linux-kernel - Re: [PATCH v7 17/20] media: platform: mtk-mdp3: Use cmdq_pkt_jump_rel() without shift

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Message-ID: <ae08e53e055a238cde639dc9d9c7263fa296af5f.camel@ndufresne.ca>
Date: Tue, 09 Dec 2025 16:01:44 -0500
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Jason-JH Lin <jason-jh.lin@...iatek.com>, Rob Herring <robh@...nel.org>,
  Krzysztof Kozlowski	 <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jassi Brar	 <jassisinghbrar@...il.com>, Chun-Kuang
 Hu <chunkuang.hu@...nel.org>,  AngeloGioacchino Del Regno
 <angelogioacchino.delregno@...labora.com>, Mauro Carvalho Chehab
 <mchehab@...nel.org>
Cc: Matthias Brugger <matthias.bgg@...il.com>, Nancy Lin	
 <nancy.lin@...iatek.com>, Singo Chang <singo.chang@...iatek.com>, Paul-PL
 Chen	 <paul-pl.chen@...iatek.com>, Moudy Ho <moudy.ho@...iatek.com>,
 Xiandong Wang	 <xiandong.wang@...iatek.com>, Sirius Wang
 <sirius.wang@...iatek.com>, Fei Shao	 <fshao@...omium.org>, Chen-yu Tsai
 <wenst@...omium.org>, 	Project_Global_Chrome_Upstream_Group@...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, 	linux-media@...r.kernel.org
Subject: Re: [PATCH v7 17/20] media: platform: mtk-mdp3: Use
 cmdq_pkt_jump_rel() without shift_pa

Hi,

Le mercredi 27 août 2025 à 19:37 +0800, Jason-JH Lin a écrit :
> With the removal of the shift_pa parameter, cmdq_pkt_jump_rel_temp()
> can be replaced by the new cmdq_pkt_jump_rel() without shift_pa.
> 
> Then, remove the cmdq_shift_pa variable in the mdp_dev structure for
> each mbox client.
> 
> Fixes: ade176534112 ("soc: mediatek: cmdq: Add parameter shift_pa to cmdq_pkt_jump()")
> Signed-off-by: Jason-JH Lin <jason-jh.lin@...iatek.com>
> ---
>  drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 2 +-
>  drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 2 --
>  drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h | 1 -
>  3 files changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> index 7575ec376367..c35fe0e3a4d5 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> @@ -638,7 +638,7 @@ static struct mdp_cmdq_cmd *mdp_cmdq_prepare(struct mdp_dev *mdp,
>  		goto err_free_path;
>  	}
>  	cmdq_pkt_eoc(&cmd->pkt);
> -	cmdq_pkt_jump_rel_temp(&cmd->pkt, CMDQ_INST_SIZE, mdp->cmdq_shift_pa[pp_idx]);
> +	cmdq_pkt_jump_rel(&cmd->pkt, CMDQ_INST_SIZE);

That effectively revert another patch that is pending, and remove the use of the
new cmdq_pkt_jump_rel_temp(). I don't follow what is doing on here, I think some
context must be lost.

Nicolas

>  
>  	for (i = 0; i < num_comp; i++) {
>  		s32 inner_id = MDP_COMP_NONE;
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> index 8de2c8e4d333..2f8147481bd6 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> @@ -293,8 +293,6 @@ static int mdp_probe(struct platform_device *pdev)
>  			ret = PTR_ERR(mdp->cmdq_clt[i]);
>  			goto err_mbox_destroy;
>  		}
> -
> -		mdp->cmdq_shift_pa[i] = cmdq_get_shift_pa(mdp->cmdq_clt[i]->chan);
>  	}
>  
>  	init_waitqueue_head(&mdp->callback_wq);
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> index 05cade1d098e..430251f63754 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> @@ -126,7 +126,6 @@ struct mdp_dev {
>  	u32					id_count;
>  	struct ida				mdp_ida;
>  	struct cmdq_client			*cmdq_clt[MDP_PP_MAX];
> -	u8					cmdq_shift_pa[MDP_PP_MAX];
>  	wait_queue_head_t			callback_wq;
>  
>  	struct v4l2_device			v4l2_dev;

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