From patchwork Tue Apr 3 13:57:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10321237 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 911FB60541 for ; Tue, 3 Apr 2018 14:13:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81A7A2881E for ; Tue, 3 Apr 2018 14:13:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 80774288D7; Tue, 3 Apr 2018 14:13:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 35D9728CEA for ; Tue, 3 Apr 2018 14:12:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2892E6E558; Tue, 3 Apr 2018 14:09:14 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id E41236E553; Tue, 3 Apr 2018 14:09:11 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Apr 2018 07:05:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,401,1517904000"; d="scan'208";a="30681049" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga008.jf.intel.com with ESMTP; 03 Apr 2018 07:05:22 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, seanpaul@chromium.org, daniel@ffwll.ch, chris@chris-wilson.co.uk, jani.nikula@linux.intel.com, tomas.winkler@intel.com, alexander.usyskin@intel.com Date: Tue, 3 Apr 2018 19:27:41 +0530 Message-Id: <1522763873-23041-29-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1522763873-23041-1-git-send-email-ramalingam.c@intel.com> References: <1522763873-23041-1-git-send-email-ramalingam.c@intel.com> Subject: [Intel-gfx] [PATCH v3 28/40] drm/i915: Handle HDCP2.2 downstream topology change X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rodrigo.vivi@intel.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP When repeater notifies a downstream topology change, this patch reauthenticate the repeater alone with out disabling the hdcp encryption. If that fails then complete reauthentication is executed. v2: Rebased. v3: No Changes. Signed-off-by: Ramalingam C Reviewed-by: Uma Shankar --- drivers/gpu/drm/i915/intel_hdcp.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index e2aec73aefe3..fd30e2b1ddc3 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -1497,8 +1497,23 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) goto out; } - DRM_INFO("[%s:%d] HDCP2.2 link failed, retrying authentication\n", - connector->base.name, connector->base.base.id); + if (ret == DRM_HDCP_TOPOLOGY_CHANGE) { + if (hdcp->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->hdcp_value = DRM_MODE_CONTENT_PROTECTION_ENABLED; + schedule_work(&hdcp->hdcp_prop_work); + goto out; + } + DRM_ERROR("[%s:%d] Repeater topology auth failed.(%d)\n", + connector->base.name, connector->base.base.id, ret); + } else { + DRM_ERROR("[%s:%d] HDCP2.2 link failed, retrying auth\n", + connector->base.name, connector->base.base.id); + } ret = _intel_hdcp2_disable(connector); if (ret) {