libhwc2.1: Add HistogramController class am: 573d3753c8 am: d437e2c90e

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/zuma/+/23655883

Change-Id: I57f5dd87185a11d93bef396e96da8b214c299dbe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

3 files changed, 88 insertions, 1 deletions

diff --git a/libhwc2.1/Android.mk b/libhwc2.1/Android.mk
index a6b6fba..c704838 100644
--- a/libhwc2.1/Android.mk
+++ b/libhwc2.1/Android.mk
@@ -28,7 +28,8 @@ LOCAL_SRC_FILES += \
 	../../gs201/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterfaceModule.cpp \
 	../../zuma/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterfaceModule.cpp \
 	../../zuma/libhwc2.1/libcolormanager/DisplayColorModule.cpp \
-	../../zuma/libhwc2.1/libdevice/ExynosDeviceModule.cpp
+	../../zuma/libhwc2.1/libdevice/ExynosDeviceModule.cpp \
+	../../zuma/libhwc2.1/libdevice/HistogramController.cpp
 
 LOCAL_CFLAGS += -DDISPLAY_COLOR_LIB=\"libdisplaycolor.so\"
 
diff --git a/libhwc2.1/libdevice/HistogramController.cpp b/libhwc2.1/libdevice/HistogramController.cpp
new file mode 100644
index 0000000..30b0d5d
--- /dev/null
+++ b/libhwc2.1/libdevice/HistogramController.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "HistogramController.h"
+
+// TODO: b/295990513 - Remove the if defined after kernel prebuilts are merged.
+#if defined(EXYNOS_HISTOGRAM_CHANNEL_REQUEST)
+int HistogramController::createHistogramDrmConfigLocked(const ChannelInfo &channel,
+                                                        std::shared_ptr<void> &configPtr,
+                                                        size_t &length) const {
+    configPtr = std::make_shared<struct histogram_channel_config>();
+    struct histogram_channel_config *channelConfig =
+            (struct histogram_channel_config *)configPtr.get();
+
+    if (channelConfig == nullptr) {
+        ALOGE("%s: histogram failed to allocate histogram_channel_config", __func__);
+        return NO_MEMORY;
+    }
+
+    channelConfig->roi.start_x = channel.workingConfig.roi.left;
+    channelConfig->roi.start_y = channel.workingConfig.roi.top;
+    channelConfig->roi.hsize = channel.workingConfig.roi.right - channel.workingConfig.roi.left;
+    channelConfig->roi.vsize = channel.workingConfig.roi.bottom - channel.workingConfig.roi.top;
+    channelConfig->weights.weight_r = channel.workingConfig.weights.weightR;
+    channelConfig->weights.weight_g = channel.workingConfig.weights.weightG;
+    channelConfig->weights.weight_b = channel.workingConfig.weights.weightB;
+    channelConfig->pos = (channel.workingConfig.samplePos == HistogramSamplePos::POST_POSTPROC)
+            ? POST_DQE
+            : PRE_DQE;
+    channelConfig->threshold = channel.threshold;
+    length = sizeof(struct histogram_channel_config);
+
+    return NO_ERROR;
+}
+
+int HistogramController::parseDrmEvent(void *event, uint8_t &channelId, char16_t *&buffer) const {
+    struct exynos_drm_histogram_channel_event *histogram_channel_event =
+            (struct exynos_drm_histogram_channel_event *)event;
+    channelId = histogram_channel_event->hist_id;
+    buffer = (char16_t *)&histogram_channel_event->bins;
+    return NO_ERROR;
+}
+#endif
diff --git a/libhwc2.1/libdevice/HistogramController.h b/libhwc2.1/libdevice/HistogramController.h
new file mode 100644
index 0000000..0cfee0e
--- /dev/null
+++ b/libhwc2.1/libdevice/HistogramController.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "HistogramDevice.h"
+
+class HistogramController : public HistogramDevice {
+public:
+    HistogramController(ExynosDisplay *display) : HistogramDevice(display, 4, {3}) {}
+// TODO: b/295990513 - Remove the if defined after kernel prebuilts are merged.
+#if defined(EXYNOS_HISTOGRAM_CHANNEL_REQUEST)
+    virtual int createHistogramDrmConfigLocked(const ChannelInfo &channel,
+                                               std::shared_ptr<void> &configPtr,
+                                               size_t &length) const override
+            REQUIRES(channel.channelInfoMutex);
+    virtual int parseDrmEvent(void *event, uint8_t &channelId, char16_t *&buffer) const override;
+#endif
+};