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

On Sun, May 10, 2026 at 01:14:02PM +0300, Erikas Bitovtas wrote:
> 
> >>> 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

This is correct according to my knowledge.

> 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

-- 
With best wishes
Dmitry