linux-kernel - Re: [PATCH v2 18/18] media: i2c: max9286: Rework comments in .bound()

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Message-ID: <3067efad-a563-842f-5cf8-d38dfe0a96e1@ideasonboard.com>
Date:   Mon, 15 Mar 2021 17:28:09 +0000
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>,
        laurent.pinchart+renesas@...asonboard.com,
        niklas.soderlund+renesas@...natech.se, geert@...ux-m68k.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 18/18] media: i2c: max9286: Rework comments in .bound()

On 15/03/2021 13:15, Jacopo Mondi wrote:
> Re-phrase a comment in .bound() callback to make it clear we register
> a subdev notifier and remove a redundant comment about disabling i2c
> auto-ack.
> 
> No functional changes intended.
> 
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>

> ---
>  drivers/media/i2c/max9286.c | 16 ++++++----------
>  1 file changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
> index b6347639901e..16b2cb9b44a2 100644
> --- a/drivers/media/i2c/max9286.c
> +++ b/drivers/media/i2c/max9286.c
> @@ -556,9 +556,9 @@ static int max9286_notify_bound(struct v4l2_async_notifier *notifier,
>  		subdev->name, src_pad, index);
>  
>  	/*
> -	 * We can only register v4l2_async_notifiers, which do not provide a
> -	 * means to register a complete callback. bound_sources allows us to
> -	 * identify when all remote serializers have completed their probe.
> +	 * As we register a subdev notifiers we won't get a .complete() callback
> +	 * here, so we have to use bound_sources to identify when all remote
> +	 * serializers have probed.
>  	 */
>  	if (priv->bound_sources != priv->source_mask)
>  		return 0;
> @@ -581,16 +581,12 @@ static int max9286_notify_bound(struct v4l2_async_notifier *notifier,
>  	/*
>  	 * All enabled sources have probed and enabled their reverse control
>  	 * channels:
> +	 * - The reverse channel amplitude stays high
>  	 * - Verify all configuration links are properly detected
> -	 * - Disable auto-ack as communication on the control channel are now
> -	 *   stable.
> +	 * - Disable auto-ack as communications on the control channel are now
> +	 *   stable
>  	 */
>  	max9286_check_config_link(priv, priv->source_mask);
> -
> -	/*
> -	 * Re-configure I2C with local acknowledge disabled after cameras have
> -	 * probed.
> -	 */
>  	max9286_configure_i2c(priv, false);
>  
>  	return max9286_set_pixelrate(priv);
>