linux-kernel - Re: [PATCH v1 05/10] media: platform: mediatek: add isp

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Message-ID: <3eabad2974c715ce7182c1d4b1181d532122e427.camel@mediatek.com>
Date: Wed, 30 Oct 2024 05:43:01 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: "sumit.semwal@...aro.org" <sumit.semwal@...aro.org>,
	"christian.koenig@....com" <christian.koenig@....com>, "mchehab@...nel.org"
	<mchehab@...nel.org>, "conor+dt@...nel.org" <conor+dt@...nel.org>,
	"robh@...nel.org" <robh@...nel.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Shu-hsiang Yang (楊舒翔)
	<Shu-hsiang.Yang@...iatek.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"yunkec@...omium.org" <yunkec@...omium.org>, "linaro-mm-sig@...ts.linaro.org"
	<linaro-mm-sig@...ts.linaro.org>, "linux-media@...r.kernel.org"
	<linux-media@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, Yaya Chang (張雅清)
	<Yaya.Chang@...iatek.com>, Project_Global_Chrome_Upstream_Group
	<Project_Global_Chrome_Upstream_Group@...iatek.com>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Teddy Chen (陳乾元) <Teddy.Chen@...iatek.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "hidenorik@...omium.org"
	<hidenorik@...omium.org>, Shun-Yi Wang (王順億)
	<Shun-Yi.Wang@...iatek.com>
Subject: Re: [PATCH v1 05/10] media: platform: mediatek: add isp_7x camsys
 unit

Hi, Shu-hsiang:

On Wed, 2024-10-09 at 19:15 +0800, Shu-hsiang Yang wrote:
> Introduces the top media device driver for the MediaTek ISP7X CAMSYS.
> The driver maintains the camera system, including sub-device management,
> DMA operations, and integration with the V4L2 framework. It handles
> request stream data, buffer management, and MediaTek-specific features,
> and pipeline management, streaming control, error handling mechanism.
> Additionally, it aggregates sub-drivers for the camera interface, raw
> and yuv pipelines.
> 
> Signed-off-by: Shu-hsiang Yang <Shu-hsiang.Yang@...iatek.com>
> ---

[snip]

> +struct mtk_cam_device {
> +	struct device *dev;
> +
> +	struct v4l2_device v4l2_dev;
> +	struct v4l2_async_notifier notifier;
> +	struct media_device media_dev;
> +	void __iomem *base;
> +
> +	struct mtk_scp *scp;
> +	struct device *smem_dev;
> +	phandle rproc_phandle;

rproc_phandle is useless, so drop it.

> +	struct rproc *rproc_handle;
> +
> +	unsigned int composer_cnt;
> +
> +	unsigned int num_seninf_devices;
> +	unsigned int num_raw_devices;
> +	unsigned int num_larb_devices;

num_larb_devices is useless, so drop it.

Regards,
CK

> +
> +	/* raw_pipe controller subdev */
> +	struct mtk_raw raw;
> +	struct mutex queue_lock; /* protect queue request */
> +
> +	unsigned int max_stream_num;
> +	unsigned int streaming_ctx;
> +	unsigned int streaming_pipe;
> +	struct mtk_cam_ctx *ctxs;
> +
> +	/* request related */
> +	struct list_head pending_job_list;
> +	spinlock_t pending_job_lock; /* protect pending_job_list */
> +	struct list_head running_job_list;
> +	unsigned int running_job_count;
> +	spinlock_t running_job_lock; /* protect running_job_list */
> +
> +	/* standard v4l2 buffer control */
> +	struct list_head dma_pending;
> +	spinlock_t dma_pending_lock; /* protect dma_pending_list */
> +	struct list_head dma_processing;
> +	spinlock_t dma_processing_lock; /* protect dma_processing_list and dma_processing_count */
> +	unsigned int dma_processing_count;
> +
> +	struct mtk_cam_debug_fs *debug_fs;
> +	struct workqueue_struct *debug_wq;
> +	struct workqueue_struct *debug_exception_wq;
> +	wait_queue_head_t debug_exception_waitq;
> +};
> +