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

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Message-ID: <50b564058516f98a211d72b1bd7a0e3b00c674e0.camel@mediatek.com>
Date:   Thu, 3 Nov 2022 05:46:12 +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 Wed, 2022-11-02 at 13:37 +0800, CK Hu wrote:
> 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.

I misunderstanding this patch, so just ignore my comment.

Regards,
CK

> 
> 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);