HWComposer.cpp revision 3a77871383bc1a03cc866686d81628493d14de7c 
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
25#include <utils/Errors.h>
26#include <utils/String8.h>
27#include <utils/Thread.h>
28#include <utils/Trace.h>
29#include <utils/Vector.h>
30
31#include <hardware/hardware.h>
32#include <hardware/hwcomposer.h>
33
34#include <cutils/log.h>
35
36#include <EGL/egl.h>
37
38#include "LayerBase.h"
39#include "HWComposer.h"
40#include "SurfaceFlinger.h"
41
42namespace android {
43// ---------------------------------------------------------------------------
44
45HWComposer::HWComposer(
46        const sp<SurfaceFlinger>& flinger,
47        EventHandler& handler,
48        nsecs_t refreshPeriod)
49    : mFlinger(flinger),
50      mModule(0), mHwc(0), mList(0), mCapacity(0),
51      mNumOVLayers(0), mNumFBLayers(0),
52      mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE),
53      mEventHandler(handler),
54      mRefreshPeriod(refreshPeriod), mVSyncCount(0)
55{
56    bool needVSyncThread = false;
57    int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
58    ALOGW_IF(err, "%s module not found", HWC_HARDWARE_MODULE_ID);
59    if (err == 0) {
60        err = hwc_open(mModule, &mHwc);
61        ALOGE_IF(err, "%s device failed to initialize (%s)",
62                HWC_HARDWARE_COMPOSER, strerror(-err));
63        if (err == 0) {
64            if (mHwc->registerProcs) {
65                mCBContext.hwc = this;
66                mCBContext.procs.invalidate = &hook_invalidate;
67                mCBContext.procs.vsync = &hook_vsync;
68                mHwc->registerProcs(mHwc, &mCBContext.procs);
69                memset(mCBContext.procs.zero, 0, sizeof(mCBContext.procs.zero));
70            }
71            if (mHwc->common.version < HWC_DEVICE_API_VERSION_0_3) {
72                needVSyncThread = true;
73            }
74        }
75    } else {
76        needVSyncThread = true;
77    }
78
79    if (needVSyncThread) {
80        // we don't have VSYNC support, we need to fake it
81        mVSyncThread = new VSyncThread(*this);
82    }
83}
84
85HWComposer::~HWComposer() {
86    free(mList);
87    if (mVSyncThread != NULL) {
88        mVSyncThread->requestExitAndWait();
89    }
90    if (mHwc) {
91        hwc_close(mHwc);
92    }
93}
94
95status_t HWComposer::initCheck() const {
96    return mHwc ? NO_ERROR : NO_INIT;
97}
98
99void HWComposer::hook_invalidate(struct hwc_procs* procs) {
100    reinterpret_cast<cb_context *>(procs)->hwc->invalidate();
101}
102
103void HWComposer::hook_vsync(struct hwc_procs* procs, int dpy, int64_t timestamp) {
104    reinterpret_cast<cb_context *>(procs)->hwc->vsync(dpy, timestamp);
105}
106
107void HWComposer::invalidate() {
108    mFlinger->repaintEverything();
109}
110
111void HWComposer::vsync(int dpy, int64_t timestamp) {
112    ATRACE_INT("VSYNC", ++mVSyncCount&1);
113    mEventHandler.onVSyncReceived(dpy, timestamp);
114}
115
116status_t HWComposer::eventControl(int event, int enabled) {
117    status_t err = NO_ERROR;
118    if (mHwc && mHwc->common.version >= HWC_DEVICE_API_VERSION_0_3) {
119        err = mHwc->methods->eventControl(mHwc, event, enabled);
120    }
121
122    if (err == NO_ERROR && mVSyncThread != NULL) {
123        mVSyncThread->setEnabled(enabled);
124    }
125
126    return err;
127}
128
129void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
130    mDpy = (hwc_display_t)dpy;
131    mSur = (hwc_surface_t)sur;
132}
133
134status_t HWComposer::createWorkList(size_t numLayers) {
135    if (mHwc) {
136        if (!mList || mCapacity < numLayers) {
137            free(mList);
138            size_t size = sizeof(hwc_layer_list) + numLayers*sizeof(hwc_layer_t);
139            mList = (hwc_layer_list_t*)malloc(size);
140            mCapacity = numLayers;
141        }
142        mList->flags = HWC_GEOMETRY_CHANGED;
143        mList->numHwLayers = numLayers;
144    }
145    return NO_ERROR;
146}
147
148status_t HWComposer::prepare() const {
149    int err = mHwc->prepare(mHwc, mList);
150    if (err == NO_ERROR) {
151        size_t numOVLayers = 0;
152        size_t numFBLayers = 0;
153        size_t count = mList->numHwLayers;
154        for (size_t i=0 ; i<count ; i++) {
155            hwc_layer& l(mList->hwLayers[i]);
156            if (l.flags & HWC_SKIP_LAYER) {
157                l.compositionType = HWC_FRAMEBUFFER;
158            }
159            switch (l.compositionType) {
160                case HWC_OVERLAY:
161                    numOVLayers++;
162                    break;
163                case HWC_FRAMEBUFFER:
164                    numFBLayers++;
165                    break;
166            }
167        }
168        mNumOVLayers = numOVLayers;
169        mNumFBLayers = numFBLayers;
170    }
171    return (status_t)err;
172}
173
174size_t HWComposer::getLayerCount(int type) const {
175    switch (type) {
176        case HWC_OVERLAY:
177            return mNumOVLayers;
178        case HWC_FRAMEBUFFER:
179            return mNumFBLayers;
180    }
181    return 0;
182}
183
184status_t HWComposer::commit() const {
185    int err = mHwc->set(mHwc, mDpy, mSur, mList);
186    if (mList) {
187        mList->flags &= ~HWC_GEOMETRY_CHANGED;
188    }
189    return (status_t)err;
190}
191
192status_t HWComposer::release() const {
193    if (mHwc) {
194        int err = mHwc->set(mHwc, NULL, NULL, NULL);
195        return (status_t)err;
196    }
197    return NO_ERROR;
198}
199
200status_t HWComposer::disable() {
201    if (mHwc) {
202        free(mList);
203        mList = NULL;
204        int err = mHwc->prepare(mHwc, NULL);
205        return (status_t)err;
206    }
207    return NO_ERROR;
208}
209
210size_t HWComposer::getNumLayers() const {
211    return mList ? mList->numHwLayers : 0;
212}
213
214hwc_layer_t* HWComposer::getLayers() const {
215    return mList ? mList->hwLayers : 0;
216}
217
218void HWComposer::dump(String8& result, char* buffer, size_t SIZE,
219        const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const {
220    if (mHwc && mList) {
221        result.append("Hardware Composer state:\n");
222
223        snprintf(buffer, SIZE, "  numHwLayers=%u, flags=%08x\n",
224                mList->numHwLayers, mList->flags);
225        result.append(buffer);
226        result.append(
227                "   type   |  handle  |   hints  |   flags  | tr | blend |  format  |       source crop         |           frame           name \n"
228                "----------+----------+----------+----------+----+-------+----------+---------------------------+--------------------------------\n");
229        //      " ________ | ________ | ________ | ________ | __ | _____ | ________ | [_____,_____,_____,_____] | [_____,_____,_____,_____]
230        for (size_t i=0 ; i<mList->numHwLayers ; i++) {
231            const hwc_layer_t& l(mList->hwLayers[i]);
232            const sp<LayerBase> layer(visibleLayersSortedByZ[i]);
233            int32_t format = -1;
234            if (layer->getLayer() != NULL) {
235                const sp<GraphicBuffer>& buffer(layer->getLayer()->getActiveBuffer());
236                if (buffer != NULL) {
237                    format = buffer->getPixelFormat();
238                }
239            }
240            snprintf(buffer, SIZE,
241                    " %8s | %08x | %08x | %08x | %02x | %05x | %08x | [%5d,%5d,%5d,%5d] | [%5d,%5d,%5d,%5d] %s\n",
242                    l.compositionType ? "OVERLAY" : "FB",
243                    intptr_t(l.handle), l.hints, l.flags, l.transform, l.blending, format,
244                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
245                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom,
246                    layer->getName().string());
247            result.append(buffer);
248        }
249    }
250    if (mHwc && mHwc->common.version >= 1 && mHwc->dump) {
251        mHwc->dump(mHwc, buffer, SIZE);
252        result.append(buffer);
253    }
254}
255
256// ---------------------------------------------------------------------------
257
258HWComposer::VSyncThread::VSyncThread(HWComposer& hwc)
259    : mHwc(hwc), mEnabled(false),
260      mNextFakeVSync(0),
261      mRefreshPeriod(hwc.mRefreshPeriod)
262{
263}
264
265void HWComposer::VSyncThread::setEnabled(bool enabled) {
266    Mutex::Autolock _l(mLock);
267    mEnabled = enabled;
268    mCondition.signal();
269}
270
271void HWComposer::VSyncThread::onFirstRef() {
272    run("VSyncThread", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE);
273}
274
275bool HWComposer::VSyncThread::threadLoop() {
276    { // scope for lock
277        Mutex::Autolock _l(mLock);
278        while (!mEnabled) {
279            mCondition.wait(mLock);
280        }
281    }
282
283    const nsecs_t period = mRefreshPeriod;
284    const nsecs_t now = systemTime(CLOCK_MONOTONIC);
285    nsecs_t next_vsync = mNextFakeVSync;
286    nsecs_t sleep = next_vsync - now;
287    if (sleep < 0) {
288        // we missed, find where the next vsync should be
289        sleep = (period - ((now - next_vsync) % period));
290        next_vsync = now + sleep;
291    }
292    mNextFakeVSync = next_vsync + period;
293
294    struct timespec spec;
295    spec.tv_sec  = next_vsync / 1000000000;
296    spec.tv_nsec = next_vsync % 1000000000;
297
298    int err;
299    do {
300        err = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &spec, NULL);
301    } while (err<0 && errno == EINTR);
302
303    if (err == 0) {
304        mHwc.mEventHandler.onVSyncReceived(0, next_vsync);
305    }
306
307    return true;
308}
309
310// ---------------------------------------------------------------------------
311}; // namespace android
312