[PATCH 2/2] arm64: dts: amlogic: add Xiaomi Mi Box 4 support

[neil.armstrong at linaro.org]

On 9/3/26 09:49, Raspberry Kan wrote:
> First of all, I checked the device tree extracted from the stock firmware, and it explicitly describes a third pixel processor (|pp2|).
> 
> The original vendor DTS can be found here:
> https://github.com/Raspberry-Monster/MiBox4-LibreELEC/blob/misc/mibox4_gxl_tf_2g.dts#L10
> 
> It specifies three pixel processors and includes interrupts for |IRQPP2| and |IRQPPMMU2|.
> 
> I also verified this on the actual Xiaomi Mi Box 4 hardware. Lima successfully detects three pixel processors:
> 
> |lima d00c0000.gpu: pp0 - mali450 version major 0 minor 0 lima d00c0000.gpu: pp1 - mali450 version major 0 minor 0 lima d00c0000.gpu: pp2 - mali450 version major 0 minor 0 |
> 
> The corresponding |pp2| and |ppmmu2| interrupts are also registered:
> 
> |GICv2 200 Level pp2 GICv2 201 Level ppmmu2 |
> 
> The driver then initializes successfully:
> 
> |[drm] Initialized lima 1.1.0 for d00c0000.gpu on minor 1 |
> 
> So this particular S905L-based Mi Box 4 appears to use a Mali-450 MP3 configuration rather than MP2. I have not observed any initialization timeouts, reset errors, or SError failures with the third PP enabled.
> 
> As Neil mentioned above, the Mali GPU is already defined in |meson-gx-mali450.dtsi|, so this redundant definition will be removed in v2.
> 
> Thanks for the review.
> 

Sashiko is right, is it _really_ a GXLX you're running ? The S905L/GXLX does not have the PP2

could you dump the soc info ?

run:
grep ^ /sys/bus/soc/devices/soc*/*

on the device running mainline linux.

Neil