From patchwork Thu Mar 12 11:14:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pankaj Bharadiya X-Patchwork-Id: 11433953 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9837F92C for ; Thu, 12 Mar 2020 11:24:50 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 8185A206F1 for ; Thu, 12 Mar 2020 11:24:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8185A206F1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E1BE26E162; Thu, 12 Mar 2020 11:24:47 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id E5F976E14E; Thu, 12 Mar 2020 11:24:46 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Mar 2020 04:24:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,544,1574150400"; d="scan'208";a="354108230" Received: from plaxmina-desktop.iind.intel.com ([10.145.162.62]) by fmsmga001.fm.intel.com with ESMTP; 12 Mar 2020 04:24:42 -0700 From: Pankaj Bharadiya To: jani.nikula@linux.intel.com, daniel@ffwll.ch, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, ville.syrjala@linux.intel.com, daniels@collabora.com Date: Thu, 12 Mar 2020 16:44:44 +0530 Message-Id: <20200312111449.21202-1-pankaj.laxminarayan.bharadiya@intel.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 0/5] Introduce drm scaling filter property 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" This series is the continuation for the RFC that I posted earlier [1] [1] RFC: https://patchwork.freedesktop.org/series/73884/ Integer scaling (IS) is a nearest-neighbor upscaling technique that simply scales up the existing pixels by an integer (i.e., whole number) multiplier. Nearest-neighbor (NN) interpolation works by filling in the missing color values in the upscaled image with that of the coordinate-mapped nearest source pixel value. Both IS and NN preserve the clarity of the original image. In contrast, traditional upscaling algorithms, such as bilinear or bicubic interpolation, result in blurry upscaled images because they employ interpolation techniques that smooth out the transition from one pixel to another. Therefore, integer scaling is particularly useful for pixel art games that rely on sharp, blocky images to deliver their distinctive look. Many gaming communities have been asking for integer-mode scaling support, some links and background: https://software.intel.com/en-us/articles/integer-scaling-support-on-intel-graphics http://tanalin.com/en/articles/lossless-scaling/ https://community.amd.com/thread/209107 https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/1002/feature-request-nonblurry-upscaling-at-integer-rat/ This patch series - - Introduces new scaling filter properties to allow userspace to select the driver's default scaling filter or Nearest-neighbor(NN) filter for scaling operations on crtc and plane. - Implements and enable integer scaling for i915 Userspace patch series link: TBD. Thanks to Shashank for initiating this work. His initial work can be found here [2] [2] https://patchwork.freedesktop.org/patch/337082/ Pankaj Bharadiya (5): drm: Introduce plane and CRTC scaling filter properties drm/drm-kms.rst: Add plane and CRTC scaling filter property documentation drm/i915: Introduce scaling filter related registers and bit fields. drm/i915/display: Add Nearest-neighbor based integer scaling support drm/i915: Enable scaling filter for plane and CRTC Documentation/gpu/drm-kms.rst | 12 +++ drivers/gpu/drm/drm_atomic_uapi.c | 8 ++ drivers/gpu/drm/drm_crtc.c | 33 +++++++ drivers/gpu/drm/drm_mode_config.c | 26 ++++++ drivers/gpu/drm/drm_plane.c | 33 +++++++ drivers/gpu/drm/i915/display/intel_display.c | 98 +++++++++++++++++++- drivers/gpu/drm/i915/display/intel_display.h | 2 + drivers/gpu/drm/i915/display/intel_sprite.c | 31 ++++++- drivers/gpu/drm/i915/i915_reg.h | 48 ++++++++++ include/drm/drm_crtc.h | 13 +++ include/drm/drm_mode_config.h | 12 +++ include/drm/drm_plane.h | 13 +++ 12 files changed, 326 insertions(+), 3 deletions(-)