julbouln / etnaviv_x15 Goto Github PK

It is an extraction of the latest etnaviv (https://github.com/etnaviv) drm driver version from mainline kernel to test the support of the Beagleboard X15 (am57x) integrated Vivante GC320 GPU.
- it is backported to 4.9.x kernel
- it can be used without kernel recompilation by modifying DTB
- armada X11 driver can be used to take advantage of the GPU (https://github.com/xobs/xserver-xorg-video-armada)

Modifying DTB in DTBs directory (/boot/dtbs):

Backup the current DTB:
# cp am57xx-beagle-x15.dtb am57xx-beagle-x15.dtb.BAK

Decompile DTB:
# dtc -I dtb -O dts am57xx-beagle-x15.dtb > am57xx-beagle-x15.dts

In am57xx-beagle-x15.dts, replace the bb2d entry (was "bb2d@59000000 {compatible = "ti,dra7-bb2d" ...") by:

 gpu_2d: bb2d@59000000 {
                        compatible = "ti,dra7-bb2d","vivante,gc";
                        reg = <0x59000000 0x700>;
						interrupts = <0x0 0x78 0x4>;
                        ti,hwmods = "bb2d";
                        clocks = <0xc2>;
                        clock-names = "fclk";
                        status = "okay";
                        linux,phandle = <0x1b0>;
                        phandle = <0x1b0>;
                };
And add:
  gpu-subsystem {
      compatible = "ti,dra7-gpu-subsystem";
      cores = <&gpu_2d>;
	};

Recompile DTS:
# dtc -O dtb -o am57xx-beagle-x15.dtb -b 0 am57xx-beagle-x15.dts

Reboot:
# reboot

Compiling the module:
# make -C /usr/src/$(YOUR_KERNEL_HEADERS)/ M=$PWD 
# insmod etnaviv.ko

At this point, the device should be recognised:
# dmesg
...
[11108.002439] etnaviv gpu-subsystem: bound 59000000.bb2d (ops gpu_ops [etnaviv])
[11108.002461] etnaviv-gpu 59000000.bb2d: model: GC320, revision: 5301

Installing armada X11 driver:
To be able to compile and use https://github.com/xobs/xserver-xorg-video-armada, you will need to install : 
- libdrm-armada (git://ftp.arm.linux.org.uk/~rmk/libdrm-armada.git/)
- galcore headers https://github.com/etnaviv/galcore_headers (cp -fr galcore_headers/tree/master/include_v4 /usr/local/include/HAL)
- libetnaviv https://github.com/etnaviv/libetnaviv