mdp_version.cpp revision 1b66878aec2d36dbc5aa9f8109885448431af236 
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    mPanelType = NO_PANEL;
51
52    if(!updatePanelInfo()) {
53        ALOGE("Unable to read Primary Panel Information");
54    }
55    if(!updateSysFsInfo()) {
56        ALOGE("Unable to read display sysfs node");
57    }
58    if (mMdpRev == MDP_V3_0_4){
59        mMDPVersion = MDP_V3_0_4;
60    }
61
62    mHasOverlay = false;
63    if((mMDPVersion >= MDP_V4_0) ||
64       (mMDPVersion == MDP_V_UNKNOWN) ||
65       (mMDPVersion == MDP_V3_0_4))
66        mHasOverlay = true;
67    if(!updateSplitInfo()) {
68        ALOGE("Unable to read display split node");
69    }
70}
71
72MDPVersion::~MDPVersion() {
73    close(mFd);
74}
75
76int MDPVersion::tokenizeParams(char *inputParams, const char *delim,
77                                char* tokenStr[], int *idx) {
78    char *tmp_token = NULL;
79    char *temp_ptr;
80    int ret = 0, index = 0;
81    if (!inputParams) {
82        return -1;
83    }
84    tmp_token = strtok_r(inputParams, delim, &temp_ptr);
85    while (tmp_token != NULL) {
86        tokenStr[index++] = tmp_token;
87        tmp_token = strtok_r(NULL, " ", &temp_ptr);
88    }
89    *idx = index;
90    return 0;
91}
92// This function reads the sysfs node to read the primary panel type
93// and updates information accordingly
94bool MDPVersion::updatePanelInfo() {
95    FILE *displayDeviceFP = NULL;
96    const int MAX_FRAME_BUFFER_NAME_SIZE = 128;
97    char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
98    const char *strCmdPanel = "mipi dsi cmd panel";
99    const char *strVideoPanel = "mipi dsi video panel";
100    const char *strLVDSPanel = "lvds panel";
101    const char *strEDPPanel = "edp panel";
102
103    displayDeviceFP = fopen("/sys/class/graphics/fb0/msm_fb_type", "r");
104    if(displayDeviceFP){
105        fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
106                displayDeviceFP);
107        if(strncmp(fbType, strCmdPanel, strlen(strCmdPanel)) == 0) {
108            mPanelType = MIPI_CMD_PANEL;
109        }
110        else if(strncmp(fbType, strVideoPanel, strlen(strVideoPanel)) == 0) {
111            mPanelType = MIPI_VIDEO_PANEL;
112        }
113        else if(strncmp(fbType, strLVDSPanel, strlen(strLVDSPanel)) == 0) {
114            mPanelType = LVDS_PANEL;
115        }
116        else if(strncmp(fbType, strEDPPanel, strlen(strEDPPanel)) == 0) {
117            mPanelType = EDP_PANEL;
118        }
119        fclose(displayDeviceFP);
120        return true;
121    }else {
122        return false;
123    }
124}
125
126// This function reads the sysfs node to read MDP capabilities
127// and parses and updates information accordingly.
128bool MDPVersion::updateSysFsInfo() {
129    FILE *sysfsFd;
130    size_t len = 0;
131    ssize_t read;
132    char *line = NULL;
133    char sysfsPath[255];
134    memset(sysfsPath, 0, sizeof(sysfsPath));
135    snprintf(sysfsPath , sizeof(sysfsPath),
136            "/sys/class/graphics/fb0/mdp/caps");
137
138    sysfsFd = fopen(sysfsPath, "rb");
139
140    if (sysfsFd == NULL) {
141        ALOGE("%s: sysFsFile file '%s' not found",
142                __FUNCTION__, sysfsPath);
143        return false;
144    } else {
145        while((read = getline(&line, &len, sysfsFd)) != -1) {
146            int index=0;
147            char *tokens[10];
148            memset(tokens, 0, sizeof(tokens));
149
150            // parse the line and update information accordingly
151            if(!tokenizeParams(line, TOKEN_PARAMS_DELIM, tokens, &index)) {
152                if(!strncmp(tokens[0], "hw_rev", strlen("hw_rev"))) {
153                    mMdpRev = atoi(tokens[1]);
154                }
155                else if(!strncmp(tokens[0], "rgb_pipes", strlen("rgb_pipes"))) {
156                    mRGBPipes = atoi(tokens[1]);
157                }
158                else if(!strncmp(tokens[0], "vig_pipes", strlen("vig_pipes"))) {
159                    mVGPipes = atoi(tokens[1]);
160                }
161                else if(!strncmp(tokens[0], "dma_pipes", strlen("dma_pipes"))) {
162                    mDMAPipes = atoi(tokens[1]);
163                }
164                else if(!strncmp(tokens[0], "max_downscale_ratio",
165                                strlen("max_downscale_ratio"))) {
166                    mMDPDownscale = atoi(tokens[1]);
167                }
168                else if(!strncmp(tokens[0], "max_upscale_ratio",
169                                strlen("max_upscale_ratio"))) {
170                    mMDPUpscale = atoi(tokens[1]);
171                }
172                else if(!strncmp(tokens[0], "features", strlen("features"))) {
173                    for(int i=1; i<index;i++) {
174                        if(!strncmp(tokens[i], "bwc", strlen("bwc"))) {
175                           mFeatures |= MDP_BWC_EN;
176                        }
177                        else if(!strncmp(tokens[i], "decimation",
178                                    strlen("decimation"))) {
179                           mFeatures |= MDP_DECIMATION_EN;
180                        }
181                    }
182                }
183            }
184            free(line);
185            line = NULL;
186        }
187        fclose(sysfsFd);
188    }
189    ALOGD_IF(DEBUG, "%s: mMDPVersion: %d mMdpRev: %x mRGBPipes:%d,"
190                    "mVGPipes:%d", __FUNCTION__, mMDPVersion, mMdpRev,
191                    mRGBPipes, mVGPipes);
192    ALOGD_IF(DEBUG, "%s:mDMAPipes:%d \t mMDPDownscale:%d, mFeatures:%d",
193                     __FUNCTION__,  mDMAPipes, mMDPDownscale, mFeatures);
194    return true;
195}
196
197// This function reads the sysfs node to read MDP capabilities
198// and parses and updates information accordingly.
199bool MDPVersion::updateSplitInfo() {
200    if(mMDPVersion >= MDSS_V5) {
201        char split[64] = {0};
202        FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
203        if(fp){
204            //Format "left right" space as delimiter
205            if(fread(split, sizeof(char), 64, fp)) {
206                mSplit.mLeft = atoi(split);
207                ALOGI_IF(mSplit.mLeft, "Left Split=%d", mSplit.mLeft);
208                char *rght = strpbrk(split, " ");
209                if(rght)
210                    mSplit.mRight = atoi(rght + 1);
211                ALOGI_IF(mSplit.mRight, "Right Split=%d", mSplit.mRight);
212            }
213        } else {
214            ALOGE("Failed to open mdss_fb_split node");
215            return false;
216        }
217        if(fp)
218            fclose(fp);
219    }
220    return true;
221}
222
223
224bool MDPVersion::supportsDecimation() {
225    return mFeatures & MDP_DECIMATION_EN;
226}
227
228uint32_t MDPVersion::getMaxMDPDownscale() {
229    return mMDPDownscale;
230}
231
232bool MDPVersion::supportsBWC() {
233    // BWC - Bandwidth Compression
234    return (mFeatures & MDP_BWC_EN);
235}
236
237bool MDPVersion::is8x26() {
238    // check for 8x26 variants
239    // chip variants have same major number and minor numbers usually vary
240    // for e.g., MDSS_MDP_HW_REV_101 is 0x10010000
241    //                                    1001       -  major number
242    //                                        0000   -  minor number
243    // 8x26 v1 minor number is 0000
244    //      v2 minor number is 0001 etc..
245    if( mMdpRev >= MDSS_MDP_HW_REV_101 && mMdpRev < MDSS_MDP_HW_REV_102) {
246        return true;
247    }
248    return false;
249}
250
251bool MDPVersion::is8x74v2() {
252    if( mMdpRev >= MDSS_MDP_HW_REV_102 && mMdpRev < MDSS_MDP_HW_REV_200) {
253        return true;
254    }
255    return false;
256}
257
258bool MDPVersion::is8x92() {
259    if( mMdpRev >= MDSS_MDP_HW_REV_200 && mMdpRev < MDSS_MDP_HW_REV_206) {
260        return true;
261    }
262    return false;
263}
264}; //namespace qdutils
265
266