Re: [PATCH v12 05/10] drm/mediatek: Add MT8195 Embedded DisplayPort driver

[CK Hu <ck.hu@mediatek.com>]

Hi, Bo-Chen:

On Mon, 2022-06-27 at 16:03 +0800, Bo-Chen Chen wrote:
> From: Markus Schneider-Pargmann <msp@baylibre.com>
> 
> This patch adds a embedded displayport driver for the MediaTek mt8195
> SoC.
> 
> It supports the MT8195, the embedded DisplayPort units. It offers
> DisplayPort 1.4 with up to 4 lanes.
> 
> The driver creates a child device for the phy. The child device will
> never exist without the parent being active. As they are sharing a
> register range, the parent passes a regmap pointer to the child so
> that
> both can work with the same register range. The phy driver sets
> device
> data that is read by the parent to get the phy device that can be
> used
> to control the phy properties.
> 
> This driver is based on an initial version by
> Jitao shi <jitao.shi@mediatek.com>
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> [Bo-Chen: Cleanup the drivers and modify comments from reviewers]
> Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
> ---

[snip]

> +
> +static int link_rate_to_mb_per_s(struct mtk_dp *mtk_dp, u32
> linkrate)
> +{
> +	switch (linkrate) {
> +	case DP_LINK_BW_1_62:
> +		return 1620;
> +	case DP_LINK_BW_2_7:
> +		return 2700;
> +	case DP_LINK_BW_5_4:
> +		return 5400;
> +	case DP_LINK_BW_8_1:
> +		return 8100;
> +	default:
> +		drm_err(mtk_dp->drm_dev,
> +			"Implementation error, unknown linkrate %d\n",
> +			linkrate);
> +		return -EINVAL;
> +	}
> +}

It looks like this function is equal to drm_dp_bw_code_to_link_rate(),
so remove this function and use drm_dp_bw_code_to_link_rate().

Regards,
CK