日志
RK3288 增加双屏异显 eDP+LVDS
热度 1 ||
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 --git
a/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi
b/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi
index
3862b05..7bf992f 100755
--- a/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi
+++
b/kernel/arch/arm/boot/dts/lcd-NV116FH1.dtsi
@@ -3,11 +3,9 @@
*
*/
-/ {
-
- disp_timings: display-timings {
- native-mode =
<&timing0>;
- timing0: timing0 {
+ display-timings {
+ native-mode =
<&nv116fhm>;
+ nv116fhm: timing0 {
screen-type =
<SCREEN_EDP>;
out-face = <OUT_P666>;
clock-frequency = <205000000>;
@@ -30,4 +30,3 @@
swap-gb = <0>;
};
};
-};
lvds 屏参文件补丁
diff --git
a/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsi
b/kernel/arch/arm/boot/dts/lcd-ZJ080NA-08A.dtsi
old mode 100644
new mode 100755
index
fc6385c..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 =
<SCREEN_DUAL_LVDS>;
lvds-format =
<LVDS_8BIT_1>;
out-face = <OUT_P888>;
@@ -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 method
moveExtendDisplay() in Window
public class MockWindow
extends Window {
^
Note: Some input
files use or override a deprecated API.
Note: Recompile
with -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 input
files use or override a deprecated API.
Note: Recompile
with -Xlint:deprecation for details.
Note: Some input
files use unchecked or unsafe operations.
Note: Recompile
with -Xlint:unchecked for details.
Note: Some input
files use or override a deprecated API.
Note: Recompile
with -Xlint:deprecation for details.
Note: Some input
files use unchecked or unsafe operations.
Note: Recompile
with -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 failed
to 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 --git
a/cts/tests/tests/view/src/android/view/cts/WindowTest.java
b/cts/tests/tests/view/src/android/view/cts/WindowTest.java
index
3c5386d..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 WindowTest
extends ActivityInstrumentationTestCase2<WindowCtsActivi
}
@Override
+ public void moveAppToDisplay(int id) {
+ }
+
+ @Override
+ public void syncDualDisplay()
{
+ }
+
+ @Override
+ public void
moveExtendDisplay() {
+ }
+
+
+ @Override
public void
setDefaultWindowFormat(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 --git
a/device/rockchip/rk3288/system.prop b/device/rockchip/rk3288/system.prop
index
26a2b09..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
#NFC
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 =
<SCREEN_DUAL_LVDS>;
lvds-format =
<LVDS_8BIT_1>;
out-face = <OUT_P888>;
color-mode = <COLOR_RGB>;
// 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 = <GPIO>;
gpios = <&gpio7 GPIO_A5
GPIO_ACTIVE_HIGH>;
- rockchip,delay = <10>;
+ rockchip,delay = <100>;
};
