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 CA408C3DA4A for ; Mon, 19 Aug 2024 09:14:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8941610E22A; Mon, 19 Aug 2024 09:14:30 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Eb2sJMbX"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 91EAB10E22A for ; Mon, 19 Aug 2024 09:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724058870; x=1755594870; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kNuOgYvXfZ3COruipeKIITkF+P+eK7q2uJteyjsrBpM=; b=Eb2sJMbXEv0FBg6kn8xqLas4BU+WzIyQe1RWlgipIdklldkkSVABTqgq bIHma7GC2RUv0IKXcKfw+9ReHewtzAKyfQuYbMXj4I/MZnhjsjhjzeWas ryk8ZwhmuEVE1lqbuQrX7UW9jeFem6EUd+lnW1sPu4FwibtsrfquaopfI 2ch3HlIlZXxZ9KgX6ym5E3hR2x1N6qcUT215HT/XxGphTRojAbP9b28/r MBNXrgtw3KKcLASN70KbQa9t6fCJAV+MhXobmJpq0ojiwbBrpSTf+R16X bmP+ToEkQ+FL70u4Z1jX5O8Y9zFzvAGfqZN4Tx2JiqYo4HbTDO6oN7BWk Q==; X-CSE-ConnectionGUID: ZffS3z8tQUmiQ5TrRXM0/Q== X-CSE-MsgGUID: EK4BrV6cQza2AwnzfjU6og== X-IronPort-AV: E=McAfee;i="6700,10204,11168"; a="44816320" X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="44816320" 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 02:14:30 -0700 X-CSE-ConnectionGUID: daxuK9tUSKqucNzb0hOZoA== X-CSE-MsgGUID: Oof6WnZETIOzYeCo8kDhmA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="60884181" 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 02:14:28 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: imre.deak@intel.com, Kunal Joshi Subject: [PATCH i-g-t 07/12] lib/igt_kms: add function to check force link training failure support Date: Mon, 19 Aug 2024 14:56:10 +0530 Message-Id: <20240819092615.3669803-8-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 platform support forcing link training failures Signed-off-by: Kunal Joshi --- lib/igt_kms.c | 25 +++++++++++++++++++++++++ lib/igt_kms.h | 1 + 2 files changed, 26 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index 1caf9df6e..2948bbb7a 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -7002,3 +7002,28 @@ bool igt_get_dp_link_retrain_disabled(int drm_fd, igt_output_t *output) igt_require(res > 0); return strstr(buf, "yes"); } + +/** + * Checks if the force link training failure debugfs + * is available for a specific output. + * + * @drmfd: file descriptor of the DRM device. + * @output: output to check. + * Returns: + * true if the debugfs is available, false otherwise. + */ +bool igt_has_force_link_training_failure_debugfs(int drmfd, igt_output_t *output) +{ + int debugfs_fd, ret; + char buf[512]; + + igt_assert_f(output->name, "Invalid output\n"); + debugfs_fd = igt_debugfs_connector_dir(drmfd, output->name, O_RDONLY); + if (debugfs_fd < 0) + return false; + ret = igt_debugfs_simple_read(debugfs_fd, + "i915_dp_force_link_training_failure", + buf, sizeof(buf)); + close(debugfs_fd); + return ret >= 0; +} diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 39396ba40..62b1375f2 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1260,5 +1260,6 @@ 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); +bool igt_has_force_link_training_failure_debugfs(int drmfd, igt_output_t *output); #endif /* __IGT_KMS_H__ */ -- 2.43.0