Post Last Edited by Fab at 2014-9-7 20:19 |
Hi nnn2. I am still struggling with the HDMI audio in Arch. How did you fix that? I tried to pass to the kernel the argument disp.hdmi_audio=1, but it did not help. Thanks
On a separate note, at the link below, it talks about specialised mali driver for A20. The repo seems to be quite old, and not maintained since 2013. I wonder if anybody looked into this.
Advanced topic: Using more recent Mali drivers
The Mali-400MP2 used in the A20 chip has two pixel processor cores, as opposed only one in the A10's Mali-400. The standard Mali driver (r3p0) does not utilize the second pixel processor, while a more recent one (3p2) does. The r3p2 version of the Mali driver also seems to have other performance benefits. To use the r3p2 mali driver, a few steps have to be taken:
- A kernel with the r3p2 Mali kernel driver must be used. An example is ssvb's 20130913-mali-r3p2-01rel2 branch of linux-sunxi (https://github.com/ssvb/linux-sunxi.git). Note that this kernel does not include G2D (bitblt) acceleration, but that is generally not a critical performance issue with the A20.
- The userspace mali drivers must be updated to r3p2. This is automatically handled by the mali drivers at https://github.com/linux-sunxi/sunxi-mali.git after updating the submodules.
- The mali-r3p2-support branch of the xf86-video-fbturbo xorg driver must be installed.