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 B718FC5472C for ; Sun, 25 Aug 2024 18:02:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6B2D510E0C9; Sun, 25 Aug 2024 18:02:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="FXcDDTAR"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4D54310E0A6 for ; Sun, 25 Aug 2024 18:02:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724608957; x=1756144957; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JmKZfiy4w5+B7B/+JCGCs2VYlgNB4m2Z9gTSU9N85Ec=; b=FXcDDTARsd6O3Scwk4pjY/WgrvtqLMMBd/YO5KGobdFR0kjDL5boxuaJ tm+lsMg1YwQSZMEmd8+Cf5YwWEDNwAkG5ZUJOyWS/uATcaGYxWasTFMEa URcRqaW9EjiaX+R/jzzUvebLPL3oUeqzOXHminW7K/ek40Vbnj6MPBE3I 0rbDdnPxq+ZvlbehNDgD6dhcFN+ip9kHx/Ad7UcCVzhNqidUxOozEXsqd jI3WFCTIf7wwX6xu8ZL8lNhRhZ/sBOpPCI0uCT5oftcEDwXW5sy1crDWu ClCmnoaGzX4ev+eYApLSEMDm2PWeSXH2CoOoiYV0YtHRAt4n6cmO24oh8 g==; X-CSE-ConnectionGUID: htLFtWBTRca2yqBvqkzzFQ== X-CSE-MsgGUID: m08QbKzTQaC2XyswMxIxaQ== X-IronPort-AV: E=McAfee;i="6700,10204,11175"; a="25917457" X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="25917457" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2024 11:02:37 -0700 X-CSE-ConnectionGUID: sRYYL8C9Sl+Ccr+/O7Cxfw== X-CSE-MsgGUID: HRq2lGEKRw6d4gehF0EinQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="85488302" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Aug 2024 11:02:36 -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: Sun, 25 Aug 2024 23:44:17 +0530 Message-Id: <20240825181424.4034541-8-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240825181424.4034541-1-kunal1.joshi@intel.com> References: <20240825181424.4034541-1-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__ */ -- 2.43.0