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 #ifdef HDMI_STUB
getHDMINode(void)35 int getHDMINode(void)
36 {
37 ALOGD_IF(QD_UTILS_DEBUG, "%s: HDMI_STUB\n", __func__);
38 return -1;
39 }
40
getEdidRawData(char * buffer)41 int getEdidRawData(char *buffer)
42 {
43 ALOGD_IF(QD_UTILS_DEBUG, "%s: HDMI_STUB\n", __func__);
44 (void) buffer;
45 return 0;
46 }
47 #else
48 int getHDMINode(void)
49 {
50 FILE *displayDeviceFP = NULL;
51 char fbType[MAX_FRAME_BUFFER_NAME_SIZE];
52 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
53 int j = 0;
54
55 for(j = 0; j < HWC_NUM_DISPLAY_TYPES; j++) {
56 snprintf (msmFbTypePath, sizeof(msmFbTypePath),
57 "/sys/class/graphics/fb%d/msm_fb_type", j);
58 displayDeviceFP = fopen(msmFbTypePath, "r");
59 if(displayDeviceFP) {
60 fread(fbType, sizeof(char), MAX_FRAME_BUFFER_NAME_SIZE,
61 displayDeviceFP);
62 if(strncmp(fbType, "dtv panel", strlen("dtv panel")) == 0) {
63 ALOGD("%s: HDMI is at fb%d", __func__, j);
64 fclose(displayDeviceFP);
65 break;
66 }
67 fclose(displayDeviceFP);
68 } else {
69 ALOGE("%s: Failed to open fb node %d", __func__, j);
70 }
71 }
72
73 if (j < HWC_NUM_DISPLAY_TYPES)
74 return j;
75 else
76 ALOGE("%s: Failed to find HDMI node", __func__);
77
78 return -1;
79 }
80
81 int getEdidRawData(char *buffer)
82 {
83 int size;
84 int edidFile;
85 char msmFbTypePath[MAX_FRAME_BUFFER_NAME_SIZE];
86 int node_id = getHDMINode();
87
88 if (node_id < 0) {
89 ALOGE("%s no HDMI node found", __func__);
90 return 0;
91 }
92
93 snprintf(msmFbTypePath, sizeof(msmFbTypePath),
94 "/sys/class/graphics/fb%d/edid_raw_data", node_id);
95
96 edidFile = open(msmFbTypePath, O_RDONLY, 0);
97
98 if (edidFile < 0) {
99 ALOGE("%s no edid raw data found", __func__);
100 return 0;
101 }
102
103 size = (int)read(edidFile, (char*)buffer, EDID_RAW_DATA_SIZE);
104 close(edidFile);
105 return size;
106 }
107 #endif
108
109 /* Calculates the aspect ratio for based on src & dest */
getAspectRatioPosition(int destWidth,int destHeight,int srcWidth,int srcHeight,hwc_rect_t & rect)110 void getAspectRatioPosition(int destWidth, int destHeight, int srcWidth,
111 int srcHeight, hwc_rect_t& rect) {
112 int x =0, y =0;
113
114 if (srcWidth * destHeight > destWidth * srcHeight) {
115 srcHeight = destWidth * srcHeight / srcWidth;
116 srcWidth = destWidth;
117 } else if (srcWidth * destHeight < destWidth * srcHeight) {
118 srcWidth = destHeight * srcWidth / srcHeight;
119 srcHeight = destHeight;
120 } else {
121 srcWidth = destWidth;
122 srcHeight = destHeight;
123 }
124 if (srcWidth > destWidth) srcWidth = destWidth;
125 if (srcHeight > destHeight) srcHeight = destHeight;
126 x = (destWidth - srcWidth) / 2;
127 y = (destHeight - srcHeight) / 2;
128 ALOGD_IF(QD_UTILS_DEBUG, "%s: AS Position: x = %d, y = %d w = %d h = %d",
129 __FUNCTION__, x, y, srcWidth , srcHeight);
130 // Convert it back to hwc_rect_t
131 rect.left = x;
132 rect.top = y;
133 rect.right = srcWidth + rect.left;
134 rect.bottom = srcHeight + rect.top;
135 }
136
137 }; //namespace qdutils
138