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From: Ramalingam C <ramalingam.c@intel.com>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	daniel.vetter@ffwll.ch, tomas.winkler@intel.com,
	uma.shankar@intel.com
Subject: [PATCH v12 13/38] drm/i915: Handle HDCP2.2 downstream topology change
Date: Sat,  9 Feb 2019 12:42:42 +0530	[thread overview]
Message-ID: <1549696387-28268-14-git-send-email-ramalingam.c@intel.com> (raw)
In-Reply-To: <1549696387-28268-1-git-send-email-ramalingam.c@intel.com>

When repeater notifies a downstream topology change, this patch
reauthenticate the repeater alone without disabling the hdcp
encryption. If that fails then complete reauthentication is executed.

v2:
  Rebased.
v3:
  Typo in commit msg is fixed [Uma]
v4:
  Rebased as part of patch reordering.
  Minor style fixes.
v5:
  Rebased.
v6:
  Rebased.
v7:
  Errors due to sinks are reported as DEBUG logs.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_hdcp.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 00fae3963caf..fe0445c0eaac 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -1626,8 +1626,24 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
 		goto out;
 	}
 
-	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 link failed, retrying auth\n",
-		      connector->base.name, connector->base.base.id);
+	if (ret == HDCP_TOPOLOGY_CHANGE) {
+		if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+			goto out;
+
+		DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n");
+		ret = hdcp2_authenticate_repeater_topology(connector);
+		if (!ret) {
+			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+			schedule_work(&hdcp->prop_work);
+			goto out;
+		}
+		DRM_DEBUG_KMS("[%s:%d] Repeater topology auth failed.(%d)\n",
+			      connector->base.name, connector->base.base.id,
+			      ret);
+	} else {
+		DRM_DEBUG_KMS("[%s:%d] HDCP2.2 link failed, retrying auth\n",
+			      connector->base.name, connector->base.base.id);
+	}
 
 	ret = _intel_hdcp2_disable(connector);
 	if (ret) {
-- 
2.7.4

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  parent reply	other threads:[~2019-02-09  7:12 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-09  7:12 [PATCH v12 00/38] drm/i915: Implement HDCP2.2 Ramalingam C
2019-02-09  7:12 ` [PATCH v12 01/38] drm/doc: document recommended component helper usage Ramalingam C
2019-02-11  8:31   ` Daniel Vetter
2019-02-12 12:44   ` Laurent Pinchart
2019-02-12 12:52     ` Daniel Vetter
2019-02-09  7:12 ` [PATCH v12 02/38] drm/i915: Gathering the HDCP1.4 routines together Ramalingam C
2019-02-09  7:12 ` [PATCH v12 03/38] drm: header for i915 - MEI_HDCP interface Ramalingam C
2019-02-09  7:12 ` [PATCH v12 04/38] drm/i915: Initialize HDCP2.2 Ramalingam C
2019-02-09  7:12 ` [PATCH v12 05/38] drm/i915: MEI interface definition Ramalingam C
2019-02-09  7:12 ` [PATCH v12 06/38] drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking Ramalingam C
2019-02-09  7:12 ` [PATCH v12 07/38] drm/i915: Enable and Disable of HDCP2.2 Ramalingam C
2019-02-09  7:12 ` [PATCH v12 08/38] drm/i915: Implement HDCP2.2 receiver authentication Ramalingam C
2019-02-09  7:12 ` [PATCH v12 09/38] drm: helper functions for hdcp2 seq_num to from u32 Ramalingam C
2019-02-09  7:12 ` [PATCH v12 10/38] drm/i915: Implement HDCP2.2 repeater authentication Ramalingam C
2019-02-09  7:12 ` [PATCH v12 11/38] drm: HDCP2.2 link check period Ramalingam C
2019-02-09  7:12 ` [PATCH v12 12/38] drm/i915: Implement HDCP2.2 link integrity check Ramalingam C
2019-02-09  7:12 ` Ramalingam C [this message]
2019-02-09  7:12 ` [PATCH v12 14/38] drm: removing the DP Errata msg and its msg id Ramalingam C
2019-02-09  7:12 ` [PATCH v12 15/38] drm/i915: Implement the HDCP2.2 support for DP Ramalingam C
2019-02-09  7:12 ` [PATCH v12 16/38] drm/i915: Implement the HDCP2.2 support for HDMI Ramalingam C
2019-02-09  7:12 ` [PATCH v12 17/38] drm/i915: CP_IRQ handling for DP HDCP2.2 msgs Ramalingam C
2019-02-09  7:12 ` [PATCH v12 18/38] drm/i915: Fix KBL HDCP2.2 encrypt status signalling Ramalingam C
2019-02-09  7:12 ` [PATCH v12 19/38] mei: bus: whitelist hdcp client Ramalingam C
2019-02-09  7:12 ` [PATCH v12 20/38] mei: bus: export to_mei_cl_device for mei client device drivers Ramalingam C
2019-02-09  7:12 ` [PATCH v12 21/38] mei: me: add ice lake point device id Ramalingam C
2019-02-09  7:57   ` Greg KH
2019-02-09  8:23     ` Winkler, Tomas
2019-02-12 13:28   ` Sasha Levin
2019-02-12 13:28   ` Sasha Levin via dri-devel
2019-02-09  7:12 ` [PATCH v12 22/38] misc/mei/hdcp: Client driver for HDCP application Ramalingam C
2019-02-09  7:12 ` [PATCH v12 23/38] misc/mei/hdcp: Define ME FW interface for HDCP2.2 Ramalingam C
2019-02-09  7:12 ` [PATCH v12 24/38] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session Ramalingam C
2019-02-09 16:09   ` Winkler, Tomas
2019-02-10  8:18     ` C, Ramalingam
2019-02-10  8:25       ` Winkler, Tomas
2019-02-10  9:02         ` C, Ramalingam
2019-02-10 19:58           ` Winkler, Tomas
2019-02-11  5:04   ` [PATCH v13 " Ramalingam C
2019-02-09  7:12 ` [PATCH v12 25/38] misc/mei/hdcp: Verify Receiver Cert and prepare km Ramalingam C
2019-02-09  7:12 ` [PATCH v12 26/38] misc/mei/hdcp: Verify H_prime Ramalingam C
2019-02-09  7:12 ` [PATCH v12 27/38] misc/mei/hdcp: Store the HDCP Pairing info Ramalingam C
2019-02-09  7:12 ` [PATCH v12 28/38] misc/mei/hdcp: Initiate Locality check Ramalingam C
2019-02-09  7:12 ` [PATCH v12 29/38] misc/mei/hdcp: Verify L_prime Ramalingam C
2019-02-09  7:12 ` [PATCH v12 30/38] misc/mei/hdcp: Prepare Session Key Ramalingam C
2019-02-09  7:13 ` [PATCH v12 31/38] misc/mei/hdcp: Repeater topology verification and ack Ramalingam C
2019-02-09  7:13 ` [PATCH v12 32/38] misc/mei/hdcp: Verify M_prime Ramalingam C
2019-02-11 18:10   ` Winkler, Tomas
2019-02-09  7:13 ` [PATCH v12 33/38] misc/mei/hdcp: Enabling the HDCP authentication Ramalingam C
2019-02-09  7:13 ` [PATCH v12 34/38] misc/mei/hdcp: Closing wired HDCP2.2 Tx Session Ramalingam C
2019-02-09  7:13 ` [PATCH v12 35/38] misc/mei/hdcp: Component framework for I915 Interface Ramalingam C
2019-02-09  7:13 ` [PATCH v12 36/38] FOR_TEST_ONLY: i915/Kconfig: Select mei_hdcp by I915 Ramalingam C
2019-02-09  7:13 ` [PATCH v12 37/38] FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4 Ramalingam C
2019-02-09  7:13 ` [PATCH v12 38/38] FOR_TESTING_ONLY: ICL: Limit clk to <= 340MHz Ramalingam C
2019-02-09  7:36 ` ✗ Fi.CI.CHECKPATCH: warning for drm/i915: Implement HDCP2.2 Patchwork
2019-02-09  7:46 ` ✗ Fi.CI.SPARSE: " Patchwork
2019-02-09  8:04 ` ✓ Fi.CI.BAT: success " Patchwork
2019-02-09 10:14 ` ✓ Fi.CI.IGT: " Patchwork
2019-02-11  5:36 ` ✗ Fi.CI.CHECKPATCH: warning for drm/i915: Implement HDCP2.2 (rev2) Patchwork
2019-02-11  5:46 ` ✗ Fi.CI.SPARSE: " Patchwork
2019-02-11  5:58 ` ✓ Fi.CI.BAT: success " Patchwork
2019-02-11  8:06 ` ✗ Fi.CI.IGT: failure " Patchwork

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