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 89F31C27C77 for ; Sun, 9 Jun 2024 21:13:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E7AB110E2CA; Sun, 9 Jun 2024 21:13:53 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ajtZdS0K"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3432610E2C3 for ; Sun, 9 Jun 2024 21:13:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1717967630; x=1749503630; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sHCEvj2R9H22U3bmumukAKqCe3v8vOidnVZQC9fAY3o=; b=ajtZdS0KNvFMt0bQRWUs53o8sFlBmGSIHTGdZnTn+3veF+kg6/kubi77 cO3QxGRLlPQoNW+pmaYWd/KAhkIQhANapEdEeTAkRXxaCAMoH9bYCafLQ 8QRydwmlSQy+j9SzY6QF7q3C4I4N9EHHsySQCszKRUdoyeEWzy1+eQcZA CaA6StPduCHt+fVdHmzuWx4lqGoptaVZ/7aYPjx/aYXzKUNlgX5G6vMSv Mp/wwUrkpX9HtB4wCRYjp0AhulDDO6tdvQI5BqoCutiE+9qrmSSgf0f1+ 8tAdD4JY4IGxv/IG+OvG6kRCayr3n9P+TGQYHdMYQU+8VsyqVQZh1xRDY A==; X-CSE-ConnectionGUID: Zbfd10cATG+dNYDHOrKRRA== X-CSE-MsgGUID: wzX+4klURNCGHKeuN9rseA== X-IronPort-AV: E=McAfee;i="6600,9927,11098"; a="26037487" X-IronPort-AV: E=Sophos;i="6.08,226,1712646000"; d="scan'208";a="26037487" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jun 2024 14:13:50 -0700 X-CSE-ConnectionGUID: RiDCkkDER4KpOTZjyJ8A9g== X-CSE-MsgGUID: qfixBDkdThSLe1zGTP9pWQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,226,1712646000"; d="scan'208";a="38991039" Received: from kunal-x299-aorus-gaming-3-pro.iind.intel.com ([10.190.239.13]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jun 2024 14:13:48 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi Subject: [PATCH i-g-t 7/9] lib/igt_kms: add function to check force link training failure support Date: Mon, 10 Jun 2024 02:55:33 +0530 Message-Id: <20240609212535.868832-8-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240609212535.868832-1-kunal1.joshi@intel.com> References: <20240609212535.868832-1-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 function to check if output supports forcing link training failures 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 4b354826d..be5d7d4fa 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6933,3 +6933,26 @@ void igt_read_link_training_info(int drm_fd, igt_output_t *output, &link_training_info->seq_train_failures) == 5); link_training_info->retrain_disabled = strcmp(retrain_disabled_buf, "yes") == 0; } + +/** + * 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 9301df1e2..58dd90b85 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1268,5 +1268,6 @@ 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_read_link_training_info(int drm_fd, igt_output_t *output, struct dp_link_training_info *link_training_info); +bool igt_has_force_link_training_failure_debugfs(int drmfd, igt_output_t *output); #endif /* __IGT_KMS_H__ */ -- 2.43.0