Re: [PATCH v8 3/5] staging: bcm2835-camera: Register bcm2835-camera with vchiq_bus_type

From: Greg KH <gregkh@linuxfoundation.org>
To: Umang Jain <umang.jain@ideasonboard.com>
Cc: linux-staging@lists.linux.dev,
	linux-rpi-kernel@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	stefan.wahren@i2se.com, f.fainelli@gmail.com,
	athierry@redhat.com, error27@gmail.com,
	dave.stevenson@raspberrypi.com, kieran.bingham@ideasonboard.com,
	laurent.pinchart@ideasonboard.com
Subject: Re: [PATCH v8 3/5] staging: bcm2835-camera: Register bcm2835-camera with vchiq_bus_type
Date: Mon, 3 Jul 2023 15:29:58 +0200	[thread overview]
Message-ID: <2023070319-daycare-pointless-abba@gregkh> (raw)
In-Reply-To: <20230627201628.207483-4-umang.jain@ideasonboard.com>

On Tue, Jun 27, 2023 at 10:16:26PM +0200, Umang Jain wrote:
> Register the bcm2835-camera with the vchiq_bus_type instead of using
> platform driver/device.
> 
> Also the VCHIQ firmware doesn't support device enumeration, hence
> one has to maintain a list of devices to be registered in the interface.
> 
> Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
> ---
>  .../bcm2835-camera/bcm2835-camera.c           | 16 +++++++-------
>  .../interface/vchiq_arm/vchiq_arm.c           | 21 ++++++++++++++++---
>  2 files changed, 26 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> index 346d00df815a..f37b2a881d92 100644
> --- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> +++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> @@ -24,8 +24,9 @@
>  #include <media/v4l2-event.h>
>  #include <media/v4l2-common.h>
>  #include <linux/delay.h>
> -#include <linux/platform_device.h>
>  
> +#include "../interface/vchiq_arm/vchiq_arm.h"
> +#include "../interface/vchiq_arm/vchiq_device.h"
>  #include "../vchiq-mmal/mmal-common.h"
>  #include "../vchiq-mmal/mmal-encodings.h"
>  #include "../vchiq-mmal/mmal-vchiq.h"
> @@ -1841,7 +1842,7 @@ static struct v4l2_format default_v4l2_format = {
>  	.fmt.pix.sizeimage = 1024 * 768,
>  };
>  
> -static int bcm2835_mmal_probe(struct platform_device *pdev)
> +static int bcm2835_mmal_probe(struct vchiq_device *device)
>  {
>  	int ret;
>  	struct bcm2835_mmal_dev *dev;
> @@ -1896,7 +1897,7 @@ static int bcm2835_mmal_probe(struct platform_device *pdev)
>  						       &camera_instance);
>  		ret = v4l2_device_register(NULL, &dev->v4l2_dev);
>  		if (ret) {
> -			dev_err(&pdev->dev, "%s: could not register V4L2 device: %d\n",
> +			dev_err(&device->dev, "%s: could not register V4L2 device: %d\n",
>  				__func__, ret);
>  			goto free_dev;
>  		}
> @@ -1976,7 +1977,7 @@ static int bcm2835_mmal_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static void bcm2835_mmal_remove(struct platform_device *pdev)
> +static void bcm2835_mmal_remove(struct vchiq_device *device)
>  {
>  	int camera;
>  	struct vchiq_mmal_instance *instance = gdev[0]->instance;
> @@ -1988,17 +1989,16 @@ static void bcm2835_mmal_remove(struct platform_device *pdev)
>  	vchiq_mmal_finalise(instance);
>  }
>  
> -static struct platform_driver bcm2835_camera_driver = {
> +static struct vchiq_driver bcm2835_camera_driver = {
>  	.probe		= bcm2835_mmal_probe,
> -	.remove_new	= bcm2835_mmal_remove,
> +	.remove		= bcm2835_mmal_remove,

No need to change this here, right?  That's independant of this patch
series.

thanks,

greg k-h

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