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
32
33 #define MAX_FRAME_BUFFER_NAME_SIZE (80)
34 #define QD_UTILS_DEBUG 0
35
getHDMINode(void)36 int getHDMINode(void)
37 {
38 FILE *displayDeviceFP = NULL;
39 char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
40 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
41 int j = 0;
42
43 for(j = 0; j < HWC_NUM_DISPLAY_TYPES; j++) {
44 snprintf (msmFbTypePath, sizeof(msmFbTypePath),
45 "/sys/class/graphics/fb%d/msm_fb_type", j);
46 displayDeviceFP = fopen(msmFbTypePath, "r");
47 if(displayDeviceFP) {
48 fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
49 displayDeviceFP);
50 if(strncmp(fbType, "dtv panel", strlen("dtv panel")) == 0) {
51 ALOGD("%s: HDMI is at fb%d", __func__, j);
52 fclose(displayDeviceFP);
53 break;
54 }
55 fclose(displayDeviceFP);
56 } else {
57 ALOGE("%s: Failed to open fb node %d", __func__, j);
58 }
59 }
60
61 if (j < HWC_NUM_DISPLAY_TYPES)
62 return j;
63 else
64 ALOGE("%s: Failed to find HDMI node", __func__);
65
66 return -1;
67 }
68
getEdidRawData(char * buffer)69 int getEdidRawData(char *buffer)
70 {
71 int size;
72 int edidFile;
73 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
74 int node_id = getHDMINode();
75
76 if (node_id < 0) {
77 ALOGE("%s no HDMI node found", __func__);
78 return 0;
79 }
80
81 snprintf(msmFbTypePath, sizeof(msmFbTypePath),
82 "/sys/class/graphics/fb%d/edid_raw_data", node_id);
83
84 edidFile = open(msmFbTypePath, O_RDONLY, 0);
85
86 if (edidFile < 0) {
87 ALOGE("%s no edid raw data found", __func__);
88 return 0;
89 }
90
91 size = (int)read(edidFile, (char*)buffer, EDID_RAW_DATA_SIZE);
92 close(edidFile);
93 return size;
94 }
95
96 /* Calculates the aspect ratio for based on src & dest */
getAspectRatioPosition(int destWidth,int destHeight,int srcWidth,int srcHeight,hwc_rect_t & rect)97 void getAspectRatioPosition(int destWidth, int destHeight, int srcWidth,
98 int srcHeight, hwc_rect_t& rect) {
99 int x =0, y =0;
100
101 if (srcWidth * destHeight > destWidth * srcHeight) {
102 srcHeight = destWidth * srcHeight / srcWidth;
103 srcWidth = destWidth;
104 } else if (srcWidth * destHeight < destWidth * srcHeight) {
105 srcWidth = destHeight * srcWidth / srcHeight;
106 srcHeight = destHeight;
107 } else {
108 srcWidth = destWidth;
109 srcHeight = destHeight;
110 }
111 if (srcWidth > destWidth) srcWidth = destWidth;
112 if (srcHeight > destHeight) srcHeight = destHeight;
113 x = (destWidth - srcWidth) / 2;
114 y = (destHeight - srcHeight) / 2;
115 ALOGD_IF(QD_UTILS_DEBUG, "%s: AS Position: x = %d, y = %d w = %d h = %d",
116 __FUNCTION__, x, y, srcWidth , srcHeight);
117 // Convert it back to hwc_rect_t
118 rect.left = x;
119 rect.top = y;
120 rect.right = srcWidth + rect.left;
121 rect.bottom = srcHeight + rect.top;
122 }
123
124