mdp_version.cpp revision c1607973c2d29f7f5bf00ce1be4914e13215f933 
1/*
2 * Copyright (c) 2012-2013, 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#include <cutils/log.h>
30#include <fcntl.h>
31#include <sys/ioctl.h>
32#include <linux/fb.h>
33#include <linux/msm_mdp.h>
34#include "mdp_version.h"
35
36ANDROID_SINGLETON_STATIC_INSTANCE(qdutils::MDPVersion);
37namespace qdutils {
38
39MDPVersion::MDPVersion()
40{
41    int fb_fd = open("/dev/graphics/fb0", O_RDWR);
42    int mdp_version = MDP_V_UNKNOWN;
43    char panel_type = 0;
44    struct fb_fix_screeninfo fb_finfo;
45
46    mMdpRev = 0;
47    mRGBPipes = 0;
48    mVGPipes = 0;
49    mDMAPipes = 0;
50    mFeatures = 0;
51    //TODO get this from driver, default for A-fam to 8
52    mMDPDownscale = 8;
53
54    if (ioctl(fb_fd, FBIOGET_FSCREENINFO, &fb_finfo) < 0) {
55        ALOGE("FBIOGET_FSCREENINFO failed");
56        mdp_version =  MDP_V_UNKNOWN;
57    } else {
58        if(!strncmp(fb_finfo.id, "msmfb", 5)) {
59            char str_ver[4] = { 0 };
60            memcpy(str_ver, &fb_finfo.id[5], 3);
61            str_ver[3] = '\0';
62            mdp_version = atoi(str_ver);
63
64            //Normalize MDP version to ease comparison.
65            //This is needed only because
66            //MDP 3.0.3 reports value as 303 which
67            //is more than all the others
68            if (mdp_version < 100)
69                mdp_version *= 10;
70
71            mRGBPipes = mVGPipes = 2;
72
73        } else if (!strncmp(fb_finfo.id, "mdssfb", 6)) {
74            mdp_version = MDSS_V5;
75#ifdef MDSS_TARGET
76            struct msmfb_metadata metadata;
77            memset(&metadata, 0 , sizeof(metadata));
78            metadata.op = metadata_op_get_caps;
79            if (ioctl(fb_fd, MSMFB_METADATA_GET, &metadata) == -1) {
80                ALOGE("Error retrieving MDP revision and pipes info");
81                mdp_version = MDP_V_UNKNOWN;
82            } else {
83                mMdpRev = metadata.data.caps.mdp_rev;
84                mRGBPipes = metadata.data.caps.rgb_pipes;
85                mVGPipes = metadata.data.caps.vig_pipes;
86                mDMAPipes = metadata.data.caps.dma_pipes;
87                mFeatures = metadata.data.caps.features;
88                if (metadata.data.caps.mdp_rev == MDP_V3_0_4){
89                    mdp_version = MDP_V3_0_4;
90                }
91            }
92#endif
93        } else {
94            mdp_version = MDP_V_UNKNOWN;
95        }
96
97        /* Assumes panel type is 2nd element in '_' delimited id string */
98        char * ptype = strstr(fb_finfo.id, "_");
99        if (!ptype || (*(++ptype) == '\0')) {
100            ALOGE("Invalid framebuffer info string: %s", fb_finfo.id);
101            ptype = fb_finfo.id;
102        }
103        panel_type = *ptype;
104
105    }
106    close(fb_fd);
107    mMDPVersion = mdp_version;
108    mHasOverlay = false;
109    if((mMDPVersion >= MDP_V4_0) ||
110       (mMDPVersion == MDP_V_UNKNOWN) ||
111       (mMDPVersion == MDP_V3_0_4))
112        mHasOverlay = true;
113    if(mMDPVersion >= MDSS_V5) {
114        //TODO get this from driver
115        mMDPDownscale = 4;
116    }
117
118    mPanelType = panel_type;
119}
120
121bool MDPVersion::supportsDecimation() {
122    return mFeatures & MDP_DECIMATION_EN;
123}
124
125uint32_t MDPVersion::getMaxMDPDownscale() {
126    return mMDPDownscale;
127}
128
129bool MDPVersion::supportsBWC() {
130    // BWC - Bandwidth Compression
131    return (mFeatures & MDP_BWC_EN);
132}
133
134bool MDPVersion::is8x26() {
135    // check for 8x26 variants
136    // chip variants have same major number and minor numbers usually vary
137    // for e.g., MDSS_MDP_HW_REV_101 is 0x10010000
138    //                                    1001       -  major number
139    //                                        0000   -  minor number
140    // 8x26 v1 minor number is 0000
141    //      v2 minor number is 0001 etc..
142    if( mMdpRev >= MDSS_MDP_HW_REV_101 && mMdpRev < MDSS_MDP_HW_REV_102) {
143        return true;
144    }
145    return false;
146}
147
148}; //namespace qdutils
149
150