Re: [PATCH v4 4/5] media: platform: mediatek: isp_30: add mediatek ISP3.0 camsv

["CK Hu (胡俊光)" <ck.hu@mediatek.com>]

Hi, Julien:

On Wed, 2024-01-10 at 15:14 +0100, Julien Stephan wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  From: Phi-bang Nguyen <pnguyen@baylibre.com>
> 
> This driver provides a path to bypass the SoC ISP so that image data
> coming from the SENINF can go directly into memory without any image
> processing. This allows the use of an external ISP.
> 
> Signed-off-by: Phi-bang Nguyen <pnguyen@baylibre.com>
> Signed-off-by: Florian Sylvestre <fsylvestre@baylibre.com>
> [Paul Elder fix irq locking]
> Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
> Co-developed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Co-developed-by: Julien Stephan <jstephan@baylibre.com>
> Signed-off-by: Julien Stephan <jstephan@baylibre.com>
> ---

[snip]

> +
> +static void mtk_cam_cmos_vf_enable(struct mtk_cam_dev *cam_dev,
> +				   bool enable, bool pak_en)
> +{
> +	struct device *dev = cam_dev->dev;
> +	unsigned long flags = 0;
> +
> +	if (pm_runtime_get_sync(dev) < 0) {
> +		dev_err(dev, "failed to get pm_runtime\n");
> +		goto out;
> +	}
> +
> +	spin_lock_irqsave(&cam_dev->irqlock, flags);

The comment of cam_dev->irqlock is "Protects the buffer list". Why do
you protect hw_enable/hw_disable? And I think the naming of irqlock
should be changed to 'buf_list_lock'.

Regards,
CK

> +	if (enable)
> +		(*cam_dev->hw_functions-
> >mtk_cam_cmos_vf_hw_enable)(cam_dev, pak_en);
> +	else
> +		(*cam_dev->hw_functions-
> >mtk_cam_cmos_vf_hw_disable)(cam_dev, pak_en);
> +	spin_unlock_irqrestore(&cam_dev->irqlock, flags);
> +
> +out:
> +	pm_runtime_put_autosuspend(dev);
> +}
> +