Received: by 2002:a05:6a10:8a4d:0:0:0:0 with SMTP id dn13csp958973pxb; Fri, 13 Aug 2021 10:04:16 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz7nIHW8BtIAiCLtgRNn1nF29vC9bbB2jaN8GHaPWtCifzASKzFE8YJ5WOJnTH5CQv53RTB X-Received: by 2002:a02:a999:: with SMTP id q25mr3312192jam.16.1628874256108; Fri, 13 Aug 2021 10:04:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1628874256; cv=none; d=google.com; s=arc-20160816; b=fom7ZpZtH+juu0HXFFVkgD4gb9KKbcAUKyVUmqsqVBFjtKJT3mFblOQPA5QFdpCLxh cy+H2w37bfuN6fNK5WXuhmSWWtx5jgT5LjMUVBZkMLTAbYVL0kW0CgTGcL2oqyfg9C8G rgG7kUHllUgh6yrPPOnCDQm0v8FwcfrLF99Io+mz70ltNkxve3oV4E4eZxhsLi3TB+a/ dZIkWWUueYx8eLf7aeCUbOaIWaJa05b5YiqNpZFCrgT4UDcY24QChZVw+YcaFtpEry6P duaPcUn7ZognI7mQjm7MqQgEU1jSBCOTk05/yybdTptI9O5e2c/zt1WD1DYNjQ6mYlkl XLpA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=DFpO+qBefDFJdmKBlflosAnXcmaui0Kv/DNMeLnueiM=; b=s6QNrwQJc4Amv7BMxIKrDqkNDyYNDUTPRJU8UDUEgMMlZ1hO7mVPloKVAHM+SLMIOQ A0OoujKYmnXxBZVfS+0TNzj83wd8M67BK+7jXR9+czAOeG93/X7jdz9vvCYkByynm75F 4PFMYQojUcSWnYtTXB6gIf2AGgTOSd5Py5dWK+OKo/lynBsRV5+xVc4i/8cUq3C5RH36 ZcGu0W/TC6RAZbg2uvVk6Tg3GFN1CifOfEoN7BuBd7wy4ztD1cPJqYncQHWh4lcPSW4M CRI/dSeLeC3MRVfcfagOIkmhfgd0QFOOR772MP4Vmdx1eOMno71OcRds0TbNjYjFBmXw OZcQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=fuY6lYyO; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w17si1945769iod.28.2021.08.13.10.04.04; Fri, 13 Aug 2021 10:04:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=fuY6lYyO; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241073AbhHMPBB (ORCPT + 99 others); Fri, 13 Aug 2021 11:01:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:46428 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241048AbhHMPBA (ORCPT ); Fri, 13 Aug 2021 11:01:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8564C61042; Fri, 13 Aug 2021 15:00:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628866834; bh=I1FekdfmiRJknOkcQKVglzJj1Ot+dwBi5XK4Uv4qoLw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fuY6lYyOpl7hDr0+1ihFss0W58HDyFd8HTcmfb6hCWldAsyNOZKLP6QDAubN5Ho30 td0c9NzbhV791kLwVF6DHPULiHtRnJvQaECbafz7hKPIDiVcneNG5cn9fCumnYXiSs 4gEgVbzkauaN+75E0Uq+qBMctxTS74Qaem0aZfoc= Date: Fri, 13 Aug 2021 17:00:31 +0200 From: Greg KH To: Oliver Graute Cc: Carlis , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1] fbtft: fb_st7789v: added reset on init_display() Message-ID: References: <20210813062511.14537-1-oliver.graute@kococonnector.com> <20210813125430.GA1527@optiplex> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210813125430.GA1527@optiplex> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 13, 2021 at 02:54:30PM +0200, Oliver Graute wrote: > On 13/08/21, Greg KH wrote: > > On Fri, Aug 13, 2021 at 08:25:10AM +0200, Oliver Graute wrote: > > > staging: fbtft: fb_st7789v: reset display before initialization > > > > What is this line here, and why is this not your subject line instead? > > I'll put the line as subject instead. > > > > 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 > > > > What commit does this fix? > > this is a fix for a rare behavior of the fb_st7789v display. Not a > bugfix for a specific commit. So if it has always been broken, list the commit where the code was added to the kernel, as this should be backported to the stable kernels, right? thanks, greg k-h