mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-24 16:39:43 +00:00
89 lines
3.3 KiB
Markdown
89 lines
3.3 KiB
Markdown
USAGE NOTES
|
|
===========
|
|
|
|
This driver is meant for devices with Allwinner SoCs with Mali400 3D block and a
|
|
good fbdev implementation. It is derived from the old Android GLES driver.
|
|
|
|
It was meant to be used on Cubieboard/Cubieboard2/Cubietruck, but it should not
|
|
be used on an Odroid X2/U2/U3 where a superior solution (RetroArch exynos video driver) is available.
|
|
Fbdev implementation on Odroid harware is missing WAITFORVSYNC ioctl, so use Exynos driver there.
|
|
|
|
This driver requires MALI r4p0 binary blobs for fbdev, and a kernel compatible with r4p0 binaries.
|
|
|
|
So we will use
|
|
-This kernel : https://github.com/mireq/linux-sunxi
|
|
-This small patch : https://gist.github.com/ssvb/8088519
|
|
-Files in this thread : http://forum.odroid.com/viewtopic.php?f=52&t=4956
|
|
|
|
First we will clone and build the kernel:
|
|
git clone https://github.com/mireq/linux-sunxi.git -b sunxi-3.4 --depth 1
|
|
|
|
Now we edit drivers/video/sunxi/disp/dev_fb.c, and uncoment the line 1074:
|
|
// Fb_wait_for_vsync(info);
|
|
|
|
It is assumed you have a cross-compiler installed, so we configure and build the kernel and modules:
|
|
|
|
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- sun7i_defconfig
|
|
|
|
(This is for Cubieboard2, for other Sunxi boards look here: http://linux-sunxi.org/Linux_Kernel#Compilation)
|
|
|
|
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
|
|
|
|
(Just in case we want to customize kernel options. It is OK to build with default config)
|
|
|
|
make -j4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage modules
|
|
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=<path_to_rootfs_mountpoint> modules_install
|
|
|
|
cp arch/arm/boot/uImage /<path_to_sd_rootfs_mountpoint>/boot/
|
|
|
|
Now we should download and extract the EGL/GLES/GLES2 MALI FBDEV blobs from this thread:
|
|
|
|
http://forum.odroid.com/viewtopic.php?f=52&t=4956
|
|
|
|
This is the exact link:
|
|
|
|
http://builder.mdrjr.net/tools/r4p0-mp400-fbdev.tar
|
|
|
|
Copy these libraries to /usr/lib.
|
|
|
|
Now we need the headers. We can get them from here:
|
|
|
|
http://malideveloper.arm.com/develop-for-mali/sdks/opengl-es-sdk-for-linux/#opengl-es-sdk-for-linux-download
|
|
|
|
Download whatever version you want. We just get the headers from here, not machine-dependant compiled code.
|
|
|
|
Extract the files and copy the directories inside inc to /usr/include .
|
|
|
|
Also, copy simple_framework/inc/mali/EGL/fbdev_window.h to /usr/include/EGL .
|
|
|
|
In the end you should have this on your system:
|
|
|
|
/usr/include/EGL/
|
|
eglext.h
|
|
egl.h
|
|
eglplatform.h
|
|
fbdev_window.h
|
|
/usr/include/GLES/
|
|
glext.h
|
|
gl.h
|
|
glplatform.h
|
|
/usr/include/GLES2
|
|
gl2ext.h
|
|
gl2.h
|
|
gl2platform.h
|
|
/usr/include/GLES3
|
|
gl3ext.h
|
|
gl3.h
|
|
gl3platform.h
|
|
|
|
To enable mali_fbdev you must configure RetroArch with --enable-gles and --enable-mali_fbdev.
|
|
|
|
This is an example of what you would use on a CubieBoard2 for a lightweight RetroArch:
|
|
|
|
./configure --enable-gles --enable-mali_fbdev --disable-x11 --disable-sdl2 --enable-floathard --disable-ffmpeg --disable-netplay --enable-udev --disable-sdl --disable-pulse --disable-oss --disable-freetype --disable-7zip --disable-libxml2
|
|
|
|
NOTE: A TTY hack is used to auto-clean the console on exit, and the fbdev ioctls are used to retrieve
|
|
current video mode. Both things work good, but they are not exactly ideal solutions.
|
|
|
|
If you come up with something better, feel free to improve the driver.
|