Remove frame rate flexibility token
Remove the frame rate flexiblity token which can be replaced with
DisplayManager.setRefreshRateSwitchingType(
DisplayManager.SWITCHING_TYPE_ACROSS_AND_WITHIN_GROUPS);
DisplayManager.setShouldAlwaysRespectAppRequestedMode(true);
Bug: 175371491
Test: m
Test: manually test that backdoor still works
adb shell dumpsys SurfaceFlinger | grep -A 15 "DesiredDisplayModeSpecs"
verify no override
adb shell service call SurfaceFlinger 1036 i32 1
adb shell dumpsys SurfaceFlinger | grep -A 15 "DesiredDisplayModeSpecs"
verify there is override
adb shell service call SurfaceFlinger 1036 i32 0
adb shell dumpsys SurfaceFlinger | grep -A 15 "DesiredDisplayModeSpecs"
verify no override
verify idempotence:
adb shell service call SurfaceFlinger 1036 i32 0
adb shell service call SurfaceFlinger 1036 i32 0
adb shell service call SurfaceFlinger 1036 i32 1
adb shell service call SurfaceFlinger 1036 i32 1
Change-Id: I848f849037da38d245e940bc9c85727129463a81
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 8d7221c..6bd5b01 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -263,14 +263,6 @@
return dataspace == Dataspace::V0_SRGB || dataspace == Dataspace::DISPLAY_P3;
}
-class FrameRateFlexibilityToken : public BBinder {
-public:
- FrameRateFlexibilityToken(std::function<void()> callback) : mCallback(callback) {}
- virtual ~FrameRateFlexibilityToken() { mCallback(); }
-
-private:
- std::function<void()> mCallback;
-};
enum Permission {
ACCESS_SURFACE_FLINGER = 0x1,
@@ -5154,11 +5146,9 @@
case SET_GLOBAL_SHADOW_SETTINGS:
case GET_PRIMARY_PHYSICAL_DISPLAY_ID:
case ACQUIRE_FRAME_RATE_FLEXIBILITY_TOKEN: {
- // ACQUIRE_FRAME_RATE_FLEXIBILITY_TOKEN and OVERRIDE_HDR_TYPES are used by CTS tests,
- // which acquire the necessary permission dynamically. Don't use the permission cache
- // for this check.
- bool usePermissionCache =
- code != ACQUIRE_FRAME_RATE_FLEXIBILITY_TOKEN && code != OVERRIDE_HDR_TYPES;
+ // OVERRIDE_HDR_TYPES is used by CTS tests, which acquire the necessary
+ // permission dynamically. Don't use the permission cache for this check.
+ bool usePermissionCache = code != OVERRIDE_HDR_TYPES;
if (!callingThreadHasUnscopedSurfaceFlingerAccess(usePermissionCache)) {
IPCThreadState* ipc = IPCThreadState::self();
ALOGE("Permission Denial: can't access SurfaceFlinger pid=%d, uid=%d",
@@ -5610,17 +5600,39 @@
mDebugDisplayModeSetByBackdoor = result == NO_ERROR;
return result;
}
+ // Turn on/off frame rate flexibility mode. When turned on it overrides the display
+ // manager frame rate policy a new policy which allows switching between all refresh
+ // rates.
case 1036: {
- if (data.readInt32() > 0) {
- status_t result =
- acquireFrameRateFlexibilityToken(&mDebugFrameRateFlexibilityToken);
- if (result != NO_ERROR) {
- return result;
- }
- } else {
- mDebugFrameRateFlexibilityToken = nullptr;
+ if (data.readInt32() > 0) { // turn on
+ return schedule([this] {
+ const auto display = ON_MAIN_THREAD(getDefaultDisplayDeviceLocked());
+
+ // This is a little racy, but not in a way that hurts anything. As we
+ // grab the defaultMode from the display manager policy, we could be
+ // setting a new display manager policy, leaving us using a stale
+ // defaultMode. The defaultMode doesn't matter for the override
+ // policy though, since we set allowGroupSwitching to true, so it's
+ // not a problem.
+ scheduler::RefreshRateConfigs::Policy overridePolicy;
+ overridePolicy.defaultMode = display->refreshRateConfigs()
+ .getDisplayManagerPolicy()
+ .defaultMode;
+ overridePolicy.allowGroupSwitching = true;
+ constexpr bool kOverridePolicy = true;
+ return setDesiredDisplayModeSpecsInternal(display, overridePolicy,
+ kOverridePolicy);
+ })
+ .get();
+ } else { // turn off
+ return schedule([this] {
+ const auto display = ON_MAIN_THREAD(getDefaultDisplayDeviceLocked());
+ constexpr bool kOverridePolicy = true;
+ return setDesiredDisplayModeSpecsInternal(display, {},
+ kOverridePolicy);
+ })
+ .get();
}
- return NO_ERROR;
}
// Inject a hotplug connected event for the primary display. This will deallocate and
// reallocate the display state including framebuffers.
@@ -6616,74 +6628,6 @@
return NO_ERROR;
}
-status_t SurfaceFlinger::acquireFrameRateFlexibilityToken(sp<IBinder>* outToken) {
- if (!outToken) {
- return BAD_VALUE;
- }
-
- auto future = schedule([this] {
- status_t result = NO_ERROR;
- sp<IBinder> token;
-
- if (mFrameRateFlexibilityTokenCount == 0) {
- const auto display = ON_MAIN_THREAD(getDefaultDisplayDeviceLocked());
-
- // This is a little racy, but not in a way that hurts anything. As we grab the
- // defaultMode from the display manager policy, we could be setting a new display
- // manager policy, leaving us using a stale defaultMode. The defaultMode doesn't
- // matter for the override policy though, since we set allowGroupSwitching to
- // true, so it's not a problem.
- scheduler::RefreshRateConfigs::Policy overridePolicy;
- overridePolicy.defaultMode =
- display->refreshRateConfigs().getDisplayManagerPolicy().defaultMode;
- overridePolicy.allowGroupSwitching = true;
- constexpr bool kOverridePolicy = true;
- result = setDesiredDisplayModeSpecsInternal(display, overridePolicy, kOverridePolicy);
- }
-
- if (result == NO_ERROR) {
- mFrameRateFlexibilityTokenCount++;
- // Handing out a reference to the SurfaceFlinger object, as we're doing in the line
- // below, is something to consider carefully. The lifetime of the
- // FrameRateFlexibilityToken isn't tied to SurfaceFlinger object lifetime, so if this
- // SurfaceFlinger object were to be destroyed while the token still exists, the token
- // destructor would be accessing a stale SurfaceFlinger reference, and crash. This is ok
- // in this case, for two reasons:
- // 1. Once SurfaceFlinger::run() is called by main_surfaceflinger.cpp, the only way
- // the program exits is via a crash. So we won't have a situation where the
- // SurfaceFlinger object is dead but the process is still up.
- // 2. The frame rate flexibility token is acquired/released only by CTS tests, so even
- // if condition 1 were changed, the problem would only show up when running CTS tests,
- // not on end user devices, so we could spot it and fix it without serious impact.
- token = new FrameRateFlexibilityToken(
- [this]() { onFrameRateFlexibilityTokenReleased(); });
- ALOGD("Frame rate flexibility token acquired. count=%d",
- mFrameRateFlexibilityTokenCount);
- }
-
- return std::make_pair(result, token);
- });
-
- status_t result;
- std::tie(result, *outToken) = future.get();
- return result;
-}
-
-void SurfaceFlinger::onFrameRateFlexibilityTokenReleased() {
- static_cast<void>(schedule([this] {
- LOG_ALWAYS_FATAL_IF(mFrameRateFlexibilityTokenCount == 0,
- "Failed tracking frame rate flexibility tokens");
- mFrameRateFlexibilityTokenCount--;
- ALOGD("Frame rate flexibility token released. count=%d", mFrameRateFlexibilityTokenCount);
- if (mFrameRateFlexibilityTokenCount == 0) {
- const auto display = ON_MAIN_THREAD(getDefaultDisplayDeviceLocked());
- constexpr bool kOverridePolicy = true;
- status_t result = setDesiredDisplayModeSpecsInternal(display, {}, kOverridePolicy);
- LOG_ALWAYS_FATAL_IF(result < 0, "Failed releasing frame rate flexibility token");
- }
- }));
-}
-
status_t SurfaceFlinger::setFrameTimelineInfo(const sp<IGraphicBufferProducer>& surface,
const FrameTimelineInfo& frameTimelineInfo) {
Mutex::Autolock lock(mStateLock);