComposer::HWCLayer {
738protected:
739    HWCTYPE* const mLayerList;
740    HWCTYPE* mCurrentLayer;
741    Iterable(HWCTYPE* layer) : mLayerList(layer), mCurrentLayer(layer) { }
742    inline HWCTYPE const * getLayer() const { return mCurrentLayer; }
743    inline HWCTYPE* getLayer() { return mCurrentLayer; }
744    virtual ~Iterable() { }
745private:
746    // returns a copy of ourselves
747    virtual HWComposer::HWCLayer* dup() {
748        return new CONCRETE( static_cast<const CONCRETE&>(*this) );
749    }
750    virtual status_t setLayer(size_t index) {
751        mCurrentLayer = &mLayerList[index];
752        return NO_ERROR;
753    }
754};
755
756/*
757 * Concrete implementation of HWCLayer for HWC_DEVICE_API_VERSION_1_0.
758 * This implements the HWCLayer side of HWCIterableLayer.
759 */
760class HWCLayerVersion1 : public Iterable<HWCLayerVersion1, hwc_layer_1_t> {
761public:
762    HWCLayerVersion1(hwc_layer_1_t* layer)
763        : Iterable<HWCLayerVersion1, hwc_layer_1_t>(layer) { }
764
765    virtual int32_t getCompositionType() const {
766        return getLayer()->compositionType;
767    }
768    virtual uint32_t getHints() const {
769        return getLayer()->hints;
770    }
771    virtual int getAndResetReleaseFenceFd() {
772        int fd = getLayer()->releaseFenceFd;
773        getLayer()->releaseFenceFd = -1;
774        return fd;
775    }
776    virtual void setAcquireFenceFd(int fenceFd) {
777        getLayer()->acquireFenceFd = fenceFd;
778    }
779
780    virtual void setDefaultState() {
781        getLayer()->compositionType = HWC_FRAMEBUFFER;
782        getLayer()->hints = 0;
783        getLayer()->flags = HWC_SKIP_LAYER;
784        getLayer()->handle = 0;
785        getLayer()->transform = 0;
786        getLayer()->blending = HWC_BLENDING_NONE;
787        getLayer()->visibleRegionScreen.numRects = 0;
788        getLayer()->visibleRegionScreen.rects = NULL;
789        getLayer()->acquireFenceFd = -1;
790        getLayer()->releaseFenceFd = -1;
791    }
792    virtual void setSkip(bool skip) {
793        if (skip) {
794            getLayer()->flags |= HWC_SKIP_LAYER;
795        } else {
796            getLayer()->flags &= ~HWC_SKIP_LAYER;
797        }
798    }
799    virtual void setBlending(uint32_t blending) {
800        getLayer()->blending = blending;
801    }
802    virtual void setTransform(uint32_t transform) {
803        getLayer()->transform = transform;
804    }
805    virtual void setFrame(const Rect& frame) {
806        reinterpret_cast<Rect&>(getLayer()->displayFrame) = frame;
807    }
808    virtual void setCrop(const Rect& crop) {
809        reinterpret_cast<Rect&>(getLayer()->sourceCrop) = crop;
810    }
811    virtual void setVisibleRegionScreen(const Region& reg) {
812        // Region::getSharedBuffer creates a reference to the underlying
813        // SharedBuffer of this Region, this reference is freed
814        // in onDisplayed()
815        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
816        SharedBuffer const* sb = reg.getSharedBuffer(&visibleRegion.numRects);
817        visibleRegion.rects = reinterpret_cast<hwc_rect_t const *>(sb->data());
818    }
819    virtual void setBuffer(const sp<GraphicBuffer>& buffer) {
820        if (buffer == 0 || buffer->handle == 0) {
821            getLayer()->compositionType = HWC_FRAMEBUFFER;
822            getLayer()->flags |= HWC_SKIP_LAYER;
823            getLayer()->handle = 0;
824        } else {
825            getLayer()->handle = buffer->handle;
826        }
827    }
828    virtual void onDisplayed() {
829        hwc_region_t& visibleRegion = getLayer()->visibleRegionScreen;
830        SharedBuffer const* sb = SharedBuffer::bufferFromData(visibleRegion.rects);
831        if (sb) {
832            sb->release();
833            // not technically needed but safer
834            visibleRegion.numRects = 0;
835            visibleRegion.rects = NULL;
836        }
837
838        getLayer()->acquireFenceFd = -1;
839    }
840};
841
842/*
843 * returns an iterator initialized at a given index in the layer list
844 */
845HWComposer::LayerListIterator HWComposer::getLayerIterator(int32_t id, size_t index) {
846    if (uint32_t(id)>31 || !mAllocatedDisplayIDs.hasBit(id)) {
847        return LayerListIterator();
848    }
849    const DisplayData& disp(mDisplayData[id]);
850    if (!mHwc || !disp.list || index > disp.list->numHwLayers) {
851        return LayerListIterator();
852    }
853    return LayerListIterator(new HWCLayerVersion1(disp.list->hwLayers), index);
854}
855
856/*
857 * returns an iterator on the beginning of the layer list
858 */
859HWComposer::LayerListIterator HWComposer::begin(int32_t id) {
860    return getLayerIterator(id, 0);
861}
862
863/*
864 * returns an iterator on the end of the layer list
865 */
866HWComposer::LayerListIterator HWComposer::end(int32_t id) {
867    size_t numLayers = 0;
868    if (uint32_t(id) <= 31 && mAllocatedDisplayIDs.hasBit(id)) {
869        const DisplayData& disp(mDisplayData[id]);
870        if (mHwc && disp.list) {
871            numLayers = disp.list->numHwLayers;
872            if (hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
873                // with HWC 1.1, the last layer is always the HWC_FRAMEBUFFER_TARGET,
874                // which we ignore when iterating through the layer list.
875                ALOGE_IF(!numLayers, "mDisplayData[%d].list->numHwLayers is 0", id);
876                if (numLayers) {
877                    numLayers--;
878                }
879            }
880        }
881    }
882    return getLayerIterator(id, numLayers);
883}
884
885void HWComposer::dump(String8& result, char* buffer, size_t SIZE,
886        const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const {
887    if (mHwc) {
888        result.appendFormat("Hardware Composer state (version %8x):\n", hwcApiVersion(mHwc));
889        result.appendFormat("  mDebugForceFakeVSync=%d\n", mDebugForceFakeVSync);
890        for (size_t i=0 ; i<mNumDisplays ; i++) {
891            const DisplayData& disp(mDisplayData[i]);
892
893            if (disp.connected) {
894                result.appendFormat(
895                        "  Display[%d] : %ux%u, xdpi=%f, ydpi=%f, refresh=%lld\n",
896                        i, disp.width, disp.height, disp.xdpi, disp.ydpi, disp.refresh);
897            }
898
899            if (disp.list && disp.connected) {
900                result.appendFormat(
901                        "  numHwLayers=%u, flags=%08x\n",
902                        disp.list->numHwLayers, disp.list->flags);
903
904                result.append(
905                        "    type    |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
906                        "------------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
907                //      " __________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
908                for (size_t i=0 ; i<disp.list->numHwLayers ; i++) {
909                    const hwc_layer_1_t&l = disp.list->hwLayers[i];
910                    int32_t format = -1;
911                    String8 name("unknown");
912                    if (i < visibleLayersSortedByZ.size()) {
913                        const sp<LayerBase>& layer(visibleLayersSortedByZ[i]);
914                        if (layer->getLayer() != NULL) {
915                            const sp<GraphicBuffer>& buffer(
916                                layer->getLayer()->getActiveBuffer());
917                            if (buffer != NULL) {
918                                format = buffer->getPixelFormat();
919                            }
920                        }
921                        name = layer->getName();
922                    }
923
924                    int type = l.compositionType;
925                    if (type == HWC_FRAMEBUFFER_TARGET) {
926                        name = "HWC_FRAMEBUFFER_TARGET";
927                        format = disp.format;
928                    }
929
930                    static char const* compositionTypeName[] = {
931                            "GLES",
932                            "HWC",
933                            "BACKGROUND",
934                            "FB TARGET",
935                            "UNKNOWN"};
936                    if (type >= NELEM(compositionTypeName))
937                        type = NELEM(compositionTypeName) - 1;
938
939                    result.appendFormat(
940                            " %10s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
941                                    compositionTypeName[type],
942                                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
943                                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
944                                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
945                                    name.string());
946                }
947            }
948        }
949    }
950
951    if (mHwc && mHwc->dump) {
952        mHwc->dump(mHwc, buffer, SIZE);
953        result.append(buffer);
954    }
955}
956
957// ---------------------------------------------------------------------------
958
959HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
960    : mHwc(hwc), mEnabled(false),
961      mNextFakeVSync(0),
962      mRefreshPeriod(hwc.getRefreshPeriod(HWC_DISPLAY_PRIMARY))
963{
964}
965
966void HWComposer::VSyncThread::setEnabled(bool enabled) {
967    Mutex::Autolock _l(mLock);
968    mEnabled = enabled;
969    mCondition.signal();
970}
971
972void HWComposer::VSyncThread::onFirstRef() {
973    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
974}
975
976bool HWComposer::VSyncThread::threadLoop() {
977    { // scope for lock
978        Mutex::Autolock _l(mLock);
979        while (!mEnabled) {
980            mCondition.wait(mLock);
981        }
982    }
983
984    const nsecs_t period = mRefreshPeriod;
985    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
986    nsecs_t next_vsync = mNextFakeVSync;
987    nsecs_t sleep = next_vsync - now;
988    if (sleep < 0) {
989        // we missed, find where the next vsync should be
990        sleep = (period - ((now - next_vsync) % period));
991        next_vsync = now + sleep;
992    }
993    mNextFakeVSync = next_vsync + period;
994
995    struct timespec spec;
996    spec.tv_sec  = next_vsync / 1000000000;
997    spec.tv_nsec = next_vsync % 1000000000;
998
999    int err;
1000    do {
1001        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
1002    } while (err<0 && errno == EINTR);
1003
1004    if (err == 0) {
1005        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
1006    }
1007
1008    return true;
1009}
1010
1011// ---------------------------------------------------------------------------
1012}; // namespace android
1013