Re: [PATCH v5 8/8] drm: rcar-du: kms: Expand comment in vsps parsing routine

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Hi Jacopo,

On 15/10/2019 11:46, Jacopo Mondi wrote:
> Expand comment in the 'vsps' parsing routine to specify the LIF
> channel index defaults to 0 in case the second cell of the property
> is not specified to remain compatible with older DT bindings.

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

> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> ---
>  drivers/gpu/drm/rcar-du/rcar_du_kms.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index 7c9fb5860e54..186422ac552b 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -587,7 +587,11 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
>  
>  		vsps[j].crtcs_mask |= BIT(i);
>  
> -		/* Store the VSP pointer and pipe index in the CRTC. */
> +		/*
> +		 * Store the VSP pointer and pipe index in the CRTC. If the
> +		 * second cell of the 'vsps' specifier isn't present, default
> +		 * to 0 to remain compatible with older DT bindings.
> +		 */
>  		rcdu->crtcs[i].vsp = &rcdu->vsps[j];
>  		rcdu->crtcs[i].vsp_pipe = cells >= 1 ? args.args[0] : 0;
>  	}
> 

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