linux-kernel - Re: [PATCH v6 07/10] drm/bridge: it6505: fix HDCP CTS KSV list read with UNIGRAF DPR-100.

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Message-ID: <rjkks6fqcjxf66rfokz4cawptviotxdcixhqkzalasfph2dno6@iqz2577gkrtb>
Date: Sun, 20 Oct 2024 16:54:27 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Hermes.wu@....com.tw
Cc: Andrzej Hajda <andrzej.hajda@...el.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Pin-yen Lin <treapking@...omium.org>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	Kenneth Hung <Kenneth.hung@....com.tw>, Pet Weng <Pet.Weng@....com.tw>
Subject: Re: [PATCH v6 07/10] drm/bridge: it6505: fix HDCP CTS KSV list read
 with UNIGRAF DPR-100.

On Wed, Oct 16, 2024 at 03:54:19PM +0800, Hermes Wu via B4 Relay wrote:
> From: Hermes Wu <Hermes.wu@....com.tw>
> 
> When running the HDCP CTS test with UNIGRAF DPR-100.
> KSV list must be read from DP_AUX_HDCP_KSV_FIFO in an AUX request,
> and can not separate with multiple read requests.
> 
> The AUX operation command "CMD_AUX_GET_KSV_LIST" reads the KSV list
> with AUX FIFO and is able to read DP_AUX_HDCP_KSV_FIFO in an AUX request.
> 
> Add it6505_get_ksvlist() which uses CMD_AUX_GET_KSV_LIST operation
> to read the KSV list.
> 
> Signed-off-by: Hermes Wu <Hermes.wu@....com.tw>
> ---
>  drivers/gpu/drm/bridge/ite-it6505.c | 48 +++++++++++++++++++++++++++----------
>  1 file changed, 36 insertions(+), 12 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry