1 /*
2 * Copyright (c) 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
30 #include "qd_utils.h"
31 #define QD_UTILS_DEBUG 0
32
33 namespace qdutils {
34
getHDMINode(void)35 int getHDMINode(void)
36 {
37 FILE *displayDeviceFP = NULL;
38 char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
39 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
40 int j = 0;
41
42 for(j = 0; j < HWC_NUM_DISPLAY_TYPES; j++) {
43 snprintf (msmFbTypePath, sizeof(msmFbTypePath),
44 "/sys/class/graphics/fb%d/msm_fb_type", j);
45 displayDeviceFP = fopen(msmFbTypePath, "r");
46 if(displayDeviceFP) {
47 fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
48 displayDeviceFP);
49 if(strncmp(fbType, "dtv panel", strlen("dtv panel")) == 0) {
50 ALOGD("%s: HDMI is at fb%d", __func__, j);
51 fclose(displayDeviceFP);
52 break;
53 }
54 fclose(displayDeviceFP);
55 } else {
56 ALOGD("%s: fb node %d not present", __func__, j);
57 }
58 }
59
60 if (j < HWC_NUM_DISPLAY_TYPES)
61 return j;
62 else
63 ALOGI("%s: No HDMI node on this device", __func__);
64
65 return -1;
66 }
67
getEdidRawData(char * buffer)68 int getEdidRawData(char *buffer)
69 {
70 int size;
71 int edidFile;
72 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
73 int node_id = getHDMINode();
74
75 if (node_id < 0) {
76 ALOGE("%s no HDMI node found", __func__);
77 return 0;
78 }
79
80 snprintf(msmFbTypePath, sizeof(msmFbTypePath),
81 "/sys/class/graphics/fb%d/edid_raw_data", node_id);
82
83 edidFile = open(msmFbTypePath, O_RDONLY, 0);
84
85 if (edidFile < 0) {
86 ALOGE("%s no edid raw data found", __func__);
87 return 0;
88 }
89
90 size = (int)read(edidFile, (char*)buffer, EDID_RAW_DATA_SIZE);
91 close(edidFile);
92 return size;
93 }
94
95 /* Calculates the aspect ratio for based on src & dest */
getAspectRatioPosition(int destWidth,int destHeight,int srcWidth,int srcHeight,hwc_rect_t & rect)96 void getAspectRatioPosition(int destWidth, int destHeight, int srcWidth,
97 int srcHeight, hwc_rect_t& rect) {
98 int x =0, y =0;
99
100 if (srcWidth * destHeight > destWidth * srcHeight) {
101 srcHeight = destWidth * srcHeight / srcWidth;
102 srcWidth = destWidth;
103 } else if (srcWidth * destHeight < destWidth * srcHeight) {
104 srcWidth = destHeight * srcWidth / srcHeight;
105 srcHeight = destHeight;
106 } else {
107 srcWidth = destWidth;
108 srcHeight = destHeight;
109 }
110 if (srcWidth > destWidth) srcWidth = destWidth;
111 if (srcHeight > destHeight) srcHeight = destHeight;
112 x = (destWidth - srcWidth) / 2;
113 y = (destHeight - srcHeight) / 2;
114 ALOGD_IF(QD_UTILS_DEBUG, "%s: AS Position: x = %d, y = %d w = %d h = %d",
115 __FUNCTION__, x, y, srcWidth , srcHeight);
116 // Convert it back to hwc_rect_t
117 rect.left = x;
118 rect.top = y;
119 rect.right = srcWidth + rect.left;
120 rect.bottom = srcHeight + rect.top;
121 }
122
123 }; //namespace qdutils
124