drm: rcar-du: kms: Expand comment in vsps parsing routine

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: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Jacopo Mondi 2019-09-06 15:50:12 +02:00 committed by Laurent Pinchart
parent 7ed093602e
commit 0a370db816
1 changed files with 5 additions and 1 deletions

View File

@ -585,7 +585,11 @@ 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;
}