From patchwork Wed Sep 1 16:03:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 12469789 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8CF04C4320E for ; Wed, 1 Sep 2021 16:26:41 +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 56EBC60E98 for ; Wed, 1 Sep 2021 16:26:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 56EBC60E98 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B132D899E9; Wed, 1 Sep 2021 16:26:40 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id DCA1A89FA6 for ; Wed, 1 Sep 2021 16:26:39 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10094"; a="282512549" X-IronPort-AV: E=Sophos;i="5.84,369,1620716400"; d="scan'208";a="282512549" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2021 09:26:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,369,1620716400"; d="scan'208";a="688431241" Received: from amanna.iind.intel.com ([10.223.74.76]) by fmsmga006.fm.intel.com with ESMTP; 01 Sep 2021 09:26:38 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Cc: Jani Nikula , Imre Deak , Animesh Manna Date: Wed, 1 Sep 2021 21:33:59 +0530 Message-Id: <20210901160402.24816-3-animesh.manna@intel.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20210901160402.24816-1-animesh.manna@intel.com> References: <20210901160402.24816-1-animesh.manna@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 2/5] drm/i915/dp: fix TGL and ICL max source rates 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Jani Nikula Combo phy is limited to 5.4 GHz on low-voltage SKUs. Combo phy DP is limited to 5.4 GHz, while combo phy eDP can do 8.1 GHz. Bspec: 20584, 20598, 49180, 49201 Cc: Imre Deak Signed-off-by: Jani Nikula Signed-off-by: Animesh Manna Reviewed-by: Imre Deak --- drivers/gpu/drm/i915/display/intel_dp.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 7e823c02c1e9..d7486017b7f6 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -291,6 +291,15 @@ static int dg2_max_source_rate(struct intel_dp *intel_dp) return intel_dp_is_edp(intel_dp) ? 810000 : 1350000; } +static bool is_low_voltage_sku(struct drm_i915_private *i915, enum phy phy) +{ + u32 voltage; + + voltage = intel_de_read(i915, ICL_PORT_COMP_DW3(phy)) & VOLTAGE_INFO_MASK; + + return voltage == VOLTAGE_INFO_0_85V; +} + static int icl_max_source_rate(struct intel_dp *intel_dp) { struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); @@ -298,7 +307,7 @@ static int icl_max_source_rate(struct intel_dp *intel_dp) enum phy phy = intel_port_to_phy(dev_priv, dig_port->base.port); if (intel_phy_is_combo(dev_priv, phy) && - !intel_dp_is_edp(intel_dp)) + (is_low_voltage_sku(dev_priv, phy) || !intel_dp_is_edp(intel_dp))) return 540000; return 810000;