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CPU：RK3288 系统：Android 5.1 下面是官方文档中的信息。 1、rk3288 支持的显示接口可以任意组合。 2、双屏异显时，一个显示接口当主屏，另一个当副屏；主副屏由板级 dts 文件确定，启动后无法动态更改。 3、当两路显示接口显示不同分辨率时，rk3288 只能为一路显示接口提供精确时钟，另一路显示接口时钟会有微小频偏。 瑞芯微虽然提供了 Android 5.1 的补丁，但是本人在移植过程中出现一些问题（打补丁最好一行行核对，不要图方便直接使用指令）。 设备 eDP 为主屏，lvds 为副屏。 （1）首先修改两个屏参文件 lcd-xxx.dtsi。 eDP 屏参文件补丁 diff --gita/kernel/arch/ ARM/boot/dts/lcd-NV116FH1.dtsib/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi index3862b05..7bf992f 100755 --- a/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi +++b/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi * */ -/ { - - disp_ timings: display-timings { - native-mode =<&timing0>; - timing0: timing0 { + display-timings { + native-mode =<&nv116fhm>; + nv116fhm: timing0 { screen-type =; out-face = ; clock-frequency = <205000000>; @@ -30,4 +30,3 @@ swap-gb = <0>; }; }; -}; lvds 屏参文件补丁 diff --gita/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsib/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsi old mode 100644 new mode 100755 indexfc6385c..58f999be ---a/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsi +++b/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsi @@ -3,11 +3,10 @@ * */ -/ { - disp_timings: display-timings { - native-mode =<&timing0>; - timing0: timing0 { + display-timings { + native-mode =<&zj080na>; + zj080na: timing0 { screen-type =; lvds-format =; out-face = ; @@ -30,4 +30,3 @@ swap-gb = <0>; }; }; -}; （2）根据官方提供，打上 kernel 补丁 kernel 补丁 （3）根据官方提供，打上 hardware 补丁 hardware 补丁 （4）根据官方提供，打上 framework 补丁 framework 补丁 （5）官方提供的补丁打完了，但是此时编译可能会报错，如下： cts/tests/tests/view/src/android/view/cts/WindowTest.java:846: error: WindowTest.MockWindow is not abstract and does not override abstract methodmoveExtendDisplay() in Window public class MockWindowextends Window { ^ Note: Some inputfiles use or override a deprecated API. Note: Recompilewith -Xlint:deprecation for details. 1 error make: *** [out/target/common/obj/APPS/CtsViewTestCases_intermediates/classes-full-debug.jar]Error 41 make: *** Waiting for unfinished jobs.... Note: Some inputfiles use or override a deprecated API. Note: Recompilewith -Xlint:deprecation for details. Note: Some inputfiles use unchecked or unsafe operations. Note: Recompilewith -Xlint:unchecked for details. Note: Some inputfiles use or override a deprecated API. Note: Recompilewith -Xlint:deprecation for details. Note: Some inputfiles use unchecked or unsafe operations. Note: Recompilewith -Xlint:unchecked for details. Warning:AndroidManifest.xml already defines minSdkVersion (in http://schemas.android.com/apk/res/android);using existing value in manifest. Warning:AndroidManifest.xml already defines targetSdkVersion (in http://schemas.android.com/apk/res/android);using existing value in manifest. #### make failedto build some targets (03:55 (mm:ss)) #### 根据编译错误提示，需要修改cts/tests/tests/view/src/android/view/cts/WindowTest.java 文件。 diff --gita/cts/tests/tests/view/src/android/view/cts/WindowTest.javab/cts/tests/tests/view/src/android/view/cts/WindowTest.java index3c5386d..8732ae7 100755 ---a/cts/tests/tests/view/src/android/view/cts/WindowTest.java +++b/cts/tests/tests/view/src/android/view/cts/WindowTest.java @@ -998,6 +998,19 @@ public class WindowTestextends ActivityInstrumentationTestCase2 } @Override + public void moveAppToDisplay(int id) { + } + + @Override + public void syncDualDisplay(){ + } + + @Override + public voidmoveExtendDisplay() { + } + + + @Override public voidsetDefaultWindowFormat(int format) { super.setDefaultWindowFormat(format); } （6）此时可以编译成功，在屏参正确的前提下，主屏显示正常，副屏出现花屏，需要在 system.prop里添加属性 ro.htg.force=1。 diff --gita/device/rockchip/rk3288/system.prop b/device/rockchip/rk3288/system.prop index26a2b09..c4f2c3d 100755 ---a/device/rockchip/rk3288/system.prop +++b/device/rockchip/rk3288/system.prop @@ -12,6 +12,7 @@rild.libpath=/system/lib/libril-rk29-dataonly.so rild.libargs=-d /dev/ttyACM0 persist.tegra.nvmmlite = 1 ro.audio.monitorOrientation=true +ro.htg.force=1 debug.nfc.fw_download=false 此时大功告成，双屏可以正常显示，也可以实现双屏异显。 如果 lcd 出现重复性黑屏亮屏，找到对应的屏参文件，在正常范围内调节频率 clk 值即可。 display-timings { native-mode =<&ee101ia>; ee101ia: timing0 { screen-type =; lvds-format =; out-face = ; color-mode = ; // 调节 lcd 频率 clock-frequency = <148500000>; hactive = <1920>; vactive = <1080>; 如果单屏调试都正常点亮，打补丁后，点不亮或者有花屏现象，尝试增大对应屏的 电源使能延时 lcd_en { rockchip,power_type = ; gpios = <&gpio7 GPIO_A5GPIO_ACTIVE_HIGH>; - rockchip,delay = <10>; + rockchip,delay = <100>; };
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