linux-kernel - Re: [PATCH RFC 0/8] Add New DRM Driver for Hisilicon's Hi6220 SoC

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Message-ID: <20150916201657.GC19780@bremse.senecacollege.ca>
Date:	Wed, 16 Sep 2015 13:16:57 -0700
From:	Daniel Vetter <daniel@...ll.ch>
To:	Daniel Stone <daniel@...ishbar.org>
Cc:	Xinwei Kong <kong.kongxinwei@...ilicon.com>,
	yinshengbao@...ilicon.com, xuyiping@...ilicon.com,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>, yanhaifeng@...ilicon.com,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	andy.green@...aro.org, haojian.zhuang@...aro.org,
	fangdechun@...ilicon.com, puck.chen@...ilicon.com,
	ml.yang@...ilicon.com, gongyu@...ilicon.com, xuwei5@...ilicon.com,
	liguozhu@...ilicon.com, qijiwen@...ilicon.com,
	james.yanglong@...ilicon.com
Subject: Re: [PATCH RFC 0/8] Add New DRM Driver for Hisilicon's Hi6220 SoC

On Wed, Sep 16, 2015 at 04:23:35PM +0100, Daniel Stone wrote:
> The biggest issue though, is that this driver should become an atomic
> modesetting driver. Atomic modesetting, rather than sending small
> individual commands (enable CRTC, change plane position, etc) is based
> on validating and passing around complete sets of hardware state.
> Daniel Vetter's blog has an article on how to convert your driver:
> http://blog.ffwll.ch/2014/11/atomic-modeset-support-for-kms-drivers.html

Yeah, any new driver should really be built on top of atomic - it's a lot
more flexible than the old thing and it's also what you want long-term.

I've also just done a presenation about atomic for drivers:

http://people.freedesktop.org/~danvet/presentations/xdc-2015.pdf

Cheers, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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