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Message-ID: <5480308F.6070607@ti.com>
Date:	Thu, 4 Dec 2014 11:59:43 +0200
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>
CC:	Arnd Bergmann <arnd@...db.de>,
	"plagnioj@...osoft.com" <plagnioj@...osoft.com>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"alexander.stein@...tec-electronic.com" 
	<alexander.stein@...tec-electronic.com>
Subject: Re: [PATCHv2 0/4] LS1021A: Add dcfb framebuffer driver support.

On 04/12/14 11:54, Li.Xiubo@...escale.com wrote:
> Hi Tomi,
> 
> Thanks for your information very much.
> 
>>> Sorry for confusing, it was delayed for other reasons internal.
>>>
>>> I am not familiar about the DRM, and I'd like to know if the DRM driver will
>> be
>>> support, should I also develop the libdrm too ? Or just coding in kernel
>> level ?
>>
>> For simple drm drivers (this looks like it would be a simple one), I
>> don't think there's any need for libdrm support. The generic DRM
>> interfaces should be enough, so just kernel level coding needed.
>>
> 
> That's to say, if I am using the X11 server without any code in usrspace,
> If the DRM driver will support /dev/fbX, it could work correctly ?

Yes. DRM offers helper code to add /dev/fbX with not too many lines. You
can look at the docs and drm_fb_helper.c.

And X11 should work fine on top of that, using the X11 fbdev support.

 Tomi



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