linux-kernel - Re: [PATCH v7 10/20] soc: mediatek: mtk-cmdq: Add new APIs to replace cmdq_pkt_write() and cmdq_pkt_write

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Message-ID: <b2335fd9296bc6f3511f8139870f0c34db1be62a.camel@mediatek.com>
Date: Fri, 5 Sep 2025 09:41:52 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>, "AngeloGioacchino Del
 Regno" <angelogioacchino.delregno@...labora.com>, "robh@...nel.org"
	<robh@...nel.org>, Jason-JH Lin (林睿祥)
	<Jason-JH.Lin@...iatek.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	"jassisinghbrar@...il.com" <jassisinghbrar@...il.com>, "mchehab@...nel.org"
	<mchehab@...nel.org>, "conor+dt@...nel.org" <conor+dt@...nel.org>
CC: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	Sirius Wang (王皓昱) <Sirius.Wang@...iatek.com>,
	Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>,
	Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
	Xiandong Wang (王先冬)
	<Xiandong.Wang@...iatek.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "nicolas@...fresne.ca"
	<nicolas@...fresne.ca>, Paul-pl Chen (陳柏霖)
	<Paul-pl.Chen@...iatek.com>, "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>, Project_Global_Chrome_Upstream_Group
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	<matthias.bgg@...il.com>
Subject: Re: [PATCH v7 10/20] soc: mediatek: mtk-cmdq: Add new APIs to replace
 cmdq_pkt_write() and cmdq_pkt_write_mask()

On Wed, 2025-08-27 at 19:37 +0800, Jason-JH Lin wrote:
> To support generating GCE write instructions using both pa_base and
> subsys, the original cmdq_pkt_write() and cmdq_pkt_write_mask() have
> been expanded into four new APIs:
> - Replaced cmdq_pkt_write() to cmdq_pkt_write_pa() and
>   cmdq_pkt_write_subsys().
> - Replaced cmdq_pkt_write_mask() to cmdq_pkt_write_mask_pa() and
>   cmdq_pkt_write_mask_subsys().
> 
> The original cmdq_pkt_write() and cmdq_pkt_write_mask() will be removed
> after all CMDQ users have migrated to the new APIs.
> 
> Signed-off-by: Jason-JH Lin <jason-jh.lin@...iatek.com>
> ---
>  drivers/soc/mediatek/mtk-cmdq-helper.c | 41 +++++++++++++
>  include/linux/soc/mediatek/mtk-cmdq.h  | 79 ++++++++++++++++++++++++++
>  2 files changed, 120 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 41e1997cdd53..7e86299213d8 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -213,6 +213,26 @@ int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
>  }
>  EXPORT_SYMBOL(cmdq_pkt_write);
>  
> +int cmdq_pkt_write_pa(struct cmdq_pkt *pkt, u8 subsys /*unused*/, u32 pa_base,
> +		      u16 offset, u32 value)

subsys is useless. Drop it.

> +{
> +	int err;
> +
> +	err = cmdq_pkt_assign(pkt, CMDQ_THR_SPR_IDX0, CMDQ_ADDR_HIGH(pa_base));
> +	if (err < 0)
> +		return err;
> +
> +	return cmdq_pkt_write_s_value(pkt, CMDQ_THR_SPR_IDX0, CMDQ_ADDR_LOW(offset), value);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_pa);
> +
> +int cmdq_pkt_write_subsys(struct cmdq_pkt *pkt, u8 subsys, u32 pa_base /*unused*/,
> +			  u16 offset, u32 value)

pa_base is useless. Drop it.

> +{
> +	return cmdq_pkt_write(pkt, subsys, offset, value);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_subsys);
> +
>  int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
>  			u16 offset, u32 value, u32 mask)
>  {
> @@ -230,6 +250,27 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
>  }
>  EXPORT_SYMBOL(cmdq_pkt_write_mask);
>  
> +int cmdq_pkt_write_mask_pa(struct cmdq_pkt *pkt, u8 subsys /*unused*/, u32 pa_base,
> +			   u16 offset, u32 value, u32 mask)

subsys is useless. Drop it.

> +{
> +	int err;
> +
> +	err = cmdq_pkt_assign(pkt, CMDQ_THR_SPR_IDX0, CMDQ_ADDR_HIGH(pa_base));
> +	if (err < 0)
> +		return err;
> +
> +	return cmdq_pkt_write_s_mask_value(pkt, CMDQ_THR_SPR_IDX0,
> +					   CMDQ_ADDR_LOW(offset), value, mask);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_mask_pa);
> +
> +int cmdq_pkt_write_mask_subsys(struct cmdq_pkt *pkt, u8 subsys, u32 pa_base /*unused*/,
> +			       u16 offset, u32 value, u32 mask)

pa_base is useless. Drop it.

> +{
> +	return cmdq_pkt_write_mask(pkt, subsys, offset, value, mask);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_mask_subsys);
> +