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#ifdef HDMI_STUB
35int getHDMINode(void)
36{
37    ALOGD_IF(QD_UTILS_DEBUG, "%s: HDMI_STUB\n", __func__);
38    return -1;
39}
40
41int getEdidRawData(char *buffer)
42{
43    ALOGD_IF(QD_UTILS_DEBUG, "%s: HDMI_STUB\n", __func__);
44    (void) buffer;
45    return 0;
46}
47#else
48int 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
81int 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 */
110void 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