hwc.cpp revision 8f1c93c4d5c2feb515cde2a6ecc2309188002cbe 
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->outbuf && 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        private_handle_t *ohnd = (private_handle_t *)list->outbuf;
232        Writeback::getInstance()->configureDpyInfo(ohnd->width, ohnd->height);
233        setListStats(ctx, list, dpy);
234
235        if(ctx->mMDPComp[dpy]->prepare(ctx, list) < 0) {
236            const int fbZ = 0;
237            ctx->mFBUpdate[dpy]->prepare(ctx, list, fbZ);
238        }
239    }
240    return 0;
241}
242
243static int hwc_prepare(hwc_composer_device_1 *dev, size_t numDisplays,
244                       hwc_display_contents_1_t** displays)
245{
246    int ret = 0;
247    hwc_context_t* ctx = (hwc_context_t*)(dev);
248    //Will be unlocked at the end of set
249    ctx->mDrawLock.lock();
250    reset(ctx, numDisplays, displays);
251
252    ctx->mOverlay->configBegin();
253    ctx->mRotMgr->configBegin();
254    overlay::Writeback::configBegin();
255
256    Overlay::setDMAMode(Overlay::DMA_LINE_MODE);
257
258    //Cleanup virtual display objs, since there is no explicit disconnect
259    if(ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].connected &&
260        (numDisplays <= HWC_NUM_PHYSICAL_DISPLAY_TYPES ||
261        displays[HWC_DISPLAY_VIRTUAL] == NULL)) {
262        ctx->dpyAttr[HWC_DISPLAY_VIRTUAL].connected = false;
263        clearSecondaryObjs(ctx, HWC_DISPLAY_VIRTUAL);
264    }
265
266    for (int32_t i = numDisplays - 1; i >= 0; i--) {
267        hwc_display_contents_1_t *list = displays[i];
268        switch(i) {
269            case HWC_DISPLAY_PRIMARY:
270                ret = hwc_prepare_primary(dev, list);
271                break;
272            case HWC_DISPLAY_EXTERNAL:
273                ret = hwc_prepare_external(dev, list);
274                break;
275            case HWC_DISPLAY_VIRTUAL:
276                ret = hwc_prepare_virtual(dev, list);
277                break;
278            default:
279                ret = -EINVAL;
280        }
281    }
282
283    ctx->mOverlay->configDone();
284    ctx->mRotMgr->configDone();
285    overlay::Writeback::configDone();
286
287    return ret;
288}
289
290static int hwc_eventControl(struct hwc_composer_device_1* dev, int dpy,
291                             int event, int enable)
292{
293    ATRACE_CALL();
294    int ret = 0;
295    hwc_context_t* ctx = (hwc_context_t*)(dev);
296    switch(event) {
297        case HWC_EVENT_VSYNC:
298            if(!ctx->dpyAttr[dpy].isActive) {
299                ALOGE("Display is blanked - Cannot %s vsync",
300                        enable ? "enable" : "disable");
301                return -EINVAL;
302            }
303
304            if (ctx->vstate.enable == enable)
305                break;
306            ret = hwc_vsync_control(ctx, dpy, enable);
307            if(ret == 0)
308                ctx->vstate.enable = !!enable;
309            ALOGD_IF (VSYNC_DEBUG, "VSYNC state changed to %s",
310                      (enable)?"ENABLED":"DISABLED");
311            break;
312        default:
313            ret = -EINVAL;
314    }
315    return ret;
316}
317
318static int hwc_blank(struct hwc_composer_device_1* dev, int dpy, int blank)
319{
320    ATRACE_CALL();
321    hwc_context_t* ctx = (hwc_context_t*)(dev);
322
323    Locker::Autolock _l(ctx->mDrawLock);
324    int ret = 0;
325    ALOGD_IF(BLANK_DEBUG, "%s: %s display: %d", __FUNCTION__,
326          blank==1 ? "Blanking":"Unblanking", dpy);
327    if(blank) {
328        // free up all the overlay pipes in use
329        // when we get a blank for either display
330        // makes sure that all pipes are freed
331        ctx->mOverlay->configBegin();
332        ctx->mOverlay->configDone();
333        ctx->mRotMgr->clear();
334        overlay::Writeback::clear();
335    }
336    switch(dpy) {
337        case HWC_DISPLAY_PRIMARY:
338            if(blank) {
339                ret = ioctl(ctx->dpyAttr[dpy].fd, FBIOBLANK,
340                            FB_BLANK_POWERDOWN);
341            } else {
342                ret = ioctl(ctx->dpyAttr[dpy].fd, FBIOBLANK,FB_BLANK_UNBLANK);
343            }
344            break;
345        case HWC_DISPLAY_EXTERNAL:
346        case HWC_DISPLAY_VIRTUAL:
347            if(blank) {
348                // call external framebuffer commit on blank,
349                // so that any pipe unsets gets committed
350                if (display_commit(ctx, dpy) < 0) {
351                    ret = -1;
352                    ALOGE("%s:post failed for dpy %d",
353                          __FUNCTION__, dpy);
354                }
355            } else {
356            }
357            break;
358        default:
359            return -EINVAL;
360    }
361    if(ret == 0){
362        ctx->dpyAttr[dpy].isActive = !blank;
363    } else {
364        ALOGE("%s: Failed in %s display: %d error:%s", __FUNCTION__,
365              blank==1 ? "blanking":"unblanking", dpy, strerror(errno));
366        return ret;
367    }
368
369    ALOGD_IF(BLANK_DEBUG, "%s: Done %s display: %d", __FUNCTION__,
370          blank==1 ? "blanking":"unblanking", dpy);
371    return 0;
372}
373
374static int hwc_query(struct hwc_composer_device_1* dev,
375                     int param, int* value)
376{
377    hwc_context_t* ctx = (hwc_context_t*)(dev);
378    int supported = HWC_DISPLAY_PRIMARY_BIT;
379
380    switch (param) {
381    case HWC_BACKGROUND_LAYER_SUPPORTED:
382        // Not supported for now
383        value[0] = 0;
384        break;
385    case HWC_DISPLAY_TYPES_SUPPORTED: //Unused by f/w
386        if(ctx->mMDP.hasOverlay) {
387            supported |= HWC_DISPLAY_VIRTUAL_BIT;
388            if(!qdutils::MDPVersion::getInstance().is8x26())
389                supported |= HWC_DISPLAY_EXTERNAL_BIT;
390        }
391        value[0] = supported;
392        break;
393    default:
394        return -EINVAL;
395    }
396    return 0;
397
398}
399
400
401static int hwc_set_primary(hwc_context_t *ctx, hwc_display_contents_1_t* list) {
402    ATRACE_CALL();
403    int ret = 0;
404    const int dpy = HWC_DISPLAY_PRIMARY;
405
406    if (LIKELY(list) && ctx->dpyAttr[dpy].isActive) {
407        uint32_t last = list->numHwLayers - 1;
408        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
409        int fd = -1; //FenceFD from the Copybit(valid in async mode)
410        bool copybitDone = false;
411        if(ctx->mCopyBit[dpy])
412            copybitDone = ctx->mCopyBit[dpy]->draw(ctx, list, dpy, &fd);
413        if(list->numHwLayers > 1)
414            hwc_sync(ctx, list, dpy, fd);
415
416        if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
417            ALOGE("%s: MDPComp draw failed", __FUNCTION__);
418            ret = -1;
419        }
420
421        //TODO We dont check for SKIP flag on this layer because we need PAN
422        //always. Last layer is always FB
423        private_handle_t *hnd = (private_handle_t *)fbLayer->handle;
424        if(copybitDone) {
425            hnd = ctx->mCopyBit[dpy]->getCurrentRenderBuffer();
426        }
427
428        if(hnd) {
429            if (!ctx->mFBUpdate[dpy]->draw(ctx, hnd)) {
430                ALOGE("%s: FBUpdate draw failed", __FUNCTION__);
431                ret = -1;
432            }
433        }
434
435        if (display_commit(ctx, dpy) < 0) {
436            ALOGE("%s: display commit fail!", __FUNCTION__);
437            ret = -1;
438        }
439    }
440
441    closeAcquireFds(list, dpy);
442    return ret;
443}
444
445static int hwc_set_external(hwc_context_t *ctx,
446        hwc_display_contents_1_t* list)
447{
448    ATRACE_CALL();
449    int ret = 0;
450    const int dpy = HWC_DISPLAY_EXTERNAL;
451
452    if (LIKELY(list) && ctx->dpyAttr[dpy].isActive &&
453        !ctx->dpyAttr[dpy].isPause &&
454        ctx->dpyAttr[dpy].connected) {
455        uint32_t last = list->numHwLayers - 1;
456        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
457        int fd = -1; //FenceFD from the Copybit(valid in async mode)
458        bool copybitDone = false;
459        if(ctx->mCopyBit[dpy])
460            copybitDone = ctx->mCopyBit[dpy]->draw(ctx, list, dpy, &fd);
461
462        if(list->numHwLayers > 1)
463            hwc_sync(ctx, list, dpy, fd);
464
465        if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
466            ALOGE("%s: MDPComp draw failed", __FUNCTION__);
467            ret = -1;
468        }
469
470        private_handle_t *hnd = (private_handle_t *)fbLayer->handle;
471        if(copybitDone) {
472            hnd = ctx->mCopyBit[dpy]->getCurrentRenderBuffer();
473        }
474
475        if(hnd) {
476            if (!ctx->mFBUpdate[dpy]->draw(ctx, hnd)) {
477                ALOGE("%s: FBUpdate::draw fail!", __FUNCTION__);
478                ret = -1;
479            }
480        }
481
482        if (display_commit(ctx, dpy) < 0) {
483            ALOGE("%s: display commit fail!", __FUNCTION__);
484            ret = -1;
485        }
486    }
487
488    closeAcquireFds(list, dpy);
489    return ret;
490}
491
492static int hwc_set_virtual(hwc_context_t *ctx,
493        hwc_display_contents_1_t* list) {
494    ATRACE_CALL();
495    int ret = 0;
496    const int dpy = HWC_DISPLAY_VIRTUAL;
497
498    if (list && list->outbuf && list->numHwLayers > 1) {
499        uint32_t last = list->numHwLayers - 1;
500        hwc_layer_1_t *fbLayer = &list->hwLayers[last];
501
502        if(fbLayer->handle && ctx->dpyAttr[dpy].connected
503#ifndef FORCE_HWC_FOR_VIRTUAL_DISPLAYS
504                //XXX: If we're not forcing virtual via HWC,
505                //full GLES compositions will not be routed through here.
506                && !isGLESOnlyComp(ctx, dpy)
507#endif
508        ) {
509
510            private_handle_t *ohnd = (private_handle_t *)list->outbuf;
511            Writeback::getInstance()->setOutputFormat(
512                    utils::getMdpFormat(ohnd->format));
513
514            int fd = -1; //FenceFD from the Copybit
515            hwc_sync(ctx, list, dpy, fd);
516
517            if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
518                ALOGE("%s: MDPComp draw failed", __FUNCTION__);
519                ret = -1;
520            }
521
522            if (!ctx->mFBUpdate[dpy]->draw(ctx,
523                        (private_handle_t *)fbLayer->handle)) {
524                ALOGE("%s: FBUpdate::draw fail!", __FUNCTION__);
525                ret = -1;
526            }
527
528            Writeback::getInstance()->queueBuffer(ohnd->fd, ohnd->offset);
529            if (display_commit(ctx, dpy) < 0) {
530                ALOGE("%s: display commit fail!", __FUNCTION__);
531                ret = -1;
532            }
533        } else if(list->outbufAcquireFenceFd >= 0) {
534            //If we dont handle the frame, set retireFenceFd to outbufFenceFd,
535            //which will make sure, the framework waits on it and closes it.
536            //The other way is to wait on outbufFenceFd ourselves, close it and
537            //set retireFenceFd to -1. Since we want hwc to be async, choosing
538            //the former.
539            //Also dup because, the closeAcquireFds() will close the outbufFence
540            list->retireFenceFd = dup(list->outbufAcquireFenceFd);
541        }
542    }
543
544    closeAcquireFds(list, dpy);
545    return ret;
546}
547
548
549static int hwc_set(hwc_composer_device_1 *dev,
550                   size_t numDisplays,
551                   hwc_display_contents_1_t** displays)
552{
553    int ret = 0;
554    hwc_context_t* ctx = (hwc_context_t*)(dev);
555    for (uint32_t i = 0; i < numDisplays; i++) {
556        hwc_display_contents_1_t* list = displays[i];
557        switch(i) {
558            case HWC_DISPLAY_PRIMARY:
559                ret = hwc_set_primary(ctx, list);
560                break;
561            case HWC_DISPLAY_EXTERNAL:
562                ret = hwc_set_external(ctx, list);
563                break;
564            case HWC_DISPLAY_VIRTUAL:
565                ret = hwc_set_virtual(ctx, list);
566                break;
567            default:
568                ret = -EINVAL;
569        }
570    }
571    // This is only indicative of how many times SurfaceFlinger posts
572    // frames to the display.
573    CALC_FPS();
574    MDPComp::resetIdleFallBack();
575    ctx->mVideoTransFlag = false;
576    //Was locked at the beginning of prepare
577    ctx->mDrawLock.unlock();
578    return ret;
579}
580
581int hwc_getDisplayConfigs(struct hwc_composer_device_1* dev, int disp,
582        uint32_t* configs, size_t* numConfigs) {
583    int ret = 0;
584    hwc_context_t* ctx = (hwc_context_t*)(dev);
585    //in 1.1 there is no way to choose a config, report as config id # 0
586    //This config is passed to getDisplayAttributes. Ignore for now.
587    switch(disp) {
588        case HWC_DISPLAY_PRIMARY:
589            if(*numConfigs > 0) {
590                configs[0] = 0;
591                *numConfigs = 1;
592            }
593            ret = 0; //NO_ERROR
594            break;
595        case HWC_DISPLAY_EXTERNAL:
596            ret = -1; //Not connected
597            if(ctx->dpyAttr[HWC_DISPLAY_EXTERNAL].connected) {
598                ret = 0; //NO_ERROR
599                if(*numConfigs > 0) {
600                    configs[0] = 0;
601                    *numConfigs = 1;
602                }
603            }
604            break;
605    }
606    return ret;
607}
608
609int hwc_getDisplayAttributes(struct hwc_composer_device_1* dev, int disp,
610        uint32_t config, const uint32_t* attributes, int32_t* values) {
611
612    hwc_context_t* ctx = (hwc_context_t*)(dev);
613    //If hotpluggable displays are inactive return error
614    if(disp == HWC_DISPLAY_EXTERNAL && !ctx->dpyAttr[disp].connected) {
615        return -1;
616    }
617
618    //From HWComposer
619    static const uint32_t DISPLAY_ATTRIBUTES[] = {
620        HWC_DISPLAY_VSYNC_PERIOD,
621        HWC_DISPLAY_WIDTH,
622        HWC_DISPLAY_HEIGHT,
623        HWC_DISPLAY_DPI_X,
624        HWC_DISPLAY_DPI_Y,
625        HWC_DISPLAY_NO_ATTRIBUTE,
626    };
627
628    const int NUM_DISPLAY_ATTRIBUTES = (sizeof(DISPLAY_ATTRIBUTES) /
629            sizeof(DISPLAY_ATTRIBUTES)[0]);
630
631    for (size_t i = 0; i < NUM_DISPLAY_ATTRIBUTES - 1; i++) {
632        switch (attributes[i]) {
633        case HWC_DISPLAY_VSYNC_PERIOD:
634            values[i] = ctx->dpyAttr[disp].vsync_period;
635            break;
636        case HWC_DISPLAY_WIDTH:
637            values[i] = ctx->dpyAttr[disp].xres;
638            ALOGD("%s disp = %d, width = %d",__FUNCTION__, disp,
639                    ctx->dpyAttr[disp].xres);
640            break;
641        case HWC_DISPLAY_HEIGHT:
642            values[i] = ctx->dpyAttr[disp].yres;
643            ALOGD("%s disp = %d, height = %d",__FUNCTION__, disp,
644                    ctx->dpyAttr[disp].yres);
645            break;
646        case HWC_DISPLAY_DPI_X:
647            values[i] = (int32_t) (ctx->dpyAttr[disp].xdpi*1000.0);
648            break;
649        case HWC_DISPLAY_DPI_Y:
650            values[i] = (int32_t) (ctx->dpyAttr[disp].ydpi*1000.0);
651            break;
652        default:
653            ALOGE("Unknown display attribute %d",
654                    attributes[i]);
655            return -EINVAL;
656        }
657    }
658    return 0;
659}
660
661void hwc_dump(struct hwc_composer_device_1* dev, char *buff, int buff_len)
662{
663    hwc_context_t* ctx = (hwc_context_t*)(dev);
664    Locker::Autolock _l(ctx->mDrawLock);
665    android::String8 aBuf("");
666    dumpsys_log(aBuf, "Qualcomm HWC state:\n");
667    dumpsys_log(aBuf, "  MDPVersion=%d\n", ctx->mMDP.version);
668    dumpsys_log(aBuf, "  DisplayPanel=%c\n", ctx->mMDP.panel);
669    for(int dpy = 0; dpy < MAX_DISPLAYS; dpy++) {
670        if(ctx->mMDPComp[dpy])
671            ctx->mMDPComp[dpy]->dump(aBuf);
672    }
673    char ovDump[2048] = {'\0'};
674    ctx->mOverlay->getDump(ovDump, 2048);
675    dumpsys_log(aBuf, ovDump);
676    ovDump[0] = '\0';
677    ctx->mRotMgr->getDump(ovDump, 1024);
678    dumpsys_log(aBuf, ovDump);
679    ovDump[0] = '\0';
680    Writeback::getInstance()->getDump(ovDump, 1024);
681    dumpsys_log(aBuf, ovDump);
682    strlcpy(buff, aBuf.string(), buff_len);
683}
684
685static int hwc_device_close(struct hw_device_t *dev)
686{
687    if(!dev) {
688        ALOGE("%s: NULL device pointer", __FUNCTION__);
689        return -1;
690    }
691    closeContext((hwc_context_t*)dev);
692    free(dev);
693
694    return 0;
695}
696
697static int hwc_device_open(const struct hw_module_t* module, const char* name,
698                           struct hw_device_t** device)
699{
700    int status = -EINVAL;
701
702    if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
703        struct hwc_context_t *dev;
704        dev = (hwc_context_t*)malloc(sizeof(*dev));
705        memset(dev, 0, sizeof(*dev));
706
707        //Initialize hwc context
708        initContext(dev);
709
710        //Setup HWC methods
711        dev->device.common.tag          = HARDWARE_DEVICE_TAG;
712        dev->device.common.version      = HWC_DEVICE_API_VERSION_1_3;
713        dev->device.common.module       = const_cast<hw_module_t*>(module);
714        dev->device.common.close        = hwc_device_close;
715        dev->device.prepare             = hwc_prepare;
716        dev->device.set                 = hwc_set;
717        dev->device.eventControl        = hwc_eventControl;
718        dev->device.blank               = hwc_blank;
719        dev->device.query               = hwc_query;
720        dev->device.registerProcs       = hwc_registerProcs;
721        dev->device.dump                = hwc_dump;
722        dev->device.getDisplayConfigs   = hwc_getDisplayConfigs;
723        dev->device.getDisplayAttributes = hwc_getDisplayAttributes;
724        *device = &dev->device.common;
725        status = 0;
726    }
727    return status;
728}
729