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

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Date: Thu, 4 Jan 2024 09:43:17 +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]

> +
> +struct hdcp2_info_rx {
> +	u8 cert[HDCP2_CERTRX_SIZE];
> +	u8 rrx[HDCP2_RRX_SIZE];
> +	u8 rx_caps[HDCP2_RXCAPS_SIZE];
> +	u8 rx_info[HDCP2_RXINFO_SIZE];
> +	u8 ekh_km[HDCP2_EKHKM_SIZE];
> +	u8 v_prime[HDCP2_VPRIME_SIZE];
> +	u8 m_prime[HDCP2_REP_MPRIME_SIZE];
> +	u8 h_prime[HDCP2_HPRIME_SIZE];
> +	u8 l_prime[HDCP2_LPRIME_SIZE];

This is defined in include/drm/display/drm_hdcp.h as struct
hdcp2_lc_send_lprime{}, so I think you could reuse it. Ditto for all
others in hdcp2_info_rx{}.

Regards,
CK

> +	u8 recv_id_list[HDCP2_MAX_DEVICE_COUNT * HDCP2_RECVID_SIZE];
> +	u8 seq_num_v[HDCP2_SEQ_NUM_V_SIZE];
> +};
> +