rk3288 开机动态切换lvds屏幕显示（三）主副屏幕设置

 设置主副屏幕显示

修改主副屏幕配置属性

device/rockchip/rk3288/system.prop

-sys.hwc.device.primary=LVDS
-sys.hwc.device.extend=HDMI-A,eDP
+persist.hwc.device.primary=LVDS
+persist.hwc.device.extend=HDMI-A,eDP

frameworks/base/services/core/jni/com_android_server_rkdisplay_RkDisplayModes.cpp

@@ -118,7 +118,7 @@ static void updateConnectors(){
         }
         ALOGD("crtc: %d %d foundHdmi %d", crtcId1, crtcId2, foundHdmi);
         char property[PROPERTY_VALUE_MAX];
-        property_get("sys.hwc.device.primary", property, "null");
+        property_get("persist.hwc.device.primary", property, "null");
         if (crtcId1 == crtcId2 && foundHdmi && strstr(property, "HDMI-A") == NULL) {
             for (auto &conn : drm_->connectors()) {
                 if (builtInHdmi(conn->get_type()) && conn->state() == DRM_MODE_CONNECTED) {
@@ -365,7 +365,7 @@ static void saveHwcInitalInfo(struct file_base_paramer *base_paramer, int dpy){
         base_paramer->main.hwc_info.framebuffer_height = 1080;
         base_paramer->main.hwc_info.fps = 60.00;
         memset(property,0,sizeof(property));
-        len = property_get("sys.hwc.device.primary", property, NULL);
+        len = property_get("persist.hwc.device.primary", property, NULL);
         if (len) {
             memcpy(base_paramer->main.hwc_info.device, property, strlen(property));
         } else {
@@ -378,7 +378,7 @@ static void saveHwcInitalInfo(struct file_base_paramer *base_paramer, int dpy){
         base_paramer->aux.hwc_info.framebuffer_height = 1080;
         base_paramer->aux.hwc_info.fps = 60.00;
         memset(property,0,sizeof(property));
-        len = property_get("sys.hwc.device.extend", property, NULL);
+        len = property_get("persist.hwc.device.extend", property, NULL);
         if (len)
             memcpy(base_paramer->aux.hwc_info.device, property, strlen(property));
         else

frameworks/base/services/core/jni/rkdisplay/drmresources.cpp

-  primary_length = property_get("sys.hwc.device.primary", primary_name, NULL);
-  extend_length = property_get("sys.hwc.device.extend", extend_name, NULL);
+  primary_length = property_get("persist.hwc.device.primary", primary_name, NULL);
+  extend_length = property_get("persist.hwc.device.extend", extend_name, NULL);

hardware/rockchip/hwcomposer/drmresources.cpp

-  primary_length = property_get("sys.hwc.device.primary", primary_name, NULL);
-  extend_length = property_get("sys.hwc.device.extend", extend_name, NULL);
+  primary_length = property_get("persist.hwc.device.primary", primary_name, NULL);
+  extend_length = property_get("persist.hwc.device.extend", extend_name, NULL);

关于主副屏幕切换问题已在第一篇的服务中介绍，在U盘rk_lcd_screen文件中添加

        primary=LVDS（主屏幕显示）

        extend=HDMI-A（副屏幕显示）

服务会将设置的屏幕添加到系统属性中。