From patchwork Thu Oct 22 08:55:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gupta, Anshuman" X-Patchwork-Id: 11850697 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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 F0777C61DD8 for ; Thu, 22 Oct 2020 09:36:58 +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 84E8424248 for ; Thu, 22 Oct 2020 09:36:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84E8424248 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 B876C6F5A7; Thu, 22 Oct 2020 09:36:57 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 690336F5A6; Thu, 22 Oct 2020 09:36:52 +0000 (UTC) IronPort-SDR: HJvBfHXp3UTnVrFZCBIoqKRo7t1u3yqzGUDLSXRKKXNSLQF+j2H9aa0rVa51Yqy6F8TwjICBzE czgdVnEafiHA== X-IronPort-AV: E=McAfee;i="6000,8403,9781"; a="164905597" X-IronPort-AV: E=Sophos;i="5.77,404,1596524400"; d="scan'208";a="164905597" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Oct 2020 02:36:52 -0700 IronPort-SDR: 7dMhrNBBk71dY3eJyQzRuoUhueIPSHP5sOY4ebI1om5FYuNnfsoQscHSI9ASxYhnCMvQOISH9u 2ui7eutzQKZw== X-IronPort-AV: E=Sophos;i="5.77,404,1596524400"; d="scan'208";a="359807547" Received: from genxfsim-desktop.iind.intel.com ([10.223.74.178]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Oct 2020 02:36:49 -0700 From: Anshuman Gupta To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v3 16/16] drm/i915/hdcp: Enable HDCP 2.2 MST support Date: Thu, 22 Oct 2020 14:25:52 +0530 Message-Id: <20201022085552.18353-17-anshuman.gupta@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201022085552.18353-1-anshuman.gupta@intel.com> References: <20201022085552.18353-1-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, 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 2.2 over DP MST. Cc: Ramalingam C Signed-off-by: Anshuman Gupta --- drivers/gpu/drm/i915/display/intel_hdcp.c | 46 ++++++++++++++++++++++- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index 86a3ffadd97f..98225777c9f9 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -1696,6 +1696,32 @@ static int hdcp2_authenticate_sink(struct intel_connector *connector) return ret; } +static int hdcp2_enable_stream_encryption(struct intel_connector *connector) +{ + struct intel_digital_port *dig_port = intel_attached_dig_port(connector); + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_hdcp *hdcp = &connector->hdcp; + enum transcoder cpu_transcoder = hdcp->cpu_transcoder; + enum port port = dig_port->base.port; + int ret = 0; + + if (!(intel_de_read(dev_priv, HDCP2_STATUS(dev_priv, cpu_transcoder, port)) & + LINK_ENCRYPTION_STATUS)) { + drm_err(&dev_priv->drm, "HDCP 2.2 Link is not encrypted\n"); + return -EPERM; + } + + if (hdcp->shim->stream_2_2_encryption) { + ret = hdcp->shim->stream_2_2_encryption(dig_port, true); + if (ret) { + drm_err(&dev_priv->drm, "Failed to enable HDCP 2.2 stream enc\n"); + return ret; + } + } + + return ret; +} + static int hdcp2_enable_encryption(struct intel_connector *connector) { struct intel_digital_port *dig_port = intel_attached_dig_port(connector); @@ -1834,7 +1860,7 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) drm_dbg_kms(&i915->drm, "Port deauth failed.\n"); } - if (!ret) { + if (!ret && !dig_port->port_auth) { /* * Ensuring the required 200mSec min time interval between * Session Key Exchange and encryption. @@ -1849,6 +1875,8 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) } } + ret = hdcp2_enable_stream_encryption(connector); + return ret; } @@ -1893,11 +1921,23 @@ static int _intel_hdcp2_disable(struct intel_connector *connector) struct intel_digital_port *dig_port = intel_attached_dig_port(connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct hdcp_port_data *data = &dig_port->port_data; + struct intel_hdcp *hdcp = &connector->hdcp; int ret; drm_dbg_kms(&i915->drm, "[%s:%d] HDCP2.2 is being Disabled\n", connector->base.name, connector->base.base.id); + if (hdcp->shim->stream_2_2_encryption) { + ret = hdcp->shim->stream_2_2_encryption(dig_port, false); + if (ret) { + drm_err(&i915->drm, "Failed to disable HDCP 2.2 stream enc\n"); + return ret; + } + } + + if (dig_port->num_hdcp_streams > 0) + return ret; + ret = hdcp2_disable_encryption(connector); if (hdcp2_deauthenticate_port(connector) < 0) @@ -1921,6 +1961,7 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) int ret = 0; mutex_lock(&hdcp->mutex); + mutex_lock(&dig_port->hdcp_mutex); cpu_transcoder = hdcp->cpu_transcoder; /* hdcp2_check_link is expected only when HDCP2.2 is Enabled */ @@ -1998,6 +2039,7 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) } out: + mutex_unlock(&dig_port->hdcp_mutex); mutex_unlock(&hdcp->mutex); return ret; } @@ -2179,7 +2221,7 @@ int intel_hdcp_init(struct intel_connector *connector, if (!shim) return -EINVAL; - if (is_hdcp2_supported(dev_priv) && !connector->mst_port) + if (is_hdcp2_supported(dev_priv)) intel_hdcp2_init(connector, dig_port, shim); ret =