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Message-ID: <657ef910-e6fd-4791-988e-4aba03104c20@collabora.com>
Date: Thu, 6 Jun 2024 14:09:35 +0200
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Subject: Re: [PATCH v2 10/12] media: platform: mtk-mdp3: Get fine-grain
 control of cmdq_pkt_finalize()
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
 Matthias Brugger <matthias.bgg@gmail.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
 Mauro Carvalho Chehab <mchehab@kernel.org>, Moudy Ho
 <moudy.ho@mediatek.com>, "Jason-JH . Lin" <jason-jh.lin@mediatek.com>,
 linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org,
 dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
 linux-media@vger.kernel.org
References: <20240222154120.16959-1-chunkuang.hu@kernel.org>
 <20240222154120.16959-11-chunkuang.hu@kernel.org>
Content-Language: en-US
From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
In-Reply-To: <20240222154120.16959-11-chunkuang.hu@kernel.org>
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Le 22/02/2024 à 16:41, Chun-Kuang Hu a écrit :
> 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@kernel.org>
> ---
>   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 6adac857a477..b720e69b341d 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c
> @@ -471,7 +471,8 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param)
>   		dev_err(dev, "mdp_path_config error\n");
>   		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);
>   
>   	for (i = 0; i < num_comp; i++)
>   		memcpy(&comps[i], path->comps[i].comp,
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> index 94f4ed78523b..2214744c937c 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> @@ -231,6 +231,8 @@ static int mdp_probe(struct platform_device *pdev)
>   		goto err_put_scp;
>   	}
>   
> +	mdp->cmdq_shift_pa = cmdq_get_shift_pa(mdp->cmdq_clt->chan);
> +
>   	init_waitqueue_head(&mdp->callback_wq);
>   	ida_init(&mdp->mdp_ida);
>   	platform_set_drvdata(pdev, mdp);
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> index 7e21d226ceb8..ed61e0bb69ee 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
> @@ -83,6 +83,7 @@ struct mdp_dev {
>   	u32					id_count;
>   	struct ida				mdp_ida;
>   	struct cmdq_client			*cmdq_clt;
> +	u8					cmdq_shift_pa;

Can send a new version of this series because this patch can't
be applied on media_tree/master branch.
The code look correct for me but we need to be able to applied it
to perform more checks.

Regards,
Benjamin

>   	wait_queue_head_t			callback_wq;
>   
>   	struct v4l2_device			v4l2_dev;