linux-kernel - Re: [PATCH] drm/mediatek/dp: Add the HDCP feature for DisplayPort

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Message-ID: <73674f38c33051c0dac151e9fe0cdac02198b4bb.camel@mediatek.com>
Date: Tue, 19 Dec 2023 01:59:46 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: Mac Shen (沈俊) <Mac.Shen@...iatek.com>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
	Jitao Shi (石记涛) <jitao.shi@...iatek.com>,
	"daniel@...ll.ch" <daniel@...ll.ch>, "p.zabel@...gutronix.de"
	<p.zabel@...gutronix.de>, "airlied@...il.com" <airlied@...il.com>,
	"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
	"angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>
CC: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>,
	Shuijing Li (李水静) <Shuijing.Li@...iatek.com>
Subject: Re: [PATCH] drm/mediatek/dp: Add the HDCP feature for DisplayPort

Hi, Mac:

On Fri, 2023-11-24 at 16:53 +0800, mac.shen wrote:
> Add tee client application, HDCP 1.x and 2.x authentication for
> DisplayPort
> to support the HDCP feature.
> 
> Signed-off-by: mac.shen <mac.shen@...iatek.com>
> 

[snip]

> +
> +static void mhal_dp_tx_hdcp1x_set_repeater(struct mtk_hdcp_info
> *hdcp_info, bool enable)
> +{
> +	if (enable)
> +		mtk_dp_reg_update_bits(hdcp_info->regs,
> MTK_DP_TRANS_P0_34A4, BIT(15), BIT(15));
> +	else
> +		mtk_dp_reg_update_bits(hdcp_info->regs,
> MTK_DP_TRANS_P0_34A4, 0,  BIT(15));
> +
> +#ifdef IF_ZERO
> +	if (hdcp_info->hdcp1x_info.repeater) {
> +		u8 temp;
> +
> +		temp = BIT(0); /* REAUTHENTICATION_ENABLE_IRQ_HPD */
> +		drm_dp_dpcd_write(hdcp_info->aux, DPCD_6803B, &temp,
> 1);
> +	}
> +#endif

IF_ZERO is not defined, so remove these.

Regards,
CK

> +}
> +