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 96B40CCD18E for ; Wed, 15 Oct 2025 10:35:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1647810E036; Wed, 15 Oct 2025 10:35:50 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="mqiHiyyp"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7834B10E036; Wed, 15 Oct 2025 10:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1760524549; x=1792060549; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=pyRWpTx+28daC29UG018S9EhdB7zpr3ZhIcda/aayBQ=; b=mqiHiyypsLiuLraBWh+ft9ysBB5l1aZlIjyO/nyU/ltKOSFEjyi/U4jh Lkq0BQgSvXknzrTO+BKI/q2CJJMPukjYr5wozqBYSEcRmxl8L2CMMStIy JIlhfBziDHPoSLRrzNJmexW0eB8eMpU1yG6nJPyS6KIF1ZT7EkTvXp0XL XxhUAuIuj1yBmqaly+9WTPAApaDesZlu7hy6DermkbTmBdrDxq4bhMxR1 /q+/8t1D07bhWctvRHiLWe09ppJ6rOryY6gnJXovuC7MC+CYXiolRhNmE +ImjyfrJ9JlinZJ35mEX1wNo1z3tsFti4sce9l50H6qir4qj0aeFX0Fvf Q==; X-CSE-ConnectionGUID: WvMv0R3yR6+iU/mOV2JReQ== X-CSE-MsgGUID: pgvs7qrCTry1+b/NyMKckQ== X-IronPort-AV: E=McAfee;i="6800,10657,11582"; a="50262599" X-IronPort-AV: E=Sophos;i="6.19,231,1754982000"; d="scan'208";a="50262599" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2025 03:35:48 -0700 X-CSE-ConnectionGUID: a0L2ifNuQjycgPddEnY3SQ== X-CSE-MsgGUID: S+bklzjcR3eLwUV5s0e1Qw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,231,1754982000"; d="scan'208";a="205842517" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2025 03:35:46 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: ville.syrjala@linux.intel.com, uma.shankar@intel.com, Ankit Nautiyal Subject: [PATCH 0/6] Optimize vrr.guardband Date: Wed, 15 Oct 2025 15:52:35 +0530 Message-ID: <20251015102241.1797828-1-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Instead of setting vrr.guardband to vblank, use optimal guardband that works for most of the cases. This will help in avoiding need of change in guardband and fix the LRR feature that needs seamless switching to a lower refresh rate. -Patch [1-2] are squashed from series [1] and [2] and are not meant for review. -Patch [3-6] are patches to check the guardband for prefill+PSR+SDP latencies and to use a static optimized guardband. [1] "Preparatory patches for guardband optimization" https://patchwork.freedesktop.org/series/155661/#rev7 [2] "Introduce helpers for prefill latency calculations" https://patchwork.freedesktop.org/series/155629/#rev2 Ankit Nautiyal (5): [NOT FOR REVIEW] drm/i915/vrr: prep patches for guardband optimization squashed drm/i915/dp: Add SDP latency computation helper drm/i915/psr: Add function to compute max link-wake latency drm/i915/display: Add guardband check for feature latencies drm/i915/vrr: Use the min static optimized guardband Ville Syrjälä (1): [NOT FOR REVIEW] drm/i915/prefill: Prefill latency calculations series squashed drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/intel_cdclk.c | 80 +++++- drivers/gpu/drm/i915/display/intel_cdclk.h | 6 + drivers/gpu/drm/i915/display/intel_ddi.c | 3 + drivers/gpu/drm/i915/display/intel_display.c | 82 +++++- drivers/gpu/drm/i915/display/intel_dp.c | 42 +++ drivers/gpu/drm/i915/display/intel_dp.h | 4 + drivers/gpu/drm/i915/display/intel_psr.c | 257 +++++++++++++------ drivers/gpu/drm/i915/display/intel_psr.h | 3 + drivers/gpu/drm/i915/display/intel_vblank.c | 10 + drivers/gpu/drm/i915/display/intel_vblank.h | 2 + drivers/gpu/drm/i915/display/intel_vdsc.c | 8 + drivers/gpu/drm/i915/display/intel_vdsc.h | 1 + drivers/gpu/drm/i915/display/intel_vrr.c | 90 ++++++- drivers/gpu/drm/i915/display/intel_vrr.h | 2 +- drivers/gpu/drm/i915/display/skl_prefill.c | 157 +++++++++++ drivers/gpu/drm/i915/display/skl_prefill.h | 46 ++++ drivers/gpu/drm/i915/display/skl_scaler.c | 198 ++++++++++++++ drivers/gpu/drm/i915/display/skl_scaler.h | 15 ++ drivers/gpu/drm/i915/display/skl_watermark.c | 156 +++++------ drivers/gpu/drm/i915/display/skl_watermark.h | 3 + drivers/gpu/drm/xe/Makefile | 1 + 22 files changed, 983 insertions(+), 184 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/skl_prefill.c create mode 100644 drivers/gpu/drm/i915/display/skl_prefill.h -- 2.45.2