Re: [PATCH/RESEND 9/9] drm/tilcdc: replace late_initcall with module_init

[Russell King - ARM Linux <linux@arm.linux.org.uk>]

On Wed, Jun 25, 2014 at 02:00:42PM +0100, Russell King - ARM Linux wrote:
> On Tue, Jun 24, 2014 at 05:04:36PM -0500, Darren Etheridge wrote:
> > On 06/17/2014 09:17 AM, Guido Martínez wrote:
> >> Use module_init instead of late_initcall, as is the norm for modular
> >> drivers.
> >>
> >> module_init was used until 6e8de0bd6a51fdeebd5d975c4fcc426f730b339b
> >> ("drm/tilcdc: add encoder slave (v2)") changed it to a late_initcall,
> >> but it does not explain why. Tests show it's working properly with
> >> module_init.
> >>
> >
> > If I recall, the late_initcall stuff was done to try and make sure the  
> > tda998x/i2c subsystem came up before tilcdc. However it didn't always  
> > work so we added commit: 39de6194131c155901f96686a063212656d80c2e to try  
> > and ensure the ordering.  This might be why changing back to module_init  
> > is fine (and I agree with your assessment from my testing).
> 
> There's a solution to that... I have patches which convert the tda998x
> driver to also register into the component helpers as well as remaining
> as a drm slave device.  This makes it possible to transition tilcdc to
> use the component helper to solve the initialisation ordering.
> 
> I'll (re-)post them later today.

Except Daniel Mack will not be receiving any copies of them:

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