[v5, PATCH] drm/mediatek: add dma buffer control for drm plane disable

[Maxime Ripard]

Hi,

On Wed, Jul 05, 2023 at 02:07:18PM +0800, Yongqiang Niu wrote:
> dma buffer release before overlay disable, that will cause
> m4u translation fault warning.
> 
> add dma buffer control flow in mediatek driver:
> get dma buffer when drm plane disable
> put dma buffer when overlay really disable
> 
> Fixes: 41016fe1028e ("drm: Rename plane->state variables in atomic update and disable")
> Signed-off-by: Yongqiang Niu <yongqiang.niu at mediatek.com>

I think we need more details in the commit message about what the issue
is exactly and how it's fixed.

This definitely feels like it's not something drivers should have to do.

Maxime
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