hwc.cpp revision 103c736926cace1ff5a6d154715b375ff1018f8e 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012-2013, The Linux Foundation. All rights reserved.
4 *
5 * Not a Contribution, Apache license notifications and license are retained
6 * for attribution purposes only.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
21#include <fcntl.h>
22#include <errno.h>
23
24#include <cutils/log.h>
25#include <cutils/atomic.h>
26#include <EGL/egl.h>
27#include <utils/Trace.h>
28#include <sys/ioctl.h>
29#include <overlay.h>
30#include <overlayRotator.h>
31#include <overlayWriteback.h>
32#include <mdp_version.h>
33#include "hwc_utils.h"
34#include "hwc_fbupdate.h"
35#include "hwc_mdpcomp.h"
36#include "external.h"
37#include "hwc_copybit.h"
38#include "hwc_ad.h"
39#include "profiler.h"
40
41using namespace qhwc;
42using namespace overlay;
43
44#define VSYNC_DEBUG 0
45#define BLANK_DEBUG 1
46
47static int hwc_device_open(const struct hw_module_t* module,
48                           const char* name,
49                           struct hw_device_t** device);
50
51static struct hw_module_methods_t hwc_module_methods = {
52    open: hwc_device_open
53};
54
55hwc_module_t HAL_MODULE_INFO_SYM = {
56    common: {
57        tag: HARDWARE_MODULE_TAG,
58        version_major: 2,
59        version_minor: 0,
60        id: HWC_HARDWARE_MODULE_ID,
61        name: "Qualcomm Hardware Composer Module",
62        author: "CodeAurora Forum",
63        methods: &hwc_module_methods,
64        dso: 0,
65        reserved: {0},
66    }
67};
68
69/*
70 * Save callback functions registered to HWC
71 */
72static void hwc_registerProcs(struct hwc_composer_device_1* dev,
73                              hwc_procs_t const* procs)
74{
75    ALOGI("%s", __FUNCTION__);
76    hwc_context_t* ctx = (hwc_context_t*)(dev);
77    if(!ctx) {
78        ALOGE("%s: Invalid context", __FUNCTION__);
79        return;
80    }
81    ctx->proc = procs;
82
83    // Now that we have the functions needed, kick off
84    // the uevent & vsync threads
85    init_uevent_thread(ctx);
86    init_vsync_thread(ctx);
87}
88
89//Helper
90static void reset(hwc_context_t *ctx, int numDisplays,
91                  hwc_display_contents_1_t** displays) {
92    for(int i = 0; i < MAX_DISPLAYS; i++) {
93        hwc_display_contents_1_t *list = displays[i];
94        // XXX:SurfaceFlinger no longer guarantees that this
95        // value is reset on every prepare. However, for the layer
96        // cache we need to reset it.
97        // We can probably rethink that later on
98        if (LIKELY(list && list->numHwLayers > 1)) {
99            for(uint32_t j = 0; j < list->numHwLayers; j++) {
100                if(list->hwLayers[j].compositionType != HWC_FRAMEBUFFER_TARGET)
101                    list->hwLayers[j].compositionType = HWC_FRAMEBUFFER;
102            }
103        }
104
105        if(ctx->mFBUpdate[i])
106            ctx->mFBUpdate[i]->reset();
107        if(ctx->mMDPComp[i])
108            ctx->mMDPComp[i]->reset();
109        if(ctx->mCopyBit[i])
110            ctx->mCopyBit[i]->reset();
111        if(ctx->mLayerRotMap[i])
112            ctx->mLayerRotMap[i]->reset();
113    }
114
115    ctx->mAD->reset();
116}
117
118//clear prev layer prop flags and realloc for current frame
119static void reset_layer_prop(hwc_context_t* ctx, int dpy, int numAppLayers) {
120    if(ctx->layerProp[dpy]) {
121       delete[] ctx->layerProp[dpy];
122       ctx->layerProp[dpy] = NULL;
123    }
124    ctx->layerProp[dpy] = new LayerProp[numAppLayers];
125}
126
127static void handleGeomChange(hwc_context_t *ctx, int dpy,
128        hwc_display_contents_1_t *list) {
129    if(list->flags & HWC_GEOMETRY_CHANGED) {
130        ctx->mOverlay->forceSet(dpy);
131    }
132}
133
134static int display_commit(hwc_context_t *ctx, int dpy) {
135    int fbFd = ctx->dpyAttr[dpy].fd;
136    if(fbFd == -1) {
137        ALOGE("%s: Invalid FB fd for display: %d", __FUNCTION__, dpy);
138        return -1;
139    }
140
141    struct mdp_display_commit commit_info;
142    memset(&commit_info, 0, sizeof(struct mdp_display_commit));
143    commit_info.flags = MDP_DISPLAY_COMMIT_OVERLAY;
144    if(ioctl(fbFd, MSMFB_DISPLAY_COMMIT, &commit_info) == -1) {
145       ALOGE("%s: MSMFB_DISPLAY_COMMIT for primary failed", __FUNCTION__);
146       return -errno;
147    }
148    return 0;
149}
150
151static int hwc_prepare_primary(hwc_composer_device_1 *dev,
152        hwc_display_contents_1_t *list) {
153    ATRACE_CALL();
154    hwc_context_t* ctx = (hwc_context_t*)(dev);
155    const int dpy = HWC_DISPLAY_PRIMARY;
156    if (LIKELY(list && list->numHwLayers > 1) &&
157            ctx->dpyAttr[dpy].isActive) {
158        reset_layer_prop(ctx, dpy, list->numHwLayers - 1);
159        handleGeomChange(ctx, dpy, list);
160        setListStats(ctx, list, dpy);
161        if(ctx->mMDPComp[dpy]->prepare(ctx, list) < 0) {
162            const int fbZ = 0;
163            ctx->mFBUpdate[dpy]->prepare(ctx, list, fbZ);
164        }
165        if (ctx->mMDP.version < qdutils::MDP_V4_0) {
166            if(ctx->mCopyBit[dpy])
167                ctx->mCopyBit[dpy]->prepare(ctx, list, dpy);
168        }
169    }
170    return 0;
171}
172
173static int hwc_prepare_external(hwc_composer_device_1 *dev,
174        hwc_display_contents_1_t *list) {
175
176    ATRACE_CALL();
177    hwc_context_t* ctx = (hwc_context_t*)(dev);
178    const int dpy = HWC_DISPLAY_EXTERNAL;
179
180    if (LIKELY(list && list->numHwLayers > 1) &&
181            ctx->dpyAttr[dpy].isActive &&
182            ctx->dpyAttr[dpy].connected) {
183        reset_layer_prop(ctx, dpy, list->numHwLayers - 1);
184        handleGeomChange(ctx, dpy, list);
185        if(!ctx->dpyAttr[dpy].isPause) {
186            ctx->dpyAttr[dpy].isConfiguring = false;
187            setListStats(ctx, list, dpy);
188            if(ctx->mMDPComp[dpy]->prepare(ctx, list) < 0) {
189                const int fbZ = 0;
190                ctx->mFBUpdate[dpy]->prepare(ctx, list, fbZ);
191            }
192
193            /* Temporarily commenting out C2D until we support partial
194               copybit composition for mixed mode MDP
195
196               if((fbZOrder >= 0) && ctx->mCopyBit[dpy])
197               ctx->mCopyBit[dpy]->prepare(ctx, list, dpy);
198             */
199        } else {
200            // External Display is in Pause state.
201            // ToDo:
202            // Mark all application layers as OVERLAY so that
203            // GPU will not compose. This is done for power
204            // optimization
205        }
206    }
207    return 0;
208}
209
210static int hwc_prepare_virtual(hwc_composer_device_1 *dev,
211        hwc_display_contents_1_t *list) {
212    ATRACE_CALL();
213    hwc_context_t* ctx = (hwc_context_t*)(dev);
214    const int dpy = HWC_DISPLAY_VIRTUAL;
215
216    if (list && list->numHwLayers > 1) {
217        reset_layer_prop(ctx, dpy, list->numHwLayers - 1);
218        uint32_t last = list->numHwLayers - 1;
219        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
220        int fbWidth = 0, fbHeight = 0;
221        getLayerResolution(fbLayer, fbWidth, fbHeight);
222        ctx->dpyAttr[dpy].xres = fbWidth;
223        ctx->dpyAttr[dpy].yres = fbHeight;
224
225        if(ctx->dpyAttr[dpy].connected == false) {
226            ctx->dpyAttr[dpy].connected = true;
227            setupSecondaryObjs(ctx, dpy);
228        }
229
230        ctx->dpyAttr[dpy].fd = Writeback::getInstance()->getFbFd();
231        Writeback::getInstance()->configureDpyInfo(fbWidth, fbHeight);
232        setListStats(ctx, list, dpy);
233
234        if(ctx->mMDPComp[dpy]->prepare(ctx, list) < 0) {
235            const int fbZ = 0;
236            ctx->mFBUpdate[dpy]->prepare(ctx, list, fbZ);
237        }
238    }
239    return 0;
240}
241
242static int hwc_prepare(hwc_composer_device_1 *dev, size_t numDisplays,
243                       hwc_display_contents_1_t** displays)
244{
245    int ret = 0;
246    hwc_context_t* ctx = (hwc_context_t*)(dev);
247    //Will be unlocked at the end of set
248    ctx->mDrawLock.lock();
249    reset(ctx, numDisplays, displays);
250
251    ctx->mOverlay->configBegin();
252    ctx->mRotMgr->configBegin();
253    overlay::Writeback::configBegin();
254
255    Overlay::setDMAMode(Overlay::DMA_LINE_MODE);
256
257    //Cleanup virtual display objs, since there is no explicit disconnect
258    if(ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].connected &&
259        (numDisplays <= HWC_NUM_PHYSICAL_DISPLAY_TYPES ||
260        displays[HWC_DISPLAY_VIRTUAL] == NULL)) {
261        ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].connected = false;
262        clearSecondaryObjs(ctx, HWC_DISPLAY_VIRTUAL);
263    }
264
265    for (int32_t i = numDisplays - 1; i >= 0; i--) {
266        hwc_display_contents_1_t *list = displays[i];
267        switch(i) {
268            case HWC_DISPLAY_PRIMARY:
269                ret = hwc_prepare_primary(dev, list);
270                break;
271            case HWC_DISPLAY_EXTERNAL:
272                ret = hwc_prepare_external(dev, list);
273                break;
274            case HWC_DISPLAY_VIRTUAL:
275                ret = hwc_prepare_virtual(dev, list);
276                break;
277            default:
278                ret = -EINVAL;
279        }
280    }
281
282    ctx->mOverlay->configDone();
283    ctx->mRotMgr->configDone();
284    overlay::Writeback::configDone();
285
286    return ret;
287}
288
289static int hwc_eventControl(struct hwc_composer_device_1* dev, int dpy,
290                             int event, int enable)
291{
292    ATRACE_CALL();
293    int ret = 0;
294    hwc_context_t* ctx = (hwc_context_t*)(dev);
295    switch(event) {
296        case HWC_EVENT_VSYNC:
297            if(!ctx->dpyAttr[dpy].isActive) {
298                ALOGE("Display is blanked - Cannot %s vsync",
299                        enable ? "enable" : "disable");
300                return -EINVAL;
301            }
302
303            if (ctx->vstate.enable == enable)
304                break;
305            ret = hwc_vsync_control(ctx, dpy, enable);
306            if(ret == 0)
307                ctx->vstate.enable = !!enable;
308            ALOGD_IF (VSYNC_DEBUG, "VSYNC state changed to %s",
309                      (enable)?"ENABLED":"DISABLED");
310            break;
311        default:
312            ret = -EINVAL;
313    }
314    return ret;
315}
316
317static int hwc_blank(struct hwc_composer_device_1* dev, int dpy, int blank)
318{
319    ATRACE_CALL();
320    hwc_context_t* ctx = (hwc_context_t*)(dev);
321
322    Locker::Autolock _l(ctx->mDrawLock);
323    int ret = 0;
324    ALOGD_IF(BLANK_DEBUG, "%s: %s display: %d", __FUNCTION__,
325          blank==1 ? "Blanking":"Unblanking", dpy);
326    if(blank) {
327        // free up all the overlay pipes in use
328        // when we get a blank for either display
329        // makes sure that all pipes are freed
330        ctx->mOverlay->configBegin();
331        ctx->mOverlay->configDone();
332        ctx->mRotMgr->clear();
333        overlay::Writeback::clear();
334    }
335    switch(dpy) {
336        case HWC_DISPLAY_PRIMARY:
337            if(blank) {
338                ret = ioctl(ctx->dpyAttr[dpy].fd, FBIOBLANK,
339                            FB_BLANK_POWERDOWN);
340            } else {
341                ret = ioctl(ctx->dpyAttr[dpy].fd, FBIOBLANK,FB_BLANK_UNBLANK);
342            }
343            break;
344        case HWC_DISPLAY_EXTERNAL:
345        case HWC_DISPLAY_VIRTUAL:
346            if(blank) {
347                // call external framebuffer commit on blank,
348                // so that any pipe unsets gets committed
349                if (display_commit(ctx, dpy) < 0) {
350                    ret = -1;
351                    ALOGE("%s:post failed for dpy %d",
352                          __FUNCTION__, dpy);
353                }
354            } else {
355            }
356            break;
357        default:
358            return -EINVAL;
359    }
360    if(ret == 0){
361        ctx->dpyAttr[dpy].isActive = !blank;
362    } else {
363        ALOGE("%s: Failed in %s display: %d error:%s", __FUNCTION__,
364              blank==1 ? "blanking":"unblanking", dpy, strerror(errno));
365        return ret;
366    }
367
368    ALOGD_IF(BLANK_DEBUG, "%s: Done %s display: %d", __FUNCTION__,
369          blank==1 ? "blanking":"unblanking", dpy);
370    return 0;
371}
372
373static int hwc_query(struct hwc_composer_device_1* dev,
374                     int param, int* value)
375{
376    hwc_context_t* ctx = (hwc_context_t*)(dev);
377    int supported = HWC_DISPLAY_PRIMARY_BIT;
378
379    switch (param) {
380    case HWC_BACKGROUND_LAYER_SUPPORTED:
381        // Not supported for now
382        value[0] = 0;
383        break;
384    case HWC_DISPLAY_TYPES_SUPPORTED: //Unused by f/w
385        if(ctx->mMDP.hasOverlay) {
386            supported |= HWC_DISPLAY_VIRTUAL_BIT;
387            if(!qdutils::MDPVersion::getInstance().is8x26())
388                supported |= HWC_DISPLAY_EXTERNAL_BIT;
389        }
390        value[0] = supported;
391        break;
392    default:
393        return -EINVAL;
394    }
395    return 0;
396
397}
398
399
400static int hwc_set_primary(hwc_context_t *ctx, hwc_display_contents_1_t* list) {
401    ATRACE_CALL();
402    int ret = 0;
403    const int dpy = HWC_DISPLAY_PRIMARY;
404
405    if (LIKELY(list) && ctx->dpyAttr[dpy].isActive) {
406        uint32_t last = list->numHwLayers - 1;
407        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
408        int fd = -1; //FenceFD from the Copybit(valid in async mode)
409        bool copybitDone = false;
410        if(ctx->mCopyBit[dpy])
411            copybitDone = ctx->mCopyBit[dpy]->draw(ctx, list, dpy, &fd);
412        if(list->numHwLayers > 1)
413            hwc_sync(ctx, list, dpy, fd);
414
415        if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
416            ALOGE("%s: MDPComp draw failed", __FUNCTION__);
417            ret = -1;
418        }
419
420        //TODO We dont check for SKIP flag on this layer because we need PAN
421        //always. Last layer is always FB
422        private_handle_t *hnd = (private_handle_t *)fbLayer->handle;
423        if(copybitDone) {
424            hnd = ctx->mCopyBit[dpy]->getCurrentRenderBuffer();
425        }
426
427        if(hnd) {
428            if (!ctx->mFBUpdate[dpy]->draw(ctx, hnd)) {
429                ALOGE("%s: FBUpdate draw failed", __FUNCTION__);
430                ret = -1;
431            }
432        }
433
434        if (display_commit(ctx, dpy) < 0) {
435            ALOGE("%s: display commit fail!", __FUNCTION__);
436            ret = -1;
437        }
438    }
439
440    closeAcquireFds(list, dpy);
441    return ret;
442}
443
444static int hwc_set_external(hwc_context_t *ctx,
445        hwc_display_contents_1_t* list)
446{
447    ATRACE_CALL();
448    int ret = 0;
449    const int dpy = HWC_DISPLAY_EXTERNAL;
450
451    if (LIKELY(list) && ctx->dpyAttr[dpy].isActive &&
452        !ctx->dpyAttr[dpy].isPause &&
453        ctx->dpyAttr[dpy].connected) {
454        uint32_t last = list->numHwLayers - 1;
455        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
456        int fd = -1; //FenceFD from the Copybit(valid in async mode)
457        bool copybitDone = false;
458        if(ctx->mCopyBit[dpy])
459            copybitDone = ctx->mCopyBit[dpy]->draw(ctx, list, dpy, &fd);
460
461        if(list->numHwLayers > 1)
462            hwc_sync(ctx, list, dpy, fd);
463
464        if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
465            ALOGE("%s: MDPComp draw failed", __FUNCTION__);
466            ret = -1;
467        }
468
469        private_handle_t *hnd = (private_handle_t *)fbLayer->handle;
470        if(copybitDone) {
471            hnd = ctx->mCopyBit[dpy]->getCurrentRenderBuffer();
472        }
473
474        if(hnd) {
475            if (!ctx->mFBUpdate[dpy]->draw(ctx, hnd)) {
476                ALOGE("%s: FBUpdate::draw fail!", __FUNCTION__);
477                ret = -1;
478            }
479        }
480
481        if (display_commit(ctx, dpy) < 0) {
482            ALOGE("%s: display commit fail!", __FUNCTION__);
483            ret = -1;
484        }
485    }
486
487    closeAcquireFds(list, dpy);
488    return ret;
489}
490
491static int hwc_set_virtual(hwc_context_t *ctx,
492        hwc_display_contents_1_t* list) {
493    ATRACE_CALL();
494    int ret = 0;
495    const int dpy = HWC_DISPLAY_VIRTUAL;
496
497    if (list && list->outbuf && list->numHwLayers > 1) {
498        uint32_t last = list->numHwLayers - 1;
499        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
500
501        if(fbLayer->handle && ctx->dpyAttr[dpy].connected
502#ifndef FORCE_HWC_FOR_VIRTUAL_DISPLAYS
503                //XXX: If we're not forcing virtual via HWC,
504                //full GLES compositions will not be routed through here.
505                && !isGLESOnlyComp(ctx, dpy)
506#endif
507        ) {
508
509            private_handle_t *ohnd = (private_handle_t *)list->outbuf;
510            Writeback::getInstance()->setOutputFormat(
511                    utils::getMdpFormat(ohnd->format));
512
513            int fd = -1; //FenceFD from the Copybit
514            hwc_sync(ctx, list, dpy, fd);
515
516            if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
517                ALOGE("%s: MDPComp draw failed", __FUNCTION__);
518                ret = -1;
519            }
520
521            if (!ctx->mFBUpdate[dpy]->draw(ctx,
522                        (private_handle_t *)fbLayer->handle)) {
523                ALOGE("%s: FBUpdate::draw fail!", __FUNCTION__);
524                ret = -1;
525            }
526
527            Writeback::getInstance()->queueBuffer(ohnd->fd, ohnd->offset);
528            if (display_commit(ctx, dpy) < 0) {
529                ALOGE("%s: display commit fail!", __FUNCTION__);
530                ret = -1;
531            }
532        } else if(list->outbufAcquireFenceFd >= 0) {
533            //If we dont handle the frame, set retireFenceFd to outbufFenceFd,
534            //which will make sure, the framework waits on it and closes it.
535            //The other way is to wait on outbufFenceFd ourselves, close it and
536            //set retireFenceFd to -1. Since we want hwc to be async, choosing
537            //the former.
538            //Also dup because, the closeAcquireFds() will close the outbufFence
539            list->retireFenceFd = dup(list->outbufAcquireFenceFd);
540        }
541    }
542
543    closeAcquireFds(list, dpy);
544    return ret;
545}
546
547
548static int hwc_set(hwc_composer_device_1 *dev,
549                   size_t numDisplays,
550                   hwc_display_contents_1_t** displays)
551{
552    int ret = 0;
553    hwc_context_t* ctx = (hwc_context_t*)(dev);
554    for (uint32_t i = 0; i < numDisplays; i++) {
555        hwc_display_contents_1_t* list = displays[i];
556        switch(i) {
557            case HWC_DISPLAY_PRIMARY:
558                ret = hwc_set_primary(ctx, list);
559                break;
560            case HWC_DISPLAY_EXTERNAL:
561                ret = hwc_set_external(ctx, list);
562                break;
563            case HWC_DISPLAY_VIRTUAL:
564                ret = hwc_set_virtual(ctx, list);
565                break;
566            default:
567                ret = -EINVAL;
568        }
569    }
570    // This is only indicative of how many times SurfaceFlinger posts
571    // frames to the display.
572    CALC_FPS();
573    MDPComp::resetIdleFallBack();
574    ctx->mVideoTransFlag = false;
575    //Was locked at the beginning of prepare
576    ctx->mDrawLock.unlock();
577    return ret;
578}
579
580int hwc_getDisplayConfigs(struct hwc_composer_device_1* dev, int disp,
581        uint32_t* configs, size_t* numConfigs) {
582    int ret = 0;
583    hwc_context_t* ctx = (hwc_context_t*)(dev);
584    //in 1.1 there is no way to choose a config, report as config id # 0
585    //This config is passed to getDisplayAttributes. Ignore for now.
586    switch(disp) {
587        case HWC_DISPLAY_PRIMARY:
588            if(*numConfigs > 0) {
589                configs[0] = 0;
590                *numConfigs = 1;
591            }
592            ret = 0; //NO_ERROR
593            break;
594        case HWC_DISPLAY_EXTERNAL:
595            ret = -1; //Not connected
596            if(ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].connected) {
597                ret = 0; //NO_ERROR
598                if(*numConfigs > 0) {
599                    configs[0] = 0;
600                    *numConfigs = 1;
601                }
602            }
603            break;
604    }
605    return ret;
606}
607
608int hwc_getDisplayAttributes(struct hwc_composer_device_1* dev, int disp,
609        uint32_t config, const uint32_t* attributes, int32_t* values) {
610
611    hwc_context_t* ctx = (hwc_context_t*)(dev);
612    //If hotpluggable displays are inactive return error
613    if(disp == HWC_DISPLAY_EXTERNAL && !ctx->dpyAttr[disp].connected) {
614        return -1;
615    }
616
617    //From HWComposer
618    static const uint32_t DISPLAY_ATTRIBUTES[] = {
619        HWC_DISPLAY_VSYNC_PERIOD,
620        HWC_DISPLAY_WIDTH,
621        HWC_DISPLAY_HEIGHT,
622        HWC_DISPLAY_DPI_X,
623        HWC_DISPLAY_DPI_Y,
624        HWC_DISPLAY_NO_ATTRIBUTE,
625    };
626
627    const int NUM_DISPLAY_ATTRIBUTES = (sizeof(DISPLAY_ATTRIBUTES) /
628            sizeof(DISPLAY_ATTRIBUTES)[0]);
629
630    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
631        switch (attributes[i]) {
632        case HWC_DISPLAY_VSYNC_PERIOD:
633            values[i] = ctx->dpyAttr[disp].vsync_period;
634            break;
635        case HWC_DISPLAY_WIDTH:
636            values[i] = ctx->dpyAttr[disp].xres;
637            ALOGD("%s disp = %d, width = %d",__FUNCTION__, disp,
638                    ctx->dpyAttr[disp].xres);
639            break;
640        case HWC_DISPLAY_HEIGHT:
641            values[i] = ctx->dpyAttr[disp].yres;
642            ALOGD("%s disp = %d, height = %d",__FUNCTION__, disp,
643                    ctx->dpyAttr[disp].yres);
644            break;
645        case HWC_DISPLAY_DPI_X:
646            values[i] = (int32_t) (ctx->dpyAttr[disp].xdpi*1000.0);
647            break;
648        case HWC_DISPLAY_DPI_Y:
649            values[i] = (int32_t) (ctx->dpyAttr[disp].ydpi*1000.0);
650            break;
651        default:
652            ALOGE("Unknown display attribute %d",
653                    attributes[i]);
654            return -EINVAL;
655        }
656    }
657    return 0;
658}
659
660void hwc_dump(struct hwc_composer_device_1* dev, char *buff, int buff_len)
661{
662    hwc_context_t* ctx = (hwc_context_t*)(dev);
663    Locker::Autolock _l(ctx->mDrawLock);
664    android::String8 aBuf("");
665    dumpsys_log(aBuf, "Qualcomm HWC state:\n");
666    dumpsys_log(aBuf, "  MDPVersion=%d\n", ctx->mMDP.version);
667    dumpsys_log(aBuf, "  DisplayPanel=%c\n", ctx->mMDP.panel);
668    for(int dpy = 0; dpy < MAX_DISPLAYS; dpy++) {
669        if(ctx->mMDPComp[dpy])
670            ctx->mMDPComp[dpy]->dump(aBuf);
671    }
672    char ovDump[2048] = {'\0'};
673    ctx->mOverlay->getDump(ovDump, 2048);
674    dumpsys_log(aBuf, ovDump);
675    ovDump[0] = '\0';
676    ctx->mRotMgr->getDump(ovDump, 1024);
677    dumpsys_log(aBuf, ovDump);
678    ovDump[0] = '\0';
679    Writeback::getInstance()->getDump(ovDump, 1024);
680    dumpsys_log(aBuf, ovDump);
681    strlcpy(buff, aBuf.string(), buff_len);
682}
683
684static int hwc_device_close(struct hw_device_t *dev)
685{
686    if(!dev) {
687        ALOGE("%s: NULL device pointer", __FUNCTION__);
688        return -1;
689    }
690    closeContext((hwc_context_t*)dev);
691    free(dev);
692
693    return 0;
694}
695
696static int hwc_device_open(const struct hw_module_t* module, const char* name,
697                           struct hw_device_t** device)
698{
699    int status = -EINVAL;
700
701    if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
702        struct hwc_context_t *dev;
703        dev = (hwc_context_t*)malloc(sizeof(*dev));
704        memset(dev, 0, sizeof(*dev));
705
706        //Initialize hwc context
707        initContext(dev);
708
709        //Setup HWC methods
710        dev->device.common.tag          = HARDWARE_DEVICE_TAG;
711        dev->device.common.version      = HWC_DEVICE_API_VERSION_1_3;
712        dev->device.common.module       = const_cast<hw_module_t*>(module);
713        dev->device.common.close        = hwc_device_close;
714        dev->device.prepare             = hwc_prepare;
715        dev->device.set                 = hwc_set;
716        dev->device.eventControl        = hwc_eventControl;
717        dev->device.blank               = hwc_blank;
718        dev->device.query               = hwc_query;
719        dev->device.registerProcs       = hwc_registerProcs;
720        dev->device.dump                = hwc_dump;
721        dev->device.getDisplayConfigs   = hwc_getDisplayConfigs;
722        dev->device.getDisplayAttributes = hwc_getDisplayAttributes;
723        *device = &dev->device.common;
724        status = 0;
725    }
726    return status;
727}
728