[Bug 91697] [SKL, BIOS upgrade regression] distorted display after resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91697

--- Comment #16 from Damien Lespiau <damien.lespiau at gmail.com> ---
As an early review:

Your patch makes the code still go through skl_dpll0_enable() when PLL0 is on
after resume, which touches the CDCLK and DPLL0 registers. It sort of work
because the PLL is already locked and the writes ignored but doesn't feel
totally satisfactory.

Could you skip skl_dpll0_enable() if DPLL0 is already enabled?

Thanks,

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