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
33namespace qdutils {
34
35int 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
68int 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 */
96void 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