Re: [PATCH 1/4] drm/exynos: dsim: fix to control mipi phy register

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On 09/02/15 13:17, Inki Dae wrote:
>> Instead I just added syscon support to the PHY layer, it's not perfect
>> > but fixes the issue for both DSI and CSI and  doesn't strip the PHY layer
>> > which could potentially be useful.
>
> Ah, Right. I didn't check your patch set. Your way is a better idea than
> my one. With this, we don't need to change device drivers, MIPI DSI and CSI.
> 
> Then, what is the meaning that it's not perfect?

What I didn't like is that there are at least 3 mutexes on the phy_power_on/
phy_power_off path (PHY core, PHY driver, regmap) and there is another level
of indirection after introducing the regmap. I guess it's nothing serious
though. And BTW the syscon could be converted to use spinlock rather than
a mutex, since in our case behind the PMU syscon is always a memory mapped
region.

-- 
Regards,
Sylwester
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