From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3A8CEC5320E for ; Mon, 19 Aug 2024 09:14:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 01A6310E229; Mon, 19 Aug 2024 09:14:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="i0rtgDmo"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id EA4C110E228 for ; Mon, 19 Aug 2024 09:14:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724058868; x=1755594868; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=bTW98F1WxyTHIGiBrq6U9EFFXG5UgDykH4UhyZEKfHw=; b=i0rtgDmoG4ySfwq0XAxf58k/nSq0vDV8umirB/zg/pM/89WwHeg8iwtN KrVUWvBW+0y7zDdAtd0Y7YO5D3fNh961TdKFqhmUVB6FpN6UMS0bz0v5r VG9Axz92wjxeje56LUbD3lOdIlZqQC0b+Wlo5T2GqC1RDK1f5mG+yfhKm RukkyXblUziXLbEhnEdt7k8rh1JybTYj362HuMrC7MPq3xd1f00QhSE8n aOw7GU6WFpLqKH/ycaER64NJNGv+7SrQSRITuuZ0372iaBeRNwg3nMsxI Qn8XMTO89ytE+yVuadfHCiZWsqDlFTvK0rSS9YQo0NF0k7mKWn9k/1aZk A==; X-CSE-ConnectionGUID: npT6CYASQXuw4X/x/cRAvg== X-CSE-MsgGUID: /UqLW0kOQWmwFpMpmpa2IQ== X-IronPort-AV: E=McAfee;i="6700,10204,11168"; a="44816316" X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="44816316" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2024 02:14:28 -0700 X-CSE-ConnectionGUID: /1Lj64H5Svm9gI2bjkkeKA== X-CSE-MsgGUID: lZG/uaAjRo2QwHQIhCnGHw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="60884177" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2024 02:14:26 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: imre.deak@intel.com, Kunal Joshi Subject: [PATCH i-g-t 06/12] lib/igt_kms: add function to check if retrain disabled Date: Mon, 19 Aug 2024 14:56:09 +0530 Message-Id: <20240819092615.3669803-7-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240819092615.3669803-1-kunal1.joshi@intel.com> References: <20240819092615.3669803-1-kunal1.joshi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" add helper to check if retraining is disabled, retraining will be disable if we are at the lowest link parameters or the lowest mode supported on a panel Signed-off-by: Kunal Joshi --- lib/igt_kms.c | 24 ++++++++++++++++++++++++ lib/igt_kms.h | 1 + 2 files changed, 25 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index f6ee7ab2e..1caf9df6e 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6978,3 +6978,27 @@ void igt_force_lt_failure(int drm_fd, igt_output_t *output, int failure_count) value, sizeof(value)); close(dir); } + +/** + * igt_get_dp_link_retrain_disabled: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * Returns: True if link retrain disabled, false otherwise + */ +bool igt_get_dp_link_retrain_disabled(int drm_fd, igt_output_t *output) +{ + int dir, res; + char buf[512]; + + igt_require_f(output->name, "Invalid output"); + dir = igt_debugfs_connector_dir(drm_fd, output->name, O_RDONLY); + igt_assert_f(dir >= 0, "Failed to open debugfs dir for connector %s\n", + igt_output_name(output)); + res = igt_debugfs_simple_read(dir, + "i915_dp_link_retrain_disabled", + buf, sizeof(buf)); + close(dir); + igt_require(res > 0); + return strstr(buf, "yes"); +} diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 43bfd4a67..39396ba40 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1259,5 +1259,6 @@ enum dp_link_rate igt_get_dp_max_link_rate(int drm_fd, igt_output_t *output); enum dp_lane_count igt_get_dp_max_lane_count(int drm_fd, igt_output_t *output); void igt_force_link_retrain(int drm_fd, igt_output_t *output, int retrain_count); void igt_force_lt_failure(int drm_fd, igt_output_t *output, int failure_count); +bool igt_get_dp_link_retrain_disabled(int drm_fd, igt_output_t *output); #endif /* __IGT_KMS_H__ */ -- 2.43.0