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From: Heiko Stuebner <heiko@sntech.de>
To: linux-rockchip@lists.infradead.org
Cc: Thierry Escande <thierry.escande@collabora.com>,
        Archit Taneja <architt@codeaurora.org>,
        Inki Dae <inki.dae@samsung.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Sandy Huang <hjc@rock-chips.com>, Sean Paul <seanpaul@chromium.org>,
        David Airlie <airlied@linux.ie>, zain wang <wzz@rock-chips.com>,
        Lin Huang <hl@rock-chips.com>, linux-kernel@vger.kernel.org,
        Douglas Anderson <dianders@chromium.org>,
        dri-devel@lists.freedesktop.org, Tomasz Figa <tfiga@chromium.org>,
        Yakir Yang <ykk@rock-chips.com>,
        =?ISO-8859-1?Q?=D8rjan?= Eide <orjan.eide@arm.com>,
        Mark Yao <mark.yao@rock-chips.com>, Haixia Shi <hshi@chromium.org>
Subject: Re: [PATCH 03/40] drm/rockchip: Respect page offset for PRIME mmap calls
Date: Mon, 22 Jan 2018 11:44:25 +0100
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Am Montag, 15. Januar 2018, 18:15:37 CET schrieb Thierry Escande:
> From: Ørjan Eide <orjan.eide@arm.com>
> 
> When mapping external DMA-bufs through the PRIME mmap call, we might be
> given an offset which has to be respected. However for the internal DRM
> GEM mmap path, we have to ignore the fake mmap offset used to identify
> the buffer only. Currently the code always zeroes out vma->vm_pgoff,
> which breaks the former.
> 
> This patch fixes the problem by moving the vm_pgoff assignment to a
> function that is used only for GEM mmap path, so that the PRIME path
> retains the original offset.
> 
> Cc: Daniel Kurtz <djkurtz@chromium.org>
> Signed-off-by: Ørjan Eide <orjan.eide@arm.com>
> Signed-off-by: Tomasz Figa <tfiga@chromium.org>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande@collabora.com>

On rk3036 + lima and rk3328 + lima
Tested-by: Heiko Stuebner <heiko@sntech.de>