Hi, Mac:

On Sat, 2024-06-08 at 20:01 +0800, mac.shen wrote:
> Changes in v3:
> - refine the function to get system time
> - refine the flow to do HDCP with content type and
>   protection value which set by user space
> - refine the flow to update content protection
> - refine the flow to do HDCP2.x authentication
> per suggestion from the previous thread:
> https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek__;!!CTRNKA9wMg0ARbw!md6xUiYN88D2YmETs8FQgaExM2zH8S1SmAEU9GRchwpNsXOyDFul3ziVKhRpCJaj8Rcn-gvM-801runjwA$ 
> /patch/20240205055055.25340-3-mac.shen@mediatek.com/
> 
> Signed-off-by: mac.shen <mac.shen@mediatek.com>
> ---

[snip]

> +
> +static int dp_tx_hdcp2x_write_lc_init(struct mtk_hdcp_info *hdcp_info)
> +{
> +	struct mtk_dp *mtk_dp = container_of(hdcp_info, struct mtk_dp, hdcp_info);
> +	ssize_t ret;
> +
> +	dev_dbg(mtk_dp->dev, "[HDCP2.X] HDCP_2_2_LC_INIT\n");
> +
> +	ret = drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_LC_INIT_OFFSET,
> +				hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, HDCP_2_2_RN_LEN);
> +	if (ret < 0)
> +		return ret;
> +
> +	return 0;

This function is called only by dp_tx_hdcp2x_locality_check() and this function just does one thing.
So merge this function into dp_tx_hdcp2x_locality_check().

Regards,
CK

> +}
> +