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 EDD7AC5320E for ; Sun, 25 Aug 2024 19:54:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 98B9A10E110; Sun, 25 Aug 2024 19:54:30 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Qxd0lFOB"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id C0BA810E109 for ; Sun, 25 Aug 2024 19:54:25 +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=oPTinnc7IB2LUzS+4QQflFbGDwRdfcdpSYdeqf0ONS8=; b=Qxd0lFOBKcXB0I1pDQEEYczzk72vcrPjOjVR/3SNQi3rN82UuqWC87Fr Z3+uJUPP+wN+eWExP3TSXQNRGpQRjSQTivw3OqOajNX2FoXYnuDL6ONWK ithlt0lMsgJ9BUTEntS796q1hDsO0eTPbl6tBJ3xwasZJZvL5iEia+tEj zi9SDIT+AJwMhcZwC7xo0pW97+IUydaYUIGaaqPagrZaKZXIDG/MJWx7j eGLfhs3hhLdtN5mGXkljMCSr38GfVnYKmL56EHXbaky1PEsjGWaV4LUh7 s+BR5YfraxfXdun+b9dUbrsxAmd71B7VuE5lCK7cYoXZ7K3n3lg9XhKAB A==; X-CSE-ConnectionGUID: ADgLrYDoQOejiZl+qpsTSg== X-CSE-MsgGUID: +RWcs2h6TRal6c1i8w+sxA== X-IronPort-AV: E=McAfee;i="6700,10204,11175"; a="33591475" X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="33591475" 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 12:54:25 -0700 X-CSE-ConnectionGUID: x5SOu+8QQDiKIUdSYlCF2Q== X-CSE-MsgGUID: pq+1MVj1Tt6atHXkQOb4Zg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,175,1719903600"; d="scan'208";a="62283669" 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 12:54:24 -0700 From: Kunal Joshi To: igt-dev@lists.freedesktop.org Cc: Kunal Joshi Subject: [PATCH i-g-t 06/14] lib/igt_kms: add function to check if retrain disabled Date: Mon, 26 Aug 2024 01:36:04 +0530 Message-Id: <20240825200612.4036178-7-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 retraining is disabled, retraining will be disable if we are at the lowest link parameters or the lowest mode supported on a panel Signed-off-by: Kunal Joshi --- lib/igt_kms.c | 24 ++++++++++++++++++++++++ lib/igt_kms.h | 1 + 2 files changed, 25 insertions(+) diff --git a/lib/igt_kms.c b/lib/igt_kms.c index 683989e84..2720095d4 100644 --- a/lib/igt_kms.c +++ b/lib/igt_kms.c @@ -6869,3 +6869,27 @@ void igt_force_lt_failure(int drm_fd, igt_output_t *output, int failure_count) value, sizeof(value)); close(dir); } + +/** + * igt_get_dp_link_retrain_disabled: + * @drm_fd: A drm file descriptor + * @output: Target output + * + * Returns: True if link retrain disabled, false otherwise + */ +bool igt_get_dp_link_retrain_disabled(int drm_fd, igt_output_t *output) +{ + int dir, res; + 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_link_retrain_disabled", + buf, sizeof(buf)); + close(dir); + igt_require(res > 0); + return strstr(buf, "yes"); +} diff --git a/lib/igt_kms.h b/lib/igt_kms.h index 57829416a..2d69d794a 100644 --- a/lib/igt_kms.h +++ b/lib/igt_kms.h @@ -1253,5 +1253,6 @@ 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_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); #endif /* __IGT_KMS_H__ */ -- 2.34.1