hwc2: Enable HBM based on HDR layer coverage

Enable high brightness mode when the largest HDR layer covers >50% of
the screen. Use hardware.google.light@1.0 interface.

Bug: 109762428
Change-Id: Ib5830e5f02d380824116d1f3ed7ad0727fca9385

1 files changed, 27 insertions, 0 deletions

diff --git a/sdm/libs/hwc2/hwc_display_primary.cpp b/sdm/libs/hwc2/hwc_display_primary.cpp
index f86fbe1d..31258ecf 100644
--- a/sdm/libs/hwc2/hwc_display_primary.cpp
+++ b/sdm/libs/hwc2/hwc_display_primary.cpp
@@ -251,6 +251,33 @@ HWC2::Error HWCDisplayPrimary::Present(int32_t *out_retire_fence) {
     }
   }
 
+  if (CC_UNLIKELY(!has_init_light_server_)) {
+    using ILight = ::hardware::google::light::V1_0::ILight;
+    vendor_ILight_ = ILight::getService();
+    if (vendor_ILight_ != nullptr) {
+      vendor_ILight_->setHbm(false);
+    } else {
+      DLOGE("failed to get vendor light service");
+    }
+
+    uint32_t panel_x, panel_y;
+    GetPanelResolution(&panel_x, &panel_y);
+    hbm_threshold_px_ = float(panel_x * panel_y) * hbm_threshold_pct_;
+    DLOGI("Configure hbm_threshold_px_ to %f", hbm_threshold_px_);
+
+    has_init_light_server_ = true;
+  }
+
+  const bool enable_hbm(hdr_largest_layer_px_ > hbm_threshold_px_);
+  if (high_brightness_mode_ != enable_hbm && vendor_ILight_ != nullptr) {
+    using ::android::hardware::light::V2_0::Status;
+    if (Status::SUCCESS == vendor_ILight_->setHbm(enable_hbm)) {
+      high_brightness_mode_ = enable_hbm;
+    } else {
+      DLOGE("failed to setHbm to %d", enable_hbm);
+    }
+  }
+
   CloseFd(&output_buffer_.acquire_fence_fd);
   pending_commit_ = false;
   return status;