Last Friday I got kmscube successfully running with mesa and the new etnaviv DRM kernel driver. At this time I got it not really pixel perfect and I spend some nights to get it fixed. It turns out that I need a small mesa hack to get the rendering correct. You may ask why did it so long to get it working? Let me explain it to you. The Vivnate GPU is a so called render-only GPU which does not have any kind of scanout logic in it....
Sometimes is is quite handy to have access to a JTAG interface to look more deeply into problems. The weapon of choice is an Olimex ARM-USB-OCD-H JTAG in combination with OpenOCD 0.8.0. First we will need to install OpenOCD. apt-get install libftdi-dev Download and extract OpenOCD 0.8.0 run ./configure run make && make install This should give you an OpenOCD installation with the following configuration: OpenOCD configuration summary ————————————————– MPSSE mode of FTDI based devices yes (auto) ST-Link JTAG Programmer yes (auto) TI ICDI JTAG Programmer yes (auto) Keil ULINK JTAG Programmer yes (auto) Altera USB-Blaster II Compatible yes (auto) Segger J-Link JTAG Programmer yes (auto) OSBDM (JTAG only) Programmer yes (auto) eStick/opendous JTAG Programmer yes (auto) Andes JTAG Programmer yes (auto) Versaloon-Link JTAG Programmer yes (auto) USBProg JTAG Programmer yes (auto) Raisonance RLink JTAG Programmer yes (auto) Olimex ARM-JTAG-EW Programmer yes (auto) CMSIS-DAP Compliant Debugger no...
I did spend some time to find the cause for the rendering issues during running some egls2 demos. The fix is a simple one-liner and I would say that GC8xx and GC2000 are ‘equal’ now. That means general work on etnaviv can start now. Currently I am looking in different problem zones and where to start. Update mesa fork Start working on an improved compiler Start working on an kernel interface I think that Rob will start soon on the kernel interface and the mesa update should be doable during some hours....