mdp_version.cpp revision 0f859f6f0db0e0c05d8c319d8d597ad2731513ae 
1/*
2 * Copyright (c) 2012, Code Aurora Forum. 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 Code Aurora Forum, Inc. 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#include <cutils/log.h>
30#include <fcntl.h>
31#include <linux/fb.h>
32#include "mdp_version.h"
33
34ANDROID_SINGLETON_STATIC_INSTANCE(qdutils::MDPVersion);
35namespace qdutils {
36
37static int getMDPVersionFromFB()
38{
39    int fb_fd = open("/dev/graphics/fb0", O_RDWR);
40    int mdp_version = MDP_V_UNKNOWN;
41    struct fb_fix_screeninfo fb_finfo;
42    if (ioctl(fb_fd, FBIOGET_FSCREENINFO, &fb_finfo) < 0) {
43        ALOGE("FBIOGET_FSCREENINFO failed");
44        mdp_version =  MDP_V_UNKNOWN;
45    } else {
46        if(!strncmp(fb_finfo.id, "msmfb", 5)) {
47            char str_ver[4] = { 0 };
48            memcpy(str_ver, &fb_finfo.id[5], 3);
49            str_ver[3] = '\0';
50            mdp_version = atoi(str_ver);
51
52            //Normalize MDP version to ease comparison.
53            //This is needed only because
54            //MDP 3.0.3 reports value as 303 which
55            //is more than all the others
56            if (mdp_version < 100)
57                mdp_version *= 10;
58
59        } else if (!strncmp(fb_finfo.id, "mdssfb", 6)) {
60            mdp_version = MDSS_V5;
61        } else {
62            mdp_version = MDP_V_UNKNOWN;
63        }
64    }
65    close(fb_fd);
66    return mdp_version;
67}
68
69MDPVersion::MDPVersion()
70{
71    mMDPVersion = getMDPVersionFromFB();
72    if((mMDPVersion >= MDP_V4_0) || (mMDPVersion == MDP_V_UNKNOWN))
73        mHasOverlay = true;
74    else
75        mHasOverlay = false;
76}
77}; //namespace qdutils
78
79