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 6D29FF327A3 for ; Tue, 21 Apr 2026 05:50:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 06B8410E7CD; Tue, 21 Apr 2026 05:50:23 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="gGu8EDOz"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3D2C610E17D for ; Tue, 21 Apr 2026 05:50:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776750611; x=1808286611; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=usho2dnkxdvllUjGYHyQcc7gBL3qOc+P1/WNlv8cpNI=; b=gGu8EDOzBeRh9rjnZnoqloeR0X5ANCLuPxibYwyv376iDuq0bKlDDmls Vqzrlpf0cfLdiu4yvzqxb8BojN5qCQ0Ucj9Sic6/ACDsHmIhPYmoRRfrC wXDiPx6XT8Je8N9EAoqIQk+foox/TRHeScyzxdttJ3Bob+EHpHqWiWK+T QF3TaM6Efh2/hFgJscC9/d8qdfN2h+7fFQYrJyc3xzfKYoqbsI5hlghLe 5IppOukJOLXYhGGbpEkZCnB5kZP2yB+FQJ9uNS6NAiOVCKUzHUTX40JqO EujIrIgvH3F4yq9Jujhfn3FVSAFTtxSeYph/ejcrSL5qeQ7bLVuFQubV4 w==; X-CSE-ConnectionGUID: rP8Rq22WSJ6GZ6iSR40Pvg== X-CSE-MsgGUID: CB49QeX1RvK+uD8RgNZQ/g== X-IronPort-AV: E=McAfee;i="6800,10657,11762"; a="81288124" X-IronPort-AV: E=Sophos;i="6.23,191,1770624000"; d="scan'208";a="81288124" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2026 22:50:10 -0700 X-CSE-ConnectionGUID: dHzypMeeTWq/jHMyeums0A== X-CSE-MsgGUID: RRJnhltJQNOr3vaNGRooxg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,191,1770624000"; d="scan'208";a="225449826" Received: from sowmi-x299-aorus-gaming-3-pro.iind.intel.com ([10.223.74.56]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2026 22:50:08 -0700 From: Sowmiya S To: igt-dev@lists.freedesktop.org Cc: swati2.sharma@intel.com, kunal1.joshi@intel.com, Sowmiya S Subject: [PATCH i-g-t v1 0/2] Fix 2-display test for MST shared-link BW Date: Tue, 21 Apr 2026 11:41:12 +0530 Message-ID: <20260421061114.2262809-1-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 (2): lib/igt_kms: Add MST bandwidth-fitting support and helpers tests/kms_plane_multiple: Fix 2-display test for MST shared-link BW lib/igt_kms.c | 33 +++++++++++++++ lib/igt_kms.h | 3 ++ tests/kms_plane_multiple.c | 87 ++++++++++++++++++++++++++++++++------ 3 files changed, 109 insertions(+), 14 deletions(-) -- 2.43.0