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TinkerBoard / android-7.1.2_kernel

Android Kernel source for Tinker Board
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RPi Display resolution #12

Closed sobrinho closed 5 years ago

sobrinho commented 5 years ago

Hi there!

RPi Display claims to be 800x480 240dpi but looking into wm size, I'm seeing 1280x720.

rk3288:/mnt/sdcard/Download # wm size
Physical size: 1280x720
rk3288:/mnt/sdcard/Download # wm density
Physical density: 240

Changing to 800x480 improves the quality of the graphics but bugs the 1) android boot image 2) the soft keys (volume controls disappear, probably because they don't fit).

1280x720 img_4761 img_4762

800x480 img_4763 img_4764

sunk818 commented 5 years ago

I remember with ODroid, there were some chipset limitations on display resolutions supported. I wonder if this is the same situation for TinkerBoard. I was able to display on a 1680x1050, but the bottom was chopped off for me. Maybe closest resolution supported is not something desktop monitors support. I'm surprised a tablet sized resolution isn't perfect. We got so many display resolutions compared to Apple hardware, it is a difficult beast to deal with.

jamess-huang commented 5 years ago

Dear, sobrinho We set this value in the framework, you can modify the framework to have a try. Please reference the below link https://bitbucket.org/TinkerBoard_Android/frameworks-native/commits/eda525e24e34def17ed722d3d21bf12100eac980?at=sbc/tinkerboard/asus/Android-7.1.2 If you want to change the frame buffer size, you can modify the property value to 800x480 at line 193 in frameworks/native/services/surfaceflinger/SurfaceFlinger.cpp and also line 241 in frameworks/native/services/surfaceflinger/SurfaceFlinger_hwc1.cpp

sobrinho commented 5 years ago

I'm able to set the desired resolution but then the Android is a bit odd, probably because it is too small.

I was just wondering if this was intentional or what.

sobrinho commented 5 years ago

@jamess-huang gotcha! Saw your comment after published mine.

Since RPi display is 800x480, does it make sense to be that resolution by default?

jamess-huang commented 5 years ago

Did it work to change the frame buffer size to 800x480 on your side ? To change the frame buffer size to 720p is in order to have a more beautiful display content. But if there will be any side effect, we can change it back.

sobrinho commented 5 years ago

It worked, although the resolution is a bit weird, using 800x480 it displays perfectly on the display but seems like everything is too big for the screen.

Although, since I can change on my side, that's fine.

Closing, thanks again!

jamess-huang commented 5 years ago

Maybe you can adjust the option which located at "settings --> Developer options --> Smallest width"