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: 404714 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 1ECA4C43381 for ; Wed, 17 Mar 2021 18:49:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0093964F53 for ; Wed, 17 Mar 2021 18:49:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232735AbhCQSt0 (ORCPT ); Wed, 17 Mar 2021 14:49:26 -0400 Received: from mga01.intel.com ([192.55.52.88]:39004 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233100AbhCQStM (ORCPT ); Wed, 17 Mar 2021 14:49:12 -0400 IronPort-SDR: wJSagCQo9JI5sNAPVnOX6Rn/KD4RSeeLYRfBM8hqW+69pi+FSI0Y0Jyp7h+qg2eb6de04VcPXz QCYUQaJF+VTQ== X-IronPort-AV: E=McAfee;i="6000,8403,9926"; a="209499349" X-IronPort-AV: E=Sophos;i="5.81,257,1610438400"; d="scan'208";a="209499349" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.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 Cc: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , stable@vger.kernel.org Subject: [PATCH v2 0/3] drm/i915: Fix DP LTTPR link training mode initialization 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 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 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(-)