lkml.org 
[lkml]   [2019]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH 2/5] dt: bindings: Add multicolor class dt bindings documention
From
Date
Marek

On 4/2/19 11:17 AM, Marek Behun wrote:
> On Tue, 2 Apr 2019 06:40:53 -0500
> Dan Murphy <dmurphy@ti.com> wrote:
>
>> I have had off line conversations with Jacek about this brightness model node.
>>
>> Your concern was actually one of my concerns as well. Not only millions of entries but also having a huge
>> DT binary.
>>
>> We wanted to RFC this to get feedback. And this is why I have not added any support for this in the framework code.
>>
>> Dan
>>
>
> What if we just stuck to color spaces and defined channel curves in the
> device tree?
>

Vesa did a good summary of the current MC framework implementations that are being proposed
The thread also documents Pavel's requirements

https://lore.kernel.org/patchwork/patch/1037147/

And here is the series with a single brightness file and passing in multiple integers.
I did not document this code as I was pretty certain it was not the way to go.

https://patches.linaro.org/project/linux-leds/list/?series=18022

Dan

> The curve could then be defined via an array of integer pairs, which
> would be interpreted as points via which the curve passes and the curve
> would be approximated by linear segemts...
>
> led@0 {
> colorspace = <COLOR_SPACE_ID_RGB>;
> red-curve = <0 0>, <255 255>;
> green-curve = <0 0>, <255 128>;
> blue-curve = <0 0>, <255 128>;
> };
>


--
------------------
Dan Murphy

\
 
 \ /
  Last update: 2019-04-02 19:08    [W:0.069 / U:82.904 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site