[PATCH v22 15/24] drm/mediatek: add display merge start/stop API for cmdq support

[Rex-BC Chen]

On Thu, 2022-05-26 at 19:02 +0800, Nancy.Lin wrote:
> Add merge start/stop API for cmdq support. The ovl_adaptor merges
> are configured with each drm plane update. Need to enable/disable
> merge with cmdq making sure all the settings taken effect in the
> same vblank.
> 
> Signed-off-by: Nancy.Lin <nancy.lin at mediatek.com>
> Reviewed-by: Chun-Kuang Hu <chunkuang.hu at kernel.org>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno at collabora.com>
> Tested-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno at collabora.com>
> ---
>  

[Bo-Chen: Test on MT8195 Tomato Chromebook with external display]
Tested-by: Bo-Chen Chen <rex-bc.chen at mediatek.com>