[Freedreno] [PATCH] drm/msm/dsi: workaround for display enabled by bootloader

[Eric Anholt]

Rob Clark <robdclark at gmail.com> writes:

> Bootloader enabled display, when the driver is built-in (rather than a
> module loaded after CCF/genpd disable "unused" clocks/powerdomains)
> causes problems since the driver thinks the clocks are off, but in fact
> they are on.  This causes (for example) clk_set_rate() to fail.
>
> A better solution would be to support display handover from bootloader,
> but that will require some CCF+genpd changes before that is possible.
> So until then, we need this workaround.

Hmm.  Couldn't the clk_set_rate() just turn off the clock and then make
the rate change when there are no refs on the clk currently?
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