linux-kernel - Re: [PATCH v10 20/24] drm/mediatek: Add Padding to OVL adaptor

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Date:   Thu, 19 Oct 2023 11:10:07 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Hsiao Chien Sung <shawn.sung@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, Fei Shao <fshao@...omium.org>,
        Sean Paul <sean@...rly.run>,
        Johnson Wang <johnson.wang@...iatek.corp-partner.google.com>,
        "Nancy . Lin" <nancy.lin@...iatek.com>,
        Moudy Ho <moudy.ho@...iatek.com>,
        "Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
        Nathan Lu <nathan.lu@...iatek.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v10 20/24] drm/mediatek: Add Padding to OVL adaptor

Il 19/10/23 07:56, Hsiao Chien Sung ha scritto:
> Add MT8188 Padding to OVL adaptor to probe the driver.
> 
> Reviewed-by: CK Hu <ck.hu@...iatek.com>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
> ---
>   .../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c   | 26 +++++++++++++++++++
>   1 file changed, 26 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> index f46ca1c68610..f693b47745ba 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> @@ -29,6 +29,7 @@ enum mtk_ovl_adaptor_comp_type {
>   	OVL_ADAPTOR_TYPE_ETHDR,
>   	OVL_ADAPTOR_TYPE_MDP_RDMA,
>   	OVL_ADAPTOR_TYPE_MERGE,
> +	OVL_ADAPTOR_TYPE_PADDING,
>   	OVL_ADAPTOR_TYPE_NUM,
>   };
>   
> @@ -46,6 +47,14 @@ enum mtk_ovl_adaptor_comp_id {
>   	OVL_ADAPTOR_MERGE1,
>   	OVL_ADAPTOR_MERGE2,
>   	OVL_ADAPTOR_MERGE3,
> +	OVL_ADAPTOR_PADDING0,
> +	OVL_ADAPTOR_PADDING1,
> +	OVL_ADAPTOR_PADDING2,
> +	OVL_ADAPTOR_PADDING3,
> +	OVL_ADAPTOR_PADDING4,
> +	OVL_ADAPTOR_PADDING5,
> +	OVL_ADAPTOR_PADDING6,
> +	OVL_ADAPTOR_PADDING7,
>   	OVL_ADAPTOR_ID_MAX
>   };
>   
> @@ -66,6 +75,7 @@ static const char * const private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
>   	[OVL_ADAPTOR_TYPE_ETHDR]	= "ethdr",
>   	[OVL_ADAPTOR_TYPE_MDP_RDMA]	= "vdo1-rdma",
>   	[OVL_ADAPTOR_TYPE_MERGE]	= "merge",
> +	[OVL_ADAPTOR_TYPE_PADDING]	= "padding",
>   };
>   
>   static const struct mtk_ddp_comp_funcs ethdr = {
> @@ -80,6 +90,13 @@ static const struct mtk_ddp_comp_funcs merge = {
>   	.clk_disable = mtk_merge_clk_disable,
>   };
>   
> +static const struct mtk_ddp_comp_funcs padding = {
> +	.clk_enable = mtk_padding_clk_enable,
> +	.clk_disable = mtk_padding_clk_disable,
> +	.start = mtk_padding_start,
> +	.stop = mtk_padding_stop,
> +};
> +
>   static const struct mtk_ddp_comp_funcs rdma = {
>   	.power_on = mtk_mdp_rdma_power_on,
>   	.power_off = mtk_mdp_rdma_power_off,
> @@ -101,6 +118,14 @@ static const struct ovl_adaptor_comp_match comp_matches[OVL_ADAPTOR_ID_MAX] = {
>   	[OVL_ADAPTOR_MERGE1] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE2, 2, &merge },
>   	[OVL_ADAPTOR_MERGE2] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE3, 3, &merge },
>   	[OVL_ADAPTOR_MERGE3] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE4, 4, &merge },
> +	[OVL_ADAPTOR_PADDING0] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING0, 0, &padding },
> +	[OVL_ADAPTOR_PADDING1] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING1, 1, &padding },
> +	[OVL_ADAPTOR_PADDING2] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING2, 2, &padding },
> +	[OVL_ADAPTOR_PADDING3] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING3, 3, &padding },
> +	[OVL_ADAPTOR_PADDING4] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING4, 4, &padding },
> +	[OVL_ADAPTOR_PADDING5] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING5, 5, &padding },
> +	[OVL_ADAPTOR_PADDING6] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING6, 6, &padding },
> +	[OVL_ADAPTOR_PADDING7] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING7, 7, &padding },
>   };
>   
>   void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int idx,
> @@ -436,6 +461,7 @@ static int ovl_adaptor_comp_get_id(struct device *dev, struct device_node *node,
>   }
>   
>   static const struct of_device_id mtk_ovl_adaptor_comp_dt_ids[] = {
> +	{ .compatible = "mediatek,mt8188-padding", .data = (void *)OVL_ADAPTOR_TYPE_PADDING },

Uhm, for consistency I'd call this "mediatek,mt8188-disp-padding" (you don't have
to drop Reviewed-by tags for such a change, not here and not in the yaml commit),
but it's fine if you have reasons against that.

So, regardless of this being changed or not

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

>   	{ .compatible = "mediatek,mt8195-disp-ethdr", .data = (void *)OVL_ADAPTOR_TYPE_ETHDR },
>   	{ .compatible = "mediatek,mt8195-disp-merge", .data = (void *)OVL_ADAPTOR_TYPE_MERGE },
>   	{ .compatible = "mediatek,mt8195-vdo1-rdma", .data = (void *)OVL_ADAPTOR_TYPE_MDP_RDMA },