Open source GLES1/2 driver for Vivante GPU hardware.
This is being maintained as a set of patches on top of the Mesa main repository. Expect frequent rebases while in this phase of development.
To be written.
My configure script for cubox:
#!/bin/bash
DIR=... # path to target headers and libraries
ETNAVIV_BASE="${HOME}/projects/etna_viv"
ETNAVIV_LIB="${ETNAVIV_BASE}/native/etnaviv"
ETNAVIV_INC="${ETNAVIV_BASE}/native"
export TARGET="arm-linux-gnueabihf"
export CFLAGS="-I${DIR}/cubox/include -I${ETNAVIV_INC}"
export CXXFLAGS="-I${DIR}/cubox/include -I${ETNAVIV_INC}"
export LDFLAGS="-L${DIR}/cubox/lib -L${ETNAVIV_LIB}"
export LIBDRM_LIBS="-L${DIR}/cubox/lib -ldrm"
export ETNA_LIBS="-letnaviv" # important!
export LIBTOOL_FOR_BUILD="/usr/bin/libtool" # important!
./configure --target=${TARGET} --host=${TARGET} \
--enable-gles2 --enable-gles1 --disable-glx --enable-egl --enable-dri \
--with-gallium-drivers=swrast,etna --with-egl-platforms=fbdev \
--enable-gallium-egl --enable-debug --with-dri-drivers=- The etna gallium driver uses
libetnaviv.aand its headers from theetna_vivproject (https://github.com/laanwj/etna_viv) for low-level access and register descriptions.
- libexpat and libdrm need to be available on the target (neither is used at the moment, but they are dependencies for Mesa). In many cases these can be copied from the device, after installing the appropriate development package.
I use this script to set up the framebuffer console for (double or single buffered) rendering, as well as prevent blanking and avoid screen corruption by hiding the cursor.
#!/bin/bash
# Set to usable resolution (double buffered)
fbset 1280x1024-60 -vyres 2048 -depth 32
# Set to usable resolution (single buffered)
#fbset 1280x1024-60 -vyres 1024 -depth 32
# Disable automatic blanking
echo -e '\033[9;0]' > /dev/tty1
echo 0 > /sys/class/graphics/fb0/blank
# Disable blinking cursor
echo -e '\033[?17;0;0c' > /dev/tty1
Frequently it is useful to compare the rendering from etna to the software rasterizer;
this can be done with the environment variable EGL_FBDEV_DRIVER, i.e.
# Run with etna driver
export EGL_FBDEV_DRIVER=etna
(run EGL demo...)
# Run with software rasterizer
export EGL_FBDEV_DRIVER=swrast
(run EGL demo...)
This section lists some tests and demos that can be used to exercise the driver.
A few testcases that I made especially for this driver, based on the samples from the OpenGL ES 2.0 programming guide (http://www.opengles-book.com/) can be found here:
https://github.com/laanwj/mesatest_gles
Some of the Glmark2 demos already run with this driver, but this is a work in progress.
Need a special glmark2 with fbdev support, which can be got here:
https://code.launchpad.net/~laanwj/glmark2/fbdev
Fetch:
bzr branch lp:~laanwj/glmark2/fbdev
Build:
./waf configure --with-flavors=fbdev-glesv2 --data-path=${PWD}/data
./waf
Run:
cd build/src
./glmark2-es2 -b shading -s 1280x1024 --visual-config alpha=0
Support matrix (cubox, v2, gc600):
[Scene] build -> renders
[Scene] shading -> renders
[Scene] texture -> renders
[Scene] effect2d -> renders
[Scene] bump -> renders
Corrupted:
[Scene] shadow -> rendering corrupted about every 1/2 frames
Shader assertion:
[Scene] refract -> missing instruction CMP
[Scene] jellyfish -> missing instruction SIN
[Scene] ideas -> missing instruction KILP
[Scene] loop -> missing loops support
[Scene] buffer -> missing instruction CMP
[Scene] terrain -> missing instruction CMP
Shows nothing:
[Scene] clear -> shows nothing (is it supposed to?)
[Scene] conditionals -> shows nothing
[Scene] function -> shows nothing
[Scene] pulsar -> shows nothing
Crashes GPU:
[Scene] desktop -> crashes GPU