LineageOS/android_vendor_qcom_opensource_display-commonsys-intf
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hwc: Writeback for ad is needed only for split displays.

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Writeback for assertive display feature is needed only for
split displays and only if ro.qcom.ad is set to 2 by OEM.
This patch removes the unnecessary code and adds the relevant
conditional checks for split displays and property value

Change-Id: Ic36f28441d1a6e93132316b33fe1cf98a6e1efe4
This commit is contained in:
Saurabh Shah
2013-09-03 13:12:14 -07:00
parent 88e4d277ad
commit c4f1fa691c
4 changed files with 19 additions and 19 deletions
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20
libhwcomposer/hwc_ad.cpp
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@@ -124,14 +124,28 @@ static int adRead() {
return ret;
}
AssertiveDisplay::AssertiveDisplay() :mWbFd(-1), mDoable(false),
mFeatureEnabled(false), mDest(overlay::utils::OV_INVALID) {
AssertiveDisplay::AssertiveDisplay(hwc_context_t *ctx) : mWbFd(-1),
mDoable(false), mFeatureEnabled(false),
mDest(overlay::utils::OV_INVALID) {
int fd = openWbFb();
if(fd >= 0) {
//Values in ad node:
//-1 means feature is disabled on device
// 0 means feature exists but turned off, will be turned on by hwc
// 1 means feature is turned on by hwc
if(adRead() >= 0) {
// Plus, we do this feature only on split primary displays.
// Plus, we do this feature only if ro.qcom.ad=2
char property[PROPERTY_VALUE_MAX];
const int ENABLED = 2;
int val = 0;
if(property_get("ro.qcom.ad", property, "0") > 0) {
val = atoi(property);
}
if(adRead() >= 0 && isDisplaySplit(ctx, HWC_DISPLAY_PRIMARY) &&
val == ENABLED) {
ALOGD_IF(DEBUG, "Assertive display feature supported");
mFeatureEnabled = true;
}