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Fri, 13 Aug 2021 06:27:20 +0000 Received: from AM9PR09MB4884.eurprd09.prod.outlook.com ([fe80::35c9:eaa2:9d67:9ec1]) by AM9PR09MB4884.eurprd09.prod.outlook.com ([fe80::35c9:eaa2:9d67:9ec1%6]) with mapi id 15.20.4415.019; Fri, 13 Aug 2021 06:27:20 +0000 From: Oliver Graute To: gregkh@linuxfoundation.org Cc: oliver.graute@gmail.com, Oliver Graute , Carlis , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1] fbtft: fb_st7789v: added reset on init_display() Date: Fri, 13 Aug 2021 08:25:10 +0200 Message-Id: <20210813062511.14537-1-oliver.graute@kococonnector.com> X-Mailer: git-send-email 2.17.1 X-ClientProxiedBy: AM9P192CA0006.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:21d::11) To AM9PR09MB4884.eurprd09.prod.outlook.com (2603:10a6:20b:281::9) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost (2.207.138.2) by AM9P192CA0006.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:21d::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.17 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: kococonnector.com X-MS-Exchange-CrossTenant-Network-Message-Id: ef8700f8-573c-4097-9f08-08d95e236784 X-MS-Exchange-CrossTenant-AuthSource: AM9PR09MB4884.eurprd09.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Aug 2021 06:27:20.4640 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 59845429-0644-4099-bd7e-17fba65a2f2b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 1UP1208Cs6Vg1UrM6oFUmK/YRwHIhinjJ+gIno57u00qjAGqKUCx4EmdrbJ7VRvAgrCSF26PafKbyAcdG2VkhBhbN+up/0vy5qOeMXdbcnE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR09MB3299 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org staging: fbtft: fb_st7789v: reset display before initialization In rare cases the display is flipped or mirrored. This was observed more often in a low temperature environment. A clean reset on init_display() should help to get registers in a sane state. Signed-off-by: Oliver Graute --- drivers/staging/fbtft/fb_st7789v.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c index 3a280cc1892c..0a2dbed9ffc7 100644 --- a/drivers/staging/fbtft/fb_st7789v.c +++ b/drivers/staging/fbtft/fb_st7789v.c @@ -82,6 +82,8 @@ enum st7789v_command { { int rc; + par->fbtftops.reset(par); + rc = init_tearing_effect_line(par); if (rc) return rc;