LineageOS/android_vendor_qcom_opensource_display-commonsys-intf
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libexternal: enable HPD if target supports HDMI

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enable HPD only on targets that has valid HDMI fb device.

Change-Id: Ia43d9138167b6ab3a887f7663a05831a2fcc09ea
CRs-fixed: 506363
This commit is contained in:
Arun Kumar K.R
2013-06-26 16:20:30 -07:00
parent 34e8b81174
commit 47d6b64faa
1 changed files with 20 additions and 18 deletions
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38
libexternal/external.cpp
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@@ -670,26 +670,28 @@ int ExternalDisplay::getExtFbNum(int &fbNum) {
bool ExternalDisplay::writeHPDOption(int userOption) const bool ExternalDisplay::writeHPDOption(int userOption) const
{ {
bool ret = true; bool ret = true;
char sysFsHPDFilePath[MAX_SYSFS_FILE_PATH]; if(mHdmiFbNum != -1) {
snprintf(sysFsHPDFilePath ,sizeof(sysFsHPDFilePath), char sysFsHPDFilePath[MAX_SYSFS_FILE_PATH];
"/sys/devices/virtual/graphics/fb%d/hpd", mHdmiFbNum); snprintf(sysFsHPDFilePath ,sizeof(sysFsHPDFilePath),
int hdmiHPDFile = open(sysFsHPDFilePath,O_RDWR, 0); "/sys/devices/virtual/graphics/fb%d/hpd", mHdmiFbNum);
if (hdmiHPDFile < 0) { int hdmiHPDFile = open(sysFsHPDFilePath,O_RDWR, 0);
ALOGE("%s: state file '%s' not found : ret%d err str: %s", __FUNCTION__, if (hdmiHPDFile < 0) {
sysFsHPDFilePath, hdmiHPDFile, strerror(errno)); ALOGE("%s: state file '%s' not found : ret%d err str: %s", __FUNCTION__,
ret = false; sysFsHPDFilePath, hdmiHPDFile, strerror(errno));
} else {
int err = -1;
ALOGD_IF(DEBUG, "%s: option = %d", __FUNCTION__, userOption);
if(userOption)
err = write(hdmiHPDFile, "1", 2);
else
err = write(hdmiHPDFile, "0" , 2);
if (err <= 0) {
ALOGE("%s: file write failed '%s'", __FUNCTION__, sysFsHPDFilePath);
ret = false; ret = false;
} else {
int err = -1;
ALOGD_IF(DEBUG, "%s: option = %d", __FUNCTION__, userOption);
if(userOption)
err = write(hdmiHPDFile, "1", 2);
else
err = write(hdmiHPDFile, "0" , 2);
if (err <= 0) {
ALOGE("%s: file write failed '%s'", __FUNCTION__, sysFsHPDFilePath);
ret = false;
}
close(hdmiHPDFile);
} }
close(hdmiHPDFile);
} }
return ret; return ret;
} }