[Intel-gfx] [RFC 1/7] drm: Add Plane Degamma properties

[Shankar, Uma]

>-----Original Message-----
>From: Brian Starkey [mailto:brian.starkey at arm.com]
>Sent: Tuesday, November 7, 2017 11:40 PM
>To: Shankar, Uma <uma.shankar at intel.com>
>Cc: intel-gfx at lists.freedesktop.org; Syrjala, Ville <ville.syrjala at intel.com>;
>Lankhorst, Maarten <maarten.lankhorst at intel.com>; dri-
>devel at lists.freedesktop.org
>Subject: Re: [Intel-gfx] [RFC 1/7] drm: Add Plane Degamma properties
>
>On Tue, Nov 07, 2017 at 05:49:56PM +0000, Brian Starkey wrote:
>>
>>In one of the previous discussions[1] related to per-plane color
>>management, Lionel suggested that the 16-bit color lut entries weren't
>>enough when considering HDR.
>>
>>It might be worth creating a new gamma lut format with 32-bit entries
>>for these new properties, as HDR is very much a real rather than
>>hypothetical concern these days.
>>
>>Thanks,
>>-Brian
>
>Sorry, failed to paste the link:
>
>[1] https://patchwork.kernel.org/patch/9546905/

Thanks for the input Brian and sharing the link with earlier discussions around this.
I will try to create a separate LUT structure with 32 bit entries which gets used for plane color
features. Not sure what to do for pipe level color since we already use u16 fields. May be the same
color_lut structure (we can call it color_lut2)  can be used for high precision use cases like HDR.

Regards,
Uma Shankar