Re: Using LVDS in a iMX6Q/D from Barebox

[gianluca <gianlucarenzi@eurekelettronica.it>]

On 02/16/2017 08:28 AM, Sascha Hauer wrote:
> On Wed, Feb 15, 2017 at 03:34:55PM +0100, gianluca wrote:
>> On 02/15/2017 12:51 PM, Sascha Hauer wrote:
>>> On Tue, Feb 14, 2017 at 11:32:44AM +0100, gianluca wrote:
>>>> On 02/10/2017 08:35 AM, Sascha Hauer wrote:
>> If no eeprom is found activate the status of the hdmi node from "disabled"
>> to "okay". So with the same algorithm as above,
>>
>> Those operations will be done in the coredevice_initcall() level. Is this
>> correct?
>
> Sounds like a plan. I'm not sure though if you find your EEPROM at
> coredevice_initcall time.
>

Nope. Accessing device drivers (enabled in the device-tree) is possible 
in the section: device_initcall() and *NOT* in the coredevice_initcall() 
time.

Anyway I was wondering if looking for a node in the device-tree, it will 
be possible to change the status of that node.

in DTS I have

&hdmi {
	status="disabled";
}

but I need to set the status to "okay" later on the device_initcall() time.

Iterating in the device tree using for_each_node_by_name_from() does not 
show any node like hdmi, but using the same function to look for any 
"display-timing" section it works.

Why? Where I have to look on to change the status of the device driver 
node &hdmi and &ldb?

I see a lot of __fixup() functions but I do not understand it correctly.
Like to change the phandle of the native-mode too..

Regards,
-- 
Eurek s.r.l.                          |
Electronic Engineering                | http://www.eurek.it
via Celletta 8/B, 40026 Imola, Italy  | Phone: +39-(0)542-609120
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