[PATCH 03/40] drm/rockchip: Respect page offset for PRIME mmap calls

[Heiko Stuebner]

Am Montag, 15. Januar 2018, 18:15:37 CET schrieb Thierry Escande:
> From: Ørjan Eide <orjan.eide at 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 at chromium.org>
> Signed-off-by: Ørjan Eide <orjan.eide at arm.com>
> Signed-off-by: Tomasz Figa <tfiga at chromium.org>
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande at collabora.com>

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