linux-kernel - Re: [PATCH] drm_bridge: register content protect property

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Date:   Wed, 2 Nov 2022 05:37:53 +0000
From:   CK Hu (胡俊光) <ck.hu@...iatek.com>
To:     "seanpaul@...omium.org" <seanpaul@...omium.org>,
        "dianders@...omium.org" <dianders@...omium.org>,
        "hsinyi@...omium.org" <hsinyi@...omium.org>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tzimmermann@...e.de" <tzimmermann@...e.de>,
        "airlied@...ux.ie" <airlied@...ux.ie>
Subject: Re: [PATCH] drm_bridge: register content protect property

Hi, Hsin-Yi:

On Tue, 2022-10-11 at 18:18 +0800, Hsin-Yi Wang wrote:
> Some bridges are able to update HDCP status from userspace requests
> if
> they support HDCP.
> 
> HDCP property is the same as other connector properties that need to
> be
> created after the connecter is initialized and before the connector
> is
> registered.

So this is anx7625 support HDCP, right?
All connector with anx7625 has this problem, so I think this should be
done in drm core not in each SoC driver.

Regards,
CK

> 
> Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> ---
>  drivers/gpu/drm/drm_bridge_connector.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_bridge_connector.c
> b/drivers/gpu/drm/drm_bridge_connector.c
> index 1c7d936523df5..a3b9ef8dc3f0b 100644
> --- a/drivers/gpu/drm/drm_bridge_connector.c
> +++ b/drivers/gpu/drm/drm_bridge_connector.c
> @@ -7,6 +7,7 @@
>  #include <linux/module.h>
>  #include <linux/slab.h>
>  
> +#include <drm/display/drm_hdcp_helper.h>
>  #include <drm/drm_atomic_state_helper.h>
>  #include <drm/drm_bridge.h>
>  #include <drm/drm_bridge_connector.h>
> @@ -398,6 +399,8 @@ struct drm_connector
> *drm_bridge_connector_init(struct drm_device *drm,
>  	if (panel_bridge)
>  		drm_panel_bridge_set_orientation(connector,
> panel_bridge);
>  
> +	drm_connector_attach_content_protection_property(connector,
> true);
> +
>  	return connector;
>  }
>  EXPORT_SYMBOL_GPL(drm_bridge_connector_init);