Re: [PATCH v2 2/6] clk: mediatek: clk-mt8188-topckgen: Remove univpll from parents of mfg_core_tmp

[Stephen Boyd <sboyd@kernel.org>]

Quoting Pablo Sun (2024-09-27 03:30:01)
> Same as MT8195, MT8188 GPU clock is primarly supplied by the dedicated
> mfgpll. The clock "mfg_core_tmp" is only used as an alt clock when
> setting mfgpll clock rate.
> 
> If we keep the univpll parents from mfg_core_tmp, when setting
> GPU frequency to 390000000, the common clock framework would switch
> the parent to univpll, instead of setting mfgpll to 390000000:
> 
>     mfgpll                            0        0        0   949999756
>     univpll                           2        2        0  2340000000
>        univpll_d6                     1        1        0   390000000
>           top_mfg_core_tmp            1        1        0   390000000
>              mfg_ck_fast_ref          1        1        0   390000000
>                 mfgcfg_bg3d           1        1        0   390000000
> 
> This results in failures when subsequent devfreq operations need to
> switch to other frequencies. So remove univpll from the parent list.
> 
> This solution is taken from commit 72d38ed720e9 ("clk: mediatek:
> clk-mt8195-topckgen: Drop univplls from mfg mux parents")
> 
> Signed-off-by: Pablo Sun <pablo.sun@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---

Applied to clk-next