linux-kernel - Re: [RESEND PATCH] drm/rockchip: import dma

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Date:	Tue, 17 Nov 2015 16:01:21 +0800
From:	Mark yao <mark.yao@...k-chips.com>
To:	David Airlie <airlied@...ux.ie>, Heiko Stuebner <heiko@...ech.de>,
	Russell King <linux@....linux.org.uk>,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] drm/rockchip: import dma_buf to gem

On 2015年11月17日 00:25, Daniel Vetter wrote:
> On Tue, Nov 10, 2015 at 05:11:57PM +0800, Mark Yao wrote:
>> >We want to display a buffer allocated by other driver, need import
>> >the buffer to gem.
> Does this work with some open-source driver/userspace or is this for the
> proprietary stack only? A bit a grey area I guess, but if it's only for
> the proprietary stack I think it shouldn't land in upstream - making sure
> it works with open-source (e.g. Xorg prime) first would be good.
> -Daniel
>
Hi Daniel
     It works on open-source with following stack:
         ion -> dma_fd  -> prime fd to handle -> drm -> vop

     ion is the android ION memory allocator, its driver at 
upstream-kernel/drivers/staging/android/ion.

     We have some application use ion on android, and want to port to 
Xorg side.

Thanks

-- 
Ｍark Yao


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