linux-kernel - Re: [PATCH v3 4/7] media: platform: amd: isp4 subdev and firmware loading handling added

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Message-ID: <20250903101002.GD13448@pendragon.ideasonboard.com>
Date: Wed, 3 Sep 2025 12:10:02 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Bin Du <Bin.Du@....com>
Cc: mchehab@...nel.org, hverkuil@...all.nl, bryan.odonoghue@...aro.org,
	sakari.ailus@...ux.intel.com,
	prabhakar.mahadev-lad.rj@...renesas.com,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	sultan@...neltoast.com, pratap.nirujogi@....com,
	benjamin.chan@....com, king.li@....com, gjorgji.rosikopulos@....com,
	Phil.Jawich@....com, Dominic.Antony@....com,
	mario.limonciello@....com, richard.gong@....com, anson.tsao@....com,
	Svetoslav Stoilov <Svetoslav.Stoilov@....com>
Subject: Re: [PATCH v3 4/7] media: platform: amd: isp4 subdev and firmware
 loading handling added

On Thu, Aug 28, 2025 at 06:08:08PM +0800, Bin Du wrote:
> Isp4 sub-device is implementing v4l2 sub-device interface. It has one
> capture video node, and supports only preview stream. It manages firmware
> states, stream configuration and mipi phy configuration. This change also
> adds interrupt handling and notification for isp firmware to isp-subdevice.
> 
> Co-developed-by: Svetoslav Stoilov <Svetoslav.Stoilov@....com>
> Signed-off-by: Svetoslav Stoilov <Svetoslav.Stoilov@....com>
> Signed-off-by: Bin Du <Bin.Du@....com>
> ---
>  MAINTAINERS                                   |    2 +
>  drivers/media/platform/amd/isp4/Makefile      |    3 +-
>  drivers/media/platform/amd/isp4/isp4.c        |  120 +-
>  drivers/media/platform/amd/isp4/isp4.h        |    8 +-
>  drivers/media/platform/amd/isp4/isp4_subdev.c | 1096 +++++++++++++++++
>  drivers/media/platform/amd/isp4/isp4_subdev.h |  131 ++
>  6 files changed, 1347 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/media/platform/amd/isp4/isp4_subdev.c
>  create mode 100644 drivers/media/platform/amd/isp4/isp4_subdev.h

[snip]

> diff --git a/drivers/media/platform/amd/isp4/isp4.h b/drivers/media/platform/amd/isp4/isp4.h
> index 8535f662ab49..00ac11ed8fb0 100644
> --- a/drivers/media/platform/amd/isp4/isp4.h
> +++ b/drivers/media/platform/amd/isp4/isp4.h
> @@ -6,19 +6,21 @@
>  #ifndef _ISP4_H_
>  #define _ISP4_H_
>  
> +#include <drm/amd/isp.h>
>  #include <linux/mutex.h>
> -#include <media/v4l2-device.h>
> -#include <media/videobuf2-memops.h>
> -#include <media/videobuf2-vmalloc.h>
> +#include "isp4_subdev.h"
>  
>  #define ISP4_GET_ISP_REG_BASE(isp4sd) (((isp4sd))->mmio)
>  
>  struct isp4_device {
>  	struct v4l2_device v4l2_dev;
> +	struct isp4_subdev isp_sdev;
>  	struct media_device mdev;
>  
> +	struct isp_platform_data *pltf_data;
>  	struct platform_device *pdev;
>  	struct notifier_block i2c_nb;
> +	struct v4l2_async_notifier notifier;

As far as I can tell, i2c_nb and notifier are not used anymore.

>  };
>  
>  #endif /* _ISP4_H_ */

[snip]

-- 
Regards,

Laurent Pinchart