[PATCH 2/2] clk: mediatek: mt6795: fix the FHCTL DDS mask width

[AngeloGioacchino Del Regno]

On 9/12/26 08:40, Ryan Brue wrote:
> All eight PLLs in mt6795's pllfhs[] have pcwbits = 21, so the FHCTL DDS
> field is bits 20:0, but _FH() declares .dds_mask = GENMASK(21, 0). As on
> MT8173, new_dds from mtk_pll_calc_values() is always 21-bit, so admitting
> bit 21 of FHCTL_MON into the poll in hopping_hw_flow() can only make it
> time out. The same mask feeds the CON1 write-back and fhctl_set_ssc_regs().
> 
> Unlike MT8173 this path has a user: mt6795-sony-xperia-m5.dts switches
> FHCTL on for mainpll, mpll and msdcpll, with SSC.
> 
> Found by inspection while fixing MT8173. I have no MT6795 hardware, so
> this one is untested.
> 
> Fixes: f222a1baec5f ("clk: mediatek: mt6795: Add support for frequency hopping through FHCTL")
> Assisted-by: LLM
> Signed-off-by: Ryan Brue <ryanbrue.dev at gmail.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>