From patchwork Thu Jul 8 21:18:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Souza, Jose" X-Patchwork-Id: 12366261 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=-17.0 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 BD809C07E96 for ; Thu, 8 Jul 2021 21:14:32 +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 8F6B4613FD for ; Thu, 8 Jul 2021 21:14:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8F6B4613FD 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 A06E56E9B8; Thu, 8 Jul 2021 21:14:26 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id CFC946E9AB for ; Thu, 8 Jul 2021 21:14:23 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10039"; a="207775059" X-IronPort-AV: E=Sophos;i="5.84,225,1620716400"; d="scan'208";a="207775059" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jul 2021 14:14:21 -0700 X-IronPort-AV: E=Sophos;i="5.84,225,1620716400"; d="scan'208";a="560755470" Received: from josouza-mobl2.jf.intel.com (HELO josouza-mobl2.intel.com) ([10.24.14.59]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jul 2021 14:14:21 -0700 From: =?utf-8?q?Jos=C3=A9_Roberto_de_Souza?= To: intel-gfx@lists.freedesktop.org Date: Thu, 8 Jul 2021 14:18:24 -0700 Message-Id: <20210708211827.288601-4-jose.souza@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210708211827.288601-1-jose.souza@intel.com> References: <20210708211827.288601-1-jose.souza@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 4/7] drm/i915: Limit maximum number of memory channels 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" Alderlake-P PCODE is returning 4 memory channels while it has a maximum of 2. So adding this limit and printing a debug message but the real fix will need to come from PCODE. HSDES: 22013272110 Signed-off-by: José Roberto de Souza --- drivers/gpu/drm/i915/intel_dram.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dram.c b/drivers/gpu/drm/i915/intel_dram.c index 879b0f007be31..de1d426627ef1 100644 --- a/drivers/gpu/drm/i915/intel_dram.c +++ b/drivers/gpu/drm/i915/intel_dram.c @@ -467,6 +467,10 @@ static int icl_pcode_read_mem_global_info(struct drm_i915_private *dev_priv) } dram_info->num_channels = (val & 0xf0) >> 4; + if (dram_info->num_channels > 2) { + drm_info(&dev_priv->drm, "More DRAM channels than expected, setting to max.\n"); + dram_info->num_channels = 2; + } dram_info->num_qgv_points = (val & 0xf00) >> 8; return 0;