SurfaceFlinger: add a backdoor to override DisplayManager policy
Added a new backdoor, for debugging purposes, to override DisplayManager
policy and allow SurfaceFlinger to freely switch refresh rates.
To override DisplayManager policy:
adb shell service call SurfaceFlinger 1036 i32 1
To undo the override
adb shell service call SurfaceFlinger 1036 i32 0
Bug: 152411921
Test: override policy by backdoor and observe dumpsys SurfaceFlinger
Change-Id: I14bb4722986f6df9100959eea66e5e3a3fa6f953
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 3264642..1c5b32c 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -4398,11 +4398,19 @@
scheduler::RefreshRateConfigs::Policy policy = mRefreshRateConfigs->getDisplayManagerPolicy();
StringAppendF(&result,
- "DesiredDisplayConfigSpecs: default config ID: %d"
+ "DesiredDisplayConfigSpecs (DisplayManager): default config ID: %d"
", min: %.2f Hz, max: %.2f Hz",
policy.defaultConfig.value(), policy.minRefreshRate, policy.maxRefreshRate);
StringAppendF(&result, "(config override by backdoor: %s)\n\n",
mDebugDisplayConfigSetByBackdoor ? "yes" : "no");
+ scheduler::RefreshRateConfigs::Policy currentPolicy = mRefreshRateConfigs->getCurrentPolicy();
+ if (currentPolicy != policy) {
+ StringAppendF(&result,
+ "DesiredDisplayConfigSpecs (Override): default config ID: %d"
+ ", min: %.2f Hz, max: %.2f Hz\n\n",
+ currentPolicy.defaultConfig.value(), currentPolicy.minRefreshRate,
+ currentPolicy.maxRefreshRate);
+ }
mScheduler->dump(mAppConnectionHandle, result);
mScheduler->getPrimaryDispSync().dump(result);
@@ -4927,9 +4935,9 @@
code == IBinder::SYSPROPS_TRANSACTION) {
return OK;
}
- // Numbers from 1000 to 1034 are currently used for backdoors. The code
+ // Numbers from 1000 to 1036 are currently used for backdoors. The code
// in onTransact verifies that the user is root, and has access to use SF.
- if (code >= 1000 && code <= 1035) {
+ if (code >= 1000 && code <= 1036) {
ALOGV("Accessing SurfaceFlinger through backdoor code: %u", code);
return OK;
}
@@ -5258,6 +5266,18 @@
}
return NO_ERROR;
}
+ case 1036: {
+ if (data.readInt32() > 0) {
+ status_t result =
+ acquireFrameRateFlexibilityToken(&mDebugFrameRateFlexibilityToken);
+ if (result != NO_ERROR) {
+ return result;
+ }
+ } else {
+ mDebugFrameRateFlexibilityToken = nullptr;
+ }
+ return NO_ERROR;
+ }
}
}
return err;