[drm:simple_bridge_attach [simple_bridge]] *ERROR* Fix bridge driver to make connector optional!

[Maxime Ripard]

Hi,

Cc'ing Laurent

On Fri, Apr 17, 2020 at 02:18:11PM +0200, H. Nikolaus Schaller wrote:
> Hi Maxime,
> I have started to test v5.7-rc1 and can't fully boot the GTA04
> device any more.
> 
> What I see in the log is:
> 
> [   28.567840] [drm:simple_bridge_attach [simple_bridge]] *ERROR* Fix bridge driver to make connector optional!
> [   28.567871] omapdrm omapdrm.0: unable to attach bridge /ocp at 68000000/dss at 48050000/encoder at 48050c00
> [   28.786529] omapdrm omapdrm.0: omap_modeset_init failed: ret=-22
> [   28.841552] omapdrm: probe of omapdrm.0 failed with error -22
> 
> This device uses the ti,opa362 chip which did have a dedicated
> omapdss driver before (which is removed now) and which seems to
> be supported by the simple_bridge now.
> 
> The opa362 is sitting in the video out path from
> 
> 	omapdrm -> venc -> opa362 -> video-out-connector.
> 
> What does this error mean? How can it be fixed?

-22 is usually EINVAL, which can be pretty much anything. A good thing to do
 would be to bisect to see which actual commit broke it, but if I was to bet on
 something I guess it would be

https://lore.kernel.org/dri-devel/20200226112514.12455-1-laurent.pinchart@ideasonboard.com/

Maxime
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