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 69466C43458 for ; Mon, 29 Jun 2026 09:03:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0FBFB10E066; Mon, 29 Jun 2026 09:03:52 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="U+2UKqiG"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7B6CE10E066 for ; Mon, 29 Jun 2026 09:03:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782723803; x=1814259803; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=QFIM6qaFFepV6ARO3YUjCLTW++a81j+WHiWnuLGHefY=; b=U+2UKqiGQ1/oQCqNOau1PQRqpiJnYobRvepQq9v+OYOCKmFQEkLpcSzC GF3erBVZVNQcJw5V9x7UWWSZIBmpO8ZL9ZsuA8dowwmkwKOtC/HPqNnUX nqVjwJ2fmqefQiinW6MEFPPt5Vjwyjq+V5Iue2NINg5Pe5HTlh0lYOMcP OpDfY9yKo6usFYqiVK64fc8psPgr24AWsDwaKHB7HTSWhe5boGe05ntVk WOE5G7FqCjA0kL4TRueMZxa9PXfP3LFQDt/t0CVG9bw6WxZ9t4w2KolEG hOQFQiQB3zkKfFkb4mFpVwT5xLVhCFZoaPCLsDt8kxRCZMgmnb3HR4ZF8 Q==; X-CSE-ConnectionGUID: zfB0MNNQSBuifAl3kXQ9VQ== X-CSE-MsgGUID: qLLqVtBETEmp8O1Oxriqsw== X-IronPort-AV: E=McAfee;i="6800,10657,11831"; a="94793452" X-IronPort-AV: E=Sophos;i="6.24,231,1774335600"; d="scan'208";a="94793452" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2026 02:03:22 -0700 X-CSE-ConnectionGUID: gvyAqv6wR8G76cMjG//SHw== X-CSE-MsgGUID: sS4ayIA/RRaRTPk1fdnGcg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,231,1774335600"; d="scan'208";a="281988767" Received: from sowmi-x299-aorus-gaming-3-pro.iind.intel.com ([10.223.74.56]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2026 02:03:21 -0700 From: Sowmiya S To: igt-dev@lists.freedesktop.org Cc: kunal1.joshi@intel.com, swati2.sharma@intel.com, ramanaidu.naladala@intel.com, Sowmiya S Subject: [PATCH i-g-t v4 0/3] Fix 2-display test for MST shared-link BW Date: Mon, 29 Jun 2026 14:56:08 +0530 Message-ID: <20260629092611.298235-1-sowmiya.s@intel.com> X-Mailer: git-send-email 2.43.0 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" On MST hubs / daisy-chain setups two display streams share one DP link; a joint atomic commit can be rejected by the driver if the combined mode bandwidth exceeds the link capacity. The driver therefore adjusts per-pipe settings (for example reducing pipe bpp and enabling dithering) when both streams are committed together, so tests must pick a mode combination the driver will accept. Sowmiya S (3): lib/igt_kms: Add MST bandwidth-fitting support and helpers tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW tests/intel/kms_pipe_stress: Fit display modes to MST link budget lib/igt_kms.c | 74 ++++++++++++++++++++++++++++++ lib/igt_kms.h | 1 + tests/intel/kms_pipe_stress.c | 51 +++++++++++++++++++++ tests/kms_plane_multiple.c | 85 +++++++++++++++++++++++++++++------ 4 files changed, 197 insertions(+), 14 deletions(-) -- 2.51.0