420b7913d4
2820ab0b51 Merge pull request #1076 from KhronosGroup/bitcast-pre-330-glsl 63bcbd511e GLSL: Need extension to use bitcast on GLSL < 330. 9f3bebe3d0 Merge pull request #1075 from lifpan/master b11c20fc1d Remove unreasonable assertion for OpTypeImage Sampled parameter. 1a592b7c0f Merge pull request #1067 from cdavis5e/msl-scalar-block-layout 28454facbb MSL: Handle packed matrices. ea5c0ed82f MSL: Fix alignment of packed types. 44f688bf0b Merge pull request #1070 from KhronosGroup/fix-1066 25c74b324e Forget loop variable enables after emitting block chain. 6b010e0cbc Merge pull request #1069 from KhronosGroup/fix-1053 f6f849397e MSL: Re-roll array expressions in initializers. e5fa7edfd6 MSL: Support scalar block layout. git-subtree-dir: deps/SPIRV-Cross git-subtree-split: 2820ab0b51bf5e4187435d904b34e762b988f48b
3.3 KiB
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 uncomment 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:
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
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.