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dkim=none (message not signed) header.d=none; pengutronix.de; dmarc=none action=none header.from=oss.nxp.com; Received: from VI1PR0402MB3902.eurprd04.prod.outlook.com (2603:10a6:803:22::27) by VE1PR04MB6495.eurprd04.prod.outlook.com (2603:10a6:803:11d::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3499.22; Thu, 5 Nov 2020 14:50:47 +0000 Received: from VI1PR0402MB3902.eurprd04.prod.outlook.com ([fe80::f000:d709:509:bb5]) by VI1PR0402MB3902.eurprd04.prod.outlook.com ([fe80::f000:d709:509:bb5%3]) with mapi id 15.20.3499.032; Thu, 5 Nov 2020 14:50:47 +0000 From: Laurentiu Palcu To: Lucas Stach , Philipp Zabel , David Airlie , Daniel Vetter , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team Subject: [PATCH] drm/imx/dcss: allow using nearest neighbor interpolation scaling Date: Thu, 5 Nov 2020 16:50:18 +0200 Message-Id: <20201105145018.27255-1-laurentiu.palcu@oss.nxp.com> X-Mailer: git-send-email 2.17.1 X-Originating-IP: [83.217.231.2] X-ClientProxiedBy: AM0PR03CA0101.eurprd03.prod.outlook.com (2603:10a6:208:69::42) To VI1PR0402MB3902.eurprd04.prod.outlook.com (2603:10a6:803:22::27) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-141.ea.freescale.net (83.217.231.2) by AM0PR03CA0101.eurprd03.prod.outlook.com (2603:10a6:208:69::42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3541.21 via Frontend Transport; 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Otherwise, the default method is used. Signed-off-by: Laurentiu Palcu --- I had no retro pixel art games to test this with, so I used modetest to see the results: To test, I used a 240x135 buffer, upscaled 8 times to 1920x1080: * default scaling method using gaussian filter: /usr/bin/modetest -M imx-dcss -w 33:SCALING_FILTER:0 -P 33@38:240x135*8@XR24 * NN interpolation method: /usr/bin/modetest -M imx-dcss -w 33:SCALING_FILTER:1 -P 33@38:240x135*8@XR24 Thanks, laurentiu drivers/gpu/drm/imx/dcss/dcss-dev.h | 3 ++ drivers/gpu/drm/imx/dcss/dcss-plane.c | 10 +++++- drivers/gpu/drm/imx/dcss/dcss-scaler.c | 47 +++++++++++++++++++++----- 3 files changed, 50 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.h b/drivers/gpu/drm/imx/dcss/dcss-dev.h index c642ae17837f..1e582270c6ea 100644 --- a/drivers/gpu/drm/imx/dcss/dcss-dev.h +++ b/drivers/gpu/drm/imx/dcss/dcss-dev.h @@ -7,6 +7,7 @@ #define __DCSS_PRV_H__ #include +#include #include #include