[PATCH] drm/vc4: Fix with pm_runtime synchronization on DSI

[Eric Anholt]

Hoegeun Kwon <hoegeun.kwon at samsung.com> writes:

> On 4/2/19 2:48 AM, Eric Anholt wrote:
>> Hoegeun Kwon <hoegeun.kwon at samsung.com> writes:
>>
>>> There is a problem when often dpms goes from off to on. pm idle is not
>>> in sync and the problem occurs. Modify pm_runtime_put from
>>> asynchronous to synchronous.
>> Why would we need the power domain to go to off before we try to come
>> back?  Any idea?  Also, please specify what "the problem" is.
>
> Hi Eric,
>
>
> First thank you for your review.
>
> There is a problem failed to runtime PM enable on DSI when often dpms

What do you mean by "failed to runtime PM enable"?  The
pm_runtime_enable() returned an error?  Have you investigated the source
that error, if so?
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