linux-kernel - Re: [Intel-gfx] [PATCH v3 3/9] drm: Add Content Protection property

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Message-ID: <151248844776.700.752575830165346316@mail.alporthouse.com>
Date:   Tue, 05 Dec 2017 15:40:47 +0000
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Daniel Vetter <daniel@...ll.ch>,
        "Sean Paul" <seanpaul@...omium.org>
Cc:     seanpaul@...gle.com, "David Airlie" <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, daniel.vetter@...el.com
Subject: Re: [Intel-gfx] [PATCH v3 3/9] drm: Add Content Protection property

Quoting Daniel Vetter (2017-12-05 15:34:36)
> Two bits missing imo:
> - Should explain that userspace should poll this property to detect a
>   change from ENABLED to DESIRED (and take adequate actions and e.g. stop
>   the stream). No uevent will be sent out because the HDCP specs require
>   polling anyway.

What's more polling than poll()? :-p
-Chris