SurfaceFlinger: add setAllowedDisplayConfigs

Add an API to ISurfaceComposer to set allowed display configurations.
This API is expected to be called by DisplayManager depends on the
current policy in place. Once setAllowedDisplayConfigs is called,
SF can only set a new display config if it is part of the allowed
configurations list.

Test: call setAllowedDisplayConfigs() from backdoor and
      observe config change.
Bug: 122905403
Change-Id: I1d0a3649bbe7a08efeb72dc270f0b2df330b021c

2 files changed, 15 insertions, 1 deletions

diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index e6700e77d..0d5b7679e 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -359,6 +359,14 @@ public:
      * Removes a listener that was streaming median luma updates from SurfaceFlinger.
      */
     virtual status_t removeRegionSamplingListener(const sp<IRegionSamplingListener>& listener) = 0;
+
+    /*
+     * Sets the allowed display configurations to be used.
+     * The allowedConfigs in a vector of indexes corresponding to the configurations
+     * returned from getDisplayConfigs().
+     */
+    virtual status_t setAllowedDisplayConfigs(const sp<IBinder>& displayToken,
+                                              const std::vector<int32_t>& allowedConfigs) = 0;
 };
 
 // ----------------------------------------------------------------------------
@@ -406,7 +414,7 @@ public:
         GET_PHYSICAL_DISPLAY_IDS,
         ADD_REGION_SAMPLING_LISTENER,
         REMOVE_REGION_SAMPLING_LISTENER,
-
+        SET_ALLOWED_DISPLAY_CONFIGS,
         // Always append new enum to the end.
     };
 
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index cb38209f6..3c52b105b 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -111,6 +111,12 @@ public:
     // returned by getDisplayInfo
     static status_t setActiveConfig(const sp<IBinder>& display, int id);
 
+    // Sets the allowed display configurations to be used.
+    // The allowedConfigs in a vector of indexes corresponding to the configurations
+    // returned from getDisplayConfigs().
+    static status_t setAllowedDisplayConfigs(const sp<IBinder>& displayToken,
+                                             const std::vector<int32_t>& allowedConfigs);
+
     // Gets the list of supported color modes for the given display
     static status_t getDisplayColorModes(const sp<IBinder>& display,
             Vector<ui::ColorMode>* outColorModes);