[PATCH 04/41] drm/rockchip: Respect page offset for PRIME mmap calls

Heiko Stuebner heiko at sntech.de
Tue Dec 12 08:58:24 PST 2017


Am Donnerstag, 9. März 2017, 23:32:19 CET schrieb Sean Paul:
> 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.
> BUG=chrome-os-partner:56615
> TEST=graphics_GLBench

Unneeded chromeos-cruft.

> 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>

With the same testas patch 3  (rk3328 + lima)
Tested-by: Heiko Stuebner <heiko at sntech.de>

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