Re: [v7 00/16] Add Plane Color Properties

[Ezequiel Garcia <ezequiel@collabora.com>]

(+ Boris, + Sean)

On Fri, 2019-06-14 at 13:17 -0300, Ezequiel Garcia wrote:
> On Thu, 28 Mar 2019 at 16:50, Uma Shankar <uma.shankar@intel.com> wrote:
> > This is how a typical display color hardware pipeline looks like:
> >  +-------------------------------------------+
> >  |                RAM                        |
> >  |  +------+    +---------+    +---------+   |
> >  |  | FB 1 |    |  FB 2   |    | FB N    |   |
> >  |  +------+    +---------+    +---------+   |
> >  +-------------------------------------------+
> >        |  Plane Color Hardware Block |
> >  +--------------------------------------------+
> >  | +---v-----+   +---v-------+   +---v------+ |
> >  | | Plane A |   | Plane B   |   | Plane N  | |
> >  | | DeGamma |   | Degamma   |   | Degamma  | |
> >  | +---+-----+   +---+-------+   +---+------+ |
> >  |     |             |               |        |
> >  | +---v-----+   +---v-------+   +---v------+ |
> >  | |Plane A  |   | Plane B   |   | Plane N  | |
> >  | |CSC/CTM  |   | CSC/CTM   |   | CSC/CTM  | |
> >  | +---+-----+   +----+------+   +----+-----+ |
> >  |     |              |               |       |
> >  | +---v-----+   +----v------+   +----v-----+ |
> >  | | Plane A |   | Plane B   |   | Plane N  | |
> >  | | Gamma   |   | Gamma     |   | Gamma    | |
> >  | +---+-----+   +----+------+   +----+-----+ |
> >  |     |              |               |       |
> >  +--------------------------------------------+
> > +------v--------------v---------------v-------|
> > > >                                           ||
> > > >           Pipe Blender                    ||
> > +--------------------+------------------------+
> > >                    |                        |
> > >        +-----------v----------+             |
> > >        |  Pipe DeGamma        |             |
> > >        |                      |             |
> > >        +-----------+----------+             |
> > >                    |            Pipe Color  |
> > >        +-----------v----------+ Hardware    |
> > >        |  Pipe CSC/CTM        |             |
> > >        |                      |             |
> > >        +-----------+----------+             |
> > >                    |                        |
> > >        +-----------v----------+             |
> > >        |  Pipe Gamma          |             |
> > >        |                      |             |
> > >        +-----------+----------+             |
> > >                    |                        |
> > +---------------------------------------------+
> >                      |
> >                      v
> >                Pipe Output
> > 
> > This patch series adds properties for plane color features. It adds
> > properties for degamma used to linearize data, CSC used for gamut
> > conversion, and gamma used to again non-linearize data as per panel
> > supported color space. These can be utilize by user space to convert
> > planes from one format to another, one color space to another etc.
> > 
> > Usersapce can take smart blending decisions and utilize these hardware
> > supported plane color features to get accurate color profile. The same
> > can help in consistent color quality from source to panel taking
> > advantage of advanced color features in hardware.
> > 
> > These patches just add the property interfaces and enable helper
> > functions.
> > 
> > This series adds Intel Gen9 specific plane gamma feature. We can
> > build up and add other platform/hardware specific implementation
> > on top of this series
> > 
> > Note: This is just to get a design feedback whether these interfaces
> > look ok. Based on community feedback on interfaces, we will implement
> > IGT tests to validate plane color features. This is un-tested currently.
> > 
> > Userspace implementation using these properties have been done in drm
> > hwcomposer by "Alexandru-Cosmin Gheorghe Alexandru-Cosmin.Gheorghe@arm.com"
> > from ARM. A merge request has been opened by Alexandru for drm_hwcomposer,
> > implementing the property changes for the same. Please review that as well:
> > https://gitlab.freedesktop.org/drm-hwcomposer/drm-hwcomposer/merge_requests/25
> > 
> > v2: Dropped legacy gamma table for plane as suggested by Maarten. Added
> > Gen9/BDW plane gamma feature and rebase on tot.
> > 
> > v3: Added a new drm_color_lut_ext structure to accommodate 32 bit precision
> > entries, pointed to by Brian, Starkey for HDR usecases. Addressed Sean,Paul
> > comments and moved plane color properties to drm_plane instead of
> > mode_config. Added property documentation as suggested by Daniel, Vetter.
> > Fixed a rebase fumble which occurred in v2, pointed by Emil Velikov.
> > 
> > v4: Rebase
> > 
> > v5: Added "Display Color Hardware Pipeline" flow to kernel
> > documentation as suggested by "Ville Syrjala" and "Brian Starkey".
> > Moved the property creation to drm_color_mgmt.c file to consolidate
> > all color operations at one place. Addressed Alexandru's review comments.
> > 
> > v6: Rebase. Added support for ICL Color features. Enhanced Lut precision to
> > accept input values in u32.32 format. This is needed for higher precision
> > required in HDR data processing.
> > 
> > v7: Fixed Lut roundup and extraction function in patch 1 and address
> > definitions for Degamma index in patch 10. Rest of the patches are just
> > rebased.
> > 
> 
> I can't find any comments on this one.
> 
> What's the status of this?
> 
> Thanks,
> Eze
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