From patchwork Tue Feb 25 07:05:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pankaj Bharadiya X-Patchwork-Id: 11402639 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 A160314D5 for ; Tue, 25 Feb 2020 07:16:25 +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 89FCF2082F for ; Tue, 25 Feb 2020 07:16:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89FCF2082F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0F1B26E9E0; Tue, 25 Feb 2020 07:16:21 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7EBA86E9DC; Tue, 25 Feb 2020 07:16:19 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Feb 2020 23:16:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,483,1574150400"; d="scan'208";a="230068082" Received: from plaxmina-desktop.iind.intel.com ([10.145.162.62]) by fmsmga007.fm.intel.com with ESMTP; 24 Feb 2020 23:16:13 -0800 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, airlied@linux.ie, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, mripard@kernel.org, mihail.atanassov@arm.com Subject: [RFC][PATCH 0/5] Introduce drm scaling filter property Date: Tue, 25 Feb 2020 12:35:40 +0530 Message-Id: <20200225070545.4482-1-pankaj.laxminarayan.bharadiya@intel.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pankaj.laxminarayan.bharadiya@intel.com, ankit.k.nautiyal@intel.com, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 property to allow userspace to select the driver's default scaling filter or Nearest-neighbor(NN) filter for scaling operations on crtc/plane. - Implements and enable integer scaling for i915 Userspace patch series link: TBD. Thanks to Shashank for initiating this work. His initial RFC can be found here [1] [1] https://patchwork.freedesktop.org/patch/337082/ Modifications done in this series - - refactored code and incorporated initial review comments and added 2 scaling filter types (default and NN) to begin with. - added scaling filter property support for planes and new API helpers for drivers to setup this property. - rewrote code to enable integer scaling and NN filter for i915 Pankaj Bharadiya (5): drm: Introduce scaling filter property drm/drm-kms.rst: Add Scaling filter property documentation drm/i915: Enable scaling filter for plane and pipe drm/i915: Introduce scaling filter related registers and bit fields. drm/i915/display: Add Nearest-neighbor based integer scaling support Documentation/gpu/drm-kms.rst | 6 ++ drivers/gpu/drm/drm_atomic_uapi.c | 8 ++ drivers/gpu/drm/drm_crtc.c | 16 +++ drivers/gpu/drm/drm_mode_config.c | 13 +++ drivers/gpu/drm/drm_plane.c | 35 +++++++ drivers/gpu/drm/i915/display/intel_display.c | 100 ++++++++++++++++++- drivers/gpu/drm/i915/display/intel_display.h | 2 + drivers/gpu/drm/i915/display/intel_sprite.c | 32 ++++-- drivers/gpu/drm/i915/i915_reg.h | 21 ++++ include/drm/drm_crtc.h | 10 ++ include/drm/drm_mode_config.h | 6 ++ include/drm/drm_plane.h | 14 +++ 12 files changed, 252 insertions(+), 11 deletions(-)