mdp_version.cpp revision c38cdae859e0ee12ad3284a308eaeef9d2708c74 
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 <linux/msm_mdp.h>
31#include "mdp_version.h"
32
33#define DEBUG 0
34
35ANDROID_SINGLETON_STATIC_INSTANCE(qdutils::MDPVersion);
36namespace qdutils {
37
38#define TOKEN_PARAMS_DELIM  "="
39
40MDPVersion::MDPVersion()
41{
42    mMDPVersion = MDSS_V5;
43    mMdpRev = 0;
44    mRGBPipes = 0;
45    mVGPipes = 0;
46    mDMAPipes = 0;
47    mFeatures = 0;
48    mMDPUpscale = 0;
49    mMDPDownscale = 0;
50    mMacroTileEnabled = false;
51    mPanelType = NO_PANEL;
52    mLowBw = 0;
53    mHighBw = 0;
54
55    if(!updatePanelInfo()) {
56        ALOGE("Unable to read Primary Panel Information");
57    }
58    if(!updateSysFsInfo()) {
59        ALOGE("Unable to read display sysfs node");
60    }
61    if (mMdpRev == MDP_V3_0_4){
62        mMDPVersion = MDP_V3_0_4;
63    }
64
65    mHasOverlay = false;
66    if((mMDPVersion >= MDP_V4_0) ||
67       (mMDPVersion == MDP_V_UNKNOWN) ||
68       (mMDPVersion == MDP_V3_0_4))
69        mHasOverlay = true;
70    if(!updateSplitInfo()) {
71        ALOGE("Unable to read display split node");
72    }
73}
74
75MDPVersion::~MDPVersion() {
76    close(mFd);
77}
78
79int MDPVersion::tokenizeParams(char *inputParams, const char *delim,
80                                char* tokenStr[], int *idx) {
81    char *tmp_token = NULL;
82    char *temp_ptr;
83    int ret = 0, index = 0;
84    if (!inputParams) {
85        return -1;
86    }
87    tmp_token = strtok_r(inputParams, delim, &temp_ptr);
88    while (tmp_token != NULL) {
89        tokenStr[index++] = tmp_token;
90        tmp_token = strtok_r(NULL, " ", &temp_ptr);
91    }
92    *idx = index;
93    return 0;
94}
95// This function reads the sysfs node to read the primary panel type
96// and updates information accordingly
97bool MDPVersion::updatePanelInfo() {
98    FILE *displayDeviceFP = NULL;
99    const int MAX_FRAME_BUFFER_NAME_SIZE = 128;
100    char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
101    const char *strCmdPanel = "mipi dsi cmd panel";
102    const char *strVideoPanel = "mipi dsi video panel";
103    const char *strLVDSPanel = "lvds panel";
104    const char *strEDPPanel = "edp panel";
105
106    displayDeviceFP = fopen("/sys/class/graphics/fb0/msm_fb_type", "r");
107    if(displayDeviceFP){
108        fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
109                displayDeviceFP);
110        if(strncmp(fbType, strCmdPanel, strlen(strCmdPanel)) == 0) {
111            mPanelType = MIPI_CMD_PANEL;
112        }
113        else if(strncmp(fbType, strVideoPanel, strlen(strVideoPanel)) == 0) {
114            mPanelType = MIPI_VIDEO_PANEL;
115        }
116        else if(strncmp(fbType, strLVDSPanel, strlen(strLVDSPanel)) == 0) {
117            mPanelType = LVDS_PANEL;
118        }
119        else if(strncmp(fbType, strEDPPanel, strlen(strEDPPanel)) == 0) {
120            mPanelType = EDP_PANEL;
121        }
122        fclose(displayDeviceFP);
123        return true;
124    }else {
125        return false;
126    }
127}
128
129// This function reads the sysfs node to read MDP capabilities
130// and parses and updates information accordingly.
131bool MDPVersion::updateSysFsInfo() {
132    FILE *sysfsFd;
133    size_t len = 0;
134    ssize_t read;
135    char *line = NULL;
136    char sysfsPath[255];
137    memset(sysfsPath, 0, sizeof(sysfsPath));
138    snprintf(sysfsPath , sizeof(sysfsPath),
139            "/sys/class/graphics/fb0/mdp/caps");
140    char property[PROPERTY_VALUE_MAX];
141    bool enableMacroTile = false;
142
143    if((property_get("persist.hwc.macro_tile_enable", property, NULL) > 0) &&
144       (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
145        (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
146        enableMacroTile = true;
147    }
148
149    sysfsFd = fopen(sysfsPath, "rb");
150
151    if (sysfsFd == NULL) {
152        ALOGE("%s: sysFsFile file '%s' not found",
153                __FUNCTION__, sysfsPath);
154        return false;
155    } else {
156        while((read = getline(&line, &len, sysfsFd)) != -1) {
157            int index=0;
158            char *tokens[10];
159            memset(tokens, 0, sizeof(tokens));
160
161            // parse the line and update information accordingly
162            if(!tokenizeParams(line, TOKEN_PARAMS_DELIM, tokens, &index)) {
163                if(!strncmp(tokens[0], "hw_rev", strlen("hw_rev"))) {
164                    mMdpRev = atoi(tokens[1]);
165                }
166                else if(!strncmp(tokens[0], "rgb_pipes", strlen("rgb_pipes"))) {
167                    mRGBPipes = atoi(tokens[1]);
168                }
169                else if(!strncmp(tokens[0], "vig_pipes", strlen("vig_pipes"))) {
170                    mVGPipes = atoi(tokens[1]);
171                }
172                else if(!strncmp(tokens[0], "dma_pipes", strlen("dma_pipes"))) {
173                    mDMAPipes = atoi(tokens[1]);
174                }
175                else if(!strncmp(tokens[0], "max_downscale_ratio",
176                                strlen("max_downscale_ratio"))) {
177                    mMDPDownscale = atoi(tokens[1]);
178                }
179                else if(!strncmp(tokens[0], "max_upscale_ratio",
180                                strlen("max_upscale_ratio"))) {
181                    mMDPUpscale = atoi(tokens[1]);
182                } else if(!strncmp(tokens[0], "max_bandwidth_low",
183                        strlen("max_bandwidth_low"))) {
184                    mLowBw = atol(tokens[1]);
185                } else if(!strncmp(tokens[0], "max_bandwidth_high",
186                        strlen("max_bandwidth_high"))) {
187                    mHighBw = atol(tokens[1]);
188                } else if(!strncmp(tokens[0], "features", strlen("features"))) {
189                    for(int i=1; i<index;i++) {
190                        if(!strncmp(tokens[i], "bwc", strlen("bwc"))) {
191                           mFeatures |= MDP_BWC_EN;
192                        }
193                        else if(!strncmp(tokens[i], "decimation",
194                                    strlen("decimation"))) {
195                           mFeatures |= MDP_DECIMATION_EN;
196                        }
197                        else if(!strncmp(tokens[i], "tile_format",
198                                    strlen("tile_format"))) {
199                           if(enableMacroTile)
200                               mMacroTileEnabled = true;
201                        }
202                    }
203                }
204            }
205            free(line);
206            line = NULL;
207        }
208        fclose(sysfsFd);
209    }
210    ALOGD_IF(DEBUG, "%s: mMDPVersion: %d mMdpRev: %x mRGBPipes:%d,"
211                    "mVGPipes:%d", __FUNCTION__, mMDPVersion, mMdpRev,
212                    mRGBPipes, mVGPipes);
213    ALOGD_IF(DEBUG, "%s:mDMAPipes:%d \t mMDPDownscale:%d, mFeatures:%d",
214                     __FUNCTION__,  mDMAPipes, mMDPDownscale, mFeatures);
215    ALOGD_IF(DEBUG, "%s:mLowBw: %lu mHighBw: %lu", __FUNCTION__,  mLowBw,
216            mHighBw);
217
218    return true;
219}
220
221// This function reads the sysfs node to read MDP capabilities
222// and parses and updates information accordingly.
223bool MDPVersion::updateSplitInfo() {
224    if(mMDPVersion >= MDSS_V5) {
225        char split[64] = {0};
226        FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
227        if(fp){
228            //Format "left right" space as delimiter
229            if(fread(split, sizeof(char), 64, fp)) {
230                mSplit.mLeft = atoi(split);
231                ALOGI_IF(mSplit.mLeft, "Left Split=%d", mSplit.mLeft);
232                char *rght = strpbrk(split, " ");
233                if(rght)
234                    mSplit.mRight = atoi(rght + 1);
235                ALOGI_IF(mSplit.mRight, "Right Split=%d", mSplit.mRight);
236            }
237        } else {
238            ALOGE("Failed to open mdss_fb_split node");
239            return false;
240        }
241        if(fp)
242            fclose(fp);
243    }
244    return true;
245}
246
247
248bool MDPVersion::supportsDecimation() {
249    return mFeatures & MDP_DECIMATION_EN;
250}
251
252uint32_t MDPVersion::getMaxMDPDownscale() {
253    return mMDPDownscale;
254}
255
256bool MDPVersion::supportsBWC() {
257    // BWC - Bandwidth Compression
258    return (mFeatures & MDP_BWC_EN);
259}
260
261bool MDPVersion::supportsMacroTile() {
262    // MACRO TILE support
263    return mMacroTileEnabled;
264}
265
266}; //namespace qdutils
267
268