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這期內(nèi)容當(dāng)中小編將會(huì)給大家?guī)碛嘘P(guān)RK3288如何增加雙屏異顯 eDP+LVDS,文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
CPU:RK3288
系統(tǒng):Android 5.1
下面是官方文檔中的信息。
1、rk3288 支持的顯示接口可以任意組合。
2、雙屏異顯時(shí),一個(gè)顯示接口當(dāng)主屏,另一個(gè)當(dāng)副屏;主副屏由板級(jí) dts 文件確定,啟動(dòng)后無法動(dòng)態(tài)更改。
3、當(dāng)兩路顯示接口顯示不同分辨率時(shí),rk3288 只能為一路顯示接口提供精確時(shí)鐘,另一路顯示接口時(shí)鐘會(huì)有微小頻偏。
瑞芯微雖然提供了 Android 5.1 的補(bǔ)丁,但是本人在移植過程中出現(xiàn)一些問題(打補(bǔ)丁最好一行行核對(duì),不要圖方便直接使用指令)。
設(shè)備 eDP 為主屏,lvds 為副屏。
(1)首先修改兩個(gè)屏參文件 lcd-xxx.dtsi。
eDP 屏參文件補(bǔ)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 屏參文件補(bǔ)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)根據(jù)官方提供,打上 kernel 補(bǔ)丁
kernel 補(bǔ)丁
(3)根據(jù)官方提供,打上 hardware 補(bǔ)丁
hardware 補(bǔ)丁
(4)根據(jù)官方提供,打上 framework 補(bǔ)丁
framework 補(bǔ)丁
(5)官方提供的補(bǔ)丁打完了,但是此時(shí)編譯可能會(huì)報(bào)錯(cuò),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)) ####
根據(jù)編譯錯(cuò)誤提示,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)此時(shí)可以編譯成功,在屏參正確的前提下,主屏顯示正常,副屏出現(xiàn)花屏,需要在 system.prop 里添加屬性 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
此時(shí)大功告成,雙屏可以正常顯示,也可以實(shí)現(xiàn)雙屏異顯。
如果 lcd 出現(xiàn)重復(fù)性黑屏亮屏,找到對(duì)應(yīng)的屏參文件,在正常范圍內(nèi)調(diào)節(jié)頻率 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>;
// 調(diào)節(jié) lcd 頻率
clock-frequency = <148500000>;
hactive = <1920>;
vactive = <1080>;
如果單屏調(diào)試都正常點(diǎn)亮,打補(bǔ)丁后,點(diǎn)不亮或者有花屏現(xiàn)象,嘗試增大對(duì)應(yīng)屏的電源使能延時(shí)
lcd_en {
rockchip,power_type = <GPIO>;
gpios = <&gpio7 GPIO_A5 GPIO_ACTIVE_HIGH>;
- rockchip,delay = <10>;
+ rockchip,delay = <100>;
};
上述就是小編為大家分享的RK3288如何增加雙屏異顯 eDP+LVDS了,如果剛好有類似的疑惑,不妨參照上述分析進(jìn)行理解。如果想知道更多相關(guān)知識(shí),歡迎關(guān)注億速云行業(yè)資訊頻道。
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