From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6546B40DB2E for ; Thu, 24 Sep 2026 09:45:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790243151; cv=none; b=fcthaEstcr/FA8k4K9QwNjOazXIrJ3ocsZlgAY5ADLww03uKtR1ilIZVD5fHtb80ipZkTYttR4HMUQZPH9nmXjjniXdeXT4VzqGeDnfE712/SqSLLV1k/+XJ+6m2UbBMEnmNkQMz364Ypmp2zba6AUJKEzL4uCJC/kLwLiFc3Es= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790243151; c=relaxed/simple; bh=sfY11cdtJp865U1tC2f/dZACe/B/9CLIWV3bLlL5Bwk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=LOvFVcFaMyer0ho8Q26WDNGKpz45SsT6IGKaR+DrMW2sXG/Y9+xrgXP92NDGhZNArzy/wxD8eF7MpkqL7oqXCgirVzsAMWCtrhWBXrAWQtwbq+BkysZ/13KrkSXLecG/XpNbe3q9/KkNYbO1rnrsW2DYBDjb0iD664lscjYghBQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=ZDUhi32C; arc=none smtp.client-ip=198.175.65.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ZDUhi32C" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790243143; x=1821779143; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sfY11cdtJp865U1tC2f/dZACe/B/9CLIWV3bLlL5Bwk=; b=ZDUhi32CQTy/a7RW031hzF7/qvvtGlCLInHYbhh0Dsb8RRJmefdabi9P jHKUsR5xnpohUQRwvYEahz/RCC+pbcBQiGTIjIEQRdumpqWcE/gxyQOqx +groIa5AHCvMSNyn/Edufs3SFF5qPR8DgHV77gIamdaMa4OnHhMlfjVY0 FDdYfSe/JRSXiwdJYP5e8vl3ZFuFWRPZdTyl16wpDAIuiN2Ga/PisA+zO x3yUUvZhHoiOTltgdk550HEy4F/plZK1GFqSPFR0G32X68fmy//LrwUM8 Q0zAYgXziQFD0PW7TeP7sl2yiVvg0j8UAYZ+w/yiEJYX9fcasvzodN0Hy w==; X-CSE-ConnectionGUID: fVqX3fIrR0iHyh38KejolQ== X-CSE-MsgGUID: c89iMO75RW2Wliu2V+TCIg== X-IronPort-AV: E=McAfee;i="6800,10657,11914"; a="90048129" X-IronPort-AV: E=Sophos;i="6.27,120,1787036400"; d="scan'208";a="90048129" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Sep 2026 02:45:41 -0700 X-CSE-ConnectionGUID: ON0PMdNNRzSp4iGopxx0CA== X-CSE-MsgGUID: 4/iZC4TMQdCXozfqBD6ing== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,120,1787036400"; d="scan'208";a="311879535" Received: from xiaolu.sh.intel.com ([10.239.146.103]) by orviesa001.jf.intel.com with ESMTP; 24 Sep 2026 02:45:38 -0700 From: Xiao Lu To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, jani.nikula@linux.intel.com, rodrigo.vivi@intel.com, joonas.lahtinen@linux.intel.com, tursulin@ursulin.net, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, Xiao Lu Subject: [PATCH v3 0/2] drm/i915/dp: Fix MST PBN accounting Date: Thu, 24 Sep 2026 17:43:14 +0800 Message-ID: <20260924094316.822211-1-xiaolu.xie@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260922092647.2263962-1-xiaolu.xie@intel.com> References: <20260922092647.2263962-1-xiaolu.xie@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use the raw video PBN in ALLOCATE_PAYLOAD requests while keeping the TU-aligned PBN for source hardware programming. Also track the PBN actually allocated by downstream branches and use it in later bandwidth checks. The series was tested with a three-display PS8650 MST daisy chain. Changes in v3: - Preserve allocated_pbn when recalculating an active payload; clear it only when releasing the payload. - Patch 1 is unchanged. Xiao Lu (2): drm/i915/dp: fix PBN in ALLOCATE_PAYLOAD request to use actual video bandwidth drm/dp_mst: Track allocated_pbn from ALLOCATE_PAYLOAD down-reply drivers/gpu/drm/display/drm_dp_mst_topology.c | 17 +++++++--- drivers/gpu/drm/i915/display/intel_dp_mst.c | 33 ++++++++++++++----- include/drm/display/drm_dp_mst_helper.h | 10 ++++++ 3 files changed, 46 insertions(+), 14 deletions(-) -- 2.43.0