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From:   Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To:     Philippe CORNU <philippe.cornu@st.com>
Cc:     Archit Taneja <architt@codeaurora.org>,
        Andrzej Hajda <a.hajda@samsung.com>,
        David Airlie <airlied@linux.ie>,
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        Bhumika Goyal <bhumirks@gmail.com>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Sandy Huang <hjc@rock-chips.com>,
        Heiko Stubner <heiko@sntech.de>,
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        <linux-arm-kernel@lists.infradead.org>,
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        <linux-rockchip@lists.infradead.org>,
        Yannick FERTRE <yannick.fertre@st.com>,
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        Mickael REULIER <mickael.reulier@st.com>
Subject: Re: [PATCH] drm/bridge/synopsys: dsi: Adopt SPDX identifiers
Date:   Wed, 24 Jan 2018 01:32:08 +0200
Message-ID: <2205915.z0ubSpqczI@avalon>
Organization: Ideas on Board Oy
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References: <20180122102608.12565-1-philippe.cornu@st.com> <3169703.7pajs7FEnH@avalon> <2bf185e2-9b02-3632-dc9a-baf8f4109b44@st.com>
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Hi Philippe,

On Tuesday, 23 January 2018 12:25:51 EET Philippe CORNU wrote:
> On 01/23/2018 12:30 AM, Laurent Pinchart wrote:
> > On Monday, 22 January 2018 12:26:08 EET Philippe Cornu wrote:
> >> Add SPDX identifiers to the Synopsys DesignWare MIPI DSI
> >> host controller driver.
> >>
> >> Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
> >> ---
> >> 
> >>   drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 6 +-----
> >>   1 file changed, 1 insertion(+), 5 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> >> b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index
> >> 46b0e73404d1..e06836dec77c 100644
> >> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> >> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> >> @@ -1,12 +1,8 @@
> >> +// SPDX-License-Identifier: GPL-2.0
> > 
> > According to Documentation/process/license-rules.txt this would change
> > the existing license. The correct identifier is GPL-2.0+.
> 
> You are right, I did not put the correct identifier :(
> 
> After reading more spdx.org, I wonder if the correct value should be 
> GPL-2.0-or-later instead of GPL-2.0+
> 
> https://spdx.org/licenses/GPL-2.0-or-later.html
> https://spdx.org/licenses/GPL-2.0+.html
> 
> What is your opinion?

I agree in principle, and I've even asked for that before, but I've been told 
that we should stick to the license identifiers defined in Documentation/
process/license-rules.txt. The file might get updated to use GPL-2.0-or-later 
and GPL-2.0-only later, and kernel sources will likely then get patched in one 
go.

> >>  /*
> >>   * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
> >>   * Copyright (C) STMicroelectronics SA 2017
> >>   *
> >> - * This program is free software; you can redistribute it and/or modify
> >> - * it under the terms of the GNU General Public License as published by
> >> - * the Free Software Foundation; either version 2 of the License, or
> >> - * (at your option) any later version.
> >> - *
> >>   * Modified by Philippe Cornu <philippe.cornu@st.com>
> >>   * This generic Synopsys DesignWare MIPI DSI host driver is based on the
> >>   * Rockchip version from rockchip/dw-mipi-dsi.c with phy & bridge APIs.

-- 
Regards,

Laurent Pinchart