Re: [PATCH v11 07/22] soc: mediatek: add cmdq support of mtk-mmsys config API for mt8195 vdosys1

[AngeloGioacchino Del Regno]

Il 10/01/22 09:46, Nancy.Lin ha scritto:
> 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@xxxxxxxxxxxx>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>