[PATCH v17 06/21] soc: mediatek: add cmdq support of mtk-mmsys config API for mt8195 vdosys1

[Rex-BC Chen]

On Sat, 2022-04-16 at 10:07 +0800, Nancy.Lin wrote:
> Add cmdq support for mtk-mmsys config API.
> The mmsys config register settings need to take effect with the other
> HW settings(like OVL_ADAPTOR...) at the same vblanking time.
> 
> If we use CPU to write the mmsys reg, we can't guarantee all the
> settings can be written in the same vblanking time.
> Cmdq is used for this purpose. We prepare all the related HW settings
> in one cmdq packet. The first command in the packet is "wait stream
> done",
> and then following with all the HW settings. After the cmdq packet is
> flush to GCE HW. The GCE waits for the "stream done event" to coming
> and then starts flushing all the HW settings. This can guarantee all
> the settings flush in the same vblanking.
> 
> Signed-off-by: Nancy.Lin <nancy.lin at mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno at collabora.com>
> ---

Reviewed-by: Rex-BC Chen <rex-bc.chen at mediatek.com>