Re: [PATCH v5 5/8] clk: qcom: gcc-msm8939: mark Venus core GDSCs as hardware controlled

[Erikas Bitovtas <xerikasxx@gmail.com>]

>>> Last time I tried to enable only 1 of the cores, the following would
>>> happen:
>> - If core0 is enabled, HEVC decoding would work, but not the other
>> codecs.
>> - If core1 is enabled, the rest of codecs would work, but not HEVC.
> 
> Can you be a little clearer here do you mean - doesn't work on that core
> or doesn't work on all cores ?
> 

By that I mean that when I tried to play an HEVC video with mpv with
only core0 enabled, it would play fine, but trying to play videos in
another codec would result in power collapse fails. Likewise with core1,
but in other codecs.

I assume this is how cores are split - core0 does HEVC decoding and
core1 does the rest of codecs. This is confirmed by downstream code as
well (although the cores are flipped - core0 is the rest of codecs
("legacy") and core1 is HEVC):
https://github.com/msm8916-mainline/linux-downstream/blob/b20608408caff817ec874f325127b07609fbaeb8/arch/arm/boot/dts/qcom/msm8939-common.dtsi#L1589
https://github.com/msm8916-mainline/linux-downstream/blob/b20608408caff817ec874f325127b07609fbaeb8/Documentation/devicetree/bindings/media/video/msm-vidc.txt#L35