Re: [PATCH v8 3/3] media: rcar-csi2: Optimize the selection PHTW register

[Niklas Söderlund]

Hi Suresh,

Thanks for your work.

On 2020-06-18 19:34:32 +0900, Suresh Udipi wrote:
> PHTW register is selected based on default bit rate from Table[1].
> for the bit rates less than or equal to 250. Currently first
> value of default bit rate which is greater than or equal to
> the caculated mbps is selected.This selection can be further

Missing space 'selected.This'.

> improved by selecting the default bit rate which is nearest to
> the calculated value.
> 
> [1] specs r19uh0105ej0200-r-car-3rd-generation.pdf [Table 25.12]
> 
> Fixes: 769afd212b16 ("media: rcar-csi2: add Renesas R-Car MIPI CSI-2 receiver driver")

Nit-pick: No need for a blank line between fixes and SoB.

> 
> Signed-off-by: Suresh Udipi <sudipi@xxxxxxxxxxxxxx>
> Signed-off-by: Michael Rodin <mrodin@xxxxxxxxxxxxxx>
> ---
>  drivers/media/platform/rcar-vin/rcar-csi2.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c
> index 1184527..d7bf59f 100644
> --- a/drivers/media/platform/rcar-vin/rcar-csi2.c
> +++ b/drivers/media/platform/rcar-vin/rcar-csi2.c
> @@ -917,10 +917,18 @@ static int rcsi2_phtw_write_mbps(struct rcar_csi2 *priv, unsigned int mbps,
>  				 const struct rcsi2_mbps_reg *values, u16 code)
>  {
>  	const struct rcsi2_mbps_reg *value;
> +	const struct rcsi2_mbps_reg *prev_value = NULL;
>  
> -	for (value = values; value->mbps; value++)
> +	for (value = values; value->mbps; value++) {
>  		if (value->mbps >= mbps)
>  			break;
> +		prev_value = value;
> +	}
> +
> +	if (prev_value &&
> +	    ((mbps - prev_value->mbps) <= (value->mbps - mbps)))
> +		value = prev_value;
> +

One to many blank lines. With this and the commit message fixed,

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>

Nice work, thanks again for being persistent with this!

>  
>  	if (!value->mbps) {
>  		dev_err(priv->dev, "Unsupported PHY speed (%u Mbps)", mbps);
> -- 
> 2.7.4
> 

-- 
Regards,
Niklas Söderlund