From: Ramalingam C <ramalingam.c@intel.com>
To: Sean Paul <seanpaul@chromium.org>,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Cc: seanpaul@google.com, David Airlie <airlied@linux.ie>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
linux-kernel@vger.kernel.org,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
daniel.vetter@intel.com
Subject: Re: [PATCH v3 9/9] drm/i915: Implement HDCP for DisplayPort
Date: Tue, 5 Dec 2017 20:00:57 +0530 [thread overview]
Message-ID: <49e69878-1fcf-1d46-218c-28cae11c7def@intel.com> (raw)
In-Reply-To: <20171205051513.8603-10-seanpaul@chromium.org>
On Tuesday 05 December 2017 10:45 AM, Sean Paul wrote:
> +static
> +bool intel_dp_hdcp_check_link(struct intel_digital_port *intel_dig_port)
> +{
> + ssize_t ret;
> + u8 bstatus;
> + ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BSTATUS,
> + &bstatus, 1);
> + if (ret != 1) {
> + DRM_ERROR("Read bstatus from DP/AUX failed (%ld)\n", ret);
> + return ret >= 0 ? -EIO : ret;
> + }
> + return !(bstatus & DP_BSTATUS_LINK_FAILURE);
> +}
as per link integrity check should cover other indication from the
repeater like
REAUTHENTICATION_REQUEST - request for reauth due to unauthenticated
state at downstream for some unknown reason
-Ram
next prev parent reply other threads:[~2017-12-05 14:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-05 5:14 [PATCH v3 0/9] drm/i915: Implement HDCP Sean Paul
2017-12-05 5:15 ` [PATCH v3 1/9] drm: Fix link-status kerneldoc line lengths Sean Paul
2017-12-05 5:15 ` [PATCH v3 2/9] drm/i915: Add more control to wait_for routines Sean Paul
2017-12-05 17:13 ` Daniel Vetter
2017-12-05 23:09 ` [Intel-gfx] " Chris Wilson
2017-12-05 5:15 ` [PATCH v3 3/9] drm: Add Content Protection property Sean Paul
2017-12-05 8:07 ` Hans Verkuil
2017-12-05 15:27 ` [Intel-gfx] " Daniel Vetter
2017-12-05 15:34 ` Daniel Vetter
2017-12-05 15:40 ` [Intel-gfx] " Chris Wilson
2017-12-05 5:15 ` [PATCH v3 4/9] drm: Add some HDCP related #defines Sean Paul
2017-12-05 23:12 ` [Intel-gfx] " Chris Wilson
2017-12-06 15:01 ` Alex Deucher
2017-12-05 5:15 ` [PATCH v3 5/9] drm/i915: Add HDCP framework + base implementation Sean Paul
2017-12-05 9:06 ` Ramalingam C
2017-12-05 17:00 ` Daniel Vetter
2017-12-05 5:15 ` [PATCH v3 6/9] drm/i915: Make use of indexed write GMBUS feature Sean Paul
2017-12-05 17:01 ` [Intel-gfx] " Daniel Vetter
2017-12-05 17:33 ` Ville Syrjälä
2017-12-05 5:15 ` [PATCH v3 7/9] drm/i915: Add function to output Aksv over GMBUS Sean Paul
2017-12-05 17:02 ` [Intel-gfx] " Daniel Vetter
2017-12-05 5:15 ` [PATCH v3 8/9] drm/i915: Implement HDCP for HDMI Sean Paul
2017-12-05 17:06 ` Daniel Vetter
2017-12-05 5:15 ` [PATCH v3 9/9] drm/i915: Implement HDCP for DisplayPort Sean Paul
2017-12-05 14:30 ` Ramalingam C [this message]
2017-12-05 17:12 ` Daniel Vetter
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