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 19394C5320E for ; Sun, 25 Aug 2024 18:02:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D0AF510E0D9; Sun, 25 Aug 2024 18:02:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="cynsgeAg"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9F05E10E0D7 for ; Sun, 25 Aug 2024 18:02:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724608958; x=1756144958; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Cz7vOSdSeD0Zfd3LqBKx7To/MBwCfFDzWhR+obcmON4=; b=cynsgeAgedHkTlj0n70Rr0qYLSj2tVxT3hvvp2PCq+jRQMKK0ONKxA7U RiT2bAV0sGh7elGORxj8XqGujIm/H+C186M6mxLnLftB/7FB538U6r45m ny24J48lrLBvBf/kbeG1w8dsdYRRZK3A3v/vmvqxbwHNKUQRBTTMHPlu5 C/pJ+5J7qmTsgGEQAtwYZvluqfszeA6tT71W1AwpvVIR3QftJxAb3WF94 LjmT7bA55znkFB8PWFlykVbqtJa0IXTF9Ht9QOtmylgaPojY9qqWaV2Qr Rgyngh7HxoAxSTqc4/eFdt2J8DFOmnazKs7oZsMzwiOOBL9OyURY719uJ Q==; X-CSE-ConnectionGUID: PWWs8lQoR+O2fws9dGDcwQ== X-CSE-MsgGUID: 64PKjb7FQIqak+XUISMZUw== X-IronPort-AV: E=McAfee;i="6700,10204,11175"; a="25917458" X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="25917458" 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 11:02:38 -0700 X-CSE-ConnectionGUID: MO8a0kOiR2mnbe5MxWqJaw== X-CSE-MsgGUID: o0DJIrd1SmGy8xJzI26Juw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="85488306" 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 11:02:37 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi Subject: [PATCH i-g-t 08/14] lib/igt_kms: add helper to get pending lt failures Date: Sun, 25 Aug 2024 23:44:18 +0530 Message-Id: <20240825181424.4034541-9-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" i915_dp_force_link_training_failure can be written to written to trigger link trainig failures on retrain. add helper to get pending link training failure count. Signed-off-by: Kunal Joshi --- lib/igt_kms.c | 23 +++++++++++++++++++++++ lib/igt_kms.h | 1 + 2 files changed, 24 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index 4ab47e2e9..727fa83f1 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6918,3 +6918,26 @@ bool igt_has_force_link_training_failure_debugfs(int drmfd, igt_output_t *output close(debugfs_fd); return ret >= 0; } + +/** + * igt_get_dp_pending_lt_failures: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * Returns: Number of pending link training failures. + */ +int igt_get_dp_pending_lt_failures(int drm_fd, igt_output_t *output) +{ + int dir, res, ret; + 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_force_link_training_failure", buf, sizeof(buf)); + close(dir); + igt_require(res > 0); + sscanf(buf, "%d", &ret); + return ret; +} diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 5ae324f6f..07dbcb263 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1255,5 +1255,6 @@ 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); +int igt_get_dp_pending_lt_failures(int drm_fd, igt_output_t *output); #endif /* __IGT_KMS_H__ */ -- 2.43.0