linux-kernel - Re: [PATCH v4 1/3] media: platform: mtk-mdp3: Get fine-grain control of cmdq_pkt

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Message-ID: <a47e464c-6a6e-4121-b521-7dec741caa66@gmail.com>
Date: Mon, 2 Sep 2024 17:11:09 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Moudy Ho
 <moudy.ho@...iatek.com>, "Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 linux-media@...r.kernel.org
Subject: Re: [PATCH v4 1/3] media: platform: mtk-mdp3: Get fine-grain control
 of cmdq_pkt_finalize()



On 01/09/2024 16:32, Chun-Kuang Hu wrote:
> In order to have fine-grained control, use cmdq_pkt_eoc() and
> cmdq_pkt_jump_rel() to replace cmdq_pkt_finalize().
> 
> Signed-off-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

> ---
>   drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 3 ++-
>   drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 2 ++
>   drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h | 1 +
>   3 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> index ea2ea119dd2a..ef5dade35fd3 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> @@ -676,7 +676,8 @@ static struct mdp_cmdq_cmd *mdp_cmdq_prepare(struct mdp_dev *mdp,
>   		dev_err(dev, "mdp_path_config error %d\n", pp_idx);
>   		goto err_free_path;
>   	}
> -	cmdq_pkt_finalize(&cmd->pkt);
> +	cmdq_pkt_eoc(&cmd->pkt);
> +	cmdq_pkt_jump_rel(&cmd->pkt, CMDQ_INST_SIZE, mdp->cmdq_shift_pa[pp_idx]);
>   
>   	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 37e7b985d52c..40623c1980bf 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> @@ -312,6 +312,8 @@ 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 430251f63754..05cade1d098e 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> @@ -126,6 +126,7 @@ 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;