hwc2: Add support to query display wb capabilities

Virtual display uses hardware wb to get output data.
And output buffer format depends on wb hardware capabilities.

Change-Id: If06b9e36eeda630938b07933878fe2d148ea9bcb

common.mk

@@ -9,6 +9,9 @@ display_config_version := $(shell \
 display_config_version := $(shell \
     if [ -d "$(TOP)/vendor/qcom/opensource/interfaces/display/config/1.3" ];\
     then echo DISPLAY_CONFIG_1_3; fi)
+display_config_version := $(shell \
+    if [ -d "$(TOP)/vendor/qcom/opensource/interfaces/display/config/1.4" ];\
+    then echo DISPLAY_CONFIG_1_4; fi)
 #Common C flags
 common_flags := -Wno-missing-field-initializers
 common_flags += -Wconversion -Wall -Werror -std=c++14
@@ -27,6 +30,10 @@ endif
 ifeq ($(display_config_version), DISPLAY_CONFIG_1_3)
     common_flags += -DDISPLAY_CONFIG_1_1 -DDISPLAY_CONFIG_1_2 -DDISPLAY_CONFIG_1_3
 endif
+ifeq ($(display_config_version), DISPLAY_CONFIG_1_4)
+    common_flags += -DDISPLAY_CONFIG_1_1 -DDISPLAY_CONFIG_1_2
+    common_flags += -DDISPLAY_CONFIG_1_3 -DDISPLAY_CONFIG_1_4
+endif
 
 ifeq ($(TARGET_USES_COLOR_METADATA), true)
     common_flags += -DUSE_COLOR_METADATA

libdisplayconfig/DisplayConfig.h

@@ -83,6 +83,10 @@ struct DisplayHDRCapabilities {
     float min_luminance = 0.0f;
 };
 
+struct WriteBackCapabilities {
+    bool isWbUbwcSupported;
+};
+
 //=============================================================================
 // The functions below run in the client pocess and wherever necessary
 // do a binder call to HWC to get/set data.
@@ -104,6 +108,7 @@ int setIdleTimeout(uint32_t value);
 int getHDRCapabilities(int dpy, DisplayHDRCapabilities *caps);
 int setCameraLaunchStatus(uint32_t on);
 bool displayBWTransactionPending();
+int32_t getWriteBackCapabilities( WriteBackCapabilities *caps);
 
 } // namespace display
 

libdrmutils/drm_interface.h

@@ -601,6 +601,7 @@ struct DRMConnectorInfo {
   bool qsync_support;
   // Connection status of this connector
   bool is_connected;
+  bool is_wb_ubwc_supported;
 };
 
 // All DRM Connectors as map<Connector_id , connector_info>

sdm/include/core/core_interface.h

@@ -109,6 +109,7 @@ struct HWDisplayInfo {
   bool is_connected = false;                   //!< Connection status of the display.
   bool is_primary = false;                     //!< True only if this is the main display of the
                                                //!< device.
+  bool is_wb_ubwc_supported = true;            //!< check hardware wb ubwc support
 };
 
 /*! @brief Information on all displays as a map with display_id as key.

sdm/libs/core/drm/hw_info_drm.cpp

@@ -781,6 +781,7 @@ DisplayError HWInfoDRM::GetDisplaysStatus(HWDisplaysInfo *hw_displays_info) {
     }
     hw_info.is_connected = iter.second.is_connected ? 1 : 0;
     hw_info.is_primary = iter.second.is_primary ? 1 : 0;
+    hw_info.is_wb_ubwc_supported = iter.second.is_wb_ubwc_supported;
     if (hw_info.display_id >= 0) {
       (*hw_displays_info)[hw_info.display_id] = hw_info;
     }

sdm/libs/hwc2/Android.mk

@@ -38,6 +38,12 @@ LOCAL_SHARED_LIBRARIES        += [email protected]
 LOCAL_SHARED_LIBRARIES        += [email protected]
 LOCAL_SHARED_LIBRARIES        += [email protected]
 endif
+ifeq ($(display_config_version), DISPLAY_CONFIG_1_4)
+LOCAL_SHARED_LIBRARIES        += [email protected]
+LOCAL_SHARED_LIBRARIES        += [email protected]
+LOCAL_SHARED_LIBRARIES        += [email protected]
+LOCAL_SHARED_LIBRARIES        += [email protected]
+endif
 
 LOCAL_SRC_FILES               := hwc_session.cpp \
                                  hwc_session_services.cpp \

sdm/libs/hwc2/hwc_session.h

@@ -20,7 +20,9 @@
 #ifndef __HWC_SESSION_H__
 #define __HWC_SESSION_H__
 
-#ifdef DISPLAY_CONFIG_1_3
+#ifdef DISPLAY_CONFIG_1_4
+#include <vendor/display/config/1.4/IDisplayConfig.h>
+#elif DISPLAY_CONFIG_1_3
 #include <vendor/display/config/1.3/IDisplayConfig.h>
 #elif DISPLAY_CONFIG_1_2
 #include <vendor/display/config/1.2/IDisplayConfig.h>
@@ -49,7 +51,9 @@
 
 namespace sdm {
 
-#ifdef DISPLAY_CONFIG_1_3
+#ifdef DISPLAY_CONFIG_1_4
+using vendor::display::config::V1_4::IDisplayConfig;
+#elif  DISPLAY_CONFIG_1_3
 using vendor::display::config::V1_3::IDisplayConfig;
 #elif DISPLAY_CONFIG_1_2
 using vendor::display::config::V1_2::IDisplayConfig;
@@ -249,6 +253,7 @@ class HWCSession : hwc2_device_t, HWCUEventListener, IDisplayConfig, public qCli
   int32_t SetSecondaryDisplayStatus(int disp_id, HWCDisplay::DisplayStatus status);
   int32_t GetPanelBrightness(int *level);
   int32_t MinHdcpEncryptionLevelChanged(int disp_id, uint32_t min_enc_level);
+  int32_t IsWbUbwcSupported(int *value);
 
   // service methods
   void StartServices();
@@ -290,6 +295,9 @@ class HWCSession : hwc2_device_t, HWCUEventListener, IDisplayConfig, public qCli
 #ifdef DISPLAY_CONFIG_1_3
   Return<int32_t> controlIdlePowerCollapse(bool enable, bool synchronous) override;
 #endif
+#ifdef DISPLAY_CONFIG_1_4
+  Return<void> getWriteBackCapabilities(getWriteBackCapabilities_cb _hidl_cb) override;
+#endif
 
   // QClient methods
   virtual android::status_t notifyCallback(uint32_t command, const android::Parcel *input_parcel,

sdm/libs/hwc2/hwc_session_services.cpp

@@ -633,4 +633,34 @@ Return<int32_t> HWCSession::controlIdlePowerCollapse(bool enable, bool synchrono
 }
 #endif  // DISPLAY_CONFIG_1_3
 
+
+int32_t HWCSession::IsWbUbwcSupported(int *value) {
+  HWDisplaysInfo hw_displays_info = {};
+  DisplayError error = core_intf_->GetDisplaysStatus(&hw_displays_info);
+  if (error != kErrorNone) {
+    return -EINVAL;
+  }
+
+  for (auto &iter : hw_displays_info) {
+    auto &info = iter.second;
+    if (info.display_type == kVirtual && info.is_wb_ubwc_supported) {
+      *value = 1;
+    }
+  }
+
+  return error;
+}
+
+#ifdef DISPLAY_CONFIG_1_4
+Return<void> HWCSession::getWriteBackCapabilities(getWriteBackCapabilities_cb _hidl_cb) {
+  int value = 0;
+  IDisplayConfig::WriteBackCapabilities wb_caps = {};
+  int32_t error = IsWbUbwcSupported(&value);
+  wb_caps.isWbUbwcSupported = value;
+  _hidl_cb(error, wb_caps);
+
+  return Void();
+}
+#endif  // DISPLAY_CONFIG_1_4
+
 }  // namespace sdm