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ssvb / xf86-video-fbturbo

Xorg DDX driver for ARM devices (Allwinner, RPi and others)
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G2D/Mixer #48

Open magicse opened 8 years ago

magicse commented 8 years ago

I cant found anything about G2D/Mixer on Allwinner H3 G2D driver used SUNXI_MP_PBASE and SUNXI_IRQ_MP, but irqs-sun8iw7p1.h and platform-sun8iw7p1.h didn't have anything like that.

ssvb commented 8 years ago

It's very likely that H3 does not have the G2D/Mixer hardware block anymore. For example, A13 did not have it either.

magicse commented 8 years ago

But in datasheet on H3 I found something about RT-MIXER0 RT-MIXER1 in display engine.

ssvb commented 8 years ago

The references to "mixer" look like something that might be probably related to audio handling in H3.

You can check the A10 manual to find the documentation about the G2D/Mixer that is used for 2D graphics.

magicse commented 8 years ago

untitled-2

ssvb commented 8 years ago

OK, if the picture is correct, then maybe it does have G2D. Do the kernel sources from the Allwinner's H3 SDK have anything interesting?

magicse commented 8 years ago

display engine 2.0 realtime mixer processing base functions implement de_rtmx.h de_rtmx_type.h de_rtmx.c

ssvb commented 8 years ago

OK, got an Orange Pi PC board myself and also took a look at the SDK sources. These RT-Mixer and MUX things seem to be used instead of the DEBE and DEFE in older Allwinner chips. As for G2D, it is enabled with the following kernel option:

config SUNXI_G2D
    depends on (ARCH_SUN8IW1P1 || ARCH_SUN9IW1P1)
    tristate "sunxi g2d driver"
    default N
    select ION
    select ION_SUNXI
    help

Which means A31 or A80, but not H3.