From patchwork Thu Nov 26 07:37:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gupta, Anshuman" X-Patchwork-Id: 11932915 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51FDFC63777 for ; Thu, 26 Nov 2020 07:51:51 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EF130206C0 for ; Thu, 26 Nov 2020 07:51:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EF130206C0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E98F6E855; Thu, 26 Nov 2020 07:51:50 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id EF10E6E84E; Thu, 26 Nov 2020 07:51:42 +0000 (UTC) IronPort-SDR: 4O/yauTHX+zlk4JRm1SmZYMU0czhNAte3mclwJywfYX5/4JECBcVbudWFgmo2Yadp2EOI4WVqj O2cuNJW94Kjw== X-IronPort-AV: E=McAfee;i="6000,8403,9816"; a="152084939" X-IronPort-AV: E=Sophos;i="5.78,371,1599548400"; d="scan'208";a="152084939" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Nov 2020 23:51:42 -0800 IronPort-SDR: D5LEQmf/au8awZ+LeWt1nmOL9WsbznEjUhz4LMSeaOQBtpcgmA5M9o/JqVQ3wT1GeQw6M1Srl9 kZsXeOY9ybGA== X-IronPort-AV: E=Sophos;i="5.78,371,1599548400"; d="scan'208";a="535652504" Received: from genxfsim-desktop.iind.intel.com ([10.223.74.178]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Nov 2020 23:51:39 -0800 From: Anshuman Gupta To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v6 08/18] drm/i915/hdcp: Enable HDCP 1.4 stream encryption Date: Thu, 26 Nov 2020 13:07:12 +0530 Message-Id: <20201126073722.19107-9-anshuman.gupta@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201126073722.19107-1-anshuman.gupta@intel.com> References: <20201126073722.19107-1-anshuman.gupta@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, Karthik B S , uma.shankar@intel.com, seanpaul@chromium.org, Anshuman Gupta , juston.li@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Enable HDCP 1.4 DP MST stream encryption. Enable stream encryption once encryption is enabled on the DP transport driving the link for each stream which has requested encryption. Disable stream encryption for each stream that no longer requires encryption before disabling HDCP encryption on the link. v2: - Added debug print for stream encryption. - Disable the hdcp on port after disabling last stream encryption. v3: - Cosmetic change, removed the value less comment. [Uma] v4: - Split the Gen12 HDCP enablement patch. [Ram] - Add connector details in drm_err. v5: - uniformity for connector detail in DMESG. [Ram] - comments improvement. [Ram] Cc: Ramalingam C Reviewed-by: Uma Shankar Tested-by: Karthik B S Signed-off-by: Anshuman Gupta --- drivers/gpu/drm/i915/display/intel_hdcp.c | 38 +++++++++++++++-------- 1 file changed, 25 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index 6e6465b4ecfa..fce444d69521 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -766,10 +766,17 @@ static int intel_hdcp_auth(struct intel_connector *connector) return -ETIMEDOUT; } - /* - * XXX: If we have MST-connected devices, we need to enable encryption - * on those as well. - */ + /* DP MST Auth Part 1 Step 2.a and Step 2.b */ + if (shim->stream_encryption) { + ret = shim->stream_encryption(connector, true); + if (ret) { + drm_err(&dev_priv->drm, "[%s:%d] Failed to enable HDCP 1.4 stream enc\n", + connector->base.name, connector->base.base.id); + return ret; + } + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encrypted\n", + transcoder_name(hdcp->stream_transcoder)); + } if (repeater_present) return intel_hdcp_auth_downstream(connector); @@ -791,18 +798,23 @@ static int _intel_hdcp_disable(struct intel_connector *connector) drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n", connector->base.name, connector->base.base.id); + if (hdcp->shim->stream_encryption) { + ret = hdcp->shim->stream_encryption(connector, false); + if (ret) { + drm_err(&dev_priv->drm, "[%s:%d] Failed to disable HDCP 1.4 stream enc\n", + connector->base.name, connector->base.base.id); + return ret; + } + drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s stream encryption disabled\n", + transcoder_name(hdcp->stream_transcoder)); + } + /* - * If there are other connectors on this port using HDCP, don't disable - * it. Instead, toggle the HDCP signalling off on that particular - * connector/pipe and exit. + * If there are other connectors on this port using HDCP, don't disable it + * until it disabled HDCP encryption for all connectors in MST topology. */ - if (dig_port->num_hdcp_streams > 0) { - ret = hdcp->shim->toggle_signalling(dig_port, - cpu_transcoder, false); - if (ret) - DRM_ERROR("Failed to disable HDCP signalling\n"); + if (dig_port->num_hdcp_streams > 0) return ret; - } hdcp->hdcp_encrypted = false; intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder, port), 0);