From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 50FCDC4361B for ; Fri, 11 Dec 2020 06:59:02 +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 0D23D23F2A for ; Fri, 11 Dec 2020 06:59:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0D23D23F2A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E59C26EC57; Fri, 11 Dec 2020 06:59:00 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 35B306EC57; Fri, 11 Dec 2020 06:58:59 +0000 (UTC) IronPort-SDR: yJd5NSifnqt2rLYjRVC2DVzykf4eOvdPcO5LY38BKLPJ6jJUjijCpus12D+Z/EENZeFirX78Yp MsvlzsvjhrgQ== X-IronPort-AV: E=McAfee;i="6000,8403,9831"; a="173624969" X-IronPort-AV: E=Sophos;i="5.78,410,1599548400"; d="scan'208";a="173624969" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Dec 2020 22:58:59 -0800 IronPort-SDR: 8TWDQJuRCsio8JbCqx0caDRf7pNUXVa43ff1aZWfm7gtRZyTLXHpzJPy/3FRKMnmLKOxOua6vp 5DjqitJsVUJA== X-IronPort-AV: E=Sophos;i="5.78,410,1599548400"; d="scan'208";a="440549871" Received: from ramaling-i9x.iind.intel.com (HELO intel.com) ([10.99.66.154]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Dec 2020 22:58:56 -0800 Date: Fri, 11 Dec 2020 12:28:45 +0530 From: Ramalingam C To: Anshuman Gupta Message-ID: <20201211065844.GD1297@intel.com> References: <20201210062640.11783-1-anshuman.gupta@intel.com> <20201210062640.11783-15-anshuman.gupta@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201210062640.11783-15-anshuman.gupta@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Subject: Re: [Intel-gfx] [PATCH v7 14/18] drm/i915/hdcp: MST streams support in hdcp port_data X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, seanpaul@chromium.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On 2020-12-10 at 11:56:36 +0530, Anshuman Gupta wrote: > Add support for multiple mst stream in hdcp port data > which will be used by RepeaterAuthStreamManage msg and > HDCP 2.2 security f/w for m' validation. > > Security f/w doesn't have any provision to mark the > stream_type for each stream separately, it just take > single input of stream_type while authenticating the > port. ".. authenticating the port and applies the same stream type to all ports" > So driver mark each stream_type with common > highest supported content type for all streams in > DP MST Topology. > > Security f/w supports RepeaterAuthStreamManage msg and m' You could add "though it is not mandatory" > validation only once during port authentication and encryption. > Ideally it should support dynamic update of content_type > and should support RepeaterAuthStreamManage msg and m' validation > whenever required. > > v2: > - Init the hdcp port data k for HDMI/DP SST stream. > v3: > - Cosmetic changes. [Uma] > v4: > - 's/port_auth/hdcp_port_auth'. [Ram] > - Commit log improvement. > v5: > - Comment and commit log improvement. [Ram] > > Cc: Ramalingam C > Reviewed-by: Uma Shankar > Tested-by: Karthik B S > Signed-off-by: Anshuman Gupta > --- > .../drm/i915/display/intel_display_types.h | 4 +- > drivers/gpu/drm/i915/display/intel_hdcp.c | 113 +++++++++++++++--- > 2 files changed, 102 insertions(+), 15 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h > index b74c10c8b01c..b37a02a73de6 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -1502,10 +1502,12 @@ struct intel_digital_port { > enum phy_fia tc_phy_fia; > u8 tc_phy_fia_idx; > > - /* protects num_hdcp_streams reference count, hdcp_port_data */ > + /* protects num_hdcp_streams reference count, hdcp_port_data and hdcp_auth_status */ > struct mutex hdcp_mutex; > /* the number of pipes using HDCP signalling out of this port */ > unsigned int num_hdcp_streams; > + /* port HDCP auth status */ > + bool hdcp_auth_status; > /* HDCP port data need to pass to security f/w */ > struct hdcp_port_data hdcp_port_data; > > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c > index 2bec26123a05..c21a6a6c545c 100644 > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c > @@ -26,6 +26,74 @@ > #define KEY_LOAD_TRIES 5 > #define HDCP2_LC_RETRY_CNT 3 > > +static int intel_conn_to_vcpi(struct intel_connector *connector) > +{ > + /* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */ > + return connector->port ? connector->port->vcpi.vcpi : 0; > +} > + > +/* > + * intel_hdcp_required_content_stream select most highest common possible HDCP selects the most > + * content_type for all streams in DP MST topology because security f/w doesn't > + * have any provision to mark content_type for each stream separately, it marks > + * all available streams with the content_type proivided at the time of port > + * authentication. This may prohibit the userspace to use type1 content on > + * HDCP 2.2 capable sink because of other sink are not capable of HDCP 2.2 in > + * DP MST topology. Ideally security f/w should change its policy to mark Though it is not compulsary, security fw should > + * different content_type for different streams. content types with these addressed LGTM. Reviewed-by: Ramalingam C > + */ > +static int > +intel_hdcp_required_content_stream(struct intel_digital_port *dig_port) > +{ > + struct drm_connector_list_iter conn_iter; > + struct intel_digital_port *conn_dig_port; > + struct intel_connector *connector; > + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); > + struct hdcp_port_data *data = &dig_port->hdcp_port_data; > + bool enforce_type0 = false; > + int k; > + > + if (dig_port->hdcp_auth_status) > + return 0; > + > + drm_connector_list_iter_begin(&i915->drm, &conn_iter); > + for_each_intel_connector_iter(connector, &conn_iter) { > + if (!intel_encoder_is_mst(intel_attached_encoder(connector))) > + continue; > + > + conn_dig_port = intel_attached_dig_port(connector); > + if (conn_dig_port != dig_port) > + continue; > + > + if (connector->base.status == connector_status_disconnected) > + continue; > + > + if (!enforce_type0 && !intel_hdcp2_capable(connector)) > + enforce_type0 = true; > + > + data->streams[data->k].stream_id = intel_conn_to_vcpi(connector); > + data->k++; > + > + /* if there is only one active stream */ > + if (dig_port->dp.active_mst_links <= 1) > + break; > + } > + drm_connector_list_iter_end(&conn_iter); > + > + if (drm_WARN_ON(&i915->drm, data->k > INTEL_NUM_PIPES(i915) || data->k == 0)) > + return -EINVAL; > + > + /* > + * Apply common protection level across all streams in DP MST Topology. > + * Use highest supported content type for all streams in DP MST Topology. > + */ > + for (k = 0; k < data->k; k++) > + data->streams[k].stream_type = > + enforce_type0 ? DRM_MODE_HDCP_CONTENT_TYPE0 : DRM_MODE_HDCP_CONTENT_TYPE1; > + > + return 0; > +} > + > static > bool intel_hdcp_is_ksv_valid(u8 *ksv) > { > @@ -1471,13 +1539,14 @@ static > int _hdcp2_propagate_stream_management_info(struct intel_connector *connector) > { > struct intel_digital_port *dig_port = intel_attached_dig_port(connector); > + struct hdcp_port_data *data = &dig_port->hdcp_port_data; > struct intel_hdcp *hdcp = &connector->hdcp; > union { > struct hdcp2_rep_stream_manage stream_manage; > struct hdcp2_rep_stream_ready stream_ready; > } msgs; > const struct intel_hdcp_shim *shim = hdcp->shim; > - int ret; > + int ret, streams_size_delta, i; > > if (connector->hdcp.seq_num_m > HDCP_2_2_SEQ_NUM_MAX) > return -ERANGE; > @@ -1486,16 +1555,18 @@ int _hdcp2_propagate_stream_management_info(struct intel_connector *connector) > msgs.stream_manage.msg_id = HDCP_2_2_REP_STREAM_MANAGE; > drm_hdcp_cpu_to_be24(msgs.stream_manage.seq_num_m, hdcp->seq_num_m); > > - /* K no of streams is fixed as 1. Stored as big-endian. */ > - msgs.stream_manage.k = cpu_to_be16(1); > + msgs.stream_manage.k = cpu_to_be16(data->k); > > - /* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */ > - msgs.stream_manage.streams[0].stream_id = 0; > - msgs.stream_manage.streams[0].stream_type = hdcp->content_type; > + for (i = 0; i < data->k; i++) { > + msgs.stream_manage.streams[i].stream_id = data->streams[i].stream_id; > + msgs.stream_manage.streams[i].stream_type = data->streams[i].stream_type; > + } > > + streams_size_delta = (HDCP_2_2_MAX_CONTENT_STREAMS_CNT - data->k) * > + sizeof(struct hdcp2_streamid_type); > /* Send it to Repeater */ > ret = shim->write_2_2_msg(dig_port, &msgs.stream_manage, > - sizeof(msgs.stream_manage)); > + sizeof(msgs.stream_manage) - streams_size_delta); > if (ret < 0) > goto out; > > @@ -1504,8 +1575,7 @@ int _hdcp2_propagate_stream_management_info(struct intel_connector *connector) > if (ret < 0) > goto out; > > - dig_port->hdcp_port_data.seq_num_m = hdcp->seq_num_m; > - dig_port->hdcp_port_data.streams[0].stream_type = hdcp->content_type; > + data->seq_num_m = hdcp->seq_num_m; > > ret = hdcp2_verify_mprime(connector, &msgs.stream_ready); > > @@ -1666,6 +1736,7 @@ static int hdcp2_enable_encryption(struct intel_connector *connector) > port), > LINK_ENCRYPTION_STATUS, > HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS); > + dig_port->hdcp_auth_status = true; > > return ret; > } > @@ -1740,11 +1811,9 @@ static int hdcp2_authenticate_and_encrypt(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->hdcp_port_data; > - struct intel_hdcp *hdcp = &connector->hdcp; > - int ret, i, tries = 3; > + int ret = 0, i, tries = 3; > > - for (i = 0; i < tries; i++) { > + for (i = 0; i < tries && !dig_port->hdcp_auth_status; i++) { > ret = hdcp2_authenticate_sink(connector); > if (!ret) { > ret = hdcp2_propagate_stream_management_info(connector); > @@ -1754,7 +1823,7 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) > ret); > break; > } > - data->streams[0].stream_type = hdcp->content_type; > + > ret = hdcp2_authenticate_port(connector); > if (!ret) > break; > @@ -1789,7 +1858,9 @@ static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector) > > static int _intel_hdcp2_enable(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->hdcp_port_data; > struct intel_hdcp *hdcp = &connector->hdcp; > int ret; > > @@ -1797,6 +1868,16 @@ static int _intel_hdcp2_enable(struct intel_connector *connector) > connector->base.name, connector->base.base.id, > hdcp->content_type); > > + /* Stream which requires encryption */ > + if (!intel_encoder_is_mst(intel_attached_encoder(connector))) { > + data->k = 1; > + data->streams[0].stream_type = hdcp->content_type; > + } else { > + ret = intel_hdcp_required_content_stream(dig_port); > + if (ret) > + return ret; > + } > + > ret = hdcp2_authenticate_and_encrypt(connector); > if (ret) { > drm_dbg_kms(&i915->drm, "HDCP2 Type%d Enabling Failed. (%d)\n", > @@ -1814,7 +1895,9 @@ static int _intel_hdcp2_enable(struct intel_connector *connector) > > 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->hdcp_port_data; > int ret; > > drm_dbg_kms(&i915->drm, "[%s:%d] HDCP2.2 is being Disabled\n", > @@ -1826,6 +1909,8 @@ static int _intel_hdcp2_disable(struct intel_connector *connector) > drm_dbg_kms(&i915->drm, "Port deauth failed.\n"); > > connector->hdcp.hdcp2_encrypted = false; > + dig_port->hdcp_auth_status = false; > + data->k = 0; > > return ret; > } > -- > 2.26.2 > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx