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94 lines
3.2 KiB
94 lines
3.2 KiB
/* |
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* Copyright (c) 2013, The Linux Foundation. All rights reserved. |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* * Neither the name of The Linux Foundation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "qd_utils.h" |
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#define MAX_FRAME_BUFFER_NAME_SIZE (80) |
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int getHDMINode(void) |
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{ |
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FILE *displayDeviceFP = NULL; |
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char fbType[MAX_FRAME_BUFFER_NAME_SIZE]; |
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char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE]; |
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int j = 0; |
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for(j = 0; j < HWC_NUM_DISPLAY_TYPES; j++) { |
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snprintf (msmFbTypePath, sizeof(msmFbTypePath), |
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"/sys/class/graphics/fb%d/msm_fb_type", j); |
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displayDeviceFP = fopen(msmFbTypePath, "r"); |
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if(displayDeviceFP) { |
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fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE, |
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displayDeviceFP); |
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if(strncmp(fbType, "dtv panel", strlen("dtv panel")) == 0) { |
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ALOGD("%s: HDMI is at fb%d", __func__, j); |
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fclose(displayDeviceFP); |
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break; |
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} |
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fclose(displayDeviceFP); |
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} else { |
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ALOGE("%s: Failed to open fb node %d", __func__, j); |
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} |
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} |
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if (j < HWC_NUM_DISPLAY_TYPES) |
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return j; |
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else |
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ALOGE("%s: Failed to find HDMI node", __func__); |
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return -1; |
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} |
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int getEdidRawData(char *buffer) |
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{ |
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int size; |
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int edidFile; |
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char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE]; |
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int node_id = getHDMINode(); |
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if (node_id < 0) { |
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ALOGE("%s no HDMI node found", __func__); |
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return 0; |
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} |
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snprintf(msmFbTypePath, sizeof(msmFbTypePath), |
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"/sys/class/graphics/fb%d/edid_raw_data", node_id); |
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edidFile = open(msmFbTypePath, O_RDONLY, 0); |
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if (edidFile < 0) { |
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ALOGE("%s no edid raw data found", __func__); |
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return 0; |
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} |
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size = (int)read(edidFile, (char*)buffer, EDID_RAW_DATA_SIZE); |
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close(edidFile); |
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return size; |
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} |
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