linux-kernel - Re: [PATCH] drm/bridge:anx7625: Update HDCP status at atomic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAEXTbpe=3mN-wCJGRVe7SSbzr5J=zFhWOF30jm5HH4cN_GyK_w@mail.gmail.com>
Date: Wed, 27 Nov 2024 12:43:02 +0800
From: Pin-yen Lin <treapking@...omium.org>
To: Xin Ji <xji@...logixsemi.com>
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>, 
	bliang@...logixsemi.com, qwen@...logixsemi.com, treapking@...gle.com, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/bridge:anx7625: Update HDCP status at atomic_disable()

On Wed, Nov 27, 2024 at 11:02 AM Xin Ji <xji@...logixsemi.com> wrote:
>
> Update HDCP content_protection to DRM_MODE_CONTENT_PROTECTION_UNDESIRED
> in bridge .atomic_disable().
>
> Signed-off-by: Xin Ji <xji@...logixsemi.com>

Tested-by: Pin-yen Lin <treapking@...omium.org>
> ---
>  drivers/gpu/drm/bridge/analogix/anx7625.c | 25 ++++++++++++++++++-----
>  1 file changed, 20 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index a2675b121fe4..a75f519ddcb8 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -861,6 +861,22 @@ static int anx7625_hdcp_disable(struct anx7625_data *ctx)
>                                  TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF);
>  }
>
> +static void anx7625_hdcp_disable_and_update_cp(struct anx7625_data *ctx)
> +{
> +       struct device *dev = ctx->dev;
> +
> +       if (!ctx->connector)
> +               return;
> +
> +       anx7625_hdcp_disable(ctx);
> +
> +       ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
> +       drm_hdcp_update_content_protection(ctx->connector,
> +                                          ctx->hdcp_cp);
> +
> +       dev_dbg(dev, "update CP to UNDESIRE\n");
> +}
> +
>  static int anx7625_hdcp_enable(struct anx7625_data *ctx)
>  {
>         u8 bcap;
> @@ -2165,11 +2181,8 @@ static int anx7625_connector_atomic_check(struct anx7625_data *ctx,
>                         dev_err(dev, "current CP is not ENABLED\n");
>                         return -EINVAL;
>                 }
> -               anx7625_hdcp_disable(ctx);
> -               ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
> -               drm_hdcp_update_content_protection(ctx->connector,
> -                                                  ctx->hdcp_cp);
> -               dev_dbg(dev, "update CP to UNDESIRE\n");
> +
> +               anx7625_hdcp_disable_and_update_cp(ctx);
>         }
>
>         if (cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
> @@ -2449,6 +2462,8 @@ static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge,
>
>         dev_dbg(dev, "drm atomic disable\n");
>
> +       anx7625_hdcp_disable_and_update_cp(ctx);
> +
>         ctx->connector = NULL;
>         anx7625_dp_stop(ctx);
>