[PATCH 06/10] drm/rcar-du/crc: Implement verify_crc_source callback

[Kumar, Mahesh]

Cc: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>


On 6/26/2018 11:52 AM, Mahesh Kumar wrote:
> This patch implements "verify_crc_source" callback function for
> rcar drm driver.
>
> Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
> Cc: dri-devel at lists.freedesktop.org
> ---
>   drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 40 ++++++++++++++++++++++++++++++++++
>   1 file changed, 40 insertions(+)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> index 15dc9caa128b..24eeaa7e14d7 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -756,6 +756,45 @@ static void rcar_du_crtc_disable_vblank(struct drm_crtc *crtc)
>   	rcrtc->vblank_enable = false;
>   }
>   
> +static int rcar_du_crtc_verify_crc_source(struct drm_crtc *crtc,
> +					  const char *source_name,
> +					  size_t *values_cnt)
> +{
> +	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
> +	unsigned int index = 0;
> +	unsigned int i;
> +	int ret;
> +
> +	/*
> +	 * Parse the source name. Supported values are "plane%u" to compute the
> +	 * CRC on an input plane (%u is the plane ID), and "auto" to compute the
> +	 * CRC on the composer (VSP) output.
> +	 */
> +	if (!source_name || !strcmp(source_name, "auto")) {
> +		goto out;
> +	} else if (strstarts(source_name, "plane")) {
> +		ret = kstrtouint(source_name + strlen("plane"), 10, &index);
> +		if (ret < 0)
> +			return ret;
> +
> +		for (i = 0; i < rcrtc->vsp->num_planes; ++i) {
> +			if (index == rcrtc->vsp->planes[i].plane.base.id) {
> +				index = i;
> +				break;
> +			}
> +		}
> +
> +		if (i >= rcrtc->vsp->num_planes)
> +			return -EINVAL;
> +	} else {
> +		return -EINVAL;
> +	}
> +
> +out:
> +	*values_cnt = 1;
> +	return 0;
> +}
> +
>   static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc,
>   				       const char *source_name,
>   				       size_t *values_cnt)
> @@ -861,6 +900,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
>   	.enable_vblank = rcar_du_crtc_enable_vblank,
>   	.disable_vblank = rcar_du_crtc_disable_vblank,
>   	.set_crc_source = rcar_du_crtc_set_crc_source,
> +	.verify_crc_source = rcar_du_crtc_verify_crc_source,
>   };
>   
>   /* -----------------------------------------------------------------------------