imx6 DRI/DRM

imx6 DRI/DRM

[Ian Molton]

Hi,

Can anyone tell me where best to follow / contribute to *mainline* kernel based imx6 graphics stuff?

I'm currently running a 3.19-rc kernel with imx6 drm (fbdev emulation) and it works, but I'm seeing segfaults from Xfbdev.

Presumably, theres a proper DRM/DRI X driver to go with the kernel bits?

Where can I find that?

Thanks,

-Ian
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Re: imx6 DRI/DRM

[Sascha Hauer]

Hi Ian,

On Wed, Jan 28, 2015 at 12:08:19PM +0000, Ian Molton wrote:
> Hi,
> 
> Can anyone tell me where best to follow / contribute to *mainline* kernel based imx6 graphics stuff?
> 
> I'm currently running a 3.19-rc kernel with imx6 drm (fbdev emulation) and it works, but I'm seeing segfaults from Xfbdev.
> 
> Presumably, theres a proper DRM/DRI X driver to go with the kernel bits?

There is the xf86modesetting driver:

http://cgit.freedesktop.org/xorg/driver/xf86-video-modesetting/

There's no dedicated i.MX X driver that works with imx-drm.

Sascha

-- 
Pengutronix e.K.                           |                             |
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Re: imx6 DRI/DRM

[Ian Molton]

On 28/01/15 12:52, Sascha Hauer wrote:
> Hi Ian,
>
> On Wed, Jan 28, 2015 at 12:08:19PM +0000, Ian Molton wrote:
>> Hi,
>>
>> Can anyone tell me where best to follow / contribute to *mainline* kernel based imx6 graphics stuff?
>>
>> I'm currently running a 3.19-rc kernel with imx6 drm (fbdev emulation) and it works, but I'm seeing segfaults from Xfbdev.
>>
>> Presumably, theres a proper DRM/DRI X driver to go with the kernel bits?
>
> There is the xf86modesetting driver:
>
> http://cgit.freedesktop.org/xorg/driver/xf86-video-modesetting/
>
> There's no dedicated i.MX X driver that works with imx-drm.

Im not currently "up" on how the whole stack works - is this driver generic to anything using kms? do I still need fbdev?

Is there a good overview of things, particularly wrt. imx6?

-Ian

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Re: imx6 DRI/DRM

[Sascha Hauer]

On Wed, Jan 28, 2015 at 12:56:06PM +0000, Ian Molton wrote:
> On 28/01/15 12:52, Sascha Hauer wrote:
> >Hi Ian,
> >
> >On Wed, Jan 28, 2015 at 12:08:19PM +0000, Ian Molton wrote:
> >>Hi,
> >>
> >>Can anyone tell me where best to follow / contribute to *mainline* kernel based imx6 graphics stuff?
> >>
> >>I'm currently running a 3.19-rc kernel with imx6 drm (fbdev emulation) and it works, but I'm seeing segfaults from Xfbdev.
> >>
> >>Presumably, theres a proper DRM/DRI X driver to go with the kernel bits?
> >
> >There is the xf86modesetting driver:
> >
> >http://cgit.freedesktop.org/xorg/driver/xf86-video-modesetting/
> >
> >There's no dedicated i.MX X driver that works with imx-drm.
> 
> Im not currently "up" on how the whole stack works - is this driver generic to anything using kms? do I still need fbdev?

The xf86modesetting driver should work with any kms driver (though it's
been some time since I last tested it with imx-drm)
You won't need fbdev, but without it the kernel does not activate the
display during boot, so it will just stay dark until X starts.

> 
> Is there a good overview of things, particularly wrt. imx6?

Not that I know of, at least there's no i.MX specific drm documentation.

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
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