From patchwork Wed Mar 17 18:48:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 12146777 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 3C745C433E0 for ; Wed, 17 Mar 2021 18:49:09 +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 CB77B64F04 for ; Wed, 17 Mar 2021 18:49:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CB77B64F04 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 3C6C16E067; Wed, 17 Mar 2021 18:49:08 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 56DC16E067 for ; Wed, 17 Mar 2021 18:49:06 +0000 (UTC) IronPort-SDR: Jq+2nZ7v5ODbRMwITl+BgUOX/tg515HkArMtrH6AdaF5tlDA/zW2LQuOZDeQpmnm8Ek+gcsDKe KVBi+8HZn2HQ== X-IronPort-AV: E=McAfee;i="6000,8403,9926"; a="253537465" X-IronPort-AV: E=Sophos;i="5.81,257,1610438400"; d="scan'208";a="253537465" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2021 11:49:05 -0700 IronPort-SDR: El5N0F38OB5gA9/Zy+oj9TKOhuyGp1TOEfgTj+IDCJ1CE1Ta5u4pJ43iOUZXNCAj7NycvKzlxC pNaQ7DxAOqUw== X-IronPort-AV: E=Sophos;i="5.81,257,1610438400"; d="scan'208";a="511828503" Received: from ideak-desk.fi.intel.com ([10.237.68.141]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2021 11:49:04 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Wed, 17 Mar 2021 20:48:58 +0200 Message-Id: <20210317184901.4029798-1-imre.deak@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 0/3] drm/i915: Fix DP LTTPR link training mode initialization 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: stable@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This is v2 of https://patchwork.freedesktop.org/series/88015/ also making sure that LTTPRs are detected and initialized only if the DPCD and LTTPR revisions are > 1.4 as required by Display Port specification. Cc: Ville Syrjälä Cc: # v5.11 Imre Deak (3): drm/i915/ilk-glk: Fix link training on links with LTTPRs drm/i915: Disable LTTPR support when the DPCD rev < 1.4 drm/i915: Disable LTTPR support when the LTTPR rev < 1.4 drivers/gpu/drm/i915/display/intel_dp.c | 4 +- drivers/gpu/drm/i915/display/intel_dp_aux.c | 7 ++ .../drm/i915/display/intel_dp_link_training.c | 66 ++++++++++++++----- .../drm/i915/display/intel_dp_link_training.h | 2 +- 4 files changed, 58 insertions(+), 21 deletions(-) Tested-by: Zephaniah E. Loss-Cutler-Hull Acked-By: Zephaniah E. Loss-Cutler-Hull