From patchwork Wed Feb 12 10:29:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 11378255 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 90F88109A for ; Wed, 12 Feb 2020 10:29:47 +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 79D272082F for ; Wed, 12 Feb 2020 10:29:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 79D272082F 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 66D446F4B2; Wed, 12 Feb 2020 10:29:36 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 684D76F4AB; Wed, 12 Feb 2020 10:29:34 +0000 (UTC) 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/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 02:29:34 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="434000940" Received: from ramaling-i9x.iind.intel.com ([10.99.66.154]) by fmsmga006.fm.intel.com with ESMTP; 12 Feb 2020 02:29:32 -0800 From: Ramalingam C To: intel-gfx , dri-devel Subject: [PATCH v2 4/5] drm/i915: dont retry stream management at seq_num_m roll over Date: Wed, 12 Feb 2020 15:59:41 +0530 Message-Id: <20200212102942.26568-5-ramalingam.c@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200212102942.26568-1-ramalingam.c@intel.com> References: <20200212102942.26568-1-ramalingam.c@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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" When roll over detected for seq_num_m, we shouldn't continue with stream management with rolled over value. So we are terminating the stream management retry, on roll over of the seq_num_m. v2: using drm_dbg_kms instead of DRM_DEBUG_KMS [Anshuman] v3: dev_priv is used as i915 [JaniN] Signed-off-by: Ramalingam C Reviewed-by: Anshuman Gupta Tested-by: Anshuman Gupta Reviewed-by: Sean Paul --- drivers/gpu/drm/i915/display/intel_hdcp.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index b24d12efae0a..b35f50d4a0e9 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -1419,11 +1419,6 @@ int _hdcp2_propagate_stream_management_info(struct intel_connector *connector) err_exit: hdcp->seq_num_m++; - if (hdcp->seq_num_m > HDCP_2_2_SEQ_NUM_MAX) { - DRM_DEBUG_KMS("seq_num_m roll over.\n"); - ret = -1; - } - return ret; } @@ -1618,8 +1613,11 @@ hdcp2_propagate_stream_management_info(struct intel_connector *connector) for (i = 0; i < tries; i++) { ret = _hdcp2_propagate_stream_management_info(connector); - if (!ret) + if (!ret || connector->hdcp.seq_num_m > HDCP_2_2_SEQ_NUM_MAX) { + if (connector->hdcp.seq_num_m > HDCP_2_2_SEQ_NUM_MAX) + drm_dbg_kms(&i915->drm, "seq_num_m roll over.\n"); break; + } drm_dbg_kms(&i915->drm, "HDCP2 stream management %d of %d Failed.(%d)\n",