linux-kernel - Re: [PATCH v2 1/2] media: i2c: max96717: coding style fixes

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Message-ID: <Zo0A2nVMQt49G0U3@tom-HP-ZBook-Fury-15-G7-Mobile-Workstation>
Date: Tue, 9 Jul 2024 11:20:26 +0200
From: Tommaso Merciai <tomm.merciai@...il.com>
To: Julien Massot <julien.massot@...labora.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	20240627151806.3999400-2-tomm.merciai@...il.com
Subject: Re: [PATCH v2 1/2] media: i2c: max96717: coding style fixes

Hi Julien,
Sorry for delay on reviewing/testing this.

On Mon, Jul 01, 2024 at 11:31:42AM +0200, Julien Massot wrote:
> Coding style fixes suggested by Sakari during the
> driver review.
> 
> Signed-off-by: Julien Massot <julien.massot@...labora.com>
> ---
>  drivers/media/i2c/max96717.c | 31 ++++++++++++-------------------
>  1 file changed, 12 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/media/i2c/max96717.c b/drivers/media/i2c/max96717.c
> index 859a439b64d9..4e85b8eb1e77 100644
> --- a/drivers/media/i2c/max96717.c
> +++ b/drivers/media/i2c/max96717.c
> @@ -25,6 +25,7 @@
>  #define MAX96717_PORTS      2
>  #define MAX96717_PAD_SINK   0
>  #define MAX96717_PAD_SOURCE 1
> +#define MAX96717_CSI_NLANES 4
>  
>  #define MAX96717_DEFAULT_CLKOUT_RATE	24000000UL
>  
> @@ -495,7 +496,6 @@ static int max96717_enable_streams(struct v4l2_subdev *sd,
>  				   u64 streams_mask)
>  {
>  	struct max96717_priv *priv = sd_to_max96717(sd);
> -	struct device *dev = &priv->client->dev;
>  	u64 sink_streams;
>  	int ret;
>  
> @@ -516,11 +516,8 @@ static int max96717_enable_streams(struct v4l2_subdev *sd,
>  		ret = v4l2_subdev_enable_streams(priv->source_sd,
>  						 priv->source_sd_pad,
>  						 sink_streams);
> -		if (ret) {
> -			dev_err(dev, "Fail to start streams:%llu on remote subdev\n",
> -				sink_streams);
> +		if (ret)
>  			goto stop_csi;
> -		}
>  	}
>  
>  	priv->enabled_source_streams |= streams_mask;
> @@ -530,6 +527,7 @@ static int max96717_enable_streams(struct v4l2_subdev *sd,
>  stop_csi:
>  	if (!priv->enabled_source_streams)
>  		max96717_start_csi(priv, false);
> +
>  	return ret;
>  }
>  
> @@ -769,11 +767,8 @@ max96717_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
>  static unsigned int max96717_clk_find_best_index(struct max96717_priv *priv,
>  						 unsigned long rate)
>  {
> -	unsigned int i, idx;
> -	unsigned long diff_new, diff_old;
> -
> -	diff_old = U32_MAX;
> -	idx = 0;
> +	unsigned int i, idx = 0;
> +	unsigned long diff_new, diff_old = U32_MAX;
>  
>  	for (i = 0; i < ARRAY_SIZE(max96717_predef_freqs); i++) {
>  		diff_new = abs(rate - max96717_predef_freqs[i].freq);
> @@ -860,8 +855,7 @@ static int max96717_register_clkout(struct max96717_priv *priv)
>  	struct clk_init_data init = { .ops = &max96717_clk_ops };
>  	int ret;
>  
> -	init.name = kasprintf(GFP_KERNEL, "max96717.%s.clk_out",
> -			      dev_name(dev));
> +	init.name = kasprintf(GFP_KERNEL, "max96717.%s.clk_out", dev_name(dev));
>  	if (!init.name)
>  		return -ENOMEM;
>  
> @@ -944,8 +938,9 @@ static int max96717_init_csi_lanes(struct max96717_priv *priv)
>  	 * Unused lanes need to be mapped as well to not have
>  	 * the same lanes mapped twice.
>  	 */
> -	for (; lane < 4; lane++) {
> -		unsigned int idx = find_first_zero_bit(&lanes_used, 4);
> +	for (; lane < MAX96717_CSI_NLANES; lane++) {
> +		unsigned int idx = find_first_zero_bit(&lanes_used,
> +						       MAX96717_CSI_NLANES);
>  
>  		val |= idx << (lane * 2);
>  		lanes_used |= BIT(idx);
> @@ -999,9 +994,7 @@ static int max96717_hw_init(struct max96717_priv *priv)
>  static int max96717_parse_dt(struct max96717_priv *priv)
>  {
>  	struct device *dev = &priv->client->dev;
> -	struct v4l2_fwnode_endpoint vep = {
> -		.bus_type = V4L2_MBUS_CSI2_DPHY
> -	};
> +	struct v4l2_fwnode_endpoint vep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
>  	struct fwnode_handle *ep_fwnode;
>  	unsigned char num_data_lanes;
>  	int ret;
> @@ -1019,11 +1012,11 @@ static int max96717_parse_dt(struct max96717_priv *priv)
>  		return dev_err_probe(dev, ret, "Failed to parse sink endpoint");
>  
>  	num_data_lanes = vep.bus.mipi_csi2.num_data_lanes;
> -	if (num_data_lanes < 1 || num_data_lanes > 4)
> +	if (num_data_lanes < 1 || num_data_lanes > MAX96717_CSI_NLANES)
>  		return dev_err_probe(dev, -EINVAL,
>  				     "Invalid data lanes must be 1 to 4\n");
>  
> -	memcpy(&priv->mipi_csi2, &vep.bus.mipi_csi2, sizeof(priv->mipi_csi2));
> +	priv->mipi_csi2 = vep.bus.mipi_csi2;
>  
>  	return 0;
>  }
> 
> -- 
> 2.45.2
> 

Patch looks good to me. I tested this on my gmsl2 alvium and all is working fine.

Reviewed-by: Tommaso Merciai <tomm.merciai@...il.com>
Tested-by: Tommaso Merciai <tomm.merciai@...il.com>

Thanks & Regards,
Tommaso