virtual.cpp revision 361900d9a618d2c4d2276a10ca76919214f6759f 
1/*
2* Copyright (c) 2013 The Linux Foundation. All rights reserved.
3*
4* Redistribution and use in source and binary forms, with or without
5* modification, are permitted provided that the following conditions are
6* met:
7*    * Redistributions of source code must retain the above copyright
8*      notice, this list of conditions and the following disclaimer.
9*    * Redistributions in binary form must reproduce the above
10*      copyright notice, this list of conditions and the following
11*      disclaimer in the documentation and/or other materials provided
12*      with the distribution.
13*    * Neither the name of The Linux Foundation. nor the names of its
14*      contributors may be used to endorse or promote products derived
15*      from this software without specific prior written permission.
16*
17* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*/
29
30
31#define DEBUG 0
32#include <ctype.h>
33#include <fcntl.h>
34#include <media/IAudioPolicyService.h>
35#include <media/AudioSystem.h>
36#include <utils/threads.h>
37#include <utils/Errors.h>
38#include <utils/Log.h>
39
40#include <linux/msm_mdp.h>
41#include <linux/fb.h>
42#include <sys/ioctl.h>
43#include <sys/poll.h>
44#include <sys/resource.h>
45#include <cutils/properties.h>
46#include "hwc_utils.h"
47#include "virtual.h"
48#include "overlayUtils.h"
49#include "overlay.h"
50
51using namespace android;
52
53namespace qhwc {
54
55#define MAX_SYSFS_FILE_PATH             255
56
57int VirtualDisplay::configure() {
58    if(!openFrameBuffer())
59        return -1;
60
61    if(ioctl(mFd, FBIOGET_VSCREENINFO, &mVInfo) < 0) {
62        ALOGD("%s: FBIOGET_VSCREENINFO failed with %s", __FUNCTION__,
63                strerror(errno));
64        return -1;
65    }
66    setAttributes();
67    return 0;
68}
69
70int VirtualDisplay::teardown() {
71    closeFrameBuffer();
72    memset(&mVInfo, 0, sizeof(mVInfo));
73    return 0;
74}
75
76VirtualDisplay::VirtualDisplay(hwc_context_t* ctx):mFd(-1),
77     mHwcContext(ctx)
78{
79    memset(&mVInfo, 0, sizeof(mVInfo));
80}
81
82VirtualDisplay::~VirtualDisplay()
83{
84    closeFrameBuffer();
85}
86
87void VirtualDisplay::setAttributes() {
88    mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres = mVInfo.xres;
89    mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres = mVInfo.yres;
90    mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].vsync_period =
91        1000000000l /60;
92    ALOGD_IF(DEBUG,"%s: Setting Virtual Attr: res(%d x %d)",__FUNCTION__,
93             mVInfo.xres, mVInfo.yres);
94}
95
96bool VirtualDisplay::openFrameBuffer()
97{
98    if (mFd == -1) {
99        int fbNum = overlay::Overlay::getInstance()->
100                                   getFbForDpy(HWC_DISPLAY_VIRTUAL);
101
102        char strDevPath[MAX_SYSFS_FILE_PATH];
103        sprintf(strDevPath,"/dev/graphics/fb%d", fbNum);
104
105        mFd = open(strDevPath, O_RDWR);
106        if(mFd < 0) {
107            ALOGE("%s: Unable to open %s ", __FUNCTION__,strDevPath);
108            return -1;
109        }
110
111        mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
112    }
113    return 1;
114}
115
116bool VirtualDisplay::closeFrameBuffer()
117{
118    if(mFd >= 0) {
119        if(close(mFd) < 0 ) {
120            ALOGE("%s: Unable to close FD(%d)", __FUNCTION__, mFd);
121            return -1;
122        }
123        mFd = -1;
124        mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
125    }
126    return 1;
127}
128};
129