[Intel-gfx] i915 HDCP 2.2 TX encryption on Teledyne test instrument
Ramalingam C
ramalingam.c at intel.com
Wed Nov 6 05:12:00 UTC 2019
Moving to #intel-gfx
Hi,
Glad that I could help you!
On 2019-11-05 at 21:56:28 +0000, Voldman, Mikhail wrote:
> Hello Ramalingam,
>
> Thank you for quick response.
> Your information is very helpful.
> But can you elaborate:
>
> In your product, If you want to enable the HDCP always based on the sink capability, set
> the "Content protection" to DESIRED state along with desired content
> type. [MV] should I set DESIRED protection level as DRM master?
This needs additional kernel patch for your product to set the desired
state as default state of the property at the creation.
>
> As these are properties, non DRM Masters can only read them. can set
> them. [MV] do you mean: " non DRM Masters can only read them, but can't set them."
Yes.
> Can I use MEI interface to control HDCP?
Not needed if you set the default state as desired.
-Ram
>
> Mikhail Voldman
> System Architect
>
> Teledyne LeCroy, Protocol Solutions Group
> 2111 Big Timber Road
> Elgin, IL 60123
> Note new email address: mikhail.voldman at teledyne.com
> 847-888-0450 x136
>
> Send me a file securely
>
>
> -----Original Message-----
> From: Ramalingam C <ramalingam.c at intel.com>
> Sent: Monday, November 4, 2019 10:44 PM
> To: Voldman, Mikhail <Mikhail.Voldman at Teledyne.com>
> Cc: Kurmi Suresh Kumar <suresh.kumar.kurmi at intel.com>
> Subject: Re: i915 HDCP 2.2 TX encryption on Teledyne test instrument
>
> ---External Email---
>
> On 2019-11-04 at 20:42:49 +0000, Voldman, Mikhail wrote:
> > Hello Ramalingam,
> >
> > We exchanged number of e-mails few months ago regarding Linux i915 HDCP 2.2 encryption support in the new Teledyne video test instrument.
> > Thanks for your help we were able to control HDCP 2.2 encryption as DRM masters.
> >
> > Unfortunately our product requirement specified than we need to enable HDCP 2.2 always if attached monitor capabilities shows HDCP 2.2 support.
> > Also i915 based TX required to execute HDCP 2.2 re-authentication if Sink HPD is detected.
> >
> > Is current Intel i915 kernel driver implementation can support desired functionality? Do you have plans to support this?
>
> "HDCP always" will never be an upstream solution. always userspace
> driven.
>
> In your product, If you want to enable the HDCP always based on the sink capability, set
> the "Content protection" to DESIRED state along with desired content
> type.
>
> As these are properties, non DRM Masters can only read them. can set
> them.
>
> Hope you are unblocked. All the best!
>
> -Ram
> >
> > Are current i915 allow control HDCP encryption by NOT DRM master application?
> >
> > Any suggestion or advice by Intel HDCP 2.2 experts will be really appreciated.
> >
> > Best Regards,
> >
> > Mikhail Voldman
> > System Architect
> > [cid:image001.gif at 01D2D0A7.919320A0]
> > Teledyne LeCroy, Protocol Solutions Group
> > 2111 Big Timber Road
> > Elgin, IL 60123
> > Note new email address: mikhail.voldman at teledyne.com<mailto:mikhail.voldman at teledyne.com>
> > 847-888-0450 x136
> >
> > Send me a file securely<https://transfereast.teledyne.com/filedrop/mikhail.voldman@teledyne.com>
> >
>
>
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