[PATCH v9 13/39] drm: HDCP2.2 link check related constants

[Daniel Vetter]

On Wed, Dec 19, 2018 at 09:09:00PM +0530, C, Ramalingam wrote:
> 
> On 12/19/2018 8:46 PM, Daniel Vetter wrote:
> > On Thu, Dec 13, 2018 at 09:31:15AM +0530, Ramalingam C wrote:
> > > Enums and macros are defined for HDCP2.2 link check.
> > > 
> > > Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
> > > ---
> > >   include/drm/drm_hdcp.h | 8 ++++++++
> > >   1 file changed, 8 insertions(+)
> > > 
> > > diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
> > > index d8093ecf3ddc..21a128e7020a 100644
> > > --- a/include/drm/drm_hdcp.h
> > > +++ b/include/drm/drm_hdcp.h
> > > @@ -11,6 +11,14 @@
> > >   /* Period of hdcp checks (to ensure we're still authenticated) */
> > >   #define DRM_HDCP_CHECK_PERIOD_MS		(128 * 16)
> > > +#define DRM_HDCP2_CHECK_PERIOD_MS		500
> > This one here is good imo, and has my Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> > 
> > > +
> > > +enum check_link_response {
> > > +	DRM_HDCP_LINK_PROTECTED	= 0,
> > > +	DRM_HDCP_TOPOLOGY_CHANGE,
> > > +	DRM_HDCP_LINK_INTEGRITY_FAILURE,
> > > +	DRM_HDCP_REAUTH_REQUEST
> > > +};
> > But this one here is just a part of the intel_hdcp_shim interface. I think
> > we should put into the intel_drv.h header, and change the return value of
> > the check_2_2_link hook to this enum. I think that would clarify the code
> > a lot. Plus then ofc merge this part into the first patch that uses it.
> 
> daniel,
> 
> this is generic link check results as per the HDCP spec. This could be used
> by any other driver in DRM. Still should i move as local to intel?

Yeah I think makes more sense. intel_hdcp_shim could also be used as
fairly generic hdcp implementation, but right now it isn't. Better to keep
things together that are used together.
-Daniel

> 
> -Ram
> 
> > 
> > With that remaining patches have my ack, too.
> > 
> > Cheers, Daniel
> > 
> > >   /* Shared lengths/masks between HDMI/DVI/DisplayPort */
> > >   #define DRM_HDCP_AN_LEN				8
> > > -- 
> > > 2.7.4
> > > 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch