[v2] drm/msm: add shutdown support for display platform_driver

[Emil Velikov]

Hi Krishna,

On Tue, 2 Jun 2020 at 08:17, Krishna Manikandan <mkrishn at codeaurora.org> wrote:
>
> Define shutdown callback for display drm driver,
> so as to disable all the CRTCS when shutdown
> notification is received by the driver.
>
> This change will turn off the timing engine so
> that no display transactions are requested
> while mmu translations are getting disabled
> during reboot sequence.
>
> Signed-off-by: Krishna Manikandan <mkrishn at codeaurora.org>
>
AFAICT atomics is setup in msm_drm_ops::bind and shutdown in
msm_drm_ops::unbind.

Are you saying that unbind never triggers? If so, then we should
really fix that instead, since this patch seems more like a
workaround.

-Emil