linux-kernel - Re: [PATCH v6 5/7] drm/mediatek: dpi: Add dpintf support

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Date:   Wed, 15 Dec 2021 21:14:19 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Guillaume Ranquet <granquet@...libre.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Markus Schneider-Pargmann <msp@...libre.com>,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 5/7] drm/mediatek: dpi: Add dpintf support



On 10/11/2021 14:06, Guillaume Ranquet wrote:
> From: Markus Schneider-Pargmann <msp@...libre.com>
> 
> dpintf is the displayport interface hardware unit. This unit is similar
> to dpi and can reuse most of the code.
> 
> This patch adds support for mt8195-dpintf to this dpi driver. Main
> differences are:
>   - Some features/functional components are not available for dpintf
>     which are now excluded from code execution once is_dpintf is set
>   - dpintf can and needs to choose between different clockdividers based
>     on the clockspeed. This is done by choosing a different clock parent.
>   - There are two additional clocks that need to be managed. These are
>     only set for dpintf and will be set to NULL if not supplied. The
>     clk_* calls handle these as normal clocks then.
>   - Some register contents differ slightly between the two components. To
>     work around this I added register bits/masks with a DPINTF_ prefix
>     and use them where different.
> 
> Based on a separate driver for dpintf created by
> Jason-JH.Lin <jason-jh.lin@...iatek.com>.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
> Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
> ---
[...]
> diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
> index 4bba275e235ac..56ed2fa5f59e8 100644
> --- a/include/linux/soc/mediatek/mtk-mmsys.h
> +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> @@ -19,6 +19,8 @@ enum mtk_ddp_comp_id {
>   	DDP_COMPONENT_DITHER,
>   	DDP_COMPONENT_DPI0,
>   	DDP_COMPONENT_DPI1,
> +	DDP_COMPONENT_DP_INTF0,
> +	DDP_COMPONENT_DP_INTF1,
>   	DDP_COMPONENT_DSI0,
>   	DDP_COMPONENT_DSI1,
>   	DDP_COMPONENT_DSI2,
> 

For the mtk-mmsys.h:
Acked-by: Matthias Brugger <matthias.bgg@...il.com>