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
36int 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
69int 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 */
97void 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