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 D1EA4C5472C for ; Sun, 25 Aug 2024 19:54:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8FEC910E109; Sun, 25 Aug 2024 19:54:27 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="QuAWgvc4"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4049810E109 for ; Sun, 25 Aug 2024 19:54:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724615666; x=1756151666; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oD3E2Isyc4W2nsXUXPg5hVEVF0PnbIaePw9HhPyjXe4=; b=QuAWgvc4z20r1qh83yfxxliqPXT+3oDVORioEpbnWUCDyezCKVWpOVHu mRVC7yTh1mgT+XMlho32V44YJ9wvZM9+OhdQQ/0wHKa0vZUD7JVI9Rjpr uNvsTGvjfGFsmISLqALD3mfCxXoWC51aC2o9ZGGxga5E1Hqiuy7BeDAwq C1w9wHblLQV1DxqTnD8nItrf03ZzCLGUtgFz5riPG6S2ek1VUwHf7mUzt emUod21+uOfku2uFnOXHklEOjSl68dtBUmmmvwhhBrVMfIT/jFG+kvrby B4WGkPNLYS3jhecBbeJ2/UxG93mWOYbiF4xBut7MIq+g0+Ol2HKKYxLFu A==; X-CSE-ConnectionGUID: TqpIbBNdReCRnSdllfiM3w== X-CSE-MsgGUID: 4rxMIM+4SCqrqHuW2ZKf/Q== X-IronPort-AV: E=McAfee;i="6700,10204,11175"; a="33591479" X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="33591479" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2024 12:54:26 -0700 X-CSE-ConnectionGUID: yMjcByb+QDuG+EQqdwpWPw== X-CSE-MsgGUID: 9715pkhCTBSi+6speZ4pHA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="62283675" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2024 12:54:25 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi Subject: [PATCH i-g-t 07/14] lib/igt_kms: add function to check force link training failure support Date: Mon, 26 Aug 2024 01:36:05 +0530 Message-Id: <20240825200612.4036178-8-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240825200612.4036178-1-kunal1.joshi@intel.com> References: <20240825200612.4036178-1-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 2720095d4..4ab47e2e9 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6893,3 +6893,28 @@ 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 2d69d794a..5ae324f6f 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1254,5 +1254,6 @@ 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__ */ -- 2.34.1